2019 7th International Renewable and Sustainable Energy Conference (IRSEC)最新文献

Low Energy Desalination via Direct Contact Membrane Distillation: Looking Into the Concentration Polarization 直接接触膜蒸馏低能脱盐:浓度极化研究

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078260

Khadije El Kadi, I. Janajreh

{"title":"Low Energy Desalination via Direct Contact Membrane Distillation: Looking Into the Concentration Polarization","authors":"Khadije El Kadi, I. Janajreh","doi":"10.1109/IRSEC48032.2019.9078260","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078260","url":null,"abstract":"Membrane fouling due to concentration and temperature polarization is at the top list of restrictions for membrane distillation (MD) development. Yet, concentration polarization (CP) phenomenon has not been taken seriously in the evaluation of MD mass flux throughout the history of this field due to the complexity in the experimental setup. This work gives more insight into the observation and evaluation of CP in direct contact MD numerically. Computational fluid dynamics models of non-isothermal steady multi-species flow are conducted and coupled together to simulate the localized effect of CP at the feed-membrane interface. Additionally, a modified model with integrated spacers is also developed to investigate the practicality of spacers in reducing the CP effect at membrane surface and hence enhancing the performance. The model successfully captures the CP distribution in the feed channel where a concentration polarization coefficient (CPC) of 2.5 is recorded for seawater desalination running under typical operational conditions. Taking this value into consideration, a drop of 6% in mass flux evaluation is observed. On the other hand, spaced feed channel found to reduce CPC down to 1.83 proving the role of spacer in mixing the flow and mitigate the development of concentration polarization.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"86 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78202197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupled Identification Procedure of Piezoelectric Constants using PSO and Exact Solution by Stroh-like Formalism 压电常数的粒子群耦合辨识与类斯特罗式精确解

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078327

Najat Magouh, Yassin Belkourchia, H. Bakhti, Azrar Lahcen

{"title":"Coupled Identification Procedure of Piezoelectric Constants using PSO and Exact Solution by Stroh-like Formalism","authors":"Najat Magouh, Yassin Belkourchia, H. Bakhti, Azrar Lahcen","doi":"10.1109/IRSEC48032.2019.9078327","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078327","url":null,"abstract":"The paper presents an optimization technique for the identification of dielectric and elastic properties of simply supported rectangular functionally graded piezoelectric plates (FGPM) using the exact three dimensional solution for the static deformations under mechanical load of FGPM rectangular plates. The procedure uses the Stroh-like formalism to obtain the exact solution for FGPM plates which can be expressed in more concise and easier handling forms comparing to other more complicated semi-analytical or numerical approaches used in the literature. Particle Swarm Optimizer (PSO) is then used to solve the optimization problem in order to identify the piezoelectric material properties in the z-direction. In order to validate the given exact solution, a numerical example for a single-layer FGPM plate is presented and compared to the previous findings in the literature. Several numerical examples are presented using PSO algorithm to solve the identification problem of piezoelectric material constants and good results are obtaind. The obtained results confirm the efficiency of the proposed coupled procedure and demonstrate that the PSO algorithm is an effective technique for solving optimal design problems to improve the performance of the piezoelectric materials for more energy storage.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"28 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81629242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Detailed Design of a 6 KWp Grid Connected PV Plant with Storage Batteries: Part-I- Central Inverter Benchmark Study & Simulation 6kwp蓄电池并网光伏电站详细设计:第一部分-中央逆变器基准研究与仿真

