Bifacial gain

[Age]

Hi,

I would like to calculate the bifacial gains of an EW solar park.

I made a 3D shading scene. East west oriented. Height of 0.8m.

for some reason the second orientation always uses the values height 1.5m and albedo 0.3. and i am not sure why.

do i have a setting wrong?  

thanks in advance

Age

 

[Linda Thoren]

Hi, at the moment PVsyst cannot simulate the backside irradiance for domes. Note that in general the bifacial gain of dome structures is negligible, unless they are installed very high above the ground.

So your results are not really useable like this. The backside irradiation model is a 2D approximation that currently only works on single orientation rows. It does not take into account shading objects from the shading scene, as the rows of panels in the opposite orientation.

Regarding the height above ground (that is defined in the unlimited 2D Model tab) and the albedo, normally it is possible to define this for each orientation if you save the definitions (clicking OK)
 

[Age]

Thank you!  That helped me out. Ill neglect bifacial gains for EW systems for now.

 

Age