a commercial refrigerator with r-134a as the working fluid is used to keep the refrigerated space at -35 c by rejecting 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 50 c and leaves at the same pressure subcooled by 6 c. if the compressor consumes 3.3 kw of power , determine (a) the mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.

At 1.2mpa pressure and 50ca)Mass flow rate of the refrigerantTherefore h1= condenser inlet enthalpy =278.28KJ/Kgsaturation temperature at 1.2mpa is 46.29CTherefore the temperature of the condenser T2 = 46.29C - 5T2 = 41.29CNow,d)power consumed by compressor W = 3.3KWQ4 = QL + w = Q4QL = mR(h1-h2)-W= 0.0498 x (278.26 - 110.19)-3.3=5.074KWHence refrigerator load is 5.74Kg(COP)r = 238/53(Cop) = 4.490Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.https://brainly.com/question/13717268#SPJ4