DOE 2.1 DX Coil Performance Calculations
By 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 performance of a DX cooling coil
using the default correlations of the DOE 2.1 building system simulation
program.  The routine determines the total capacity, sensible heat ratio
and coefficient of performance for a coil given the rated performance,
entering air temperature and humidity ratio, outdoor temperature and the
ratio of evaporator airflow rate to rated airflow.  The correlations do not
account for indoor fan energy effects.  Sample values (generated by TRNSYS 
Debug) are included in the source code.

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