8esm_05_51

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PROBLEM 5.51 Tamb = TH = 293 K An inventor claims to have developed a food freezer that at steady state requires a power input of 0.6 kW to extract energy by heat transfer at a rate of 3000 J/s from freezer Qin = contents at 270 K. Evaluate this claim for an ambient temperature of 293 K. = 3000J s B≤ 1KJ Qin Tc 270 IN Weycle 293-270 The claim is in accord 5≤ 11.74 with the second law. 1 1. While operation is in accord with the second law, a more indepth analysis might reveal practical and/or economic shortcomings.