In modern engineering manufacturing, where tolerances are tightening and material diversity is expanding, this cutting method has become a precision benchmark.

Industry data shows that non-thermal cutting processes can reduce secondary finishing operations by more than 30 percent in precision-focused manufacturing environments.

That efficiency matters as engineers increasingly work with composites, hardened alloys, and multi-material assemblies that are poorly heat-resistant.

Material precision is not just about hitting nominal dimensions.

It is about edge integrity, repeatability, structural stability, and predictable performance once parts move into assembly or service.

This article explores how advanced waterjet cutting works, why it delivers such high precision, how it compares to alternative cutting technologies, and where it fits best in modern engineering manufacturing workflows.

What Is Advanced Waterjet Cutting and Why Does It Matter for Precision Manufacturing?

Advanced waterjet cutting is a machining method that removes material through controlled erosion using a focused stream of pressurized water, with or without abrasive media.

It matters for precision manufacturing because it cuts without introducing heat, mechanical stress, or microstructural changes to the material.

Unlike thermal or mechanical cutting methods, waterjet cutting preserves the original material properties.

That preservation directly translates into tighter dimensional accuracy and improved consistency across production runs.

For engineers, this means fewer unpredictable variables.

Parts come off the table closer to the final specification, which reduces rework, scrap rates, and downstream inspection failures.

As manufacturing shifts toward complex geometries and mixed materials, waterjet cutting provides a stable, predictable process window that supports precision rather than fighting against it.

How Does Waterjet Cutting Work at an Engineering Level?

The waterjet cutting process is a controlled material removal technique that converts hydraulic energy into a high-velocity cutting stream capable of eroding solid materials.

In engineering manufacturing, the process is valued for its predictable physics and scalable precision.

Water is pressurized up to 90,000 psi and directed through a precision orifice, creating a coherent jet with extreme kinetic energy.

For harder materials, abrasive particles such as garnet are introduced into the stream, enabling efficient cutting of metals, ceramics, and composites.

The cutting action occurs through micro-scale erosion rather than melting or shearing.

That distinction is critical because it eliminates thermal gradients and residual stresses.

The main stages of the waterjet cutting process include five distinct steps.

1. Pressurizing water to ultra-high levels using an intensifier or direct-drive pump
2. Forming a focused jet through a diamond, sapphire, orifice
3. Introducing abrasive media when cutting dense or complex materials
4. Guiding the jet along programmed toolpaths using CNC control
5. Dissipating energy safely in a catcher tank after material separation

Each stage contributes directly to the final dimensional accuracy of the cut part.

What Makes Waterjet Cutting a High-Precision Manufacturing Technology?

Advanced waterjet cutting is a manufacturing technology that achieves precision through controlled erosion, stable energy delivery, and digital motion control.

Its ability to maintain accuracy across thickness variations and material types sets it apart in engineering applications.

Because the process is cold, the cut geometry remains true to the programmed path.

There is no thermal expansion, no warping, and no recast layer along the edge.

Modern systems integrate CNC motion platforms, taper compensation software, and closed-loop pressure control.

Together, these elements allow engineers to hold tight tolerances even on thick or layered materials.

Precision in waterjet cutting is not accidental.

It is engineered through system stability, software intelligence, and material-specific parameter control.

Cold Cutting and Its Impact on Dimensional Accuracy

Cold cutting is a material removal approach that avoids heat generation entirely during the cutting process.

In waterjet cutting, cold cutting preserves the material’s original mechanical and chemical properties.

When heat is introduced, materials expand, soften, or harden unevenly.

Waterjet cutting avoids these effects, which allows parts to remain dimensionally stable throughout and after cutting.

This stability is essential in aerospace alloys, hardened steels, and laminated composites.

Dimensional accuracy remains consistent from the first cut to the last.

For engineers, cold cutting simplifies tolerance planning and reduces the need for post-processing corrections.

Kerf Width Control and Edge Finish Consistency

Kerf width control is the ability to maintain a consistent cut width along the entire toolpath.

In waterjet cutting, kerf control directly influences part accuracy and edge quality.

Advanced systems regulate pressure, abrasive flow rate, and traverse speed to stabilize the cutting stream.

This stability minimizes kerf variation, even when cutting complex geometries or variable thicknesses.

Consistent edge finish reduces the need for secondary grinding or machining.

It also improves fit-up accuracy during assembly.

Precision edge control is one reason advanced waterjets are often selected for tight-tolerance engineering components.

What Are the Main Types of Waterjet Cutting Systems Used in Engineering Manufacturing?

Waterjet cutting systems fall into two primary categories based on how the cutting energy is applied.

Each type serves different precision and material requirements within engineering manufacturing.

The choice between systems depends on material hardness, thickness, and surface finish expectations.

Understanding the differences helps engineers select the right tool for the job.

Pure Waterjet Cutting Systems

Pure waterjet cutting systems use only pressurized water without abrasive additives.

They are primarily used for softer materials that require precision without excessive cutting force.

Typical applications include polymers, rubber, foam, textiles, and certain food-grade materials.

The cutting action is clean, precise, and free from contamination.

Pure waterjet systems excel in applications where edge integrity and material cleanliness are critical.

They also offer lower operating costs compared to abrasive systems.

Abrasive Waterjet Cutting Systems

Abrasive waterjet cutting systems introduce hard mineral particles into the water stream to cut dense materials.

These machines are the backbone of precision engineering manufacturing.

They can cut steel, aluminum, titanium, glass, stone, ceramics, and composites.

The abrasive particles perform the erosion while water acts as the energy carrier.

Modern abrasive systems, such as precision waterjet cutting machines, combine CNC motion control with stable pressure delivery to maintain accuracy across complex parts.

These systems enable engineers to achieve tight tolerances without sacrificing material integrity.

What Materials Benefit Most from Precision Waterjet Cutting?

Waterjet cutting supports a wide range of engineering materials with minimal process-induced distortion.

Some material groups are more sensitive to heat or mechanical stress than others.

The six material categories that gain the most precision advantages include:

1. Metals such as steel, aluminum, and titanium, where thermal distortion must be avoided
2. Composites like carbon fiber and fiberglass that delaminate under heat
3. Ceramics and glass that crack under mechanical cutting forces
4. Laminated materials with dissimilar layers and expansion rates
5. Stone and engineered surfaces requiring clean, chip-free edges
6. Plastics that melt or deform under laser or plasma cutting

This versatility makes waterjet cutting a universal precision tool.

What Are the Key Advantages of Advanced Waterjet Cutting for Material Precision?

Advanced waterjet cutting delivers several precision-related advantages that directly impact manufacturing quality.

These advantages extend beyond dimensional accuracy alone.

There are exactly seven primary benefits.

1. Preserves material properties by eliminating heat input
2. Maintains tight tolerances across varying thicknesses
3. Produces clean edges with minimal secondary finishing
4. Cuts virtually any material without a tool change
5. Supports complex geometries and internal features
6. Reduces fixturing stress due to low cutting forces
7. Enables consistent results in low-volume and high-mix production

Each benefit contributes to predictable, repeatable manufacturing outcomes.

What Are the Limitations of Waterjet Cutting in Precision Engineering Applications?

Waterjet cutting is exact, but it is not without limitations.

Understanding these constraints helps engineers apply the technology appropriately.

There are precisely five notable limitations.

1. Increases operating costs due to abrasive consumption
2. Limits cutting speed compared to some thermal methods
3. Requires careful control to prevent taper on thick materials
4. Generates slurry waste that must be managed
5. May struggle with excellent micro-scale features

Despite these drawbacks, many precision applications still favor waterjet cutting for its ability to maintain material integrity.

How Does Waterjet Cutting Compare to Laser and Plasma Cutting for Precision Manufacturing?

Waterjet cutting, laser cutting, and plasma cutting differ fundamentally in how they remove material.

Waterjet cutting provides superior material preservation, while laser and plasma excel in speed for thin metals.

Laser cutting introduces heat, which can affect microstructure and tolerances.

Plasma cutting introduces even more thermal distortion and wider kerfs.

Waterjet cutting avoids both issues but operates at slower speeds and higher consumable costs.

The trade-off is improved accuracy, edge quality, and material flexibility.

A comparison table would typically evaluate heat input, material range, tolerances, edge finish, and operating cost to clarify these differences.

What Engineering Applications Rely on Waterjet Cutting for High Precision?

Waterjet cutting supports a broad range of engineering applications where accuracy and material integrity are critical.

Its adoption spans multiple industries.

There are precisely six major application areas.

1. Aerospace component manufacturing
2. Automotive prototyping and low-volume production
3. Architectural and structural fabrication
4. Electronics and enclosure manufacturing
5. Medical device component cutting
6. Research and experimental engineering projects

In laboratory and research environments, precision surface preparation and component fabrication are often paired with advanced cleaning methods such as industrial laser cleaning machines to maintain contamination-free surfaces before assembly or testing.

What Are the Most Important Parameters That Influence Waterjet Cutting Precision?

Precision in waterjet cutting depends on controlling multiple interrelated parameters.

Each parameter affects kerf quality, accuracy, and repeatability.

The seven most critical parameters include:

1. Water pressure stability
2. Abrasive type and grain size
3. Abrasive flow rate
4. Cutting speed and acceleration
5. Nozzle condition and alignment
6. Stand-off distance
7. CNC motion accuracy

Fine-tuning these variables allows engineers to optimize precision for each material.

What Tolerances Can Advanced Waterjet Cutting Achieve?

Advanced waterjet cutting can achieve tolerances as tight as ±0.05 mm for thin materials under controlled conditions.

Tolerance capability decreases gradually as material thickness increases.

For thin materials up to 1 mm, tolerances typically range from ±0.1 mm to ±0.2 mm.

For medium thickness materials between 1 mm and 5 mm, tolerances range from ±0.2 mm to ±0.5 mm.

For materials over 5 mm thick, tolerances are usually ±0.5 mm to ±1.0 mm, or approximately ±0.020 to ±0.040 inches.

How to Use Waterjet Cutting to Maximize Material Precision

Maximizing precision with waterjet cutting involves a structured process from design through execution.

There are precisely five main steps involved.

1. Material selection and characterization
2. Design optimization for waterjet behavior
3. Parameter calibration and testing
4. Controlled cutting execution
5. Post-cut inspection and verification

Each step builds on the previous one to ensure predictable outcomes.

Material Preparation and Design Optimization

Material preparation is the process of selecting and configuring raw stock for accurate cutting.

Design optimization ensures features align with waterjet capabilities.

Engineers must account for kerf width, taper compensation, and minimum feature sizes.

Proper nesting reduces distortion and improves efficiency.

Good preparation directly improves final dimensional accuracy.

Machine Setup and Parameter Calibration

Machine setup is the process of configuring pressure, abrasive flow, and motion parameters.

Calibration ensures the system delivers consistent energy throughout the cut.

Trial cuts and test coupons help validate settings before production.

This step is critical for achieving repeatable precision.

How Much Does Precision Waterjet Cutting Cost in Engineering Manufacturing?

Precision waterjet cutting typically costs between 250 per hour in the United States.

Pricing varies based on material, thickness, and complexity.

There are precisely six cost factors.

1. Machine time
2. Abrasive consumption
3. Material type
4. Thickness and cutting speed
5. Programming complexity
6. Post-processing requirements

Understanding these factors helps engineers balance cost and precision.

What Should Engineers Look for in a High-Precision Waterjet Cutting System?

A high-precision waterjet system is defined by stability, control, and long-term accuracy.

Engineers should evaluate systems beyond headline pressure ratings.

Key indicators include motion accuracy, software compensation features, pump reliability, and service support.

Precision is sustained through consistency, not peak performance alone.

Conclusion: Why Waterjet Cutting Is a Precision Benchmark in Engineering Manufacturing

Advanced waterjet cutting has earned its role as a precision benchmark by combining material versatility with predictable accuracy.

Its cold cutting nature preserves material properties while enabling complex geometries and tight tolerances.

As engineering manufacturing continues to demand higher precision across a broader range of materials, waterjet technology remains a reliable solution.

When applied correctly, it delivers accuracy, consistency, and confidence from design to final part.

Hassan Ahmed

Hassan graduated with a Master’s degree in Chemical Engineering from the University of Chester (UK). He currently works as a design engineering consultant for one of the largest engineering firms in the world along with being an associate member of the Institute of Chemical Engineers (IChemE).

The post How Advanced Waterjet Cutting Improves Material Precision in Engineering Manufacturing appeared first on Engineeringness.

Some memory manufacturers have predicted scaling 3D NAND to 1,000 layers within this decade, but the technologies and processes that got us from 2D to 3D, and from 64- to 232-layer 3D NAND are not capable of achieving such unprecedented scale. It will require Lam’s coolest technological breakthrough yet—pushing physics and chemistry to their limits, striving for higher storage capacities and data processing speeds never achieved before in solid-state drives (SSDs).

