Compressor Power Calculator — Compression Ratio & BHP | Engineering Calc Pro

💼 Compressor Power Calculator

Power, compression ratio, and discharge temperature

Inlet Flow Rate (ACFM)

Inlet Pressure (psia)

Outlet Pressure (psia)

Inlet Temperature (°F)

Isentropic Efficiency (%)

Gas Ratio of Specific Heats k

Compression Ratio

—

P₂/P₁

Isentropic Power

—

BHP

Brake Power (actual)

—

BHP

Discharge Temp

—

°F

CR = P₂/P₁

W_isen = [k/(k−1)] × P₁Q × (CR^(k−1)/k − 1)

T₂ = T₁ × CR^(k−1)/k

Air compressor: 100 ACFM, 14.7 to 100 psia, 70°F inlet, 75% efficiency, k=1.4.

CR = 100/14.7 = 6.80 | W_isen = 24.7 BHP

Actual = 24.7/0.75 = 32.9 BHP | T₂ = 530 × 6.80^0.286 = 930 R = 470°F

Result: CR = 6.80 | 32.9 BHP | Discharge temp = 470°F