[TRNSYS-users] Re : Problem with windows lib

Thu Jul 22 02:00:31 PDT 2010

Damien,

Window 4002, 4102, 4202 and 4302 differ only in size.
The window data was created without spectral data. TRNSYS 16 uses a 2
band model  (visual and nonvisual) and windows created 
without spectral data may cause this problem. Windows with an ID lower
than 9999 are included in the library for backwards compatibility
reasons.

For solving the problem, you may modify properties of the window data in
your BUI by an editor.
I suggest NOT to edit the BASIC library itself. This may leed to
confusion.

For solving the error message TRNSYS calculated a one band model (solar)
only by setting
values for Tvis = Tsol, Rfvis = Rfsol and Rbis = Rbsol of the window
data in the BUI file.

Tsol  0.268 0.270 0.263 0.253 0.243 0.223 0.183 0.116 0.042 0.000 0.207
Abs1  0.327 0.330 0.339 0.345 0.347 0.351 0.367 0.380 0.313 0.001 0.347
Abs2  0.066 0.066 0.067 0.068 0.070 0.071 0.070 0.064 0.051 0.000 0.067
Abs3  0.108 0.110 0.112 0.113 0.110 0.107 0.101 0.082 0.041 0.000 0.100
Abs4      0     0     0     0     0     0     0     0     0     0     0
Abs5      0     0     0     0     0     0     0     0     0     0     0
Abs6      0     0     0     0     0     0     0     0     0     0     0
Rfsol 0.231 0.223 0.220 0.221 0.230 0.247 0.279 0.357 0.554 0.999 0.269
Rbsol 0.231 0.223 0.220 0.221 0.230 0.247 0.279 0.357 0.554 0.999 0.269
Tvis  0.625 0.632 0.615 0.595 0.570 0.523 0.425 0.265 0.097 0.000 0.484
Rfvis 0.137 0.125 0.121 0.125 0.142 0.172 0.226 0.336 0.554 0.999 0.199
Rbvis 0.137 0.125 0.121 0.125 0.142 0.172 0.226 0.336 0.554 0.999 0.199

However, what you want to simulate is window with a very low
conductivity. 
You may modify the conductivity of the glas panes "Cond(W/m2-C     ) "
for reducing the  total u value in the BUI file.

Layer ID#         9061     9052     9062        0        0        0
Tir              0.000    0.000    0.000        0        0        0
Emis F           0.840    0.840    0.070        0        0        0
Emis B           0.070    0.840    0.840        0        0        0
Thickness(mm)      4.0      4.0      4.0        0        0        0
Cond(W/m2-C     )225.0    225.0    225.0        0        0        0
Spectral File     None     None     None     None     None     None

Best,

Marion

  _____  

Von: Damien Palacios [mailto:pseudomino at rocketmail.com] 
Gesendet: Mittwoch, 21. Juli 2010 17:58
An: David Bradley
Cc: trnsys-users at cae.wisc.edu
Betreff: [TRNSYS-users] Re : Problem with windows lib

Yes, 
my TRNSYS version is 16.
As for the windows ID, all those with an u-value of 0.4 are causing the
same error, in my model : 4002, 4102, 4202, 4302.
I join the files needed in a .rar.
Thanks

  _____  

De : David Bradley <bradley at tess-inc.com>
À : Damien Palacios <pseudomino at rocketmail.com>
Cc : trnsys-users at cae.wisc.edu
Envoyé le : Mer 21 juillet 2010, 16h 37min 37s
Objet : Re: [TRNSYS-users] Problem with windows lib

Damien,
  Could you please specify which version of TRNSYS you are using and
which window ID you chose (there are a number of different windows in
the win4lib.dat file). Please also send your *.tpf, *.bui (or *.b17),
and *.lst files as well as any others that would be needed in order to
run the project.
Best,
 David

On 7/21/2010 05:36, Damien Palacios wrote: 

   Hello,

   TRNSYS returns be plenty of these errors in listing result file :

   winlib reader: incorrect selectivity of visual+solar transmission
   caused a negative value for nonvisual Transmission Tra_ang_nonvis =  
   -0.045 for Window-ID       4202 at an angle of   30 ° Tra_ang_nonvis
   is set to 0 for this angle

   I use the library
   C:\Program Files\Trnsys16\Building\Lib\Basic\W4-lib.dat

   Actually, I would need a window with a u-value of 0.1 kJ/h/m²/K , and
   because there are not such window, I use the smallest value : 0.4.
   But for each of the windows with this value, I have the same error.

   Can you help me? At least to know why does this message appears?

   Note: the issue is the same if I try in American\W4-lib.dat,
   German\W4-lib.dat...

   Have a nice day!

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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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