Shandong Zollant machinery manufacturing Co., Ltd is an integrated industry and trade company. The company covers an area of more than ten thousand square meters. With an annual output value of 10 million yuan and fixed assets more than 50 million yuan. We provide customization service of all our Air Compressors.
Zollant Air Compressor Co., Ltd is ruling Towable Air Compressors market over two decades. We always strive to serve in best possible way. Fulfilling our commitment is our motive.
We provide customers with high-end turbomachinery products, such as centrifugal compressors, centrifugal fans, centrifugal vacuum pumps, ORC turbine expanders, steam turbines, etc. The products of Shanghai Sollant are designed and manufactured in strict accordance with ISO 9001 and ISO 14001 to ensure their high reliability and efficient operation.
Turbo blower by the air bearings, engine base, permanent magnet synchronous motor, frequency conversion controller, self-cooling system composition, and is equipped with air filtration equipment and vent valve silencer. Due to the air suspension bearing technology, blower bearing friction, vibration, heat-dissipating capacity is small, below 80-decibel noise, therefore, no lubricating oil system.
Zollant has customized a matching air compressor for the cutting industry, which can meet the demanding requirements of various laser cutting equipment for water, oil, and particles in compressed air. The product adopts five-stage filtration and non-heat regeneration adsorption dryer. Pressure dew points up to -20 ° C ~ 70 ° C.
To explore in the cutting machine industry, the cost of liquid oxygen per barrel is generally about 70-90$. If your machine work 8 hours a day, you can consume this barrel of oxygen in about 4 days. The average cost of oxygen reduction is 19$ per day. If you are interested in reducing the cost of using the air compressor for laser cutting industry, feel free for contacting Zollant.
Centrifugal air compressors have a wide range of applications in almost every industry. They are commonly used in power plants, processing facilities, and large-scale refrigeration because they are capable of offering a high-pressure ratio and a large operating range with high efficiency.
These compressors are mainly used due to their ability to handle small volume flows. However, they have other advantages that make them suitable for use in many industries. For instance, centrifugal air compressors have a shorter length than axial flow compressors. They are also less susceptible to performance loss due to the accumulation of deposits on the blade surfaces. Additionally, centrifugal compressors are more suitable for operations that require a constant and wide range of mass flow. This article will focus more on the efficiency of a centrifugal air compressor, which is one area that makes or breaks any compressor type.
Centrifugal air compressors are primarily efficient tools used to offer a constant supply of compressed air in many industrial and domestic applications. However, internal and external compressor factors may affect efficiency in many ways. For instance, the inlet temperature and weather conditions are two aspects that have a massive influence on centrifugal air compressor efficiency.
Basically, centrifugal air compressors have lower efficiency compared to axial flow compressors. With that said, efficiency remains one of the most crucial performance aspects of any compressor. Therefore, it is essential to understand how to increase the efficiency of any compressor unit.
Centrifugal air compressors are one of the most energy-efficient machines. However, this efficiency can be improved in many ways. For instance, here are some of the methods centrifugal air compressor manufacturers use to make their units more energy-saving:
There are many other ways to increase the efficiency of a centrifugal air compressor. For instance, centrifugal air compressor manufacturers make necessary upgrades on the impeller flow passage for the same. However, these upgrades can be relatively expensive and may not achieve any significant change in performance or efficiency.
The methods used to increase the efficiency of a centrifugal air compressor are discussed below in detail.
Initially, centrifugal air compressor operators did not realize the need to change centrifugal air compressor rotors or any other centrifugal air compressor component. However, it was later realized that the labyrinth seals rubbed against the rotor when the horizontal split casing was tightened. This situation led to the coating eating up the clearance, leading to compressor rotor jamming.
Compressor fouling may reduce, but the foulant continues to flow. However, when a coating is added to the stationary parts, the performance is enhanced.
Operational costs for a seal oil system can be higher or lower depending on the size of the prime mover for the seal oil system. Accordingly, there is always a loss in wet contact seals than dry gas seals. However insignificant, the accumulated loss can be higher.
