Journal of Renewable Energies <p> </p> <p> </p> <center><strong>The Journal of Renewable Energies (Revue des Energies Renouvelables)</strong></center> <p> </p> <div style="width: 100%; padding: auto; height: auto;"><center><img src="" alt="" width="310" height="400" /><br /><strong>ISSN: 1112-2242</strong><br /><strong>EISSN: 2716-8247</strong></center><center></center></div> <div style="width: 100%; padding: 10px; height: auto;"> <p> </p> <p><strong>Description</strong></p> <p>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. 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> <p><strong>Editor-in-chief</strong></p> <div class="name">Amar HADJ ARAB, Director of Research</div> <div class="affiliation">Renewable Energy Development Center (CDER), Algiers, Algeria</div> <div class="email"><a href="" rel="noreferrer"></a></div> <p> </p> <p><strong>Support Contact</strong></p> <p>Mohamed DEBBACHE, Senior researcher.</p> <p>Renewable Energy Development Center (CDER), Algiers, Algeria</p> <p><a href=""></a></p> <p> </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="" 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> Integration of PV Distributed Generator in Electrical Distribution System with Electric Vehicles Charging Stations Considering Uncertainties using Chaotic SSA Algorithm <p align="justify">The penetration of renewable energy resource units in the Electrical Distribution System (EDS) has gradually increased. In addition to that, the interest in the electrification of the transport sector has brought about increasingly significant incentives for the integration of Electric Vehicles Charging Station (EVCS). In this regard, the planning of the installation of PV source-based Distributed Generation (DG) units in EDS considering EVCS should be carefully considered to avoid stressing the EDS. This paper applied various Chaotic Salp Swarm Algorithm (CSSA) based various chaotic maps methods with the multi-objective functions that are considered minimizing simultaneous the Active Power Loss (APL), the Annual Losses Cost (ALC), and the Total Voltage Deviation (TVV) in EDS. The proposed algorithms are tested on a standard IEEE 69-bus system that is used to demonstrate the feasibility of the CSSA algorithm in allocating the DG units by considering the uncertainty of the power delivered by the DG as well as the variation of load demand and EVCS in 24 hours. Furthermore, the overall EDS performances are also enhanced with simultaneous placement of both devices.</p> Mohamed Zellagui Adel Lasmari Samir Settoul Rachid Chenni Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 5 – 24 5 – 24 Numerical Optimization of a Tandem Solar Cell based on InxGa1-xN <p align="justify">This article examines the best fraction of indium (x) and critical depth (H) of a single junction tandem photovoltaic (PV) cell (InxGa1-xN) in the vein to optimize its electrical efficiency. For better investigation, the optical and electronics parameters of a solar cell are determined as a function of the indium fraction and depth of the solar cell, leading to the resolution of the continuity equation and the establishment of the electrical characteristics (short circuit photocurrent, open-circuit photovoltage, maximum electric power). The outlet of our numerical investigations conducted under standard test conditions in the visible spectrum bandwidth of the irradiation, we found that the best indium fraction and the solar cell depth at the optimum electric power point are x=0.6 and H=1<img src="" /><sup>m</sup> (In0.6Ga0.4N) respectively. Furthermore under normalized irradiation condition (0.1 W/cm2, T=25oC), we found a maximum electric power and efficiency of about 28.53 mW/cm2 and 28.53% respectively.</p> François Beceau Pelap Eric Konga Tagne Abraham Dimitri Kapim Kenfack Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 25 – 39 25 – 39 Effect of cavity orientation on solidification/melting process of n-eicosane phase change material <p align="justify">In this paper, the melting and solidification of n-eicosane as a PCM inside two orientations of square containers is investigated numerically, using enthalpy–porosity method. The study reveals how the melting and solidification rate could be affected by changing the orientation of the phase change material container with a constant temperature boundary. It was found that the orientation of the square cavity has a significant effect on the melting and solidification rate of a PCM, the improvement is more than 40% for both cycles. Therefore the orientation of the heat exchange surface is a good control parameter for both the solidification and melting process</p> Farida Iachachene Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 40 – 55 40 – 55 Détermination de la vitesse de séchage du Curcuma par analogie au modèle de sorption de Bradley <p align="justify">In Madagascar, the drying of Curcuma consists of exposing them directly to the Sun. This is not always productive. This work aims to provide information on the drying of turmeric by determining the drying curve in order to consider industrial drying. To do this, two steps were conducted: an experiment of drying and modeling of the drying curve by analogy with the empirical model of Bradley. This allowed obtaining the drying curve of Curcuma. The obtaining of this curve allows to predict the behavior of the product in the drying and so to define the necessary energy to bring to dry it and especially, to determine the duration of drying. All