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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">Pauline,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy">the view factor entered in TRNbuild is used for longwave radiation exchange of external surfaces.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy">As stated the value is used as a weighting factor between ground (Input 4) and sky temperature (Input3).<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy">(See also Page 155 of 05-MultizoneBuilding.pdf)<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy">If you have set both inputs to the same value a changing value of Fsky doesn’t have an impact.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy">For diffuse radiation calculation the slope of the surface is used. In addition, the shading mask includes<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy">a sunlit fraction for isotropic diffuse radiation.
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><st1:place w:st="on"><st1:City w:st="on"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:
Arial;color:navy">Marion</span></font></st1:City></st1:place><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:
Arial;color:navy"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span lang="EN-GB" style="font-size:10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
<div>
<p class="MsoNormal"><b><font size="1" color="green" face="Arial"><span lang="EN-GB" style="font-size:9.0pt;font-family:Arial;color:green;font-weight:bold">Dipl.-Ing.
<st1:PersonName w:st="on">Marion Hiller</st1:PersonName></span></font></b><b><font size="1" face="Arial"><span lang="EN-GB" style="font-size:8.0pt;font-family:Arial;
font-weight:bold"><o:p></o:p></span></font></b></p>
<p class="MsoNormal"><b><font size="1" color="black" face="Arial"><span lang="EN-GB" style="font-size:8.0pt;font-family:Arial;font-weight:bold"><o:p> </o:p></span></font></b></p>
<p class="MsoNormal"><b><font size="1" color="black" face="Arial"><span lang="EN-GB" style="font-size:8.0pt;font-family:Arial;font-weight:bold">Transsolar Energietechnik GmbH<o:p></o:p></span></font></b></p>
<p class="MsoNormal"><font size="1" color="black" face="Arial"><span lang="EN-GB" style="font-size:8.0pt;font-family:Arial">Curiestraße 2<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="black" face="Arial"><span lang="EN-GB" style="font-size:8.0pt;font-family:Arial">7056</span></font><font size="1" face="Arial"><span style="font-size:8.0pt;font-family:Arial">3
<st1:City w:st="on"><st1:place w:st="on"><st1:PersonName w:st="on">Stuttgart</st1:PersonName></st1:place></st1:City><br>
Telefon: +49 711 67976-0<br>
</span></font><u><font size="1" color="blue" face="Arial"><span style="font-size:
8.0pt;font-family:Arial;color:blue"><a href="http://www.trnsys.de/">http://www.trnsys.de</a><o:p></o:p></span></font></u></p>
<p class="MsoNormal"><u><font size="1" color="blue" face="Arial"><span style="font-size:8.0pt;font-family:Arial;color:blue"><o:p><span style="text-decoration:none"> </span></o:p></span></font></u></p>
<p class="MsoNormal"><b><font size="1" color="green" face="Arial"><span style="font-size:9.0pt;font-family:Arial;color:green;font-weight:bold">Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden</span></font></b><font color="navy"><span style="color:navy"><o:p></o:p></span></font></p>
<p class="MsoNormal"><a name="OLE_LINK1"></a><a name="OLE_LINK2"></a><st1:PersonName w:st="on"><b><font size="1" color="green" face="Arial"><span style="font-size:9.0pt;
font-family:Arial;color:green;font-weight:bold">Stutt</span></font></b><b><font size="1" color="green" face="Arial"><span style="font-size:9.0pt;font-family:Arial;
color:green;font-weight:bold">gart</span></font></b></st1:PersonName><b><font size="1" color="green" face="Arial"><span style="font-size:9.0pt;font-family:Arial;
color:green;font-weight:bold">
– München – New York – Paris <o:p></o:p></span></font></b></p>
<p class="MsoNormal"><font size="1" color="black" face="Arial"><span style="font-size:
8.0pt;font-family:Arial">Geschäftsführer :Diplom-Ingenieur
<st1:PersonName w:st="on">Matthias Schuler</st1:PersonName>, Diplom-Ingenieur <st1:PersonName w:st="on">
Thomas Auer</st1:PersonName>, Diplom-Physiker <st1:PersonName w:st="on">Stefan Holst</st1:PersonName>, Diplom-Betriebswirt
<st1:PersonName w:st="on">Dieter Schnelle</st1:PersonName><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="black" face="Arial"><span style="font-size:
8.0pt;font-family:Arial">Eingetragen beim Amtsgericht
<st1:PersonName w:st="on">Stuttgart</st1:PersonName> HRB 23347, <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="black" face="Arial"><span style="font-size:
8.0pt;font-family:Arial">Steuernummer: 99073/00911,USt-IdNr.: DE 152272639<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold">Von:</span></font></b><font size="2" color="black" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma;
color:windowtext">
<st1:PersonName w:st="on"><st1:PersonName w:st="on">trnsys-users</st1:PersonName>-bounces@cae.wisc.edu</st1:PersonName> [mailto:<st1:PersonName w:st="on"><st1:PersonName w:st="on">trnsys-users</st1:PersonName>-bounces@cae.wisc.edu</st1:PersonName>]
<b><span style="font-weight:bold">Im Auftrag von </span></b>Pauline GELIN<br>
<b><span style="font-weight:bold">Gesendet:</span></b> Donnerstag, 19. September 2013 09:33<br>
<b><span style="font-weight:bold">An:</span></b> David BRADLEY<br>
<b><span style="font-weight:bold">Cc:</span></b> <st1:PersonName w:st="on">trnsys-users</st1:PersonName> (<st1:PersonName w:st="on"><st1:PersonName w:st="on">trnsys-users</st1:PersonName>@cae.wisc.edu</st1:PersonName>)<br>
<b><span style="font-weight:bold">Betreff:</span></b> Re: [TRNSYS-users] problem of sky temperatures</span></font><font color="black"><span style="color:windowtext"><o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span style="font-size:12.0pt"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">Thank you for your answer. Indeed, I read these differences in the manual but I don’t know for which case we need
to use one or other of these sky temperatures definition. <o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">In fact, I have another question about the effects of the value view factor given for walls and windows.
