The capacity of a propane vapor-compression refrigeration system is 8 tons. Saturated vapor at 0°F enters...

The capacity of a propane vapor-compression refrigeration system is 8 tons. Saturated vapor at 0°F enters the compressor, and superheated vapor leaves at 120°F, 180 lbf/in.² Heat transfer from the compressor to its surroundings occurs at a rate of 3.5 Btu per lb of refrigerant passing through the compressor. Liquid refrigerant enters the expansion valve at 85°F, 180 lbf/in.² The condenser is water-cooled, with water entering at 65°F and leaving at 80°F with a negligible change in pressure. Determine

(a) the compressor power input, in Btu/min

(b) the mass flow rate of cooling water through the condenser, in lb/min

(c) the coefficient of performance

Round answers to 3 significant digits.

Expert Solution

samet mamat answered 3 years ago

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