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How can I deal with an angle of incidence with greater than 90 degree values if I am calculating solar radiation?

closed as unclear what you're asking by tinlyx, Barbarossa, whyzar, ArMoraer, Hornbydd Apr 30 '18 at 17:35

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  • First of all I am confused with different formula available for solar angle of incidence calculation. If i follow the book by John A. Duffie William A. Beckman, there r 3 formula to calculate solar angle of incidence! I implemented all three, but all of them giving different answer. I don't know where is the problem! Even there are few values that are greater than 90 degrees, I know the reason why they are more than 90 but I dont know what to do with those values when calculating solar irradiation (beam / diffuse) formula. – Sukriti Bhattacharya May 1 '18 at 10:10
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It would need to be normalised. divide your non normalised solar radiation value by the Cos of (90°-Local Solar Elevation).

  • can you suggest me some tutorial or paper that does this? any reference? – Sukriti Bhattacharya May 1 '18 at 10:02
  • Try Dewa et Danoedoro, 2017. – B-C B. May 1 '18 at 15:50

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