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">According to TRNBUILD manual (page 72), the view factor must impact diffuse and long wave radiation as well as
convective heat transfer coefficients, so it is especially important for windows.
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">When I wanted to check these impacts using the IDSHAD outputs (total diffuse radiation on outside of external surface)
with differents values of view factors (equal to 0 or 0.5 or 1) for walls and windows, I saw no difference in the results.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">Could you explain to me these results ?Should I use another outputs to check these impacts? Am I wrong or right
?Is my understanding of the view factor false?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">Thanks a lot in advance for your answers.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="black" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:windowtext">Best Regards,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"><o:p> </o:p></span></font></p>
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<p class="MsoNormal"><b><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D;font-weight:bold">Pauline GELIN<o:p></o:p></span></font></b></p>
<p class="MsoNormal"><b><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D;font-weight:bold">Ingénieur Conception environnementale<o:p></o:p></span></font></b></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Comic Sans MS"><span lang="FR" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Comic Sans MS"><span lang="FR" style="font-size:11.0pt;font-family:"Comic Sans MS";color:#1F497D"><img border="0" width="79" height="52" id="_x0000_i1028" src="cid:image001.jpg@01CEB523.45782E70" alt="cid:image004.jpg@01CE062A.F4C2C000"><o:p></o:p></span></font></p>
<p class="MsoNormal"><b><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D;font-weight:bold"><o:p> </o:p></span></font></b></p>
<p class="MsoNormal"><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D"><img border="0" width="81" height="13" id="_x0000_i1027" src="cid:image002.jpg@01CEB523.45782E70" alt="cid:image006.jpg@01CE062A.F4C2C000"><o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D">10 avenue des canuts<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D">69120 VAULX EN VELIN<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:8.0pt;font-family:Arial;color:#1F497D">T : 04.37.45.33.33
<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:8.0pt;font-family:Arial;color:#1F497D"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><b><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D;font-weight:bold">Ligne directe : 04.37.45.33.47<o:p></o:p></span></font></b></p>
<p class="MsoNormal"><b><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D;font-weight:bold"><o:p> </o:p></span></font></b></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="FR" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"><a href="www.katene.coop"><b><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:#1F497D;font-weight:bold">www.katene.coop</span></font></b></a></span></font><b><font size="2" color="#1f497d" face="Arial"><span lang="FR" style="font-size:10.0pt;
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<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="FR" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"><a href="http://www.quadriplus-groupe.com"><b><font size="2" color="#1f497d" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:#1F497D;
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<o:p></o:p></span></b></span></font></p>
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<p class="MsoNormal"><b><font size="2" color="black" face="Tahoma"><span lang="FR" style="font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold">De :</span></font></b><font size="2" color="black" face="Tahoma"><span lang="FR" style="font-size:10.0pt;
font-family:Tahoma;color:windowtext">
David BRADLEY [mailto:d.bradley@tess-inc.com] <br>
<b><span style="font-weight:bold">Envoyé :</span></b> mercredi 18 septembre 2013 19:06<br>
<b><span style="font-weight:bold">À :</span></b> Pauline GELIN<br>
<b><span style="font-weight:bold">Cc :</span></b> <st1:PersonName w:st="on">trnsys-users</st1:PersonName> (<st1:PersonName w:st="on"><st1:PersonName w:st="on">trnsys-users</st1:PersonName>@cae.wisc.edu</st1:PersonName>)<br>
<b><span style="font-weight:bold">Objet :</span></b> Re: problem of sky temperatures<o:p></o:p></span></font></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><font size="3" color="black" face="Times New Roman"><span lang="FR" style="font-size:12.0pt">Pauline,<br>
Type69 and Type15 use different algorithms for computing sky temperature. The algorithms are discussed in the 04 Mathematical Reference manual.<br>
Kind regards,<br>
David<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="3" color="black" face="Times New Roman"><span lang="FR" style="font-size:12.0pt">On 9/18/2013 08:40, Pauline GELIN wrote:<o:p></o:p></span></font></p>
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<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="FR" style="font-size:11.0pt;font-family:Calibri;color:#1F497D">Hello,
</span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="FR" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"> </span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D">sorry to ask again the same question but I can’t understand why the values of sky temperature from weather component
type 15 and from component 69 (with inputs from the same type 15) are different.
</span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"> </span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D">Anyone could help me to understand?</span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"> </span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D">Hanks a lot for your answers.</span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"> </span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D">Best Regards,</span></font><span lang="FR"><o:p></o:p></span></p>
<p class="MsoNormal"><font size="2" color="#1f497d" face="Calibri"><span lang="EN-US" style="font-size:11.0pt;font-family:Calibri;color:#1F497D"> </span></font><span lang="FR"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><font size="1" color="#1f497d" face="Arial"><span lang="FR" style="font-size:9.0pt;font-family:Arial;color:#1F497D;font-weight:bold">Pauline GELIN</span></font></b><span lang="FR"><o:p></o:p></span></p>
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