Generation of solar irradiance
on inclined surface using along terms measurements
K. Kabidi1*, M. N. Bargach2, R. Tadili2
1 Direction Régionale de la Météorologie du Nord, Direction de la Météorologie Nationale
2 Laboratoire d’Energie Solaire et d’Environnement, Faculté des Sciences de Rabat,
Université Med V – Agdal, B.P 1014, Rabat, Maroc
* Corresponding author. Email: firstname.lastname@example.org
Received: 21 December 2012; revised version accepted: 28 February 2013
Since measurements of global and diffuse irradiances impinging on a sloped surface for most parts of
In this paper, we develop the correlation existing between the clearness index Kt or the nebulosity Kd, and the monthly average daily sunshine fractions. Thirty years of sunshine duration measured data related to 28 Stations over
Using FORTRAN language, GRADS software and Geographical Information System (GIS), monthly maps of solar irradiation impinging on a tilted surface are plotted for the whole country. The values of monthly average radiation on titled surface range between 2.7 kWh.m-2 (in December) in Tangier (Lat: 34°43’N, Long: 05°45’W) and 7.7 kWh.m-2 (in June) in Ouarzazate (Lat: 30°56’ N, Long: 06°54’W).
Keywords: Sunshine duration; Global and diffuse irradiances; Titled surface; Clearness index.