01.International Symposium on Mechatronics and Renewable Energies El-Oued 10- 11 December 2018
Permanent URI for this collectionhttps://dspace.univ-eloued.dz/handle/123456789/1375
Browse
Recent Submissions
Item Geothermal energy development and future possible applications in Algeria(University of Eloued, 2019-02-24) Nacer Lebbihiat; Abdelmalek Attia; Abdessamia hadjadjThe main objective of the present study is to review the development of geothermal energy utilization in Algeria, giving its historical development and opportunities. Geothermal energy is used for direct utilization in Algeria, which is among the main countries in Africa in geothermal direct use applications. The inventory of thermal springs has been updated with more than 240 springs identified. The highest temperatures recorded were 98 °C in Hammam El Maskhoutin (Guelma) and 118 °C in Biskra, in the western part of the country. In the south, the thermal springs have a mean temperature of 50 °C. The northeastern zone of the country, covering an area of 15,000 km2, remains potentially the most interesting geothermal area, with the Barda spring giving 100 L/s. Geothermal energy is a relatively benign energy source, displaying fossil fuels and thus reducing greenhouse gas emissions. So it is expected that geothermal energy development will significantly speed up in the country if the geothermal law becomes effectiveItem Application of Hamilton equations to Dynamic Systems(University of Eloued جامعة الوادي, 2018-12-10) Soumia AYACH HAMRAOUI, 2nd Kamel KHOUNFAIS, 3rd Noureddine MENECEURIn this presentation, instead of the Lagrangian formulation of the dynamics, we will apply the Hamiltonian formulation to be able to model and control system swidely used in applications in robotics. In the first part, we will see that using a Legendre transformation, we can associate with Lagrange's equations, which second-order equations, a system of first-order differential equations called canonical equations of Hamilton. To validate Hamilton's efficiency of formalization, the case of a manipulator with flexible joints was treated.Item Oscillation de deux parois poreuses dans les vagues(University of Eloued جامعة الوادي, 2018-12-10) Boualia, Y.; Chioukh, N.; Hamoudi, B.; Laffane, Z.Cette étude examine la performance hydrodynamique du système oscillant qui est constitué de deux plaques poreuses qui se déplace horizontalement sous l'action des vagues régulières. Chaque plaque est traitée comme un oscillateur à ressort-masse-amortisseur avec un degré de liberté. Une unité de chambre à une seule vague est créée, qui se déplace horizontalement et ne permet pas le débordement des vagues. Dans ce travail, une solution semi-analytique est développée au moyen de la méthode d'expansion à fonction propre couplée à la dynamique du système à deux degrés de liberté. La porosité des parois est prise en compte en utilisant une expression efficace issue de la loi de Darcy.Les résultats numériques obtenus sont présentés et discutés en fonction de plusieurs paramètres de structures appropries qui sont la réflexion et la transmission des vagues, l’amplitude et la puissance générée par le mouvement des plaques.Item Modélisation numérique des échanges de chaleur et de masse dans la zone de garnissage au sein d’une tour de refroidissement atmosphérique(University of Eloued جامعة الوادي, 2018-12-10) MENECEUR, Noureddine; BOULAHROUZ, Salim; KHOUNFAIS, KamelDepuis quelques décennies, les tours de refroidissement sont utilisées pour refroidir l'eau chaude en pulvérisant une partie de l'eau dans un flux d'air. Ce système comprend trois parties : pulvérisation, zones de pluie et la zone la plus importante appelée zone de garnissage. Ce travail intéressé à la modélisation numérique du transfert de chaleur et de masse à travers cette zone, via un code de calcul informatique basé sur cinq équations différentielles ordinaires. Le présent modèle est validé à l'aide de données expérimentales obtenues à partir d'un prototype réalisé d'une tour de refroidissement dans le laboratoire, dans lequel l'erreur maximale est inférieure à 5%. Les résultats obtenus ont montré que la hauteur et l'efficacité optimales de la tour sont affectées par l'humidité de l'air en entrée ; de plus, le mode de transfert de chaleur dans la zone de garnissage est dominé par l'évaporation.Item Caractérisation de chauffage par induction à haute fréquences(University of Eloued جامعة الوادي, 2018-12-10) Hannachi, Mohamed Tahar; Daheche, BilalL’induction électromagnétique a