Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 55°C at a rate of 0.018 kg/s and leaves at 750 kPa sub cooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 4°C. Determine
(a) The isentropic efficiency of the compressor,
(b) The rate of heat supplied to the heated room, and
(c) The COP of the heat pump. Also, determine
(d) The COP and the rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kPa.

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왜 800 kPa 750 kPa 55°C Condenser Expansion valve Compressor Evaporator