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eng.compressor-work Calculator
Calculates isentropic compressor work, polytropic work, and outlet temperature from inlet conditions and pressure ratio. Compressor isentropic efficiency is typically 75–85% for centrifugal and 80–90% for axial machines — the difference converts to heat added to the gas.
Inputs
P1
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
P2
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
T1
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Eta S
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
K
Energy to raise 1 kg of material by 1°C (J/kg·K). Water: 4,186 J/kg·K. Metals are typically 100–900 J/kg·K.
Results
pressure ratio
The proportional relationship between two quantities.
isentropic work
Sample size or count used in the calculation.
actual work
Reference formula or conversion factor shown for context.
outlet temp
Reference formula or conversion factor shown for context.