[Equest-users] Hours floating when fans on

Steven Gates stvgates at pacbell.net
Tue Jul 28 15:47:58 PDT 2009

Make sure the minimum flow ratio matches what the boxes actually do, rather
than being allowed to default.  Also, if hydronic reheat, are you simulating
the piping losses?  In many cases the thermal losses of piping can be 1x-3x
larger than the actual reheat end-use load.



From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
James.Souffrant at tac.com
Sent: Tuesday, July 28, 2009 12:01 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Hours floating when fans on


Would anyone have any suggestions for how to decrease the amount of time a
system spends floating?  I am modeling a VAV reheat system, with 24 hr
heating availability, space heating set point 74 occupied /unoccupied,
throttling range of 1 degree.  I am unable to simulate enough heating during
the summer to reflect actual usage and I believe most of it is being lost
during these time periods.  I have attached a pdf of the specific system SIM
file.  Specific months of reference are May-Nov.




James Souffrant, EIT
Engineer I, Project Development and Engineering



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