Work Sheet 1 Cooling Tower Question 1: A forced draft countercurrent water cooling tower is to cool water from 43.3 to 26.7 °C. The air enters the bottom of the tower at 23.9 °C with a wet bulb temperature of 21.1 °C. The value of He for the flow condition is He 0.533 m. the heat transfer resistance in the liquid phase hy very high compared to mass transfer coefficient in the gas phase. Calculate the tower height needed if 1.5 times the minimum air rate is used.