[TRNSYS-users] shm file creation issue

[Marion Hiller]

Dear Pauline,

 

You have to be aware that changing the GEOMETRY mode from “3D_Data” to
“Manual” deletes all the geometric information.

Therefore, it is important that you save the last version with the
GEOMODE=3D_Data. 

 

Adding/deleting surfaces changes the geometry and it really depends on
WHAT you change if your shading matrix is still valid.

 

The shading matrix includes sunlit fraction for external windows. The
link between the SHM and the surface in the B17 file is

done by the surface ID. 

If your modifications doesn’t effect the shading and you don’t change
the external windows which are included in the SHM file,

the shading matrix can be used and will be correct for these windows.

 

If your changes effect the shading than you have to perform the changes
in Trnsys3D. You can use the “update” function of TRNBuild
to create an update IDF file. 

 

Best regards,

 

Marion

 

  _____  

Von: Pauline GELIN [mailto:p.gelin at katene.fr] 
Gesendet: Freitag, 15. April 2011 09:21
An: David BRADLEY; Marion Hiller; trnsys-users-bounces at cae.wisc.edu
Betreff: shm file creation issue

 

Dear all, 

 

First of all, thank you very much for your answers to my earlier
questions. I really appreciate and hope to do the same later when I am
better. 

 

Meanwhile,  I have one big problem for my projects. So I am taking the
liberty to  send you my concern again.

 

After drawing my building and its shading objects with the TRNSYS3D
plugin in Sketchup, I want to modify it in TRNBuild (for example to add
a window, so I change the geometry mode on manual). 

after doing this, I can’t generate a shm file (shading matrix). I guess
it is because links for calculations were cut by manual mode. 

I would like to know, for my next projects, if I can generate this file
before the modifications, and then switch to manual mode. 

Will the shading datas be correct?

Are they calculated  based on the location of walls or real windows ones
?

 

Thank you very much in advance for your help. 

 

Pauline Gelin, 

Katene engineer, fluid design office. 

 


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20110415/ba308399/attachment-0001.htm>