Data for steady-state operation of a

Chapter 10, Problem 23P

(choose chapter or problem)

Data for steady-state operation of a vapor-compression refrigeration cycle with propane as the working fluid are given in the table below. The states are numbered as in Fig. 10.3. The mass flow rate of refrigerant is 8.42 lb/min. Heat transfer from the compressor to its surroundings occurs at a rate of 3.5 Btu per lb of refrigerant passing through the compressor. The condenser is water-cooled, with water entering at \(65^{\circ} \mathrm{F}\) and leaving at \(80^{\circ} \mathrm{F}\) with negligible change in pressure. Sketch the T–s diagram of the cycle and determine

(a) the refrigeration capacity, in tons.

(b) the compressor power, in horsepower.

(c) the mass flow rate of the condenser cooling water, in lb/min.

(d) the coefficient of performance.

                                 

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