Hello,
Apparently, "the lower a window's solar heat gain coefficient(=solar factor) or shading coefficient, the less solar heat it transmits, and the greater is its shading ability". But, if the shading coefficient is the same as the shading %, which is "average shading on the surface", shouldn't it be the other way around? Shouldn't a surface which is less shaded than another transmit MORE solar heat? I'm puzzled...
Can anyone enlighten me, please?
Thank you,
Alice
AVG SHADE changes when I use direct only
Hello,
I find that the AVG SHADE column in the solar exposure (analysis tab) changes when I check the box direct only: the percentages become smaller! So I have two questions:
- Shouldn't the AVG SHADE stay the same, whether I'm considering the total incident radiation or only the direct?
- And, supposing it's not the same, shouldn't it at least be MORE shaded when I check the direct only box, since the diffuse radiation isn't there anymore?
Finally, I have yet another question: what about the shading coefficients I get with the sunpath calculation tool? How are they calculated? And why aren't they the same as either the direct or total AVG SHADE?
And what about when I choose "shading" with the solar analysis tool? Are the hourly percentages in the graph related to the AVG SHADE I get in the table below the graph?
Basically, I would like to know which one of all these shading percentages I should consider when I want to see if my shading devices are efficient in the summertime and in the wintertime...
Thank you for your help!
Regards,
Alice