Building on two decades of leading-edge innovations in dielectric etch technology, Lam Research introduced Lam Cryo™ 3.0 to help overcome the most critical challenges in scaling production of AI-ready 3D NAND.

3D NAND flash involves stacking multiple layers of cells to achieve higher densities for increased data storage capacity and throughput—crucial for AI, Machine Learning and applications that require rapid data retrieval and processing. Creating such architectures involves almost unfathomable complexity for manufacturing at the atomic scale—1,000x smaller than the width of a human hair.

Etching material from the surface of a wafer to achieve desired patterns and memory cell structures is a critical process to enhance 3D NAND device performance, reliability and yield. So, the question of how to achieve higher aspect ratio (HAR) etching—at ever-greater depths and with more precision without compromising quality—has been a hot topic in the semiconductor industry for years.

For Lam, it was about cooling things down. Way down!

Delivering angstrom-level control of lateral and vertical feature profiles, Lam Cryo 3.0 leverages subzero processing temperatures to enable novel chemistries for etching memory channels of up to 10 microns in depth without compromising critical shape dimensions.

When it comes to etching, “memory channel precision” refers to creating vertical pathways in the memory stack that connect the cells, which is vital for scaling 3D NAND devices to higher layer counts. “Logic scaling” requires maintaining top-to-bottom dimensionality of the channels, which is essential for enabling each memory cell to store more bits and increase the performance and capacity of flash memory as it scales to more layers and taller stacks. And beyond this technical complexity for increasing performance and capacity, flash manufacturers must also decrease the operational costs per bit to achieve scale.

Lam’s pioneering efforts in etch and deposition technology over the decades have led to many significant breakthroughs in NAND flash manufacturing using our unique and proprietary technologies, including cryogenic memory channel etch. By lowering wafer temperatures during manufacturing, Lam can leverage novel process chemistries to enable more bits per cell for scaling devices to higher layer counts with deeper etches and greater uniformity than ever before.

Lam Cryo 3.0 represents a significant leap forward in cryogenic etching technology to transform 3D NAND chip manufacturing as it works to meet the demands of the AI era.

Lam played a leading role in the industry’s transition from planar to 3D NAND with its HAR etch solutions that deliver top-to-bottom feature precision. Since 2019, Lam has been the only company with production-proven cryogenic tools for manufacturing advanced NAND devices, boasting a worldwide customer install base of nearly 1,000 chambers used to process over five million wafers.

“Lam Cryo 3.0 cryogenic etch technology is a significant leap beyond conventional techniques,”

says Neil Shah, co-founder and vice president of research at Counterpoint Research.

“It etches memory channels that are more than 50 times deeper than their width with near perfect precision and control, achieving a profile deviation of less than 0.1%. This breakthrough significantly enhances advanced 3D NAND yields and overall performance, enabling chipmakers well in the AI era.”    

Lam’s cryogenic etch technology combines industry-leading high-power confined plasma reactors and pulsed plasma reactor technology with processing temperatures that can reach well below 0^oC. This enables new chemistries for HAR etches essential in scaling 3D NAND layer counts.

With these cryogenic etch innovations, Lam is enabling today’s leading flash memory manufacturers to achieve near-perfect etching profiles for higher throughput, greater efficiencies, and lower environmental impact needed to support next-generation applications. What’s more, manufacturers can scale 3D NAND laterally, vertically, and logically – increasing bit density and capacity from single-level cell (SLC) up to quad-level cell (QLC) for higher storage capacity, performance and energy efficiency.

What’s Cool about Lam Cryo?

With etch rates more than twice as fast as conventional dielectric etching, Lam’s cryogenic etch technologies enable cost-effective bit scaling for faster production and higher yield, with unmatched precision to repeatedly etch memory channels as deep as 10 microns with less than 0.1% deviation* of critical top-to-bottom dimensions. Not only can customers leverage Lam’s cryo-enabled tools while continuing to utilize previously installed etch systems, but the technologies also have the potential to reduce carbon footprints by using novel process gases (and their byproducts) that have a lower overall environmental impact. Furthermore, higher throughput results in lower overall system energy usage with an anticipated 40% reduction in energy consumption per wafer** and a 90% reduction in emissions***.

As we enter the AI age, reaching 1,000-layer 3D NAND represents more than just a technological aspiration; it symbolizes a new paradigm for the semiconductor industry as we work to meet the intensive data processing and storage demands of today and beyond. Lam Research is committed to leading this charge, providing cryogenic solutions and other innovations to help overcome the most critical technological, economic, and manufacturing operational challenges to usher in the AI era.  

Tae Won Kim is CVP of Global Products – Dielectric Etch at Lam Research

Tae Won Kim

Tae Won Kim is CVP of Global Products – Dielectric Etch at Lam Research

The post The Future of Flash Memory is Cooler than you Think appeared first on Engineeringness.

To learn more about Nuclear Reactors or just to get a good headstart on your education or to bolster your professional career, check out the following book which has been recommended by numerous industry professional and professors alike:

Different Types of Advanced Nuclear Reactors:

• Advanced Gas-cooled Reactors (AGRs),
• Pressurized Water Reactors (PWRs),
• Boiling Water Reactors (BWRs),
• Pressurised Heavy Water Reactors (PHWRs).

What Are Advanced Gas-cooled Reactors (AGRs) and How Do They Work? 

AGRs make use of carbon dioxide as a coolant and graphite as a moderator, thereby allowing them to operate at high temperatures, hence greater thermal efficiency, usually around 40%. This is because, unlike water, carbon dioxide is stable at high temperatures without causing phase change (e.g., boiling) under the conditions designed in AGRs. High operating temperatures allow a higher percentage of the heat generated by fission to be converted into mechanical and thus electrical energy therefore, higher thermal efficiency.

Graphite is an effective neutron moderator even at high temperature. Its characteristic moderation of the fast neutrons without a significant loss of moderating efficiency at high temperature makes it a highly suitable material for a reactor core where high-temperature operation is required such as AGRs.

This choice of coolant and moderator also allows a wider range of uranium fuels to be used. However the construction and maintenance of the said reactors is far more expensive compared to their counterparts due to the materials required for high-temperature operations. 

What Are Pressurized Water Reactors (PWRs) And How Do They Work?

Pressurized Water Reactors (PWRs) are one of the most widespread and most used types of nuclear reactors. They utilise water for two primary purposes: cooling the core of the reactor and moderating (slowing down) neutrons emitted during fission.

Within the reactor core, the uranium fuel undergoes nuclear fission, where the uranium atoms disintegrate and release heat. Heat is generated as fast neutrons are slowed down through collision in the water, which acts as a moderator. The moderated neutrons are more probable to trigger subsequent fission reactions, sustaining the chain reaction in a controlled manner.

The water circulated through the core serves a dual purpose. It removes the heat produced by fission, acting as a coolant, and slows down neutrons acting as a moderator. The pressuriser maintains pressure on the water. The high pressure, increases the boiling point of water, thus, preventing the water from boiling even at such temperatures as it reaches, allowing it to efficiently carry heat away from the reactor core.

After absorbing heat in the reactor core, the pressurised heated water travels through a heat exchanger known as the steam generator. In the steam generator, the heat from the primary water circuit is transferred to a separate water system. This secondary water is not under high pressure and is allowed to boil, creating steam.

The steam produced in the secondary loop is directed to turbines. As the steam expands and cools, it drives the turbine blades, which in turn rotates a generator. This mechanical energy conversion produces electricity. After passing through the turbine, the steam is usually condensed back into water and recirculated to be heated again, completing the cycle.

Overall, the design of a PWR; with its high-pressure primary water loop and a separate secondary steam cycle, provides a reliable and efficient means of harnessing nuclear energy while ensuring safety and operational stability.

What Is A Boiling Water Reactor (BWR) and How Does It Work?

A Boiling Water Reactor (BWR) works by placing uranium fuel assemblies within the reactor core, where nuclear fission generates both heat and fast neutrons. When these neutrons strike water molecules that are being circulated through the core, the water heats up and, at the same time, serves as a moderator, cooling the neutrons down enough to allow for a controlled chain reaction. Because the coolant water is allowed to boil when it comes into contact with the fuel, steam is produced directly in the reactor vessel; eliminating the need for a separate steam generator loop like in the PWRs.

Once produced, the steam flows directly from the reactor core to the turbine, causing its blades to spin and driving an electric generator. Upon exiting the turbine, the steam is channeled into a condenser, where it is cooled, condensed back to liquid, and pumped back into the reactor vessel to loop again. Internal recirculation variable speed motor pumps inside the reactor use the water flow rate through the core so that the boiling rate and hence the reactor’s power level can be adjusted by the operators without needing to shift control rods.

Control rods, made out of neutron-absorbing elements. Common types of material used to make the control rods are: Boron Carbide (B₄C) and Hafnium. The control rods are added from above to regulate the fission rate and provide for safe levels of reactivity. On a sudden decrease in pressure or water levels, a number of emergency core cooling systems can flood additional coolant into the system in order to prevent overheating. All this within a sturdy containment building designed to protect against the release of any radioactive material upon an accident occurring.

BWRs are relatively compact, since fewer mechanical and heat‑exchange loop elements are required. However, because the steam employed to drive the turbine is radioactive, rigorous water chemistry controls must be implemented to minimise corrosion and limit the formation of radioactive deposits. BWRs typically have thermal efficiencies of around 32–34%, with operating pressures of around 7 MPa and temperatures of around 285 °C. This combination of simple steam production and minimised circuitry makes BWRs cost-effective to build and simple to operate but still demanding fine control of materials and safety protocols.

How Is a BWR Different From a PWR Reactor?

Compared to the secondary loop PWRs, the steam that is generated in the BWR core is utilised to directly drive a turbine that is connected with a generator to produce electricity. The steam is thereafter condensed into water in a condenser and recycled back to the reactor core for reheating. Control rods, made of neutron-absorbing materials, are inserted into or withdrawn from the reactor core to control the rate of fission and, consequently, the quantity of steam produced. This direct cycle of heating water to produce steam in the reactor simplifies the design and operation of BWRs, without a separate steam generator and with a less cumbersome system.

Safety systems are in place to cool the reactor and contain radioactive materials in the event of an emergency, ensuring the safe operation of the reactor.

What Are PHWRs And How Do They Work ?

Pressurised Heavy Water Reactors (PHWRs) are characterised by their use of heavy water (D2O) for both cooling and moderating neutrons, enabling the efficient use of natural uranium as fuel. Heavy water has a much lower neutron‑absorption cross‑section. This means that when fast neutrons from fission collide with D₂O molecules, they are slowed (moderated) into the thermal energy range without being captured as readily as they would be in H₂O. Although heavy water behaves chemically like ordinary water, each molecule contains deuterium atoms (hydrogen isotopes with an extra neutron), making it about 11% denser.

This design allows for significant moderation of neutrons, increasing the probability of nuclear fission reactions without necessitating the enrichment of uranium. The heavy water circulates around the reactor core, collecting the heat caused by fission, and transfers it to a secondary water circuit via a heat exchanger, creating steam without direct contact between both circuits. The steam powers turbines that produce electricity, and the steam is afterwards condensed and recycled.

PHWRs are fueled with natural uranium dioxide pellets, which are contained in rods that are clustered together, and utilise control rods to regulate the fission rate and power. One of the distinctive advantages of PHWRs, particularly of the CANDU design, is that they have the capability for online refueling, i.e., they can be operated continuously without being shut down to replace the fuel. This operational flexibility, together with the possibility of using unenriched uranium, is what PHWRs provide economically despite the added cost and complexity of heavy water use.

Advantages and Disadvantages of Different Types of Nuclear Reactors

Hassan Ahmed

Hassan graduated with a Master’s degree in Chemical Engineering from the University of Chester (UK). He currently works as a design engineering consultant for one of the largest engineering firms in the world along with being an associate member of the Institute of Chemical Engineers (IChemE).

The post Exploring Nuclear Reactor Types | AGRs, PWRs, BWRs, and PHWRs Unveiled appeared first on Engineeringness.

What Is A Centrifugal Pump?

A centrifugal pump is a mechanical device designed to move fluids by converting rotational kinetic energy into hydrodynamic energy. It operates through the action of one or more driven rotors known as impellers, which increases the fluid’s velocity as it spins. Fluid enters the rotating impeller along it’s axis and is ejected by centrifugal force along it’s circumference through the impellers vane tips. This increased velocity is then converted into pressure, allowing the fluid to be transported through a piping system. Special design of the pump casing is such that the pump fluid is conveyed from pump inlet into impeller, then slowed and controlled before discharge.

These pumps are ideal for low-viscosity fluids such as water, fuel, or chemicals. However, their versatility makes them applicable in many industries, from agriculture to oil and gas.

For more information and a more indepth look into Centrifugal Pumps, check out this book for more information:

How Centrifugal Pumps Work

Centrifugal pump has an important component, known as the impeller. It is made from a series of curved vanes. They usually sandwich between two discs (an enclosed impeller). For slurry fluids an open or semi-open impeller backed by a single disc is preferred.

At the ‘eye’ of the impeller fluid goes in, and comes out around the vanes in the circumference. On the opposite side to the eye there is an impeller, which is connected to a motor and rotated at high speed (around 500-5000rpm) through a drive shaft. The fluid is thereby accelerated out through the impeller vanes into the pump casing at high rotational speed.

There are two basic designs of pump casing: volute and diffuser. We want a controlled discharge at pressure in both designs.

The impeller is situated in a volute casing, which acts to offset the impeller and in effect produce a curved funnel of increasing cross-sectional area to the pump outlet. This design leads to a pressure difference, increasing the pressure towards the outlet.

The same basic principle applies to diffuser designs. In this case, a set of stationary vanes surround the impeller with fluid being expelled between the two. Since diffuser designs can be tailored for particular applications, more efficient ones can be designed. When it is desirable to avoid the increased constrictions inherent in diffuser vanes, volute cases are more appropriate for applications with entrained solids or high viscosity fluids. Volutes of more than rectangular or square shape can cause the impeller to be worn and the drive shaft to wear more than equally.

Centrifugal pumps are constant head machines. They generate a fixed “head” (the height a fluid can be lifted) regardless of the fluid being pumped. The design and operation of a centrifugal pump are based on the relationship between the system curve (which defines the required flow and pressure) and the pump’s performance curve (which shows how the pump performs under various conditions).

A centrifugal pump is a mechanical device that, by means of an impeller driven at high speed by a prime mover, presses on the fluid to cause it to enter the pump casing and so move a fluid under pressure. The rapidly rotating impeller welcomes fluid along the axis and casts it out by centrifugal force along the circumference of the tip of the vane. The impeller action increases the fluid velocity and pressure as well as directs the fluid towards the pump outlet. The pump casing is specially configured to limit the fluid coming into the pump inlet, drive it into the impeller, and restrict on slowing and controlling the fluid before discharge.

Types of Centrifugal Pumps

Key Operational Characteristics of Centrifugal Pumps

Flow and Head Relationship

Unlike many other components, centrifugal pumps are designed for a specific combination of flow and head. Pumps run outside of their optimal design point (often known as their ‘best efficiency point’ or BEP’) decrease in efficiency and result in more component wear. This can be seen in Figure 3.

System Dependency

The system dictates the operating point of the pump, not the pump itself. If flow or pressure is not where it should be, either due to system or pump design, then it is not the pump but a problem with the system configuration or design which follows the system curve.

Efficiency Concerns

Pumps running away from their design point (e.g., higher flows or pressures than expected) will consume more power and exhibit lower efficiency. This can lead to early pump failure, cavitation, or even overheating.

Suction Conditions

Centrifugal pumps don’t “suck” fluid into the impeller. Instead, atmospheric pressure forces liquid into the pump. This is why adequate suction head or flooded suction is necessary, especially for higher elevation installations.

Pump Calculations | Finding the Right Size and Flow

An efficient and proper performing pump requires the proper selection and sizing of pump. According to the following formula, the essential parameters related to the centrifugal pump system can also be determined.

Pump Head Calculation

The total dynamic head (TDH) for a pump system is the total height (in meters or feet) that a pump needs to lift the liquid, including friction losses.

The general formula for calculating the head is:

Where:

• P_d – Discharge Pressure (Pa or Psi)
• P_s – Suction Pressure (Pa or Psi)
• λ – Specific weight of the fluid (N/m³or lb/ft³)
• g – Gravitational acceleration (9.81 m/s²)
• Z_d – Height at discharge (m)
• Zs – Height at suction (m)

Pump Head Calculator

This can be simplified to:

Where:

• Static Head is the vertical distance between the suction tank and the discharge point. (m)
• Friction Loss is the loss due to friction in the pipes and fittings. (m)
• Pressure Head is the pressure required at the discharge point. (m)

Total Dynamic Head Calculator

Flow Rate Calculation

To determine the flow rate needed for your application, use the following equation:

Where:

• Area is the cross-sectional area of the pipe (m²).
• Velocity is the speed of the fluid in the pipe (m/s).

It is important to note, that in many applications there is a range of velocity that is required for Certain pumping systems and piping networks. This is to reduce the chances of cavitation and also allow the liquid to move with enough velocity to reduce chances of settling if the fluid contains any solids.

Power Calculation

To calculate the power required for the pump, use this formula:

Where:

• Flow is in cubic meters per second (m³/s).
• Head is Height (m).
• Density is the fluid density in (kg/m³).
• Gravity is the acceleration due to gravity (9.81 m/s²).
• Efficiency is the pump efficiency (decimal).

Common Challenges in Centrifugal Pump Operation

1. Cavitation

Cavitation occurs when the pressure at the impeller’s inlet falls below the vapour pressure of the fluid. These bubbles, also called voids, collapse and cause shock waves that can damage the impeller, and reduce pump efficiency. Cavitation is a common cause of wear and tear in engineering, especially in pumps and propellers. 

2. Viscosity Handling

Centrifugal pumps are most effective with low-viscosity fluids. When dealing with higher viscosity fluids, pump performance decreases significantly, requiring adjustments to the design or a different pump type altogether.

3. Suction Lift Limitations

Most centrifugal pumps have limited suction lift capabilities. In cases where the fluid must be lifted from a lower level, a positive pressure or a flooded suction is required to maintain optimal operation.

Industrial systems can’t go without centrifugal pumps due to their simplicity, reliability and versatility. But choosing the pump that is right for your application requires understanding how all of that interplays: flow, head, system curves, and pump performance. By using the principles and formulas in this guide; you can optimise your pump system for efficiency and pump life.

Centrifugal pumps are fascinating devices for engineers and system designers due to their mix of design flexibility and operational stability. We hope this guide has helped you with knowledge and tools to make informed decisions when you’re considering your next centrifugal pump project.

Hassan Ahmed

Hassan graduated with a Master’s degree in Chemical Engineering from the University of Chester (UK). He currently works as a design engineering consultant for one of the largest engineering firms in the world along with being an associate member of the Institute of Chemical Engineers (IChemE).

The post The Ultimate Guide to Centrifugal Pumps: Types, Design, and Performance Calculation appeared first on Engineeringness.

Particle size distribution (PSD) refers to the range and amount of different-sized particles in a sample, such as powder, granular material, or particles in a solution. This distribution is typically expressed by mass or length, showing the relative amounts of particles according to their sizes.

In practice, there are very large variations in particle sizes and distributions within a very broad range of physical and chemical properties and morphological properties of particles. Such variations are defined approximately by particle size, for example, particles less than a certain size class are either called micronised or milli-sized, those of a larger size class are called nano-sized or milli-sized, and those of other size ranges may be called micro-sized or mega-sized, or the like. The composition of a mixture of all sizes is given by its particle size distribution.

Figure 1: An image to show particle sizes (Microtrac, 2024)

Why Is Particle Size Distribution so Important?

PSD is crucial in quality control and research applications across various industries, such as pigments, ceramics, minerals, and pharmaceuticals. It influences material properties like flow behaviour, reactivity, solubility, compressibility, and even taste. Accurate PSD analysis is essential for product performance, quality, and functionality.

The functional form of a particle size distribution is often specified in a combined plot, such as cumulative distribution graph (graph 1), which shows the percentage difference for the size of each particle in a sample and a frequency distribution graph (graph 2) which shows the percentage of a sample corresponds to a given diameter.

Graph 1: Cumulative Distribution (Process, 2020)

Graph 2: Frequency Distribution (Process, 2020)

The physical and biological properties of the particles within a sample can vary radically based on the sample’s particle size distribution. For instance, particle size analysis is used to characterise the nature and extent of the particulate matter or dust in the atmosphere. Particle size distributions can also develop into an important parameter in certain industries such as inorganic pigments, ceramics, minerals and pharmaceuticals.

Measuring Particle Size Distribution

There are numerous ways to measure a particulate sample’s size distribution, a common way is to use a light microscope.

Dynamic Light Scattering (DLS)

Figure 2: Dynamic Light Scattering (LS Instruments, 2024)

Dynamic Light Scattering (DLS) is a technique used to measure the size distribution of small particles, typically in the range of nanometers to micrometers, by analysing the fluctuations in the intensity of light scattered by particles in suspension. As particles move due to Brownian motion, these fluctuations provide information about their size. DLS is especially useful for characterising nanoparticles, emulsions, and other fine colloidal systems, offering a quick and non-invasive way to determine particle size based on their contribution to the overall scattering intensity.

Advantages of DLS

• Non-Invasive
  • DLS is a gentle method that doesn’t require altering or damaging the sample, making it ideal for delicate particles like proteins and nanoparticles.
• Quick and Efficient
  • The technique provides results quickly, often within minutes, making it suitable for rapid analysis in both research and industrial settings.
• Small Sample Size
  • DLS requires only a small amount of sample, which is beneficial when dealing with limited or expensive materials.
• Wide Size Range
  • DLS can measure particles ranging from a few nanometers up to a few micrometers, covering a broad range of applications.

Disadvantages of DLS

• Sensitivity to Large Particles
  • The presence of even a few large particles or aggregates can skew the results, as larger particles scatter much more light, dominating the measurement.
• Requires Clear Solutions
  • DLS works best with clear, dilute solutions. Any turbidity or high concentration can interfere with accurate measurements.
• Limited Information on Shape
  • DLS primarily provides information about particle size, not shape. Particles of different shapes but similar sizes may produce similar scattering patterns.
• Complex Data Interpretation 
  • The data analysis can be complex, requiring sophisticated software and expertise to accurately interpret the results.

Applications of DLS in Industry

Dynamic Light Scattering is widely used across various industries due to its ability to accurately measure small particles. Here are some key applications:

• Pharmaceuticals
  • DLS is used to analyse the size of drug particles and nanoparticles, which is critical for drug formulation, stability, and bioavailability.
• Biotechnology  
  • In biotechnology, DLS is employed to study proteins, antibodies, and other biological molecules. It helps in understanding their aggregation behaviour and stability, which is vital for developing therapeutics.
• Nanotechnology  
  • DLS is a fundamental tool in nanotechnology for characterising nanoparticles, liposomes, and other nanoscale materials. Understanding particle size distribution is crucial for optimising the properties and functionality of these materials.
• Food and Beverages 
  • The food industry uses DLS to study emulsions, such as those found in dressings and creams. It helps ensure product consistency and stability by monitoring particle sizes in suspensions.
• Cosmetics
  • DLS helps in the formulation of cosmetic products by analysing the size of particles in creams, lotions, and other emulsions. This ensures product smoothness and texture.
• Environmental Monitoring
  • DLS is used to measure particles in water and air, helping in the assessment of pollution levels and the effectiveness of filtration systems.

Laser Diffraction

Laser Diffraction is a widely used technique for measuring the size distribution of particles ranging from submicron to several millimetres in size. It works by passing a laser beam through a dispersed sample (either in liquid or air) and analysing the pattern of light scattered by the particles. The angle and intensity of the scattered light provide information about the size of the particles, with smaller particles scattering light at larger angles and larger particles scattering at smaller angles.

Figure 3: Particle size distribution laser diffraction (Shimadzu, 2020)

Advantages of Laser Diffraction

• Broad Size Range  
  • Laser Diffraction can measure particles across a wide size range, from nanometers to millimetres, making it versatile for many applications.
• Rapid Analysis  
  • The technique provides fast measurements, often in just a few seconds, allowing for high-throughput analysis in both research and industrial environments.
• High Reproducibility
  • Laser Diffraction offers consistent and repeatable results, making it reliable for quality control and production processes.
• Non-Destructive  
  • The method is non-invasive, meaning that the sample is not altered or damaged during measurement, which is beneficial for sensitive materials.
• Ease of Use 
  • Modern laser diffraction instruments are user-friendly, with automated sample handling and analysis, making them accessible to non-specialists.

Disadvantages of Laser Diffraction

• Assumption of Particle Shape  
  • Laser Diffraction typically assumes that particles are spherical, which can lead to inaccuracies when measuring irregularly shaped particles.
• Sample Preparation Requirements 
  • Proper dispersion of the sample is imperative. Bad dispersion can lead to agglomeration or incomplete separation of particles, affecting the accuracy of the measurement.
• Limited Sensitivity to Very Small Particles 
  • While effective over a wide range, Laser Diffraction may struggle to accurately measure very small nanoparticles, particularly those below 100 nanometers.
• Complexity in Data Interpretation 
  • The interpretation of scattering patterns can be complex, requiring sophisticated software and a good understanding of particle size distribution theory.

