Browsing by Author "Mohammedi, K."

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Analytical modelling and experimental validation of proton exchange membrane electrolyser for hydrogen production
(Elsevier, 2016) Aouali, F.Z.; Becherif, M.; Ramadan, H.S.; Emziane, M.; Khellaf, A.; Mohammedi, K.
Application et adaptation de la triangulation de Delaunay pour la reconstruction de surfaces = Surface reconstruction using and adapting Delaunay triangulation
(2004) Challali, Mohand Oulhadj; Belaidi, Idir; Mohammedi, K.; Belaidi, Abderrahmane; Ishiomin, Guy
La reconstruction intéresse plusieurs domaines d'application et de recherche. Parmi ceux-ci nous trouvons: la génération d'un modèle CAO, la simulation, l'inspection et le contrôle, l'usinage, technologie des prothèses, assistance au diagnostic médical, vision robotique et artificielle, reconnaissance de terrains,…etc. Parmi les techniques de reconstruction d’une surface, nous trouvons celle qui procède par polyèdrisation du nuage de points [Ver 98], [Var 97]. Dans ce papier, nous proposons une telle technique basée sur l’adaptation et l’utilisation de la triangulation de Delaunay en dimension 2D1/2
Approche algorithmique pour la reconstruction de surfaces d'objets complexes basée sur la triangulation de delaunay
(European Journals Inc, 2008) Belaidi, Idir; Challali, Mohand Oulhadj; Mohammedi, K.; Brachemi, B.; Ishiomin, G.
Comparison of solar radiation models
(2014) Behar, Omar; Khellaf, A.; Mohammedi, K.; Ait Kaci, S.
Configuration optimale d’un réseau de neurones adapté à la surveillance en ligne de l’usure des outils de tournage
(2007) Belaidi, Idir; Tahmi, R.; Mohammedi, K.
Nous présentons dans cette étude une approche efficace pour la configuration optimale d’un réseau de neurones multicouches avec rétro-propagation du gradient, spécifiquement adaptée à la surveillance en ligne de l’usure des outils de tournage. Il s’agit de déterminer précisément un nombre approprié de neurones dans la couche cachée pour assurer une fiabilité maximale du système, en exploitant des signaux issus de mesure des efforts de coupe et de l’usure en dépouille. A cet effet, nous avons développé un algorithme, basé sur le modèle de rétro-propagation du gradient d’erreurs, et présentant le double avantage d’éviter l’apparition des phénomènes de surapprentissage et de minimums locaux
Contribution to the design of a Parabolic trough collector with composite material using GRP pipes scrap
(2017) Baali, Brahim; Benmounah, A.; Kari, D.; Mohammedi, K.
The world revolution is moving towards a low-carbon and sustainable development. When environmental costs and considerations of security of supply are included, renewable energy becomes the alternative to be considered. Among renewable energies, Parabolic Trough Collector power plants constitute the biggest share of the installed concentrating solar power technology. The bearing structure is the most expensive part of a parabolic trough power plant. It has the function to carry the mirrors in the right position, to give stability to the troughs and to allow an exact Sun tracking. To fulfill these functions, structures must meet certain requirements. In particular, the stiffness requirements are very high. It’s obvious that an inappropriate carrier structure should involve additional material and manufacturing costs. Composite materials have great potential to be suited for development of renewable energy structures. It refers to any structure with two or more distinct materials that are combined to create an engineered product with properties greater than the sum of its parts. Glass reinforced polyester (GRP) with E-glass as the reinforcing fiber is the most common form of composite construction. GRP pipes scraps derived from cutting process can be revalorized and used in the bearing structure of a parabolic trough. The advantage of these materials lies in their high mechanical strength, corrosion resistance and low density compared to metals. Additionally, their high stiffness allows longer troughs so that the number of pylons and tracking units can be reduced, which reduces costs. The stiffness of GRP pipes combined with lightweight structure allows the use of weaker foundations and monitoring mechanisms. A lightweight structure is also less susceptible to deformations generated by its own weight. In addition, light structures reduce the energy demand for collector tracking.
