# PVsyst's forum

Welcome on PVsyst's forum.
 It is currently Sat Aug 08, 2020 5:16 am

 All times are UTC+02:00

 Post new topic  Reply to topic Page 1 of 1 [ 1 post ]
 Print view Previous topic | Next topic
Author Message
 PostPosted: Tue Jul 31, 2012 3:36 pm

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1662
Yes, this is quite normal.
When you tilt the baseline of a collector (rotating around the azimuth line), the plane "true" orientation will change.

For understanding this: please take a cardboard as collector, and position it at, say, 30°south.
Then give a tilt to the base (baseline slope). Now the plane azimuth is defined as the perpendicular to the intersection of your cardboard and the horizontal plane.
And the plane tilt is the tilt accounted perpendiculary to this horizontal line (i.e. the angle between the plane of your cardboard and the horizontal plane)

At the limit of a vertical base line, the azimuth will be (90°-plane tilt) (by respect to original Azimuth if not south).
The calculation of these new orientation angles is not straightforward: it implies 3D rotations matrices. But you can trust the proposition of PVsyst...

This arises on a roof when the tables are set perpendicularly to the slope, and also when you put tables on a sloped terrain (hill).
In the case of a hill, you have usually many different slopes, and PVsyst performs an average for the incident irradiance calculation.
You have a detailed tool for analyzing this situation in the 3D shadings editor, menu "Tools > Edit orientations".

Top
 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Post new topic  Reply to topic Page 1 of 1 [ 1 post ]

 All times are UTC+02:00

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

Search for:
 Jump to:  Select a forum ------------------ PVsyst SA Announcements (read only)    Latest news - Bifacial Modelling and 3D Drawing    PVsyst's forum rules FAQ (read only)    Installation and use of PVsyst    Meteo data    PV Components    Shadings and tracking    Simulations : parameters    Simulations : results    Standalone and pumping systems Your questions about PVsyst    Howto    Problems / Bugs    Meteo data    PV Components    Shadings and tracking    Simulations    Suggestions    Tutorials : Feedback and requests Links    PVsyst website    YouTube Channel