Applications of Laser Diffraction in Industry

Laser Diffraction is a critical tool in various industries due to its ability to quickly and accurately measure particle size distributions. Here are some key applications:

• Pharmaceuticals 
  • Laser Diffraction is used extensively to measure the size distribution of drug powders, which is essential for ensuring proper dosage, stability, and bioavailability in formulations.
• Cement and Construction Materials 
  • In the construction industry, Laser Diffraction helps determine the particle size distribution of cement and other materials, which affects the strength, setting time, and durability of the final product.
• Food Industry  
  • This technique is used to analyse the size of particles in food products such as flour, sugar, and emulsions, helping to control texture, consistency, and quality.
• Chemical Industry  
  • Laser Diffraction is employed to monitor the particle size of pigments, resins, and other chemicals, ensuring uniformity and consistency in production processes.
• Minerals and Mining 
  • The method is crucial in the mining industry for analysing ore particles, which helps in optimising grinding processes and improving mineral recovery rates.
• Cosmetics 
  • Laser Diffraction is used to characterise particles in cosmetic powders and creams, influencing the feel, spreadability, and appearance of the final product.
• Environmental Monitoring  
  • The technique is applied in environmental science to measure particulate matter in air and water, contributing to pollution monitoring and control.

Sedimentation (Centrifuge Particle Size Analyser – CPSA)

Sedimentation using a Centrifuge Particle Size Analyser (CPSA) is a technique employed to measure the size distribution of particles, typically those larger than a few micrometers. The method is based on the principle that particles in a liquid medium settle at different rates depending on their size, shape, and density. Mass determined by this method can be used to calculate the volume distribution statistic, and the volume distribution itself can be further used to calculate the true geometric mean of the particle size distribution.

Figure 4: CPS Disc Centrifuge (Instruments, 2020)

Advantages of Sedimentation (CPSA)

• High Precision for Larger Particles
  • CPSA is particularly effective for measuring larger particles (typically above 1 micron), providing high precision in size determination.
• Accurate Mass and Volume Distribution 
  • The technique provides detailed mass and volume-based size distributions, which are critical for many industrial applications where particle mass and volume impact product performance.
• Good for Polydisperse Samples  
  • CPSA is well-suited for analysing polydisperse systems (samples with a wide range of particle sizes), offering a clear view of the distribution across different size classes.
• Non-Destructive
  • Like other non-invasive methods, sedimentation does not alter the sample during analysis, preserving the integrity of the particles.

Disadvantages of Sedimentation (CPSA)

• Time-Consuming
  • The sedimentation process, even when accelerated by centrifugation, can be relatively slow compared to other particle sizing methods, making it less suitable for high-throughput applications.
• Limited to Larger Particles
  • CPSA is not effective for analysing very small particles (e.g., nanoparticles), as these particles may settle too slowly or not at all, making them difficult to measure accurately.
• Requires Proper Dispersion
  • Just like other particle sizing techniques, proper dispersion of the sample is crucial. Aggregation of particles can lead to inaccurate measurements.
• Influence of Particle Shape  
  • The settling rate can be influenced by the shape of the particles, potentially leading to errors if particles are not uniform in shape.

Applications of Sedimentation (CPSA) in Industry

Sedimentation using CPSA is utilised in various industries, particularly where the precise measurement of larger particles is essential. Here are some key applications:

• Pharmaceuticals  
  • In the pharmaceutical industry, CPSA is used to measure the size distribution of drug granules and excipients, which affects the dissolution rate, stability, and bioavailability of medications.
• Ceramics and Powders
  • The ceramics industry relies on CPSA to analyse the size of powder particles used in the production of ceramics. Accurate particle sizing helps in controlling the properties of the final product, such as density and strength.
• Minerals and Mining 
  • CPSA is employed in the mining industry to analyse the size distribution of mineral particles. This information is crucial for optimising processes like grinding and flotation, which impact the efficiency of mineral recovery.
• Pigments and Coatings  
  • The pigment and coatings industry uses CPSA to ensure that particle size distributions meet specific requirements, influencing colour intensity, dispersion stability, and coating smoothness.
• Construction Materials 
  • In the construction industry, CPSA helps in analysing materials like cement and aggregates, where particle size distribution affects the workability, strength, and durability of the final product.
• Environmental Science 
  • CPSA is used in environmental monitoring to measure sediment particles in water bodies, helping to assess pollution levels and the effectiveness of filtration systems.

Optical Sizing Analyser (OSA)

An alternative method to measure a sample’s size distribution can be the Optical Sizing Analyser (OSA). The Optical Sizing Analyser (OSA) is a particle size analysis technique that measures the size distribution of particles by analysing the light they scatter or absorb as they pass through a light beam. This method is based on the principles of light refraction and diffraction, and it is particularly effective for determining the size of particles suspended in a liquid or dispersed in a gas. The OSA can measure a wide range of particle sizes, making it a versatile tool in various industries.

Figure 5: Optical Sizing Analyser (Interlab, 2020)

Advantages of Optical Sizing Analyser (OSA)

• Non-Destructive  
  • OSA does not alter or damage the particles during analysis, preserving the sample’s integrity, which is especially important for delicate or expensive materials.
• Wide Size Range  
  • The OSA can measure particles across a broad range, from submicron to millimetre sizes, making it suitable for many different applications.
• High Sensitivity  
  • This technique is sensitive enough to detect small differences in particle size, providing detailed information about the distribution of sizes in a sample.
• Real-Time Analysis  
  • OSA can provide real-time measurements, which is beneficial for continuous monitoring in industrial processes and for immediate quality control.
• Versatile  
  • OSA can handle different types of samples, including liquids, gases, and dry powders, making it a versatile tool across various industries.

Disadvantages of Optical Sizing Analyser (OSA)

• Sample Preparation Requirements 
  • Proper sample preparation is critical to ensure accurate measurements. Poor dispersion or incorrect concentration can lead to inaccurate results.
• Assumption of Particle Shape  
  • OSA typically assumes that particles are spherical, which may lead to inaccuracies when measuring particles with irregular shapes.
• Cost  
  • The equipment and maintenance for OSA can be expensive, making it less accessible for smaller laboratories or industries with limited budgets.
• Complex Data Interpretation
  • The interpretation of results from an OSA can be complex, often requiring specialised software and expert knowledge to accurately analyse the data.

Applications of Optical Sizing Analyser (OSA) in Industry

The Optical Sizing Analyser is used in a variety of industries due to its ability to measure particle sizes accurately and efficiently. Here are some key applications:

• Pharmaceuticals 
  • OSA is used to determine the size distribution of particles in drug formulations, which affects the drug’s dissolution rate, bioavailability, and stability. This ensures that the pharmaceutical products meet the required standards for safety and efficacy.
• Food and Beverages  
  • In the food industry, OSA is employed to analyse particles in emulsions, suspensions, and powders, helping to control texture, consistency, and stability of products like sauces, dressings, and beverages.
• Cosmetics 
  • The cosmetics industry uses OSA to measure the size of particles in creams, lotions, and powders, which influences the product’s texture, application, and appearance on the skin.
• Chemicals and Polymers  
  • OSA is essential in the chemical industry for analysing the particle size distribution in pigments, polymers, and resins, which impacts the colour, dispersion, and overall quality of the final product.
• Environmental Monitoring  
  • OSA is used to measure particulate matter in air and water samples, contributing to environmental monitoring and pollution control efforts. It helps in assessing the effectiveness of filtration systems and the impact of pollutants.
• Mining and Minerals  
  • In the mining industry, OSA is used to analyse the size distribution of mineral particles, which is critical for optimising processes like grinding, sorting, and flotation, improving the efficiency and yield of mineral extraction.
• Paints and Coatings  
  • The size of particles in paints and coatings affects their application properties, such as smoothness, gloss, and drying time. OSA is used to ensure that the particle size distribution meets the desired specifications.

Sieve Analysis

Figure 6: Sieve Analysis (Particletechlabs, 2024)

Sieve Analysis is a classic and widely used technique for determining the particle size distribution of a granular material. This method involves passing a sample through a stack of sieves with progressively smaller mesh sizes, separating the particles into different size fractions. The mass of particles retained on each sieve is then measured, providing a straightforward way to quantify the distribution of particle sizes in the sample. Sieve Analysis is especially useful for larger particles, typically those above 45 micrometers.

Advantages of Sieve Analysis

• Simplicity and Accessibility
  • Sieve Analysis is a straightforward, easy-to-understand method that requires minimal training and can be performed with relatively inexpensive equipment, allowing it to be accessible to all areas of the world.
• Robustness  
  • The method is robust and can be used for a wide range of materials, including powders, granules, and aggregates, making it versatile across different industries.
• Direct Measurement  
  • Sieve Analysis provides a direct measurement of particle size distribution by physically separating particles, offering clear and tangible results.
• Wide Application Range  
  • It is applicable to a wide variety of materials, particularly those with larger particle sizes, such as soil, sand, cement, and other construction materials.
• No Assumption of Particle Shape  
  • Unlike some other methods, Sieve Analysis does not rely on assumptions about particle shape, making it effective for irregularly shaped particles.

Disadvantages of Sieve Analysis

• Limited Precision for Fine Particles  
  • Sieve Analysis is less effective for very fine particles (typically below 45 micrometers), as they may pass through the sieve meshes irregularly or agglomerate, leading to inaccurate results.
• Labor-Intensive  
  • The process can be labour-intensive, especially for large sample sizes or when multiple fractions are required. It also requires careful handling to avoid sample loss.
• Time-Consuming  
  • Depending on the sample and the number of sieves used, the process can be time-consuming, especially when compared to automated methods like laser diffraction.
• Potential for Sieve Wear 
  • The sieves themselves can wear out over time, particularly when working with abrasive materials, which can affect the accuracy of the results and necessitate regular maintenance and replacement.

Applications of Sieve Analysis in Industry

Sieve Analysis is employed across numerous industries due to its effectiveness in measuring particle size distribution in larger particles. Here are some key applications:

• Construction Materials
  • In the construction industry, Sieve Analysis is crucial for grading aggregates, sand, and cement. The particle size distribution impacts the strength, durability, and workability of concrete and asphalt mixtures.
• Mining and Minerals  
  • The mining industry uses Sieve Analysis to determine the particle size distribution of ores and minerals, which is essential for optimising the grinding process and improving mineral recovery.
• Agriculture 
  • Sieve Analysis is used to analyse soil composition, helping to determine soil texture, which affects water retention, aeration, and fertility.
• Food Industry
  • In the food industry, Sieve Analysis is used to ensure uniformity in particle size for products like flour, sugar, and spices, which is important for consistency in texture, taste, and processing behaviour.
• Pharmaceuticals  
  • Sieve Analysis is used to classify granules and powders, which is critical in ensuring consistent dosing, flowability, and compressibility in tablet formulation.
• Environmental Science  
  • Sieve Analysis is employed in environmental science to analyse soil and sediment samples, helping to assess erosion patterns, sediment transport, and soil fertility.
• Chemical Industry
  • The chemical industry uses Sieve Analysis to determine the particle size distribution of raw materials and finished products, which affects the reactivity, solubility, and quality of chemical formulations.

Dynamic Image Analysis (DIA)

Dynamic Image Analysis (DIA) is an advanced technique used to measure the size and shape distribution of particles by capturing and analysing high-speed images of particles as they flow through a detection area. Unlike traditional methods that only provide information on particle size, DIA offers detailed insights into the shape, aspect ratio, and morphology of particles, making it a powerful tool for comprehensive particle characterisation. This method is particularly useful for analysing particles ranging from a few micrometers to several millimetres in size.

Figure 7: Schematic diagram of Dynamic Image Analysis (DIA). A Sympatec QICPIC® was employed for 2D DIA analysis and a Microtrac PartAn3D® was employed for 3D DIA analysis (wp.nyu.edu, 2024)

Advantages of Dynamic Image Analysis (DIA)

• Detailed Particle Shape Information 
  • DIA provides not only particle size but also detailed shape characteristics, such as elongation, roundness, and aspect ratio, which are crucial for understanding the behaviour and functionality of particles.
• Real-Time Analysis  
  • DIA offers real-time data acquisition and analysis, allowing for immediate feedback during processing or quality control operations.
• Versatile Measurement Range  
  • DIA can measure a wide range of particle sizes, from a few micrometers to several millimetres, making it suitable for diverse applications across different industries.
• Non-Destructive 
  • The technique does not alter or damage the sample, preserving the integrity of the particles for further analysis or processing.
• High Throughput  
  • DIA can process a large number of particles quickly, making it ideal for high-throughput applications where large sample volumes need to be analysed rapidly.
• Comprehensive Data 
  • DIA provides comprehensive data on particle size distribution, shape, and morphology, enabling a deeper understanding of the sample’s characteristics.

