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← ScienceWhich outcome occurs when isentropic efficiency decreases in a gas turbine?
A)Increased fuel consumption efficiency
B)Decreased turbine output temperature
C)Increased heat rejection to cooling✓
D)Decreased compressor pressure ratio
💡 Explanation
Increased heat rejection to cooling water occurs, because lower isentropic efficiency means more irreversible processes within the turbine. This increases the exhaust enthalpy; therefore, more heat is rejected to the cooling system, rather than converted to effective work.
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