Direct Evaporative Humidifier/Cooler
By S. Gabel and M. Brandemuehl
Revised for TRNSYS by N. Blair and R. Schwarz

      	This model was adapted strictly for use with the TRNSYS Program by
the Solar Energy Laboratory.

	This subroutine calculates the leaving air temperature and humidity
ratio using an adiabatic saturation effectiveness model.  This model 
represents an air stream passing over a pan of water or over a porous 
medium, adiabatically increasing the humidity and decreasing the temperature
of the air.  The temperature of the water is assumed to be equal to the leaving
temperature of the humidified air.

REF: A Toolkit for Secondary HVAC System nergy Calculations  May 25,1992
     Joint Center for Energy Management  University of Colorado at Boulder