<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial, helvetica, sans-serif;font-size:10pt"><DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif">Hello Guillaume,</FONT></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif"></FONT> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif">TRNBuild don't calculate the view factor. It's not a geometrical model.</FONT></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif">So, TRNBuild takes all your surfaces and distributes the radiative part proportionally at the surfaces.<BR></FONT></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif">But, if you are interesting by the view factor of short wave radiation of the Sun which come through the window, maybe you should have a look on "GEOSURFACE" ! It's the way to distribute this gain as you want. By example, you can put Geosurface equal to 1 for your floor. It's means that all the short wave radiation of the sun arrive on your floor. Warning ! The sum of the Geosurface (of the same zone) must be equal to 1 and TRNBuild doesn't check that ! If you don't put the geosurface, TRNBuild will distribute the radiative part proportionally at the surfaces of the zone.</FONT></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif"></FONT> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif">Best regards.</FONT></DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif"></FONT> </DIV>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica, sans-serif"><FONT face="arial, helvetica, sans-serif">Fabien Morice.</FONT><BR></DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif">----- Message d'origine ----<BR>De : Guillaume Faye <guillaume.faye@gmail.com><BR>À : trnsys-users@engr.wisc.edu<BR>Envoyé le : Lundi, 11 Juin 2007, 15h19mn 00s<BR>Objet : [TRNSYS-users] Radiative exchanges in TRNBuild<BR><BR>
<DIV>Hello,</DIV>
<DIV>I am working with the software TRNBuild. I did not find in the TRNBuild's help the way the radiative exchanges between the different surfaces are calculated. In particular, I'd like to know how the view factor from a surface to another is calculated. So if someone has the answer, I'd like to have it. </DIV>
<DIV>Thank you very much</DIV>
<DIV>Guillaume Faye</DIV>
<DIV> </DIV>
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