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At a coal-burning power plant a steam turbine is operated

Chapter 18, Problem 49P

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QUESTION:

Problem 49P

At a coal-burning power plant a steam turbine is operated with a power output of 548 MW. The thermal efficiency of the power plant is 32.0%. (a) At what rate is heat discarded to the environment by this power plant? (b) At what rate must heat be supplied to the power plant by burning coal?

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QUESTION:

Problem 49P

At a coal-burning power plant a steam turbine is operated with a power output of 548 MW. The thermal efficiency of the power plant is 32.0%. (a) At what rate is heat discarded to the environment by this power plant? (b) At what rate must heat be supplied to the power plant by burning coal?

ANSWER:

Step 1 of 3

Here, we have to calculate the heat dissipated at the cold reservoir and the amount of heat withdrawn from the hot reservoir.

The equation for the efficiency of the heat engine,

 -------------- (1)

Where,  - Work done by the system

              - Heat withdrawn from the hot reservoir

The work done by the heat engine,

Where,  - Heat dissipated at the cold reservoir

a)

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