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<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2>Dear Jason,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2>Assuming that you've got the campus HVAC wired to a BMS,
I'd consider gathering data and doing a regression analysis using key parameters
to predict energy or load.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2>There are hundreds of variables which affect actual load,
including poorly calibrated sensors, leaking control valves, etc. which are not
well addressed by ANY modeling software. On the other hand, you already
have the actual usage data and can get concurrent weather data. even
assuming that you'll spend significant time tuning the regression, I think
you'll be MANY hours ahead and have a more accurate model from which to make
improvements.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=078514416-03032009><FONT face=Arial
color=#0000ff size=2>p.s., I'm no stats wizard. If you aren't either,
there are many on a typical University campus that would probably love a
real problem to solve....</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV class=Section1>
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><B
style="mso-bidi-font-weight: normal"><FONT size=4>The Building Performance
Team<BR></FONT></B><B style="mso-bidi-font-weight: normal">James V. Dirkes II,
P.E., LEED AP<BR></B>1631 Acacia Drive NW<BR>Grand Rapids, MI 49504<BR>616
450 8653<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV> </DIV><BR>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
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<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Sparks,
Jason<BR><B>Sent:</B> Tuesday, March 03, 2009 10:46 AM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] Chilled Water
Loop / Bldg Modeling<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>I’ve been tasked with finding a software package that can
model our chilled water system. We have a district plant that
distributes chilled water to many buildings on our campus. My specific
task is to model the chilled water system of one specific building, then those
results will determine if we continue looking for a different software
package, or proceed to model the other buildings. Pretty much they want
a computer model of the buildings chilled water system that can predict the
chilled water flow requirements for each AHU & the total building as a
function of the buildings chilled water supply temperature, outside air
conditions, and air handling unit flow rates.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I’m looking at eQuest & EnergyPlus (as they’re the only
free options I’ve found so far to play with), and I’d really like some
opinions/suggestions on how to proceed.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Jason<o:p></o:p></P></DIV>
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