Comparative study of two models to estimate solar radiation on an inclined surface

Abstract

Our work is focused on the study of the solar radiation received on three inclined surface: 32°, 60° and 90° facing south. So, we proposed two theoretical models: Brichambaut and Liu Jordan models. Brichambaut model takes into account two input parameters (local time, day number), Liu & Jordan takes into account the measures of the solar irradiance (diffuse and global radiations received on horizontal plane). We tested a day 10-02-2011. We noted that the Brichambaut model gives best results, the maximum relative errors are equal to: -0.43 %, -0.60 %, 0.76 % respectively for the angles 32°, 60°, 90°. While for the Liu & Jordan model we obtained the following errors: 1.55 %, 1.56 %, and 3.92 %.