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<p class="MsoNormal">Dear Karol and Katarzyna,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">If boundary conditions = IDENTICAL, the surface temperatures of the active wall Tsi and Tso will only be identical, if:<o:p></o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3"><span lang="EN-US">Wall construction is symmetrical<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo3"><span lang="EN-US">Convective heat transfer coefficients (front and back) are the same<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best<br>
Christoph Stetter<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><i><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">__________________________________________________________________________________________________<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Christoph Stetter M.Eng.<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Transsolar Energietechnik GmbH<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Curiestraße 2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">70563 Stuttgart<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="mso-fareast-language:DE"><a href="http://www.transsolar.com/"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-GB">http://www.transsolar.com</span></a></span><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:green;mso-fareast-language:EN-GB">Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und
Nutzerkomfort in Gebäuden<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:green;mso-fareast-language:EN-GB">Stuttgart – München – New York – Paris
<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter
Schnelle<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Eingetragen beim Amtsgericht Stuttgart HRB 23347,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">Steuernummer: 99073/00911,USt-IdNr.: DE 152272639</span><span style="mso-fareast-language:DE"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="mso-fareast-language:DE">Von:</span></b><span style="mso-fareast-language:DE"> TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org]
<b>Im Auftrag von </b>Karol Bandurski via TRNSYS-users<br>
<b>Gesendet:</b> Montag, 22. Januar 2018 12:44<br>
<b>An:</b> trnsys-users@cae.wisc.edu<br>
<b>Cc:</b> Karol Bandurski <karol.bandurski@put.poznan.pl><br>
<b>Betreff:</b> [TRNSYS-users] Active layer/boundary condition - strange results<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="PL">Dear Users and Developers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We would like to model active layer as component of TABS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Now our model is one zone with active layer in ceiling. Adiabatic condition/IDENTICAL for all internal partition and set. We have one external wall.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2"><span lang="EN-US">We would like to keep neighborhood zones in the same AIR temperature. But when we set boundary condition to IDENTICAL over TABS, then outer surface of this partition
has higher temperature then indoor air temperature and active layer water temperature… -Why?<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="2" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2"><span lang="EN-US">The situation is better if we set convective heat transfer coefficient, on outer surface of TABS to 0.001. If we understand, it is mean direct contact between air
and surface. So if there are adiabatic/identical condition: outer SURFACE temperature of TABS has the same temperature as AIR inside modelled zone. But our aim is to keep identical inside and outside AIR temperature, not SURFACE temperature… How we can do
it?<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kind regards,<br>
Karol<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:PL">--------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:PL">Karol BANDURSKI M. Sc.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:PL">Faculty of Civil and Environemntal Engeneering<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:PL">Division of Heating, Air Conditioning and Air Protection<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:PL">Poznan University of Technology<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="https://www.researchgate.net/profile/Karol_Bandurski">https://www.researchgate.net/profile/Karol_Bandurski</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL" style="color:#1F497D;mso-fareast-language:PL"><a href="http://www.put.poznan.pl/~karol.bandurski"><span lang="EN-US">www.put.poznan.pl/~karol.bandurski</span></a></span><span lang="EN-US" style="color:#1F497D;mso-fareast-language:PL"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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