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← ScienceWhich outcome occurs when a Stirling engine operates with high internal dead volume?
A)Reduced thermal efficiency overall✓
B)Increased engine power output
C)Improved low-temperature operation
D)Decreased internal pressure fluctuations
💡 Explanation
The Stirling engine's efficiency decreases because the dead volume reduces the pressure ratio achieved during the cycle, diminishing the effectiveness of the heat exchangers and working fluid displacement; therefore, thermal efficiency is lowered, rather than higher output without complete compression.
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