Solved: A vapor-compression refrigeration system, using
Chapter 10, Problem 18P(choose chapter or problem)
A vapor-compression refrigeration system, using ammonia as the working fluid, has evaporator and condenser pressures of 30 and \(200 \mathrm{\ lbf} / \mathrm{in.}^{2}\), respectively. The refrigerant passes through each heat exchanger with a negligible pressure drop. At the inlet and exit of the compressor, the temperatures are \(10^{\circ} \mathrm{F}\) and \(300^{\circ} \mathrm{F}\), respectively. The heat transfer rate from the working fluid passing through the condenser is 50,000 Btu/h, and liquid exits at \(200 \mathrm{\ lbf} / \mathrm{in} .^{2}\), \(90^{\circ} \mathrm{F} \text {. }\). If the compressor operates adiabatically, determine
(a) the compressor power input, in hp.
(b) the coefficient of performance.
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