To reduce this loss, manufacturers often replace wet seals with dry seals. Nonetheless, this is not always a reliable solution since the dry gas seal panel is complex than the seal oil system. Additionally, it requires training.
Operating a fouled centrifugal air compressor results in higher specific power usage. The best remedy for this problem is to run an online wash. Naphtha or water can be used to enhance efficiency by washing the compressor. However, the effectiveness of this technique depends on the nozzle location with respect to the fouling.
Washing often comes with two risks. First, the compressor unit may end up achieving higher vibration if the fouling distribution and the effectiveness of the cleaning vary with the rotor location. Secondly, there is the risk of contamination reaching the dry gas seals, resulting in failures.
Due to the two problems, most centrifugal air compressor manufacturers recommend this technique on gas turbines, air blowers, and some wet gas compressors.
A centrifugal air compressor can have a maximum efficiency of between 70% and 85%. However, this may vary depending on mechanical losses and gas friction. Additionally, these two factors vary from one compressor to another.
The isothermal efficiency of an air compressor is the measure of the unit’s performance in a centrifugal air compressor. This variable can be expressed as a ratio of the isothermal work input to the actual work input. A centrifugal air compressor is required to achieve pressure rise with the minimum possible work input. This situation occurs with isothermal air compression.
Isothermal air compression is the ideal case because work input is not absorbed to achieve the temperature rise of the compressed air.
The overall isothermal efficiency of an air compressor is the ratio of the isothermal power to the shaft power or the motor’s B.P. required to drive the air compressor.
Here is an expression that can help you calculate the efficiency of a centrifugal air compressor:
The CFM of compressed air needed to raise known system pressure to the required system pressure is;
C1= C2 [ (P1+14.7)/(P2+14.7)]
Accordingly, the simple energy formula to motor efficiency is;
Cost per KW X .746 (Power Factor) X Hours of operation X Brake horsepower
You should understand that no electric motor can be 100% efficient. Additionally, for every 1 PSIG pressure drop, BHP goes down 0.5 %.
As suggested early, no machine can be 100% efficient. This means that some units may require performance enhancement to achieve the highest possible performance efficiency. In the case of a centrifugal air compressor, the four methods named earlier can be helpful. These are:
Centrifugal air compressors are some of the most reliable and efficient compressor units in the market. However, they are not as efficient as axial flow compressors. Since they are used in many industrial applications, they often require tuning to increase efficiency. This article has explained some methods used to increase the efficiency of a centrifugal air compressor. If you want to buy a centrifugal air compressor, ensure you deal with the best manufacturers in the market. These centrifugal air compressor companies guarantee highly efficient compressors.
Centrifugal air compressor applications range from chemical plants to oil and gas refineries and various on-shore and off-shore gas injection applications.
The application of a centrifugal air compressor leads to a pressure rise by incorporating velocity into a fluid flow. This velocity is then transformed into an increase in static pressure. The device achieves this by interfering with the flow and reducing it down with the help of a diffuser.
The diffuser of the centrifugal air compressor converts the maximum portion of the flowing air velocity into static pressure.
Centrifugal Air Compressor VS Rotary Screw
Before you purchase an air compressor for your needs, make sure you go through enough resources highlighting centrifugal vs screw air compressors, as it will help you have a better idea of how these tools work.
Rotary screw air compressors, as their name suggests, work with rotation. The rotary screw is responsible for air compression. Notably, rotary screw air compressors are less complex than reciprocating compressors. You can get a better idea of this when you compare rotary screw diagrams with centrifugal compressor diagrams.
While centrifugal air compressors work differently than rotary compressors, they more or less offer similar results. What makes centrifugal air compressors a good choice is they are more efficient and it is also easier to customize them.
How do Centrifugal Air Compressors work?
Centrifugal air compressor working revolves around converting the energy utilizing multiple steps of compressing and cooling the air. In a centrifugal air compressor, the pressure developed depends on the continuous conversion of angular momentum.
