Albedo shading component calculation

[ClaireWest]

Hi, how is the albedo shading component (ShdALss) calculated? I have read the help pages on this topic but i am still not clear how this functionally works, sorry.

https://www.pvsyst.com/help/project-design/shadings/calculation-and-model/index.html

https://www.pvsyst.com/help/project-design/shadings/calculation-and-model/treatment-of-the-albedo-component.html#far-shadings

Why does the albedo shading loss have this profile on a clear-sky day (single-axis tracking system): ?

TIA

[Linda Thoren]

Hi,

The shading calculation is indeed explained in the second link you have attached. In general, the higher the tilt, the higher the albedo contribution. Most of the albedo contribution will directly be lost (you see that the albedo loss is indeed following the albedo contribution) since we assume that only the first row is "seeing" the albedo, so that the albedo shading factor will be (n-1)/n (n = number of sheds). The albedo loss is a significant contribution to the global shading losses.