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Preparation and characterization of zinc sulfide thin films through the sulfuration of sprayed zinc oxide thin films 通过对喷涂氧化锌薄膜的硫化制备硫化锌薄膜及其表征
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478892
M. Salah, S. Azizi, A. Boukhachem, C. Khaldi, M. Amlouk, J. Lamloumi
{"title":"Preparation and characterization of zinc sulfide thin films through the sulfuration of sprayed zinc oxide thin films","authors":"M. Salah, S. Azizi, A. Boukhachem, C. Khaldi, M. Amlouk, J. Lamloumi","doi":"10.1109/IREC.2016.7478892","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478892","url":null,"abstract":"In this study, the preparation of the zinc sulfide thin film by a substitution oxygen-sulfur inside sprayed ZnO compounds are investigated. First, the spray pyrolysis method has been used to grow the ZnO layers on glass substrates at 450 °C. The annealing process time was 12 hours. After a suitable cooling phase, the whole substrate-layer was introduced into a sealed tube. Consecutively, sulfur powder was introduced and vaporized under vacuum conditions inside the sealed tube containing the formerly ZnO prepared thin film. The structural properties of the prepared samples were characterized by X-ray diffraction (XRD) technique. We found that ZnS thin film have the cubic structure with a preferred orientation along (111) plane without any impurities and secondary phases. UV-VIS measurements show that the average transmittance of the ZnS thin films is between 63 and 73%. The optical band gaps for the ZnS and ZnO thin films were estimate too and it was 3.67 - 3.28 eV respectively.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125140851","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: 2
Control strategies for capacitor voltage balancing in modular multilevel converters 模块化多电平变换器中电容电压平衡控制策略
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478938
O. Abushafa, S. Gadoue, M. Dahidah, D. Atkinson, S. Ethni
{"title":"Control strategies for capacitor voltage balancing in modular multilevel converters","authors":"O. Abushafa, S. Gadoue, M. Dahidah, D. Atkinson, S. Ethni","doi":"10.1109/IREC.2016.7478938","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478938","url":null,"abstract":"Different schemes of modified conventional sorting algorithms with low complexity are proposed in order to balance the voltages of submodule (SM) capacitors for the modular multilevel converter (MMC). Two different procedures are investigated in this study. The main idea is to achieve voltage balance within the MMC arms with fewer current sensors. The two different methods are examined under different operating conditions; for instance, with a sudden change in the DC-source or when different load values are applied. The advantage of such sensor-less control methods is to simplify hardware communications in general. Moreover, the reliability of the MMC is also improved. Simulation analyses of a single-phase four-level MMC are conducted to show the effectiveness of the proposed methods.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122118471","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: 2
Operational cost optimization for renewable energy microgrids in Mediterranean climate 地中海气候条件下可再生能源微电网运行成本优化
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478881
I. Yahyaoui, R. Ghraizi, F. Tadeo
{"title":"Operational cost optimization for renewable energy microgrids in Mediterranean climate","authors":"I. Yahyaoui, R. Ghraizi, F. Tadeo","doi":"10.1109/IREC.2016.7478881","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478881","url":null,"abstract":"This paper is concerned with the energy management of a micro-grid composed of photovoltaic/ wind/diesel sources used to supply household loads. The control strategy manages the power flow between the power sources and the loads, which ensures the minimization of the installation operating cost, the safe operating for the battery bank while minimizing the use of the diesel engine. The strategy is tested using measured data of some climatic parameters of a Mediterranean area (Northern Tunisia), showing its efficiency in fulfilling the fixed objectives and respecting the criteria of the control strategy.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131417550","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
Crystal growth control by the crucible weighing method 用坩埚称量法控制晶体生长
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478909
Idir Hamadas, D. Ouadjaout, A. Manseri, A. Hakem, J. Chaminade
{"title":"Crystal growth control by the crucible weighing method","authors":"Idir Hamadas, D. Ouadjaout, A. Manseri, A. Hakem, J. Chaminade","doi":"10.1109/IREC.2016.7478909","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478909","url":null,"abstract":"The crucible weighing method has been successfully employed to reduce diameter fluctuations of oxide crystals pulled by the CZ technique. All the growth process, including the diameter of the growing crystal, is computer-controlled. A new algorithm for Automatic Diameter Control (ADC) is developed, and a software program written in Labview-6.1(NI) is described in detail.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131272460","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
