[Radiance-general] Irradiation on a Solyndra solar module

[Lovati Marco]

Dear Andy,
Thank You for your interest, I must apologize, as I simply copied the command from a diva grid based illuminance simulation: I changed the input parameters to -W (Global Horizontal, Diffuse Horizontal)and the output to irradiance "-O 1"(Watt/m2); of course having some mist doesn't make any sense as it is already accounted in the parameters I have as input (which are from a weather station nearby(meters away from the panel)).
About the approximations I just completely trust who wrote the code for Diva, now I will try without any and keep you up to date
Thank You very Much
                                                   Marco

From: Andrew McNeil [mailto:amcneil at lbl.gov]
Sent: 29 January 2015 20:11
To: Radiance general discussion
Subject: Re: [Radiance-general] Irradiation on a Solyndra solar module

Marco,

Puzzling. I'd suggest starting by adjusting the simulation parameters to make sure all ambient rays and direct rays are traced.

Here are the simulation parameters you used:
 -I -h -dp 2048 -ms 0.063 -ds .2 -dt .05 -dc .75 -dr 3 -st .01 -lr 12 -lw .0005 -ab 2 -ad 1000 -as 20 -ar 300 -aa 0.1

Here are the parameters I recommend testing:
 -I -h -dt 0 -dc 1 -lw 1e-5 -ab 2 -ad 2000 -as 1000 -aa 0

If that doesn't help I'd like to see your Solyndra.pts file.

On a side note, this is the second posting where someone is using the -ms parameter. Are people really using mist in daylight simulations these days?

Andy

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