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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>Dear TRNSYS users,<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='color:#1F497D'>I post again this message, hoping that someone can give a quick look to our sample project and give us some ideas on the reasons we don’t have the results we expected : <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>We have a little problem with type 56. I send you enclosed a sample project illustrating our problem.<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>In type 56, we have one zone with 4 external glazed surfaces, with 4 orientations (namely ENE, <span style='color:#9BBB59'>124 m2</span>, SSE, <span style='color:#C0504D'>48m2</span>, OSO, <span style='color:#4BACC6'>124 m2</span> and Horizontal, <span style='color:#8064A2'>198 m2</span>), and a boundary surface, with identical temperature.<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>There are no internal loads. External radiation is fixed to <span style='color:#9BBB59'>1000 kJ/hm2</span> on ENE, <span style='color:#C0504D'>2000 kJ/hm2</span> on SSE, <span style='color:#4BACC6'>600 kJ/hm2</span> on OSO and <span style='color:#8064A2'>800 kJ/hm2</span> on horizontal, and assumed totally direct (ITotal = IBeam), with a zero incident angle for each orientation (this is no realistic, but we wanted to avoid problems with angle-dependant transmission coefficient).<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>A cooling type is added to the building, in order to maintain ambient temperature to 26°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>All the windows have a <b>SHGC</b> of <b>0.387</b>, for 0° incident radiation, calculated by LBNL Window, and a ratio of frame of 10 %.<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>We expected cooling load, for static conditions, to be in the order of the result of following equation :<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:8.5pt;font-family:"MS Sans Serif"'>(<span style='color:#1F497D'> </span><span style='color:#9BBB59'>IT_ENE*124</span><span style='color:#1F497D'> </span>+<span style='color:#1F497D'> </span><span style='color:#C0504D'>IT_SSE*48</span><span style='color:#1F497D'> </span>+<span style='color:#1F497D'> </span><span style='color:#4BACC6'>IT_OSO*124</span><span style='color:#1F497D'> </span>+<span style='color:#1F497D'> </span><span style='color:#8064A2'>RadTotHor*198</span><span style='color:#1F497D'> </span>)*<span style='color:#1F497D'> </span><b>0.387<span style='color:#1F497D'> </span></b>*<span style='color:#1F497D'> </span>0.9<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:8.5pt;font-family:"MS Sans Serif";color:blue'>! 124 = WinSurf ENE, 48 = WinSurf SSE, 124 = WinSurf OSO, 198 = WinSurf Hor<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:8.5pt;font-family:"MS Sans Serif";color:blue'>! 0.387 = Win SHGC<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.5pt;font-family:"MS Sans Serif";color:blue'>! 0.9 = 1-ratioFrame</span><span lang=EN-US><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>(TotalRad equation)<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, TRNSYS give us almost half of this load (P froid in this picture, VS AppSolaires calculated by TotalRad equation).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><img width=798 height=409 id="_x0000_i1025" src="cid:image002.jpg@01CF97AA.BF095C90"><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Do you have any idea of the reason our hand calculation is so far from TRNSYS calculation?<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 for your help !<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@01CF97A8.2250E320" alt="cid:image003.jpg@01CD4E08.954D04D0"><br><b><br></b>Cellule Efficacité Energétique et Environnementale - Pôle Projets et Réalisations<br>46 Boulevard de la Prairie au Duc<br>BP 40119 - 44201 Nantes Cedex 02</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></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'><o:p></o:p></span></p><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></body></html>