Non-isothermal adsorption rate model of activated carbon-ethanol pair for solar cooling applications estimated through CFD simulation 通过CFD模拟估算了太阳能制冷用活性炭-乙醇对的非等温吸附速率模型
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478958
S. Jribi, T. Miyazaki, S. Koyama, B. Saha, Shinnosuke Maeda, T. Maruyama
{"title":"Non-isothermal adsorption rate model of activated carbon-ethanol pair for solar cooling applications estimated through CFD simulation","authors":"S. Jribi, T. Miyazaki, S. Koyama, B. Saha, Shinnosuke Maeda, T. Maruyama","doi":"10.1109/IREC.2016.7478958","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478958","url":null,"abstract":"Adsorption cooling systems (ACS) are feasible alternative to vapor compression cooling system as they employ natural and benign refrigerants and could be driven by solar energy or waste heat. Performance optimization of ACS could be carried out using CFD simulations with lower cost and faster time comparing to experimental testing. One of the crucial parameters to obtain reliable CFD simulation results is the diffusion time constant of adsorption rate equation estimated from experimental data. This study presents transient CFD simulations of ethanol adsorption onto activated carbon powder of type Maxsorb III carried out by Ansys-Fluent v14.5 software using 2D-axisymmetric geometry. The mathematical model consists of mass, momentum and energy conservation equations as well as adsorption isotherm and adsorption kinetic equations implemented via user defined functions (UDFs). The conditions used were same as those employed in gravimetric adsorption analyzer that is 30°C, 2.25 kPa and 3.32 kPa for temperature, initial and inlet pressures, respectively. Through multiple CFD simulations, we estimated the appropriate diffusion time constant of non-isothermal linear driving force (LDF) equation which led to simulated adsorption uptakes agreeing fairly with those measured experimentally. The mathematical model employing non-isothermal LDF equation could be implemented to simulate the heat and mass transfer in large scale adsorption/desorption bed and to optimize the performance of activated carbon-ethanol based adsorption cooling system.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116550741","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
A proposal of energy management strategy on hybrid renewable system with hydrogen backup 氢备份混合可再生能源系统能量管理策略的研究
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478902
F. Vivas, A. de las Heras, F. Segura, J. Andújar
{"title":"A proposal of energy management strategy on hybrid renewable system with hydrogen backup","authors":"F. Vivas, A. de las Heras, F. Segura, J. Andújar","doi":"10.1109/IREC.2016.7478902","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478902","url":null,"abstract":"This paper presents a proposal of energy management strategy for a Solar panels/Wind turbines/Fuel cell/Battery/Electrolyzer on grid hybrid power system, that improves the system performance. To get this target, technical and economical optimization parameters have been taken account in order to improve lifetime of different elements and reduce operation and maintenance cost. For this purpose, a simulator have been also developed in order to test different configurations of the energy management strategy, and realize a sensitive analysis in order to get the best technical and economical solution.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133988141","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: 7
Modeling of hydrothermal oxidation in supercritical water oxidation with energy recovery 超临界水氧化中热液氧化的能量回收模拟
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478908
Benmakhlouf Nadjiba, Outili Nawel, Meniai Abdesslam Hassen
{"title":"Modeling of hydrothermal oxidation in supercritical water oxidation with energy recovery","authors":"Benmakhlouf Nadjiba, Outili Nawel, Meniai Abdesslam Hassen","doi":"10.1109/IREC.2016.7478908","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478908","url":null,"abstract":"The hydrothermal oxidation is an efficient and clean way for wastewater treatment; it is also an energy self sufficient process under certain conditions, by the mean of the highly exothermic reaction of oxidation. In this present work, we studied the modeling of hydrothermal oxidation of phenol polluted water in supercritical conditions. First we apply a simple mathematical model for tubular reactor, resulting from mass, momentum and energy balances, which is often difficult to solve in its general form. According to adequate simplifications, the profiles of temperature and concentration of chemical species are computed along the reactor; using finite differences with a developed Mathcad program which returns results close to those from experimental works from literature. A design of experiment method was also applied to quantify the influence of operation conditions on the treatment efficiency and on the recovery of the heat generated by the exothermic reaction.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"465 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132702511","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
Fuzzy logic control scheme for a 3 phased asynchronous machine fed by Kaneka GSA-60 PV panels Kaneka GSA-60光伏板馈电三相异步电机模糊逻辑控制方案
