1. A vapour compression refrigeration unit using CFC12 operates between an evaporator temperature of 245 K and a condenser temperature of 306 K. The power input to the compressor is 55 kW. Determine the (i) Cooling capacity (ii) COP of system (iii) COP of ideal Carnot refrigerator for the system

Additional data:

Enthalpy of saturated vapour at 245 K = 176.7 kJ/kg

Enthalpy of saturated liquid at 306 K = 71.23 kJ/kg

Enthalpy of superheated vapour at 306

K = 204.2 kJ/kg