Compressors, Gas Turbines and Jet Engines
The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)

p₂ = p₁ × p₃
p₂ = p₁ × p₂
p₂ = p₃/p₁
p₂ = p₁/p₃

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

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

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