pour particularité de générer la chaleur directement à l’intérieur du matériau à chauffer. Cette particularité présente de nombreux atouts par rapport aux méthodes de chauffe plus standard, notamment la réduction des temps de chauffe et des rendements élevés, ou encore la possibilité de chauffer de façon très locale. Les hautes densités de puissance mises en jeu permettent d’obtenir des vitesses de chauffe très rapides. Les variations des ces paramètres intervenant dans ce phénomène de chauffage sont mises en évidence par des courbes explicatives.Item Mathematical Model and experimental testing of a plane mirror augmented box solar cooker with trapezium shape(University of Eloued جامعة الوادي, 2018-12-10) Yettou, F.; Gama, A.; Rathore, N.; Khelifi, R.Solar cooking technology is one of the attractive options in developing countries capable to meet energy-cooking demand. In this paper, a mathematical model of the heat transfer mechanisms involved with a plane mirror augmented box-type solar energy cooker has been presented in order to determine the thermal behaviour in the cooker based on the energy balance equations for the temperature elements. The cooker is constructed with a trapezium shape for maximising solar beam falling onto the absorber plate and equipped with a plane booster mirror reflector hinged at the top of the cooker for maximum concentration. The model is based on an analytical solution of the energy balance equations for different components of the cooker: such as glass cover, air inside, absorber plate, cooking vessel, cooking fluid. To validate the model, the temperature distribution obtained by a developed computer program is compared with experimental results measured for a typical day in Ghardaïa (32.39 °N, 3.78 °E) Algeria). For this purpose, the box solar cooker were designed, realized and tesyed by the authors at URAER? Ghardaïa. A data acquisition chain equipped with various measuring instruments was installed for the control of the system. The values of measured cooker’s temperatures through the AGILENT data acquisition unit were visualized numerically and graphically. The theoretical results are found to be in good agreement with the experimental results. The model was then employed to simulate the performance of the realized solar cooker, several temperature maps were obtained for summer and winter clear sky conditions at Algeria country showing areas in which the solar cooker can be operated effectively during the year. The sample results presented in this paper indicated the high potential of solar cooking in the study region depending on the amount of received solar radiation.Item Model Predictive Current Contro l of Shunt Active Power Filter C onnected to a Photovoltaic S ystem(University of Eloued جامعة الوادي, 2018-12-10) Bekhoucha, Nassima; Mesbahi, NadhirThis research work presents a predictive current control of shunt active power filter connected with PV system, the main goal of the proposed active filtering system is to eliminate the undesirable harmonics. Shunt active power filter need a supply of energy for recompensing this based mostly deformations, which use the electrical phenomenon array with DC-DC boost converter as a supply of DC power. Therefore, to improve the efficiency of the energy conversion it is a necessary track permanently the optimum point through an adequate tuning of a boost converter regardless the solar irradiance variations. However, predictive current control is applied to control a three-phase voltage source inverter used as a shunt Active power filter. This method chooses a switching state that minimizes the error between the output currents and their references. The proposed controller offers excellent reference tracking with less current harmonic distortion. Finally, the proposed system's performance is investigated using a MATLAB simulation model.Item Numerical study of the influence of nanofluids and the volume fraction of nanoparticles on thermal exchange in trapezoidal mini-channels(University of Eloued جامعة الوادي, 2018-12-10) Chadi, Kamel; Belghar, Nourredine; Messaoudi, Aissam; Guerira, belhi; Derfouf, SemecheddineDans le présent travail, nous avons étudié numériquement l’effet de trois différents types de nanoparticules et la fraction volumique des nanoparticules sur l’échange de chaleur dans des mini canaux trapézoïdaux d’un refroidisseur. Dans notre simulation numérique, nous avons comparé les résultats de la simulation pour les trois types de nanofluides (Cu-eau; Ag-eau; Diamond-eau). La