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2020 4th International Conference on Energy Material, Chemical engineering and Mining engineering, EMCEME 2020

作者： Wang, Zecheng Li, Xin School of Energy and Power Engineering Wuhan University of Technology Wuhan430063 China Key Lab. of Marine Power Engineering and Tech

The hybrid energy storage system's allocation problem is a multi-target and multi-direction optimization problem. Single-objective allocation for the marine Hybrid Energy Storage System (MHESS) cannot help the hybrid energy storage system unit give play to its optimal effect. A diesel-electric hybrid ship is used as the object. In this paper, a mathematical model of a hybrid energy storage device is established, and multi-objective optimization allocation is performed on the model based on the NSGA-II. Finally, the optimized model is applied to a ship, and eleven kinds of batteries and six supercapacitors are selected for simulation. The simulation results show the relationship between the objective functions. © 2021 Published under licence by IOP Publishing Ltd.

关键词： Ships

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Wind Speed Estimation for PMSG-Based WECS under power Limit Control 6

Wind Speed Estimation for PMSG-Based WECS under Power Limit ...

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6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Chen, Wei Yang, Wenbin Chen, Qing Li, Jingyi Geng, Hua Power China Huadong Engineering Co. Ltd. Key Lab. of Far-shore Wind Power Tech. of Zhejiang Prov. Hangzhou311122 China Tsinghua University Department of Automation Beijing100084 China

ISBN: (纸本)9798350346671

Availab.lity of real-time wind speed information is important for the control of the wind energy conversion system (WECS). Conventionally, the wind speed estimation can be achieved by considering the motion equation of rotator of wind turbine. However, under the power limit control, the rotor speed easily reaches the maximum, making the wind speed estimation more difficult. In this paper, an effective estimation method of wind speed for the PMSG-based WECS under the power limit control is proposed, which approximates the nonlinear relation between the pitch angle and wind speed in the case of rotor speed reaching the maximum value. The proposed method adopts the polynomial function to describe the numerically solved relation between the pitch angle and wind speed, with considering different power limit references. As a result, the pitch angle is utilized to estimate the real wind speed when the rotor speed reaches the maximum. Finally, case studies are carried out to validate the proposed method. © 2023 IEEE.

关键词： Equations of motion

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Particle Emissions from Intelligent Charge Compression Ignition Engine: Properties and Main Influencing Factors

SSRN

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SSRN 2023年

作者： Qian, Yong Mi, Shijie Ju, Dehao Zhou, Dezhi Huang, Li Lu, Xingcai Key Lab. for Power Machinery and Engineering of M. O. E. Shanghai Jiao Tong University Shanghai200240 China National Key Laboratory of Marine Engine Science and Technology Shanghai201108 China

Based on the dual direct injection strategy, the intelligent charge compression ignition (ICCI) engine has been proven to achieve ultra-high efficiency. The dual direct injection of binary fuel results in a more complex particle generation mechanism from the ICCI engine. This paper systematically analyzes the effects of engine load, fuel injection strategy, intake conditions, and the properties of low-reactivity fuels (LRF) on particle emissions from the ICCI engine. The results indicate that a high proportion of LRF with early injection during the intake stroke leads to a high concentration of nucleation mode particles. Furthermore, when the injection timing of gasoline is delayed to 280 degrees before top dead center (oCA BTDC), the concentration of accumulation mode particles noticeably increases. Through the implementation of double gasoline injections, it is possible to restrict the maximum concentration of nucleation and accumulation mode particles to below 107/cm3. When the diesel injection timing was advanced to 60 oCA BTDC, the accumulation mode particles could be suppressed. The high intake pressure results in an extreme high nucleation mode particle. Under 40% EGR, there is a significant increase in accumulation mode particles. Using methanol as LRF proves effective in inhibiting particle emissions. Through principal component analysis, it is evident that optimizing dual direct injection strategies can effectively reduce particle emissions. Employing oxygenated fuels as LRF proves to be the most efficient method for reducing particle emissions of ICCI engine. © 2023, The Authors. All rights reserved.

关键词： Direct injection

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Wind Speed Estimation for PMSG-Based WECS under power Limit Control

Wind Speed Estimation for PMSG-Based WECS under Power Limit ...

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China International Electrical and Energy Conference (CIEEC)

作者： Wei Chen Wenbin Yang Qing Chen Jingyi Li Hua Geng Key Lab. of Far-shore Wind Power Tech. of Zhejiang Prov. Power China Huadong Engineering Co. Ltd. Hangzhou China Department of Automation Tsinghua University Beijing China

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Research on Multi-objective Optimization of Capacity Allocation for marine Hybrid Energy Storage System

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IOP Conference Series: Earth and Environmental Science 2021年第2期692卷

作者： Zecheng Wang Xin Li School of Energy and Power Engineering Wuhan University of Technology Wuhan 430063 China Key Lab. of Marine Power Engineering and Tech. authorized by MOT

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Backhaul-aware Drone Base Station Placement and Resource Management for FSO-based Drone-assisted Mobile Networks

arXiv

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arXiv 2021年

作者： Yu, Liangkun Sun, Xiang Shao, Sihua Chen, Yougan Albelaihi, Rana The SECNet Lab. University of New Mexico AlbuquerqueNM87131 United States The Department of Electrical Engineering New Mexico Tech SocorroNM87801 United States The Key Laboratory of Underwater Acoustic Communication and Marine Information Technology Xiamen University Ministry of Education Xiamen361005 China

