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<DIV dir=ltr align=left><SPAN class=225191722-05112008><FONT face=Arial
color=#0000ff size=2>Rishi:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=225191722-05112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=225191722-05112008><FONT face=Arial
color=#0000ff size=2>In general, eQuest (DOE-2) cannot model two systems in one
space, regardless if they ran at serrate times. I was thinking you could perform
the ventilation with gas boiler heat by a Unit Ventilator (allows outside air
introduction), then try the floor heating with baseboard radiation (baseboards
are allowed in many systems). However, you cannot assign any geothermal source
to baseboard heating. You MAY want to make the baseboards electric in the model,
then somehow translate the needed load for this system into what the
geothermal can contribute, and what it can't.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=225191722-05112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=225191722-05112008><FONT face=Arial
color=#0000ff size=2>
<DIV align=left>
<DIV align=left><FONT color=#0000ff>John R. Aulbach, PE, CEM</FONT></DIV>
<DIV align=left><FONT face=Arial size=2><EM>Project Manager</EM></FONT></DIV>
<DIV align=left><FONT face=Arial size=2><FONT color=#0000ff>Nexant,
Inc</FONT>.</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>701 West Kimberly Ave., Suite
245</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Placentia, CA 92870-6342
USA</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Phone: 714-524-4402</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Fax: 714-524-4407</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>email: <A
title=mailto:jaulbach@nexant.com
href="mailto:jaulbach@nexant.com">jaulbach@nexant.com</A></FONT></DIV>
<DIV> </DIV></DIV>.</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Poddar,
Rishi<BR><B>Sent:</B> Wednesday, November 05, 2008 2:06 PM<BR><B>To:</B>
equest-users@lists.onebuilding.org<BR><B>Subject:</B> [Equest-users] Multiple
HVAC systems in a single zone<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">To all the knowledgeable eQuest
users,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I am working on a design for an
institutional building. Each room in the building is its own zone. The rooms
will have in floor heating connected to a geothermal loop as well as a forced
air system which will primarily provide the required ventilation, but also
heating from a supplemental gas boiler. The core of the building will only be
serviced by the forced air system. I believe this can be done in eQUEST but I am
not sure how. The main question, is it possible to define two HVAC systems
for a single zone? Two possible operation models, one system operates at certain
times of the day, the other works at different times of the day. The other
operation model is one system works up to a certain percentage of the
requirement, and the second system meets the remaining demand. I believe
“equipment controls” can handle this, but I’m not sure how to set it
up.<o:p></o:p></SPAN></FONT></P>
<P><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Sincerely,<o:p></o:p></SPAN></FONT></P>
<P style="MARGIN: 0in 0in 0pt"><B><FONT face=Arial color=navy size=3><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 12pt; COLOR: navy; FONT-FAMILY: Arial">Rishi
Poddar</SPAN></FONT></B><FONT face=Arial color=navy><SPAN
style="COLOR: navy; FONT-FAMILY: Arial"><BR>Project Development
Specialist<BR><BR><STRONG><B><I><FONT face=Arial><SPAN
style="FONT-STYLE: italic; FONT-FAMILY: Arial">Ameresco Canada
Inc.</SPAN></FONT></I></B></STRONG></SPAN></FONT><FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P></DIV><PRE> **************************************************************************************
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