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What is the efficiency of an engine operating at a high temperature of 500 K and...

What is the efficiency of an engine operating at a high temperature of 500 K and a low temperature of 300 K. What would the low temperature have to be to produce an efficiency of 40 %?

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Answer #1

effeciency = 1- TL/TH
                        = 1- (300/500)
                        = 1- 0.6
                        = 0.4
Answer: 0.4 or 40 %

Low temperature of 300 K produces 30% effeciency as seen above

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