[Equest-users] Multizone heating question

Daly, Matt Matt.Daly at wesd.org
Thu Dec 11 10:56:35 PST 2008

Yes, where is your weather file?
My guess is, your chilled air stream needs to be mixed with heated air to raise it to a proper zone temperature.

Matt Daly * Project Manager * Willamette ESD
2611 Pringle Road SE * Salem, OR 97302
503-385-4693 * fax 503-540-2959
matt.daly at wesd.org<mailto:matt.daly at wesd.org>

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Karen Walkerman
Sent: Thursday, December 11, 2008 10:37 AM
To: Marcus Eliason
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Multizone heating question

I'm happy to look at your inp file, but I can't open it with eQuest.  My initial guess is that you have a pilot on all summer, or that your boiler is cycling at an inefficient part load ratio in response to small demands.

On Thu, Dec 11, 2008 at 1:25 PM, Marcus Eliason <meliason at essexco.com<mailto:meliason at essexco.com>> wrote:


I am modeling an existing building with multizone air handlers with chilled
water coils for cooling and hot water coils for heating.  The hot water is
generated by a gas furnace.  I am seeing some discrepancies in my gas usage
from actual to the simulation.  In the actual building, the gas usage is
only  high in the winter months (the building is in the south) and is next
to nothing in summer months.  I have tried all the various methods of coil
control under the "heating" tab and cannot get the simulation to reflect the
real life usage.  Does anybody have any ideas on how to control the heating
better?  Representative files are attached.

Marcus Eliason

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