33.3-9. Dehumidification of Air. Air having a dry bulb temperature of 37.8C and a wet bulb temperature of 26.7C is to be dried by first cooling to 15.6C to condense water vapor and then heating to 23.9C. (a) Calculate the initial humidity and percentage humidity. (b) Calculate the final humidity and percentage humidity. (Hint: Locate the initial point on the humidity chart. Then, go horizontally (cooling) to the 100% saturation line. Follow this line to 15.6C. Then, go horizontally to the right to 23.9C.] Ans. (b) H = 0.0115 kg H2O/kg dry air, Hp = 60% nn adiabatic cooling chamber has a