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478893
H. Chaouali, H. Othmani, D. Mezghani, H. Jouini, A. Mami
{"title":"Fuzzy logic control scheme for a 3 phased asynchronous machine fed by Kaneka GSA-60 PV panels","authors":"H. Chaouali, H. Othmani, D. Mezghani, H. Jouini, A. Mami","doi":"10.1109/IREC.2016.7478893","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478893","url":null,"abstract":"This paper provides different results of simulations developed with MATLAB-SIMULINK environment consisting of modeling and controlling a photovoltaic system composed by Kaneka GSA-60 panels and supplying a 3 phased asynchronous machine. In order to maintain the best possible performance for a standalone functioning in different weather conditions; without using storage solutions; we have developed different parts of controlling system. The presented results show simulations of the developed model and the controlling system ; based on fuzzy logic technique; comparing its performance with and without Maximum Power Point Tracking system in different scenarios of solar irradiation and temperature variations.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"460 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133731922","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: 11
Generic colored petri nets modeling approach for performance analysis of smart grid system 智能电网系统性能分析的通用彩色petri网建模方法
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478905
Mhadhbi Zeineb, Zairi Sajeh, Belhassen Zouari
{"title":"Generic colored petri nets modeling approach for performance analysis of smart grid system","authors":"Mhadhbi Zeineb, Zairi Sajeh, Belhassen Zouari","doi":"10.1109/IREC.2016.7478905","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478905","url":null,"abstract":"In the context of smart grid, many have considered energy management approaches and have taken into account local, neighborhood, and/or grid energy sources. In such situations, energy management approaches allow designers to choose the best alternative meeting they may need (whatever decreases the energy cost and maximizes the producer's gains). In order to select the best energy management approach that allows an effective performance and considers the specificities of the studied grid, the designer has to study the global behavior of the system that is based on a specific model before implementation. The contribution presented in this paper is defined in this context. We propose a formal modeling and validation approach based on colored Petri nets (CP-nets). Such approach allows for the development of a generic model representing the overall behavior of the different components (producer, consumer, smart meter, energy management unit, local energy generator, utility) of a studied smart grid. Additionally, existing CP-net formal methods, specifically the state space generation and handling, may be utilized in order to formally verify the specified system (the safety and liveness property) as well as to generate a set of performance indicators. Depending on the obtained indicators, the designer may choose the best energy management approach meeting his/her requirement. An important advantage of our developed approach is that it is parameterized.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132542063","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: 6
Design of DC-DC converter for a grid connected inverter 并网逆变器DC-DC变换器的设计
2016 7th International Renewable Energy Congress (IREC) Pub Date : 2016-03-22 DOI: 10.1109/IREC.2016.7478921
A. Mraoui, L. Hassaine, M. Khelif
{"title":"Design of DC-DC converter for a grid connected inverter","authors":"A. Mraoui, L. Hassaine, M. Khelif","doi":"10.1109/IREC.2016.7478921","DOIUrl":"https://doi.org/10.1109/IREC.2016.7478921","url":null,"abstract":"Currently the use of energy from photovoltaic panels is a reality, and its extensive use will become extremely important in the research for solutions to energy and environmental problems. In this context, MPPT techniques are the most important part to extract the maximum power available. In this study, a DC-DC conversion system according to the boost topology has been designed. System tests were carried out outdoor at different solar radiation. First, the characteristic curve of the photovoltaic panel has been plotted, afterward the MPPT tracking system was connected. The controller communicates tracking data (current, voltage, duty cycle and power) at each step of the algorithm. Sometimes the algorithm deviates from the real maximum power point at first, making a false decision, but comes close thereafter. It is necessary to perform further investigations on this problem. An improvement of the used method is intended to take into account of all the constraints, so it would be possible to provide a simple and reliable system that tracks the maximum power point with minimum circuit and thus minimum consumption of energy.","PeriodicalId":190533,"journal":{"name":"2016 7th International Renewable Energy Congress (IREC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114117827","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
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