Thermal efficiency comparison: Stirling cycle versus Carnot cycle State how the efficiency of the (reversible, regenerator-based) Stirling cycle compares with a Carnot cycle operating between the same temperature limits. Choose the correct relationship.
Mechanical Engineering
Thermodynamics
Difficulty: Easy
Choose an option
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ALess than Carnot cycle
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BEqual to Carnot cycle
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CGreater than Carnot cycle
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DIndependent of temperature limits
Answer
Correct Answer: Equal to Carnot cycle
Explanation
ConceptA Stirling cycle with perfect regeneration is a reversible cycle. All reversible heat engines operating between the same two thermal reservoirs have the same efficiency—namely that of the Carnot cycle: η = 1 − Tc/Th.
ConclusionThus, the efficiency of an ideal Stirling cycle equals the Carnot efficiency for the same temperature limits.
Final AnswerEqual to Carnot cycle