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best model for diffuse irradiance and irradiance model for inclined plane


anees

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Hello 

Hope that you all are good and thanks for helping me everytime here 

i want to want to know what is best model for irradiation on inclined plan ? Perez??

2) what is best model for diffuse irradiation??

Project locations are UK and Germany 

Thanks  

 

 

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Hi anees,

there is no simple answer to this question. Based on our studies we recommend the usage of the "Hofmann" model for diffuse irradiance*, especially when simulating in one-minute resolution. As model for the inclined plane we recommend the "Hay & Davies" model.

You can find out more here:

https://help.valentin-software.com/pvsol/en/calculation/irradiation/diffuse-irradiation/

https://help.valentin-software.com/pvsol/en/calculation/irradiation/irradiation-onto-inclined-plane/

 

If you really want to dive deep into the models, I'd recommend our paper on the influence of the various models on the energy yield:

https://www.mdpi.com/1996-1073/10/10/1495

 

* disclaimer: This model was developed by us as part of my PhD thesis, so our opinion might be biased :)  But we tested and validated it a lot, see the paper here: https://www.mdpi.com/1996-1073/10/2/248

 

Hope that helps, kind regards,

Martin

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