Nos productions scientifiques du trimestre

Trimestre Avril -Juin

1ère publication

Technical and Economic Pre-Feasibility Study for a Micro-Hydro Plant and Solar Photovoltaic System for the Eco-Tourist Village of Mandraka

Adélaïde Lareba Ouedraogo, Dominique Bonkoungou, Eric Simonguy, Eric Korsaga, Sami Florent Palm, Sié Kam, Achille Olivier Ravoninjatovo, Dieudonné Joseph Bathiebo

Madagascar is well endowed with energy resources, particularly renewable energies. These include watercourses for hydropower, solar irradiation for photovoltaic solar energy, wind for wind power, as well as exploitable surfaces for bioenergy, although these are currently little exploited. What’s more, the electricity distribution network covers only a small part of the national territory, which excludes most rural areas. As a result, the population continues to consume fossil fuels, while gradually turning to solar energy (autonomous installation). Rural electrification should be totally oriented towards renewable energies, making the most of hydroelectric sites, solar energy, wind power and biomass, so that production costs are low, enabling us to offer a tariff adapted to subscribers’ purchasing power and promote production activities. The aim of this project is to carry out a technical and economic pre-feasibility study of a micro-hydropower plant and a photovoltaic system to supply the village of Mandraka. Initially, field surveys were carried out to establish the consumption profile and estimate household energy expenditure. Next, a sizing, financial pre-analysis and system simulation were carried out to assess the economic interest of the installation. The results of the pre-feasibility study gave a power of 24.64 kW for the micro-hydro plant and 1.58 kW for the solar photovoltaic system, which we oversized to 1.76 kW to compensate for unforeseen circumstances. Finally, a technical-economic study enabled us to obtain a positive NPV for a minimum cost of 1040 Ar, thus concluding that the project is feasible. The results of this study show that most households in this village can afford the cost of electricity consumption.

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Pre-Feasibility Study, Sizing, Micro-Hydropower Plant, Photovoltaic System, Investment Cost

https://doi.org/10.4236/jsbs.2025.151001

Trimestre Janvier-Mars

1ere Publication :

Titre

Improving the Bearing Capacity of Road Soil by Treatment with Cement and Lime: Case of National Road No. 4 in the City of Ouagadougou in Burkina Faso

Auteurs

Bernard Gouba, Boukari Sawadogo, Dieudonné Dabilgou

Résumé

Nowadays, the question of the availability of good quality materials is increas ingly raised in road projects. This has led us to techniques for improving the performance of materials that can be used in road layers. Cement and lime treatment is a well-known technique for improving materials in road con struction . The test is done by adding a small amount of cement or lime to the material to be improved. This amount is determined at various percentages in order to obtain a good result. To carry out our study, it is necessary to study the raw material to see if it meets the standards, otherwise it must be improved. Indeed, for a material to be used in road layers, a minimum bearing capacity of 80% to 98% of OPM is required. Also, in order to understand the evolution of the CBR bearing capacity, we will make our materials suitable for road con struction by mixing them with lime and cement.

Référence bibliographique complète

1] BCEOM-CEBTP, France (1984) Practical Guide to the Dimensioning of Roadways for Tropical Countries. 60-80.

[2] Tchouani, N.J.M. (1999) Soil Mechanics Course, Volume I, Soil Properties, InterState School of Higher Technicians in Hydraulics and Rural Equipment, Ouagadougou.

[3] NF P 11-300 GTR Classification of Soils. [4] NF P 94-051 Determination of the Atterberg Limit, March 1993.

[5] NF P 94-56 Granulometric Analysis; Dry Sieving Method after Washing, March 1996. [6] NF P 94-078 CBR Test after Immersion, Immediate and Immediate Bearing Index, May 1997.

[7] NF P 94-051 Determination of the Atterberg Limit, March 1993.

[8] NF EN 933-8 Test to Determine the Characteristics of Aggregates, August 1999.

