Jump to content

Shading factor


Kumiko Sakai
 Share

Recommended Posts

Hello,

I have a question about Shading factor.

The more I broaden the pitch of the array, the lower the factor becomes.

In the 3D shading scene,I only draw arrays.

So I think the factor gets higher because there is no shading obstacle without arrays.

Is there any misunderstanging about Shading factor? Please teach me.

Link to comment
Share on other sites

The shading factor is the ratio of the shaded area, with respect to the total sensitive area.

For a same collector tilt, if the pitch increases, the mutual shadings (shading factor) will decrease of course.

I don't understand the rest of the question.

In the 3D construction, you can have a look on the shading factor using the "Animation" (button on bottom left).

Link to comment
Share on other sites

Hi, Andre

Thank you for your reply.

I have two more questions.

In your reply, the shading factor is the ratio of shaded area.

Does the shading factor =1 mean that the point is fully shaded ?

(But in the tutorial, the factor=1 is no shadings.)

In the tutorial, the shading factor table is for the positions on the sky hemisphere "seen" by PV plane (page 53) .

It's like the "Height" depends on the tilt of PV plane.

Does the "Height" mean the degree depndindg on the tilt of a PV plene or simply sun height?

Sincerely,

Kumiko

Link to comment
Share on other sites

The shading factor is the ratio of the shaded area, with respect to the full sensitive area.

Therefore it is 0 when ther is no shading.

Please tell me on which page of the tutorial the shading factor is one for no shadings.

I checked and didn't see anything like that.

(NB: This was the case in very old versions of PVsyst (perhap's in versions <=4, I don't remember).

In the shading factor table, the height is defined as the angle between the concerned direction and the horizontal plane.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...