[Bldg-sim] eQuest Coil Temperature Differential
Eric Studer
estuder at dmiinc.com
Mon Jan 14 09:30:47 PST 2008
Hello,
eQuest allows users to specify loop and coil design temperature
differentials, and yet it appears that these setpoints are not maintained
within the program. For example, I can specify a hot water loop temperature
differential of 25°F and specify that all the coils are selected at 25°F,
yet the hourly temperature differentials are typically 40°F even when the
supply hot water temperature is held constant at the design temperature
throughout the year. With 2-way control valves it seems as though the
temperature differential across the coils should remain within several
degrees of 25°F. Do you agree?
The impact of the high coil/loop differential temperatures is the
underestimate of pump energy.
I posted a question similar to this in October and did not get a response,
so your input is greatly appreciated!
Thanks for your time,
Eric
Eric Studer, PE, LEED AP
DMI
35 Walnut Street
Wellesley, MA 02481
Ph: (781) 431-1100 ext 12
Fax: (781) 431-1109
e-mail: estuder at dmiinc.com
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