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An improved intermittent power supply technique for electrostatic precipitators 一种改进的静电除尘器间歇供电技术
Q2 Engineering Pub Date : 2022-09-21 DOI: 10.1515/ehs-2022-0047
Rajkumar Ganesamoorthy, S. Srinivasan
Abstract A cost-effective power supply design proposed for electrostatic precipitators (ESP) is presented in this work. The cost minimization is done in terms of eliminating the power transformer and reducing power consumed by the ESP unit. Usually, transformers are used to boost the voltage level in conventional systems on its input side, which is replaced by a combination of a high-frequency converter along with a voltage multiplier in a modular arrangement. By interconnecting these modules, the suitable voltage is built-up easily. An intermittent pulse energized supply is developed by the proposed system to reduce back corona and to save energy consumption. The modular arrangement also increases the lifetime of converter switches, by reducing the switching stresses developed across them during its high-frequency operation and by reducing the Total Harmonic Distortion (THD). The complete system is designed and analyzed using MATLAB SIMULINK. The obtained results are better than the existing methods used for generating intermittent energization, the THD is reduced to 35.78% and the voltage stresses also reduced to 1800 V. And a module is experimented and found that it is capable of producing 3 kV.
摘要:本文提出了一种高性价比的电除尘器电源设计方案。成本最小化是在消除电力变压器和减少ESP设备消耗的功率方面实现的。通常,在传统系统中,变压器是用来提高输入端的电压水平的,它被一个高频转换器和一个模块化的电压倍增器组合所取代。通过将这些模块互连,可以很容易地建立合适的电压。该系统开发了一种间歇脉冲电源,以减少反电晕,节约能源消耗。通过减少高频工作时产生的开关应力和减少总谐波失真(THD),模块化安排还增加了转换器开关的使用寿命。利用MATLAB SIMULINK对整个系统进行了设计和分析。所得结果优于现有的间歇发电方法,THD降低到35.78%,电压应力也降低到1800 V。并对一个模块进行了实验,发现它能产生3kv的电压。
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引用次数: 2
PZT and PVDF piezoelectric transducers’ design implications on their efficiency and energy harvesting potential PZT和PVDF压电换能器的设计对其效率和能量收集潜力的影响
Q2 Engineering Pub Date : 2022-09-21 DOI: 10.1515/ehs-2022-0087
Antiopi-Malvina Stamatellou
Abstract Despite the intensive research carried out in the last two decades, the actual performance of piezoelectric energy harvesters needs significant improvement for widespread applicability. Custom designed experimental set-ups and methods can be applied for the evaluation of new piezoelectric energy harvesters or modified design versions of existing transducers, in terms of efficiency and specific power. In this context, two representative types of commercial cantilever piezoelectric transducers, made of PZT and PVDF material respectively, were tested in various combinations of aerodynamic and harmonic base excitation. A line type laser was used along with long exposure photography for the visualisation of the piezofilm’s mode shapes, tip deflection and the digitization of the elastic line at the oscillation extrema. The harvested power was measured at on-resonance conditions and studied relative to the excitation combinations and the mode shapes. Energy conversion efficiency, defined as the ratio of the electric-field energy accumulated by the supercapacitors, over the total elastic strain energy change of the material during the oscillations is measured and compared. Design improvements are proposed for both transducer types to extract and absorb higher amounts of energy and improve their bandwidth to match the available excitation source characteristics.
