Housseyn Karoua

Centre de Développement des Energies Renouvelables | CDER · Solaire Thermique et Géothermie

Experiments have been conducted to determine how several geometrical parameters of V-shaped porous baffles influence flow characteristics and heat transfer in a rectangular channel. Experiments were conducted on geometric parameters, namely, a relative baffle height (e/H) of 0.4–1, a relative baffle pitch (P/e) of 3–6, open area ratio values of 21%...

Heliostats account for 45% of the total cost of a solar power tower, so optimizing their structural is critical to overall plant viability. Static wind charging of heliostats, as well as forces and moments applied by steady wind in any weather, has a high impact on the heliostat components design. For the reason that wind tunnel testing is expensiv...

Fixed speed wind turbines have the advantage of being robust and reliable. They allow a direct connection to the electric. The purpose of the article is to study the aerodynamic behaviour and determine the performance of a fixed speed wind turbine. The work presents an analysis method based on the theory of blade element moments (BEM). The variatio...

In this paper, a solar air heater collector is developed and investigated. A concentrating feature of Linear Fresnel Reflector and the characteristics of flat plate air heaters (LFRAH) collectors are used. In this experimental study, three configurations of the absorber used to improve the thermal performance of LFRAH for the drying and the space h...

In this paper, a solar air heater collector is developed and investigated. A concentrating feature of Linear Fresnel Reflector and the characteristics of flat plate air heaters (LFRAH) collectors are used. In this experimental study, three configurations of the absorber used to improve the thermal performance of LFRAH for the drying and the space h...

The heliostat is an assembly of mirrors or a single mirror above a pedestal. It is oriented mechanically toward the displacement of the sun. It have a relative position depends to the sun and the tower position. For the high ratio of reflection solar rays to the top of a high tower, where the incident solar energy is converted to thermal energy, wh...

In this experimental study two solar technologies concentration and the flat plate collector were combined in one solar air heater with a Linear Fresnel Reflector (SAHF). A rectangular useful duct with 2.32 [m] length and 0.2 [m] width is equipped with and without artificial roughness. This roughness has wrought of steel galvanized 0.4 [mm] thickne...

In this work, we deal with the problem of the Azimuth-Elevation (AE) blind tracking for the heliostats in solar central tower. The variation of the AE heliostat angular positions is supposed to happen in well-defined steps of time. It is the time necessary for updating the heliostat position where the mirror is kept properly aligned to the receiver...

The heliostat is an assembly of mirrors or a single mirror above a pedestal. It is oriented mechanically toward the displacement of the sun. It have a relative position depends to the sun and the tower position. For the high ratio of reflection solar rays to the top of a high tower, where the incident solar energy is converted to thermal energy, wh...

— The heliostat is the most important part in the solar power towers and the correct dimensioning of this component is challenging. Understanding the impact of wind loads on heliostats is important for solar power technologies. Static wind loading of heliostats, including forces and moments applied by steady, wind in any climate, have a strong infl...

Les systèmes photo-thermiques sont influencés par de nombreux paramètres. Le rayonnement solaire, la température ambiante, la température de sortie, la température d’absorbeur et le débit volumique sont les plus importants. Il est évident que les caractéristiques de fonctionnement de tout système solaire et particulièrement son fficacité sont étroi...

In this theoretical and experimental study, we are interested in the effect of the parameters of design on the thermal performances particular the temperature of exit during the flow of a blade of air in the absorbent useful conduit, which placed in the focal zone of a solar collector with effect of concentration linear of Fresnel. The rectangular...

RESUME : Dans cette étude théorique et expérimentale, nous nous intéressons à l'effet des paramètres de conception sur les performances thermiques notamment l'évolution de la température de sortie lors de l'écoulement d'une lame d'air dans le conduit utile absorbeur, ce dernier est placé dans la zone focale d'un capteur solaire avec effet de concen...

Résumé -Cette étude est relative à la caractérisation des sites pour d'éventuelles applications de l'énergie solaire. Elle consiste à l'étude théorique et expérimentale des paramètres d'environnement, structurels et conceptuels qui influent directement ou indirectement sur le fonctionnement d'un capteur solaire plan à air à simple passe. Pour valid...

In this theoretical and experimental study, we are investigated in the effect of conception on the thermal performance in particular the output temperature when a blade of air flows through the absorber of solar collector with concentration effect of Fresnel. The useful duct have a 3,32 m length, it’s placed in the focal line of a linear Fresnel...