Disadvantages of Dynamic Image Analysis (DIA)

• Complex Data Interpretation  
  • The amount of data generated by DIA, particularly regarding particle shape, can be complex to interpret and may require advanced software and expertise.
• Higher Cost  
  • DIA systems can be expensive, both in terms of initial investment and maintenance, potentially limiting their accessibility for smaller laboratories or industries.
• Sample Preparation Requirements  
  • Proper dispersion of the sample is essential to avoid overlapping particles, which can complicate image analysis and lead to inaccurate measurements.
• Limited for Extremely Fine Particles
  • While DIA is effective for a broad range of sizes, it may be less accurate for extremely fine particles, particularly those below a few micrometers.

Applications of Dynamic Image Analysis (DIA) in Industry

Dynamic Image Analysis is used across various industries due to its ability to provide detailed and comprehensive particle characterisation. Here are some key applications:

• Pharmaceuticals
  • In the pharmaceutical industry, DIA is used to analyse the size and shape of granules, powders, and crystals, which are critical for ensuring consistent drug formulation, dissolution rates, and bioavailability.
• Mining and Minerals 
  • The mining industry employs DIA to characterise ore particles, helping to optimise grinding and separation processes, which enhances mineral recovery and processing efficiency.
• Food and Beverages  
  • DIA is used in the food industry to analyse particles in products such as flour, sugar, and emulsions. Understanding particle size and shape helps control texture, consistency, and product stability.
• Cosmetics  
  • The cosmetics industry uses DIA to measure and analyse particles in powders, creams, and lotions. The size and shape of particles impact the texture, application, and appearance of cosmetic products.
• Chemicals and Polymers  
  • In the chemical industry, DIA is employed to analyse the particle size and shape of raw materials and finished products, which affects the flow properties, reactivity, and quality of chemical formulations.
• Construction Materials  
  • DIA is used to analyse aggregates, cement, and other construction materials. The particle size and shape distribution influence the strength, durability, and workability of concrete and other building materials.
• Environmental Science  
  • DIA is applied in environmental science to analyse soil, sediment, and particulate matter in air and water samples. It helps assess pollution levels, sediment transport, and soil fertility.

Why Measure PSD?

The ability to measure particle size distributions is critical to the many different industries and applications. Although there are many ways to adequately find this data, each involving different costs, some are more efficient than others. Usually, through a complex method involving laser diffraction, the particle size distribution can be got from one pellet. This pellet is usually made up of 2000 samples of 50 particles each. A simpler, but much more expensive, the method is to use the OSA. The sedimentation method is the quickest and most accurate way to obtain the size distribution of a sample.

As previously mentioned, particle size distribution is a very important aspect in almost every industry and is a representation of how one specific sample differs from others in terms of particle sizes. This is important in knowing how to select the correct particles for a specific function. For instance, in pharmaceuticals having the particles of a certain size is important when it comes to the performance and appropriateness of drug formulation.

Key Parameters from PSD Analysis

• Percentiles (d10, d50, d90)  
  • These values indicate the size below which 10%, 50%, or 90% of the particles fall. They are crucial for understanding the spread of particle sizes within a sample.
• Mean Particle Size
  • Calculated by averaging the sizes within each measurement class, weighted by the quantity in each class.
• Distribution Width  
  • The spread of particle sizes, often expressed as standard deviation or span value (d90 – d10) / d50.
• Mode Size  
  • The most frequently occurring particle size in the distribution.
• Monomodal vs. Bimodal Distributions 
  • A monomodal distribution has a single peak, while bimodal (or multimodal) distributions have multiple peaks, indicating different dominant particle sizes.
• Oversize and Undersize Particles
  • These are particles significantly larger or smaller than the bulk of the sample, often identified by steps in the cumulative curve or additional peaks in the density distribution.

References

Instruments, C. (2020). CPS Disc Centrifuge. Retrieved from CPS Instruments Europe: http://www.cpsinstruments.eu/pdf/General%20Brochure.pdf

Interlab. (2020). Optical Spectrum Analyzer. Retrieved from Interlab: https://www.interlab.pl/en/product/optical-spectrum-analyzer.html

LS Instruments. (2024). Dynamic Light Scattering (DLS). Retrieved from LS Instruments: https://lsinstruments.ch/en/theory/dynamic-light-scattering-dls/introduction

Microtrac. (2024). Analysis of Particle Size Distribution. Retrieved from Microtrac: https://www.microtrac.com/knowledge/particle-size-distribution/

Particletechlabs. (2024). Sieve Analysis. Retrieved from Particletechlabs: https://particletechlabs.com/wp-content/uploads/2022/10/Sieve_Analysis.jpg

Process, P. (2020). Particle Size Distribution (PSD). Retrieved from Powder Process: https://www.powderprocess.net/psd.html

Shimadzu. (2020). Particle Size Distribution Calculation Method. Retrieved from Shimadzu: https://www.shimadzu.com/an/powder/support/practice/p01/lesson22.html

WP.NYU.EDU. (2024). Dynamic Image Analysis. Retrieved from WP NYU EDU: https://wp.nyu.edu/dia/

Dr. Adam Zaidi

Dr. Adam Zaidi, PhD, is a researcher at The University of Manchester (UK). His doctoral research focuses on reducing carbon dioxide emissions in hydrogen production processes. Adam’s expertise includes process scale-up and material development.’

The post Understanding Everything That Is Particle Size Distribution (PSD) appeared first on Engineeringness.

The four different technologies outlined within this report are as follows:

• PyrEng: is the fast pyrolysis (fluidised bed) with compression-ignition engine, including intermediate liquids storage.
• GasEng: atmospheric gasification (fluidised bed) with spark ignition engine, including Tar cracker and gas clean up.
• Integrated Gasification Combined Cycle or IGCC: Pressurized gasification (fluidised bed) with gas turbine combined cycle, including hot as clean up.
• Combust: Combustion (moving grate) with boiler and Rankine cycle.

What Are Biomass Systems and What Advantages do They Have Over Conventional Fuels?

Biomass systems are an alternative to conventional fossil fuels as energy sources. They have multiple benefits over conventional fuels such as the increased scarcity of fossil fuels as well as being less environmentally damaging.

The other advantages come with the introduction of pellets in the early 2000’s. Pellets have high energy densities. They can be easily fed within heating systems.

Increasing government regulation and legislation requiring companies to reduce and even meet targets on greenhouse gas emissions coupled with increasing knowledge and information affecting public opinions on companies have led to better Press for companies who are opting to ‘go green’.

This has led to a large increase in the popularity, use and development of biomass systems by companies as a viable long term option over fossil fuels as energy sources (ATech Electronics, 2019). For example in 2019 there are around 3800 active biomass power plants worldwide with an expected 5600 commissioned by the end of 2027 (ecoprog, 2019).

Methodology

The overall efficiency is the annual net electricity delivered from the plant to the grid

Measured as a percentage and can be calculated using Equation 1.11 below:

Equation 1.11 Equation to determine the overall efficiency of the plant used for each biomass system.

The specified range of rated power is split into 10 ranges. Rated power can be defined as the net power exported by the power plant if it is running at full load.

For each of the rated power ranges an initial biomass wet feed (m_B) is assumed which then allows the chemical energy in (E_c) to be calculated using the Heating value (H), which is of the biomass as shown in equation 1.12:

Equation 1.12 Equation to calculate the chemical energy in of the plant for each biomass system.

Once the chemical energy in has been determined the electrical energy out (E_E) can be calculated using the chemical energy in (E_c) and the overall electrical efficiency (_e) as shown in equation 1.13 below:

Equation 1.13 Equation to calculate the electrical energy out of the plant for each biomass system.

Conversion Efficiency is defined as efficiency in converting the raw biomass material energy to energy within the intermediary product for example with the PyrEng the energy this means the pyrolyser to the bio oil intermediary bio oil liquid storage. This Is calculated by using a function of the given values.

Generation efficiency is defined as the efficiency with which the conversion of energy within the intermediary product is converted into electrical energy which can be used and transported to the grid. This is also calculated by using a function of the given values.

Rated power (P_E) for each scenario and system can then be worked out using the electrical energy out (E_E) as seen in equation 1.14 below:

Equation 1.14 Equation to calculate the Rated power for each biomass system.

Capacity factor is calculated using equation 1.15:

Equation 1.15 Equation to calculate capacity factor used in the calculation for equation 1.14.

Once the above has been worked out for each biomass systems and each of its 4 scenarios the economic measures can be calculated.

The specific capital costs (SCC) consist of four different elements known as preparation, drying, conversion and generation.

SCC can be worked out using equation 1.16 shown below:

Equation 1.16 equation to calculate the specific capital costs at each rated power range for each biomass system.

Cost of Electricity (CoE) is then worked out following the determination of the specific capital costs (SCC) and can be calculated using the equations 1.17:

Equation 1.17 equation to determine the cost of electricity at each rated power range for each biomass system.

The total of all system annual operating costs consist of seven elements known as feed production, feed transport, labour, utilities, overheads, maintenance, and annual cost of capital.

Feed preparation includes the reception, handling, screening, grinding and storage.

Overheads are a percentage of the total capital cost.

Feed production is calculated using equation 1.18 below:

Equation 1.18 equation to calculate the feed production costs per year.

When calculating the feed production cost, it is done on a dry basis. The feed rate is given as a wet basis. Wet basis is defined as the mass of moisture divided by the total mass on the product. To gain the dry basis mass the wet basis mass is divided by 2 as an assumption is made that the product is 50% wet basis.

Annual capital costs are the annual cost equivalent spread over the lifetime of the process. As stated above annual cost of capital (ACC) is used in the calculation to determine the sum of annual operating costs and can be evaluated using equation 1.19:

Equation 1.19 equation to calculate the annual capital costs included in the operating costs per annum outlined in equation 1.17.

Learning factors are the reflection in the learning process of new plants and can be defined as the amount capital cost reduces every time the number of plants in operation doubles.

The learning factors can be factored into calculation using equation 1.20 below:

Equation 1.20 equation to calculate the new capital cost including the learning factor.

Wherever a biomass system is described as ‘mature’ the learning factor, l, is set to 0.

Data Analysis & Discussion on 4 Biomass To Energy Systems

Graph 1.11 Graph to show the overall efficiency compared to the rated power.

Graph 1.11 above compares the overall efficiency (%) between all four systems over the rated power range (MWe).

The Most Efficient Biomass System

IGCC is the most efficient of all the biomass systems over all the rated power ranges. For example, at a rated Power range of 5 MWe the IGCC had an overall efficiency of 0.36% compared to the second-highest of 0.28% for GasEng followed by PyrEng at 0.25% and lastly the Combust at 0.18%. This trend does not change over the rated power range.

How Does an IGCC Biomass System Work?

The IGCC system works by utilising gasification followed by the use of gas clean-up and lastly a gas and steam turbine to create a combined system to allow for a more environmentally friendly, efficient and clean way of creating electricity especially compared to classic combustion systems as seen in graph 1.11 above (Wang, 2016).

How Does an Gasification Biomass System Work?

Gasification is the process in which carbon-based material such as biomass is turned into fuel/ energy without the use of combustion. This is done by incomplete combustion of the biomass feed in an oxygen-deficient area. This leads to less heat being released as compared to a combustion method as gasification packs energy into the bonds whereas combustion releases the energy from the bonds by oxidizing the feed giving off heat (Basu, 2010).

In the gasification process, syngas and ash amongst other intermediary products are converted into a gas.

Once the Gasification process is done gas is cleaned up by removing contaminants including CO_2, if carbon capture is used before the fuel is combusted, in the gas turbine phase meaning there is greater heating value in the combustion of the fuel as compared to combustion biomass systems. Moreover, it also leads to less harmful and polluting gases such as mercury and sulphur being combusted with sulphur being one of the lead causes of acid rain. Due to IGCC plants being run at high pressure the efficiency of the removal of the contaminants increases with the capital costs being reduced due to the lower volumetric flow rate of the pre combusted fuel as compared to cleaning the gas at ambient temperature post combustion at a higher volumetric flow rate. This also contains more gases as compared to just fuel which is pre combusted (Wang, 2016).

Figure 1.11 Diagram demonstrating the IGCC biomass system (Mitsubishi Hitachi Power Systems, 2019).

How Does a Rakine Biomass System Work?