The application of centrifugal air compressor leads to large volumes of refrigerant and that too on low pressure. In a centrifugal air compressor, the pressure ratio is increased by the tip speed of the blade.
Centrifugal Air Compressor Efficiency
Air compressor efficiency depends on many factors, including the size and type of air compressors. As a general rule, centrifugal air compressor efficiency hovers between 0.70-0.85, while it lies anywhere between 0.65-0.75 for rotary air compressors.
Types of Centrifugal Compressor
Different types of centrifugal compressors are available in the market, including single-stage compressors, multistage centrifugal compressors, small centrifugal air compressors, etc. We’re going to discuss a few of them down below.
Single Stage Centrifugal Compressor
Single-stage compressors are among the most popular centrifugal-type air compressors that come with a single impeller. The purpose of the impeller is to direct the flow of air. This type of centrifugal air compressor also includes a diffuser and guide vanes.
Prominent single-stage centrifugal air compressor examples include over-hung compressors, integrally geared compressors, and more.
Multi-Stage Centrifugal Compressor
Multi-stage centrifugal compressors are designed to pass the air through multiple stages. These compressors are used in a wide range of applications.
Multi-stage centrifugal compressors are ideal for situations when single-stage compressors are not able to fulfill the desired pressure requirements. Examples include split-casing multi-stage centrifugal compressors, bell casing compressors, and pipeline compressors.
Uses of Centrifugal Air Compressors
Centrifugal air compressors can be selected for plant air compression and various other air separation applications. They’re also used for transmission and storage of natural gas as well as different gas injection applications.
Centrifugal Air Compressor Advantages and Disadvantages
In this section, we’re going to highlight centrifugal air compressor advantages and disadvantages.
Pros
Cons
Centrifugal Air Compressors Parts
A basic centrifugal air compressor comes with 4 centrifugal compressor parts – inlet, impeller, diffuser, and collector.
Inlet is a simple pipe that is responsible for controlling the flow of air.
The impeller is the centrifugal compressor component consisting of multiple blades that increases the energy of the gas.
Diffuser converts the kinetic energy of the gas into pressure by lowering the gas velocity.
As its name suggests, the collector collects the flow and transmits it to a downstream pipe.
Centrifugal Air Compressor Manufacturers
There are many centrifugal air compressor manufacturers in the market that are known for high-accuracy products. We’re going to highlight a few of them in the following section.
Atlas Copco Centrifugal Air Compressor
Atlas Copco is a renowned centrifugal compressor manufacturer which was established back in 1873. The company is currently working in 180+ countries. Their product range includes air compressors, mining and construction tools, etc.
Ingersoll Rand Centrifugal Air Compressor
Ingersoll Rand is another famous centrifugal compressor manufacturer that also boasts a diversified portfolio of selling rotary screw, lubricated, and oil-free compressors. Apart from that, they manufacture HVAC systems, refrigeration solutions, and other commercial and industrial systems.
Samsung Centrifugal Air Compressor
Samsung also produces a wide range of oil-free centrifugal compressors. Their SM/SM100/SME series has specifically gained popularity among industrialists around the globe.
Sulzer
Sulzer is a popular engineering and manufacturing brand that is presently operating in 150+ countries. The brand offers a wide range of high-power compressors, including XTA & XTAK aerators and HSR and HST turbocompressors.
Doosan
Doosan has managed to earn and manage its reputation as an industry leader since 1896. Today, the compressors produced by Doosan are widely used in numerous industrial and commercial factories in more than 38 countries.
Things to Consider Before Buying a Centrifugal Air Compressor
Buying a centrifugal air compressor is a long-term business decision. Since compressors are pricey, you must do your research first before investing in any product available in the market.
The web is crowded with centrifugal air compressor pdf guidelines that also include centrifugal air compressor diagrams and details about centrifugal air compressor calculations to help you evaluate the centrifugal air compressor efficiency.
It is also critical to compare the prices of different products and see which specific model and brand offers the best value for your money.
Last but not least, always purchase your compressor from the best centrifugal air compressor manufacturers – preferably those who hold quality assurance certifications.
