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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><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>We should make an unusual (for us) calculation about fire safety. <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>The definition of the problem is quite straightforward: a room has a heavy wall in contact with a space where temperature is rising up to 400 degrees in a hour. We should calculate the airflow rate necessary to limit the temperature rise in the room to 40 degrees during this hour. <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 was wondering if it possible to use TRNSYS to simulate this problem. From my point of view, the main limitation of TRNSYS for this application is that, as my wall is heavy, my minimum wall time step for transfer function is more than 1 hours. If I well understand heat transfer functions, it means that the wall temperature will not change during the hour of my simulation, which is not physically correct for this situation, as wall temperature is expected to rise during the hour due to the large heat flux from the adjacent space.<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 an alternative way in TRNSYS to simulate a wall (finite difference?) which we could use to take into account the wall dynamics, taking into account the fact that simulation of radiative heat exchange is important in this case due to the large temperature difference? If not, have you never done a similar simulation and eventually with which software?<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><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>Marcello CACIOLO</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'><br>Responsable Outils et Méthodes d'Analyse Energétique <br>___________________________________________________ <br><br><img width=176 height=59 id="Image_x0020_1" src="cid:image001.jpg@01CC73A4.08DFD7A0" alt="logo AximaSeitha"><br><b><br></b></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>Cellule Efficacité Energétique</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>Direction Commerciale</span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'> <br></span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'>46 Boulevard de la Prairie au Duc BP 40119<br>44000 Nantes Cédex 2<br>Tel. 02 40 41 06 57</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'><br>mail: <a href="marcello.caciolo@aximaseitha-gdfsuez.com">marcello.caciolo@aximaseitha-gdfsuez.com</a><o:p></o:p></span></p><p class=MsoNormal><u><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:blue'><br></span></u><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'><a href="www.aximaseitha-gdfsuez.com">www.aximaseitha-gdfsuez.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p></div><p class=MsoNormal><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></div><font face="monospace"><br>
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