Partitioning

[PVsystUser]

PVsyst V6.2.16

I have a 2P project, half cell with 28 modules in series (string length). I can define partitioning in 3 different ways but the results of shading animation is not the same and also the iso diagram is not the same. I included the screen shots below for all there methods. Please advise on which method is the best method to use for partitioning.  

[Michele Oliosi]

Hi,

There is no object management window in PVsyst 6, so I assume you are using a more recent version. Which version are you using ? 
I have tried to see if solution 1 had a bug in version 8.0.19, but everything works fine.

You are probably correct that solution 2 may have an issue sometimes. The zone tool is rather old and sometimes misbehaves. Solutions 1 and 3 should be equivalent.

 

[PVsystUser]

You are right, it was a typo, my version 7.2.

Do you have any idea why my shading scene in method one does not show proper shading animation? I don't even see the dotted lines that show partitioning is done, but the shading factor table looks good for a backtracking which is 0 everywhere. I afraid that it produces zero because shading is not working at all and not because of correct partitioning.  

[Michele Oliosi]

I see ! 

I just remembered that in this version (7.2) there is a bug for trackers. In the object management window, the number of partitions is not affected to the right variable. It is connected to the size of the partitions instead which in turn makes it not work. Please use option 3 or update the PVsyst version.

 

[PVsystUser]

Thanks!

I used method 3, but there is an issue I explained in the picture below: although I have defined same rectangle sizes for rectangle string the final rectangles are not the same and I think it shouldn't be like that because 28 modules in series is valid for the whole scene. 

Edited 20 hours ago by PVsystUser

[Michele Oliosi]

As you can see in the frames above what you have highlighted ("Number of rectangle-strings"), on your table there is a non-integer number of partitions.

This means that either your tables are not consistent with the string length (can be an integer multiple or a simple fraction), or the length 31.75 is not exactly correct as a string length.

The difference in length you are seeing is probably just the 0.54 and 0.34 remainder of the partitions that has shifted the partitions on the table.

If your tables are just a multiple of a string length, the easiest is to use "Number of rectanlge-strings" on the tables to simply divide the string in the correct number of partitions.