// multi-utility computation suite · offline · instant · precise
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eng.steam-Rankine-efficiency Calculator
Calculates steam Rankine cycle thermal efficiency, net work output, and heat rejection from steam turbine inlet and condenser conditions. The Rankine cycle efficiency increases with higher turbine inlet temperature and lower condenser pressure — regenerative feedwater heating improves efficiency by 5–10%.
Inputs
T Boiler C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
T Condenser C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Eta Turbine
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Eta Pump
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Results
actual Rankine efficiency η
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
ideal Carnot efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
ideal Rankine efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
Carnot: η = 1 − TL/TH
Sample size or count used in the calculation.
superheat temperature TH (K)
The value at the specified point or condition.
efficiency gap vs Carnot
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.