A certain coal-fired power plant has a rated power capacity of P = 550 MW. The output of this plant is W = 0.27QH, where QH is the energy input as heat from the hot reservoir. show answer No Attempt 14% Part (a) Write an equation for the efficiency of a heat engine in terms of QH and the heat QC exhausted to a low temperature reservoir. η = | – α β θ a b c d e f g h j k m P QC QH S t ( ) 7 8 9 HOME ↑^ ^↓ 4 5 6 ← / * 1 2 3 → + - 0 . END √() BACKSPACE DEL CLEAR Grade Summary Deductions 0% Potential 100% Submissions Attempts remaining: 5 (0% per attempt) detailed view Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. No Attempt No Attempt 14% Part
(b) Which would increase the efficiency more, doubling QH or reducing QC by half? No Attempt No Attempt 14% Part
(c) Calculate the maximum thermal efficiency of the power plant. No Attempt No Attempt 14% Part
(d) Calculate the absolute value of the exhausted heat (QC) each second in MJ for the power plant. No Attempt No Attempt 14% Part
(e) If the power plant operates for a full day at its rated capacity, how much energy QH in MJ is needed? No Attempt No Attempt 14% Part
(f) If, on average, one ton of coal contains Q = 25 GJ of energy, how many tons nH of coal would the plant need to operate for a day at its rated capacity? No Attempt No Attempt 14%
Part (g) How many tons nC of this coal is exhausted as wasted heat to QC in a single day?
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