R-134a Refrigerant Facts & Info Sheet - Refrigerant HQ

A refrigerator uses refrigerant-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. The refrigerant enters the evaporator at 120 kPa with a quality of 34 percent and leaves the compressor at 70^∘ C. If the compressor consumes 450 W of power, determine (a) the mass flow rate of the refrigerant, ( b ) the condenser pressure, and ( c ) the COP of the refrigerator. | Numerade

A commercial refrigerator with refrigerant- 134 a as the working fluid is used to keep the refrigerated space at -30^∘ C by rejecting its waste heat to cooling water that enters the condenser at 18^∘ C at a rate of 0.25  kg / s and leaves at 26^∘ C . The refrigerant enters the condenser at 1.2 MPa and 65^∘ C and leaves at 42^∘ C. The inlet state of the compressor is 60 kPa and -34^∘ C and the compressor is estimated to gain a net heat of 450  W from the surroundings. Determine (a) the quality of