Answer: A vapor-compression refrigeration cycle with

Chapter 10, Problem 27P

(choose chapter or problem)

A vapor-compression refrigeration cycle with Refrigerant 134a as the working fluid operates with an evaporator temperature of \(50^{\circ} \mathrm{F}\) and a condenser pressure of \(180 \mathrm{\ lbf} / \mathrm{in} .^{2}\) Saturated vapor enters the compressor. Refrigerant enters the condenser at \(140^{\circ} \mathrm{F}\) and exits as saturated liquid. The cycle has a refrigeration capacity of 5 tons. Determine

(a) the refrigerant mass flow rate, in lb/min.

(b) the compressor isentropic efficiency.

(c) the compressor power, in horsepower.

(d) the coefficient of performance.

Plot each of the quantities calculated in parts (b) through

(d) for compressor exit temperatures varying from \(130^{\circ} \mathrm{F}\) to \(140^{\circ} \mathrm{F}\).

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