Carnot efficiency and COP calculator
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Result
Carnot efficiency55.71 %
Maximum COP, refrigerator0.7951
Maximum COP, heat pump1.795
Step-by-step solution
Absolute temperatures
TH = 673.1 K, TL = 298.1 K
Second-law limits
η = 1 − TL/TH = 55.71%
COPR = TL/(TH − TL) = 0.7951
COPHP = TH/(TH − TL) = 1.795
Key formulas
- Efficiency
- η = W/QH = 1 − QC/QH
- Carnot efficiency
- ηC = 1 − TC/TH (kelvin)
- Refrigerator COP
- COPR = QC/W
- Heat pump COP
- COPHP = QH/W = COPR + 1
- Energy balance
- QH = W + QC
Practise Heat engines & refrigerators
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