Refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at 120 kPa with a quality of 20 percent and leaves at 120 kPa and 20°C. If the compressor consumes 450 W of power and the COP the refrigerator is 1.2, determine
(a) The mass flow rate of the refrigerant and
(b) The rate of heat rejected to the kitchen air.

Transcribed Image Text:

QH Condenser ▽Expansion Compressor E←- valve in Evaporator 120 kPa x= 0.2 120 kPa -20°C er