Compression, adiabatic multistage

Pq and Pn are the initial and final pressures. K is the compression factor, typically between 3 to 4 for piston compressors, and 1.1 to 1.5 for turbo-compressors. The cost of the equipment can be estimated based on the power for adiabatic compression. For multistage stage compression with intermediate cooling at the inlet temperature the compression power W is given by the relation ... 

For multistage compressors of N, number of stages with adiabatic compression in each stage, equal division of work between stages, and intercooling to the intake temperature, the following formulas are helpful ... 

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