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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Hi all<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>I have a project where I need to model a maintenance hangar,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>In this project we are evaluating the relevance of insulate the roof to improve the comfort level in summer. The hangar has no air conditioned system but we use natural ventilation which seems to work well in our model (we use IES VE).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>The problem came when we try to put some insulating material to the actual roof (which is composed of only metal sheet of 2 cms). Unlike one might expect the temperature in the hangar increases, as the roof temperature.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>This is to some extent logic, and I know it depends of the insulate type and thickness. But we agree (I think) that at least one insulation with les of 2cm to the actual roof should give an improvement in at least roof or air temperature. I know that insulation can serve as a “trap” of interior thermal conditions, so it’s improve HVAC systems performance. But also it serves to avoid the external conditions gets-in.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>I have tried several configurations without success, internal, external insulation. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>And maybe some of you have already some experience in model this kind of configuration. We agree (I think) that I can’t recommend to my architect that he shouldn’t insulate its roof, but also I want to explain the pertinence of this with a dynamic thermal modeling.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Thanks in advance for any advice on this,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>David Garcia<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 style='border-collapse:collapse'><tr style='height:39.55pt'><td width=106 style='width:79.8pt;padding:0in 5.4pt 0in 5.4pt;height:39.55pt'><p class=MsoNormal><b><span style='mso-fareast-language:FR'><img width=91 height=93 id="Image_x0020_3" src="cid:image001.png@01CE3CF1.98DC1C70" alt="cid:image001.png@01CD52C2.E1AE1DF0"></span></b><b><span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></b></p></td><td width=394 style='width:295.85pt;padding:0in 5.4pt 0in 5.4pt;height:39.55pt'><p class=MsoNormal style='line-height:110%;text-autospace:none'><span style='font-family:"Arial","sans-serif";color:black;mso-fareast-language:FR'>David GARCIA-SANCHEZ</span><span style='font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal style='line-height:110%;text-autospace:none'><b><span style='font-size:13.0pt;line-height:110%;font-family:"Arial","sans-serif";color:#8CC63E;letter-spacing:-.4pt;mso-fareast-language:FR'>green</span></b><b><span style='font-size:13.0pt;line-height:110%;font-family:"Arial","sans-serif";color:black;letter-spacing:-.4pt;mso-fareast-language:FR'>affair</span></b><b><span style='font-size:13.0pt;line-height:110%;font-family:"Arial","sans-serif";color:gray;letter-spacing:-.4pt;mso-fareast-language:FR'><o:p></o:p></span></b></p><p class=MsoNormal style='line-height:110%;text-autospace:none'><span style='font-size:8.0pt;line-height:110%;font-family:"Arial","sans-serif";color:#404040;mso-fareast-language:FR'>Tel. +33 (0)1 46 03 08 02<o:p></o:p></span></p><p class=MsoNormal style='line-height:110%;text-autospace:none'><span style='font-size:8.0pt;line-height:110%;font-family:"Arial","sans-serif";color:#404040;mso-fareast-language:FR'>Mobile +33 (0)6 78 15 08 09<o:p></o:p></span></p><p class=MsoNormal style='line-height:110%;text-autospace:none'><span style='font-size:8.0pt;line-height:110%;font-family:"Arial","sans-serif";color:#404040;mso-fareast-language:FR'>102 avenue Edouard Vaillant – 92100 Boulogne-Billancourt<o:p></o:p></span></p><p class=MsoNormal style='line-height:110%;text-autospace:none'><b><span style='font-size:8.0pt;line-height:110%;font-family:"Arial","sans-serif";color:#8CC63E;mso-fareast-language:FR'><a href="http://www.greenaffair.com/"><span style='color:#8CC63E'>www.greenaffair.com</span></a></span></b><b><span style='color:#92D050;mso-fareast-language:FR'> </span></b><b><span style='font-family:"Arial","sans-serif";color:#92D050'><o:p></o:p></span></b></p></td></tr></table><p class=MsoNormal><span style='mso-fareast-language:FR'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>