Confusion Regarding Irradiance Calculation

Where can I find the beam effective irradiance angle used in eqn 10.18 ? Is it the b value found in 4.15, 4.18 or 6.15 ?

That "G" value should be equivalent to the subarray "POA total irradiance after reflection".

Best regards,
Paul.

Where can I find the beam effective irradiance angle used in eqn 10.18 ? Is it the b value found in 4.15, 4.18 or 6.15 ?

Hey Paul,

Can you let me know about my other question regarding the beam effective irradiance angle in equation 10.18.

Thanks!

Hi David,



The θ_i variable in those equations is the incidence angle in radians as mentioned in the description of Equation 10.16. The incidence angle in degrees is shown as AOI elsewhere in the manual, and defined in Equation 5.1.

Best regards,
Paul.

Are you saving AOI is equal to the beam of incidence theta_b in 10.18 ? So when solving 10.16 for Ta_b I should be using AOI as my theta_i in 10.16 ?