A wet cooling tower is to cool 25 kg/s of cooling water from 40 to 30oC at

Question:

A wet cooling tower is to cool 25 kg/s of cooling water from 40 to 30oC at a location where the atmospheric pressure is 96 kPa. Atmospheric air enters the tower at 20oC and 70 percent relative humidity and leaves saturated at 35oC. Neglecting the power input to the fan, determine
(a) The volume flow rate of air into the cooling tower.
(b) The mass flow rate of the required makeup water.