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2022 13th International Renewable Energy Congress (IREC)最新文献

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Technical Feasibility Study of a Grid-Tied 85 MW Floating Solar PV Power Plant in Benghazi – Libya 利比亚班加西并网85兆瓦浮动太阳能光伏电站技术可行性研究
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001999
Ahmad Awad Ramadan, Gamal Hashem, Ahmed Tahir
The growing worldwide demand for power has increased the quest for low-impact alternative sources, with solar photovoltaic being highlighted as one of the most feasible choices. However, solar power plants need extensive ground areas, which are a significant constraint. This restriction may be overcome if the panels are positioned on bodies of water. From this standpoint, the idea of Floating photovoltaic system installed in water bodies such as natural lakes or dams’ reservoirs was emerged, which provides advantages, the most important of which is an increase in production capacity as a result of the low temperature of the panel.in this search examined the possibility of floating PV systems for Benghazi Libya's Great Omar al-Mukhtar reservoir and was then compared to the same system but on the land. The architecture of the two PV systems was planned with the optimum tilt angle and photovoltaic spacing between the two systems in mind. The National Renewable Energy Laboratory (USA) System Advisor Model (SAM) was utilized to perform energy simulations based on meteorological data and system architecture. The findings showed that the planned floating PV system has risen by 4.16 percent over the ground PV system.
世界范围内不断增长的电力需求增加了对低影响替代能源的追求,太阳能光伏被强调为最可行的选择之一。然而,太阳能发电厂需要大面积的地面,这是一个很大的限制。如果面板放置在水体上,则可以克服这一限制。从这个角度来看,漂浮光伏系统安装在天然湖泊或水坝水库等水体中的想法应运而生,这提供了优势,其中最重要的是由于面板的低温而增加了生产能力。在这项研究中,研究了利比亚班加西大奥马尔穆赫塔尔水库浮动光伏系统的可能性,然后与陆地上的相同系统进行了比较。在规划两个光伏系统的结构时,考虑了两个系统之间的最佳倾角和光伏间距。利用美国国家可再生能源实验室系统顾问模型(SAM)进行基于气象数据和系统架构的能源模拟。调查结果显示,计划中的浮动光伏系统比地面光伏系统高出4.16%。
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引用次数: 0
Toward Reconfigurable DPP Converters 迈向可重构DPP转换器
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001949
Y. Mahmoud
Differential Power Processing (DPP) converters have been recently utilized for reducing the losses in partially shaded PV systems. Through enabling new paths for currents, shaded panels have less impact on blocking higher currents from series connected PV modules. This ultimately results in harvesting more power from partially shaded PV units. Unfortunately, the number of required DPP converters increases linearly with the number of series PV units. To address this challenge, this paper investigates the possibility of reconfiguring DPP converters reducing the number of needed converters. Instead of using a complete set of DPP converters, reconfiguring DPP converters could substantially reduce the number of needed converters. The used DPP converters will be connected to shaded units and reconfigured online with changes in shadings to reduce the mismatch power losses. Validation and verification through simulation is conducted to demonstration the effectiveness of the proposed idea.
差分功率处理(DPP)转换器最近被用于减少部分遮阳光伏系统的损耗。通过启用新的电流路径,阴影面板对阻挡串联PV模块产生的高电流的影响较小。这最终导致从部分遮阳的光伏装置中获得更多的电力。不幸的是,所需的DPP转换器的数量随着串联PV单元的数量线性增加。为了解决这一挑战,本文研究了重新配置DPP转换器以减少所需转换器数量的可能性。重新配置DPP转换器可以大大减少所需转换器的数量,而不是使用一套完整的DPP转换器。使用的DPP转换器将连接到阴影单元,并随着阴影的变化在线重新配置,以减少不匹配的功率损失。通过仿真验证和验证了所提思想的有效性。
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引用次数: 0
Parametric identification of a photovoltaic panel by the Firefly algorithm 基于Firefly算法的光伏板参数辨识
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001922
N. Ould Cherchali, M. R. Skender, B. Bentchikou, A. Tlemçani, A. Morsli
Solar cells are the basic structures of photovoltaic systems and solar energy conversion. Solar cell/module modeling involves the formulation of thenon-linear current versus voltage (I-V) curve. Determination of parameters plays an important role in solar cell/module modeling. This study concerns the extraction of five parameters of a solar cell with single diode, by using the new algorithm named firefly Algorithm (FA) for identification of these parameters based on the current-voltage characteristic. The found parameter values are compared with other algorithms swarm of particles (PSO) and the genetic algorithm (GA) based on the same data.
