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The power output of a power plant is 5MW.The power plant rejects heat to a nearby...

The power output of a power plant is 5MW.The power plant rejects heat to a nearby lake at the rate of 6MW. (a) What is the heat input to the power plant? (b) What is the efficiency of the power plant The temperature of the heat source is 600K while the temperature of the ambient is 270C. (c) What is the Carnot efficiency of this power plant? (d) Does the operation of this power plant violate the second law of thermodynamics?

Engineering   Mechanical-Engineering   
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Answer #1

In this problem use definition of work output i.e,

a-  heat input to the power plant = 11MW

b- efficiency of the power plant = 45.45 %

c- Carnot efficiency = 50 %

d- since efficiency of power plant is less than carnot cycle efficiency therefore it does not violate second law of thermodynamics.

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