<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
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>
<blockquote type="cite"
cite="mid:20181220190537.KSWF29026.toroondcmxzimta01-srv.bellnexxia.net@tordcvbicmrk03">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<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>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div dir="ltr">
<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>
</div>
</blockquote>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Equest-users mailing list
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a>
To unsubscribe from this mailing list send a blank message to <a class="moz-txt-link-abbreviated" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a>
</pre>
</blockquote>
<br>
</body>
</html>