太阳能电池是光伏系统和太阳能转换的基本结构。太阳能电池/组件建模涉及非线性电流对电压(I-V)曲线的公式。参数的确定起着重要的作用在太阳能电池/模块建模。本文研究了单二极管太阳能电池的5个参数的提取,采用基于电流-电压特性的萤火虫算法(FA)对5个参数进行识别。将所得参数值与基于相同数据的粒子群算法(PSO)和遗传算法(GA)进行了比较。
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引用次数: 1
DOE of heat transfer and entropy generation in channel microheat exchanger driven by a coflow 共流驱动通道式微热交换器传热与熵产的DOE
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001923
R. Djebali, M. Ferhi
This paper aims to perform heat transfer and entropy generation in a micro medium filled with nanoliquid in the slip flow regime. The case of microchannel is investigated using a mesoscopic numerical analysis. The nanofluid flow is driven along the microchannel by a co- flow at the inlet. Near the top cold wall the flow is induced by a constant velocity (Uin) and hot temperature (TH) but near the bottom heated wall the nanoliquid is driven by a constant velocity (Uin/4) and a cold temperature (TC). The slip velocity and the temperature jump conditions are imposed to the walls. Lattice Boltzmann method was used to solve the obtained governing equation system by means of the SRT-BGK model. Attention was focused on the influence of the emerging input parameters such as Knudsen number (Kn), Reynolds number (Re), nanoparticles diameter (Dp) and volume fraction (Vf) on the heat transfer enhancement and entropy generation minimization throughout this paper. Correlations of heat transfer enhancement and volumetric entropy have been inscribed based on response surface methodology.
本文旨在研究纳米液体填充的微介质在滑移流动状态下的传热和熵生成。采用细观数值分析方法对微通道进行了研究。入口处的共流驱动纳米流体沿微通道流动。在顶部冷壁附近,纳米液体的流动是由等速(Uin)和高温(TH)诱导的,而在底部加热壁附近,纳米液体的流动是由等速(Uin/4)和低温(TC)驱动的。将滑移速度和温度跳变条件施加到壁面上。采用点阵玻尔兹曼方法,利用SRT-BGK模型对得到的控制方程组进行求解。本文重点研究了Knudsen数(Kn)、雷诺数(Re)、纳米颗粒直径(Dp)和体积分数(Vf)等输入参数对强化传热和最小化熵产的影响。基于响应面方法,计算了传热强化与体积熵的关系。
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引用次数: 1
Hydrogen-based Hybrid Renewable Energy System Sizing Optimization using HOMER 基于HOMER的氢基混合可再生能源系统规模优化
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10002028
A. Recioui, F. Z. Dekhandji
Conventional power systems are mostly based on fossil fuels. These constitute a substantial source of pollution in addition to being quickly depleted. Isolated areas and communities cannot profit from this type of electric energy for the reason that they are far from the grid. The hybrid renewable energy systems (HRES) have demonstrated to be an excellent solution for such a situation. The purpose of this paper is to design and optimize a standalone hybrid energy system to satisfy the electricity demand for a remote drilling site in Adrar province located in the South of Algeria. To cure the problem of intermittence of the solar and wind sources, a hydrogen-based set up is appended to the hybrid renewable energy system. The simulations are done using HOMER software to determine the optimal the HRES configurations considering techno-economic criteria.
