Journal of Renewable Energies Journal of renewable energies en-US <div id="deed-conditions" class="row"> <ul class="license-properties col-md-offset-2 col-md-8" dir="ltr"> <li class="license by"> <p><strong>Attribution</strong> — You must give <a id="appropriate_credit_popup" class="helpLink" tabindex="0" title="" href="" data-original-title="">appropriate credit</a>, provide a link to the license, and <a id="indicate_changes_popup" class="helpLink" tabindex="0" title="" href="" data-original-title="">indicate if changes were made</a>. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.<span id="by-more-container"></span></p> </li> <li class="license sa"> <p><strong>ShareAlike</strong> — If you remix, transform, or build upon the material, you must distribute your contributions under the <a id="same_license_popup" class="helpLink" tabindex="0" title="" href="" data-original-title="">same license</a> as the original.<span id="sa-more-container"></span></p> </li> </ul> </div> <div class="row"> <ul id="deed-conditions-no-icons" class="col-md-offset-2 col-md-8"> <li class="license"><strong>No additional restrictions</strong> — You may not apply legal terms or <a id="technological_measures_popup" class="helpLink" tabindex="0" title="" href="" data-original-title="">technological measures</a> that legally restrict others from doing anything the license permits.</li> </ul> </div> (Abderrahmane HAMIDAT) (Mohamed DEBBACHE) Thu, 31 Dec 2020 00:00:00 +0000 OJS 60 Perturb and observe maximum power point tracking method for photovoltaic systems using duty-cycle modulation <p align="justify">This paper presents the implementation of perturb and observe maximum power point tracking algorithm with Duty Cycle Modulation instead of pulse width modulator for photovoltaic power generators. Like all the different methods used for tracking the maximum power point of photovoltaic system, perturb and observe method use a Pulse Width Modulation to control the DC-DC converter. Here, the Duty Cycle Modulation is used in the place of Pulse Width Modulation. A detailed analysis of the approach is proposed and simulations are performed using MATLAB/Simulink software. The results show the performance and speed at which this control reaches the maximum power point. The response times is very low and is between 0.0125s and 0.05s depending on the climatic variations. So, Duty Cycle Modulation can be used as an alternative to Pulse Width Modulation for the search of the maximum power point.</p> Theodore Louossi, Noël Djongyang, Olivier Thierry Sosso Mayi, Arnaud Nanfak Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Assessment of Grid Connected PEM Fuel Cell Power System using Matlab/Simulink Stateflow models <p align="justify">This paper addresses the development of three-phase grid connected fuel cell energy system using Matlab/Simulink Stateflow environment. The proposed grid connected fuel energy system designed by considering a 5.5kW proton exchange membrane fuel cell connected to the grid via a double stage including a DC-DC boost converter and three phase inverter. The whole energy system has been implemented using Matlab/Simulink Stateflow environment where all the parameters and operating conditions have been considered. The proposed energy system has been tested and validated using Matlab/Simulink under different test scenario representing different operating conditions. Simulation obtained results prove the efficiency of the developed stateflow models to characterize and analyzing the PEM fuel cell power system as well as the connection to the grid. The developed models can be used as a platform to analyze the performance of the system in connected or unconnected cases.</p> Hamza Bahri, Abdelghani Harrag Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 End of life silicon based photovoltaic panels: A review <p align="justify">Solar energy is a clean renewable energy source. During the electricity production, photovoltaic systems do not generate any waste or toxic emissions. However, if this industry is to truly present a sustainable solution it must account for the photovoltaic solar panels’ end-of-life phase. According to the already installed PV panels and its predicted growth, the amount of waste PV panel is estimated to reach in 2050, 78 million tons. Different researches showed the necessity to recover the photovoltaic waste panels and according to the last issue guideline of the European Union (2012/19/EU), the end of life photovoltaic panels are considered as electronic and electric equipment waste. In this review paper, different recent researches interest of recycling photovoltaic panels will be cited. The several components, which constitute silicon based photovoltaic panels, will be presented. These silicon based photovoltaic panels presented are realizing in researcher center of technology of semiconductor for energetic (CRTSE, Algeria). The materials present in the panels can be recovered and reused using specific methods; once their modules reach the end of their life cycle such as: glass and aluminum, as well as semiconductor materials such as silicon, copper. Finally, we will cite 53 different recycling panels industries.