A refrigeration machine is required to produce i.e., at 0C from water at 20C. The machine has a condenser temperature of 298 K while the evaporator temperature is 268 K. The relative efficiency of the machine is 50% and 6 kg of Freon-12 refrigerant is circulated through the system per minute. The refrigerant enters the compressor with a dryness fraction of 0.6. Specific heat of water is 4.187 kJ/kg K and the latent heat of ice is 335 kJ/kg. Calculate the amount of ice produced on 24 hours. The table of properties of Freon-12 is given below : Temperature K 298 268 Liquid heat kJ/kg 59.7 31.4 Latent heat kJ/g 138.0 154.0 Entropy of liquid kJ/kg 0.2232 0.1251