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Thanks John, chilled beams are also called induction diffusers.<br>
Bruce<br>
<br>
On 09/04/2010 03:59 PM, Grando, John wrote:
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<div dir="ltr" align="left"><font color="#0000ff" face="Arial"
size="2"><span class="312045819-09042010">Have you looked into SYSTEM
TYPE = IU (Induction Unit). This may be a better path to try.</span></font></div>
<div> </div>
<!-- Converted from text/rtf format -->
<p><span lang="en-us"></span> <br>
<span lang="en-us"><b><font color="#0000ff" face="Arial" size="2">John
Grando</font><font face="Arial" size="2"> </font><font color="#0000ff"
face="Arial" size="2">LEED AP</font><font face="Arial" size="2">| </font><font
color="#808080" face="Arial" size="2">Mechanical Engineer</font><br>
</b></span><span lang="en-us"><br>
</span><br>
<span lang="en-us"><font face="Arial"> </font></span> </p>
<div> </div>
<br>
<div class="OutlookMessageHeader" dir="ltr" align="left" lang="en-us">
<hr tabindex="-1"><font face="Tahoma" size="2"><b>From:</b> Greg
Collins [<a class="moz-txt-link-freetext" href="mailto:GCollins@glumac.com">mailto:GCollins@glumac.com</a>] <br>
<b>Sent:</b> Friday, April 09, 2010 2:00 PM<br>
<b>To:</b> Bruce Easterbrook<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Active Chilled Beam/Fan Coil System<br>
</font><br>
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<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Bruce,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">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: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);">Greg<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; color: windowtext; font-family: 'Tahoma','sans-serif';">From:</span></b><span
style="font-size: 10pt; color: windowtext; font-family: 'Tahoma','sans-serif';">
Bruce Easterbrook [<a class="moz-txt-link-freetext" href="mailto:bruce5@bellnet.ca">mailto:bruce5@bellnet.ca</a>] <br>
<b>Sent:</b> Friday, April 09, 2010 8:59 AM<br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] Active Chilled Beam/Fan Coil System<o:p></o:p></span></p>
</div>
</div>
<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: rgb(31, 73, 125);">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: rgb(31, 73, 125);"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">From:</span></b><span
style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"> <a
moz-do-not-send="true"
href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a moz-do-not-send="true"
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 moz-do-not-send="true"
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>
</div>
</div>
<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: 10pt; font-family: 'Arial','sans-serif';">Greg
Collins</span></b><span
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