Contribution to the modeling and simulation of solar power tower plants using energy analysis
(Elsevier, 2014) Benammar, Samir; Khellaf, A.; Mohammedi, K.
Energy recovery from the treatment water plant of Lakhdaria for electricity production
(2019) Iguercha, Amina; Ferhat, B.; Mohammedi, K.; Bouaziz, M.
he water that reaches our taps follows a path represented by the pipelines. It must be supplied with energy so that it can circulate along the pipeline, which therefore creates a link between energy and water. Water treatment plants in Algeria consume electrical energy for its pumping and lighting systems. The objective of this work is the study of feasibility of recovering energy at loads breezes which are generally installed on the field to break the water pressure to the reservoir. This gives an opportunity for innovation in the water sector, bringing water and energy without Co2 emissions and with inexhaustible energy and economic able to provide hydroelectric power almost continuously.
Étude de préfaisabilité du turbinage des eaux de la station de traitement de Koudiet Acerdoune/Algérie
(Mouloud Mammeri University of Tizi-Ouzou, 2022) Iguercha, Amina; Zouaoui, S.; Mohammedi, K.; Bouaziz, M.; Kari, D.
Cette étude vise à récupérer l'énergie résiduelle de l’eau à son arrivée dans la station de traitement d'eau par turbinage, au lieu de continuer à la dissiper comme on le fait actuellement au moyen de robinets brises-charge. Une analyse de la faisabilité technique du projet et une évaluation du potentiel hydroélectrique disponible ont été accomplies, avant de proposer différentes options pour l’installation des équipements de turbinage. En utilisant cette méthode, le maximum de quantité d'énergie qui peut être récupérée a été estimée à 7,44 GWh, celui de la quantité de carbone économisée a été estimé à 446,210 tonnes CO2. Nous concluons notre projet par une évaluation de la rentabilité des aménagements hydroélectriques.
Hybrid system energy management and supervision based on fuzzy logic approach for electricity production in remote areas
(IEEE, 2012) Berrazouane, Sofiane; Mohammedi, K.
The uncertainty of the renewable resources is a major impediment for successful implementation them for generation an electrical power to supply an isolated area. The combination of several renewable sources (wind and photovoltaic) with a diesel generator is suited to electricity supply of remote areas. The purpose of a hybrid power system is to produce energy at all times requested by consumers and if possible to produce it from renewable sources, the stochastic nature of renewable energy makes fluctuation of real power on the network therefore on the frequency. This problem can be solved or avoided by satisfying the real power supply-demand balance constraint in the hybrid energy system. Using battery bank system can increase the penetration of renewable energy and absorb the rapid fluctuation due to the stochastic nature of renewable energy, that, it increases the difficulty of managing all these systems in real time, ensuring the quality of energy supplied. The objective of this work is to propose a methodology to design a fuzzy logic controller coupling with stateflow to improve its performances.
Influence of maintenance on the performance of a wind farm = Wpływ serwisowania na wydajność farm wiatrowych
(2013) Benmessaoud, T.; Mohammedi, K.; Smaili, Youcef
Les Plastiques Renforcés de fibres de Verre (PRV) Solutions durables à des problèmes complexes
(URMPE, Faculty of Technology, M.Bougara University, Boumerdes 35000, Algeria, 2018) Baali, Brahim; Benmounah, A.; Mohammedi, K.
L'industrie des canalisations s'est intéressée aux matériaux composites à matrice organique dès les années cinquante L'intérêt pour ce type de matériau résulte principalement de sa légèreté associée à des caractéristiques mécaniques élevées, de sa résistance à la corrosion et d'un comportement à la fatigue amélioré par rapport à l'acier et aux alliages d'aluminium Les matériaux composites sont devenus incontournables par cette combinaison de propriétés qu’en général ne se trouve pas dans tout autre matériau traditionnel ou classique
Modelling and experimental analysis of a PEM electrolyser powered by a solar photovoltaic panel
(Elsevier, 2014) Aouali, F.Z.; Becherif, M.; Tabanjat, A.; Emziane, M.; Mohammedi, K.; Krehi, S.; Khellaf, A.
