Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078260
Khadije El Kadi, I. Janajreh
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.
{"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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078327
Najat Magouh, Yassin Belkourchia, H. Bakhti, Azrar Lahcen
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.
{"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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078333
M. Khelif
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.
{"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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078250
W. Merrouche, I. Gaci, S. Ould-amrouche, Anis Boubezari
DC/DC converter, as a Power Processing Unit (PPU), is utilized in the solar controller in order to adjust the required input (PV panel) to the outputs: battery and load. This paper is a contribution to a perfect description of a PWM buck converter used in a PV controller to efficiently control the energy flow in a standalone PV system. The block diagram and detailed electrical schematic of the proposed controller are described. The different parts of the power board are discussed. The work was crowned by the realization and static/dynamic tests of the converter circuit that show good results. The presented work is an important contribution to designing an accurate solar charger power board.
{"title":"PWM Buck Converter used in PV Controller","authors":"W. Merrouche, I. Gaci, S. Ould-amrouche, Anis Boubezari","doi":"10.1109/IRSEC48032.2019.9078250","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078250","url":null,"abstract":"DC/DC converter, as a Power Processing Unit (PPU), is utilized in the solar controller in order to adjust the required input (PV panel) to the outputs: battery and load. This paper is a contribution to a perfect description of a PWM buck converter used in a PV controller to efficiently control the energy flow in a standalone PV system. The block diagram and detailed electrical schematic of the proposed controller are described. The different parts of the power board are discussed. The work was crowned by the realization and static/dynamic tests of the converter circuit that show good results. The presented work is an important contribution to designing an accurate solar charger power board.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"35 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":"84258761","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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078184
S. Rashkeev, Merid Legesse, H. Saidaoui, Fedwa El Mcllouhi, S. Ahzi, F. Alharbi
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.
{"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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078308
Kawtar Lamhour, Abdeslam Tizliouine
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.
水平轴风力涡轮机(HAWTs)机舱内的部件和子系统总是引起最高的可靠性问题。在这些子系统中，我们发现齿轮箱在工业应用中应用广泛，由于齿轮箱运行条件困难，不可避免的疲劳，高服务负荷等缺陷会在齿轮箱中发展，如果不能及早发现，其运行将不断恶化，从而造成机械和经济损失[1]。根据美国国家可再生能源实验室(National Renewable Energy Laboratory, NREL)的最新报告表明，风力发电机机舱齿轮箱故障大部分(76%)是由机械轴承引起的[2]。近年来，为了了解齿轮故障产生机理，开发出真实的故障检测与诊断方法，许多研究都建立了具有故障视点的齿轮箱动力学模型[3]。本文对水平轴风力发电机组齿轮箱的各种失效模式进行了研究，首先对垂直轴风力发电机组和HAWTs风力发电机组进行了比较研究，然后给出了更贴近实际的综合方法，分析了HAWT风力发电机组齿轮箱的不同失效模式，提出了不同的齿轮箱失效动态建模模型;检测和诊断，并提出了一项在摩洛哥公司进行的真实研究。
{"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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078325
N. Barth, S. Aly, S. Ahzi, B. Figgis
Qatar' ‘s and the Gulf region's photovoltaic (PV) energy potential is very high. Still, there are tradeoffs under such tropical arid climate, particularly regarding dust soiling losses during the long dry season. In-field performance analyses of PVs under varying soiling states enable the quantification of dust soiling losses. Such estimate of the soiling losses is done a posteriori, using temperature-corrected performance ratios. In the current paper, we study how exceptional events such as sandstorms and rainfalls are identified using statistical analyses of the soiling losses rates. The aim is to generate sets of synthetic years describing the regular dust soiling rates, as well as the exceptionally observed meteorological events. The proposed sets of yearlong synthetic soiling conditions have identical average statistical representativeness as our ongoing in-field experimental measurements. This especially allows economic assessments such as the optimization of dust cleaning scenarios of PV projects.
{"title":"Photovoltaic Dust Soiling Statistical Representation in Doha, Qatar","authors":"N. Barth, S. Aly, S. Ahzi, B. Figgis","doi":"10.1109/IRSEC48032.2019.9078325","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078325","url":null,"abstract":"Qatar' ‘s and the Gulf region's photovoltaic (PV) energy potential is very high. Still, there are tradeoffs under such tropical arid climate, particularly regarding dust soiling losses during the long dry season. In-field performance analyses of PVs under varying soiling states enable the quantification of dust soiling losses. Such estimate of the soiling losses is done a posteriori, using temperature-corrected performance ratios. In the current paper, we study how exceptional events such as sandstorms and rainfalls are identified using statistical analyses of the soiling losses rates. The aim is to generate sets of synthetic years describing the regular dust soiling rates, as well as the exceptionally observed meteorological events. The proposed sets of yearlong synthetic soiling conditions have identical average statistical representativeness as our ongoing in-field experimental measurements. This especially allows economic assessments such as the optimization of dust cleaning scenarios of PV projects.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"159 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":"77144237","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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078168
Hicham Bouzakri, A. Abbou
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.
{"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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078309
A. Mellalou, A. Outzourhit, A. Baçaoui, Habiba Qaisari
This work presents a brief review of the scheffler reflector design methodologies. Particularity, all the equations involved in the design of the Scheffler collector's elliptical frame and crossbars are presented. A novel and simple crossbar design has been discussed and compared to the usual 3-points circular approximation.
{"title":"Design Methodologies of Scheffler Concentrators","authors":"A. Mellalou, A. Outzourhit, A. Baçaoui, Habiba Qaisari","doi":"10.1109/IRSEC48032.2019.9078309","DOIUrl":"https://doi.org/10.1109/IRSEC48032.2019.9078309","url":null,"abstract":"This work presents a brief review of the scheffler reflector design methodologies. Particularity, all the equations involved in the design of the Scheffler collector's elliptical frame and crossbars are presented. A novel and simple crossbar design has been discussed and compared to the usual 3-points circular approximation.","PeriodicalId":6671,"journal":{"name":"2019 7th International Renewable and Sustainable Energy Conference (IRSEC)","volume":"32 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":"76534909","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}
Pub Date : 2019-11-01DOI: 10.1109/IRSEC48032.2019.9078257
O. E. Manssouri, C. E. Fouas, B. Hajji, L. Bouselham, A. Rabhi, G. Marco Tina, A. Gagliano
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.
{"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}
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