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Question

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 A 34%
η0=ηb×ηT(R)×ηmech(T)×ηgen×ηAux
=0.92×0.44×0.94×0.96×0.94=0.34
=34%

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