Numerical Study of Viscous Fingering in Heterogeneous Porous Media
(2022) Djebouri, Hassane; Zouaoui, S.; Mohammedi, K.
The displacement of a fluid by a second immiscible fluid is a fundamental process which is relevant for many technological applications, particularly in the petroleum industry. Water is the fluid widely used to push oil to production wells. During this immiscible displacement, a viscous fingering instability appears at the water-oil interface. This undesirable phenomenon leads to a low oil sweeping efficiency. To prevent this situation, techniques called EOR (Enhance Oil Recovery) are used. These methods have technical, economic and environmental disadvantages. Therefore, the objective of this work is to seek a rational use of EOR techniques by determining the right place and the appropriate time to operate them. In many previous studies, the effects of viscosity ratio, interfacial tension and flow rate are investigated. In this study, we numerically investigate the effect of the heterogeneity of the medium and the presence of the fracture on this phenomenon. Three different configurations are studied. The obtained results allowed to locate the regions where the behaviour of the instability varies during displacement in the porous medium, regions where instability is increasing and others where it remains constant. a qualitative comparison between the different cases is also made.
Optimisation multi-objectif des parametres de conception d’un robot delta dedie a l’usinage a grande vitesse
(2011) Belaidi, Idir; Mansouri, K.; Maiza, B.; Mohammedi, K.; Bouziane, A.
Cet article présente un modèle pour l’optimisation multi-objectif des paramètres de conception d’un robot DELTA dédié à l’usinage à grande vitesse, basée sur la mise en oeuvre de l’algorithme génétique NSGAII sous Matlab™. Le conditionnement de la matrice jacobienne et la capacité d’accélération de la nacelle sont les fonctions ‘objectif’ du modèle d’optimisation, tandis que les forces extérieures de coupe agissant sur la nacelle, les limites cinématiques articulaires, la déformation des barres, les configurations singulières, ainsi que les forces des moteurs, qui doivent être compatibles avec les limites de performances attendues, représentent les contraintes à respecter
Parameter optimization via cuckoo optimization algorithm of fuzzy controller for energy management of a hybrid power system
(Elsevier, 2014) Berrazouane, Sofiane; Mohammedi, K.
Performance analysis and economic evaluation of a solar power tower in Algeria
(IEEE, 2013) Boudaoud, S.; Khellaf, A.; Mohammedi, K.
Simulation numérique de déplacements polyphasiques en milieu poreux hétérogène stratifié
(European Journals Inc, 2009) Djebouri, H.; Mohammedi, K.; Belaidi, Idir; Mabrouki, B.
A computational code was used to solve a three phase displacement problem in stratified heterogeneous porous media. The simulator can solve basic equations of flow and transport for several components (more than 19 components). These basic equations are: the equation of conservation of the mass, pressure and the equation of energy. The discretization of the equations used the finite difference method with an implicit scheme for pressure and explicit for the saturation. The simultaneous flow of three fluid phases in a porous media is frequent in several industrial processes particularly in oil industry. The modelling of this type of flows is very complex, however the computer tool gives the possibility of simulating satisfactorily the very complex phenomena of assisted oil recovery
Solar tower plant implementation in northern algeria : technico economic assessment
(IEEE, 2013) Boudaoud, S.; Khellaf, A.; Mohammedi, K.
State of the art on enhanced oil recovery with CO2 sequestration for low carbon industry
(Aljest, 2017) Atia, A.; Mohammedi, K.
The growing concerns over the global warming due to the increase in the global concentration of greenhouse gases in the atmosphere has increased the interest in examining various techniques to reduce the emission of these gases and for low carbon dioxide industry. A main component of greenhouse gases is carbon dioxide (CO2). A promising long term solution for mitigating global heating is to inject CO2 into geological formations; either for CO2 sequestration or enhanced oil recovery, or a combination between the two solutions. A suitable choice of geological formations for CO2 injection includes petroleum and gas reservoirs, water formation leg of the oil/gas reservoir or separate deep saline aquifers, deep-sea sediments and coal beds. This study aims to setup a state of the art on this problem