Solved: A typical coal-fired power plant burns 300 metric
Chapter 21, Problem 21.80(choose chapter or problem)
A typical coal-fired power plant burns 300 metric tons of coal every hour to generate 750 MW of electricity. 1 metric ton = 1000 kg. The density of coal is 1500 kg/m3 and its heat of combustion is 28 MJ/kg. Assume that all heat is transferred from the fuel to the boiler and that all the work done in spinning the turbine is transformed into electric energy. a. Suppose the coal is piled up in a 10 m * 10 m room. How tall must the pile be to operate the plant for one day? b. What is the power plants thermal efficiency?
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