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PostPosted: Fri Aug 09, 2013 5:57 pm 

Joined: Thu Feb 28, 2013 12:48 am
Posts: 16
Location: Charlottesville, VA, USA
Interesting Andre, thank you.

Can you tell us what tilt this system was modeled at?
If tilted above 0 degrees from horizontal is it possible for you to analyze a zero-tilt (horizontal) single axis system as well?
Those are the systems I have been modeling that are giving me confusing results.

If this is a zero-tilt single axis then it appears that I am getting much different results. I would be happy to send you my models to analyze.

Jason Fisher
Charlottesville, VA USA

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Jason Fisher
Charlottesville, VA, USA


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PostPosted: Tue Sep 03, 2013 8:48 pm 

Joined: Thu Feb 28, 2013 12:48 am
Posts: 16
Location: Charlottesville, VA, USA
Hi Andre,

I have just completed the upgrade to 6.11 and see that we are again allowed to model single axis backtracking trackers using the simple orientation method and no longer are required to construct a 3D scene. When I just tried this I no longer see "Near Shadings: Irradiance Losses" in the report. It was my understanding that the previously discussed diffuse shading's losses added to version 6.10 reported these losses in this category of near shadings loss. Does this mean that diffuse shading losses are not calculated in 6.11 when not using the simple backtracking method (not constructing a 3D scene)? Are these diffuse shading losses only calculated for systems with 3D scene's constructed?

Jason Fisher
Charlottesville, VA USA

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Jason Fisher
Charlottesville, VA, USA


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PostPosted: Thu Nov 05, 2015 8:36 am 

Joined: Thu Nov 05, 2015 6:23 am
Posts: 3
Nice inputs here.
I tried a tracker simulation using backtracking option for a site in Australia. I am seeing a near shading loss of 3.1% which is surprising. Please see below water fall loss diagram. Can you pls let me know what could be wrong here? I have done a very simple shading scene with out any additional shading objects. If you would like to check further i can share the project files pls let me know the mail ID I have to send it to.
Warm Rgrds,
Sanoj James
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LossDgm.png
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PostPosted: Sun Nov 08, 2015 12:58 pm 
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Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1680
Getting shading losses for backtracking is quite normal.
Please see our FAQ How is calculated the Shading Loss on diffuse with tracking systems ?


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PostPosted: Thu Sep 21, 2017 8:17 am 

Joined: Thu Sep 21, 2017 7:52 am
Posts: 1
Hi Guys,

When enabling the back tracking in Single Axis Tracking and defining the 3D model, in version 6.60 I get 0 as shading loss while in versions above that I get 2.3% shading loss. This and the Global Incident in coll. plane makes non-back tracking strategy more favorable in versions above 6.60 in case of energy yield. Can you please explain?


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