Combust is the oldest of the four systems and the least efficient. Combustion systems such as the Rankine System work by utilizing an external heat source such as the combustion of biomass material to provide heat to a closed system containing an operating fluid.

A pump is used to pump high pressurized operating liquid into a boiler where it is heated using the external heat source, in this case combusted biomass material, where the operating liquid undergoes Isobaric heat transfer reaching its saturation temperature and further heated until it evaporates and is fully converted into saturated steam.

This saturated steam then travels to the turbine upstream of the boiler within the closed system and here it undergoes isentropic expansion. The saturated steam here expands, working on the surroundings producing electricity by spinning the turbine. This expansion, however, is limited by factors such as the temperature of the cooling medium, erosion of the turbine blades and the liquid entrainment when the medium reaches a two-phase region which all affect its efficiency.

This vapour liquid mixture leaves the turbine undergoing isobaric heat rejection in which the vapour liquid mixture enters a surface condenser. Here it is cooled and condensed using a cooling medium such as cooling water.

This condensed liquid is then recycled and sent back to the pump at the beginning where it begins the cycle once again (Muller-Steinhagen, 2011).  NOx exhaust must be controlled more in combust than other systems.

There are though, inefficiencies in the combust process such as the inefficiencies of the boiler. The boiler does not convert 100% of the fuel energy into steam energy due to the high temperature difference between the combusting fuel and the vapour temperature. This high-temperature difference leads to greater entropy leading to greater energy dispersion which, compared to the IGCC system which does not fully combust its fuel, has less energy lost between the gas turbine and the incompletely combusted fuel (Muller-Steinhagen, 2011).

Moreover, there are losses of energy through the turbine due to a number of reasons such as erosion of the turbine blades and as the steam cools vapour entrainment occurs (Muller-Steinhagen, 2011). Vapour entrainment is when liquid droplets are trapped within vapour. This can cause mechanical damage to turbine blades as well as reducing the efficiency of separation in the evaporation stage (R K BAGUL, 2013). Furthermore, the build-up of dirt/fouling reduces the efficiency of the condensing within the condenser (Muller-Steinhagen, 2011).

Figure 1.12 Diagram to show the Rankine Cycle and example of combust (Muller-Steinhagen, 2011).

How Does a Pyrolysis Biomass System Work?

Fast Pyrolysis is used in the PyrEng biomass system. Fast pyrolysis involves the thermal decomposition of carbon-based material in this case biomass in the absence of oxygen at low pressure and around 500^oC. This results in the biomass being vaporized leaving a residue of char and ash. This fast pyrolysis in the PyrEng system produces bio oil as an intermediary liquid which can be compressed and ignited as it is an energy-dense liquid feedstock that can be utilized within a compression engine and used as a fuel to produce electricity (A.V. Bridgwater, 2002).

How Is Bio-Oil Created?

The bio-oil is created by first drying the feedstock making sure most of the moisture is released. It is then heated to further release moisture and some gas and char. This is done around 100 – 300^oC. The biomass is then cooled to form ash, char, permanent gases and the desired bio-oil intermediary liquid. The remaining vapours are further vaporized at a temperature above 600^oC to become secondary char and more permanent gases.

Bio-Oil Disadvantages

However, bio-oil if stored for too long can start to separate out into different phases. Moreover, it can become increasingly thick leading to complications in use as a fuel for compression engines. To combat the separation bio-oil must be kept in storage conditions with less than 30% water content to stop the bio-oil mixture from separating from an aqueous phase and a gummy-like phase as seen in figure 1.13. Furthermore, bio-oil can age leading to a change in properties reducing usability. To protect against ageing, it is important to keep low temperatures and reduce sheer stress and both can lead to accelerated ageing. This leads to storage, handling and transportation differences compared to other biomass systems.

Figure 1.13 liquid oil phase (left) and gummy oil phase (right) of bio-oil after 9 months storage leading to complete phase separation (Jiajia Meng, 2015).

Bio-oil can be treated and co-fed into existing fossil fuel systems such as crude oil refineries. This means it can be used to curb the heavy reliance on crude oil. This is done by deoxygenating the bio-oil to create a more hydrocarbon like substance with low oxygen composition.

Figure 1.14 Diagram to show the process of converting biomass into bio-oil via fast pyrolysis in the PyrEng biomass system (Zafar, 2018).

GasEng is a form of atmospheric gasification whereby biomass is converted into syngas as well as tar and ash. These products are the cleaned via a gas clean-up where pure syngas is retained as an intermediate process gas, ash and tar are removed.

Particulates can be removed by the action of a few techniques such as filters, wet scrubbers and cyclones. Tar is any component with a molecular weight of 78 or higher. They are primary or secondary organic compounds. Tar is made up of mostly aromatic hydrocarbon which condense within engines and can cause tar build-up and deposits damaging components and reducing efficiency. The Tar is removed by primary or secondary tar removal.

Primary Tar removal is done in-situ via changing gasification operating and design conditions to reduce tar production and by adding catalysts as well as using different fluidised bed materials to convert tar into other products.

Secondary tar removal is when tar is reduced. This can be done by physically cleaning the tar by condensing tar and using scrubber/ filters. Another form of secondary tar removal is by cracking. Cracking is done by converting the tar into smaller molecules such as H₂ or CO e.g. within modern cars with a catalytic converter. Once the Tar and particulates are removed, the gas is cleaned and sent to a spark engine where it can be combusted to form energy and electricity.

Figure 1.15 Diagram to show the process of converting biomass into syngas via the gasification method within the GasEng biomass system (Waste 2 Energy World, 2019).

Graph 1.12 Graph to show specific capital costs compared to rated power for Scenario 1, Feed cost £30 per oven-dry tonne and 0% Learning Factor.

Graph 1.12 shows that IGCC has the highest specific capital costs over every rated power over the range out of the 4 different biomass systems. Starting at £6043.35k at 2.5MWe and ending at 25MWe with a specific capital cost of £3551.23k. Compared to the prices of the others such as GasEng at 2.5MWe has a specific capital cost of £4708.00k lowering to £2357.91k at 25MWe, PyrEng at 2.5MWe with a specific capital cost of £3467.02k lowering to £1814.19k at 25MWe and finally combust with a specific capital cost of £3089.43k at 2.5MWe lowering to £1412.36k at 25MWe.

IGCC is relatively new so the technology required to start and produce IGCC biomass systems is more expensive than old systems that have been mass-produced and in circulation for many years, allowing for second-hand systems to become cheaper adhering to the basic economic principles of supply and demand. The lower the supply, the scarcer and therefore the higher the cost for specialist equipment as it does not utilize economies of scale.

Moreover, as you can see in Table 1.11 the conversion costs for IGCC at £7170k are much higher than the other 3 biomass systems with PyrEng having £3460k, GasEng at £5220k and Combust having £1930k. This is down to the increased equipment required for IGCC compared to other biomass systems. The majority of the increased cost can be attributed to the gas clean up section of the IGCC method as this requires more equipment in the middle of the conversion process than other methods which do not have a complex gas clean up section involved.

Table 1.11 Table to show the Current Capital costs for IGCC.

Table 1.12 Table to show the Current Capital costs for GasEng.

The second highest specific capital cost over every rated power range is GasEng with a conversion cost of £5220k as seen in Table 1.12. This is similar to IGCC as they are both forms of gasification. Gasification again has higher specific capital costs compared to pyrolysis and complete combustion due to the higher number of specific capital equipment involved in the conversion of biomass feed to electricity through the formation of syngas. This is because to retrieve pure syngas, equipment such as carbon capture, scrubbers and filters are required to remove impurities and other undesirable products.

Graph 1.13 Graph to show the specific capital cost compared to rated power for scenario 2, £30 feed cost per oven-dry tonne and 20% learning factor.

The Learning factor can be described as acquiring new knowledge and information about specific processes. In this case, as time passes more innovation and technological advances occur therefore, increasing the efficiencies of equipment and reducing the cost allowing for equipment to age, lower production costs as well as a growing second hand market allowing for cheaper prices.

Graph 1.13 shows that the IGCC has the highest specific capital cost over the whole rated power range as stated before due to the higher capital costs involved in purchasing the capital equipment required in the conversion process due to the gas clean up section. For example, at 2.5MWe the IGCC has a specific capital cost of £3500.56k, combust is £3089.43k, GasEng is £2728.26k and finally PyrEng is £2148.10k compare this to the end of the rated power range at 25MWe the IGCC stays the highest at £1633.41k, the GasEng increases to the second highest specific capital cost with £1506.52k with combust just below with £1412.36k and PyrEng stays with the lowest specific capital cost at £1245.64k.

There is no change in the combust compared to graph 1.12 as combust is mature therefore, no learning factor as it is old and well developed with large amounts of accessible data. Moreover, due to its reliance on unsustainable energy sources and less clean nature compared to other biomass systems there is no need or desire to increase the innovation within combust biomass systems.

GasEng starts with a lower specific capital cost than combust at £2728.26k. However, this increases making the specific capital cost higher than that of combust at around 15MWe meaning by the end of the rated power range GasEng has a higher specific capital cost of £1506.52k compared to that of combust at £1412.36k.

PyrEng has the lowest specific capital cost compared to the other biomass systems as there is greater learning in areas such as preparation as seen in table 1.13. This is because there is greater interest and large scale developments are being carried out on pyrolysis with the use of diesel engines as compared to the use of gas turbine using fast pyrolysis (A.V. Bridgwater, 2002).

Table 1.13 Table to show learning factors for each biomass system in each different capital cost sections.

Scenario 3, £50 feed cost per oven-dry tonne and 20% learning factor as well as Scenario 4, £10 feed cost per oven-dry tonne and 20% learning factor also had graphs produced. However, these graphs are identical to graph 1.13 due to no learning factor difference which directly affects the specific capital costs, rather, the feed cost changes. Feed cost is an element of operating costs and not capital costs therefore; it does not affect the graphs comparing specific capital costs to rated power as it does not contribute to either.

Moreover, PyrEng is the only biomass system that has not got a mature preparation stage. This is because PyrEng preparation of biomass feed must be done with very high temperatures of above 1000^oCs^-1 with a low feed moisture content of 10% or less and a particle size of 1-2mm unlike the 3 other biomass systems which use conventional feed preparation. For example, the use of an updraft gasifier in the gasification processes involved in IGCC and GasEng can tolerate a feed with a much higher moisture content with as much as 50% MC of feed without the need to have a separate drying like in PyrEng. Moreover, a larger particle size can also be used of around 10-100mm as compared to 1-2mm of PyrEng.

Graph 1.14 Graph to show the cost of electricity compared to rated power for Scenario 1, Feed cost £30 per oven-dry tonne and 0% Learning Factor.

Graph 1.14 shows that the cost of electricity at 2.5MWe at the beginning of the rated power range is cheapest for combust with a price of £0.12kWh and most expensive for IGCC at £0.18kWh. This Can be attributed to the higher number of capital equipment required in the IGCC process in the forms of gas clean-up. By the end of the rated power range GasEng has the highest price of electricity with £0.10kWh with the lowest being Combust again with a price of £0.07kWh. PyrEng overtakes IGCC by 20MWe for the second most expensive for cost of electricity.

Graph 1.15 Graph to show the cost of electricity compared to rated power for Scenario 2, Feed cost £30 per oven-dry tonne and 20% Learning Factor.

Graph 1.15 shows that the cost of electricity at 2.5MWe at the beginning of the rated power range is cheapest for PyrEng with a price of £0.10kWh and most expensive for IGCC at £0.12kWh. By the end of the rated power range GasEng has the highest price of electricity with £0.08kWh with the lowest being IGCC with a price of £0.07kWh. PyrEng overtakes Combust by 12.5MWe for the second most expensive for cost of electricity.

Graph 1.16 shows that the cost of electricity at 2.5MWe at the beginning of the rated power range is cheapest for PyrEng with a price of £0.12kWh and most expensive for Combust at £0.14kWh. By the end of the rated power range GasEng has the highest price of electricity with £0.09kWh with the lowest being IGCC with a price of £0.08kWh. PyrEng overtakes Combust by 15MWe for the second most expensive for cost of electricity.

Graph 1.16 Graph to show the cost of electricity compared to rated power for Scenario 3, Feed cost £50 per oven-dry tonne and 20% Learning Factor.

Graph 1.17 shows that the cost of electricity at 2.5MWe at the beginning of the rated power range is cheapest for PyrEng with a price of £0.09kWh and most expensive for IGCC at £0.11kWh. By the end of the rated power range GasEng has the highest price of electricity with £0.07kWh with the lowest being combust with a price of £0.05kWh. PyrEng overtakes Combust by 17.5MWe for the second most expensive for cost of electricity.