摘要:尽管近二十年来进行了大量的研究,但压电能量采集器的实际性能仍有待提高,才能广泛应用。定制设计的实验装置和方法可以用于评估新的压电能量收集器或现有换能器的改进设计版本,在效率和比功率方面。在此背景下,分别由PZT和PVDF材料制成的两种具有代表性的商用悬臂式压电换能器在各种气动和谐波基激励组合下进行了测试。线型激光器与长曝光摄影一起使用,用于可视化压电薄膜的模态形状,尖端偏转和振荡极值处弹性线的数字化。在非共振条件下测量了收获的功率,并研究了与激励组合和模态振型的关系。测量并比较了能量转换效率,即超级电容器积累的电场能量与振荡过程中材料的总弹性应变能变化之比。提出了两种换能器类型的设计改进,以提取和吸收更多的能量,并提高其带宽以匹配可用的激发源特性。
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引用次数: 0
Experimental investigation of soiling effects on the photovoltaic modules energy generation 污染对光伏组件发电影响的实验研究
Q2 Engineering Pub Date : 2022-09-16 DOI: 10.1515/ehs-2022-0037
Gufran Adnan Jendar, Layth Abed Hasnawi Al-Rubaye, Imad Saeed Abdulrahman, Q. Hassan
Abstract The article describes an experimental investigation of the impact of soiling on the photovoltaic modules in northeastern, Iraq. Over five months, the voltage, current power and energy curves of two identical modules with varying cleaning strategies (one was naturally dusty while the other was cleaned regularly) were measured. The impact of soiling on the daily energy produced as well as rain accumulation and particulate matter concentrations are discussed. The results indicated that no losses occurred during wet seasons, but a considerable decline in performance was found during dry periods owing to soiling. Additionally, it was discovered that soiling has a bigger effect on the maximum power than the short-circuit current. After two dry summer months, the greatest power loss of up to 22% was seen. The daily energy loss due to soiling was determined to be 16% on average. Furthermore, there are four polynomial models that have been drowned in prediction photovoltaic module (voltage, current, power, and energy) degradation due to the accumulation of dust.
摘要本文介绍了在伊拉克东北部进行的一项关于污染对光伏组件影响的实验研究。在五个月的时间里,测量了两个相同模块的电压,电流功率和能量曲线,并采用不同的清洁策略(一个自然积尘,而另一个定期清洁)。讨论了污染对日发电量、雨水积累和颗粒物浓度的影响。结果表明,在丰水期没有发生损失,但在干旱期由于污染,性能明显下降。此外,还发现污垢对最大功率的影响比短路电流更大。经过两个干燥的夏季,最大的电力损失高达22%。由于污染造成的日能量损失平均为16%。此外,有四个多项式模型被淹没在预测光伏组件(电压、电流、功率和能量)由于粉尘积累而退化。
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引用次数: 7
A comprehensive review on electric vehicles: charging and control techniques, electric vehicle-grid integration 电动汽车研究综述:充电与控制技术、电动汽车与电网集成
Q2 Engineering Pub Date : 2022-06-24 DOI: 10.1515/ehs-2021-0083
P. Femy, J. Jayakumar
Abstract Energy consumption in the field of transportation comes next to industrial consumption worldwide. If transportation is completely powered by renewable energy, the utilization of fossil fuels can be drastically reduced, which will result in a lesser amount of greenhouse gas emissions. Electric vehicles (EVs) can act as an alternative to make transportation pollution-free. Large-scale usage of EVs causes high electricity demand on the supply system. This problem can be overcome by utilizing renewable energy sources (RESs) for Electric Vehicle charging. Due to the unpredictability of RESs, coordinating EV charging with other loads and renewable generation is problematic. By using EVs as energy units, power fluctuations in the electric grid can be compensated. This paper presents a summary of recent research in the domain of integration of electric vehicles (EVs) to the smart grid. Electric vehicles-smart grid integrated systems face several issues related to communication, grid infrastructure and control in the future power system. Smart grid technologies are summarized in Section 2. The existing research articles in this area are classified into two based on the purpose: EVs integration into the electric grid and Vehicle to grid services. Finally, the research gaps and future scope of incorporating electric vehicles with renewable energy sources and the Smart grid are highlighted.
