Publications (357)
ARTICLE
Broadband noise reduction by circular multi-cavity mufflers operating in multimodal propagation conditions
B. Ouédraogo, R. Maréchal, J.-M. Ville, E. Perrey-Debain
In this study, sound propagation through a circular duct with non-locally lining is investigated both numerically and experimentally. The liner concept is based on perforated screens backed by air cavities. Dimensions of the cavity are chosen to be of the order or bigger than the wavelength so acoustic waves within the liner can propagate para(...)
Broadband noise, Muffler, No locally reacting liner, Scattering matrix
ARTICLE
Correlation of Global Solar Radiation of Eight Synoptic Stations in Burkina Faso Based on Linear and Multiple Linear Regression Methods
Ousmane Coulibaly and Abdoulaye Ouedraogo
We utilize the multiple linear regression method to analyse meteorological data for eight cities in Burkina Faso. A correlation between the monthly mean daily global solar radiation on a horizontal surface and five meteorological and geographical parameters,which are the mean daily extraterrestrial solar radiation intensity, the average daily(...)
Global solar radiation, linear and multiple linear regression, correlation, synoptics station, meteorological data
ARTICLE
Influence of Construction Materials and Building Orientation on Building Thermal Load in Hot and Dry Tropical Climate
Ousmane Coulibaly , Frederic Kuznik , Dominique Baillis and Abdoulaye Ouedraogo
Abstract: This paper is concerned with the determination of the thermal energy performances of individual houses built with “H” shape bricks in hot and dry tropical climate (different cities of Burkina Faso and the city of Bamako in Mali). The bricks’ matrices include three void spaces which are filled during construction with eithe(...)
“H” shape bricks’, clay-grass bricks, clay bricks
ARTICLE
Influence of Construction Materials and Building Orientation on Building Thermal Load in Hot and Dry Tropical Climate
Ousmane Coulibaly , Frederic Kuznik , Dominique Baillis and Abdoulaye Ouedraogo
This paper is concerned with the determination of the thermal energy performances of individual houses built with “H” shape bricks in hot and dry tropical climate (different cities of Burkina Faso and the city of Bamako in Mali). The bricks’ matrices include three void spaces which are filled during construction with either clay-gra(...)
“H” shape bricks’, clay-grass bricks, clay bricks
ARTICLE
Numerical Simulation of Cu(In,Ga)Se2 Solar Cells Performances
Daouda Oubda, Marcel Bawindsom Kebre, François Zougmoré, Donatien Njomo and Frédéric Ouattara
This paper presents a numerical characterization of copper-indium-gallium-diselenide thin film solar cells using one
dimensional simulation program (SCAPS-1D). We have performed an optimization of the performances of the standard Mo/Cu(In,Ga)Se2/CdS/ZnO solar cells using current-voltage and quantum efficiency methods. With a CuIn0.7Ga0.3Se2(...)
Numerical simulation, SCAPS-1D, CdS thickness, temperature, RS, RSh
ARTICLE
Synthesis, characterization and femtosecond nonlinear saturable absorption behavior of copper phthalocyanine nanocrystals doped-PMMA polymer thin films
S. Zongo, M.S. Dhlamini, P.H. Neethling, A. Yaod, M. Maaza, B. Sahraoui
In this work, we report the femtosecond nonlinear saturable absorption response of synthesized copper phthalocyanine nanocrystals (CPc-NCs)-doped PMMA polymer thin films. The samples were initially characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), UV–Vis and scanning electron microscopy (SEM) techniques. The crystal(...)
Z-scan, Femtosecond laser, Nonlinear, saturable absorption, Copper phthalocyanine, Nanocrystals
ARTICLE
Détermination d’années météorologiques types utilisées pour la simulation thermique et énergétique des bâtiments de dix villes du Burkina Faso
Ousmane COULIBALY, Emmanuel OUEDRAOGO, Abdoulaye OUEDRAOGO et Jean KOULIDIATI.
Les problématiques énergétiques actuelles conduisent à améliorer la conception des bâtiments ainsi qu’à accroître l’utilisation des systèmes utilisant les énergies renouvelables (ENR). La mise en place de ces objectifs passe par l’évaluation des performances thermiques et énergétiques grâce à des codes de simulation détaillés tel que TRNSYS. D(...)
année météorologique type, simulation sous TRNSYS, charges thermiques, isolation
ARTICLE
External magnetic field effect on bifacial silicon solar cell's electric power and conversion efficiency
Issa ZERBO, Martial ZOUNGRANA, Idrissa SOURABIE, Adama OUEDRAOGO, Bernard ZOUMA, Dieudonné Joseph BATHIEBO
Abstract:This article presents a modelling study of external magnetic eld effect on a bifacial silicon solar cell's electric power and conversion efficiency.