In drone-assisted mobile networks, Drone-mounted Base Stations (DBSs) are responsively and flexibly deployed over any Places of Interest (PoI), such as sporadic hotspots and disaster-struck areas, where the existing mobile network infrastructure is unable to provide wireless coverage. In this paper, a DBS is an aerial base station to relay traffic between a nearby Macro Base Station (MBS) and the users. In addition, Free Space Optics (FSO) is applied as the backhauling solution to significantly increase the capacity of the backhaul link between an MBS and a DBS. Most of the existing DBS placement solutions assume the FSO-based backhaul link provides sufficient link capacity, which may not be true, especially when a DBS is placed far away from an MBS (e.g., > 10 km in disaster-struck areas) or in a bad weather condition. In this paper, we formulate a problem to jointly optimize bandwidth allocation and DBS placement by considering the FSO-based backhaul link capacity constraint. A Backhaul awaRe bandwidth allOcAtion and DBS placement (BROAD) algorithm is designed to efficiently solve the problem, and the performance of the algorithm is demonstrated via extensive simulations. © 2021, CC BY.

关键词： Drones

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Efficient electricity generation and degradation of organic pollutants in wastewater using Ag-BiOI photoactivated fuel cell

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作者： He, Chun Gong, Yibing Li, Shuzhen Hu, Lingling Yang, Yichang Sun, Lianpeng Shu, Dong School of Environmental Science and Engineering Sun Yat-sen University Guangzhou510275 China Key Lab. of Tech. on Electrochem. Energy Storage and Power Generation in Guangdong Universities School of Chemistry and Environment South China Normal University Guangzhou510006 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou510275 China

ISBN: (纸本)9780841230149

A visible-light-driven photo fuel cell (PFC) system, consisting of a Ag-BiOI/ITO photoanode and a Pt photocathode, was used to generate electricity by using wastewater organic compounds as electrolyte and fuel. The prepared BiOI and Ag-BiOI/ITO photoanodes were characterized by X-ray diffraction (XRD), scanning electronic microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectroscopy (DRS) to examine the surface structure, chemical composition, and the properties of light absorption. The photoactivity of Ag-BiOI/ITO photoanodes was evaluated in the term of the electricity generation efficiency and degradation efficiency for recalcitrant organic pollutants. Compared with a BiOI/ITO photoanode, it was found that the efficiency of electricity generation using the Ag-BiOI/ITO photoanode was significantly higher in PFC system under visible light. Similarly, the photocatalytic degradation efficiency of wastewater organic pollutants using Ag-BiOI/ITO photoanode was significantly higher than that © 2014 American Chemical Society.

关键词： Bismuth compounds

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Thermodynamic analysis of the integrated waste heat recovery system for power plant

Thermodynamic analysis of the integrated waste heat recovery...

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4th International Conference on Manufacturing Science and technology, ICMST 2013

作者： Zhang, Chang Shun Xu, Gang Liu, Tong Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation School of Energy Power and Mechanical Engineering North China Electric Power University Beijing 102206 China Key Lab. of Low-grade Energy Utili. Tech. and Sys. of Ministry of Edu. of China Chongqing University Chongqing 400044 China

ISBN: (纸本)9783037858677

The thermal loss from the exhaust flue gas accounts for a large proportion of the thermal loss in the boiler. Under the pressure from the strict emission reduction policy and the rising fuel price, how to improve the fuel utilization ratio and reduce the coal consumption rate is of great significance in the electric industry. Based on the conventional waste heat recovery system, this paper proposes an integrated waste heat recovery system in reference with the German Niederaussem power generation unit. The integrated system improves the fuel utilization ratio and effectively utilize the waste heat with great economic benefits. © (2013) Trans tech Publications, Switzerland.

关键词： Waste heat utilization

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Research on structured light 3D measurement using color strip edge and center coding

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Journal of Convergence Information technology 2012年第10期7卷 314-321页

作者： Li, Xin Yu, Xiao-Yang Wang, Yang Wu, Hai-Bin Fu, Kun-Kun Harbin Marine Boiler and Turbine Research Institute Harbin China Higher edu. Key lab. for Measuring and Control Tech. and Instrumentations of Heilongjiang province Harbin University of Science and Technology Harbin 150080 China College of Aerospace Engineering and Applied Mechanics Tongji University Shanghai China

To improve the sampling density and the sampling speed of the structured light 3D measurement, the spatiotemporal projection patterns of two color stripes were introduced in this paper. Both of projection patterns were spatial coding with the color strips, and within two patterns were time coding. The 3D measurement was achieved by projecting only these two patterns. And a novel code-encoding method based on the stripe center and edge was proposed. The strip centers were obtained by conventional approach as the sample points, and at the same time the strip edge was also detected as the sample points. The sample density of 3D measurement was increased by all sample points. Computer simulation shows that plane, spherical and irregular surface can be measured and reconstructed with the help of 3dsmax software. In addition, 3D measurement and reconstruction trials were implemented on the experimental appliance of turbine blade. It has demonstrated that the proposed spatiotemporal projection patterns can enhance the measurement efficiency and the accuracy, while the strip center and edge code-encoding methodology can achieve the sampling in 80ms and increase the sampling density twice.

关键词： Turbomachine blades

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