Reciprocating compressor vs. centrifugal compressor? Which one has better performance?

Let’s see how to make the comparison: In terms of efficiency, piston-type systems generally have higher efficiency than centrifugal types. In terms of operational stability: centrifugal types are better than piston types. In terms of failure rate: piston-type is higher than centrifugal-type. In terms of equipment investment: centrifugal types are much higher than piston types. In terms of operation and maintenance requirements: centrifugal types have much higher requirements than piston types. In terms of equipment noise: piston-type ones are generally louder than centrifugal types.

Agree with the opinion above. Personally, I lean towards reciprocating compressors, as efficiency and energy savings are of utmost concern to modern businesses.

Under working conditions with low compression and high flow rates, centrifugal compressors are suitable for use； Under operating conditions of high compression ratio and low flow rate, a reciprocating compressor is preferable.

Only piston compressors can handle conditions with very high pressure, while centrifugal compressors have a large flow rate and low pressure fluctuations.

Centrifugal compressors are suitable for high flow rates at relatively low pressures (around 0.8 MPa). Piston compressors are suitable for applications with relatively low flow rates but high pressures (0~100 MPa or even higher).

Each has its own advantages; the pressure increases in a back-and-forth manner, while the pressure in centrifugal systems remains relatively stable

The specific selection of compressors depends on the process; different process requirements call for different types of compressors. Generally speaking, within the scope of the process, centrifugal compressors should be preferred as much as possible; although the initial investment is high, they require less maintenance and operate stably.

Piston machines are rarely used these days, but they remain useful in situations involving special gases or high pressures, such as with liquefied gas. Centrifuges are generally used for high flow rates, such as in the air compressors of utility systems. Centrifuges require a higher level of technical expertise, mainly in terms of flow regulation; their efficiency is relatively low due to significant gas leakage. Piston machines, on the other hand, offer better stability, but they experience more wear and tear. There are no reliable large-scale centrifuges available in the country yet.

Alas, there are many large centrifugal compressors in the domestic market; SHENGU is a strong competitor to foreign companies

In terms of efficiency: the efficiency of piston types is generally higher than that of centrifugal types. In terms of operational stability: centrifugal types are better than piston types. In terms of failure rate: piston-type is higher than centrifugal-type. In terms of equipment investment: centrifugal types are much higher than piston types. In terms of operation and maintenance requirements: centrifugal types have much higher requirements than piston types. In terms of equipment noise: piston-type ones are generally louder than centrifugal types. Centrifugal compressors are suitable for high flow rates at relatively low pressures (around 0.8 MPa). Piston compressors are suitable for applications with relatively low flow rates but high pressures (0~100 MPa or even higher). Under working conditions with low compression and high flow rates, centrifugal compressors are suitable for use ； Under operating conditions of high compression ratio and low flow rate, a reciprocating compressor is preferable.

Piston types generally have lower initial investment costs compared to centrifugal types. Centrifugal types have lower operating and maintenance costs than piston types, but their operating expenses are much higher than those of piston types

For high flow rates, centrifugal pumps are more energy-efficient; for low flow rates, piston pumps should be preferred!

In production, reciprocating types are still preferable; multiple reciprocating units can be used with one as a backup, so that if one of the units fails, normal production is not affected.

Piston machines require a standby unit and a buffer tank, while centrifugal ones do not.

Each has its own strengths; in philosophical terms, existence is reasonable.

Piston compressors are suitable for lower flow rates, with a wide pressure range； Centrifugal compressors are suitable for high flow rates, but their cost is much higher than that of piston compressors. If high production standards are required, I recommend using piston compressors; it’s advisable to have a backup unit to avoid production disruptions in case of machine failure

The key is what are your needs? Everyone has their own strengths. As for the advantages and disadvantages, the principles of chemical engineering explain them clearly.

In terms of efficiency: the efficiency of piston types is generally higher than that of centrifugal types. In terms of operational stability: centrifugal types are better than piston types. In terms of failure rate: piston-type is higher than centrifugal-type. In terms of equipment investment: centrifugal types are much higher than piston types. In terms of operation and maintenance requirements: centrifugal types have much higher requirements than piston types. In terms of equipment noise: piston-type ones are generally louder than centrifugal types.

For important applications, centrifugal compressors are generally the preferred choice. If a single compression stage is not sufficient, multi-stage compression can be employed; such compressors have a low failure rate, high flow rates, and stable pressure. Examples include catalyst-rich gas compressors and ethylene cracking gas compressors – stopping these units for maintenance results in excessive losses that outweigh any benefits； For secondary equipment, a piston compressor can be used; after all, it is inexpensive, has fewer auxiliary components, and can achieve a higher compression ratio. However, its failure rate is high, so usually one unit is in operation while another serves as a backup.

Each has its advantages. Piston technology is highly mature.