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var str = 'Effet d’un dissipateur de chaleur sur le refroidissement des composants électroniques';
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]]>
Ailette]]>
Dissipateur de chaleur]]>
Simulation]]>
Dans cet article, l’influence du nombre et la hauteur des ailettes d’un dissipateur de chaleur sur le transfert thermique par convection mixte dans une cavité renfermant des composants électroniques a été simulé numériquement. Le nombre d’ailettes dans le dissipateur de chaleur varie entre 4 et 10. La hauteur des ailettes est prise de 0.01 m jusqu’à 0.035 m. Comme composant électronique, on a considéré un microprocesseur d’une puissance de 20 W et placé en dessous du dissipateur de chaleur avec l’hypothèse que les autres composants sont adiabatiques. Le fluide étudié est soufflé et pulsé dans la cavité par un ventilateur. Le nombre de Prandtl est supposé constant et égal à 0.71. La simulation en question, a été menée en exploitant un logiciel sous environnement IAO avec un solveur en éléments finis. Les résultats dégagés suite à cette simulation montrent que, l’augmentation du nombre et la hauteur des chicanes améliore la quantité de chaleur dégagée par le dissipateur.]]>
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var str = 'Belmiloud, Mohamed Amine';
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]]>
Journal of Renewable Energies; Vol. 21 No. 4 (2018): Volume 21 (Regular); 529 - 536]]>
Journal of Renewable Energies; Vol. 21 No 4 (2018): Volume 21 (Regular); 529 - 536]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i4]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/711/1158]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/711]]>
10.54966/jreen.v21i4.711]]>
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var str = 'A six-phase series-connected two-motor drive with decoupled dynamic control supplied by a three-level six-phase inverter';
document.write(linkifyHtml(str, options));
]]>
Multiphase machines]]>
Six-phase]]>
Vector control]]>
ree-level six-phase inverter]]>
This paper presents independent vector control of six-phase two-motor drive machine series-connected fed by a three-level six-phase inverter. Via appropriate phase transposition during the series connection of the stator windings, the fully decoupled control of the two machines is possible. The control system multi machines classic based on vector control with conventional inverters comprise various problems are related to low power quality, pressure on motor bearing, etc. However, decoupling control of a series- six-phase two-motor drive machine by a three-level six-phase inverter is developed. A simulations results clearly shows the possibility of independent vector control of the two machines, although a single three-level six-phase inverter is used as the supply.]]>
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var str = 'Bessaad, Taieb';
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]]>
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var str = 'Taleb, Rachid';
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]]>
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var str = 'Chabni, Fayçal';
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]]>
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var str = 'Belboula, Abdelkader';
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]]>
Journal of Renewable Energies; Vol. 21 No. 4 (2018): Volume 21 (Regular); 521 - 528]]>
Journal of Renewable Energies; Vol. 21 No 4 (2018): Volume 21 (Regular); 521 - 528]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i4]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/710/1157]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/710]]>
10.54966/jreen.v21i4.710]]>
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var str = 'Les cellules solaires à base de matériaux pérovskites - Structures et performances';
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]]>
Cellules Photovoltaïques]]>
Pérovskites]]>
Architecture]]>
Graphène]]>
Dopage]]>
Dans cet article, nous présentons la nouvelle génération de cellules photovoltaïques à base de matériaux pérovskite. Différents paramètres influent sur les performances des cellules tels que l’architecture, le type du matériau utilisé pour la couche active, les techniques d’élaboration et de préparation des différentes couches. Le précurseur utilisé dans la préparation de la couche de transport d’électrons dioxyde de titane TiO2 influent sur le rendement des cellules. L’utilisation de l’oxyde de graphène comme couche de transport de trous améliore le rendement et la stabilité des cellules, de nouvelles architectures d’électrode sont proposées. Le travail de sortie du graphène GR peut être contrôlé par variation de la concentration d’un dopant chimique, tel que le tri-chlorure d’or, AuCl3 et le bore. Un rendement de 15.77 % est obtenu en dopant le graphène par 10 mM de AuCl3. Cette couche dopée est utilisée comme couche protectrice, elle permet d’améliorer l’efficacité de conversion et la stabilité des cellules. Le dopage de la couche pérovskite avec le bromure de cuivre améliore aussi le rendement des cellules.]]>
