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Question
The enthalpy of steam entering a turbine in a Rankine cycle is 3200 kJ/kg. The enthalpy after isentropic expansion is 2400 kJ/kg and the enthalpy at the end of actual expansion is 2560 kJ/kg. What is the turbine efficiency? 
A.
75%
B.
80%
C.
85%
D.
90%
Answer ( Option B)

80%

Solution

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