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eQuest (DOE2.2) and DOE2.1 don't model air flow so you have to make some
assumptions based on the design of the underfloor system in
question. You can't outright take a credit for lower fan energy
unless the designer actually design a lower fan static system. Many
underfloor systems use a higher supply temperature (69F instead of 55F)
but that has to be confirmed for your case. In come climates the humidity
dictates that you need to supply at lower than 69F. Some claim that you
can model with a higher space setpoint temperature due to the
stratification of temperatures but that depends on the type of diffusers
and the ceiling height in question. Most North American underfloor
systems use a Krantz style diffuser which mixes in the zone level.
This is not a true displacement ventilation system. <br><br>
I have seen underfloor designs which save energy and I have seen some
that use more energy due to the particular design. You need to
confirm what the designer is specifying.<br><br>
<br>
<blockquote type=cite class=cite cite>Hi,<br>
I'm trying to model an underfloor air system in eQUEST for a project that
I am doing. Its an office building. What is the best way to go about it?
What would the reduction in static pressure on the fans be?<br>
<br>
Thanks<br>
<br><br>
<font color="#800000">Vikram Sami</font><font size=2><br>
</font><font size=1><i><br>
</font><font size=2>ENSAR Group, Inc.<br>
2305 Broadway<br>
Boulder, C0 80304<br>
(303).449.5226 Tel<br>
(303).449.5276 Fax<br><br>
</i></font><br>
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<br>
Chris Jones, P. Eng.<br>
14 Oneida Avenue<br>
Toronto, ON M5J 2E3<br>
Tel. 416 203-7465<br>
Fax. 416 203-8249<br><br>
<br>
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