[Radiance-general] Sun angles,

[tbleicher at arcor.de]

At a first glance the script seems fine.

But your problem is most likely that gensky does not know about the
absolute irridiance values of a particular sky. It only creates a distribution
pattern with an unspecified total value. If you want to create a sky with
ie. 50000lux you can specify this with one of the -b/-B or -r/-R options.

You can find typical values for the sky illuminance at your location in
climate data files which are available for various energy simulation packages.

Regards,
Thomas


----- Original Nachricht ----
Von:     G V DEEPAK <deepak.gv at ufl.edu>
An:      Radiance general discussion <radiance-general at radiance-online.org>
Datum:   23.03.2009 18:38
Betreff: [Radiance-general] Sun angles,

> Hello Everyone,
> 
> I am trying to find illuminance values on an yearly basis, I am 
> expecting to get different values for different seasons. Say if we 
> compare between march nad december, we should get higher values of 
> illuminance for december as compared to march. But I am getting 
> almost same values for both the months.
> 
> I am not sure if the software is considering sun angles in 
> calculations.
> 
> I am running this script to find the values,
> 
> 
> 
> #!/bin/csh -f
> 
> set mon=12
> set month=March
> set day=21
> set coord=(-a 30.00 -o 82.35 -m 84)
> rm $month.out
> while($day<23)
> foreach hr(08 09 10 11 12 13 14 15 16 17)
> echo "hr=$hr"
> set skypar=($mon $day $hr +i $coord)
> echo "$month/$day/$hr">>$month.out
> oconv room.rad '\!gensky '"$skypar" sky.rad>hr.oct
> mkillum -ab 0 -ad 1024 -av 0.1 0.1 0.1 hr.oct "<" 
> windowillum.rad>illumination.rad
> oconv -i hr.oct outside.rad Conv-0.rad illumination.rad>hour.oct
> rtrace -h -I -ab 1 -ad 4096 -as 128 -av 0 0 0  
> hour.oct<mainsamplesupwards.inp|rcalc -e 
> '$1=47.4*$1+120*$2+11.6*$3'>>$month.out
> #`./newglares.csh hr.oct $month.out`
> echo " ">>$month.out
> rm hr.oct
> end
> @ day++
> echo "day=$day"
> end
> 
> 
> Let me know if there is anything wrong with this.
> 
> Thank you
> 
> 
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