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Do Problem 9.21 with ammonia as the working fluid.

Problem 9.21

A supply of geothermal hot water is used as the energy source in an ideal Rankine cycle with R-134a, as shown in Fig. P9.21. Saturated vapor R-134a leaves the boiler at a temperature of 85?C, and the condenser temperature is 40?C.

1424_e6242fa6-7df8-4747-b2a7-a4cbaa9f314f.png

Calculate the thermal efficiency of this cycle.

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