在世界范围内,交通运输领域的能源消耗仅次于工业消耗。如果交通运输完全由可再生能源驱动,化石燃料的使用可以大大减少,这将导致较少的温室气体排放。电动汽车(ev)可以作为一种替代方案,使交通运输无污染。电动汽车的大规模使用给供电系统带来了巨大的电力需求。这个问题可以通过利用可再生能源(RESs)为电动汽车充电来解决。由于RESs的不可预测性,电动汽车与其他负荷和可再生能源发电的协调充电是一个问题。利用电动汽车作为能量单元,可以补偿电网中的功率波动。本文综述了电动汽车与智能电网集成领域的最新研究进展。在未来的电力系统中,电动汽车-智能电网集成系统面临着通信、电网基础设施和控制等诸多问题。第二节对智能电网技术进行了总结。该领域已有的研究文章根据研究目的可分为电动汽车入网和车对网服务两大类。最后,强调了电动汽车与可再生能源和智能电网结合的研究差距和未来的范围。
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引用次数: 0
Performance optimization of flywheel using experimental design approach 用实验设计方法优化飞轮性能
Q2 Engineering Pub Date : 2022-06-22 DOI: 10.1515/ehs-2022-0007
Abdelbaki Abdallah, S. Bendaoudi, M. Bounazef
Abstract The flywheel is the simplest device for mechanical battery that can charge/discharge electricity by converting it into the kinetic energy of a rotating flywheel, and vice versa. The energy storage systems based on flywheel now arousing great interest, since this technology can offer great advantages in durability and lifetime. However, the flywheel performance rotation is limited by the strength of the materials, from which it is constructed, and the geometry. Greater control over those parameters could improve the development of high performance of a flywheel energy storage system (FESS). The main interest of this study is to demonstrate the influence degree of each parameter of geometry by using the mathematical method of design of experiments, in order to be able to optimize the adequate parameters for a high performed shape of the flywheel.
摘要飞轮是机械电池中最简单的装置,它可以将电能转化为旋转飞轮的动能进行充放电,反之亦然。基于飞轮的储能系统在耐久性和使用寿命方面具有很大的优势,引起了人们的极大兴趣。然而,飞轮的性能旋转是有限的材料的强度,从它是构造,和几何形状。更好地控制这些参数可以促进高性能飞轮储能系统(FESS)的发展。本研究的主要目的是利用实验设计的数学方法来证明各几何参数的影响程度,以便能够优化适当的参数以获得高性能的飞轮形状。
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引用次数: 0
Assessment and optimization of photovoltaic systems at the University Ibn Tofail according to the new law on renewable energy in Morocco using HOMER Pro 根据摩洛哥新的可再生能源法律,使用HOMER Pro对伊本托fail大学的光伏系统进行评估和优化
Q2 Engineering Pub Date : 2022-06-22 DOI: 10.1515/ehs-2022-0035
Chakib El Mokhi, Oumaima Choukai, H. Hachimi, Ahmed Ait Errouhi
Abstract The current study aims to investigate and optimize the photovoltaic systems currently in operation at the University of Ibn Tofail in Kenitra, Morocco. The University has started already since 2017 to integrate photovoltaic systems in the form of carports with the objective to reduce the invoices for electricity supplied from the utility grid by at least around 40%. Until then, the University avoided selling the energy surplus to the local electricity provider due to complicated bureaucratic regulations. However, due to the new law on renewable energy adopted by the Moroccan government in November 2021, it will be possible for private households and public service buildings to sell the entire excess of energy produced by renewable energy systems instead of only 20% of the surplus according to the previous law 13-09. For this purpose, this research project seeks to verify whether an expansion of the available photovoltaic installations and the sale of the energy surplus is worthwhile or not. This research work has been done with the optimization software HOMER Pro and presents the obtained optimized results and proposals of two new scenarios in comparison to already existing photovoltaic arrays.
当前的研究旨在调查和优化目前在摩洛哥Kenitra的Ibn Tofail大学运行的光伏系统。自2017年以来,该大学已经开始以车库的形式整合光伏系统,目标是将公用电网供电的发票减少至少40%左右。在此之前,由于复杂的官僚法规,该大学避免将剩余能源出售给当地电力供应商。然而,由于摩洛哥政府于2021年11月通过了新的可再生能源法,私人家庭和公共服务建筑将有可能出售可再生能源系统产生的全部多余能源,而不是根据之前的法律13-09只出售剩余的20%。为此目的,本研究项目试图验证是否值得扩大可用的光伏装置和出售剩余的能源。本研究工作使用优化软件HOMER Pro完成,并与现有光伏阵列进行对比,给出了两种新场景的优化结果和建议。
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引用次数: 5
Modelling, design and parametric analysis of a levitation based energy harvester 基于悬浮能量采集器的建模、设计和参数分析
Q2 Engineering Pub Date : 2022-06-21 DOI: 10.1515/ehs-2022-0034
Prajwal Kogodu Thirthappa, M. Krishnan
Abstract Levitation based energy harvester (LBEH) is an energy harvesting technology which is used to convert the existing kinetic energy into electrical energy. The technique utilizes a levitating magnet which in a closed container vibrate or moves for the subjected vibrations. An outer coil which will extract energy into electrical voltage is carefully selected or designed or the rating. In this research work, a conventional LBEH is designed, simulated, and studied for a particular vibration data. The same is carried out in the FEM analysis software. The system is also mathematically derived and analyzed in the numerical tool. The results obtained from the numerical and FEM tool are compared. At the end of the research work, a parametric study is carried out for the variations in the input characteristics such as frequency, nature of vibrations and other parameters. Results obtained indicate that the power developed is maximum with a value of 0.7 V and 10 mW for the designed natural frequency of 10 Hz and decreases on either side as the bandwidth varies from 5 to 15 Hz.
