Question: A cascade system is composed of two ideal refrigeration cycles. The high-temperature cycle uses R-22. Saturated liquid leaves the condenser at 40C, and saturated vapor

A cascade system is composed of two ideal refrigeration cycles. The high-temperature cycle uses R-22. Saturated liquid leaves the condenser at 40C, and saturated vapor leaves the heat exchanger at 20C. The low-temperature cycle uses a different refrigerant, R-23 (Fig. G.3 or the software) Saturated vapor leaves the evaporator at 80C, and saturated liquid leaves the heat exchanger at 10C. Calculate the ratio of the mass flow rates through the two cycles and the coefficient of performance of the system.

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