Confusion Regarding Irradiance Calculation

  • David
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21 Jun 2021 18:45 #9733 by David
Replied by David on topic 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 ?

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  • Paul Gilman
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21 Jun 2021 20:30 #9734 by Paul Gilman
Replied by Paul Gilman on topic Confusion Regarding Irradiance Calculation
That "G" value should be equivalent to the subarray "POA total irradiance after reflection".

Best regards,
Paul.

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  • David
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24 Jun 2021 14:56 #9746 by David
Replied by David on topic 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 ?

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  • David
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28 Jun 2021 20:02 #9753 by David
Replied by David on topic Confusion Regarding Irradiance Calculation
Hey Paul,

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

Thanks!

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  • Paul Gilman
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30 Jun 2021 15:16 #9754 by Paul Gilman
Replied by Paul Gilman on topic Confusion Regarding Irradiance Calculation
Hi David,



The θi 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.
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  • David
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30 Jun 2021 17:50 #9759 by David
Replied by David on topic Confusion Regarding Irradiance Calculation
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 ?

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