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078333

M. Khelif

{"title":"Detailed Design of a 6 KWp Grid Connected PV Plant with Storage Batteries: Part-I- Central Inverter Benchmark Study & Simulation","authors":"M. Khelif","doi":"10.1109/IRSEC48032.2019.9078333","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078333","url":null,"abstract":"The distributed and intermittent characters of electrical energy production from renewable resources constitute the main challenges in the way of optimising the power transfer for grid connected systems in terms of efficiency, quality and reliability. Concerning the photovoltaic solar energy conversion, such performances being mainly related to the DC-AC stage, the grid connected inverter control strategy design became a major research subject to bring answers for the ever challenging grid technical regulations (grid codes). As a prerequisite option for active power bi-directional operation, the storage batteries pack is assumed here as an energy buffer directly connected between the DC-DC and DC-AC stages. As a consequence, the strong decoupling effect induced by imposing a constant DC link voltage, allows conducting the analysis and design of both parts separately. In this context and as part- I of the overall undertaken design project, a grid connected inverter using a hysteresis current control (HCC) strategy is pre-designed and optimised to serve as an open loop, bidirectional DC-AC power converter benchmark. Foreseeing the main practical realization constraints, an original sizing process of the associated line inductor is applied to limit the maximum switching frequency. Then, making use of the rich electrical engineering library of the SimPowerSystems toolbox under Matlab/Simulink environment, the designed grid connected installation is analysed through detailed simulations. Furthermore, particular control circuits are elaborated to generate properly the corresponding AC current reference and allow bi-directional active and reactive power flow decoupled control. Finally, reproducing tightly the detailed and realistic architecture of the planned realization, the resulting DC-AC stage structure is submitted to numerous validating tests as a power converter which may be further included in simple but robust active and reactive power control closed loops.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"9 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84214233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PWM Buck Converter used in PV Controller 用于PV控制器的PWM降压变换器

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078250

W. Merrouche, I. Gaci, S. Ould-amrouche, Anis Boubezari

引用次数: 0

Towards Control of Band Gap in Two-Dimensional Hexagonal Boron Nitride by Doping 掺杂控制二维六方氮化硼带隙的研究

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078184

S. Rashkeev, Merid Legesse, H. Saidaoui, Fedwa El Mcllouhi, S. Ahzi, F. Alharbi

{"title":"Towards Control of Band Gap in Two-Dimensional Hexagonal Boron Nitride by Doping","authors":"S. Rashkeev, Merid Legesse, H. Saidaoui, Fedwa El Mcllouhi, S. Ahzi, F. Alharbi","doi":"10.1109/IRSEC48032.2019.9078184","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078184","url":null,"abstract":"Recently boron nitride received a lot of attention due to its applications in optoelectronic devices, composites, and biological materials. In particular, it was proved to be useful as supporting substrates and gate dielectric layers in graphene-based structures. We performed first-principles calculations for aluminum doped two-dimensional (2D) hexagonal boron nitride (h-BN) layers. We found that the band gap strongly depends on Al concentration and increasing Al concentration diminishes the electronic band gap due to the formation of intermediate states in the h-BN gap. For Al concentration of 12.5%, the electronic band gap becomes 4.1 eV compared to 5.97 eV in the original undoped h-BN material. Such a significant band gap reduction makes this material promising for using in different UV optoelectronic and high-power electronic devices. We also statistically analyzed how interatomic distances between substitutional Al defects in this materials affect the value of the band gap. We found that the position of corresponding intermediate bands strongly depends on the interatomic distances between the substitutional defects. We also studied the statistical band gap distribution in doped boron nitride. In particular, we show that increasing concentration of Al substitutional defects in Al-doped h-BN increases the thermodynamic stability of the system which is also favorable for using heavily doped boron nitride in optoelectronic devices.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"14 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85032882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Different Failure Modes of the Horizontal Axis Wind Turbine Gearbox 水平轴风力发电机齿轮箱的不同失效模式

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078308

Kawtar Lamhour, Abdeslam Tizliouine

{"title":"Different Failure Modes of the Horizontal Axis Wind Turbine Gearbox","authors":"Kawtar Lamhour, Abdeslam Tizliouine","doi":"10.1109/IRSEC48032.2019.9078308","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078308","url":null,"abstract":"The components and subsystems in the horizontal axis wind turbines (HAWTs) nacelle always cause the highest reliability issues. Among these subsystems, we find that the gearbox is widely used in industrial applications, due to difficult operating conditions, inevitable fatigue, and high service load defects can develop in the gearbox, if they cannot be detected early, their operation will continue to deteriorate, which causes mechanical and economic losses [1]. According to the latest reports that were made by the National Renewable Energy Laboratory (NREL) indicates that the majority of gearbox failures in the nacelle of wind turbines (76%) are caused by mechanical bearings [2]. Latterly, many studies have been done to develop gearbox dynamic models with faults sight to understand gear fault generation mechanism, and then develop real fault detection and diagnosis methods [3]. This article was to make a state of the art on the various failure modes of the horizontal axis wind turbine gearbox, first, we will make a comparative study between vertical axis wind turbines and HAWTs wind turbines, then we will give a comprehensive approach to get closer to reality, analyze the different failure modes of the HAWT gearbox we will present the different models for the dynamic modeling of gearbox failures, detection and diagnosis and present a real study carried out within a Moroccan company.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"35 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76885681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Photovoltaic Dust Soiling Statistical Representation in Doha, Qatar 卡塔尔多哈光伏粉尘污染统计代表

