Analyzing Cooling Towers
Liquid water at 120°F and a volumetric flow rate of 275 ft3/min enters a cooling tower operating at steady state. Cooled water exits the cooling tower at 90°F. Atmospheric air enters the tower at 86°F, 1 atm, 35% relative humidity, and saturated moist air at 100°F, 1 atm exits the cooling tower. Determine
(a) the mass flow rates of the dry air and the cooled water, each in lb/min.
(b) the rate of exergy destruction within the cooling tower, in Btu/s, for T0 = 77°F.Ignore kinetic and potential energy effects.
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