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Dear Trnsys users,
I have some problems to implement in Trnsys Type 56
with Prebid/Trnbuild an internal shading device with known data of transmission,
reflection and absorption coefficients. I also have calculated the g-value of
the whole system (glass + shading). I don't understand how these data correspond
to the input data in Prebid/Trnbuild:
- internal shading factor: I have estimated this by
1 - (g glass + sunblinds)/(g glass)
- reflection coefficient of internal device: is
this the real reflection coefficient of the sunblinds of corresponds this to
REFLISHADE (as explained in the manual of Prebid/Trnbuild)
I also don't understand the equation 4.8.8.1.44 in
the Trnsys15 manual or (44) in Trnsys16 - Trnbuild manual that explains the
irradiation that is transmitted trough a window with an internal shading. Some
parameters in this equation aren't explained. Where e.g. can you give a value to
the 'solar transmittance of all window panes'? What is the difference between
Iref,z and I?
best regards,
Hilde Breesch
PhD student Buildings & Climatic Control Department of Architecture & Urban Planning Ghent University J. Plateaustraat 22, B-9000 GENT tel. +32 9 264 78 61 fax. +32 9 264 41 85 e-mail: Hilde.Breesch@UGent.be http://allserv.ugent.be/~hbreesch/research |