A large refrigeration system uses ammonia as the refrigerant. The compressor, with an isentropic efficiency of 90%,

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A large refrigeration system uses ammonia as the refrigerant. The compressor, with an isentropic efficiency of 90%, requires 150 kW. The ammonia enters the compressor at 120 kPa as a saturated vapor and leaves the compressor at 800 kPa. It leaves the condenser very close to the saturated liquid state. If the cooling load is 600 kJ/s. determine:
(i) The mass flow rate of ammonia
(ii) The rate of heat rejection by the con-denser
(iii) The coefficient of performance for this system
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Thermodynamics for Engineers

ISBN: ?978-1133112860

1st edition

Authors: Kenneth A. Kroos, Merle C. Potter

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