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A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid...

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Mechanical Engineering

A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid refrigerant at 40 ℃ leaving the condenser and entering
the heat exchanger is used to superheat the saturated vapor refrigerant leaving the evaporator at 7 ℃ by 8 ℃. If the compressor is capable of pumping 5 1/s of vapor refrigerant measured
at the inlet to the compressor and the compression processes are considered isentropic in both cases listed below, determine;


(a) The refrigerating capacity in kW, the compressor power in kW, and the COP of the system in the absence of the heat exchanger.
(b) The refrigerating capacity in tons refrigeration, the compressor horsepower, and the COP of the system in the presence of the heat exchanger.

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