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← ScienceWhich mechanism causes decreased heat transfer efficiency during steam turbine operation?
A)Surface condensation forms an insulating layer✓
B)Increased steam venturi turbulent flow
C)Superheated steam accelerates blade fatigue
D)Steam autoignition generates excess enthalpy
💡 Explanation
Surface condensation causes a loss of heat transfer because filmwise condensation forms an insulating layer on turbine blades; therefore, heat transfer decreases because of thermal resistance, rather than improved convective heat transfer.
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