摘要基于悬浮的能量收集器(LBEH)是一种将现有动能转化为电能的能量收集技术。该技术利用悬浮磁铁,在一个封闭的容器中振动或移动。将能量转化为电压的外线圈是经过精心选择或设计的。在本研究中,针对特定的振动数据,设计、模拟和研究了传统的LBEH。在有限元分析软件中进行了同样的计算。并对系统进行了数学推导和数值分析。比较了数值分析和有限元分析的结果。在研究工作的最后,对输入特性(如频率、振动性质和其他参数)的变化进行了参数化研究。结果表明,在设计固有频率为10 Hz时,输出功率在0.7 V和10 mW时最大,随着带宽从5到15 Hz的变化,输出功率在两侧减小。
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引用次数: 0
Dispatchable power supply from beam down solar point concentrator coupled to thermal energy storage and a Stirling engine 可调度的电力供应从束下太阳能点集中器耦合到热能储存和斯特林发动机
Q2 Engineering Pub Date : 2022-06-06 DOI: 10.1515/ehs-2021-0053
A. Boretti, Ayman al Maaitah
Abstract A high concentration high-temperature beam down solar point concentrator is proposed, coupled to thermal energy storage and a Stirling engine to deliver fully dispatchable electricity over 24 h. Full 24 h operation at nominal power is permitted during the month of maximum solar energy collection while in the month of minimum solar energy collection, the full power production is limited to 17.06 h. The monthly average capacity factors oscillate between 71 and 100%, with an average of 87.5%. Thanks to an electric heater for the heat storage fluid, the system can accept excess electricity from the grid to compensate for the loss of the solar energy collected every other month versus the solar energy collected during the best summer month, to operate at rated power 24 h a day in every day of the year. In this case, the capacity factor can reach 100% every month. By further increasing the size of the thermal energy storage and the power of the engine, the electric thermal energy storage capability of the system can be enhanced, increasing the amount of electricity otherwise wasted that could be collected from the grid to be then returned when needed.
摘要:提出了一种高度集中的高温光束下太阳能聚光器,与热能存储和斯特林发动机耦合,在24小时内提供完全可调度的电力。在最大太阳能收集月份允许以标称功率满24小时运行,而在最小太阳能收集月份,满功率生产被限制为17.06小时。月平均容量因子在71 - 100%之间波动。平均为87.5%。由于蓄热流体的电加热器,该系统可以接受来自电网的多余电力,以补偿每隔一个月收集的太阳能与夏季最佳月份收集的太阳能的损失,从而在一年中的每一天24小时以额定功率运行。在这种情况下,每个月的容量系数可以达到100%。通过进一步增加热能储存的大小和发动机的功率,可以增强系统的电热能储存能力,从而增加可以从电网收集并在需要时返回的浪费电量。
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引用次数: 1
Evaluation of parameters influencing the performance of photovoltaic-thermoelectric (PV-TE) hybrid system 影响光伏-热电(PV-TE)混合系统性能的参数评价
Q2 Engineering Pub Date : 2022-04-25 DOI: 10.1515/ehs-2022-0015
M. El Mliles, H. Amiry, Y. El kouari, A. Hajjaji
Abstract This study analyzes the feasibility of the photovoltaic-thermoelectric (PV-TE) hybrid system and examines the appropriate parameters to optimize the design of the hybrid system. A new formula that sets a minimal working condition from which the output power of the hybrid system will exceed that of the PV cell alone at 298 K was developed. The experimental results showed that the hybrid system outperformed the PV cell alone at 298 K, once the minimal working condition is attained. Moreover, the results illustrated that we can enhance the performance with a slight change in the cold side temperature of the TE using PV cells with a relatively small temperature coefficient and efficiency. The results indicated also that the model can produce trustworthy predictions, consequently, it may be useful during the design of a hybrid system with optimized performance.
