10-3 - R $ , T = T L , x = 1) (4) P H = P ( R $ , T = T H ,...

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10-3 Equations Set 29 Problem 10-3 abc A Carnot vapor refrigeration cycle operates between thermal reservoirs at 40 F and 90 F. Determine the operating pressures in the condenser and evaporator and the COP for a) R134a, b) propane and c) water T L = ConvertTemp ( F, R, 40 [F]) (1) T H = ConvertTemp ( F, R, 90 [F]) (2) COP = T L T H - T L (3) P L = P (
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Unformatted text preview: R $ , T = T L , x = 1) (4) P H = P ( R $ , T = T H , x = 1) (5) Solution COP = 9 . 993 P H = 0 . 6988 [psia] P L = 0 . 1217 [psia] R $ = water T H = 549 . 7 [R] T L = 499 . 7 [R] Table 1 Run R $ P H P L [psia] [psia] 1 R134a 119.1 49.78 2 propane 165.2 78.65 3 water 0.6988 0.1217...
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