Study of A Theoretical and Experimental Model of Direct Solar Radiation At the University of Agadez Experimental Site in Niger

Seydou DJIKA^{1, 2}, Harouna SANI DAN NOMAO^{1, 3}, Makinta BOUKAR^1, and Saidou MADOUGOU¹

¹Laboratoire d'Energétique, d'Electronique, d'Electrotechnique, d'Automatique et d'Informatique Industrielle (LAERT‐LA2EI), Université Abdou Moumouni, Niamey, Niger

²Department of Renewable Energies, University Institute of Technology, University of Agadez, Niger

³Ecole Nationale d'Ingénierie et des Sciences des Energies (ENISE), Université d’Agadez, Niger

Cite this paper:
Seydou DJIKA, Harouna SANI DAN NOMAO, Makinta BOUKAR and Saidou MADOUGOU. Study of A Theoretical and Experimental Model of Direct Solar Radiation At the University of Agadez Experimental Site in Niger. International Journal of Physics. 2026; 14(3):55-60. doi: 10.12691/ijp-14-3-1

Abstract

This work involves evaluating direct solar radiation by applying Kasten’s semi-empirical mathematical model and comparing the results with measurements taken at the University of Agadez experimental site (Agadez urban commune), with the aim of sizing a 20 MWe thermodynamic solar power plant. This study was conducted under three different atmospheric conditions (overcast, average, and clear skies) and using three solar collector tilt angles (0°, 17°, and 30°). Radiation calculations were performed using Excel software by incorporating appropriate equations into a program based on the Kasten model. As for the measurements, they were conducted over ten (10) typical days using two pyranometers. After correcting for the Linke turbidity factor, the resulting direct solar radiation and theoretical annual irradiation are 680 W/m² and 2,979 kWh/m²/year, respectively, compared to measured values of 767 W/m² and 3,010 kWh/m²/year. This study confirms Agadez's strong solar potential for CSP.

Keywords:
DNI Concentrated solar thermal Kasten model sahel region Agadez

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References:

[1]	K. ZAKARIA, “Etude d’une centrale solaire thermique,” Badji Mokhtar Annaba-University, 2017, 1-58.
[2]	S. Y. Manu, “Modélisation et expérimentation d’une microcentrale solaire a concentration : cas de CSP4AFRICA,” 2iE-Ouagadougou Burkina Faso, 2018, 123.
[3]	C. A. OUSMANE, “Centrale Solaire a Concentration Pour Le Milieu Rural Au Niger : Etude Du Concentrateur et Aspects Economiques et Environnementaux”, 2iE-Ouagadougou Burkina Faso, 2017, 62.
[4]	G. W. C. R. H. Aupaix, “Dimensionnement de profils de ménages pour une utilisation plus rationnelle de l’énergie,” no. Padd Ii, Belgique, 2006, 320.
[5]	E. W. Ramdé, Y. Azoumah, A. Brew-Hammond, A. Rungundu, and G. Tapsoba, “Site Ranking and Potential Assessment for Concentrating Solar Power in West Africa,” Nat. Resour., vol. 04, no. 01, pp. 146–153, 2013.
[6]	S. Mohamed, “Le gisement solaire,” Université Mohamed Boudiaf - M’sila, 2015,74.
[7]	M. R. Yaïche and S. M. E. A. Bekkouche, “Conception et validation d’un programme sous Excel pour l’estimation du rayonnement solaire incident en Algérie. Cas d’un ciel totalement clair,” J. Renew. Energies, vol. 11, no. 3, pp. 423–436, 2008.
[8]	S. DJIKA, Évaluation du potentiel solaire thermodynamique aux environs du centre d ’ enfouissement de mâchefer de SONICHAR à Tchirozérine,” UNIVERSITE ABDOU MOUMOUNI, 2022,69.
[9]	B. Chaima, Estimation du rayonnement solaire incident sur un plan incliné par le modèle de Liu-Jordan: région d ’ Adrar, Abdelhafid Boussouf - Mila ,2022,80.
[10]	S. DJIKA, Boubou BAGRE, SANI DAN NOMAO HAROUNA, MAKINTA BOUKAR, Evaluation of Direct Solar Radiation by the Kasten Model Compared to Online Pvgis Data around the Sonichar Clinker Burial Center in Tchirozérine Available online, www.jsaer.com Journal of Scientific and Engineering Research , 2023 , 10 ( 12 ): 107-119 Eval,” vol. 10, no. January, 2024,107–119.
[11]	M. Koussa, A. Malek, and M. Haddadi, “Validation de quelques modèles de reconstitution des éclairements dus au rayonnement solaire direct, diffus et global par ciel clair,” J. Renew. Energies, vol. 9, no. 4, pp. 307–332, 2006.
[12]	M. D. U. Plan et al., “Monographie regionale d’agadez,” vol. 2012.
[13]	M. Mesri-Merad, I. Rougab, A. Cheknane, and N. E. I. Bachari, “Estimation du rayonnement solaire au sol par des modèles semi-empiriques,” J. Renew. Energies, vol. 15, no. 3, pp. 451–463, 2023.
[14]	B. Naima, “Etude du rayonnement solaire dans la région de Batna,” UNIVERSITE DE BATNA;Algérie, 2008,98.
[15]	A. Ricaud, “Gisement solaire et transferts énergétiques,” Université De GERCY-PANTOISE, 2011, 79.
[16]	F. CHABANE, “Modélisation des paramètres de la conversion thermique de l’énergie solaire,” Université Mohamed Khider – Biskra,222.
[17]	A. I. Image, H. Sani, D. Nomao, and M. Boukar, “Study of Four (4) Semi-Empirical Models for Estimating Direct Radiation from the Sun and Modeling for Application to the Solar Thermodynamic System,” Adv. Image Video Process., vol. 10, no. 4, 2022.
[18]	Azwaw, Mansouri Nadir Makhlouf, “Dimensionnement thermique d ’ un récepteur solaire à tour à génération directe de vapeur, Université Mouloud Mammeri, Tizi-Ouzou;2021,68.