A refrigerator uses R-134a as the working fluid. The steady mass flow rate through each component is 0.1 kg/s, and the power input to the compressor is 5.0 kW. The following data are known:
P1 = 100 kpa T1= −20∘C
P2= 800 kpa T2=50∘C
T3= 30∘C X3=0
T4=−25∘C
Determine the following:
a) The quality at the evaporator inlet
b) The rate of heat transfer to the evaporator
c) The rate of heat transfer from the compressor
d) The rate of heat transfer from the condenser
e) The coefficient of performance of the refrigerator
f) If this cycle is used as a heat pump, determine is COP