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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff 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><FONT face=Arial color=#0000ff size=2></FONT> </DIV><!-- Converted from text/rtf format -->
<P><SPAN lang=en-us><FONT face=Arial></FONT></SPAN> <BR><SPAN
lang=en-us><B><FONT face=Arial color=#0000ff size=2>John Grando</FONT><FONT
face=Arial size=2> </FONT><FONT face=Arial color=#0000ff size=2>LEED
AP</FONT><FONT face=Arial size=2>| </FONT><FONT face=Arial color=#808080
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 lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Greg Collins [mailto:GCollins@glumac.com]
<BR><B>Sent:</B> Friday, April 09, 2010 2:00 PM<BR><B>To:</B> Bruce
Easterbrook<BR><B>Cc:</B> equest-users@lists.onebuilding.org<BR><B>Subject:</B>
Re: [Equest-users] Active Chilled Beam/Fan Coil System<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<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>
<DIV>
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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 [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></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: #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>
<DIV>
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Limited<BR></SPAN></B><B><SPAN style="FONT-FAMILY: 'Arial','sans-serif'">James
Hansen</SPAN>, PE, LEED AP</B><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
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></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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