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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Vaughn,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>First, a caveat: I typically do modeling for
commercial/institutional projects, so my assumptions are likely to be different
from yours.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>eQuest shows the DHW loop as closed, so no worries. The
important thing is to be confident in the DHW loop process load number and the
other parameters you've used for the circ loop and DHW heater.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>There is only a small amount of gas burned in January for two
reasons that I can see:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You have the baseboards set to thermostatic control, which means
they are the first stage of heating. Only when space heating loads are
not met by the combination of baseboards and internal space heat gain will the
furnace add heat.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You have entered fairly significant internal loads, gas cooking
stoves for one. The model doesn't appear to have any exhaust, and
transfers all of the cooking heat to the space. If there are kitchen
exhaust fans, some portion of the heat will be transferred out of the space.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Some things to look at:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Your DHW HIR value - are you confident in this number?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Double check your schedules<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>DHW circulation pump<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>DHW process load<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Gas stove heat output, sensible/latent ratio, & proportion
transferred to the space?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Double check your schedules<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Are your baseboard valves 2 way or 3 way?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Do your space setpoints match your heat and cool schedules?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Furnace system night cycle control is set to off. Probably
should be on?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Why is the furnace schedule off during the day?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The roof appears to have no insulation. Correct?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Double check your schedules (notice a trend?)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Have a look at your .sim files to get a sense of what is going
on.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Steven<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Synergy Team
[mailto:synergydesignteam@gmail.com] <br>
<b>Sent:</b> Tuesday, June 15, 2010 10:18 AM<br>
<b>To:</b> ssavich@systemswestengineers.com<br>
<b>Subject:</b> Re: [Equest-users] Help<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Hi Steve,<br>
<br>
Thanks for the response. Attached are the requested files. We are
actually now able to simulate building performance, however, i'm not sure that
the DHW loop should be indicated as a closed loop on the diagram and when we
run the simulation, the graph indicates that there is only a small amount of
natural gas burnt in January for space heating and nothing for subsequent
months? Any tricks, advice, suggestions would be helpful. <br>
<br>
Thanks!<br>
<br>
Vaughn Slovak<br>
Architectural Designer<br>
Synergy Design<br>
p. 845.255.1733<br>
f. 845.255.1694 <o:p></o:p></p>
<div>
<p class=MsoNormal>On Tue, Jun 15, 2010 at 12:32 PM, Steven Savich <<a
href="mailto:ssavich@systemswestengineers.com">ssavich@systemswestengineers.com</a>>
wrote:<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>Please include .pd2 and .inp files.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt'>From:</span></b><span style='font-size:10.0pt'> <a
href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org"
target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of
</b>Synergy Team<br>
<b>Sent:</b> Tuesday, June 15, 2010 9:22 AM<br>
<b>To:</b> <a href="mailto:eQUEST-users@onebuilding.org" target="_blank">eQUEST-users@onebuilding.org</a><br>
<b>Subject:</b> [Equest-users] Help</span><o:p></o:p></p>
</div>
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<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>
We are trying to perform an energy audit using eQuest 3-63 on a 2 Story
multi-family structure located just north of New York City in Westchester
County. This particular building has four 3-bedroom apartment units side by
side each with it's own small boiler room which contains a single natural gas
burning instantaneous hot water boiler serving both space heating as well as
domestic hot water demand. This is a standard system and I feel that eQUEST
should have the capacity to model such a system accurately. However, we have
been unsuccessful thus far in its modelling and simulation. Through trial and
error we were able to model a single diagram in the "water sided
HVAC" window which shows multiple coils (radiators) that are linked to the
DHW Plant and DHW Res Loop but were unable simulate the building performance
due to some error. I would expect to see a diagram that consists of a single
boiler (DHW Plant) with a closed loop to and from the radiators (Multiple
Coils) and an open loop running from the single boiler with an arrow pointing
out to space. Does anyone know a simple way to model this type of basic system?
Please let us know. Thanks.<br>
<br>
Vaughn Slovak<br>
Architectural Designer<br>
Synergy Design<br>
p. 845.255.1733<br>
f. 845.255.1694<o:p></o:p></p>
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