[TRNSYS-users] Multi-obj Opt.

[Chaminda Ranaweera via TRNSYS-users]

Dear Luke,

Thank you very much for your reply. I think you are 
correct. I went through the each and every pages of help 
manual. So, I think your way is the only way to find the 
solar radiation on solar PV panel opening.

But I have to change the tilt angle, Panel array 
configuration and have to find the behavior of power out 
put. I think; Trnsys is not advanced enough for my 
analysis. I think, Matlab programming is much convenient 
for my work.

Yes, we can model array shading effects only with Trnsys. 
Actually I did it for lots of simulations. But my 
supervisor is in the view that we can use Trnsys for 
calculating shading effects on PV panels.

Thank you verymuch again for your answer. I am really 
frustrated and really disappointing. Even Trnsys "Hotline" 
people couldn't answer to my issue.

Chaminda Ranaweera





On Tue, 17 May 2016 19:15:17 +0000
  Luke Witmer via TRNSYS-users 
<trnsys-users at lists.onebuilding.org> wrote:
> Chaminda,
> 
> If you want to leverage TRNSHD with the TRNSYS3D 
>SketchUp Plugin, you will
> need to model the PVs as windows (on each roof surface), 
>as the shading
> insolation matrix is only applied to window surfaces. 
>Also, the surrounding
> building objects need to be modeled as shading objects, 
>as I don't think
> generic walls will be accounted for in the shading 
>matrix calculations.
> Then you can specify a window material made of nothing 
>so that irradiance
> passing through is not reduced by the window material. 
>After that, you can
> have the irradiance passing through that window 
>(representing your pv
> aperture), reduced by shading objects, as an output to 
>compare against
> different configurations or to pass to an actual pv 
>model (though this
> number would only be valid in a pv model if your pv 
>panels have advanced
> power electronics to reduce partial shading losses). I 
>hope that helps and
> is clear enough.
> 
> If anyone has a better way to do this, I'd be interested 
>to know as well. I
> know there are specific components for inter-row pv 
>shading calcs, but
> those don't account for nearby objects.
> 
> Best,
> Luke