Journal Articles

Permanent URI for this collectionhttps://dspace.univ-soukahras.dz/handle/123456789/229

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Analysis and Characterization of PEMFC Power Systems with Bond Graph
(2013-11) Nedjem Eddine Benchouia; Elias Hadjadj Aoual; Lakhdar Khochemane; Bouziane.Mahmah
This paper addresses the problem of bond graph methodology as a graphical approach for modeling fuel cell systems. The system consists of a Proton Exchange Membrane Fuel Cell (PEMFC) stack and an interleaved boost converter. Simulation results illustrate the simplified system response obtained using the implementation of the governing equations in MATLAB/Simulink or a bond graph
Bond graph modeling approach development for fuel cell PEMFC systems
(www.elsevier.com/locate/he, 2014-09-14) Nedjem Eddine Benchouia; Elias Hadjadj Aoul; Lakhdar Khochemane; Bouziane Mahmah
This paper addresses the problem of bond graph methodology as a graphical approach for modeling fuel cell systems. The system consists of a Proton Exchange Membrane Fuel Cell (PEMFC) stack, an interleaved boost converter, battery pack connected via a buck converter. Simulation results illustrate the simplified system response obtained using implementation of the governing equations in MATLAB/Simulink and is compared with a bond graph implementation in the simulation program 20-sim.
Determination of the predictive Reliability for PEMFC system
(IPCO, 2015) Nedjem Eddine Benchouia; Lakhdar Khochemane; Belgacem Madi
Today reliability is one of the serious requirements of fuel cell systems, and their associated cost in all applications, in general, and automotive applications, in particular when the power requirement is scaled up, is still unclear. Therefore, increasing cell lifetimes and membrane electrode assembly (MEA) durability is the technical advance that may be expected so that we can have a remarkable tendency of decreasing fuel cell costs with a significant increase in global systems safety, that best meet customer requirements. Our contribution, in this paper, focuses on the simulation method of the “Monte Carlo” over the entire reliability calculation for the PEMFC system, with the integration of the most critical elements of them and the proposition of the contrivances for their modifications, in the objective to predict the lifetime and failure rate of a system by reliability calculations: a problem formulation is given, reliability calculations of PEMFC are defined and a reliability estimation methodology is developed. We did obtain, however, some results that can help us in the prediction reliability way at the design
An adaptive fuzzy logic controller (AFLC) for PEMFC fuel cell
(www.elsevier.com/locate/he, 2015) Nedjem-Eddine Benchouia; Abdallah Derghal; Bouziane Mahmah; Belgacem Madi; Lakhdar Khochemane; Elias Hadjadj Aoul
Among the various fuel cell technologies available for use in vehicular systems, the Proton Exchange Membrane Fuel Cell (PEMFC) has drawn the most attention due to its simplicity, viability, higher power density, and operation at lower temperatures. Due to these features, PEMFC is considered to be the most suitable technology for vehicular systems, industry, and other applications. As fuel cells are likely to be used in many future applications, great efforts have recently been made for their comprehension and design. This paper focuses on a 1.2WPEM fuel cell unit and develops the models of stack voltage and stack power. While the PEM fuel cell is a nonlinear process, it is very suitable to use fuzzy control to solve the control issue of the fuel cell. The stack output power can be controlled to a given value by using a variable universe fuzzy controller by controlling the input gas flow rate. In this paper, an FLC controller has been designed to control the voltage in the presence of fluctuations. The results of the implementation of this designed FLC controller on a dynamic electrochemical model of a small size 1.2 W, PEM fuel cell have been simulated by MATLAB Simulink and compared with a traditional PID controller. Simulation results show that good control effects can be achieved by using the adaptive fuzzy control system.
Synthesis of a control law for stabilization nonlinear systems: results and discussions
(IPCO, 2015) Nedjem Eddine Benchouia; Belgacem Madi; HichamTebbikh; Mounir Benadja
Dans ce papier, nous avons étudié le problème de stabilisation des systèmes non linéaires de la forme x= F(x)+Bu au voisinage d'une position d'équilibre de F(x). La stratégie consiste en l'application de la théorie des variétés centrales, permettant de passer d'un système complexe à un système simple, de dimension réduit, facile à étudier. Des exemples illustratifs ont été discutés et valider numériquement afin de synthétiser une loi de commande stabilisatrice pour tels systèmes.
