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← ScienceWhich outcome occurs when injecting hot steam into turbine exhaust manifold (Rankine Cycle)?
A)Increased compressor efficiency, lowered outlet enthalpy
B)Decreased isentropic efficiency vapor condenses✓
C)Steam energy converted, elevated liquid temperatures
D)Lower backpressure, reducing exhaust gas temperature
💡 Explanation
Decreased isentropic efficiency results because of intermixing the hot injected steam with working vapor exhaust gas. This causes a non-isentropic process of partial condensation, therefore decreasing expansion efficiency, rather than increasing it without phase and enthalpy adjustments.
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