Text 2-2 A counter-flow cooling tower cools 2000 gal/min water from 104F to 85F with 210,000 ft/min of air at 90F dry-bulb and 76F wet-bulb temperatures. The mass transfer coefficient-surface area product hA = 123 Ibm/hr-ft and the air mass flow rate per unit cross-sectional area of the cooling tower is malA = 1800 Ibm/hr-ft. Determine the numerical values of the cooling tower (a) volume and height, (b) effectiveness, and (c) outlet air temperature and relative humidity [Answers: Volume, V = 150 m, Height, L = 3 m, & = 0.5, T, = 92.1F, = 0.72].