1. (25 points) In a vapor-compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at -22oC. The refrigerant enters the condenser at 16 bar and 160oC, 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 150 kW, determine (a) the mass flow rate of refrigerant, in kg/s. (b) the power input to the compressor, in kW. (c) the coefficient of performance. (d) the isentropic compressor efficiency.