Experimental study of the static behaviour of the PEM fuel cell
(IPCO, 2017) Nedjem Eddine Benchouia; Bouziane Mahmah
This work proposes and justifies an easy electric model of a power generation system based on a PEM fuel cell, the H-Tec PEM Power Module of 1.2W. This model has been developed by means of experimental data obtained in our laboratory.
Fuel Cells and Hydrogen Storage: Challenges Facing Vehicle Manufacturers
(IPCO, 2017)
The main challenge of our time is to find renewable energy sources that meet the needs of society. Nevertheless, energy must meet several criteria such as abundance, ease, and speed of use, but also the cost of production which must be low. In addition, the aspect of "clean and renewable energy" is also to be taken seriously. Today, fuel cells are a magnet for researchers because they have many advantages. First of all, these batteries have the capacity to produce a significant amount of electricity, water, and heat. In addition, the reagents of the battery are the oxygen naturally present in the atmosphere and the di-hydrogen that needs to be produced. Its production is therefore a major stake for the installation of the fuel cell. Many hopes rest on the fuel cell. As we have seen, it is one of the energy sources that have the most to become and application area. With a relatively high efficiency, and zero pollutant emissions, this fuel cell has many other advantages such as the variety of batteries that can be adapted to all current needs such as transportation, global electricity generation, or digital. Because of the benefits that flow from its use as an automobile fuel, hydrogen is expected to take precedence over other synthetic fuels in the not-too-distant future.
Reliability analysis of irregular zones in pipelines under both effects of corrosion and residual stress
(Elsevier, 2019-04-01) Nahal Mourad; Chateauneuf Alaa; Sahraoui Yacine
DEVELOPMENT AND APPLICATION OF A DECISION MAKING TOOL FOR FAULT DIAGNOSIS OF TURBOCOMPRESSOR BASED ON BAYESIAN NETWORK AND FAULT TREE
(Production Engineering Committee of the Polish Academy of Sciences, Polish Association for Production Management, 2019-06-28) Lakehal Abdelaziz; Nahal Mourad; Harouz Riadh
Reactive energy compensator STATCOM effect on reliability of a complex electrical system using Bayesian networks
(Eksploatacja i Niezawodnosc–Maintenance and Reliability, 2020) Sahraoui Yacine; Reffas Omar; Nahal Mourad
One day ahead prediction of PV power production: case study of Oued-Elkebrit’s station (Algeria)
(2020) Nedjem Eddine Benchouia; Mohammed Saaidia; Talal Belhouchat; Kaltoum Achibi
The research work presented hereafter is based on a real recorded database of a PV plant in production and in connection with a classical electrical grid. Datasets were processed through two types of techniques. The first one, a classical type, is based on a predictive predefined model, however, the second one is an artificial intelligent method based on neural networks. Based on the carried out experiences, we proposed a new strategy to implement the proposed techniques. The results obtained through the two methods were compared which demonstrate the superiority of the AI method in terms of precision, generalization, and robustness. Obtained results for each method were recorded, analyzed, and compared.
HVDC electricity transportation technology: feasibility study (Algeria)
(2020) Nedjem Eddine Benchouia; Mohammed Saaidia; Lekhmissi Derardjia
HVDC technology is gradually becoming a standard in electrical energy transportation. Even more, in some situations, it’s the best practical solution. The research work presented hereafter is dedicated to the exploration of the basic notions, the induced gains, the basic components, the basic and extended structures, the applications, and the real implemented projects of such technology. An overview of the research works concerned with the challenges of this expandable technology and an economic study of the deployment of real electrical transportation lines and their feasibility in Algeria are presented.
MODELING THE DEGRADATION OF VISCOSITY OF ENGINE OILS
(ICIC Express Letters, 2020-01) Nedjem Eddine Benchouia; Lamia Benzaid; Azzeddine Bouzaouit
In this paper, we present an analytical study to describe the monitoring and change in the condition of viscosity of lubricating oil used in combustion engines and exploited under very severe conditions. The objective is to determine the remaining lifetime of this oil. Stochastic methods in general are statistical methods that can be employed in predictive analysis, and they highly depend on probability theory. Markov models, in particular, make it possible to predict the degradation of the oil viscosity after a determined operating time. In these, degradation can be described by transition probabilities from one state to another. Knowing that Markov models are used to describe the transition probability to a new state (i) at time (t) based directly on the probability of the previous state (j) at time (t–1). In this context, we propose a Markov model to study the degradation law for the SAE 40 oil. The latter is designed for the lubrication of locomotives engines under the working conditions of a steel plant in Algeria. We have demonstrated that the proposed model gives detailed results describing the different conditions/states of the analyzed oil.
