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<p>Christina,</p>
<p> Thanks for responding to this with such a comprehensive
explanation! <br>
</p>
<p>David</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 03/17/2021 04:20, hotline via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:AM0PR01MB5588D6865F8BACCA2A2508BAD16A9@AM0PR01MB5588.eurprd01.prod.exchangelabs.com">
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font-size:12pt; color:rgb(0,0,0)">
Hi Toni, </div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
you said you are using an internal shading factor for the
adjacent window, right? In contrast to external shading, which
just uses a simple factor to determine the shading (ESHADE = 1
-> Transmission = 0), internal shading is modelling much
more detailed effects, see image below:</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
<img size="70068" contenttype="image/png" unselectable="on"
tabindex="-1" style="max-width: 100%; user-select: none;
width: 588px; height: 545px;" data-outlook-trace="F:1|T:1"
src="cid:part1.882E1850.EA2D865B@tess-inc.com" class=""
width="588" height="545"><br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;
font-size:12pt; color:rgb(0,0,0)">
<span style="color: rgb(0, 0, 0); font-family: Calibri, Arial,
Helvetica, sans-serif; font-size: 12pt;">Of all the radiation
coming in through the window, a part is absorbed by the
shading device and then released to the airnode through
convection, some is reflected towards the window, again there
we have absorption, convection and reflection back towards the
zone and so on. Therefore, an internal shading device can
never prevent all solar gains from entering a zone. Please see
<i>5.2.4.6. Definition of a New Window Type </i>and <i>5.4.2.9.
External and Internal Shading Devices
</i>of the Multizone Building part in the TRNSYS Documentation
for more info on this.</span><br>
</div>
<br>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
Best regards, </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);">
Christina</div>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>Von:</b>
TRNSYS-users
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users-bounces@lists.onebuilding.org"><trnsys-users-bounces@lists.onebuilding.org></a> im Auftrag
von Toni Calabrese via TRNSYS-users
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>Gesendet:</b> Dienstag, 16. März 2021 18:00<br>
<b>An:</b> TRNSYS users mailing list at OneBuilding.org
<a class="moz-txt-link-rfc2396E" href="mailto:trnsys-users@lists.onebuilding.org"><trnsys-users@lists.onebuilding.org></a><br>
<b>Cc:</b> Toni Calabrese <a class="moz-txt-link-rfc2396E" href="mailto:toni.calabrese@ost.ch"><toni.calabrese@ost.ch></a><br>
<b>Betreff:</b> [TRNSYS-users] Problem with adjacent window</font>
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<span style="font-size:10.0pt; color:#1F497D"> </span></p>
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<span style="font-size:10.0pt; color:#1F497D"> </span></p>
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<span style="font-size:10.0pt" lang="EN-US">Hi,</span><span
style="font-size:10.0pt; color:#1F497D"></span></p>
</div>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom:
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<span style="font-size:10.0pt" lang="EN-US">I am working in
Trnsys18. I have a building model with two thermal zones
(Wintergarten and one room) with an external window for
the wintergarten and an adjacent window between the two
zones. If I set the external shading factor of the
external window to 1, I have no solar gains in the two
zones, as it should be -> CORRECT!</span></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom:
0px;margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family:
Arial, sans-serif;">
<span style="font-size:10.0pt" lang="EN-US"> </span></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom:
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Arial, sans-serif;">
<span style="font-size:10.0pt" lang="EN-US">I tried then to
shade just the adjacent window between the two zones (int.
shading factor of 1 in TRNBUILD) and I expected solar
gains just in the wintergarten, but not in the room. I got
solar gains in both zones. It seems that I am not able to
shade completely just the adjacent window.</span></p>
<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom:
0px;margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family:
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<span style="font-size:10.0pt" lang="EN-US"> </span></p>
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<span style="font-size:10.0pt" lang="EN-US">Which is the
problem?</span></p>
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<b><span style="font-size:10.0pt; color:#1F497D">Toni
Calabrese</span></b><span style="font-size:10.0pt;
color:#1F497D">, MSc.</span></p>
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<span style="font-size:10.0pt; color:#1F497D">Wissenschaftlicher
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<span style="font-size:10.0pt; color:#1F497D">SPF Institut
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<span style="font-size:10.0pt; color:#1F497D">Oberseestr. 10
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width="75" hspace="12" height="70" align="left"><b><span
style="font-size:10.0pt; color:#8C195F">Kursmodul
Energiespeicher (4 Tage) an der OST – Rapperswil:</span></b></p>
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<span style="font-size:10.0pt; color:#004B7A">Alles was Sie
zu thermischen, elektrischen, chemischen und mechanischen
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems 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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