Graph 1.17 Graph to show the cost of electricity compared to rated power for Scenario 4, Feed cost £10 per oven-dry tonne and 20% Learning Factor.

The utility cost for IGCC is the highest at £54.7k y^-1 compared to £36.9k y^-1 for PyrEng, £49.3k y^-1 for GasEng and -£27.2k y^-1. This can be attributed to the greater number of equipment required for gasification processes that are within IGCC and GasEng thus costing more in utilities. Furthermore, the labour cost is also higher in IGCC at £651 man days y^-1 compared to £423 man days y^-1 for the other 3 biomass systems. This could be due to the pressurized system involved in the IGCC process leading to greater control and safety precautions requiring a greater number of operators and more staff for safety on site. Maintenance is also highest for IGCC with £105.0k y^-1 compared to -£11.1k y^-1 combust, £22.1k y^-1 for PyrEng and £53.6k y^-1 for GasEng. Again this can be attributed to the higher number of equipment required for gasification process involved in GasEng and IGCC.

For the operating costs, feed transport stays consistent due to the same method used across all 4 biomass systems. Another factor as to why there is a difference in operating and capital costs can be attributed to the different types of reactors used for each biomass system.

What Is A Moving Grate System?

Within Moving grate systems, the biomass is fed onto the moving grate via gravity. The biomass is then dried initially as the moving grate bed moves after which it is ignited, burned and cooled whereby the ash is removed. The moving grate operating temperatures are around 800-1000^oc (European Biomass Industry Association, 2019).

Figure 1.16 Diagram to show a moving grate combustor (European Biomass Industry Association, 2019)

There are two types of fluidised bed reactors, a moving fluidised bed reactor and a fixed fluidised bed reactor. Fluidised bed reactors burn biomass material within a hot bed of granular material for example, sand which is kept hot by a primary air feed keeping it molten with a second air stream above to achieve complete combustion. Fluidised beds operate at around 750-950^oC.

Figure 1.17 Diagram to show a circulating fluidised bed (moving fluidised bed) (European Biomass Industry Association, 2019)

Due to the increased compactness of the fluidised bed reactor compared to the moving grate combustor coupled with less use of excess air with around 40% compared to an excess air amount of 80-90% for moving grate, the fluidised bed has a lower capital and operating cost. Moreover, a more efficient burning leads to a lower bottom ash amount of 16% compared to 22% for moving grate meaning that it requires less maintenance, produces cleaner products therefore, less cleaning required after the process (Morin, 2014).

Pyrolysis has a cheaper utility cost than the gasification process with £35.9k y^-1 as compared to the gasification processes with IGCC having a utility cost of £54.7k y^-1and GasEng with a utilities cost of £49.3k y^-1 due to the fact pyrolysis utilizes gas recycling unlike the gasification process.

Many assumptions were made during the calculation for example 50% wet basis which when analysed against the biomass systems is much higher than required for IGCC and GasEng and much less than pyrolysis within PyrEng.

Alternative Sources of Energy Production Analysis

There are many alternatives sources of energy like renewable sources such as solar, wind and thermal amongst others. Moreover, comparisons can also be made with conventional sources of energy such as coal and natural gas. For example in the year 2007 49% of total US power generation was via the use of coal as an energy source followed by natural gas at 21% (Kaplan, 2008). This is mainly due to the cheap nature of coal feed coupled with the greater energy production involved in the burning of coal as shown with the published values. Values online state that compared to a natural gas combined cycle power plant as a base rate, IGCC is 34% more expensive (Kaplan, 2008). Moreover, using natural gas with an energy density of 23,00 MJ m^-3 as compared to 30% moisture content wood chip with an energy density of 3,100MJ m^{-3  (Forest Research, 2019)} shows that there is a long way for IGCC and biomass methods to progress until it is a viable mass scale option to replace the use of non-renewable fossil fuel methods such as natural gas.

Renewable methods such as solar and wind are also viable alternatives with both having free sources of energy. However, they are intermittent sources of energy and rely heavily on uncontrollable conditions such as degree of sunshine and level of wind respectively. In 2014 over a seven-day period in Arizona with variable cloud coverage, solar energy only managed an average of 25% of rated power output. Moreover, the combined total of all wind turbines contributing to the UK national grid only managed 32.5% average output over a 1 month period also showing major fluctuations in power (VIASPACE, 2019).

Nuclear is also an alternative and popular source of energy. It is cheaper than IGCC in scenario 4 with the cheapest feed cost and learning factor of 20% which achieved an electricity cost price of £0.11 kWh compared to nuclear which has a electricity cost price of £0.09 kWh (DeRosa, 2015). However, nuclear energy has greater build time compared to other energy sources as well as having greater complexity, initial cost price and although they do not produce greenhouse gases there is a compromise due to its highly radioactive nature.

Conclusion

In conclusion, IGCC is seen as the most viable long term Biomass system of the four systems reviewed in this report. It has the cheapest electricity cost at the lowest feed cost other than combust and also due to the gas clean-up section can be seen to be the most environmentally friendly of the biomass systems discussed. However, research and development must carry on in order for IGCC to be a substitute for conventional fossil fuel methods such as natural gas and coal.

Biomass is a growing industry and more research and development is continuously taking place with many more project scheduled to be commissioned and designed in the future. However, more incentives must be introduced to allow private companies to invest more time and effort into biomass for it to be a serious long term and mass scale alternative to conventional energy producing methods. For this to occur key issues must be made aware to the public through education so that social movements and a growing pressure can lead to change especially in emerging economies such as china and India. Furthermore, government regulation, legislations and taxing as well as potential subsidies could also provide more incentives for private companies to invest in long term mass based research and development studies. Steps taken such as the Paris agreement where emerging economies are being made aware of the damage their growth and increased energy requirement is causing are steps in the right direction and it is tantamount that initiatives like these carry on.

References

A.V. Bridgwater, A. T. (2002). A techno-economic comparison of power production by biomass fast pyrolysis with gasification and combustion. Elsevier.

ATech Electronics. (2019). Biomass combustion. Retrieved from Fumis: http://www.fumis.si/en/about-biomass-combustion

Basu, P. (2010). Biomass Gasification and Pyrolysis. Amsterdam: Elsevier.

DeRosa, T. (2015). Renewables vs. Nuclear: Do We Need More Nuclear Power? Retrieved from Renewable Energy Wolrd: https://www.renewableenergyworld.com/ugc/articles/2015/04/renewables-vs-nuclear-do-we-need-more-nuclear-power.html

ecoprog. (2019). Biomass to Power 2018/2019. Retrieved from ecoprog: https://www.ecoprog.com/publications/energy-management/biomass-to-power.htm

European Biomass Industry Association. (2019). Medium to large scale combustors. Retrieved from eubia: http://www.eubia.org/cms/wiki-biomass/combustion/medium-to-large-scale-combusters/?fbclid=IwAR3F3mR_k1UJB1t5XeXIINadEjwygSZHZ02O2dqKvSkx6163zAM5g5w-OiM

Forest Research. (2019). Typical calorific values of fuels. Retrieved from Forest Research: https://www.forestresearch.gov.uk/tools-and-resources/biomass-energy-resources/reference-biomass/facts-figures/typical-calorific-values-of-fuels/

Jiajia Meng, A. M. (2015). Thermal and Storage Stability of Bio-Oil from Pyrolysis of TorrefiedWood. Raleigh, North Carolina: Energy&Fuels.

Kaplan, S. (2008). Power Plants: Characteristics and Costs. Washington: Congerssional Research Service.

Mitsubishi Hitachi Power Systems . (2019). Integrated Coal Gasification Combined Cycle (IGCC) Power Plants. Retrieved from MHPS: https://www.mhps.com/products/igcc/

Morin, O. (2014). Technical and Environmental Comparison of Circulating Fluidized Bed (CFB) and Moving Grate Reactors. Columbia: Columbia University.

Muller-Steinhagen, H. M. (2011, February 7). RANKINE CYCLE. Retrieved from Thermopedia: http://www.thermopedia.com/content/1072/rankinecycle

R K BAGUL, D. S. (2013). Entrainment phenomenon in gas–liquid two-phase flow: A review. Mumbai: Indian Academy of Sciences.

VIASPACE. (2019). Biomass Compared to Fossil Fuels, Solar and Wind. Retrieved from VIASPACE: http://www.viaspace.com/biomass_versus_alternatives.php

Wang, T. (2016). Integrated Gasification Combined Cycle (IGCC) Technologies. Amsterdam: Elsevier.

Waste 2 Energy World. (2019). GASIFICATION. Retrieved from Waste 2 Energy World: http://www.waste2energyworld.com/gasification.htm

Zafar, S. (2018, December 29). Biomass Pyrolysis Process. Retrieved from BioEnergy Consultant : https://www.bioenergyconsult.com/tag/uses-of-bio-oil/

Hassan Ahmed

Hassan graduated with a Master’s degree in Chemical Engineering from the University of Chester (UK). He currently works as a design engineering consultant for one of the largest engineering firms in the world along with being an associate member of the Institute of Chemical Engineers (IChemE).

The post Economic Evaluation of Four Biomass To Electricity Systems | Comparative Technology Pyrolysis, GasEng, Combustion and IGCC Systems appeared first on Engineeringness.

Key Takeaways

1. Constant Air Volume (CAV) systems represent a crucial part of HVAC architecture that provides consistent airflow, contributing to the overall comfort of occupants in various establishments.
2. The CAV system operates on the principle of providing constant volume, which aids in maintaining a steady temperature, regardless of the external conditions.
3. Despite being less energy-efficient than some modern alternatives, CAV systems still offer advantages such as simplicity, reliability, and cost-effectiveness, making them a worthy consideration for specific applications.
4. Advancements in HVAC technology have led to the development of more sophisticated systems that blend the best features of CAV and Variable Air Volume (VAV) systems, ensuring optimal temperature control and energy usage.
5. Understanding the operation, benefits, and limitations of CAV systems can guide businesses and homeowners in making more informed decisions about their climate control options.

A Dive into HVAC’s World: The Role of Constant Air Volume Systems

HVAC, an acronym for Heating, Ventilation, and Air Conditioning, plays a central role in making our built environments habitable. Among the myriad elements of an HVAC system, the Constant Air Volume (CAV) system stands out for its function, design simplicity, and longstanding use.

The CAV system, as the name implies, delivers a constant volume of air at varying temperatures. It’s akin to a trusty workhorse that ensures air circulation remains uninterrupted and steady, crucial in spaces where temperature consistency is required. The principle behind this is fairly simple: by maintaining a constant volume of air supply, the CAV system can regulate temperature by modulating the air’s heating or cooling levels.

This core principle allows CAV systems to be highly reliable and straightforward. It’s a classic example of a system that does one thing and does it well. However, it’s essential to acknowledge the limitations, which include a lack of energy efficiency compared to more modern HVAC technologies and a reduced ability to provide customised temperature control for different areas in a single building.

Pros and Cons of CAV Systems

Advantages

CAV systems bring several advantages to the table, which have ensured their continued relevance in the ever-evolving HVAC industry.

1. Simplicity and Reliability: With their straightforward operation, CAV systems require less maintenance and offer higher reliability compared to more complex systems. They work effectively in environments where a consistent air volume is more critical than individual temperature control.

2. Cost-Effectiveness: CAV systems typically have lower upfront costs, making them an appealing choice for budget-conscious businesses or homeowners. Their simplicity also translates to lower maintenance and repair costs over time.

3. Noise Reduction: CAV systems operate with less noise than other systems due to the steady air flow rate. This feature is particularly advantageous in environments such as offices or libraries, where silence or low noise levels are preferred.

Limitations

Despite their benefits, CAV systems have some limitations that might influence their applicability in specific scenarios.

1. Energy Efficiency: One of the primary criticisms of CAV systems is their lesser energy efficiency compared to other modern systems like VAV. They lack the ability to adjust the volume of airflow based on demand, leading to potential energy wastage.

2. Lack of Individual Control: CAV systems, by design, offer limited zoning capabilities. They are less suitable for environments where individual temperature control for different areas is a requirement.

The Evolution of CAV Systems: A Blend of Old and New

HVAC technologies have made significant strides since the inception of the CAV system. These advancements have seen the advent of Variable Air Volume (VAV) systems, which offer a higher degree of customisability and energy efficiency.

However, this doesn’t spell the end for CAV systems. Hybrid systems, combining features of both CAV and VAV systems, are now seeing increased adoption. These advanced systems offer the consistency of CAV systems with the energy efficiency and customisability of VAV systems, showcasing the best of both worlds.

The Bottom Line

While HVAC technology continues to evolve with a focus on energy efficiency and user comfort, the humble Constant Air Volume system still holds an important position. Whether it’s due to its simplicity, cost-effectiveness, or steadfast reliability, the CAV system has proven its worth in specific applications. As we continue to innovate, we can expect to see the emergence of newer systems that combine the best aspects of the old and the new, all in pursuit of creating optimal and sustainable indoor environments.

