Considering Air-Conditioning Applications Figure P12.82 shows a compressor follow...

Considering Air-Conditioning Applications

Figure P12.82 shows a compressor followed by an aftercooler. Atmospheric air at 14.7 lbf/in.², 90°F, and 75% relative humidity enters the compressor with a volumetric flow rate of 100 ft³/min. The compressor power input is 15 hp. The moist air exiting the compressor at 100 lbf/in.², 400°F flows through the aftercooler, where it is cooled at constant pressure, exiting saturated at 100°F. Condensate also exits the aftercooler at 100°F. For steady-state operation and negligible kinetic and potential energy effects, determine

(a) the rate of heat transfer from the compressor to its surroundings, in Btu/min.

(b) the mass flow rate of the condensate, in lb/min.

(c) the rate of heat transfer from the moist air to the refrigerant circulating in the cooling coil, in tons of refrigeration.