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Stefan,<br>
One of the restrictions of Type68 is that the obstruction azimuth
angles must be evenly spaced between -180 and 180 degrees absolute angles
(in other words not relative to the window). The only thing that you are
able to choose is the angle step size. A 22.5 degree step size would
result in a data file line of:<br><br>
-180.0 -157.5 -135.0 -112.5 -90.0 -67.5 -45.0
-22.5 0.0 22.5 45.0
67.5 90.0 112.5 135.0
157.5 <br><br>
for azimuth angles that are behind the view angle of the window, you can
simply enter a value of 0 for the obstruction height. Type68 calculates
the effective obstruction height internally if you do not set it
yourself. In the most recent release of the code (16.00.0038, June 2005),
Type68 was modified so that it produces an error if it runs into problems
with the specified azimuth angles.<br>
Kind regards,<br>
David<br><br>
<br>
At 09:37 2/17/2006, Stefan de Kool wrote:<br>
<blockquote type=cite class=cite cite=""><font face="arial" size=2>Dear
all,<br>
<br>
I have 2 horizontal windows, shaded by the same object, but from
different angles, so I use two Type68 shading masks (one with 6 and one
with 7 azimuth angles). I don’t trust the results however because when I
set one of the obstructions to zeros (all betas = 0), the beam radiation
is ok (equal to solar radiation) but the diffuse radiation is less than
the diffuse radiation output from type16. As trnsys does not now the
relative position of the windows (as far as I can see), I do not see why
this would happen. Has anyone any suggestions? Below are the obstruction
files I use (for debugging I set one to all-zeros and the other to all
100, these are not the actual values of the obstructions) <br>
<br>
obstructionA.dat:<br>
-------------------------<br>
1<br>
0<br>
0<br>
33 33 40 90 155 155<br>
100<br>
100 <br>
100 <br>
100 <br>
100 <br>
100<br>
<br>
<br>
obstructionB.dat:<br>
------------------------<br>
1<br>
0<br>
0<br>
18 18 15 25 70 88 88<br>
0 <br>
0 <br>
0 <br>
0 <br>
0 <br>
0 <br>
0<br>
<br>
<br>
Met vriendelijke groeten,<br>
Stefan de Kool<br>
</font><font face="Times New Roman, Times"> <br>
</font><font face="arial" size=2>Cauberg-Huygen Raadgevende
Ingenieurs<br>
Lokatie Rotterdam<br>
<br>
</font>
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<br>
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