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01-Applied Mathematics & Information Sciences
An International Journal
               
 
 
 
 
 
 
 
 
 
 
 

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Volumes > Volume 13 > No. 2

 
   

Decomposition Model for Estimating Diffuse Solar Radiation

PP: 285-289
doi:10.18576/amis/130217
Author(s)
M. Harhash, W. Dawoud, A. H. Oraby, M. M. Abdel Wahab,
Abstract
In this paper, a regressive model based on the sigmoid function is presented for estimating the diffuse component of surface solar irradiance from the global irradiance. We consider the correlations between global solar radiation and its diffuse component measured on horizontal incident. The regression equation was tested outside the measurement period (2016) with a root mean square error of about 0.1 and a relative mean bias error of −14.6 0.8%. Results show that the sigmoid behaviour provides more reliable estimates for values of diffuse solar irradiance.

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