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var str = 'Ourahmoun, Ourida';
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]]>
Journal of Renewable Energies; Vol. 21 No. 4 (2018): Volume 21 (Regular); 515 - 520]]>
Journal of Renewable Energies; Vol. 21 No 4 (2018): Volume 21 (Regular); 515 - 520]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i4]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/709/1156]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/709]]>
10.54966/jreen.v21i4.709]]>
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var str = 'Méthode de réduction pour le calcul des paramètres de l’équation caractéristique d’un module photovoltaïque';
document.write(linkifyHtml(str, options));
]]>
Module PV]]>
Estimation]]>
Prévision]]>
Méthode de réducteur]]>
ramètres du module]]>
Equation caractéristique]]>
Il est nécessaire de fournir des outils efficaces pour l'estimation et la prévision de l'énergie électrique produite par les modules photovoltaïques. Le modèle à une diode est le plus utilisé actuellement pour décrire le comportement électrique d'un module photovoltaïque. Dans ce travail, nous proposons une méthode de réduction pour le calcul des paramètres du modèle en utilisant les données fournies par le fabricant. La méthode permet de résoudre un système de deux équations au lieu du système plus important à cinq équations et cinq inconnus. Pour un module qui a déjà fonctionné durant quelques années, les paramètres calculés du modèle ne sont pas fiables. Il est nécessaire de les recalculer selon l'état actuel du module. Nous avons développé une méthode de réduction permettant de le faire. La méthode a donné de bons résultats avec un temps de calcul relativement correct.]]>
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var str = 'M’Raoui, Abdelhamid';
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]]>
Journal of Renewable Energies; Vol. 21 No. 4 (2018): Volume 21 (Regular); 505 - 514]]>
Journal of Renewable Energies; Vol. 21 No 4 (2018): Volume 21 (Regular); 505 - 514]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i4]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/708/1155]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/708]]>
10.54966/jreen.v21i4.708]]>
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var str = 'Etude numérique de la convection thermique dans un milieu poreux';
document.write(linkifyHtml(str, options));
]]>
Milieu poreux]]>
Convection naturelle]]>
Cavité cubique]]>
Méthode des volumes finis]]>
Ce travail porte sur une simulation numérique de la convection naturelle stationnaire, dans une enceinte de forme cubique. L’enceinte est partiellement poreuse homogène et isotrope. Les parois horizontales de l’enceinte sont adiabatiques imperméables. Les parois verticales de la cavité sont soumises à des températures constantes (des conditions aux limites de type Dirichlet), et le fluide est de l’air. L’écoulement dans le milieu poreux est modélisé par le modèle de Darcy-Brinkman-Forchheimer. La méthode numérique des volumes finis est utilisée pour la résolution des équations de continuité, de quantité de mouvement, et de l’énergie. Les résultats obtenues ont permis d’étudier l’influence des nombres de Rayleigh, de Darcy, et l’épaisseur adimensionnelle de la couche poreuse sur le transfert thermique. Les résultats obtenus indiquent que l’augmentation de Nu est proportionnelle à l’augmentation des nombres de Rayleigh et de Darcy et inversement proportionnelle à l’épaisseur adimensionnelle de la couche poreuse.]]>
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var str = 'Ouarhlent, Fouzia';
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]]>
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var str = 'Soudani, Azeddine';
document.write(linkifyHtml(str, options));
]]>
Journal of Renewable Energies; Vol. 21 No. 4 (2018): Volume 21 (Regular); 495 - 504]]>
Journal of Renewable Energies; Vol. 21 No 4 (2018): Volume 21 (Regular); 495 - 504]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i4]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/707/1154]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/707]]>
10.54966/jreen.v21i4.707]]>
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var str = 'A novel single sensor PV MPPT controller';
document.write(linkifyHtml(str, options));
]]>
PV system]]>
MPPT]]>
DC-DC]]>
Step size]]>
Single sensor]]>
This paper proposes a novel single sensor maximum power point tracking method for PV system composed of Solarex MSX-60W PV panel operating at variable atmospheric conditions and DC-DC boost converter controlled using the proposed MPPT that uses only one sensor in order to reduce the cost and the complexity of the MPPT controller. The performance of the proposed single sensor MPPT controller is evaluated using the implemented Matlab/Simulink PV power system model. Simulation results show that the proposed single sensor MPPT controller can provide similar results using only one sensor compared to the conventional two sensors MPPT.]]>
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var str = 'Harrag, Abdelghani';
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]]>
var options = {