After the resolution of the magnetotransport equation and continuity equation of excess minority carriers, we
calculate the photocurrent density and the photovoltage and then we deduce(...)
Bifacial silicon solar cell, conversion efficiency, electric power, magnetic field, operating point
ARTICLE
Modelling Study of Magnetic Field’s Effects on Solar Cell’s Transient Decay
Senghane Mbodji, Martial Zoungrana, Issa Zerbo, Biram Dieng, Gregoire Sissoko
Experimental setup of transient decay which occurs between two steady state operating points is recalled. The continuity equation is resolved using both the junction dynamic velocity (Sf) and back side recombination velocity (Sb). The transient excess minority carriers density appears as the sum of infinite terms. Influence of magnetic field o(...)
Solar Cell, Recombination Parameters, Magnetic Field
ARTICLE
A 3D Modelling of Solar Cell’s Electric Power under Real Operating Point
Mayoro Dieye, Senghane Mbodji, Martial Zoungrana, Issa Zerbo, Biram Dieng, Gregoire Sissoko
This work, based on the junction recombination velocity (Sfu) concept, is used to study the solar cell’s electric power at any real operating point. Using Sfu and the back side recombination velocity (Sbu) in a 3D modelling study, the continuity equation is resolved. We determined the photocurrent density, the photovoltage and the solar cell’s(...)
Electric Power, Grain Size, Grain Boundary Recombination Velocity, Polycrystalline, Solar Cell, Junction Recombination Velocity
ARTICLE
Nonlinear optical properties of natural laccaic acid dye studied using Z-scan technique
S. Zongo, K. Sanusi, J. Britton, P. Mthunzi, T. Nyokong, M. Maaza, B. Sahraoui
We have investigated the nonlinear optical properties, including the optical limiting behaviour for five different concentrations of laccaic acid dye in solution and a thin film obtained through doping in poly (methyl methacrylate) (PMMA) polymer. The experiments were performed by using single beam Z-scan technique at 532 nm with 10 ns, 10 Hz(...)
Mots clés non renseignés
ARTICLE
On the capacitance of crystalline silicon solar cells in steady state
FABE IDRISSA, BARRO MOUSTAPHA SANE , BERNARD ZOUMA
In this work, an analytical approach is presented for modeling the capacitance of crystalline silicon solar cells. Based on a one-dimensional modeling of the cell, the excess minority carrier density, the photovoltage, and the capacitance are calculated. The motivation of this work are two-fold: to show base doping density and illumination eff(...)
Mots clés non renseignés
ARTICLE
Linear and nonlinear optical absorption characterization of natural laccaic acid dye
S. Zongo, S. M. Dhlamini, A. P. Kerasidou, P. Beukes, B. Sahraoui, M. Maaza,
We report on the optical performances of laccaic acid dye in solution at different concentrations and dye–poly(methyl methacrylate) composite thin films. The linear spectral characteristics including optical constants, i.e. refractive index (n) and extinction coefficient (k), were carried out in a comprehensive way through absorbance, fluoresc(...)
Mots clés non renseignés
ARTICLE
Influence of chemical potential on water transport in a hygroscopic soil
Samuel Ouoba, Fabien Cherblanc, Jean-Claude Bénet, Jean Koulidiati
Concerning the description of mass transport in a porous media, particularly in soil, the question is to know what are the main mechanisms to consider during transport phenomena for a best description of these transports. The answer to this question requires good understanding on thermodynamic law to include in the transport process for a good(...)
Chemical Potential, Transport, Hygroscopic Soil
ARTICLE
Caractérisation mécanique et thermophysique des blocs de terre comprimée stabilisée au papier (cellulose) et/ou au ciment.
Emmanuel Ouedraogo , Ousmane Coulibaly , Abdoulaye Ouedraogo, Adamah Messan
Cet article présente une étude expérimentale portant sur la caractérisation de matériaux locaux utilisés dans la construction des bâtiments. Ces matériaux sont des blocs de terre compressée et stabilisée au ciment et/ou au papier. Ces matériaux composites utilisés pour l'enveloppe du bâtiment ont une grande stabilité à l’eau. Les mesures des(...)
Blocs de terre comprimée Papier (cellulose) Propriétés mécaniques Propriétés thermophysiques