Hi,
I have question regarding equation in section 9.2 from latest PV Technical Refference (
www.nrel.gov/docs/fy18osti/67399.pdf
).
1. What is
Gd in equation 9.7 ? Is it equal to
Id? so let's say
Id is based on equation 6.4, then
Gdh is equal to
Ed (sun diffuse radiation)? Because if you compare the eq. 6.4 and 9.7, the angle adjustment
(1+ cos (beta))/2 will be canceled out.
2. In the equation 9.11,
Sdss is somehow proportional to
Gsky,red, where in equation 9.9 G
sky,red is affected by
number of rows. But as I concerned, the
Sdss value will not change if the
number of rows is changed. So what is this '
sky diffuse irradiance factor' in result?
Thank you
Daniel
