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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Sorry,
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79">1/U-wert=(1/7.7)+(1/25)+(1/thermal conductance)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Dr. Hassan Mahach</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">wissenschaftlicher Mitarbeiter<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Arbeitsfeld Technische Innovationen<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">+49 681 844 972 23<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">mahach@izes.de<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">www.izes.de<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">IZES gGmbH | Altenkesseler Straße 17, Geb. A1 | 66115 Saarbrücken<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Büro Berlin | Albrechtstraße 22 | 10117 Berlin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Telefon: +49 681 844 972 0 | Fax: +49 681 761 799 9<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Rechtsform: gGmbH | Registergericht Saarbrücken HRB 8499<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Steuernummer: 040 140 241 53 | USt.-IdNr.: DE 138 113 796<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Aufsichtsratsvorsitz: Minister Jürgen Barke<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Geschäftsführung: Prof. Frank Baur | Dr. Lesya Matiyuk<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><img width="394" height="74" id="_x0000_i1027" src="cid:image003.jpg@01D8908A.468CD170"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Mahach, Hassan
<br>
<b>Gesendet:</b> Dienstag, 5. Juli 2022 16:13<br>
<b>An:</b> 'Loic Tachon' <dr.loic.tachon@gmail.com><br>
<b>Cc:</b> TRNSYS users mailing list at OneBuilding.org <trnsys-users@lists.onebuilding.org><br>
<b>Betreff:</b> AW: [TRNSYS-users] TRNSYS ground floor<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79;mso-fareast-language:EN-US">Hi Loïc,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79;mso-fareast-language:EN-US">If you look to your inf file you find :<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">THERMAL CONDUCTANCE, U= 37.80000 kJ/h m2K; U-Wert= 3.77020 W/m2K<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">(incl. alpha_i=7.7 W/m^2 K and alpha_o=25 W/m^2 K)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79">I think that’s means in this case that the thermal conductance refers only to your wall and U-wert, in addition to thermal conductance, includes the inside
and outside heat transfer coefficients:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79">1/U-wert=(1/7.7)+(25)+(1/thermal conductance)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79">Kind regards
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79"> Hassan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Dr. Hassan Mahach</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">wissenschaftlicher Mitarbeiter<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Arbeitsfeld Technische Innovationen<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">+49 681 844 972 23<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="mailto:mahach@izes.de">mahach@izes.de</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="http://www.izes.de">www.izes.de</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">IZES gGmbH | Altenkesseler Straße 17, Geb. A1 | 66115 Saarbrücken<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Büro Berlin | Albrechtstraße 22 | 10117 Berlin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Telefon: +49 681 844 972 0 | Fax: +49 681 761 799 9<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Rechtsform: gGmbH | Registergericht Saarbrücken HRB 8499<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Steuernummer: 040 140 241 53 | USt.-IdNr.: DE 138 113 796<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Aufsichtsratsvorsitz: Minister Jürgen Barke<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Geschäftsführung: Prof. Frank Baur | Dr. Lesya Matiyuk<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><img border="0" width="394" height="74" id="Grafik_x0020_1" src="cid:image002.jpg@01D8908A.46897610"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Loic Tachon [<a href="mailto:dr.loic.tachon@gmail.com">mailto:dr.loic.tachon@gmail.com</a>]
<br>
<b>Gesendet:</b> Dienstag, 5. Juli 2022 15:09<br>
<b>An:</b> Mahach, Hassan <<a href="mailto:mahach@izes.de">mahach@izes.de</a>><br>
<b>Cc:</b> TRNSYS users mailing list at OneBuilding.org <<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>><br>
<b>Betreff:</b> Re: [TRNSYS-users] TRNSYS ground floor<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Hassan,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks for your reply. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">What is the difference between THERMAL CONDUCTANCE, U= 37.80000 kJ/h m2K; U-Wert= 3.77020 W/m2K ? (we find theses wall value in the inf file) This is not just unit conversion because 37.8 / 3.6 is different that 3.77.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks for the help.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best regards,<o:p></o:p></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Le mar. 5 juil. 2022 à 10:36, Mahach, Hassan <<a href="mailto:mahach@izes.de">mahach@izes.de</a>> a écrit :<o:p></o:p></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D">Hi Dr. Tachon,
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D">The U-Wert means how your wall transfer the heat and it’s normal that you get this change because
you changed the thickness of your materials as well as his type (U-wert= Thermal conductivity/thickness). You may also consider your ground-on-slab as boundary wall by setting to the inside (front) and outside (back) convective heat transfer coefficients.
