<div dir="ltr">right...although I had deleted all child components for my zone in question, there were interior walls (defined in adjacent zones) that were exchanging heat transfer with my zone. The adjacent zone just happened to be an unconditioned parking garage that was very cold...foolish that I missed it.</div><br><div class="gmail_quote"><div dir="ltr">On Thu, Dec 20, 2018 at 4:00 PM Joe Huang via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>And the cause for the mystery load is ?? Don't just leave us
hanging!</p>
<p>Joe<br>
</p>
<div class="gmail-m_-3904346340559647763moz-cite-prefix">On 12/20/2018 12:47 PM, Chris Hadlock
via Equest-users wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Thanks to all who responded...the problem has now been
solved. My faith in eQuest remains.<br>
</div>
<div><br>
</div>
<div>Chris</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Thu, Dec 20, 2018 at 2:33 PM David Eldridge
via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div class="gmail-m_-3904346340559647763gmail-m_7039130555017084751WordSection1">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">That
last sentence is the issue – the system is providing
some amount of air including return and OA to the
space, without a heating coil, meanwhile the
thermostat may be expecting 70F all of the time.</span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">The
issue could be resolved by “upgrading” the unit to
heat, removing/reducing the OA quantity, or by
relaxing or removing the thermostat schedules
depending on what your goals are for the project.</span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">David</span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"> </span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"> </span></p>
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">David
S. Eldridge, Jr.</span></b><b><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(36,64,97)">,
P</span></b><b><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">.</span></b><b><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(36,64,97)">E</span></b><b><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">.</span></b><b><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(36,64,97)">,
LEED AP BD+C, BEMP, BEAP, HBDP</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif"></span></p>
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<p class="MsoNormal"><span style="font-size:4pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><span style="font-size:11pt;font-family:Calibri,sans-serif"></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(54,95,145)">Direct:
(847) 316-92</span><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">24</span><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(54,95,145)">
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<p class="MsoNormal"><span style="font-size:10pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><span style="font-size:11pt;font-family:Calibri,sans-serif"></span></p>
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820 Davis Street, Suite 300 | Evanston, IL 60201</span><span style="font-size:11pt;font-family:Calibri,sans-serif"></span></p>
<p class="MsoNormal"><span style="font-size:9pt;font-family:Calibri,sans-serif;color:gray">Energy
Efficiency Consultants and Sustainable Design
Engineers</span><span style="font-size:11pt;font-family:Calibri,sans-serif"></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"> </span></p>
<p class="MsoNormal"><u><span style="font-size:9pt;font-family:Calibri,sans-serif;color:gray"><a href="http://grummanbutkus.com/" target="_blank"><span style="color:gray">grummanbutkus.com</span></a></span></u><span style="font-size:9pt;font-family:Calibri,sans-serif;color:gray"> | <u><a href="http://grummanbutkus.com/blog" target="_blank"><span style="color:gray">Blog</span></a></u> |
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<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span></p>
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif">
Equest-users [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Chris Hadlock via Equest-users<br>
<b>Sent:</b> Thursday, December 20, 2018 1:05 PM<br>
<b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Equest-users] mystery heating
load</span></p>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">I've had a few responses
requesting the modeling files so I've attached the
INP and PD2 file (weather file is CWEC\Toronto.bin).
The zone in question is "L0 Elev Lobby S" and I've
already removed all exterior surfaces from this
space (i.e. there are no Child Components). I've
assigned this zone to it's own system (it's the last
system on the air-side tab) called "Test System".
I've already created the hourly reports where you'll
see all of the underheated hours (which only occur
in the winter). The LS-B report shows no (zero) htg
load. I realize the system is not really providing
any heating to this zone the way it's setup.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Thanks,</p>
</div>
<div>
<p class="MsoNormal">Chris</p>
</div>
</div>
<p class="MsoNormal"> </p>
<div>
<div>
<p class="MsoNormal">On Thu, Dec 20, 2018 at 1:26 PM
Chris Hadlock <<a href="mailto:cjhadlock@gmail.com" target="_blank">cjhadlock@gmail.com</a>>
wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<p class="MsoNormal">Hello,</p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I've created a model
using eQuest 3.65 (DOE 2.2) build 7173 that
is of a 20 storey multi-residential building
located in Toronto, Ontario (Canada). There
is a basement with a elevator lobby that is
an interior space (no exterior walls). </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">My model keeps telling me
I have underheated hours for this lobby. I'm
trying to figure out why there is a heating
load and I'm stumped. I have removed what I
believe to be all potential sources of heat
loss. I've deleted the underground floor
(which was R-100 anyway), I've deleted the
interior walls (just to be thorough), there
is no infiltration, and I've set the
ventilation to zero. In my mind, there is no
source of heat loss. I've even added a
significant (10 W/ft2) equipment load and
yet there are still underheated hours (I've
even reduced my Tstat setpoint to 60F). </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I've run an hourly report
to help figure out the loads for both the
space ("Sum of all weighted loads except
infil and latent") and zone ("Load Calc'd
SPACE Sensible load at const temp
(Btu/hr)"). These reports all indicate a
positive load (i.e. net heat gain) from my
lights, plug loads and occupants. However
through this process I'm also questioning
these reports as the lighting, people and
equipment load being reported don't exactly
align with my modeled schedules for these
loads....but I've put a pin in that.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Regardless, I have no
idea how to figure out what may be resulting
in net heat loss for this zone. To be
thorough, I checked the elevator lobby on
the ground level and the same thing is
happening. Has anybody seen this
before...any ideas what might be causing
heat loss for a zone with no ventilation and
no walls and no infiltration? It does seem
to be seasonal (i.e no underheated hours in
the summer) so it has some connection to
weather file but does not correlate exactly.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">If you do take the time
to read this, a big thank you. If you
provide the answer, you'll for sure be on
Santa's "nice" list.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Chris </p>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
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