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2018 6th International Renewable and Sustainable Energy Conference (IRSEC)最新文献

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Open Circuit Voltage of a Lithium ion Battery Model Adjusted by Data Fitting 数据拟合调整锂离子电池模型开路电压
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702860
H. Hemi, N. M'Sirdi, A. Naamane, B. Ikken
This paper study the Lithium-ion battery dynamic behaviour and proposes a function to describe the relationship between its Open Circuit Voltage (OCV) and the State Of charge (SOC). The effects of environment parameters on the battery behaviour are analyzed. The proposed OCV equation (model) is implemented using MATLAB/Simulink and SimPowerSystems software packages and it is compared with experimental measurements provided by the CALCE group [1].
本文研究了锂离子电池的动态特性,提出了描述锂离子电池开路电压(OCV)与荷电状态(SOC)之间关系的函数。分析了环境参数对电池性能的影响。利用MATLAB/Simulink和SimPowerSystems软件包实现了所提出的OCV方程(模型),并与CALCE组提供的实验测量结果进行了比较[1]。
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引用次数: 6
Co3-xMnxO4 as a High Capacity Anode Material for Lithium Ion Batteries Co3-xMnxO4作为锂离子电池高容量负极材料
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8703014
L. Hdidou, I. Bezza, Y. Tamraoui, M. Dahbi, F. Ghamouss, H. Hannache, I. Saadoune, J. Alami, B. Manoun
In the recent years, nanostructured metal oxides have attracted a great interest as a promising anode materials for lithium-ion batteries. Co2.78Mn0.22O4 and Co2.82Mn0.18O4 nanoparticles belonging to Co3-xMnxO4 solid solution, were prepared by a sol-gel synthesis method employing alginate as a gelling agent. Characterized by X-Rays Diffraction (XRD) technique, the material crystallizes in the Fd-3m space group with the cubic spinel. As an anode materials for Li-ion batteries, Co2.78Mn0.22O4 exhibits high initial charge and discharge capacities of 723 and 429 mAh g-1, respectively. A reversible capacity of 418 mAh g-1 was maintained after 50 cycles at 180 mAg-1. Compared to Co2.82Mn0.18O4, Co2.78Mn0.22O4 with high Mncontent exhibits better performances.
近年来,纳米结构的金属氧化物作为锂离子电池极具潜力的负极材料引起了人们的极大兴趣。以海藻酸盐为胶凝剂,采用溶胶-凝胶法制备了Co3-xMnxO4固溶体Co2.78Mn0.22O4和Co2.82Mn0.18O4纳米颗粒。通过x射线衍射(XRD)技术表征,材料在Fd-3m空间群中结晶,具有立方尖晶石。作为锂离子电池的负极材料,Co2.78Mn0.22O4具有较高的初充放电容量,分别为723 mAh g-1和429 mAh g-1。在180 mAg-1下循环50次后,可保持418 mAh g-1的可逆容量。与Co2.82Mn0.18O4相比,高mn含量的Co2.78Mn0.22O4表现出更好的性能。
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引用次数: 0
Numerical Investigation of Temperature and Current Density Distribution on (PEM) Fuel Cell Performance 温度和电流密度分布对PEM燃料电池性能影响的数值研究
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702920
Y. Amadane, H. Mounir, A. Marjani, Ettouhami Mohamed Karim
PEM fuel cell model is developed in the ANSYS code. The proposed model can be used for studying the physical parameters effect on PEMFC performance. The main purpose of this study is to use a model for simulating the temperature distribution, (I-V) curve, as well as the current density distribution in the PEM fuel cell. The results showed that the performance of proton exchange membrane fuel cell (PEMFC) is improving with increasing temperature. These findings can be used to gain a better understanding of the functioning of the PEMFC system.