You can refer to volume, page 143 of the documentation</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif">“</span></i><i><span lang="EN-US" style="font-size:11.0pt">WALLS WITH KNOWN BOUNDARY CONDITION</span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span lang="EN-US" style="font-size:11.0pt">A wall having a known boundary condition might be a concrete floor resting on ground of a known temperature or a wall adjacent to
a zone whose temperature is known. The front of the wall is considered to be at the inside of the zone. Normally, the boundary condition is the temperature of a node connected to the back surface of the wall through a pure resistance. It is possible to specify
the surface temperature of the outside by setting the back side heat transfer coefficient of the WALL Type (HBACK) to a very small value (<b>less than 0.001 kJ/h/m²).</b> This WALL Type is then only appropriate for use as a wall with a known boundary. The
use of a very small value may be confusing but was kept for backwards compatibility reasons”</span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span lang="EN-US"> </span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79">I Hope that’s helps
</span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i><span lang="EN-US" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F4E79">Hassan
</span></i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Dr. Hassan Mahach</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">wissenschaftlicher Mitarbeiter</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">Arbeitsfeld Technische Innovationen</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">+49 681 844 972 23</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="mailto:mahach@izes.de" target="_blank">mahach@izes.de</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="http://www.izes.de" target="_blank">www.izes.de</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">IZES gGmbH | Altenkesseler Straße 17, Geb. A1 | 66115 Saarbrücken</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Büro Berlin | Albrechtstraße 22 | 10117 Berlin</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Telefon: +49 681 844 972 0 | Fax: +49 681 761 799 9</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Rechtsform: gGmbH | Registergericht Saarbrücken HRB 8499</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Steuernummer: 040 140 241 53 | USt.-IdNr.: DE 138 113 796</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Aufsichtsratsvorsitz: Minister Jürgen Barke</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black">Geschäftsführung: Prof. Frank Baur | Dr. Lesya Matiyuk</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Calibri",sans-serif;color:black"><img border="0" width="394" height="74" id="gmail-m_5913672376163770652Grafik_x0020_1" src="cid:image002.jpg@01D8908A.46897610" alt="cid:image001.jpg@01D8905B.2921E320"></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> TRNSYS-users [mailto:<a href="mailto:trnsys-users-bounces@lists.onebuilding.org" target="_blank">trnsys-users-bounces@lists.onebuilding.org</a>]
<b>Im Auftrag von </b>Loic Tachon via TRNSYS-users<br>
<b>Gesendet:</b> Dienstag, 5. Juli 2022 09:38<br>
<b>An:</b> TRNSYS users mailing list at OneBuilding.org <<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.onebuilding.org</a>><br>
<b>Cc:</b> Loic Tachon <<a href="mailto:dr.loic.tachon@gmail.com" target="_blank">dr.loic.tachon@gmail.com</a>><br>
<b>Betreff:</b> [TRNSYS-users] TRNSYS ground floor</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dear users,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I want to simulate a huge building (5500 m2) with a 20 cm concrete ground without isolation. <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I don't really understand how the direct contact boundary condition works.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I made a ground wall composed of 20 cm of concret and 80 cm of calcar.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I realize that the simulation result (Tzone temperature) is very dependent of the ground temperature boundary condition. <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I use type 77 with the depth of ground temperature of 1m, the amplitude of 12 and the mean temperature of 12.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If I change the parameters of type 77, the zone temperature results change a lots.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">In the inf file, i get u value result of my floor : THERMAL CONDUCTANCE, U= 4.21086 kJ/h m2K; U-Wert= 0.97567 W/m2K<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If I don't put the 80 cm of calcar, I get the following u value :<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">THERMAL CONDUCTANCE, U= 37.80000 kJ/h m2K; U-Wert= 3.77020 W/m2K<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Is this normal ? What means U-Wert ?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:9.5pt;color:black">Dr. Loïc Tachon </span></b><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.5pt;color:black">(+33) 6 7440-0536 (France)</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:9.5pt;color:black">Dr. Loïc Tachon </span></b><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;color:black">(+33) 6 7440-0536 (France)</span><span style="font-size:9.5pt"><o:p></o:p></span></p>
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