传统的电力系统大多基于化石燃料。除了迅速耗竭之外,这也是一个重要的污染源。偏远地区和社区由于远离电网,无法从这种电能中获益。混合可再生能源系统(HRES)已被证明是这种情况下的一个极好的解决方案。本文的目的是设计和优化一个独立的混合能源系统,以满足位于阿尔及利亚南部Adrar省一个偏远钻井现场的电力需求。为了解决太阳能和风能的间歇性问题,在混合可再生能源系统中附加了一个氢基装置。利用HOMER软件进行仿真,综合考虑技术经济指标,确定最优的HRES配置。
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引用次数: 1
New Approach for Controlling PV-PV Differential Power Processing Converters 控制PV-PV差分功率处理转换器的新方法
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001944
Y. Mahmoud
Partial shading has serious impact on the efficiency and operation of solar PV systems resulting in significant power losses. Differential Power Processing (DPP) has been found effective in eliminating the impact of partial shading without adding extra power losses. They provide an effective alternative to distributed converters that require processing the entire extracted power scarifying the efficiency. This paper proposes a DPP structure that eliminates the needed voltage sensors for extracting the maximum power tracking. Instead of measuring the power of each individual PV submodule for tracking the maximum power, the proposed approach relies on maximizing the module current participating in eliminating the voltage measurements. Since the voltage of the module’s output is controlled by the output controller and can be considered constant to the faster inner controllers, operating the DPP converters to maximize the current should is demonstrated to maximize the power of the submodules. The effectiveness of the proposed structure is validated by simulation through Simulink under variety of shading scenarios.
部分遮阳严重影响太阳能光伏发电系统的效率和运行,造成巨大的功率损失。差分功率处理(DPP)已被发现在不增加额外功率损失的情况下有效地消除部分遮阳的影响。它们为分布式转换器提供了一种有效的替代方案,分布式转换器需要处理整个提取的电力,从而降低了效率。本文提出了一种DPP结构,该结构消除了提取最大功率跟踪所需的电压传感器。该方法不是测量每个PV子模块的功率来跟踪最大功率,而是依赖于最大化模块电流来消除电压测量。由于模块的输出电压是由输出控制器控制的,对于更快的内部控制器来说,可以认为是恒定的,因此操作DPP转换器以最大限度地提高电流应该被证明是为了最大限度地提高子模块的功率。通过Simulink仿真验证了该结构在各种遮光场景下的有效性。
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引用次数: 0
Performance Assessment of Ksourian Models: An Algerian case study Ksourian模型的绩效评估:一个阿尔及利亚案例研究
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001974
Khadidja Rahmani, N. Bouaziz
This research focuses on Ksourian models of Algerian country. The proposal work is to check and evaluate thermal performance of old technique, which are derived from the Ksourian model, using simulation tools. The adopted assessment method foresees the following steps: An inventory of Ksourian models in Algeria. Selecting typologies of the southwest area for making an exhaustive study on these typologies. Comparison of selected typologies "Ksourian models" to currently building. Reported research could contribute to make an assessment card mapping of Ksourian models in Algeria, which facilitates proposals improvement to this building type and participate to preserve this cultural heritage.
本研究的重点是阿尔及利亚国家的Ksourian模式。建议的工作是利用仿真工具对Ksourian模型导出的旧技术的热性能进行验证和评价。所采用的评估方法预见到以下步骤:阿尔及利亚的库里安模式清单。选取西南地区的类型学,对这些类型学进行了详尽的研究。所选类型学“Ksourian模型”与当前建筑的比较。所报告的研究可以有助于绘制阿尔及利亚的Ksourian模型的评估卡,这有助于提出改进这种建筑类型的建议,并参与保护这种文化遗产。
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引用次数: 0
Contours of Air and Brick Temperatures inside a Tunnel Kiln 隧道窑内空气和砖的温度曲线
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10002009
N. Soussi, W. Kriaa, H. Mhiri, P. Bournot
We present, in this work, the main results obtained from a two-dimensional numerical modeling of a tunnel kiln used for production hollow bricks. The results obtained made it possible to present contours of the temperature inside a tunnel kiln using a home-made two-dimensional code written with the open-source software SCILAB. The results showed the existence of a vertical temperature gradient in the brick stacks which can affect the final quality of the baked products.
