[Bldg-sim] Dedicated Outside Air

[Kevin Kyte]

Take the fan energy from the DOAS and put it in with the systems it serves
under supply kw/flow.  That is about all you can do.

Kevin Kyte, LEED AP
RobsonWoese, Inc.
(T) 716-636-1800
(F) 716-636-1856
http://robsonwoese.com

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Tim Johnson
Sent: Friday, February 01, 2008 10:17 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Dedicated Outside Air

I am working on a 70,000 sq ft health sciences building.  This building has
a wide range of room types, from lecture halls of 90 people to simulation
labs and offices with maybe one or two people.  I am using eQuest to model
this building for LEED.  The proposed system for this building is a two part
system.  The main air handler is a cooling only VAV.  We also have a second
air handler for outside air.  These two ducted systems mix at each zone
where there is a reheat coil.  Is there a way to model this type of system
in eQuest?  The DCV settings are either set by critical zone or by return
air.  Neither of these is an accurate representation of the existing system.
We will likely have situations where the lecture halls will be receiving
100% outside air while other rooms need only a small fraction of OA.  I have
seen mention of dummy zones, but this doesn't seem like an accurate method
to me.  Please let me know if you have any tips on this.

Thank you,

Tim Johnson
Mechanical EIT
(208)557-5645
timj at ctagroup.com

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