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← ScienceWhich consequence reduces the efficiency after short-cycling a Stirling engine approaching ideal Carnot efficiency?
A)Increased isothermal compression time ratio
B)Decreased regenerator matrix temperature gradient✓
C)Elevated adiabatic expansion cooling delta
D)Reduced isochoric heating temperature uniformity
💡 Explanation
A reduced regenerator matrix temperature gradient limits heat recapture; short cycling disrupts the ideal temperature profile. Therefore efficiency drops, because the regenerator's effectiveness is diminished, rather than issues related to compression or expansion.
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