Question: A two-evaporator compression refrigeration system like that in Fig. P11-60 uses refrigerant-134a as the working fluid. The system operates evaporator 1 at 30 psia, evaporator

A two-evaporator compression refrigeration system like that in Fig. P11-60 uses refrigerant-134a as the working fluid. The system operates evaporator 1 at 30 psia, evaporator 2 at 10 psia, and the condenser at 180 psia. The cooling load for evaporator 1 is 9000 Btu/h and that for evaporator 2 is 24,000 Btu/h. Determine the power required to operate the compressor and the COP of this system. The refrigerant is saturated liquid at the exit of the condenser and saturated vapor at the exit of each evaporator, and the compressor is isentropic.

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