The effect of welded joint repair on a corroded pipeline reliability subjected to the hardness spatial variability and soil aggressiveness
(Elsevier, 2020-12-01) Sahraoui Yacine; Benamira Mohamed; Nahal Mourad
DRY SLIDING FRICTION AND WEAR OF THE WC/TIC-CO IN CONTACT WITH AL2O3 FOR TWO SLIDING SPEEDS
(2020-12-11) Riad HAROUZ, Abdelaziz LAKEHAL, Khaled KHELIL, Olivier Dedry, Neda Hashemi and Said Boudebane
OPTIMIZATION AND RELIABILITY OF THE POWER SUPPLY SYSTEMS OF A COMPRESSOR STATION
(2021) Nedjem Eddine Benchouia; Mohamed Saaidia
As gas pipeline systems become larger and more complex, the importance of optimally operating and planning these facilities has increased. The capital costs and operating expenses of pipeline systems are so large that even small improvements in the use of the system can involve large sums of money. Purpose. This article proposes a method to improve the reliability and optimization of power supply systems for compressor stations. The novelty of the proposed work is the development of a new mathematical model that allows the choice of the most appropriate maintenance policies in the best way to significantly reduce costs as well as to optimize useful key performance indicators – failure rate, the average time between breakdowns, the average repair time for equipment in compressor station electrical supply systems. Applying graph theory to represent this mathematical model from the schematic diagram of the different energy sources with respect to the five compressor stations is adequate. Methods. The problem that arises for the future operator or operator is, among others, how to balance two main aspects: a technical aspect and an economic aspect. The proposed methodology introduces a research algorithm to calculate the optimal values of the operating parameters of the power supply systems of compressor stations by combining technical and economic aspects in order to reduce costs and increase performance indicators. The proposed algorithm can be implemented in FORTRAN code. Results. The algorithm developed is an efficient tool for calculating maintenance costs and allows means of programming to define the most appropriate maintenance policy. On the other hand, this technique could be used as an essential economic evaluation indicator for other equipment in order to choose among all the technically possible solutions the one which allows obtaining the best economic result. Practical value. The proposed algorithm has been examined in this third variant of the supply system with two turbogenerators. The result of the optimization shows a clear preference for selecting station C for the pipeline as this presents the minimum cost which is the definition of the algorithm optimizer. Then, it is important to adopt the most recommended maintenance policies and practices in order to ensure the availability of the power supply systems and to avoid unplanned outages with the resulting loss of production.
VEHICLE EMBEDDED BY A FUEL CELL SYSTEM: A REVIEW
(2021) Nedjem Eddine Benchouia; Bilal SOLTANI
Among the various existing fuel cell, proton exchange membrane (PEM) fuel cells now seem to be the best suited to serve as a basis for the motorization of electric vehicles. This is explained in particular by their low operating temperature (about 70 ° C) and the solid nature of the electrolyte involved. In an emerging context of the electromechanical system aspect involving the modeling and simulation of a set of components, the present work consists in developing a model of the system for modeling and optimization of an on-board vehicle by fuel cell system. In this model, we will model the different parts of the system; PEMFC fuel cell, super-capacitor, converters, and a permanent magnet synchronous motor. Validation by simulation is essential for its good analysis and comparison with experimental measurements. Finally, this work focuses on solving the problems of optimization to adapt it to the fuel cell system.
A finite element model for estimating time-dependent reliability of a corroded pipeline elbow
(Emerald, 2021-04-13) Nahal Mourad; Khelif Rabia
Numerical study for reliability assessment of a corroding pipe to flange weld joint over its lifetime
(Faculty of Engineering/Faculty of Civil Engineering, University of Rijeka, 2021-09-27) Nahal Mourad; Lakehal Abdelaziz; Khelif Rabia
VEHICLE EMBEDDED BY A FUEL CELL SYSTEM: A REVIEW
(2022-02-08) Bilal SOLTANI and Nedjem-Eddine BENCHOUIA