在这项工作中,我们介绍了从用于生产空心砖的隧道窑的二维数值模拟中获得的主要结果。所获得的结果使得使用使用开源软件SCILAB编写的自制二维码来呈现隧道窑内的温度轮廓成为可能。结果表明,砖堆内存在垂直温度梯度,影响烘烤产品的最终质量。
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引用次数: 0
Optimal Placement of DGs in the Distribution Networks using an Analytical Approach 用分析方法优化配电网中dg的配置
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10001894
F. Z. Dekhandji, Habiba Baali, A. Recioui
The work deals with the penetration of Distributed Generators (DGs) units into a simple radial system. An analytical optimization method is used to determine the optimal locations and sizes of the DGs minimizing the power distribution loss. A load flow method called Backward/Forward is used. In addition, a method based on the calculation of Voltage Stability Index (VSI) is employed to ensure the stability of the system after the placement of DG units.
该工作涉及分布式发电机(dg)单元渗透到一个简单的径向系统。采用解析优化的方法,确定配电箱的最佳位置和尺寸,使配电损耗最小。使用了一种称为向后/向前的负载流方法。此外,采用基于电压稳定指数(VSI)计算的方法来保证DG机组安装后系统的稳定性。
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引用次数: 0
Modelling and Estimation of The Optimum Tilt Angle of Photovoltaic Systems, Case Study: Libya 光伏系统最佳倾斜角的建模与估计,案例研究:利比亚
Pub Date : 2022-12-13 DOI: 10.1109/IREC56325.2022.10002019
A. Teyabeen, F. Mohamed
The most important parameter for designing solar photovoltaic (PV) systems is the tilt angle of PV panels with horizontal surface. It determines the amount of radiation incident on PV panels surfaces, thus it is required for an economic evaluation of solar PV systems. For this reason, this study aims to estimate the optimum tilt angle of solar PV panels to exploit the maximum daily solar radiation on the inclined surface. The analysis was achieved based on measured data recorded in four cities of Libya. The optimum tilt angle was determined by changing the angle of surface from 0° up to 90° with the 1° resolution and searching for the maximum value of the corresponding daily total solar radiation. In addition, Six empirical models were established to estimate the optimum tilt angle of PV panels. Their empirical coefficients were determined using non-linear regression technique. The models accuracies were evaluated using statistical criteria such as mean bias error, MBE, root mean square error, RMSE, and correlation coefficient, R. A combined statistical indicator, CSI, has been developed to assess and rank the performance of models. The presented results showed that the optimum tilt angle in the four studied sites varied from 0° to 59° throughout the year, it increased during the winter and decreased during the summer. The results also showed that both third-order polynomial and Fourier model presented the best efficiency in estimating optimum tilt angle with R = 0.9943.
太阳能光伏系统设计中最重要的参数是光伏板的水平面倾斜角。它决定了入射到光伏板表面的辐射量,因此需要对太阳能光伏系统进行经济评估。因此,本研究旨在估算太阳能光伏板的最佳倾斜角度,以利用倾斜表面的最大日太阳辐射。该分析是根据利比亚四个城市记录的测量数据完成的。在1°分辨率下,将地表倾角从0°变化到90°,寻找对应的日总辐射最大值,确定最佳倾角。此外,还建立了6个经验模型来估计光伏板的最佳倾斜角度。利用非线性回归技术确定了它们的经验系数。采用平均偏倚误差、MBE、均方根误差、RMSE和相关系数r等统计标准对模型的准确性进行评估,并开发了一个综合统计指标CSI来评估模型的性能并对其进行排名。结果表明:4个研究点的最佳倾斜角度在0 ~ 59°之间,冬季增大,夏季减小;结果还表明,三阶多项式和傅里叶模型对最佳倾斜角的估计效果最好,R = 0.9943。
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引用次数: 0
期刊
2022 13th International Renewable Energy Congress (IREC)
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