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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Muhammad and Tim,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">in fact it is a little different:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Boundary identical
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">the back surface receives the same gains as the front side surface<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">the starnode temperature of the back side is the starnode temperature of the front side<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">the used heat transfer coefficient<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If the construction is symmetrical and the heat transfer coefficients (htc) are the same then
<br>
the back surface temperature = front surface temperature.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If the construction isn’t symmetrical and/or different htc are defined the temperatures are different.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Boundary userdefined<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The user defines a temperature which is coupled to the back surface temperature by the<br>
defined htc to the back surface temperature. <o:p></o:p></span></p>
<p class="MsoListParagraph"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> If you want to set a defined back surface temperature there is an option to define “direct contact”
<br>
by setting htc = 0.0001. I know that it is strange to defined a very low HTC for obtaining perfect coupling,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> But that’s the way it is defined in the code.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Marion<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#005A00">-----------------------------------------------------------------------------------------------------------------------------------------------------------</span></b><span lang="DE-CH" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#005A00">Dipl.-Ing. Marion Hiller </span></b><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#009900"><br>
</span></b><b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#007000">TRANSSOLAR Energietechnik GmbH </span></b><span lang="DE-CH" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><br>
</span><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#005A00">Stuttgart - Munich - New York - Paris
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#007000"> <o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#007000">t:
<a href="tel:%2B49.711.67976.27" target="_blank"><span style="color:#007000">+49.711.67976.0</span></a> f:
<a href="tel:%2B49.711.67976.11" target="_blank"><span style="color:#007000">+49.711.67976.11</span></a></span></b><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#007000"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#0070C0"><a href="http://www.transsolar.com/" target="_blank"><span style="color:#0070C0">www.transsolar.com/</span></a></span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#005A00"> <br>
<br>
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D">KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden </span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#005A00"><br>
</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D">Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart
<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D">Amtsgericht Stuttgart - HRB 23347</span></b><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D"> / Steuernummer: 99073/00911
/ USt-IdNr.: DE 152272639</span></b><b><span lang="DE-CH" style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D"><br>
Geschäftsführer: Matthias Schuler, Thomas Auer, Stefan Holst, Dieter Schnelle </span></b><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org]
<b>Im Auftrag von </b>mcdowell@tess-inc.com<br>
<b>Gesendet:</b> Donnerstag, 2. Juli 2015 22:59<br>
<b>An:</b> TRNSYS users mailing list at OneBuilding.org<br>
<b>Betreff:</b> Re: [TRNSYS-users] Determining TrnBuild Boundary temperatures in boundary type.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p>Muhammad Talha -<o:p></o:p></p>
<p>Identical means that the back surface temperature is the same as the front surface temperature.<o:p></o:p></p>
<p>Userdefined means that the back surface temperature will be set by the user, either as a constant or as an input.<o:p></o:p></p>
<p>Regards,<o:p></o:p></p>
<p>Tim<o:p></o:p></p>
<p> <o:p></o:p></p>
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<pre>---<br>Timothy P. McDowell<o:p></o:p></pre>
<pre>Executive Vice President<o:p></o:p></pre>
<pre>Thermal Energy System Specialists, LLC<o:p></o:p></pre>
<pre>22 N Carroll St, Suite 370<o:p></o:p></pre>
<pre>Madison, WI 53703<o:p></o:p></pre>
<pre>608-274-2577<o:p></o:p></pre>
</div>
<p>On 2015-07-02 15:30, Muhammad Talha wrote:<o:p></o:p></p>
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<p class="MsoNormal">Dear TRNSYS users, <o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
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<div>
<p class="MsoNormal">Is there a way to determine the boundary temperature in the boundary type in TrnBuild. I am using the boundary as category for floor but can't comprehend what identical means. I want to determine heat loss through the floor of my building.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Mohammad Talha<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>TRNSYS-users mailing list<o:p></o:p></pre>
<pre><a href="mailto:TRNSYS-users@lists.onebuilding.org">TRNSYS-users@lists.onebuilding.org</a><o:p></o:p></pre>
<pre><a href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a><o:p></o:p></pre>
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