Shading Losses of unlimited tracking systems

[MarVF6]

Hello,

I have a question to the shading losses of unlimited tracking systems in reference to unlimited sheds. "Backtracking" and "Irradiance optimization" is activated. To compare the shading losses I created a table with the losses of both simulations.

fixed tilt tracking system

GlobHor 990,2 990,2

GlobInc 1091 1231

BeamInc 522,3 630

DifSInc 400,4 398,6

Alb_Inc 2,535 11,71

ShdLoss 9,306 22,58

ShdBLss 1,624 0

ShdDLss 4,792 11,36

ShdALss 2,43 11,22

I'm wondering about the higher total ShdLoss with the tracking system. It makes sense that the Shd albedo losses are in total higher due to the higer albedo incidence irradiation and that the shading beam losses are zero because of the backtracking. But what is the reason of the higher shading diffuse loss?

I try to understand the simulation for a better validation of the results.

I'm thankful if you could help me.

Best regards,

Jan

[kjs55]

Hello, I happened to see this post and discussed it with a colleague and we have a few initial Qs:

1. What's the GCR in both cases (fixed tilt and tracking)?

2. What's the tilt angle of the fixed tilt PV system?

3. What's the tracker rotation limit (for the tracking PV system)?

Thanks.