fraction volumique comprises entre 0,02% et 0,1%. On choisis un refroidisseur à mini canaux en cuivre qui possède une bonne conductivité thermique (K= 400 W/mK). Le flux du composant électronique est égale à 200W. Les résultats numériques sont obtenus en choisissant un nombre de Reynolds égale à 1400 et en considérant le régime d’écoulement comme stationnaire. La simulation a été réalisée à l'aide du logiciel industriel ANSYS v15.0. Les résultats obtenus montrent que le coefficient de transfert de chaleur augmente avec l’augmentation de la fraction volumique des nanoparticules (Cu, Ag, Diamond). Le meilleur fluide de transfert de chaleur est le nanofluide qui contient les nanoparticles de Diamant.Item Propriétés Thermo-Physiques des Réfrigérants à Faible Impact Environnemental: Systèmes Binaires et Ternaire(University of Eloued جامعة الوادي, 2018-12-10) MAALEM, Youcef; FEDALI, Saida; MADANI, HakimL’optimisation des fluides frigorigènes nécessite la connaissance précise des propriétés d'équilibre sur une large gamme de température, de pression et de composition. L’objectif de ce travail est la détermination de la position de l’azéotrope de mélanges binaires, ainsi que l’étude de diagrammes de phase des mélanges ; R600a + R1234ze, R600a + R13I1, R1234ze + R13I1 et le mélange ternaire R600a + R1234ze + R13I1 par le biais d’un modèle thermodynamique constitué de l’équation d’état de Peng-Robinson associée la fonction alpha de Mathias-Copeman, la règle de mélange de Wong-Sandler avec le coefficient d’activité de NRTL. Les résultats obtenus ont été en très bons accord avec l’expérimental.Item 3D Finite element simulation of metal waste compaction process(University of Eloued جامعة الوادي, 2018-12-10) Bokhors, S.; Benhizia, A.; Outtas, T.This paper presents a numerical study of the dynamic compaction of random cylindrical metal waste assembly. The analysis of the process is based on a new method to place the waste randomly in the chamber, using the 3D collision detection function in SolidWorks that can highlight interferences and collisions. The material is considered to be elasto-plastic. A threedimensional study was carried out using the finite element method in an explicit dynamic analysis. The study offer useful information on the packing density variation within the loading applied. The results provide a better understanding of the dynamic compaction process.Item Natural Frequency Analysis of Rectangular Laminated Sandwichs Plates Using 2D Layerwise FE Model(University of Eloued جامعة الوادي, 2018-12-10) Belarbi, Mohamed-Ouejdi; Tati, Abdelouahab; Khechai, AbdelhakThe natural frequency analysis of rectangular laminated sandwichs plates has been investigated, using a new higher-order layerwise finite element formulation. A first-order displacement field is assumed for the face sheets, whereas a higher-order displacement field is assumed for the core. Unlike the conventional layerwise models, the number of variables in the present model is fixed and does not increase when increasing the number of lamina layers. This helps to reduce the computational cost of the analysis. The performance and reliability of the proposed formulation are demonstrated by comparing the author’s results with those obtained using the three-dimensional elasticity theory, analytical solutions and other advanced finite element models. From the obtained results, it was shown that the proposed finite element model provided a better prediction on the natural frequency a rectangular laminated sandwichs plates.Item Development of graded band gap intrinsic layers for Single-junction a-SiH solar cell(University of Eloued جامعة الوادي, 2018-12-10) Idda Ahmed; Ayat, Laila; Daoudi, Mebarka; Benslimane, Hassanethe influence of the absorber layer (i-layer) properties on the amorphous solar cells parameters has been an object of research since the 1980s. In this study, a numerical simulation was carried out to study the influence of the intrinsic layer by using a novel technique based on graded band gap for amorphous single junction solar cells. In this context, we use the software called AMPS-1D. The optimized properties of the different layers of a-Si:H solar cell, especially intrinsic layer, were suggested to obtain the maximum conversion efficiency. Indeed, the use of intrinsic multilayer can control the spectral overlap by employing band-gap grading which the potential initial conversion efficiency of single-junction solar cell reach to 11.52%.Item Microstructural evolution of Ag based braze and its effect on the tribological behavior using different brazing current .