30 tons of ice Add 0°C produced in a day of 24 hours by an ammonia refrigerator the temperature range and the compressor is from 298 Kelvin to 250 K vapor is dry saturated at the end of compression and expansion valve is used .assume a coefficient of performance of 60% of the theoretical and calculate the power in kilowatts required to drive the compressor latent heat of ice is 334.72 kJ per kilogram .72 kJ per kilogram kilogram