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<p>Pu,</p>
<p> I can imagine some configurations of nine airnodes that might
not result in getting same value of SQCOOL as QCOOL when those
nine airnodes are combined into one especially as concerns
radiation exchange between the surfaces. I would suggest you send
your *.tpf and *.b18 to your distributor so that they can check to
see if there is not some assumption difference that is causing the
results that you are seeing. <br>
</p>
<p> It might be worth reading a bit in the Type56/TRNBuild
documentation about GEOSURF. That variable specifies the fraction
of beam radiation entering a zone that falls on each surface of
the zone. I am not very familiar with the details of how the
default value of GEOSURF is determined. It is of course a function
of the building geometry and not something that should be modified
in order to bring the results of one model closer to those of
another. <br>
</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 07/01/2022 21:54, Huijie Pu via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:2072736e.658.181bcd51e33.Coremail.huijiepu@163.com">
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<div
style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial">
<div style="line-height: 1.7;">
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 14px; margin: 0px;">Hello！</div>
<div style="margin: 0px;">
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 14px; margin: 0px;"><br>
</div>
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 14px; margin: 0px;">I divided a large space
into nine areas, i.e. in TRNBuild, one zone with nine
airnodes, but the output NTYPES33-SQCOOL value of the
model is always higher than the output NTYPES31-QCOOL
value of the full large space model, but according to the
actual , the two values should be the same. Both models
have the same settings, neither have any gains set, and
the weather files are the same. I don't understand what is
causing this?</div>
<div style="margin: 0px;">I found that the difference
between these two values is related to the GEOSURF values
of walls and windows, and is most related to the value of
GEOSURF for wall with boundary conditions that the wall is
the floor. The sum of the GEOSURF values of each airnode
is 1. So that the cooling demand value of the two models
is the same, which is need to modify the geosurf value of
each air node?</div>
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 14px; margin: 0px;"><br>
</div>
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 14px; margin: 0px;">kind regards,</div>
<div style="color: rgb(0, 0, 0); font-family: Arial;
font-size: 14px; margin: 0px;">Pu</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</blockquote>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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