You must know that we can evaluate the heat evacuated from a wet cooling tower by two mays. the first from the way "water" the second from "air". Try to see the merkel's equation it's the best way to understood very well how it can help you resolving your problem.In the case...
I need your help to obtain a document (.pdf or.doc), concerning the two coefficients identifying pakings used in a counter current flow, in wet cooling towers.