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Journal of Renewable Energies / Revue des Energies Renouvelables
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1112-2242 - ISSN (Online) 2716-8247
Published by Renewable Energy Development Center, Algeria Homepage  [1 journal]
  • Integration of PV Distributed Generator in Electrical Distribution System
           with Electric Vehicles Charging Stations Considering Uncertainties using
           Chaotic SSA Algorithm

    • Authors: Mohamed Zellagui, Adel Lasmari, Samir Settoul, Rachid Chenni
      Pages: 5 – - 5 –
      Abstract: 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.
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Numerical Optimization of a Tandem Solar Cell based on InxGa1-xN

    • Authors: François Beceau Pelap, Eric Konga Tagne, Abraham Dimitri Kapim Kenfack
      Pages: 25 – - 25 –
      Abstract: 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=1m (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.
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Effect of cavity orientation on solidification/melting process of
           n-eicosane phase change material

    • Authors: Farida Iachachene
      Pages: 40 – - 40 –
      Abstract: 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
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Détermination de la vitesse de séchage du Curcuma par analogie au
           modèle de sorption de Bradley

    • Authors: Laurencia Randriafeno Rajonandrianina, Jean Désiré Ranarijaona, Josoa Randriamorasata, Jean Luc Rasoanaivo
      Pages: 56 – - 56 –
      Abstract: 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
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Analyse Thermodynamique des Isothermes de Sorptions des Figues

    • Authors: Abdelouahab Benseddik, Hocine Bensaha, Djemoui Lalmi, Adiba Benahmed-djilali, Ahmed Azzi
      Pages: 75 – - 75 –
      Abstract: 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.
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Small-signal modelling and stability analysis of island mode microgrid
           paralleled inverters

    • Authors: Ilyas Bennia, Abdelghani Harrag, Yacine Dailia
      Pages: 105 – - 105 –
      Abstract: 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.
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Investigation of the major internal and external factors that affect
           photovoltaic modules energy production and systems performance

    • Authors: Layachi Zaghba, Messaouda Khennane, Abdelhalim Borni, Amor Fezzani
      Pages: 121 – - 121 –
      Abstract: 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.
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
  • Revue sur les nanofluides et leurs applications dans le domaine de
           l'énergie solaire

    • Authors: Mohammed Bekhti, Rachid Saim
      Pages: 152 – - 152 –
      Abstract: 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
      PubDate: 2021-06-30
      Issue No: Vol. 24, No. 1 (2021)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762

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