Whether you are a homeowner, a business owner, or a developer, understanding the workings, advantages, and limitations of CAV systems can aid in making an informed decision about the most suitable climate control option. The key is to evaluate the specific needs of your space, consider the energy implications, and choose a system that will provide the most comfortable, efficient, and cost-effective solution.

For many, the future of HVAC might look incredibly high-tech, and indeed, this trajectory is exciting. However, there’s something to be said about the simplicity and reliability of the traditional systems. Constant Air Volume systems are, in many ways, a testament to the enduring effectiveness of good, straightforward design. The beat goes on in the HVAC world, and the pulse of that beat remains steady, thanks to the Constant Air Volume system.

Hassan Ahmed

Hassan graduated with a Master’s degree in Chemical Engineering from the University of Chester (UK). He currently works as a design engineering consultant for one of the largest engineering firms in the world along with being an associate member of the Institute of Chemical Engineers (IChemE).

The post The Intricacies of Constant Air Volume: HVAC’s Unsung Hero appeared first on Engineeringness.

Nano-filtration is a modern membrane filtration technique primarily applied to water with low total dissolved solids, like surface and fresh groundwater, aiming to soften it by removing multivalent ions and to eliminate by-products such as natural and synthetic organic materials.

Applications Of Nano-Filtration In Industry

Increasingly, nano-filtration finds its use in the food industry, for the dual purposes of concentration and selective demineralisation of monovalent ions. This process utilises membranes with nanoscale pores, typically ranging from 1 to 10 nanometers, falling between micro-filtration and ultrafiltration in terms of pore size, and slightly larger than reverse osmosis pores. These membranes are usually crafted from polymer thin films, with common materials including polyethylene terephthalate and various metals. The precise control of pore size is achieved by manipulating the pH, temperature, and development time, allowing for pore densities between 1 and 1 million pores per square centimetre.

Traditionally, the primary application of nanofiltration in water treatment has been for softening purposes. This is achieved by its ability to selectively filter out divalent ions, while permitting smaller monovalent ions to pass. This contrasts with ion exchange processes, which typically add sodium ions to the water. Nanofiltration, therefore, offers the advantage of softening water without the introduction of additional elements.

Nano-Filtration Advantages

Nanofiltration’s advantages over centrifugation include its higher precision in filtration, particularly in selective removal of solutes. This makes it suitable for applications requiring detailed separation at the molecular level. Nanofiltration’s membrane-based process allows it to treat a wider range of substances compared to centrifugation, which is limited to separation based on density and size. In agro-industrial applications, nanofiltration efficiently handles waste streams, a task where centrifugation might not be as effective. Moreover, nano-filtration systems can be optimised for energy efficiency and tailored to specific industry requirements, offering operational flexibility.

Reverse osmosis, known for its finer filtration capabilities, can remove almost all particles and contaminants, resulting in nearly pure water. However, it also strips out essential minerals like calcium, magnesium, and potassium, which have known health benefits. Some reverse osmosis systems address this by incorporating a remineralization step.

While reverse osmosis offers a higher level of purification, nano-filtration operates at slightly lower pressures, leading to potential energy savings. Nano-filtration is particularly effective at removing harmful organic substances, including pesticides, without completely stripping the water of beneficial minerals. This selective filtration is advantageous for maintaining the taste and nutritional value of drinking water.

Despite its benefits, nanofiltration is not as commonly employed in industrial membrane filtration, reserved for specific scenarios where pore size specifications fall into its narrow operational range.

Adrian Michaels

Adrian graduated with a Masters Degree (1st Class Honours) in Chemical Engineering from Chester University along with Harris. His master’s research aimed to develop a standardadised clean water oxygenation transfer procedure to test bubble diffusers that are currently used in the wastewater industry commercial market. He has also undergone placments in both US and China primarely focused within the R&D department and is an associate member of the Institute of Chemical Engineers (IChemE).

The post Revolutionising Filtration | Nano-filtration’s Emergence as a Key Technology in Water Treatment appeared first on Engineeringness.

• An industrial material grinder is a powerful machine used to break down and grind various materials.
• Industrial material grinders are commonly used in manufacturing, construction, and recycling industries.
• These grinders can handle a wide range of materials, including wood, metal, plastic, and more.
• Industrial material grinders offer numerous benefits, such as increased efficiency, reduced waste, and cost savings.
• Regular maintenance and proper safety precautions are essential when using an industrial material grinder.

Introduction

In the world of manufacturing, construction, and recycling, the need for efficient and effective material processing is paramount. One machine that plays a crucial role in these industries is the industrial material grinder. This powerful tool is designed to break down and grind various materials, making them easier to handle and process. In this article, we will explore the world of industrial material grinders, their applications, benefits, and safety considerations.

The Versatility of Industrial Material Grinders

Industrial material grinders are incredibly versatile machines that can handle a wide range of materials. Whether it’s wood, metal, plastic, or even concrete, these grinders have the power and capability to break down and grind these materials into smaller, more manageable pieces. This versatility makes them indispensable in industries such as manufacturing, construction, and recycling.

Applications in Manufacturing

In the manufacturing industry, industrial material grinders are used to process raw materials and waste products. They can grind down scrap materials, such as metal or plastic, into reusable forms that can be incorporated back into the manufacturing process. This not only reduces waste but also saves costs by eliminating the need for new raw materials.

Applications in Construction

In the construction industry, industrial material grinders are used for various purposes. They can be used to grind down concrete and asphalt, making it easier to remove and recycle these materials. Additionally, grinders can be used to prepare surfaces for new construction by removing old coatings or smoothing rough surfaces. This versatility makes them essential tools on construction sites.

The Benefits of Industrial Material Grinders

Industrial material grinders offer numerous benefits to industries that rely on efficient material processing. Here are some key advantages of using these machines:

Increased Efficiency

By breaking down materials into smaller, more manageable pieces, industrial material grinders significantly increase efficiency in various industries. Whether it’s reducing the size of raw materials or preparing surfaces for construction, these machines streamline processes and save valuable time and resources.

Reduced Waste

One of the biggest advantages of industrial material grinders is their ability to reduce waste. By grinding down scrap materials, these machines allow for the reuse and recycling of materials that would otherwise end up in landfills. This not only benefits the environment but also helps companies save on disposal costs.

Cost Savings

Industrial material grinders can lead to significant cost savings for businesses. By reusing materials and reducing waste, companies can cut down on the need for new raw materials, ultimately reducing expenses. Additionally, these machines improve efficiency, which can result in higher productivity and profitability.

Safety Considerations

While industrial material grinders offer numerous benefits, it’s essential to prioritize safety when using these powerful machines. Here are some key safety considerations to keep in mind:

Proper Training

Before operating an industrial material grinder, it’s crucial to receive proper training. Understanding how to use the machine safely, including the correct handling of materials and the use of safety features, is essential to prevent accidents and injuries.

Regular Maintenance

Regular maintenance is vital to ensure the safe and efficient operation of an industrial material grinder. This includes routine inspections, lubrication, and replacement of worn parts. Following the manufacturer’s guidelines for maintenance will help prevent breakdowns and ensure the longevity of the machine.

Conclusion

Industrial material grinders are powerful machines that play a crucial role in various industries. Their ability to break down and grind materials offers increased efficiency, reduced waste, and cost savings. However, it’s important to prioritize safety and proper maintenance when using these machines. By understanding their applications, benefits, and safety considerations, industries can harness the full potential of industrial material grinders and optimize their material processing operations.

Adrian Michaels

Adrian graduated with a Masters Degree (1st Class Honours) in Chemical Engineering from Chester University along with Harris. His master’s research aimed to develop a standardadised clean water oxygenation transfer procedure to test bubble diffusers that are currently used in the wastewater industry commercial market. He has also undergone placments in both US and China primarely focused within the R&D department and is an associate member of the Institute of Chemical Engineers (IChemE).

The post The Power and Versatility of Industrial Material Grinders appeared first on Engineeringness.

• Crushed recycled asphalt is a sustainable and cost-effective alternative to traditional asphalt.
• It is made by crushing and recycling old asphalt pavement, reducing the need for new materials.
• Crushed recycled asphalt can be used for various applications, including road construction, driveways, and parking lots.
• It offers excellent durability and weather resistance, making it a long-lasting solution.
• Proper installation and maintenance are crucial for maximizing the benefits of crushed recycled asphalt.

Introduction

When it comes to paving roads, driveways, and parking lots, asphalt is a popular choice due to its durability and cost-effectiveness. However, the production of new asphalt requires significant amounts of natural resources and energy. This is where crushed recycled asphalt comes into play. By recycling old asphalt pavement, we can reduce the need for new materials and contribute to a more sustainable future. In this article, we will explore the benefits and applications of crushed recycled asphalt, as well as provide essential tips for its installation and maintenance.

The Process of Recycling Asphalt

Before we delve into the advantages of crushed recycled asphalt, it’s important to understand how it is produced. The process begins with the collection of old asphalt pavement, which is typically obtained from road resurfacing projects or demolished asphalt structures. The collected asphalt is then crushed using specialized machinery, such as crushers and screeners, to create small particles of various sizes. These particles are then sorted and processed to remove any contaminants, such as rocks or debris. The resulting crushed recycled asphalt can be used as a sustainable alternative to traditional asphalt in various construction projects.

Benefits of Crushed Recycled Asphalt

1. Sustainability: One of the primary benefits of crushed recycled asphalt is its positive impact on the environment. By reusing old asphalt pavement, we can significantly reduce the demand for new materials, thereby conserving natural resources and reducing carbon emissions associated with asphalt production.

2. Cost-effectiveness: Using crushed recycled asphalt can be a cost-effective solution for construction projects. Since it eliminates the need for new materials, it can help reduce overall project costs. Additionally, the availability of recycled asphalt can help stabilize asphalt prices, making it a more affordable option for both contractors and consumers.

3. Durability: Crushed recycled asphalt offers excellent durability and weather resistance. It can withstand heavy traffic loads and extreme weather conditions, making it suitable for high-traffic areas such as roads and parking lots. Its durability also translates to long-term cost savings, as it requires less frequent repairs and maintenance compared to traditional asphalt.

4. Versatility: Crushed recycled asphalt can be used for various applications. It can be used as a base material for road construction, providing a stable foundation for the asphalt surface. It is also commonly used for driveways and parking lots, offering a smooth and durable surface for vehicles. Additionally, it can be used for pathways, bike lanes, and recreational areas.

5. Aesthetics: In addition to its functional benefits, crushed recycled asphalt can also enhance the aesthetics of a project. It has a unique, rustic appearance that adds character and charm to any paved surface. Its dark color also helps to absorb heat, making it ideal for areas with colder climates.

Installation and Maintenance

Proper installation and maintenance are crucial for maximizing the benefits of crushed recycled asphalt. Here are some essential tips:

1. Preparation: Before laying crushed recycled asphalt, the surface should be properly prepared. This includes removing any existing vegetation, debris, or loose materials. The surface should be graded and compacted to ensure a stable base.

2. Thickness: The thickness of the crushed recycled asphalt layer will depend on the intended use and the expected traffic load. It is important to consult with a professional to determine the appropriate thickness for your specific project.

3. Compaction: Proper compaction is essential for achieving a durable and long-lasting surface. A vibratory roller or plate compactor should be used to compact the crushed recycled asphalt, ensuring that it is tightly packed and free of voids.

4. Maintenance: Regular maintenance is key to preserving the integrity of the crushed recycled asphalt surface. This includes regular sweeping to remove debris and periodic resealing to protect against moisture and UV damage. Additionally, any cracks or potholes should be promptly repaired to prevent further deterioration.

Conclusion

Crushed recycled asphalt offers a sustainable and cost-effective alternative to traditional asphalt. By recycling old asphalt pavement, we can reduce the demand for new materials and contribute to a more environmentally friendly construction industry. Its durability, versatility, and aesthetic appeal make it a popular choice for various applications, including road construction, driveways, and parking lots. However, proper installation and maintenance are crucial for maximizing its benefits. By following the recommended guidelines, we can ensure that crushed recycled asphalt continues to be a viable and sustainable solution for our paving needs.

Adrian Michaels

Adrian graduated with a Masters Degree (1st Class Honours) in Chemical Engineering from Chester University along with Harris. His master’s research aimed to develop a standardadised clean water oxygenation transfer procedure to test bubble diffusers that are currently used in the wastewater industry commercial market. He has also undergone placments in both US and China primarely focused within the R&D department and is an associate member of the Institute of Chemical Engineers (IChemE).

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