摘要分析了光伏-热电(PV-TE)混合系统的可行性,并研究了合适的参数来优化混合系统的设计。开发了一个新的公式,该公式设定了在298 K时混合系统的输出功率超过单独PV电池输出功率的最小工作条件。实验结果表明,一旦达到最小工作条件,混合系统在298 K下的性能优于单独的PV电池。此外,结果表明,我们可以使用温度系数和效率相对较小的PV电池,通过轻微改变TE的冷侧温度来提高性能。结果还表明,该模型能产生可靠的预测结果,可用于优化混合动力系统的设计。
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引用次数: 0
Multi-level energy efficient cooperative scheme for ring based clustering in wireless sensor network 无线传感器网络环聚类的多级节能协同方案
Q2 Engineering Pub Date : 2022-04-13 DOI: 10.1515/ehs-2021-0031
J. J. Sumesh, Maheswaran Chella Perumal
Abstract Wireless Sensor Network (WSN) is composed of different sensors attached to the same wireless medium. Sensor node data is usually forwarded to the base station, where it has been stored, evaluated, and processed. Ring Routing, a new energy-efficient distributed routing protocol aimed at larger-scale WSN applications with mobile sink and motionless sensor nodes. The structure ring is quickly converted, and they are capable of switching positions with regular nodes in a simple and effective manner, thereby minimizing the hotspot problem. In the network system, the central node is considered, and ring nodes with a certain distance are established while creating a ring structure. Since the sink nodes are powered by batteries, they deplete their batteries quicker than the other nodes, which is attributable to the accumulation of data traffic into the sink. Furthermore, when the ring configuration is disrupted due to ring node expiration, data transfer becomes tedious and causes significant delay. As a ring node starts to exhaust, its neighbor takes over as the ring node, and this selection of the regular node as the ring node is done optimally based on Multiple-Fitness Parameters such as Four-level energy consumption (4En), Distance (distance between the ring node and the regular node Dist ring − reg and distance between network centers to regular node Δ D i s t C − r i n g ${Delta}Dis{t}_{C-ring}$ ) and delay S. Moreover, this optimal selection of the regular node to act as ring node will be carried out by a new hybrid algorithm referred to as Cuckoo Search Updated Sealion’s Attacking Technique (CSUSAT) that combines the standard crow search and sea lion optimization algorithm. At last, the supremacy of the presented approach is proved over other models.
无线传感器网络(WSN)是由连接在同一无线介质上的不同传感器组成的网络。传感器节点数据通常被转发到基站,在那里进行存储、评估和处理。环路由是一种新的高效节能的分布式路由协议,主要针对具有移动sink和静止传感器节点的大规模WSN应用。结构环转换速度快,能够简单有效地与规则节点交换位置,从而最大限度地减少热点问题。在网络系统中,在创建环形结构时考虑中心节点,建立一定距离的环形节点。由于汇聚节点由电池供电,因此它们比其他节点更快地耗尽电池,这是由于数据流量积累到汇聚节点。此外,当环节点过期导致环配置中断时,数据传输将变得繁琐,并导致严重的延迟。作为环节点开始排气,邻国接管环节点,这选择普通节点的节点环做四级能耗优化基于Multiple-Fitness参数如(4),距离(距离环节点和普通节点距离环−reg和网络之间的距离中心常规节点ΔD我s t C−r n g ${三角洲}说{t} _ {C - r} $)和延迟s .此外,这种常规节点作为环节点的最优选择将通过一种新的混合算法来实现,该算法将标准乌鸦搜索和海狮优化算法相结合,称为布谷鸟搜索更新海狮攻击技术(CSUSAT)。最后,证明了该方法相对于其他模型的优越性。
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引用次数: 0
期刊
Energy Harvesting and Systems
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