(University of Eloued جامعة الوادي, 2018-12-10) Cheniti, Billel; Badi, Rida; Yahmi, Youcef; Bouzid, Maamache; Balko, Jan; Hvizdos, Pavol; Miroud, DjamelIn this work, the WC-Co carbide/braze/1020 steel brazed joints have been prepared, using Tungsten Inert Gas (TIG) process. The effect of brazing current on the microstructure evolution of the Ag-Cu-Zn braze has been practically investigated. The results indicated that the braze contained three different phases: Cu solid solution, Ag solid solution and Ag-Cu-Zn eutectic phase, where their fractions depend on the brazing current applied. The interdiffusion reactions between the braze phases and their effect on the wear resistance were studied. Moreover, the mechanical properties especially the hardness (HIT) and Young’s modulus (EIT) of each phase were evaluated by nano-indetation measurements. The tribology test using linear mode revealed that, the wear mechanism becomes adhesive with the increase of brazing current.Item Convection forcée 3D dans un box contenant deux sources de chaleurs cylindriques(University of Eloued جامعة الوادي, 2018-12-10) BOURAS, Abdelwafi; BOUABDALLAH, Said; GHERNAOUT, Badia; GHAZEL, AbdelhamidDans ce travail, une simulation numérique de la convection forcée dans une cavité cubique contenant deux sources de chaleur cylindriques au milieu a été présentée. La cavité est soumise à un flux d’air entrant du côté gauche (centre) et un flux sortant du côté droit avec les mêmes dimensions des portes d’ouverture (0.1H). Les parois de la cavité sont maintenus adiabatiques. Les équations de conservation régissant l’écoulement de convection forcée sont résolues à l’aide de logiciel FLUENT. La comparaison des résultats numériques obtenus avec ceux disponible dans la littérature (numérique et expérimentale) a été faite, et montre un bon accord. L’effet de dimension de cavité (nombre de Rayleigh) et la vitesse de ventilation de l’air (Nombre de Reynolds) sont présentés et discutés. Les résultats obtenus montrent une forte dépendance entre les conditions géométriques et la structure du champ dynamique et thermique de l’écoulement de convection forcée.Item A comparison between a conventional and a convergent collector of a solar chimney power plant(University of Eloued جامعة الوادي, 2018-12-10) Ayadi, Ahmed; Nasraoui, Haythem; Bouabidi, Abdallah; Driss, Zied; Kchaou, Hedi; Abid, Mohamed SalahA numerical model is developed to assess the performance of a solar chimney power plant while varying the collector roof angle. A comparison between a convergent collector roof and a conventional setup of a solar chimney power plant is presented. A two-dimensional steady model has been developed using the commercial computational fluid dynamics (CFD) code "Ansys Fluent 17.0". For each collector roof configuration, the distribution of the magnitude velocity, the temperature, the pressure and the turbulent kinetic energy were presented and discussed. The obtained results present an interesting data which can provide the thermal characteristics of the air flow for the designers and the engineers to improve the overall efficiency of an existing solar setup.Item Perturb and Observation MPPT algorithm for the performance of Solar Photovoltaic System(University of Eloued جامعة الوادي, 2018-12-10) Ressa, Noureddine; Merabet, Leila; Omeiri, AmarThe Maximum Power Point Tracking is a technique used in power electronic circuit to improve the efficiency of photovoltaic systems . Several works and many papers have suggested different methods for extracting maximum power point. The aim of this work is to develop and realize the performance of the Photovoltaic system using Perturb and Observe algorithm. The first part of the work is devoted to the study of the components constituting the global photovoltaic system namely: the photovoltaic generator and the DC-DC converter. The PV generator is modelled by the mathematical equations and its current-voltage characteristics and the power-voltage characteristics are simulated taking in to account the temperature and sun's irradiance. The second part is detailed the MPPT method of Perturb and Observe using the DC-DC converters. The simulation results are designed in the MATLAB / SIMULINK environment where demonstrated the efficiency of the photovoltaic system when using Perturb and Observe MPPT algorithm.Item Identification des paramètres du fluage par la méthode iso contrainte étagée des