3. A refrigerator uses R-134a as the working fluid and operates on an ideal vapor –compression refrigeration cycle between 0.12 and 0.8 MPa. Sketch and number a diagram of the

refrigerator. Sketch and number the process on a T-s diagram. If the mass flow rate of the refrigerant is 0.05 kg/s, determine the rate of heat removal from the refrigerated space in (kW), the power input to the compressor in (kW), and the COP of the refrigerator. Assume a saturated vapor at the exit of the evaporator and a saturated liquid at the exit of the condenser.