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<p class="MsoNormal">Dear Trnsys users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I am currently working on a very massive building, with many zones and very with high thermal inertia (concrete wall from 60 to 120 cm of thickness). The model takes 40 minutes to calculate 1 month.
<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">I observe than after one month, final temperatures in zones are still very depending on initial temperatures. For this reason, I tried to adjust initial temperature to be nearer to expected final temperatures (in the
order of 35-40°C). <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">However, in the first part of the simulation, temperatures drop quickly to 25-30°C, depending on the zone. This is quite surprising, considering that there are no heat losses and there are heat gains. The only explication
I found is that surface temperatures are not initialized to initial temperature of the zone, and thermal mass takes time to warm up.<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">Do you know if there is a way to force surface temperatures to zone temperatures at the beginning of a simulation ?<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">Thank you ! <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">Best regards, <o:p>
</o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-family:"Tahoma","sans-serif";color:#58595B">Marcello Caciolo</span></b><span style="font-family:"Tahoma","sans-serif";color:#58595B"><br>
</span><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#58595B">Responsable Outils et Méthodes d'Analyse Energétique</span><span style="font-family:"Tahoma","sans-serif";color:#58595B"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray"><img width="170" height="62" id="Image_x0020_1" src="cid:image001.jpg@01D0FF78.1BEED620" alt="cid:image003.jpg@01CD4E08.954D04D0"><br>
<b><br>
</b>Service Engagement Energétique - Direction Ingénierie Conception<br>
15 rue Nina Simone<br>
CS 39601 - 44096 Nantes Cedex 1</span><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif""><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray">Tél.: +33 02 40 41 06 57</span><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif""><br>
<a href="mailto:prenom.nom@aximaseitha-gdfsuez.com">marcello.caciolo@cofelyaxima-gdfsuez.com</a><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:Webdings;color:#339966">P</span><span style="font-size:10.0pt;font-family:Webdings;color:#339966">
</span><b><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#339966">Pensez à l'environnement avant d'imprimer ce message</span></b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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