Dear Damien,
I don’t know what you
did, but the geometric part of you’re the surface wasn’t there anymore.
This happens when you set
the geomode to manual.
Well, I recreated the
data and placed it into your B17 file and the amtrices are created as expected.
However, have in mind
that turning on the detailed radiation mode for longwave radiation slows down
your simulation significantly.
I recommend to setup
everything and make test runs with the standard mode for longwave radiation.
When everything works
fine then turn it on.
Marion
Dipl.-Ing.
Marion Hiller
TRANSSOLAR:
KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in
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DE152272639
Geschäftsführer:
Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer,
Dipl.Phys. Stefan Holst, Prof.
Dipl.-Ing. Bleicher
Von: Damien Gondre
[mailto:damien.gondre@insa-lyon.fr]
Gesendet: Montag, 21. November
2011 11:35
An: trnsys-users@cae.wisc.edu
Betreff: [TRNSYS-users] Problem
with View-Factor Matrix and detailed radiation mode
Dear Trnsys-Users,
I
try to model a double-skin facade on Trnsys, using Trnsys3d, the multiple nodes
feature and Contam.
The
double-skin facade is a 1.2-meter wide and 2.8-meter high zone that is split
vertically in four 0.7-meter high zones separated by virtual surfaces that are
not imported in TRNBuild. I have imported the SketchUp model into Trnbuild. I
have moved the nodes of the double-skin façade into one single zone.
I have set the radiation modes to “detailed
model” (for beam, diffuse and longwave radiation) only in
zones where I want to perform detailed radiation calculation. So I think
I’m all set to generate the view-factor matrix file but TRNBuild
doesn’t calculate it: I don’t get any error when I click on Generate < Generate View-Factor Matrix but there is no matrices in the *.vfm file that is generated (only
zones ID numbers and names, and a 0 below each line – see attached file: it looks like detailed radiation mode is not selected
in any zone).
I
use Trnsys 17.00.0019, Trnsys3d version 1.0.5.2 and TRNBuild 2.0.167.
I’m
sure I’ve done something wrong but I can’t find my mistake in the
user-guide or in the trnsys-users archives.
Does someone know how I could generate proper view-factor
matrices?
I’m also facing the same problem with the shading matrix. I defined a shading group in Trnsys3d but it seems like TRNBuild ignore it when calculating the *.shm file: “No window is shaded. Therefore no shading matrix file *.SHM is written!” (even if I’m pretty sure several windows are shaded).
I tried to compare my *.bui file to the *.bui file in the 3D_Building example folder. I noticed that there is a missing part in my *.b17 file in the section _EXTENSION_BuildingGeometry _. Indeed the _EXTENSION_BuildingGeometry_END_ statement comes right after the description of the vertices. There is no part with description of vertices used by each wall of each zone like in the example file:
zone EG_GB
wall 1 1 2 3 4
wall 2 5 6 7 8
[...]
I also noticed that when I try to update the Trnsys3d file to go back in SketchUp, description of surfaces comes with description of zones only for virtual surfaces so that when I open the updated Trnsys3d file in SketchUp, only virtual surfaces are drawn.
I think these two comments might help solving the problem.
Any
idea would help,
Thank
you,
Damien.
Attached:
*.idf, *_b17.idf, *.b17, *.vfm, *_shd.log, *_updated.idf