Journal of Renewable Energies https://revue.cder.dz/index.php/rer <p> </p> <p> </p> <center><strong>The Journal of Renewable Energies (Revue des Energies Renouvelables)</strong></center> <p> </p> <div style="padding: auto; height: auto; float: left;"><center><img src="https://revue.cder.dz/public/site/images/energiemanager/jreen-logo-home-page-2020.jpg" alt="" width="210" height="300" /><br /><strong>ISSN: 1112-2242</strong><br /><strong>EISSN: 2716-8247</strong></center><center></center></div> <p style="padding-left: 250px;"><strong>Description</strong></p> <p style="padding-left: 250px;">The Journal of Renewable Energies (Revue des Energies Renouvelables) is an international peer-reviewed journal published by the Renewable Energy Development Center (CDER). The journal was founded in 1998 to promote research and dissemination of knowledge on renewable energy. Two regular issues are published in June and November each year and special conference issues may be published upon request.</p> <p style="padding-left: 250px;">The Journal of Renewable Energies covers a wide range of topics that include but not limited to solar, wind, geothermal, biomass energy, hydrogen, and the environment. Particular attention is paid to energy analysis and modelling, energy conservation and storage, energy efficiency, energy demand and supply. The journal also welcomes papers on studies with an interaction between renewable energies and other scientific fields such as thermodynamics, mechanics, electricity, chemistry, biology, materials science and the protection of the environment.</p> <p> </p> <div style="width: 100%; padding: 10px; height: auto;"> <p><strong data-sider-select-id="8907bd95-c985-4b1c-b44e-e3e42d331bb3">Publishing Director</strong></p> <div class="name">Noureddine Abdelbaki, Professor.</div> <div class="affiliation">Renewable Energy Development Center (CDER), Algiers, Algeria</div> <div class="email"><a href="mailto:e.jreen@cder.dz" rel="noreferrer" data-sider-select-id="bb7db874-5c0c-41c5-9f53-59e66d78eb36">e.jreen@cder.dz</a></div> <div class="email"> </div> <p><strong data-sider-select-id="8907bd95-c985-4b1c-b44e-e3e42d331bb3">Editor-in-chief</strong></p> <div class="name">Amar Hadj Arab, Professor.</div> <div class="affiliation">Renewable Energy Development Center (CDER), Algiers, Algeria</div> <div class="email"><a href="mailto:e.jreen@cder.dz" rel="noreferrer" data-sider-select-id="80ba4c91-a94f-4bc8-8f30-0c4e99d694d6">a.hadjarab@cder.dz</a></div> <div class="email"> </div> <div class="email"><strong>Associate Editor<br /></strong></div> <div class="name">Ouahiba Guerri, Dr.</div> <div class="affiliation">Renewable Energy Development Center (CDER), Algiers, Algeria</div> <div class="email"><a href="mailto:e.jreen@cder.dz" rel="noreferrer">o.guerri@cder.dz</a></div> <div class="email"> </div> <div class="email"> </div> <div class="email"><strong>Support Contact</strong></div> <div class="email">Mohamed Debbache</div> <div class="email">Renewable Energy Development Center (CDER), Algiers, Algeria</div> <div class="email"><a href="mailto:m.debbache@cder.dz">m.debbache@cder.dz</a></div> <div class="email"> </div> <div class="email"><strong>Secretary</strong></div> <div class="email">Rafik Halalchi</div> <div class="email">Renewable Energy Development Center (CDER), Algiers, Algeria</div> <div class="email"><a href="mailto:s.revue@cder.dz">s.revue@cder.dz</a></div> <p> </p> <p> </p> <p style="font-size: 22px; color: red;" data-darkreader-inline-color=""><a href="https://revue.cder.dz/index.php/rer/ACCEPTED"><strong>ACCEPTED PAPERS FOR NEXT ISSUE</strong></a></p> </div> Renewable Energy Development Center en-US Journal of Renewable Energies 1112-2242 <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="https://creativecommons.org/licenses/by-sa/4.0/" data-original-title="">appropriate credit</a>, provide a link to the license, and <a id="indicate_changes_popup" class="helpLink" tabindex="0" title="" href="https://creativecommons.org/licenses/by-sa/4.0/" 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="https://creativecommons.org/licenses/by-sa/4.0/" 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="https://creativecommons.org/licenses/by-sa/4.0/" data-original-title="">technological measures</a> that legally restrict others from doing anything the license permits.</li> </ul> </div> Physico-chemical characterization of Al2O3/Ti6A4V type thermal barrier systems https://revue.cder.dz/index.php/rer/article/view/1345 <p align="justify">Al<sub>2</sub>O<sub>3</sub> alumina deposits were deposited on Ti6A4V titanium alloy substrates by rf-PVD at different substrate polarizations 0V, -50V, -100V and without polarization (wp). SEM images, at the surface of the deposits, showed a very good substrate coverage with a dense morphology. Quantitative EDS analysis of these deposits revealed the presence of the elements Al and O in these deposits. The mass percentage of these elements, at different polarizations of the substrate, varies between 51.72% and 56.19% for Al and between 43.80% and 48.27% for O. The images, revealed by AFM, showed well-spread deposits on the surface of the substrates with relatively uniform grooves. The values of the arithmetic roughness R<sub>a</sub>, ranging from 3.45 to 4.75 nm, testify to the low crystallinity of these deposits and an appreciable density. The DRX of these deposits in <img src="https://revue.cder.dz/public/site/images/rafik/mceclip1.png" width="19" height="17" /> mode showed a weak crystallization of the Al<sub>2</sub>O<sub>3</sub> phase and characteristic peaks of the partially crystallized phases Al<sub>0.3</sub>Ti<sub>1.7</sub>, and Ti<sub>0.7</sub>V<sub>0.3</sub>, resulting from the interaction of the elements of the Ti6A4V substrate and those of the Al<sub>2</sub>O<sub>3</sub> deposit.