[BLDG-SIM] eQuest - error CHW temp vs. LAT

Alec Stevens astevens at dmiinc.com
Thu Oct 18 15:39:05 PDT 2007


eQuest is giving us an error when modeling a chiller plant that has a high
delta-T.  The chilled water temps are 41ºF / 57ºF, and the anticipated
discharge temp off the coil is 55ºF.  This would be accomplished by a
relatively deep coil.  eQuest does not like the fact that the return CHW
Temp is higher than the leaving air temp.  It would like to see at least a
6ºF approach between the two.  


Any suggestions on how to satisfy eQuest while maintaining a good simulation
of the CHW pumping energy and chiller compressor performance?


Thanks for any suggestions.


Alec Stevens, PE, LEED AP

35 Walnut Street, Wellesley, MA 02481
p: 781-431-1100 x11 f: 781-431-1109
e: astevens at dmiinc.com


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