<div dir="ltr"><div>Dear Christoph,</div><div><br></div><div>Thank you very much for your reply. Finally, I have checked the surfaces and I can perform the simulations without any error.</div><div><br></div><div>However, I would also like to ask how I could obtain the mean radiant temperature of the 3 airnodes in the model I described in the previous email. In the manual (chapter 5.2.4.12 Radiation Modes) it is written that the longwave radiation distribution is available only for thermal zones, not airnodes - this might justify the reason why I got the same values for different airnodes.<br></div><div><br></div><div>Thus, do you know if there is the way to overcome this problem?</div><div><br></div><div>I would be grateful for any hints.</div><div><br></div><div>Kind regards,</div><div>Lukasz<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2018-07-02 10:40 GMT+02:00 hotline via TRNSYS-users <span dir="ltr"><<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.onebuilding.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-US">Dear Lukasz,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="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.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Please make sure that your building is convex and closed!<u></u><u></u></span></p>
<p class="MsoNormal"><img style="width:4.0625in;height:2.25in" id="m_-8136591680129287336Grafik_x0020_1" src="cid:image001.jpg@01D411F1.1F846D70" width="390" height="216"><span lang="EN-US"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Best,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Christoph<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><b>Von:</b> TRNSYS-users [mailto:<a href="mailto:trnsys-users-bounces@lists.onebuilding.org" target="_blank">trnsys-users-bounces@<wbr>lists.onebuilding.org</a>]
<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 <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.<wbr>onebuilding.org</a>><br>
<b>Cc:</b> Łukasz Wątły <<a href="mailto:lukaszwatly92@gmail.com" target="_blank">lukaszwatly92@gmail.com</a>><br>
<b>Betreff:</b> [TRNSYS-users] Detailed radiation model<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">Dear All,<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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.
<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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>.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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:<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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!!!.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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? <u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></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.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US">Thank you in advance for your help.<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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<p class="MsoNormal">Kind regards,<u></u><u></u></p>
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<p class="MsoNormal">Lukasz Watly<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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