</p> Djamel Amari Khaoula Rahmouni Nadia Saoula Hafit Khireddine Youcef Khelfaoui Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 3 – 15 3 – 15 10.54966/jreen.v28i1.1345 Wide range dielectric behavior characterization of ternary composite (Re-BT-CaO) https://revue.cder.dz/index.php/rer/article/view/1338 <p align="justify">This article's primary objective is to investigate a ternary composite's dielectric behavior using time domain spectroscopy (TDS). A heterogeneous mixture of barium titanate (BT) and calcium oxide (CaO) in an epoxy resin matrix (RE) with a predetermined volume fraction level (70%) makes up this type of material. The remaining components (BT and CaO) are variable in increments of 07.50% and complete one another in order to achieve the final percentage, which is 30%. The different composite samples are created using the aforementioned stoichiometric ratios at room temperature and below atmospheric pressure. These mixes are put through a dielectric behavior analysis over a broad frequency range, from DC to 10 GHz. This study intends to highlight the impact of calcium oxide and barium titanate on the composite's dielectric behavior and on the form factor provided by the modified Lichtenecker equation (MLL). It follows a numerical method for optimizing of the predictive model of this law based on a better smoothing of this shape factor in order to allow a better concordance among the predicted values and practical ones. A comparison between the experimental data and the MLL values is performed in order to highlight the proposed model performance on the ternary composite dielectric permittivity estimation quality. This research's focus is on how these materials are used in micro- and nanoelectronics as well as telecommunication components fabrication.</p> Ayoub Bengherbia Wissal Madaci Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 17 – 26 17 – 26 10.54966/jreen.v28i1.1338 Impact of using corrugated wall and nanofluid on the performance improvement of thermoelectric generator mounted channels https://revue.cder.dz/index.php/rer/article/view/1344 <p align="justify">The influence of using a corrugated wall as a passive heat transfer enhancement technique for the sake of improving the power generation of thermoelectric generator (TEG) located in between two corrugated channels flowing nanofluid has been numerically examined. The upper and the lower channels carry hot and cold water-based single-walled carbon nanotube nanofluid (SWCNT), respectively. Finite element method, FEM, is chosen to tackle the 3D steady-state equations governing the TEG with associated boundary conditions. Several parameters related to the performance of thermoelectric generator such as Reynolds number (between 50 and 1000) and the number of corrugations (between 1 and 5) were in depth assessed. The findings indicate that the Reynolds number plays a significant role in improving thermoelectric power generation. When the Reynolds number increases, TEG produces a higher electric power value. However, the results also reveal that the number of corrugations has a limited impact on the performance of TEG.</p> Hessem Djeddou Brahim Fersadou Henda Kahalerras Mohamed Benelhaoues Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 27 – 41 27 – 41 10.54966/jreen.v28i1.1344 Towards a more powerful hydrogen engine https://revue.cder.dz/index.php/rer/article/view/1343 <p align="justify">This research examines the operational efficiency of a single-cylinder hydrogen engine through simulations conducted in OpenModelica. The research focuses on analyzing the combustion characteristics, heat release, temperature, and pressure at varying engine speeds of 1700, 2000, and 2500 rpm. The combustion process is modeled Applying the Wiebe function to represent the proportion of fuel mass that is burned, while the heat released by combustion is calculated using a formula incorporating the fuel mass, lower heating value, and combustion efficiency. The study presents detailed simulations of in-cylinder temperature, heat release rate, and pressure profiles, and examines how these parameters vary with engine speed. Results reveal that peak temperatures and heat release rates increase with engine speed, indicating more intensive combustion at higher speeds. The pressure curves and power output also show significant changes with speed, with higher engine speeds leading to increased power output and improved engine efficiency. This study provides insights into the hydrogen engine's behavior under different operating conditions, highlighting the impact of engine speed on performance metrics.