this will be able to lead essentially in the theoretical and technical calculations for the realization of the dryer and continuation of the feasibility study of such a project</p> Laurencia Randriafeno Rajonandrianina Jean Désiré Ranarijaona Josoa Randriamorasata Jean Luc Rasoanaivo Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 56 – 74 56 – 74 Analyse Thermodynamique des Isothermes de Sorptions des Figues <p align="justify">In this study, the hygroscopicity and thermodynamic properties of figs were studied to simulate their hygroscopic behavior during storage and drying. The experimental results were analyzed by the nine models of sorption isotherms. The Peleg model was considered the most appropriate to describe the relationship between the equilibrium moisture content and water activity. The thermodynamic functions such as net isosteric heat sorption, the entropy of sorption, spreading pressure, net integral enthalpy, and entropy were determined. Net isosteric heat of sorption and sorption entropy decreased with increasing moisture content. The heat of desorption is slightly greater than that of adsorption with low moisture content. The integral net enthalpy decreases with the moisture content while the entropy integral net increased. The theory of enthalpy-entropy compensation can be successfully applied to water sorption by fig.</p> Abdelouahab Benseddik Hocine Bensaha Djemoui Lalmi Adiba Benahmed-djilali Ahmed Azzi Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 75 – 104 75 – 104 Small-signal modelling and stability analysis of island mode microgrid paralleled inverters <p align="justify">The autonomous operation mode of paralleled inverters in microgrids can be intentional or unintentional in order to ensure the continuity of supply. In this mode the voltage and frequency magnitudes are held by local controllers using droop control, this latter is generally considered to be the most adopted technic for the primary layer in a multilayer control structure due to their main feature of sharing the power equally between inverters, without needing communication infrastructure, the design of droop parameters is very crucial because a bad design can lead to the instability of the system. This paper presents a small-signal analysis for an MG composed of parallel-connected inverters in island mode and controlled using the droop method, aiming to analyze the stability by performing eigenvalues and sensitivity analysis which allows obtaining the behavior of the system, analyze the interaction between the different elements and study the influence of the droop parameters on this later which helps in the design procedure, small-signal model and Simulink block model was developed and simulated. Simulation results show a high correspondence and agreement between the model developed using Matlab Simulink-SimPowerSystem library and the developed small-signal model which confirms the validity of this later.</p> Ilyas Bennia Abdelghani Harrag Yacine Dailia Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 105 – 120 105 – 120 Investigation of the major internal and external factors that affect photovoltaic modules energy production and systems performance <p align="justify">Photovoltaic conversion is an optimal solution for the electrification of rural areas, especially deserts for the abundance of solar energy in these regions. In recent years, many studies have been carried out to maximize the energy productivity of a PV array system and increase its efficiency. However, the arid and semi-arid region is characterized by a climate whose parameters significantly influence the operation of PV installations. This paper presents an overview investigation of the major internal and external factors significantly affecting both the efficiency and the performance of solar cells and the power of PV systems. These factors include the type of PV material, solar radiation intensity received, cell temperature, parasitic resistances, cloud, and other shading effects, inverter efficiency, dust, module orientation, weather conditions, geographical location, and cable thickness. Simulation of a PV system has been carried out in MATLAB-SIMULINK to prove the effectiveness of the proposed modeling method. These simulation results are useful to predict the production of the PV module under real operating conditions.</p> Layachi Zaghba Messaouda Khennane Abdelhalim Borni Amor Fezzani Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 121 – 151 121 – 151 Revue sur les nanofluides et leurs applications dans le domaine de l'énergie solaire <p align="justify">In this article, an analysis of the integration of nanofluids and their applications in the field of solar energy has been discussed. Practically, several factors affect the physical properties of nanofluids. The use of nanofluids as an absorbent fluid is an effective approach to improve heat transfer in solar-powered devices. The main objective of this review is to examine and categorize all existing formulas and correlations on the physical properties and physical models of nanofluids, including thermal conductivity, viscosity, density, and specific heat, and to summarize the research carried out in recent years on the applications of nanofluids in solar energy systems. This article also identifies future research opportunities in the field of solar energy</p> Mohammed Bekhti Rachid Saim Copyright (c) 2021 Journal of Renewable Energies 2021-06-30 2021-06-30 24 1 152 – 176 152 – 176