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078325

N. Barth, S. Aly, S. Ahzi, B. Figgis

引用次数: 0

Study and Realization of A Monoaxial Solar Tracker Over an Equatorial Mount 赤道上单轴太阳跟踪器的研究与实现

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078168

Hicham Bouzakri, A. Abbou

{"title":"Study and Realization of A Monoaxial Solar Tracker Over an Equatorial Mount","authors":"Hicham Bouzakri, A. Abbou","doi":"10.1109/IRSEC48032.2019.9078168","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078168","url":null,"abstract":"A solar tracker is a mechanism that helps the photovoltaic panel to increase its power while keeping the latter oriented towards the sun. This paper aims to introduce an adjustment that makes our solar tracker efficient, by using a single tracking axis instead of two, in order to minimize the cost of production and the power dissipated, without reducing the efficiency of our photovoltaic panel. We chose a tracking mechanism used for telescopes, called equatorial mount since it allows us to follow perfectly the objects of the sky (the sun, the stars and the planets) with a single axis (this is the tracking axis). We began with a theoretical comparison, and simulation of the solar irradiation amount absorbed by our proposed system, and a perfect tracking system in order to derive the lost amount. The obtained results reveal that the decrease is negligible esteemed to be about 5%. After completing the realization project, we tested it by measuring the production and consumption of our tracker for a period of 24 hours. The results show that our solar tracker has a power gain of 49% compared to the fixed system, with minimal energy consumption.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"8 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85498170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Design Methodologies of Scheffler Concentrators 舍弗勒浓缩器的设计方法

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078309

A. Mellalou, A. Outzourhit, A. Baçaoui, Habiba Qaisari

引用次数: 0

Performance Analysis of Bi-fluid Photovoltaic/ Thermal (PV/T) Solar Collector 双流体光伏/热(PV/T)太阳能集热器性能分析

2019 7th International Renewable and Sustainable Energy Conference (IRSEC) Pub Date : 2019-11-01 DOI: 10.1109/IRSEC48032.2019.9078257

O. E. Manssouri, C. E. Fouas, B. Hajji, L. Bouselham, A. Rabhi, G. Marco Tina, A. Gagliano

{"title":"Performance Analysis of Bi-fluid Photovoltaic/ Thermal (PV/T) Solar Collector","authors":"O. E. Manssouri, C. E. Fouas, B. Hajji, L. Bouselham, A. Rabhi, G. Marco Tina, A. Gagliano","doi":"10.1109/IRSEC48032.2019.9078257","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078257","url":null,"abstract":"Compared to conventional PV/T solar collector, the bi-fluid PV/$T$ type enables to extract more heat producing hot air and hot water and thus increasing the total efficiency per unit of area. The use of both fluids leads to provide a variety of PV/$T$ thermal applications. In this paper, a mathematical modeling of a bi-fluid photovoltaic/thermal PV/$T$ solar collector type is developed and simulation was performed using MATLAB software. Furthermore, a performances comparison is carried out for four bi-fluid PV/$T$ collectors using different cooling fluid (eg.air,water) in simultaneous operating mode. In this context, the temperature distribution in different collectors layers, electric power generation efficiency and thermal power efficiency are evaluated and analyzed. According to obtained results, water- water cooled PV/$T$ collector proves a good effectiveness and reaches a higher electrical and thermal efficiency respectively of 11.16 % and 54.22%. This bi-fluid type is considered as the most provider of hot water in contrary to Air-air cooled PV/$T$ witch providing more hot air.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"4 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87523584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1