</p> Hassina Ghodbane Fouad Khaldi Bahloul Derradji Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 43 – 49 43 – 49 10.54966/jreen.v28i1.1343 Prediction Cell Parameter of A2MX6 Cubic Perovskites https://revue.cder.dz/index.php/rer/article/view/1346 <p align="justify"><em>A<sub>2</sub>MX<sub>6</sub></em> perovskites materials have shown impressive advances in the last 50 years due on their photovoltaic application, made them one of the most-promising technologies for next-generation solar cells. We present in this work a semi empirical model for prediction of cell parameter of cubic A<sub>2</sub>MX<sub>6</sub> perovskites. It is useful for providing the predicted structural information for estimating the physical properties of materials for which accurate structural data are not available. We propose a linear formula according to the factors: Interatomic distance R<sub>A </sub>+ R<sub>X</sub> and R<sub>M</sub> + R<sub>X</sub> and electronegativity difference <img src="https://revue.cder.dz/public/site/images/rafik/mceclip0.png" /><img src="https://revue.cder.dz/public/site/images/rafik/mceclip1.png" />. The interatomic distances <em>d<sub>X</sub>-<sub>X</sub></em> and <em>d<sub>M-X</sub>d</em> can be estimated from the crystalline structure of the compounds studied. A new prediction of cell parameter is estimated for 90 perovskites and the results are compared with the experimental one whose error is of the order of 1.13%.</p> Hadda Krarcha Abdelhak Ferroudj Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 51 – 68 51 – 68 10.54966/jreen.v28i1.1346 Photocatalytic properties of Mn2O3 nanoparticles synthesized via green chemistry method https://revue.cder.dz/index.php/rer/article/view/1339 <p align="justify">The objective of this work is to synthesize Mn<sub>2</sub>O<sub>3</sub> nanoparticles (NPs) using green method based on olive leaf extract (OLE). These nanoparticles are intended for photocatalytic applications, specifically the degradation of pollutants and dyes using methylene blue (MB) as a test substance. The synthesized material, initially described as manganese oxide (Mn<sub>2</sub>O<sub>3</sub>), was characterized using various techniques: thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), FT-IR, Raman and UV-visible spectroscopies. Additionally, the photocatalytic tests were performed. XRD analysis revealed the formation of Bixbyite (Mn<sub>2</sub>O<sub>3</sub>) phases. Raman and FT-IR spectroscopy confirmed the presence of Mn-O bonds within the synthesized material. The TGA results supported the decomposition of organic compounds and the formation of the Mn<sub>2</sub>O<sub>3</sub>. The photocatalytic degradation tests with methylene blue yielded promising results. The addition of the synthesized material (Mn<sub>2</sub>O<sub>3</sub>) significantly enhanced the degradation of methylene blue, achieving an efficiency of 87.8%.</p> <div> </div> Nadjah Sobti samiha Chaguetmi Leila Amiour Youcef Aouabdia lynda Saci Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 69 – 77 69 – 77 10.54966/jreen.v28i1.1339 Biological properties study of bioactive diopside prepared from local raw materials https://revue.cder.dz/index.php/rer/article/view/1342 <p align="justify">In this study, it was synthesized of ultrafine-structured diopside granules using the sintering method from solid raw materials (Dolomite) at a temperature of 1300 °C for 2 hours. Following the preparation, the pawders were homogenized within the [200-400 um] range and then immersed in simulated body fluid (SBF) at 37°C for 2, 7, 14 and 21 days. Following different soaking durations, the samples were carefully extracted from the fluids using deionized water. Subsequently, they were air-dried at room temperature prior to examine the impact of immersion on their crystalline properties. This involved monitoring the variation in ion concentration and pH during the immersion periods, as well as using X-ray diffraction (XRD), characterization through scanning electron microscopy (SEM), Fourier transform infrared (FTIR), <em>and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) analysis</em>. The findings revealed the partial dissolution of ultrafine Structured diopside granules and the development of a layer of carbonate-hydroxyapatite (Ca<sub>10.00</sub>P<sub>6.00</sub>O<sub>26</sub>.<sub>14</sub>H<sub>2.60</sub>C<sub>0.02</sub>) on the surface of the samples after seven days of immersion, with a granular size estimated at D<sub>nm</sub>=102.96 nm. This volume continued to increase with longer dipping durations, reaching D<sub>nm</sub>=205.94 nm for samples immersed for 21 days. Finally, the results obtained suggest that ultrafine-structured diopside granules are promising candidates for bone regeneration.</p> Souheila Zouai Asma Fares Salma Khuwaylid Khawla Ezzedine Abdelhamid Harabi Copyright (c) 2025 Journal of Renewable Energies https://creativecommons.org/licenses/by-sa/4.0 2025-02-04 2025-02-04 79 – 91 79 – 91 10.54966/jreen.v28i1.1342