[9] Bakouan, D. (2014) Internship Report for Obtaining the Diploma of Civil Engineer ing Engineer, supported at the Nazi Boni University (Burkina Faso), July 2014.

[10] Clotaire, W.D. (2023) Soil Mechanics Course at the Higher Institute of Technology, Teaching Geotechnics (Burkina Faso). https://techno.istburkina.com/course/index.php?categoryid=18

[11] Kiemde, M.S. End of Cycle Internship Report: Geotechnical Laboratory and in Situ Testing, supported at the University of Technology and Management (Burkina Faso). [12] Tran, V.D. (2013) Study of Soil Improvement by Lime Treatment. Master’s Thesis, The University of Liège (Belgium). http://hdl.handle.net/2268.2/2340

[13] Azoumah, K.D.E. (2018) Characteristics of Lateritic Gravel Packers Improved with Cement and Litho Stabilized for Use in Road Construction, supported at 2iE. http://documentation.2ie-edu.org/cdi2ie/opac_css/doc_num.php?explnum_id=2819

[14] Nicolas, C. (2004) Soils Treated with Lime and Hydraulic Binders: Contribution to the Identification and Analysis of Elements That Disrupt Stabilization. Doctoral The sis, Ecole Nationale Supérieure des Mines Saint-Etienne, 189 p.

[15] Millogo, Y. (2008) Geotechnical, Chemical and Mineralogical Study of Clay and Lat eritic Raw Materials from Burkina Faso Improved with Hydraulic Binders: Application to Civil Engineering (Building and Road). Thesis, The University of Ouagadougou.

Mots-clés

CBR Bearing Capacity, Improvement, GAL, Cement, Lime

Lien vers la revue, PDF, HAL, ResearchGate, etc

https://www.scirp.org/journal/ojce

Lien de téléchargement

https://doi.org/10.4236/ojce.2025.151007

2e Publication :

Titre
Investigating the effect of a base transceiver station (BTS) on the power production of a PV module
Auteurs
Patrice Wendlassida Compaore, Guy Serge Tchouadep, Adama Ouedraogo, Dioari Ulrich Combari, Issa Zerbo and Martial Zoungrana
Résumé
In this experimental study, a solar panel was exposed to different intensities of an Electromagnetic Field (EMF) emitted by a base transceiver station (BTS). To avoid influences from other electromagnetic (EM) waves sources the current-voltage characteristics of the PV silicon solar panel was measured, outdoor in free space on an isolated site, in the sub-urban Boassa in West of the Ouagadougou city in Burkina Faso. The solar photovoltaic (PV) panel has been moved from 37 to 500 m from the antenna in order to investigate the effect of the amplitude of the EMF on its output power production. The experimental results showed that from 37 to 50 m, the fill factor (FF), the maximum power output (Pmax) and the conversion efficiency (η) increase respectively by about 2.62, 7.54 and 7.96% for the last two, while the short circuit current (Isc) decreases by about 2.23% compared to the values obtained at the 50 m position. Beyond the distance of 50 m, (r > 50 m) an opposite phenomenon is observed: increase of Isc by about 15%, decrease of fill factor, conversion efficiency (η) and maximum power output
respectively of about 2.1, 25.44, and 8.86% for the last two compared to the values obtained at the 50 m position. The behavior of the fill factor shows that despite the small variation of Voc compared to that of Isc, the behavior of certain electrical parameters such as the conversion efficiency and the maximum power out-put remain strongly influenced by Voc.
Références bibliographique complète
Mots clés
Photovoltaic (PV) module, base transceiver station (BTS), electromagnetic field (EMF), performance, experimental study.
Lien vers la revue, PDF, HAL, ResearchGate, etc.
https://academicjournals.org/journal/IJPS/article-full-text-pdf/664596873074https://www.scirp.org/journal/ojce
Lien de téléchargement
10.5897/IJPS2024.5090

Nos productions scientifiques du trimestre