Energy Procedia最新文献_第3页

A Flexible Active and Reactive Power Control Strategy of a LV Grid Connected PV System 低压并网光伏系统的灵活有功无功控制策略

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.034

Nejib Hamrouni, Sami Younsi, Moncef Jraidi

{"title":"A Flexible Active and Reactive Power Control Strategy of a LV Grid Connected PV System","authors":"Nejib Hamrouni, Sami Younsi, Moncef Jraidi","doi":"10.1016/j.egypro.2019.04.034","DOIUrl":"10.1016/j.egypro.2019.04.034","url":null,"abstract":"<div><p>The aim of this paper is to present a command approach of a typical double-stage grid-connected PV system functioning under normal conditions and Symmetrical Grid Voltage Dips (SGVD). In Normal Operation Mode (NOM), the command developed rises the relatively low solar voltage to a suitable level corresponds to the Maximal Power Point Tracking (MPPT) and regulates, respectively, the dc-link voltage and the output inverter currents. It permits to inject energy into the grid at unity power factor and a current with low harmonic distortion. Under SGVD, the control strategy approach should ensure a stable connection as long as possible and inject some reactive power to support the grid faults. This command calculates dynamically active and reactive powers that inverter can deliver according to the level of voltage dips and inverter rating currents. Those values are used as reference to control output inverter currents, the dc-link voltage and to deactivate the MPPT command. To validate and to prove the effectiveness of the control strategy, some experimental results are also presented.</p></div>","PeriodicalId":11517,"journal":{"name":"Energy Procedia","volume":"162 ","pages":"Pages 325-338"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.egypro.2019.04.034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84657404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Experimental Study of the Combined RES-Based Generators and Electric Storage Systems for Public Buildings 基于res的公共建筑发电与蓄电联合系统的实验研究

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.029

K. Sahlaoui , A. Ben Mabrouk , H. Oueslati , S. Ben Mabrouk , D. La Cascia , G. Zizzo , S. Favuzza , F. Massaro , L. Dusonchet

{"title":"Experimental Study of the Combined RES-Based Generators and Electric Storage Systems for Public Buildings","authors":"K. Sahlaoui , A. Ben Mabrouk , H. Oueslati , S. Ben Mabrouk , D. La Cascia , G. Zizzo , S. Favuzza , F. Massaro , L. Dusonchet","doi":"10.1016/j.egypro.2019.04.029","DOIUrl":"10.1016/j.egypro.2019.04.029","url":null,"abstract":"<div><p>In the present paper, a new approach to the management of energy resources in the Research and Technology Centre of Energy (CRTEn -Tunisia) is proposed and evaluated by the monitoring of a PV installation realized for the cooperation project DE.DU.ENER.T, using renewable energy and economic criteria. The aim of this project is to improve energy efficiency order to minimize the electricity cost consumed at the CRTEn laboratory. According to the bills of electricity received, we noticed that there is a high consumption of electrical current. So, we targeted to install a photovoltaic field of 12KWc to reduce these bills by using the sustainable, green and clean sources.</p><p>A theoretical study of the PV system sizing realized in order to know in the first hand the compatibility between the different equipment of this installation and to compare the results with those found by the <em>SMA Sunny Design</em> and <em>PV*SOL</em> software in the second hand.</p><p>The experimental results show that the performance factor of the proposed system is 84.6%. Meanwhile, the cost of the energy generated by the proposed system is 0.045 USD/kWh, which means that the payback period, is about 11 years. The conclusion from this study is that the price of energy generated by PV systems in Tunisia is lower than the subsidized price of energy generated by fossil fuel.</p></div>","PeriodicalId":11517,"journal":{"name":"Energy Procedia","volume":"162 ","pages":"Pages 275-284"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.egypro.2019.04.029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73376824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Study of the effect of particles on the kinetic parameters of a turbulent two-phase flow 颗粒对湍流两相流动力学参数影响的研究

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.022

Mariem Bayoudh , Hazem Touati , Hmaied Ben N’Ticha

引用次数: 2

Combustion Characteristics of a Diesel Engine Fueled by Biodiesel-Diesel-N-Butanol Blend and Titanium Oxide Additives 生物柴油-柴油-正丁醇混合燃料和氧化钛添加剂的柴油机燃烧特性

