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<p class=MsoNormal><span style='color:#1F497D'>Bruce,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I agree with your theory and the
justification, but the question is ultimately “how to model it?” I don’t think
you can put in negative heat for a baseboard system, hook it up to a chilled
water loop and get results you can count on. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Greg<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> Bruce Easterbrook [mailto:bruce5@bellnet.ca]
<br>
<b>Sent:</b> Friday, April 09, 2010 8:59 AM<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Active Chilled Beam/Fan Coil System<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> I'm not totally up on using DOAS with
eQuest or with chilled beams being in Canada but it would seem to me the OA
will have to be used to control humidity in the space. The chilled beam
should not be used for latent cooling, sensible only, to prevent condensation
issues. The DOAS will need to control the dewpoint of the room air and
maintain it below the operating temperature of the coil in the chilled
beam. The chilled beam would only be dealing with the sensible load from
the space. The DOAS would do everything else. The question would be
will eQuest allow a single zone AHU c/w economizer and a baseboard system with
negative heat? I have never tried that with eQuest.<br>
Bruce Easterbrook<br>
Abode Engineering<br>
<br>
On 08/04/2010 04:46 PM, James Hansen wrote: <o:p></o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>I’m interested in this as well –
I know that in DOAS systems like active chilled beams, the primary air often takes
on a fairly large chunk of space latent cooling, and if this can’t be passed on
from the DOAS system to the space, then I don’t see how we can believe the
results.</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif";color:teal'>GHT
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</span></b><b><span style='font-family:"Arial","sans-serif"'>James Hansen</span>,
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a
href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Greg Collins<br>
<b>Sent:</b> Thursday, April 08, 2010 4:39 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Active Chilled Beam/Fan Coil System</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>Hi all,<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>I’m working on modeling an active chilled beam system.
It consists of the chilled beams and a dedicated unit to provide primary air
(mainly ventilation air) to the beams at 55 degrees. I’ve modeled the
chilled beam system as a fan coil system, but am wondering about my options for
modeling the primary air. <o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>My question is this: If I attach the
primary/ventilation air unit to the fan coil system in the FC’s Outdoor Air tab
under “Outside Air from System” will the temperature of the air coming from
that unit have an impact on the load in the space? I have a ton of hours
at very low load during the winter months, and I want eQuest to use the 55
degree primary air as the first stage of cooling for the space and not “double
up” the cooling energy by cooling the 55 degree air and then not use that for
cooling in the zones.<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>If anybody has some input, it would be appreciated. <o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Greg
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</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Design
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<pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>Equest-users mailing list<o:p></o:p></pre><pre><a
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