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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Dear Lukasz,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">As the error says, is your building geometry not closed or not convex (Manual 5-Multizone, 5.2.7.12. Zone Radiation Modes). This problem can’t be caused by your virtual surfaces.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Please make sure that your building is convex and closed!<o:p></o:p></span></p>
<p class="MsoNormal"><img width="390" height="216" style="width:4.0625in;height:2.25in" id="Grafik_x0020_1" src="cid:image001.jpg@01D411F1.1F846D70"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Christoph<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>Von:</b> TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org]
<b>Im Auftrag von </b>Lukasz Watly via TRNSYS-users<br>
<b>Gesendet:</b> Freitag, 29. <span lang="EN-US">Juni 2018 09:42<br>
<b>An:</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Cc:</b> Łukasz Wątły <lukaszwatly92@gmail.com><br>
<b>Betreff:</b> [TRNSYS-users] Detailed radiation model<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Dear All,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I have desgined in SketchUP a single thermal zone with 3 airnodes placed on different heights (<i>10</i>,
<i>60</i>, <i>110</i> cm). I used a <i>Virtual Surface</i> option to model the surfaces which, after exporting them to TRNBuild, could dissapear.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">In my simulation of the zone, I would like to obtain three values of Tairnode, Toperative and mean radiant temperature for each airnode. Unfortunately, when I perform simulation in TRNSYS, all three values of mean radiant
temperatures are the same. This I did with the radiation model set to <i>standard</i>.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">When I am trying to use the <i>detailed</i> radiation model, I got two error informations:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">-</span></b><span lang="EN-US"> ==== zone GROUND_FLOOR_10... ... ERROR in summing view factors of surface 4. Please check geometry!!!.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">-</span></b><span lang="EN-US"> Error while creating VFM file.<br>
+++ Note: Zones have to be convex and closed volumes.<br>
Surfaces must have an outwarding normal.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">This causes the situation that I am unable to open the .vfm file in TRNSYS and cannot get the mean radiant temperature values.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I assume that the problem is caused by the fact that my model might not be a closed volume, due to the virtual surfaces I have created in SketchUP. So my question is, is there another way to get the MRT values for each
airnodes separetely? <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">The view factor of <i>surface 4</i> is set to 0.5 automatically, as it is one of the vertical walls.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Thank you in advance for your help.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">Kind regards,<o:p></o:p></p>
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<p class="MsoNormal">Lukasz Watly<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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