在ANSYS软件中建立了PEM燃料电池的模型。该模型可用于研究物理参数对PEMFC性能的影响。本研究的主要目的是利用一个模型来模拟PEM燃料电池的温度分布、(I-V)曲线以及电流密度分布。结果表明,质子交换膜燃料电池(PEMFC)的性能随着温度的升高而提高。这些发现可以用来更好地理解PEMFC系统的功能。
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引用次数: 4
Impact of the Parabolic Solar Concentrator’s Rim Angle on the Quantity of Reflected Rays and Concentrated Flux on the Receiver 抛物面聚光器边缘角对反射光量和聚光通量的影响
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8703031
R. Idlimam, A. Bah, M. Asbik, M. Malha, H. Kazdaba
The purpose of this study is to define the effect of the Solar Parabolic Concentrator’s rim angle on the quantity of the reflected rays and the concentrated flux of the receiver. Six rim angles $15^{circ}, 25^{circ}, 45^{circ}, 60^{circ}, 75^{circ}$ and 90° have been studied and simulated using Comsol multiphysics which is a numerical simulation software based on the finite element method. A simulation was carried out under genuine states of ambient temperature and direct normal radiation in Rabat. The results show that the best rim angle is $45^{circ}. For$ this optimal value of the rim angle, the obtained concentration ratio is of the order of 71, the average received flux is about 61.13 $kW/m^{2}$ and the maximum temperature at the surface of the receiver is 676° C.
本研究的目的是确定太阳抛物面聚光器的边缘角对反射光线的数量和接收器的集中通量的影响。利用基于有限元法的数值模拟软件Comsol multiphysics,分别对15^{circ}、25^{circ}、45^{circ}、60^{circ}、75^{circ}$和90°六个边缘角进行了研究和模拟。在拉巴特市真实环境温度和正常直接辐射状态下进行了模拟。结果表明,最佳边缘角为$45^{circ}。在此最优边缘角值下,得到的浓缩比约为71,平均接收通量约为61.13 $kW/m^{2}$,接收器表面的最高温度为676℃。
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引用次数: 1
Demand Side Management Strategy by Optimal Day-ahead Load Shifting in Smart Grid 基于最优日前负荷转移的智能电网需求侧管理策略
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702994
Rajaa Naji El Idrissi, M. Ouassaid, M. Maaroufi
In this work a load shifting for demand side management (DSM) strategy is developed. The strategy is based on an improved version of differential evolution DE, named Back Tracking Search Algorithm (BSA) is proposed in order to minimize the peak load demand and the total utility cost of three kinds of customers i.e. residential, commercial and industrial. The obtained simulation results are compared with those obtained using Particle Swarm Optimization (PSO) algorithm. This comparison highlights the effectiveness of BSA to handle a large number of different type devices.
在这项工作中,开发了需求侧管理(DSM)的负荷转移策略。该策略基于差分进化算法的改进版本,提出了反向跟踪搜索算法(Back Tracking Search Algorithm, BSA),以最小化住宅、商业和工业三类用户的峰值负荷需求和总效用成本。并将仿真结果与粒子群算法进行了比较。这种比较突出了BSA处理大量不同类型设备的有效性。
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引用次数: 3
Channeling of Static Electricity Within Wind Turbines for Transmission into the Power Grid 风力涡轮机内的静电输送到电网的通道
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702878
M. S. Davis, M. Madani
Wind turbines employed today are fabricated from a variety of materials. Many of these materials act as insulators, effectively causing electrons to accumulate. As wind turbines operate, their blades sweep through the air causing friction to occur between the air and blade material. As a substance with the highest positive charge tendency, dry air as such typically found at most land-based wind farms pass their electrons onto the wind turbine blades by means of contact electrification, causing electrostatic accumulation. Unless properly discharged, this static electricity can be harmful to the sensitive electronics found within wind turbines. To further increase the power output of wind turbines in addition to promoting safe equipment operating conditions, this static electricity can be channeled into super capacitors for accumulation and storage. Once sufficient charge is obtained within the super capacitor, this static electricity can then be allocated to the power grid to further improve wind turbine power output. The scope of this research is to analyze the capability of channeling static electricity from wind turbine structural components into a super conductor for transmission into the power grid. This research is intended to (1) assess the means for successfully channeling electrostatic charge within wind turbines, (2) investigate the effect of electrostatic accumulation and discharge within super conductors located inside a wind turbine, and (3) assess the economic impact and feasibility of accumulating and storing static electricity within wind turbines for transmission into the power grid.
