PVsyst's forum

Welcome on PVsyst's forum.
It is currently Mon Jun 21, 2021 3:13 pm

All times are UTC+02:00




Post new topic  Reply to topic  [ 2 posts ] 
Author Message
PostPosted: Sun Jan 24, 2021 10:17 am 

Joined: Sun Jan 24, 2021 10:07 am
Posts: 3
I am facing the problem that I can't set the bifacial module when I use Nearshading.
Is it not possible to set the module when the orientation of the module is uneven?
Can someone please tell me what's going on?


Top
   
PostPosted: Mon Jan 25, 2021 10:53 am 

Joined: Thu Oct 03, 2013 9:03 am
Posts: 91
The bifacial models currently implemented in PVsyst (V7.1.3) are based on an approximation that is valid for long and regular rows.
If you use a 3D drawing in 'Near Shadings', PVsyst will check that the PVsystem is based on a single orientation and rows with regular width and pitch (the row length may vary).
If there is too much variation in the pitch, you will get an error message, saying that the bifacial model cannot be used in this case. This is valid for fixed tilt rows as well as for single axis trackers.

This is also explained in the PVsyst help under:
Project design > Bifacial Systems > Bifacial system: 2-dimensional unlimited sheds
Project design > Bifacial Systems > Bifacial system: 2-dimensional unlimited trackers

If your installation is fixed tilt on an irregular terrain, this typically leads to several different orientations. You may consider gathering all tables in a single orientation group, by using the tool 'Manage Orientations' in the 3D editor of PVsyst. In this case, PVsyst will calculate the irradiance transposition by using a single average orientation, while the shadings will still be calculated with all detail of the drawing. If like this you can get a single orientation group, and the row pitch is regulear, the bifacial simulation becomes possible with PVsyst. You should use this approach only if the variations in terrain slope are small, it is not adapted for hills and steep slopes. You should keep in mind that this will calculate only an approximation of the bifacial contribution.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 2 posts ] 

All times are UTC+02:00


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited