ammonia
I only need help with letter (e).
In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22°C. The refrigerant enters the condenser at 16 bar and 190°C, and saturated liquid exits at 16 bar. There is no significant heat transfer between the compressor and its surroundings, and the refrigerant passes through the evaporator with a negligible change in pressure.
If the refrigerating capacity is 50 kW, determine:
(a) the mass flow rate of the refrigerant, in kg/s.
(b) the power input to the compressor, in kW.
(c) the coefficient of performance.
(d) the isentropic compressor efficiency, in percent.
(e) the rate of entropy production, in kW/K, for the compressor.
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