Shading factors

[cvernay]

Good morning M. Mermoud,

I have a question about the use of shading factors. 3 factors are provided in the Near shading definition:

- shading factor table for beam, depending on solar azimut and elevation ;

- shading factor for albedo and diffuse (one value each).

Is the following formula correct?

GTI_no_shading = irr_beam + irr_diff + irr_alb

GTI_corrected = irr_beam(azS,elS) * factor_beam(azS,elS) + irr_diff * factor_diffuse + irr_alb * factor_albedo

Best Regards

Christophe Vernay

[André Mermoud]

Yes, this is the correct way of estimation the global irradiance with shadings on the plane.