目前使用的风力涡轮机由多种材料制成。这些材料中的许多起绝缘体的作用,有效地引起电子的积累。当风力涡轮机工作时,它们的叶片在空气中扫过,导致空气和叶片材料之间发生摩擦。干燥空气作为一种具有最高正电荷倾向的物质,通常在大多数陆基风电场中发现,干燥空气通过接触带电的方式将其电子传递到风力涡轮机叶片上,从而引起静电积累。除非适当地释放,这种静电可能对风力涡轮机内的敏感电子设备有害。为了进一步提高风力涡轮机的功率输出,除了促进设备的安全运行条件,这些静电可以引导到超级电容器中进行积累和储存。一旦在超级电容器内获得足够的电荷,这些静电就可以分配给电网,以进一步提高风力涡轮机的功率输出。本研究的范围是分析将风力涡轮机结构部件产生的静电导入超导体并传输到电网的能力。本研究旨在(1)评估风力涡轮机内成功引导静电电荷的方法,(2)调查风力涡轮机内超导体内静电积累和放电的影响,以及(3)评估风力涡轮机内积累和储存静电并传输到电网的经济影响和可行性。
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引用次数: 0
Magnetite Versus Quartzite: Potential Candidates for Thermocline Energy Storage 磁铁矿与石英岩:温跃层储能的潜在候选者
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702941
Y. F. Baba, A. A. Mers, H. Ajdad, A. Bouatem
The objective of this work is to investigate magnetite storage performances using thermocline packed-bed single tank concept and confront it with the quartzite commonly used as TESM in this area. To achieve this purpose dual phase model for thermal energy storage (TES) is developed for describing heat and masse transfer inside the porous packed-bed contained in the storage tank. After validation, the developed model is used to simulate the thermal behavior discharging process and then to evaluate system performances by calculating discharge efficiency and storage efficiency for two TESMs: magnetite and quartzite coupled with Colza oil as a heat transfer fluid (HTF). This paper presents and discusses results of discharge efficiency and storage efficiency obtained for both TESM and highlights the impact of TESM choice on TES efficiency.
本研究的目的是利用温跃层填充床单罐概念研究磁铁矿的储存性能,并将其与该地区常用的石英岩作为TESM进行比较。为了实现这一目的,开发了用于描述储气罐内多孔填料床内传热和传质的热储双相模型。验证后,将所建立的模型用于模拟热行为放电过程,并通过计算磁铁矿和石英岩两种TESMs(以油菜油为传热流体)的放电效率和储存效率来评估系统性能。本文介绍并讨论了两种TESM的放电效率和存储效率的结果,并重点介绍了TESM的选择对TES效率的影响。
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引用次数: 3
Impact of Anthropogenic Aerosols on Solar Beam Radiation Serving CSP Fields (Heliostat) in Morocco 摩洛哥人为气溶胶对为CSP场(定日镜)服务的太阳光束辐射的影响
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702982
A. Beyoud, A. Bouhaouss, N. Hassanain
A number of conferences around the world have called to make serious efforts for preserving the environment in order to reduce the aerosols with urban and industrial origin. It is worth pointing out that maximization of the reduction of aerosols in atmosphere is feasible. This allows a gain, in terms of thermal energy in solar power plants. Consequently, the assessment of heat gained by reducing anthropogenic aerosol were achieved to (-5%, -10% and -15%), resulting for each 5% reduction of anthropogenic aerosol make 1% of heat gained against the actual aerosol esteemed as 2.2 of aerosol optical depth (AOD) at 550nm conforming respectively (22.3, 44.7 and 67.4) MW in the solar of heliostat field at Ouarzazate of 1.3 km of the extreme heliostat with 144 m2 of surface for each one. The average of attenuation atmospheric between heliostats and receiver tower is found respectively (9.4%, 8.9% and 8.5%) against 9.9% in the real situation.