</p> Sabiha Anas Boussaa , Abdelhak Benkrid, Naima Zaourar Boutarek, Messaouda Ayachi Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Modélisation de l’onduleur photovoltaïque connecté au réseau électrique <p align="justify">Ce travail présente un modèle mathématique d'onduleur pour les applications photovoltaïques connectées au réseau pendant le fonctionnement du système PV. L'étude a été réalisée pour les trois onduleurs du système photovoltaïque du Centre de Développement des Energies Renouvelables (CDER, Bouzaréah). Dans cette étude, le modèle d'onduleur Sandia (Sandia National Laboratories) a été utilisé. Un modèle simplifié est proposé. Il calcule la puissance de sortie AC de l'onduleur en fonction de sa puissance d'entrée DC</p> Amar Hadj Arab, Bilal Taghezouit, Kamel Abdeladim, Smail Semaoui, Saliha Boulahchiche, Abdelhak Razagui , Akila Gherbi, Saida Bouacha, Saida Makhlouli, Salima Nemsi, Abdelhak Djoudi Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Etude de performance des modèles large bande pour des conditions de ciel clair: cas de sud de l'Algérie <p align="justify">Le rayonnement solaire global horizontal (GHI) est l’une des principales variables utilisées pour la gestion des installations solaires ; la connaissance de sa répartition géographique et de sa variation temporelle est d'une importance primordiale pour de nombreuses applications. Le cas du GHIcs pour un ciel clair est utilisé comme fonction de normalisation dans de nombreuses prévisions de production solaire. Afin de contourner le manque de mesures au sol, diverses techniques de modélisation peuvent être appliquées pour estimer la composante globale (GHICS). Dans ce travail, cinq modèles ont été testés pour estimer le GHIcs horaire : Yang, Solis, Bird-Hulstrom, ESRA et McClear. Ainsi, un classement de ces modèles est proposé sur la base des indicateurs de performances Les résultats ont montré que les modèles de Bird-Hulstrom, McClear, présentent les performances.</p> Said Benkaciali, G. Notton, C. Voyant, K. Gairaa Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Analyse d’un écoulement monophasique turbulent en présence d’un mélangeur statique de type Kenics <p align="justify">L’acquisition de la perte de charge monophasique en utilisant un manomètre à tube à travers un mélangeur statique de type Kenics dans une conduite horizontale a été faite pour un Reynolds appartenant à l’intervalle [8116-18938]. L’approche considérant le mélangeur statique comme un milieu poreux structuré est appliquée sur le Kenics. Les paramètres intrinsèques du Kenics ont été calculés, et l’accord entre les pertes de charges théoriques et expérimentales confirme que l’approche est applicable sur le Kenics. Le taux de l’énergie dissipée et les constantes de temps caractéristiques du mélange ont été estimés en utilisant les pertes de charges recueillies. Des corrélations ont été proposées pour la perte de charge et le taux de l’énergie dissipée. Les constantes de temps caractéristiques ont été étudiées et le processus du mesomixing par dispersion turbulente a été identifié comme le processus gouvernant l’opération de mélangeage le long de tout l’intervalle de Reynolds.</p> Hosni Massinissa , Hammoudi Mhamed Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Analyse comparative des ressources solaires de sites de centrales solaires thermodynamiques <p align="justify">Le présent article est une contribution à l’élaboration d'une méthodologie d'évaluation de sites pouvant accueillir une centrale électrique solaire thermique à concentration (CSP). En particulier l'évaluation des ressources solaires de plusieurs sites potentiels est étudiée avec attention. L'irradiation solaire normale directe (DNI), nécessaire au dimensionnement des centrales CSP, est estimée à partir d'outils issus des mesures du rayonnement au sol ainsi que des estimations provenant de données satellites. Enfin, la méthodologie est appliquée sur un cas d'étude (dans le contexte Algérien) où il est aussi question d'évaluer des outils du rayonnement solaire pouvant être utilisés dans le cadre de cette méthodologie.</p> Hichem Farsi Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Direct Torque Control of Two Series Connected Six-Three phases Motor Fed by Single Six Phases VSI Based on Optimum Vectors Selection <p align="justify">In this paper, a direct torque control (DTC) is developed for a two series connected six-phase &amp; three-phase motor drive (IMs) with sinusoidal distributed windings and fed by single six-phase voltage source inverter (VSI). Direct torque control also considered as a variable structure control strategy with simplicity, fast response and tolerance to motor parameter variations; it provides direct control of stator flux and torque by optimally selecting the inverter states in each sampling period. In case of multi-phase system drive, the increased number of voltages vectors offers greater flexibility in optimizing the selection of the inverter states. The technique elaborated in this work based direct torque control allows independently control of the system fed by single inverter. The effectiveness and capability of the proposed method are shown by computer simulation.</p> Chedni Yahia, Boudana Djamel, Nezli lazhari Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000 Techno-economic assessment of wind energy conversion systems for power generation for the city of N'Djamena in Chad <p align="justify">Around the world, with a significant increase in installed capacity each year, wind power is one of the most profitable forms of renewable energy. In this study, three commercial wind turbines, namely Bonus 300kW/33, Bonus 1MW/54 and Vestas 2MW/80, were selected as large-scale wind power conversion systems (WECS) for the technical evaluation of production electricity for the N'Djamena site in Chad. The economic evaluations of these three WECS for power generation are calculated using the Cost Calculation Technique (PVC). Thus, the results obtained show that the highest capacity factor is 15.29% with Bonus 1MW/54 while the lowest at 11.39% with Bonus 300kW/33. The minimum average cost per kWh is 23 US$ / kWh with the 1 MW/54 Bonus, while the highest cost is 33.8 US$ / kWh with a Bonus of 300 kW / 33.</p> Marcel Hamda Soulouknga, Dumitru-Dorin Lucache , Serge Yamigno Doka, Timoleon Crepin Kofane Copyright (c) 2020 Journal of Renewable Energies Thu, 31 Dec 2020 00:00:00 +0000