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PostPosted: Mon Oct 22, 2018 10:59 am 

Joined: Thu Aug 23, 2018 1:16 pm
Posts: 2
Hi, I am a new user of PVsyst and I am using it to analyze solar production on the roof of urban area surrounded by high-rise buildings, which
From what I read, buildings seems could not to be counted as "horizon" but only as "near shading" objects.
If my site is located in the middle of a city with many buildings nearby (in different height, shape, and direction), instead of drawing the buildings one by one in your system, or importing a lot 3D data into the scene, would more general data from tools like Suneye be able to help? (Could I simply treat the buildings as city skyline and analysis them like horizon?)

PostPosted: Thu Oct 25, 2018 6:55 pm 
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Joined: Tue Oct 18, 2016 3:31 am
Posts: 290
Hi Amy,

From the help section, it recommends shading objects should be considered as "far" if they are a distance away from the array which is equal to 10x the size of the array. How this is determined is not known to me. Personally, for urban areas, I have modeled the buildings in the shade scene as near shading objects. It would be interesting to see the comparison between Suneye data converted to a far horizon profile versus the near shading method.

far shading.jpg
far shading.jpg [ 86.27 KiB | Viewed 7988 times ]
PostPosted: Fri Oct 26, 2018 2:17 am 

Joined: Thu Jul 09, 2015 5:34 am
Posts: 44
I think you should model at least the closest buildings in the 3D scene or you would loose the partial shading behavior that horizon line doesn't produce.
Best regards

PostPosted: Mon Nov 12, 2018 11:25 am 

Joined: Thu Aug 23, 2018 1:16 pm
Posts: 2
Dear Solarguru & Michele,

I has been on trip and couldn't reply earlier but thanks a lot for both of your insights. I think I will try the Suneye data for my cases as most of those buildings are definitely over 10 times away from my site (and keep using 3D drawings for those near shading objects.

Best Regards,

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