[TRNSYS-users] windows in Trnsys

[David Bradley]

Joke,
   I would recommend that you use Window5 to generate a window with the 
correct (or as near as you can make it) u-value and g-value that you 
have been given. Usually, you can get close by starting with the generic 
glass types that are in the Window5 library and by playing with the 
glass and gas layers. Once you have generated the DOE-2 report from 
Window5, the items that you read from the Window5 "result" screen and 
add by hand at the end of the w4-lib.dat file are ONLY for informational 
display in TRNBuild. The frame u-value information in the DOE-2 Window5 
report/w4lib.dat file is ignored by TRNBuild so you need to enter that 
in the window typemanager. There is a handy Figure in the 
TRNBuild/Type56 manual that shows all the information that Type56 pays 
attention to from the w4lib.dat file.
Best,
  David


On 7/5/2010 03:27, Joke De Beuckelaer wrote:
>
> Dear Trnsys-users,
>
> I've some question concerning windows in Trnsys. When you want to 
> implement a window (with a known U-value and g-value) but there is no 
> corresponding window in the library, can you somewhere adapt the 
> U-value and g-value?
>
> I know you can use window5 to make a new window in your library, but 
> sometimes I don't know the layers of my window but just the U-value en 
> g-value. Can you adapt perhaps the values of the additional heat 
> resistance of an external shading device to achieve the wanted value? 
> Or adapt the U-value of the profile?
>
> When you do use window5: you have to introduce a profile too.  But in 
> trnsys, you select the created window under "Glazing". Do you then 
> still have to introduce the U-value of the profile in Trnsys or ... ?
>
> Thanks in advance,
>
>   Joke De Beuckelaer
>   project engineer
>
>
>
> _______________________________________________
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> TRNSYS-users at cae.wisc.edu
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>    

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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