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<p>This might be true in the real world, but not in eQUEST (nor any
other simulation program that I know) because it would require CFD
modeling of the spaces.</p>
<p>Joe <br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 12/20/2018 11:44 AM, Bruce
Easterbrook via Equest-users wrote:<br>
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cite="mid:bd92194b-1d0e-974f-649d-61a8468e63ac@bellnet.ca">
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Hi Chris,<br>
I'm thinking it could be due to infiltration. You have a 22 story
elevator shaft that probably has a machine room on the roof. You
also have stack effect. Any exterior air from the machine room
getting in from this drive is going to be cold and move down to
the bottom of the shaft and pool there. That would be the
basement. It would also affect levels above this explaining your
load in on the first floor. It should decline as you get higher
in the building.<br>
Bruce Easterbrook P.Eng.<br>
Abode Engineering<br>
<br>
<div class="moz-cite-prefix">On 12/20/2018 2:05 PM, Chris Hadlock
via Equest-users wrote:<br>
</div>
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cite="mid:20181220190537.KSWF29026.toroondcmxzimta01-srv.bellnexxia.net@tordcvbicmrk03">
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<div>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.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Chris</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Thu, Dec 20, 2018 at 1:26 PM Chris Hadlock
<<a href="mailto:cjhadlock@gmail.com"
moz-do-not-send="true">cjhadlock@gmail.com</a>> wrote:<br>
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<div dir="ltr">Hello,
<div><br>
</div>
<div>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). </div>
<div><br>
</div>
<div>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). </div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Chris </div>
</div>
</div>
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