. A 30-in. cellular-filled countercurrent cooling tower was designed for a 10F approach temperature and a 17F cooling interval when the wet bulb temperature is 75F. The cross section of the tower is 36x36 ft, and the air and water flow rates are 523,000 cfm (at 90F) and 6000 gpm. to) What is the enthalpy of the air at the inlet and the enthalpy change through the tower? b) Calculate and for these conditions, c) How much more padding would be necessary if the wet bulb temperature outside 78F and the desired approach temperature outside 7F