Publications (504)
ARTICLE
DETERMINING VERTICAL WIND SPEED PROFILE IN THE ATMOSPHERIC LIMIT LAYER ON THE OUAHIGOUYA SITE IN BURKINA FASO
Drissa BORO*1, Hagninou Elagnon Venance Donnou2, Alfred BAYALA, Florent P. KIENO & Joseph BATHIEBO
The properties of the vertical profile of the wind speed on a monthly and annual scale at the Ouahigouya site
belonging to the Sahelian climatic zone in Burkina Faso were explored in this study. To do this, wind speed and
temperature data at 10 m above ground and NASA satellite data at an altitude of 50 m in the atmospheric boundary
layer w(...)
wind potential, vertical profile, Monin-Obukhov
ARTICLE
2D Modeling of Solar Cell p-n Radial Junction: Study of Photocurrent Density and Quantum Efficiency in Static Mode under Monochromatic Illumination
Raguilignaba Sam, Alain Diasso, Bernard Zouma, François
A theoretical study of a polysilicon solar cell with a radial junction in static regime under monochromatic illumination is presented in this paper. The junction radial solar cell geometry is illustrated and described. The carriers’ diffusion equation is established and solved under quasi-neutral base assumption with boundaries conditions and(...)
Grain Geometry, Photocurrent Density, Quantum Efficiency
ARTICLE
Silicon Solar Cell Space Charge Region and Capacitance Behavior under Electric Field
Bernard Zouma, Fabé Idrissa Barro, Prince Abdoul Aziz Honadia
This paper investigates theoretically the behavior of the space charge region of a silicon solar cell and its associated capacitance under the effect of an external electric field. The purpose of this work is to show that under illumination the solar cell’s space charge region width varies with both operating point and the external induced ele(...)
Solar Cell, Electric Field, Space Charge Region
ARTICLE
Experimental study on performance and combustion analysis of a diesel engine fueled with Diesel and Jatropha oil blended with heptane
Yomi Woro Gounkaou, Tizane Daho, Ali Diane, Gilles Vaitilingom, Bruno Piriou, Jeremy Valette, Oumar Sanogo, Antoine Béré
This work focuses on blending Jatropha oil with diesel fuel and heptane to improve its physico-chemical characteristics for production of blends and their use as fuel in a diesel engine. The influence of the heptane content was evaluated by comparing the results obtained from the engine (performance and combustion parameters) with those of the(...)
Diesel Engine, Jatropha Oil, Heptane, Blends, Engine Performance
ARTICLE
The Radiative Forcing of Aerosols in a West Africa Sahelian Urban City: Case Study of Ouagadougou
Bruno Korgo, Pétronille Kafando, Bernard Zouma, Nebon Bado, Issa Zerbo, Jean-Claude Roger, Joseph D. Bathiebo
This paper is an assessment of radiative forcing caused by atmospheric aerosols in an urban city in West Africa. It is carried out in Ouagadougou in Burkina Faso and is an illustration of the radiative impact in most of the large
Sahelian urban cities which are under the same climatic influences and whose populations present similarities in t(...)
Aerosols, Radiative Forcing, Scattering, Absorption, GAME Code, AERONET
ARTICLE
Diurnal Variability of the Radiative Impact of Atmospheric Aerosols in Ouagadougou, Burkina Faso: A Seasonal Approach
Bruno Korgo, Bernard Zouma, Pétronille Kafando, Nebon Bado, Martial Zoungrana, Issa Zerbo, Jean-Claude Roger, Joseph D. Bathiebo
The objective of this work is to study the diurnal evolution of the radiative impact of atmospheric aerosols in an urban city located in the West African Sahel and the correlations with the main influencing factors of local climate dynamics. The simulation was performed using a treatment chain including the GAME code. In the methodology, the a(...)
AERONET, Optical Properties, Radiative Forcing, Harmattan, Monsoon, Sahara Desert
ARTICLE
Effective Lifetime Experimental Measurement under External Magnetic Field in Transient Dynamic State Obtained from a Square Electrical Excitation by Open Circuit Voltage Decay Method
Nazé Yacouba Traoré, Raguilignaba Sam, Alain Diasso, Bernard Zouma, François Zougmoré
In this work, we present an experimental transient 3-Dimensionnal study for the minority charge carriers’ effective lifetime measurement under magnetic field in transient dynamic state. The magnitude of the magnetic field B is varied from 0 mT to 0.03 mT. The method used is mainly based on the open circuit voltage decay method. The solar cell(...)
