Centrifugal Compressor Polytropic Head & Power Calculator

Determine polytropic head ($H_p$), polytropic exponent ($n$), discharge temperature ($T_2$), and shaft gas horsepower using the Schultz ASME PTC 10 method.

Suction & Discharge Process Data

Suction Pressure P_1 (bar a):

Discharge Pressure P_2 (bar a):

Suction Temp T_1 (°C):

Gas Molecular Weight MW: Air=28.96, CH4=16.04, CO2=44.01

Isentropic Ratio k (c_p/c_v):

Polytropic Eff η_p: Typical: 0.74 - 0.83

Mass Flow Rate ṁ (kg/s):

Avg Compressibility Z_avg:

Polytropic Compression Results

Polytropic Head (H_p)

Gas Power Required

Pressure Ratio r_p

Discharge T_2

Polytropic n

Compressor Duty Summary

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Centrifugal Compressor Polytropic Head & Power Calculator

Suction & Discharge Process Data

Polytropic Compression Results

Frequently Asked Questions