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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-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Eva,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>We use to model radiators indirectly, by imposing in type 56 a heating type, with a radiative part of 0.3 and a set point temperature corresponding to the radiator set point temperature + 1°C, in order to take into account the regulation of the radiator (thermostatic valve). It is a very rough approach, but we find it sufficient for most applications and enough easy to implement.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>A more rigorous approach would be to characterize the radiator by a law of the type: Q = kDT^n, with k and n characteristic of the radiator, and to associate a PI controller with no integral (proportional controller). The problem of this approach is that it is necessary to know the proportional constant of the thermostatic valve and to use little time steps. In addition, this approach does not consider the delay of action of the thermostatic valve, which can be important, and its hysteresis. More complex approaches can be imagined to take into account these factors, but you should to know exactly all the characteristics of your thermostatic valve.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For this reason, we usually use the simplified approach I proposed.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:11.0pt;font-family:"Tahoma","sans-serif";color:#58595B'>Marcello Caciolo</span></b><span style='font-size:11.0pt;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-size:11.0pt;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@01CD55FB.78B7DC00" 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";color:#1F497D'><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";color:#1F497D'><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-size:11.0pt;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><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] <b>De la part de</b> Eva gklezakou<br><b>Envoyé :</b> vendredi 29 juin 2012 13:12<br><b>À :</b> trnsys-users<br><b>Objet :</b> [TRNSYS-users] conventional heating radiators TNSYS 16<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Dear Sirs,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I am informed that there is not a free component which can be used in order to model <span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white'>conventional heating radiators (warm water based not electric). Does anyone has any component which can model this case. Does anyone know any other approach in order to model this type of heating system?</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white'>Thank you.</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white'>Regards,</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222;background:white'>Ev</span><o:p></o:p></p></div></div><p></p>
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