Refrigerant-134a enters the compressor of a refrigerator at 0.14MPa and -10°C at a rate of 0.05 kg/s and leaves at 0.8 MPa and 50°C. The refrigerant is cooled in the condenser to 26°C and 0.72 MPa and is throttled to 0.15 MPa. Determine (a) the rate of heat removal from the refrigerated space and the power input to the compressor, (b) the isentropic efficiency of the compressor, and (c) the coefficient of performance of the refrigerator. Answers: (a) 7.93 kW, 2.02 kW, (b) 0.939, (c) 3.93

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