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.006

Ahmed I. EL-Seesy , Hamdy Hassan

{"title":"Combustion Characteristics of a Diesel Engine Fueled by Biodiesel-Diesel-N-Butanol Blend and Titanium Oxide Additives","authors":"Ahmed I. EL-Seesy , Hamdy Hassan","doi":"10.1016/j.egypro.2019.04.006","DOIUrl":"10.1016/j.egypro.2019.04.006","url":null,"abstract":"<div><p>Jojoba biodiesel is considered a promising feedstock for renewable energy sources in different countries, however, it has a high viscosity which hinders it to be used with high blending ratio with diesel fuel. Meanwhile, there is a new technique which uses the nanoparticles as additives to diesel-biodiesel-alcohol blend to improve diesel engines performance. Therefore, in this study, to enhance the engine combustion and emission characteristics of a diesel engine, the titanium oxide (TiO<sub>2</sub>) (25 and 50 mg/L) is used as additives of 50% by volume Jojoba biodiesel, 40% diesel, and 10% n-butanol (denoted by J50D10Bu). The addition of TiO<sub>2</sub> nanoparticles to J50D10Bu blend shows that the peak pressure and heat release rate are increased up to 2% and 1.5% respectively. Additionally, the bsfc, as well as CO and UHC emissions, are decreased up to 17%, 30%, and 50% respectively, while NO<sub>x</sub> is increased in average by 30%. Subsequently, adding high jatropha biodiesel ratio (50% by volume) with 10% n-butanol and 40% diesel fuel with the addition of TiO<sub>2</sub> nanoparticles has the potential to accomplish ultra-low CO and UHC emissions meanwhile keeping high thermal efficiency level.</p></div>","PeriodicalId":11517,"journal":{"name":"Energy Procedia","volume":"162 ","pages":"Pages 48-56"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.egypro.2019.04.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88895052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

A Pentacene -Based Organic Mis Structures 基于五苯的有机Mis结构

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.025

N.A. Elgeme , S. Soued

引用次数: 3

Lattice Boltzmann approach for MagnetoHydroDynamic convective heat transfer 磁流体动力学对流传热的晶格玻尔兹曼方法

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.020

Raoudha Chaabane , Abdelmajid Jemni

{"title":"Lattice Boltzmann approach for MagnetoHydroDynamic convective heat transfer","authors":"Raoudha Chaabane , Abdelmajid Jemni","doi":"10.1016/j.egypro.2019.04.020","DOIUrl":"10.1016/j.egypro.2019.04.020","url":null,"abstract":"<div><p>Magneto-convection heat transfer mode inside a partially open-ended 2D enclosure, which is filled with conducting fluid, is considered as suitable research model in order to scope out our understanding into frequent decisive practicable applications in sustainable and renewable energy domains, especially solar energy collectors. Nevertheless surprising, continuously there is no existing literature dealing with it. Further, for Computational Fluid Dynamics (CFD)’s approaches, it is a considerable defiance to predict and anticipate this coupled complex physical engineering problem in MagnetoHydroDynamic (MHD) configurations. In the current numerical prototype, we introduce the lattice Boltzmann method (LBM) in the aim to overcome such engineering simulation difficulty. It is to be noted that this mesoscopic approach becomes nowadays an essential attractive and alternative for CFD approaches to simulate complex numerous fluid flow problems. ) has become an alternative and attractive approach to simulate numerous fluid flow problems. This paper intends to provide a brief review of researches on application of MHD convection with LBM on the prediction of thermodynamic behavior identifying more opportunities for future research. Besides, some new results are highlighted within this paper. To begin, the present LB model is validated against existing benchmark tests in literature. With the handout of this in house Fortran 90 LB code, we investigate the effects of Hartmann number, Rayleigh number, Prandtl number and the position of the partially open-ended side in the magneto-convective partially open ended y filled with conducting fluid cavity primly. It is established that these elements all impact flow and temperature fields patterns significantly. The obtained results can serve crucial theoretical prototypes for the related future practical magneto-convective applications. Our finding will be a useful tool allowing identifying opportunities for future research related to the considered engineering area.</p></div>","PeriodicalId":11517,"journal":{"name":"Energy Procedia","volume":"162 ","pages":"Pages 181-190"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.egypro.2019.04.020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79315353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Design of Fuzzy Controller rule base using Bat Algorithm 基于Bat算法的模糊控制器规则库设计

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.026

Nesrine Talbi

引用次数: 28

Motor Current Signature Analysis for the Air Gap Eccentricity Detection In the Squirrel Cage Induction Machines 鼠笼式感应电机气隙偏心检测的电机电流特征分析

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.027

N. Yassa , M. Rachek , H. Houassine

引用次数: 27

Maximum Power Point Tracking of PV system Based Cuckoo Search Algorithm; review and comparison 基于布谷鸟搜索算法的光伏系统最大功率点跟踪回顾与比较

Energy Procedia Pub Date : 2019-04-01 DOI: 10.1016/j.egypro.2019.04.013

Mohamed I. Mosaad , M. Osama abed el-Raouf , Mahmoud A. Al-Ahmar , Fahd A. Banakher