[TRNSYS-users] Re : Radiative exchanges in TRNBuild

[Fabien Morice]

Hello Guillaume,

TRNBuild don't calculate the view factor. It's not a geometrical model.
So, TRNBuild takes all your surfaces and distributes the radiative part proportionally at the surfaces.

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.

Best regards.

Fabien Morice.

----- Message d'origine ----
De : Guillaume Faye <guillaume.faye at gmail.com>
À : trnsys-users at engr.wisc.edu
Envoyé le : Lundi, 11 Juin 2007, 15h19mn 00s
Objet : [TRNSYS-users] Radiative exchanges in TRNBuild


Hello,
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. 
Thank you very much
Guillaume Faye
 
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