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Dear Eloise, thanks for bringing this
up. The text in the brackets
of the manual should be removed.. If all GESURF values are
set to 0, the beam radiation is treated as diffuse radiation and it is
distributed acc. to the selected diffuse
radiation mode. Best regards, Dipl.-Ing.
Geschäftsführer:
Dipl.Ing. Matthias Schuler, Dipl.Ing. Von: Sok, Eloise
[mailto:Eloise.Sok@saint-gobain.com] Dear TRNSYS users, I have a question regarding the calculation of the beam radiation
distribution under the standard mode. In TRNSYS 17’s manual, it is specified that under the standard
mode for beam radiation distribution calculation, if the GEOSURF values of all surfaces
of a zone are all set to 0, then “the direct radiation is distributed the
same way as the diffuse radiation (by “absorptance” weighted area
ratios)”. But let’s suppose that I run a simulation under the detailed mode
for diffuse radiation distribution and under the standard mode for beam
radiation distribution with geosurf all set to 0. Does it imply that that on
one hand the Gebhart method will be applied for the diffuse part of the
entering solar radiation, and that on the other hand the weighted area ratios
method will be applied for the direct part? Or will the total entering solar
radiation be considered as 100% diffuse and in that case only the Gebhart
method will be applied for calculating the distribution? Thank you in advance for you responses! Best regards, Eloïse SOK -------------------------------------------------- Saint-Gobain Glass France, CRDC A.T.O.M.
Dpt – Building energy performances’ group Tel: +33(0)3 44 92 47 88 Mob: +33(0)7 61 68 06 74 E-mail: Eloise.Sok@saint-gobain.com Confidential-property
of Saint-Gobain, the information contained herein are considered confidential.
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