Consider the vapor-compression refrigeration cycle of Fig. 9.1 with tetrafluoroethane as refrigerant (Table 9.1, Fig. G.2). If

Question:

Consider the vapor-compression refrigeration cycle of Fig. 9.1 with tetrafluoroethane as refrigerant (Table 9.1, Fig. G.2). If the evaporation temperature is 10(°F), show the effect of condensation temperature on the coefficient of performance by making calculations for condensation temperatures of 60, 80, and 100(°F).
(a) Assume iscntropic compression of the vapor.
(b) Assume a compressor efficiency of 75%.