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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.

Difficulty: Easy

Correct Answer: Equal to Carnot cycle

Explanation:

Concept
A 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.


Conclusion
Thus, the efficiency of an ideal Stirling cycle equals the Carnot efficiency for the same temperature limits.


Final Answer
Equal to Carnot cycle

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