Difference between Reciprocating Compressor and Rotary Compressor

reciprocating vs rotary compressor

🔗Reciprocating compressors working, applications, advantages and disadvantages
🔗Rotary compressor working, applications, advantages and disadvantages

Reciprocating compressor
Rotary compressor
Fluid compressed by reciprocating motion of piston.

Fluid compressed by rotary motion of blades.
Prime mover (motor or engine) and compressor is separated, so they are heavy and bulky for a given discharge volume.
Prime mover and compressor and compressor are pressed in to a cylinder, so they are small and light.

High clearance volume.
Negligible clearance volume

Low volumetric efficiency when compared to rotary compressor
High volumetric efficiency compared to reciprocating compressor.

Low speed compressor.
High speed compressor.

High pressure ratio per stage is achieved.
Discharge pressure per stage is low when compared to reciprocating compressor.

The quantity of fluid it can handle is very low
 Since it operates at high speed it can handle high volume fluid.

Used for high and medium pressure ratio and for low and medium volume.
Used for high and medium pressure ratio and large volume.

Greater vibration and shaking due to reciprocating action. The machine parts are poorly balanced.

The machine parts are fairly balanced, it has very less vibration.
Since heavy vibration and shaking it require rigorous foundation.
Since less vibrational problem it do not require rigorous foundation.

High maintenance required
Well balanced machine so it require less maintenance.

The supply of compressed fluid is intermittent.
Supply of compressed fluid is continuous.

Complicated lubrication is required
Simple lubrication.

The fluid (air) is directly comes in contact with lubricating oil, so the discharge is often dirty.

The discharged fluid is clean and free form dirt.
It has greater flexibility in capacity and pressure range.

No flexibility in capacity and pressure range.



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