Dear Marion,
Again a problem :-)
Still the same project. Everything worked fine with the shading matrix.
But now I've juste changed the windows: instead of one big window it’s divided into three smaller windows (see picture in attachment). All the rest is exactly the same as before.
But again an error when I want to generate the shading matrix, this time:
So it’s another kind of error. Any idea of the cause?
Kind regards,
Joke De Beuckelaer
project engineer mep
VK HEALTHCARE | BUILDINGS | INDUSTRY | INFRA
Value by design
VK ENGINEERING Avenue Clemenceaulaan 87, 1070 Bruxelles Brussel, Belgium
t +32 2 414 07 77 f +32 2 414 04 98 m +32 473 97 01 50 e joke.d@vkgroup.be w www.vkgroup.be
-----Oorspronkelijk bericht-----
Van: trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] Namens Marion Hiller
Verzonden: donderdag 19 mei 2011 10:34
Aan: TRNSYS-users
Onderwerp: [TRNSYS-users] WG: 2nd error generating shading/insolation matrix -> too many shaders on projection plane
Dear Joke,
the previous email was sent accidentally. I didn't finish typing the equation. Please delete the previous one.
I debugged your project and it turns out that there are too many shaders
projected on the plane window/wall plane for clipping.
The shading routine isn't designed to calculate each lamella of a louver
for each window of a building. In addition each of your lamellas consist
of 6 surfaces. This results in 3040 shading surfaces!!!!
The solution is simplification without a significant loss of accuracy
(see attached image):
- delete all shading louvers except one for each orientation
- replace the six surfaces of a lamella by one sloped surface (the
diagonal
surface in the shading box).
For these windows a shading matrix is calculated und the shading is
calculated automatically.
For the other windows you set the external shading factor to an input.
You define Ntype 103 (IBSHAD) and Ntype 104 (IDSHAD) for the windows
with the shading matrix. For each orientations this input is calculated
by an equation in the TRNSYS Project file
SHAD_ x_y_z = 1 - (IBSHAD+IDSHAD)/Window_area /IT_x_y_z
with
IT_x_y_z ... total incident radiation on kJ/hr on orientation x_y_z
If you still have trouble, please send me your IDF file.
Kind regards,
Marion
Dipl.-Ing. Marion Hiller
TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen
und Nutzerkomfort in Gebäude
Munich - New York - Stuttgart + 49.711.67976.0
Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.:
DE152272639
Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer,
Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher
-----Ursprüngliche Nachricht-----
Von: Joke De Beuckelaer [mailto:joke.d@vkgroup.be]
Gesendet: Donnerstag, 19. Mai 2011 08:09
An: Marion Hiller
Cc: TRNSYS-users
Betreff: RE: Re: [TRNSYS-users] Error: generating shading/insolation
matrix
Dear Marion,
It's strange that the error occurs because the surface number>999. When
I deleted all the shading except 1 rectangle, the same error occurred.
Or is this number (999) with the surfaces of the model included?
In attachment you can find the original idf file. Normally I've send all
my files already, didn't you receive them?
I'm working with Trnsys version 17.00.0018.
Thanks a lot already for all your help and I hope you can find the
problem,
Kind regards,
Joke De Beuckelaer
project engineer mep
VK HEALTHCARE | BUILDINGS | INDUSTRY |
INFRA
Value by design
VK ENGINEERING Avenue Clemenceaulaan 87, 1070 Bruxelles Brussel,
Belgium
t +32 2 414 07 77 f +32 2 414 04 98 m +32 473 97 01 50 e
joke.d@vkgroup.be w www.vkgroup.be
-----Oorspronkelijk bericht-----
Van: Marion Hiller [mailto:hiller@transsolar.com]
Verzonden: dinsdag 17 mei 2011 13:27
Aan: Joke De Beuckelaer
CC: TRNSYS-users
Onderwerp: AW: Re: [TRNSYS-users] Error: generating shading/insolation
matrix
Joke,
the error message is due to too surface numbers > 999. The surface
number can't be written in the log file (artsmetiers7_shd.log) and ***
are written instead.
*** Notice at time : 0.000000
Orientation of wall SURF=***: azimuth angle= 180.00°, slope= 90.00°
Orientation of wall SURF=***: azimuth angle= 0.00°, slope= 0.00°
In order to see why the surface numbers are so high (starting with
3993 instead of 1) I need to need the original *.idf and check the
import function.
With what version of TRNSYS17 are you working? I have in mind that we
fixed such a bug created by the import.
Kind regards,
Marion
-----Ursprüngliche Nachricht-----
Von: Joke De Beuckelaer [mailto:joke.d@vkgroup.be]
Gesendet: Donnerstag, 12. Mai 2011 08:58
An: duffy@tess-inc.com; trnsys-users@cae.wisc.edu
Betreff: Re: [TRNSYS-users] Error: generating shading/insolation matrix
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