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

[Anne-Kathrin.Albrecht at 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 at ise.fraunhofer.de
http://www.ise.fraunhofer.de



Von:    David BRADLEY <d.bradley at tess-inc.com>
An:     Anne-Kathrin.Albrecht at ise.fraunhofer.de, 
Kopie:  trnsys-users at 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 at 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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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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d.bradley at tess-inc.com

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