[Radiance-general] Re: Cumulative calculations of irradiance

[Christian Humann]

I've been trying to work out a similar solution for generating a  
composite image of hourly irradiance values over a full year.    
However, rather than cumulative results, as produced with pcomb, I  
want each pixel in the final image to only represent the highest value  
of irradiance that occurs at that pixel location over a years worth of  
hourly runs.  Ex: if a given pixel gets the highest level of  
irradiance on June 21 @ noon then that will be the value given to that  
pixel in the final image.  Has anyone tackled this before? Thanks.

Regards to all,
Chris H
Berkeley,CA



> From: Iván Pajares Sánchez <defunkt at pobox.com>
> Date: June 5, 2008 2:35:36 AM PDT
>
> Hello group,
>
> I am working out some simulations to get some figures that help me  
> estimate irradiance on a building for thermal load comparison. What  
> I am trying to do is to gauge the range of numbers one can get and  
> the differences in different part of the building so I have a basis  
> to speak to the engineer.
>
> To do this I generate my Radiance model with only one material to  
> start with with 50% reflectance. I generate a 1/2 hour series of  
> renderings (with -i switch on).
> Afterwards I add up the irradiances with pcomb to get one picture  
> from which to get the falsecolor scale in kWh / m2.
>
> I'm using falsecolor with -m = 0.001 to get the output in kWh / m2  
> to get daily cumulative irradiances. Is this approach correct?
>
> I'm doing this because RADMAP for windows fails to work (even the  
> example files that come with it) so I wanted to play around with  
> radiance and learn something on the way.
>
>
> I guess my next step is to feed real irradiance data into radiance  
> and foloow the procedure outlined before, Am I in the proper  
> direction?
>
> Thanks for any feedback!
>
> Iván Pajares
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