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var str = 'Daili, Yacine';
document.write(linkifyHtml(str, options));
]]>
Journal of Renewable Energies; Vol. 21 No. 3 (2018): Volume 21 (Regular); 487- 493]]>
Journal of Renewable Energies; Vol. 21 No 3 (2018): Volume 21 (Regular); 487- 493]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i3]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/706/1153]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/706]]>
10.54966/jreen.v21i3.706]]>
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var str = 'Indigenous kaolinite ore as cost effective adsorbent for re-refining of used lubricating oil';
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]]>
Re-refining]]>
Waste lube oil]]>
Used lube oil]]>
Adsorption]]>
Indigenous kaolinite]]>
Present study evaluates efficiency of indigenous kaolinite ore as environment friendly and low cost adsorbent for re-refining of used lubricating oil. Thermo gravimetric analysis was used to find the mass variation with rise in temperature. Different characterizing techniques such as XRD, SEM and EDS were used to see the physical and chemical changes, composition and available volume of pores before and after activation. Indigenous kaolinite ore was activated at 600 °C for one hour to increase pore size to surface area ratio. Adsorption was carried out by passing exhausted lube oil with commercial grade n-hexane in a fixed 1:2 v/v ratio over the surface of activated kaolinite in a glass column with length to diameter ratio of 16:1. The improvement in the quality of lube oil was determined by comparing quality parameters of used and refined lube oil. The process gave 95 % yield of good quality transparent pale-yellow oil having colour index of 2 with 99 % of metal reduction. Maximum capability of kaolinite ore to adsorbed oil was found to be 160 g of refined oil/200 g of kaolinite. Used adsorbent was regenerated and utilized again for the adsorption of more oil. Regenerated ore provided 150 g refined oil/200 g Kaolinite. The solvent was recovered through rotary evaporator under vacuum. Recovery of solvent and adsorbent regeneration suggest that proposed method for purification of lube oil is environment friendly and cost effective.]]>
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var str = 'Qayoom, Amtul';
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]]>
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var str = 'Talha, Muhammad';
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]]>
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var str = 'Kamal, Ashraf';
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]]>
var options = {
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var str = 'Siddiqui, Mohammad Nahid';
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]]>
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var str = 'Viqar, Abdul Rub';
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]]>
Journal of Renewable Energies; Vol. 21 No. 3 (2018): Volume 21 (Regular); 473 - 485]]>
Journal of Renewable Energies; Vol. 21 No 3 (2018): Volume 21 (Regular); 473 - 485]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i3]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/705/1152]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/705]]>
10.54966/jreen.v21i3.705]]>
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var str = 'An investigation of incremental conductance based maximum power point tracking for photovoltaic water pumping system performances';
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]]>
PV water pumping systems]]>
Modeling]]>
Soudano-sahelian zone]]>
Prediction]]>
Optimization]]>
In this work, each components of the photovoltaic water pumping system have been modeled in the Matlab/Simulink platform using meteorological data obtained from the field for the specific month corresponding to the hottest one of the year and for different total heads or pump loads. Optimization is done using the incremental conductance MPPT techniques which help to track the maximum power available in the photovoltaic module at each time and then feed the pump with optimal power. The results of this simulations show the effectiveness of the optimized system compare to the direct-coupled one. For the considered water pumps, daily flow rates are predicted and permit to calculate monthly total volume of water which is in the range of 122 m3 to 200 m3 for the total heads in the range of 60 m to 24 m with optimization and in the range of 12 m3 to 43 m3 for the same range of total heads without optimization. This study also shows the relevance of the optimized system compare to the direct-coupled system for providing water in rural areas of soudano-sahelian zone of Cameroon.]]>
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var str = 'Kodji , Deli';
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]]>
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var str = 'Houdji, Etienne Tchoffo';
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]]>
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var str = 'Djongyang, Noël';
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]]>
var options = {
