652_Physics ProblemsTechnical Physics

652_Physics ProblemsTechnical Physics - 654 P22.58 Heat...

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654 Heat Engines, Entropy, and the Second Law of Thermodynamics P22.58 (a) W t eng electrical W 150 10 8 . af , Qm L t W t == L N M M O Q P P eng 0150 . , and L × 33 0 33 0 10 6 .. kJ g J kg m Wt t L m = L N M O Q P = × × = eng W s d a y Jkg kgme t r ic ton metric tons day 86400 0150 330 10 10 2620 8 63 . . ej bg e j (b) Cost = $8.00 2 618 365 metric ton metric tons day days yr b g b g Cost = $7.65 million year (c) First find the rate at which heat energy is discharged into the water. If the plant is 15.0% efficient in producing electrical energy then the rate of heat production is Q t W te c = F H G I K J F H G I K J F H G I K J eng W 1 1 1 50 10 1 1 8 50 10 88 . . . . Then, Q t mc T t c = and m tc T Q t c × ⋅° ° 850 10 4186 500 406 10 8 4 . . . Js Jkg C C kg s . P22.59 e T T
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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