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← ScienceWhich outcome occurs when the working fluid reaches supercritical phase in a Rankine cycle?
A)Isentropic turbine efficiency decreases sharply✓
B)Condenser heat transfer rate is minimized
C)Pump work requirement reduces significantly
D)Reheat cycle efficiency is substantially unaffected
💡 Explanation
If a fluids is above its critical point the properties are harder to optimise, and it won't undergo phase change, making steam's latent heating capability impossible. Therefore, the isentropic turbine efficiency sharply decreases for the system, because effective expansion relies upon condensation rather than property change alone.
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