[BLDG-SIM] Mysterious eQuest result..

[Aulbach, John]

Has anyone had this problem?

I have two 215 ton VFD centrifugal chillers running in an office building in Salt Lake City (in eQuest, that is). I have the setpoint temp set to 80°F, the setpoint control to Load-Rest, the Max Rest Temp to 95°F, and the Min rest temp to 70°F. The latter is required for an ASHRAE-90.1-2001 Base Case model.

I reset the Min reset temp to 50°F, per manufacturer's telling me I could do so, to take advantage of colder .

To my utter amazement, the heat rejection kWh went up 10 TIMES !! Same chiller, same everything else (as far as I know).

Am I doing this correctly? What is happening?

John R. Aulbach, PE, CEM
Project Manager
Nexant, Inc.
100 North Barranca, Suite 820
West Covina, CA 91791 USA
Phone: 626-430-9054
Fax: 626-430-9060
email: jaulbach at nexant.com
 

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