solution
Reconsider the cycle of Problem 8.35, but include in the analysis that each turbine stage has an isentropic efficiency of 88% and the pump efficiency is 80%.
Plot each of the quantities calculated in Problem 8.40 versus evaporator pressure ranging from 0.6 to 4 bar, while the condenser pressure remains fixed at 6, 9, and 12 bar.
An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of 20C and a condenser pressure of 12 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The mass flow rate of the refrigerant is 3 kg/min. Determine
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(b) the refrigerating capacity, in tons.
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