A typical power plant uses some fuel as the source of heat (QH) to drive a heat

Question

A typical power plant uses some fuel as the source of heat (QH) to drive a heat engine that does work (W) to drive a generator that is connected to the electrical grid. Inevitably, waste heat (QC) is dumped into a river or lake. Analysis of the plant is usually done in terms of power rather than energy. To analyze the cooling system rate of flow is used. what is the efficiency? I know there is no numbers, just a general explanation of the situation or how to approach this would be greatly appreciated

Explanation / Answer

efficiency = energy output / energy input = (W)/(Qh - Qc)

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