A steam power plant has the boiler efficiency of 92%, turbine efficienc (mechanical) of 94% generator efficiency of 95 and cycle efficiency of 44%. If 6% of the generated power is used to run the auxiliaries, the overall plant efficiency is
A
34%
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B
39%
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C
45%
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D
30%
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Solution
The correct option is A34% η0=ηb×ηT(R)×ηmech(T)×ηgen×ηAux =0.92×0.44×0.94×0.96×0.94=0.34 =34%