世界各地的一些会议呼吁认真努力保护环境,以减少城市和工业产生的气溶胶。值得指出的是,最大限度地减少大气中气溶胶是可行的。就太阳能发电厂的热能而言,这是一种增益。因此,减少人为气溶胶获得的热量评估达到(-5%,-10%和-15%),结果每减少5%的人为气溶胶,在550nm处的气溶胶光学深度(AOD)为2.2时,实际气溶胶获得的热量的1%分别符合(22.3,44.7和67.4)MW在Ouarzazate的极端定日镜场1.3 km,每个定日镜的表面为144 m2。定日镜与接收塔之间大气衰减的平均值分别为9.4%、8.9%和8.5%,而实际衰减值为9.9%。
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引用次数: 3
Numerical Study of Shell and Tube Heat Exchangers with Different Baffle Cuts 不同折流板切口管壳式换热器数值研究
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702876
Ihssane El Ghandouri, Anas El Maakoul, M. Meziane, N. Choab, Yassin Naim, S. Saadeddine
In this work, the thermo-hydraulic performance of shell and tube heat exchangers with segmental baffles (STHX) were investigated numerically for different baffle cuts. The heat transfer coefficient and the pressure drop have been considered as key parameters. These two parameters depend on the fluid flow path, which affected by the baffles characteristics (type, spacing, and the baffle cut). Baffles are used to improve heat transfer on the shell-side, but they increase the pressure drop, thus requiring a higher pumping power. This Phenomenon reduces the exchanger efficiency. For this purpose, the influence of different baffle cuts in a STHX on the heat transfer coefficient and the pressure drop were studied. The ratio $displaystyle frac {h_{s}}{Delta _{p}}$ has been taken as a criterion of performance evaluation and the commercial software Ansys-Fluent has been adopted to conduct the simulations. The results show that the heat transfer coefficient and the pressure drop are sensitive to the baffle cut selection. The maximum performance could be obtained with a baffle cut of 25%.
本文采用数值计算方法,研究了不同折流板切口下带节段折流板管壳式换热器的热工性能。传热系数和压降被认为是关键参数。这两个参数取决于流体的流动路径,流动路径受挡板特性(类型、间距和挡板切割)的影响。挡板用于改善壳侧的传热,但它们增加了压降,因此需要更高的泵送功率。这种现象降低了换热器的效率。为此,研究了STHX不同折流板切口对换热系数和压降的影响。以比值$displaystyle frac {h_{s}}{Delta _{p}}$作为性能评价标准,采用商业软件Ansys-Fluent进行仿真。结果表明:换热系数和压降对折流板切口的选择较为敏感;当挡板切割为25时,可获得最大性能%.
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引用次数: 4
Comparative Study on Cu2ZnSnS4 (CZTS) Thin Film using Different Sulfur Precursor 不同硫前驱体Cu2ZnSnS4 (CZTS)薄膜的比较研究
Pub Date : 2018-12-01 DOI: 10.1109/IRSEC.2018.8702966
S. Azmi, E. Khoumri, M. E. Marrakchi, M. Nohair, S. Tayane, Karima Echcherki, M. Dabalà
This work involves the synthesis and the characterization of CZTS layers. The films were prepared on ITO/glass substrate by one step electrodeposition technic without using the sulfurization step and compared with CZTS films prepared by sulfurization of electrodeposited Cu-Sn-Zn precursors. By adding Thiourea as a sulfur source and KSCN as a complexing agent, the electrodeposition process can give better results. Therefore, the effect of the sulfur source is investigated. The characterization of the absorber films was done by Cyclic Voltammetry (CV), ICP compositional analysis method, X-Ray Diffraction (XRD) and Scanning Electron Microscopy. The single step electrodeposition process is suggested to be better than the sulfurization and post-annealing treatment method.
这项工作涉及到CZTS层的合成和表征。采用一步电沉积技术在ITO/玻璃衬底上制备了该薄膜,并与电沉积Cu-Sn-Zn前驱体经硫化法制备的CZTS薄膜进行了比较。以硫脲为硫源,KSCN为络合剂,电沉积效果较好。因此,研究了硫源的影响。利用循环伏安法(CV)、ICP成分分析、x射线衍射(XRD)和扫描电镜对吸收膜进行了表征。单步电沉积工艺优于硫化后退火工艺。
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引用次数: 4
期刊
2018 6th International Renewable and Sustainable Energy Conference (IRSEC)
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