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PostPosted: Tue Mar 26, 2019 1:13 pm 

Joined: Tue Apr 03, 2018 9:47 am
Posts: 3
Hi Pvsyst,

We found new option of "Irradiance optimization" in Pvsyst 6.7.9 version. However, we didn't found any reference or guidance on how it work ?? and it background methodology ??.
when are not sure when to use this option ??.

Request to provide some details on newly available option "Irradiance optimization" in Project design>Orientation Tab.


PostPosted: Thu Mar 28, 2019 10:01 pm 
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Joined: Tue Oct 18, 2016 3:31 am
Posts: 282
I am also interested in knowing more about this and where it originated from, how it works, etc.

Last edited by dtarin on Tue Apr 02, 2019 6:51 pm, edited 1 time in total.

PostPosted: Sat Mar 30, 2019 5:30 am 

Joined: Fri Feb 02, 2018 10:51 pm
Posts: 11
+1 For an explanation.
Or a warning not to check the new box that gives more energy for free. At least a single sentence, slightly vague, release note to tease us but leave us with more questions, only joking.

Best wishes to all

p.s. Request to also include a nice short video with each software release note to illustrate, visually, confirming what's been changed/why and how to use..and more importantly what old forum/help file information is entirely obsolete.

PostPosted: Wed Apr 10, 2019 2:44 am 

Joined: Wed Apr 10, 2019 2:21 am
Posts: 1
Would be nice if an explanation is released with the release notes...

PostPosted: Wed Apr 17, 2019 11:40 am 
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Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1658
The usual tracking strategy defines the tracker's angle in order to minimize the incidence angle for a given sun's position.

This new strategy determines the orientation according to the best irradiance received by the trackers. This may be different than the previous strategy as the transpositon of the diffuse component is proportional to (1 + cos(i) / 2), where i = incidence angle. Therefore the higher tilt, the less transposed irradiance.
For a fully covered weather, the optimal tracker's position will be horizontal (Phi = 0)

In practice on real systems, this strategy may be easily applied by putting 2 irradiance sensors on the tracker, separated by a black wall perpendicular to the tracker: the best orientation is obtained when the measured irradiances are equal.

PostPosted: Tue Jul 02, 2019 6:08 pm 

Joined: Mon Jan 16, 2017 12:07 pm
Posts: 18
Hi, Is it possible to use "Backtracking" and "Irradiance Optimization" in the same simulation?

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