A. R-134a is used in an ideal vapor refrigeration cycle operating between saturation temperature 0f -20 °C in the evaporator and 39.39 °C in the condenser. Calculate the rate of refrigeration, the coefficient of performance, and the HP per ton it the refrigerant flow is 0.6 Kg/s. Also determine the COP if the system is used as a heat pump.


Part (B): Redo part (A) with actual operating effects.
Treefrog leavening evaporator= -13 °C
Treefrog leaving the condenser is subcooled to 38 °C
The compressor is 80% efficient
Calculate the actual rate of refrigeration and coefficient of performance.