[TRNSYS-users] Antwort: Re: Problems with Trnsys3d

[Anne-Kathrin.Albrecht@ise.fraunhofer.de]

Hallo,

thank you both for your quick reply!

1. I also thought of implementing the
windows by treating them as walls and since it´s the least complicated
solution for the problem I did it that way now.

2. Loading the idf file into a new just
opened Sketchup didn´t work, but the idf text file really helped. Thank
you!

Best regards,
Anne 
________________________________________________

M.Eng. Anne-Kathrin Albrecht

Division Solar Thermal and Optics
Fraunhofer Institute for Solar Energy
Systems ISE
Heidenhofstrasse 2, 79110 Freiburg,
Germany
Phone:+49(0)761/4588-5734 Fax:+49(0)761/4588-9550
anne-kathrin.albrecht@ise.fraunhofer.de
http://www.ise.fraunhofer.de



Von:      
 David BRADLEY <d.bradley@tess-inc.com>
An:      
 Anne-Kathrin.Albrecht@ise.fraunhofer.de,

Kopie:      
 trnsys-users@cae.wisc.edu
Datum:      
 03.07.2012 17:36
Betreff:    
   Re: [TRNSYS-users]
Problems with Trnsys3d

---

Anne-Kathrin,
  For 1, I would suggest that you ignore the windows in the basement
as far as Trnsys3D is concerned. My guess is that their impact on the house
will be more significant as a source of energy conduction and less as a
solar gain to the basement. Because of that, I would treat them as a small
(opaque) wall instead of as a window. Once you get to TRNBuild, you can
associate them with some thermal properties that account for the thermal
insulation of the glass but doesn't bother with the light transmittance.

  For 2, I am not sure there is a specific tool. In TRNBuild, you
should be able to tell what zone they are part of. I would then hide all
the other zones in the Trnsys3D project. If the remaining zone isn't too
complicated, you can always delete it and start over. You might also be
able to look at the *.idf file itself (which is text) to determine the
surface name (a bunch of letters and numbers) that have been associated
with the surface. 

Best,
 david 


On 7/3/2012 04:20, Anne-Kathrin.Albrecht@ise.fraunhofer.de
wrote:
Hallo everybody,

I have several problems with Trnsys3d:

1.        I am working on a building that has a cellar with windows. When I convert the idf-file into a TRNBuild-file (b17 idf-file) the cellar walls are shown with a wrong area (takes the net area = gross area minus windows instead of the gross area) and the windows are missing. Is it not possible to include windows in walls that have the ground as a boundary? Of course the house has a light well, but I thought I could solve the problem by just drawing the windows and setting them to a high shading factor.

2.        Is it possible to list all the drown surfaces in a building? I´ve always used the surface search so far but I have two lines (drown by accident) that are recognized as walls with an area of 0.001 m² and I don´t know where they are, so it´s like searching  for a needle in a haystack...

Best regards,

Anne-Kathrin Albrecht

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Thermal Energy Systems Specialists, LLC
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