Compressors, Gas Turbines and Jet Engines
Rotary compressor is best suited for

Large quantity of air at low pressure
Large quantity of air at high pressure
Small quantity of air at high pressure
Small quantity of air at low pressure

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor with clearance volume

In not dependent upon compression ratio
May increase/decrease depending on compressor capacity
Decreases with increase in compression ratio
Increases with increase in compression ratio

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Compressors, Gas Turbines and Jet Engines
The overall isothermal efficiency of compressor is defined as the ratio of

Isothermal h.p. to the BHP of motor
Work to compress air isothermally to work for actual compression
Isothermal h.p. to adiabatic h.p.
Power to drive compressor to isothermal h.p.

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