thermoplastiques(University of Eloued جامعة الوادي, 2018-12-10) Belhi GUERIRA; Bouzaher, Mohamed taher; GUETTAF TEMAM, Taher; BELGHAR, NourredineLe comportement mécanique des matériaux est compris entre celui parfaitement élastique, et celui parfaitement visqueux, selon les conditions de service tel que la température, l’environnement (humidité) et le niveau de sollicitation qui doivent être pris en considération pour prédire ce comportement soit donc la durée de vie des structures. Le caractère visqueux des matériaux devient important et les solides acquièrent par conséquent un comportement viscoélastique, vu que les solides thermoplastiques ont des températures de fusion relativement basses relativement à leur température d’utilisation, ils ont un comportement important qui peut se manifesté dans la réponse du matériau pour une sollicitation statique ou autre. Notre étude porte sur le fluage, celui-ci n’est qu’un essai statique qui consiste à suivre l’évolution de la déformation en fonction du temps d’un matériau sous un chargement constant, il permet l’exploration du comportement à très long terme. Le mode de sollicitation considéré est la flexion à trois points qui donne lieu un champ de contrainte non uniforme dans le matériau, le matériau traité est le polyamide 6 de marque TECALID6 renforcé par des fibres de verre.Item Improved Perturb & Observe Method by Particle Swarm Optimization Algorithm for Photovoltaic System(University of Eloued جامعة الوادي, 2018-12-10) Bechouat, Mohcene; Feraga, Chams-Eddine; Attia, Mohammed El hadi; Sedraoui, MoussaThe Perturb and Observe (P&O) maximum power point tracking (MPPT) algorithm can be not robust where the rapid change in atmospheric conditions, especially it happened in irradiance, caused by the heuristic choice for the duty cycle perturbation and the duty cycle initialization. In this paper, it is shown how to integrate optimization method called Particle Swarm optimization (PSO) in P&O to choice the duty cycle perturbation and the first initialization condition based in maximizing power output. Using a DC-DC converter “Boost” associated with the photovoltaic panel; so working to get the maximum power that is mean, earn a good yield. The results of the simulation performed under the tool Simulink/Matlab shows the effectiveness of the integration PSO optimization method in P&O.Item Industrials Pollutants Photocatalytic Process by Hybrid by Fe Innovant Natural Material Rich in Silica With Thermal Calcination(University of Eloued جامعة الوادي, 2018-12-10) REZIG, Walid; HADJEL, MohammedFerrihydrite silicide is widely used to realize contact terminals of integrated circuits and is usually formed by ex-situ heating treatments in-situ reactions during sputter deposition of a ferrihydrite with SiO2 of diatomite have been investigated in this work, by means of x-ray diffraction , x-ray fluorescence , infrared spectroscopy, , scanning electron microscopy. Diatomite which will be modified by iron “ the deposit of ferrihydrite on raw diatomite by FeCl2, and NaOH. Comparison of XRD results proves that raw diatomite has an irregular structure but it becomes more regular at ferrihydrite modified to obtain ferric oxides differents phases from cristallinities are: ferrihydrite , maghemite, magnetite, akaganeite,hematite, goethite, and schwertmannite. Kinetics photodegradation ( photocatalytic degradation) depend a pH solution Vat Green 03 textile dye. It is more important with low pH (pH= 4).Ferrihydrite modified diatomite ( DMF1) offer a great potentials for dyes eliminations and their wastewatersItem Thermal Performance Analysis of Biskra’s Earth-to-Air Heat Exchanger (EAHE)(University of Eloued جامعة الوادي, 2018-12-10) MEHDID, Charaf-eddine; Benchabane, Adel; MOUMMI, Noureddine; SELLAM, Sadam Houcine; MOUMMI, Abdelhafid; MELHEGUEG, Mohammed Amin; ROUAG, AmarThis paper deals with the experimental effect of air mass flow and operating time on the thermal performance of horizontal earth-to-air heat exchanger (EAHE). The set up is installed in Biskra region (34°47’N - 005°43’E) characterized by semi-arid and hot climate. The results showed that the first twenty meters, the quantity of heat transferred is about seventy percent (70%) of the total heat exchange. Moreover, the energy efficiency and performance coefficient decreased by 30 % and 43% respectively when the air mass flow ranged between 0.038 and 0.054 kg/s. Likewise, a reduction of 22% in efficiency for six hours of continuous functioning for air mass flow equal to 0.038 kg/s.