Q3: Q4 A NH3 refrigerator produces 100 tons of ice from water at 00C in a day. The cycle operates between 25°C and -15°C. The vapor is dry saturated at the end of compression. If the COP is 50% of theoretical COP, calculate the power required to drive the compressor. In a refrigerator the power rating impressed on the compressor is 1.2 KW. The circulating wire in evaporator is 5 kW and the cooling water took away 10 kW from condenser coil. The operating temperatures range is 18°C and 0°C and their corresponding latent heats are 170 kJ/kg and 230 kJ/kg and the difference between the liquid energy is 35 kJ/kg. Find the actual COP of the system (2) relative COP, assuming the vapor is just dry and saturated at the end of the compression.