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<font face="Times New Roman, Times, serif"> 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 </font>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:
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<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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><b><span
style="font-family: "Arial","sans-serif"; color: teal;">GHT
Limited<br>
</span></b><b><span style="font-family: "Arial","sans-serif";"><ns0:personname><span
style="color: black;">James Hansen</span></ns0:personname></span></b><b><span
style="color: black;">, PE, LEED AP<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: black;">Senior
Associate</span></b><b><span style="color: black;"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size: 7.5pt; font-family: "Arial","sans-serif";"><ns0:street><ns0:address><span
style="color: black;">1010 N. Glebe Rd, Suite 200</span></ns0:address></ns0:street></span><span
style="color: rgb(31, 73, 125);"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 7.5pt; font-family: "Arial","sans-serif";"><ns0:place><ns0:city><span
style="color: black;">Arlington</span></ns0:city><span
style="color: black;">, </span><ns0:state><span style="color: black;">VA</span></ns0:state><span
style="color: black;"> </span><ns0:postalcode><span
style="color: black;">22201-4749</span></ns0:postalcode></ns0:place></span><span
style="color: black;"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: black;">703-338-5754
(Cell)</span><span style="color: black;"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: black;">703-243-1200
(Office)</span><span style="color: black;"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: black;">703-276-1376
(Fax)</span><span style="color: black;"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family: "Arial","sans-serif"; color: teal;"><a
moz-do-not-send="true" href="http://www.ghtltd.com/"><span
style="font-size: 10pt;">www.ghtltd.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color: rgb(49, 132, 155);"><o:p> </o:p></span></b></p>
</div>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<div>
<div
style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;">
<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 class="moz-txt-link-abbreviated" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" 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 class="moz-txt-link-abbreviated" 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<o:p></o:p></span></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
style="font-size: 12pt; font-family: "Times New Roman","serif";"><br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif";">Design
Engineer / Energy Analyst</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Arial","sans-serif";">Mechanical
Department</span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"><br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif";">LEED®
Accredited Professional</span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"><br>
<br>
</span><a moz-do-not-send="true" href="http://www.glumac.com/"><span
style="font-size: 12pt; font-family: "Times New Roman","serif"; text-decoration: none;"><img
id="Picture_x0020_1" src="cid:part1.08080207.03090908@bellnet.ca"
alt="http://www.glumac.com/glumacsig.gif" border="0" height="41"
width="343"></span></a><o:p></o:p></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div class="MsoNormal"><span
style="font-size: 12pt; font-family: "Times New Roman","serif";">
<hr style="color: rgb(154, 203, 51);" align="left" noshade="noshade"
size="2" width="100%"></span></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><span
style="font-size: 9pt; font-family: "Arial","sans-serif"; color: red;">NOTE
OUR NEW ADDRESS</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 9pt; font-family: "Arial","sans-serif";">18200
Von Karman Ave., Suite 100</span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"><br>
</span><span
style="font-size: 9pt; font-family: "Arial","sans-serif";">Irvine,
CA 92612</span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"><br>
</span><span
style="font-size: 9pt; font-family: "Arial","sans-serif";">T.
949.833.8190 F. 949.833.0252<br>
<br>
</span><b><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(51, 51, 51);">Thinking.
Inside the building.</span></b><span
style="font-size: 9pt; font-family: "Arial","sans-serif";"><br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(51, 51, 51);"><a
moz-do-not-send="true" href="http://www.glumac.com/">www.glumac.com</a></span><span
style="font-size: 12pt; font-family: "Times New Roman","serif";"> </span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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<p align="left"><font size="2"><font face="Tahoma"><font
color="#0000ff">
<hr></font></font><font color="#0000ff"><font color="#000000"><font
face="Arial">The information contained in this communication is
confidential, may be privileged, and is intended only for the use of
the addressee. It is the property of GHT Limited. Unauthorized use,
disclosure or copying of this communication or any part thereof is
strictly prohibited and may be unlawful. If you have received this
communication in error, please notify me immediately by return e-mail
or by e-mail to </font><a moz-do-not-send="true"
href="mailto:ght@ghtltd.com"><font face="Arial">ght@ghtltd.com</font></a><font
face="Arial">, and destroy this communication and all copies thereof,
including all attachments. Thank you.</font></font></font></font></p>
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