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var str = 'Ayang, Albert';
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]]>
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var str = 'Tamba, Jean Gaston';
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]]>
Journal of Renewable Energies; Vol. 21 No. 3 (2018): Volume 21 (Regular); 455 - 472]]>
Journal of Renewable Energies; Vol. 21 No 3 (2018): Volume 21 (Regular); 455 - 472]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i3]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/704/1151]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/704]]>
10.54966/jreen.v21i3.704]]>
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var str = 'Algeria energy production, population growth based on Olduvai Theory';
document.write(linkifyHtml(str, options));
]]>
Olduvai theory]]>
Energy]]>
Population]]>
Civilization]]>
Growth]]>
During the last two centuries we have known nothing but exponential growth and in parallel we haveevolved what amounts to an exponential-growth culture, a culture so heavily dependent upon the continuance of exponential growth for its stability that it is incapable of reckoning with problems of no growth. So the Olduvai Theory is based on time-series data of world energy production and population; the data are arrays of discrete numbers year-on-year, not continuous functions of time. Hence the difference calculus must be used, not the infinitesimal calculus. Postulates 1 and 2 require that we distinguish intervals of linear growth from those of exponential growth. Global population has grown to 8.3 billion. Most, though not all, of that growth has been concentrated in South Asia and sub-Saharan Africa, in Algeria will growth to 52 million in 2050 and in 2100 will be 72 million, in Africa and in the same year 2050 will touched 1787 million and in the world will be 9655 million in 2050. The most important measure in the energy balance of Algeria is the total consumption of 42.87 billion kWh per year. Per capita this is an average of 1.065 kWh. Algeria could provide itself completely with self-produced energy. The total production of all energy producing facilities is 54 bn kWh. Thats 126 % of the countries own usage. Despite this Algeria trades its energy with foreign countries. Along with pure consumptions the production, imports and exports play an important role.]]>
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var str = 'Allali, Malika';
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var str = 'Tamali, Mohammed';
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Journal of Renewable Energies; Vol. 21 No. 3 (2018): Volume 21 (Regular); 445 - 454]]>
Journal of Renewable Energies; Vol. 21 No 3 (2018): Volume 21 (Regular); 445 - 454]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i3]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/703/1150]]>
application/pdf]]>
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info:eu-repo/semantics/article]]>
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https://revue.cder.dz/index.php/rer/article/view/703]]>
10.54966/jreen.v21i3.703]]>
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var str = 'Optimisation énergétique d’un bâtiment résidentiel autoproduite à Biskra à travers ses caractéristiques matérielles';
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Envelope]]>
Energy consumption]]>
Materials]]>
Self-product individual housing]]>
Hot and arid climate]]>
Le secteur résidentiel en Algérie est responsable de 41 % de la consommation totale d’électricité au niveau national et il représente, de fait, le secteur le plus énergivore. Le présent travail est consacré à l’étude de la performance énergétique des bâtiments résidentiels à travers l’optimisation de l’enveloppe architecturale relativement à un climat chaud et aride. L’habitat individuel autoproduite à Biskra est choisi comme cas d’étude pour évaluer l’influence des paramètres propre à l’enveloppe(les murs, la toiture, les fenêtres, etc...) sur la consommation énergétique et le confort thermique. Des tests de simulation ont été effectués à l’aide du logiciel TRNSYS 17 durant la période de surchauffe. Plusieurs alternatives relatives aux caractéristiques de l’enveloppe de l’habitat individuel autoproduit à Biskra ont été étudiées, l’objectif étant d’améliorer les conditions de confort thermique à l’intérieur des maisons tout en réduisant la consommation énergétique.]]>
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var str = 'Latreche, Sihem';
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Journal of Renewable Energies; Vol. 21 No. 3 (2018): Volume 21 (Regular); 433 - 443]]>
Journal of Renewable Energies; Vol. 21 No 3 (2018): Volume 21 (Regular); 433 - 443]]>
2716-8247]]>
1112-2242]]>
10.54966/jreen.v21i3]]>
Renewable Energy Development Center]]>
2023-10-12]]>
Copyright (c) 2021 Journal of Renewable Energies]]>
https://creativecommons.org/licenses/by-sa/4.0]]>
https://revue.cder.dz/index.php/rer/article/view/702/1149]]>
application/pdf]]>
eng]]>
info:eu-repo/semantics/article]]>
info:eu-repo/semantics/publishedVersion]]>
https://revue.cder.dz/index.php/rer/article/view/702]]>
10.54966/jreen.v21i3.702]]>