Effective Lifetime, Electrical Excitation, Frequential Dynamic Regime
ARTICLE
P-T-X and P-T-h Diagrams of the Working Pair H 2 0/LiBr at Thermodynamic Equilibrium and Charts that Permit to Determine its Thermodynamic Properties
Yves Christian Nonguierma, Amadou Konfe and Dieudonné Joseph Bathiebo
The thermodynamic properties at equilibrium, in this case, enthalpy, pressure, temperature, mass
fraction, of working pairs are very important for researchers and in the design of absorption
refrigeration systems. Although some authors have carried out their research in this direction by
setting up empirical formulas, there are unfortunatel(...)
Thermodynamic properties; lithium bromide; absorption; diagrams
ARTICLE
Influence of density on foam collapse under burning
Abdoul Baguian, Salifou Koucka Ouiminga, Claire Longuet, Anne-Sophie Caro, Stephane Corn, Antoine Béré, Rodolphe Sonnier
The fire behaviour of flexible polyurethane foams was studied using a cone calorimeter, with a special emphasis on the collapse step. Only one peak of heat release rate, ranging from 200 to 450 kW/m2, is observed for thin foams, depending on the foam density and the heat flux. On the contrary, heat release rate (HRR) curves exhibit two peaks f(...)
polyurethane foam, fire behaviour
ARTICLE
Experimental Measurement of Minority Carriers Effective Lifetime in Silicon Solar Cell Using Open Circuit Voltage Decay under Magnetic Field in Transient Mode
Alain Diasso, Raguilignaba Sam, Bernard Zouma, François Zougmoré
This manuscript presents a simple method for excess minority carriers’ lifetime measurement within the base region of p-n junction polycrystalline solar cell in transient mode. This work is an experimental transient 3-Dimensionnal study. The magnitude of the magnetic field B is varied from 0 mT to 0.045 mT. Indeed, the solar cell is illuminate(...)
Carrier Lifetime, Fitting, Magnetic Field
ARTICLE
THEORETICAL AND EXPERIMENTAL ANALYSIS OF A BOOST CONVERTER
Badiane Modou, Honadia Prince Abdoul Aziz, Barro Fabé Idrissa
A theoretical and experimental study of a conventional boost converter is presented. Based on the real behavior of the components, the conventional boost converter model dealing with both inductive and capacitive losses as well as switching losses is introduced. From this model, the detailed analytical expressions of the voltage gain factor a(...)
Duty cycle, gain factor, efficiency, ESR
COMMUNICATION
Étude de la convection naturelle dans une cavité différentiellement chauffée
KONFE Amadou
On étudie la convection naturelle laminaire dans une cavité carrée rempli d’air dont les deux cotés
verticales sont soumises à une différence de température, tandis que les deux autres horizontaux sont
adiabatiques. Les températures de la paroi chaude et froide sont maintenues constantes. Nous avons
présenté une étude dynamique et thermique(...)
Convection naturelle, cavité carrée/, couplage, convection naturelle, rayonnement
ARTICLE
Towards a "greener" generation of biodiesels
Gilles Vaitilingom, Zéphirin Mouloungui, Anthony Benoist, François Broust, Tizane Daho3 etBruno Piriou
Dans le monde, le pétrole assure 96 % des besoins des transports, lesquels mobilisent 65 % dupétrole consommé et participent à hauteur de 20 % aux émissions de CO2. Afin de réduire la consommationde ressources fossiles, une des alternatives est notamment l’utilisation de « biocarburants ». Cesbiocarburants sont classés en trois générations suc(...)
biodiesel / CAS / résidus / déchets
ARTICLE
Vers une génération plus « verte » de biodiesels
Gilles Vaitilingom, Zéphirin Mouloungui, Anthony Benoist, François Broust, Tizane Daho etBruno Piriou
Dans le monde, le pétrole assure 96 % des besoins des transports, lesquels mobilisent 65 % du pétrole consommé et participent à hauteur de 20 % aux émissions de CO 2 . Afin de réduire la consommation de ressources fossiles, une des alternatives est notamment l’utilisation de « biocarburants ». Ces biocarburants sont classés en trois génération(...)
Mots clés non renseignés
ARTICLE
NIGHT-SKY BRIGHTNESS IN BURKINA FASO: OUAGADOUGOU LIGHT POLLUTION ASSESSMENT AND IMPACT ON THE STARRY SKY OBSERVATION
Sié Zacharie KAM, Moussa SOUGOTI , Sidiki ZONGO , Issoufou OUARMA , Ollé Zachée KAM , Jean KOULIDIATI & Antoine BERE
The quest for well-being and improvement of the populations living conditions in the borders of the big cities have changed habits in terms of lighting. The use of LED lamps and the reduction in the cost of photovoltaic panels, have allowed easy access to electricity nowadays. The lack of education on the nature of outdoor lighting has unfortu(...)
Astronomy, Light Pollution, Dark sky, Ouagadougo