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Which outcome occurs when a Stirling engine's regenerator matrix deteriorates in thermal conductivity?

A)Reduced temperature differential across the displacer
B)Increased pressure ratio across the power piston
C)Elevated cyclic heat transfer inefficiency
D)Decreased working fluid mass within the cycle

💡 Explanation

When the regenerator matrix degrades, increased heat leakage occurs because lower conductivity reduces effective heat storage during the cycle, increasing losses and inefficiencies in the engine. Therefore, cyclic heat transfer inefficiency results, rather than altered temperatures, ratios, or mass which depend on mechanical adjustments.

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