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<p>Karol,</p>
<p> I think your picture is correct. <br>
</p>
<p> The process for setting it up can be a little confusing. My
understanding of how to set up the second case is to draw both
Zone1 and Zone2 separated by a VirtualSurface in Trnsys3d. I
assume there is some way of doing the same in TRNLizard but I'm
afraid I'm not familiar with that tool. Once you import the *.idf
file into TRNBuild, the virtual surface will disappear. You then
add Zone2 to Zone1 so that they become two airnodes of a single
zone. To do this, you open the zone/airnode that you're going to
move and you click on the button in the upper left corner that
looks like a u-shaped arrow.</p>
<p> Since the virtual surface that separates the two airnode has
disappeared you no longer have an adjacent surface through which
to define the air flow coupling. Instead, you click on the
"coupling" button in the airnode window (upper right) and define
the coupling there.</p>
<p>best,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 04/30/2021 08:01, Karol BANDURSKI
via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:001601d73dc0$deaffe50$9c0ffaf0$@put.poznan.pl">
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<p class="MsoNormal">Dear Expert,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have tackled this topic a few times but I
am still not sure if I understand the idea of Virtual Surface.<o:p></o:p></p>
<p class="MsoNormal">Could you write me if enclosed sketch
properly describe heat exchange in the zone in the context of
Virtual surface?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards,<o:p></o:p></p>
<p class="MsoNormal">Karol<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">--------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Karol
BANDURSKI Ph.D.<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span lang="EN">Faculty
of Environmental and Energy Engineering</span><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Division
of Heating, Air Conditioning and Air Protection<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Poznan
University of Technology<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"
lang="PL"><a
href="http://www.put.poznan.pl/~karol.bandurski"
target="_blank" moz-do-not-send="true"><span
style="color:blue" lang="EN-US">www.put.poznan.pl/~karol.
bandurski</span></a></span><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL"><a
href="https://www.researchgate.net/profile/Karol_Bandurski"
moz-do-not-send="true"><span style="color:blue"
lang="EN-US">https://www.researchgate.net/profile/Karol_Bandurski</span></a></span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
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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>
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