Compressors, Gas Turbines and Jet Engines
Rotary compressors are suitable for

Low discharge at high pressure
Low discharge at low pressure
Large discharge at high pressure
Large discharge at low pressure

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

Isentropic power to the power required to drive the compressor
Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio
Volume of free air delivery per stroke to the swept volume of the piston

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