Dear
TRNSYS users, I
am currently working on a project which involves non-orthogonal windows, shaded
by horizontal overhangs. I’d like to use type 34 to model these
overhangs. My windows have different slopes, from 30° to 80° with the horizontal
direction. 1.
Type 109, from which the radiation inputs of
type 34 come, uses the slope of my tilted windows to compute the beam radiation
and the incident angle of direct radiation on this non-orthogonal surface. Is
it enough to tell type 34 that my windows are not orthogonal ? Indeed, the
description of the 1st parameter of type 34 reads: “Type34
assumes a vertical orientation for the window.” The problem is that, my
window not being vertical, an overhang doesn’t have the same impact than
if the window was vertical, since the window is closer to the sun’s zenith
angle. 2.
What length of overhang projection and overhang
gap should I consider ? Mark Duffy’s answer on Fri Dec 11th
2009 suggests that we should take the horizontal distance for the overhang
projection, but is this right even in this case, with a non vertical window ? Should
I take instead the distance in the orthogonal direction from the window to the
end of the projection ? Thanks
for your help. Best
regards, Héloïse
Pelen ETAMINE
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