Journal of Nuclear Energy Science and Power Generation Technology最新文献_第9页

New Electrocatalysts Prepared by Co-Sputter Deposition for the Direct Oxidation of Methanol 共溅射沉积制备新型甲醇直接氧化电催化剂

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-05-25 DOI: 10.21926/jept.2103038

D. Fang, S. Narayan

引用次数: 0

Ion Transport in Organic Electrolyte Solutions for Lithium-ion Batteries and Beyond 锂离子电池及其他用途有机电解质溶液中的离子传输

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-05-24 DOI: 10.21926/jept.2103043

A. Karatrantos, Sharif Khan, Chuanyu Yan, R. Dieden, K. Urita, T. Ohba, Q. Cai

引用次数: 4

Synthetical Optimal Design for Passive-Damped LCL Filters in Islanded AC Microgrid 孤岛交流微电网无源阻尼LCL滤波器的综合优化设计

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-05-19 DOI: 10.21926/jept.2103032

Xiuhui Tang, Daming Zhang, Hua Chai

引用次数: 3

A Comparative Study of Structural, Optical and Electrical Properties of Fe-ZnO Nanoparticles Synthesized by Precipitation and Microwave Method for Photovoltaic Applications 沉淀法和微波法制备的铁氧化锌纳米颗粒的结构、光学和电学性能的比较研究

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-05-12 DOI: 10.21926/jept.2103035

Ganga R. Neupane, A. Kaphle, D. Mcllroy, E. Echeverria, P. Sankaran, P. Hari

{"title":"A Comparative Study of Structural, Optical and Electrical Properties of Fe-ZnO Nanoparticles Synthesized by Precipitation and Microwave Method for Photovoltaic Applications","authors":"Ganga R. Neupane, A. Kaphle, D. Mcllroy, E. Echeverria, P. Sankaran, P. Hari","doi":"10.21926/jept.2103035","DOIUrl":"https://doi.org/10.21926/jept.2103035","url":null,"abstract":"Iron doped ZnO (Fe-ZnO) nanoparticles were synthesized using two techniques that are economical as well as scalable to yield tunable properties of nanoparticles for facilitating down conversion in an absorbing layer of a solar cell. To evaluate the suitability of Fe-ZnO nanoparticles prepared by two deposition methods, we present a comparison of optical, electrical, and structural properties of Fe-ZnO using several experimental techniques. Structural properties were analyzed using transmission electron microscopy and x-ray diffraction spectroscopy (XRD) with Rietveld analysis for extracting information on compositional variations with Fe doping. The chemical composition of nanoparticles was analyzed through X-ray photoelectron spectroscopy (XPS). The optical properties of nanoparticles were studied using photoluminescence and UV-Vis absorption spectroscopy. In addition, fluorescence lifetime measurement was also performed to study the changes in an exponential decay of lifetimes. The electrical transport properties of Fe-ZnO were analyzed by impedance spectroscopy. Our studies indicate that ethanol as a solvent in a microwave method would produce smaller nanoparticles up to the size of 11 nm. In contrast, the precipitation method produces secondary phases of Fe2O3 beyond 5% doping. In addition, our studies show that the optical and electrical properties of resulting Fe-ZnO nanoparticles depend on the particle sizes and the synthesis techniques used. These new results provide insight into the role of solvents in fabricating Fe-ZnO nanoparticles by precipitation and microwave methods for photovoltaic and other applications.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81690124","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 Highly-efficiency Position Sensorless Electric Vehicle Synchronous Reluctance Motor Drive 一种高效的无位置传感器电动汽车同步磁阻电机驱动

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-05-02 DOI: 10.21926/jept.2103037

C. Liaw, G. V. Kumar, Min-Ze Lu

{"title":"A Highly-efficiency Position Sensorless Electric Vehicle Synchronous Reluctance Motor Drive","authors":"C. Liaw, G. V. Kumar, Min-Ze Lu","doi":"10.21926/jept.2103037","DOIUrl":"https://doi.org/10.21926/jept.2103037","url":null,"abstract":"The development of high-efficiency motor drives for various applications is important in the industry 4.0 era, especially for their extensive application to electric vehicles (EVs). In this study, a position sensorless EV synchronous reluctance motor (SynRM) drive has been developed, which exhibits good driving performance and efficiency over a wide speed and load range. To solve the key problems popularly encountered in the existing approaches, the high-frequency injection (HFI) scheme based on q-axis injection has been proposed. In addition, the changed-frequency injection has been adopted considering the effects of speed/load dependent slotting ripple current. Robust observed speed and position controllers have been added to enhance the sensorless control performance. For the SynRM basic driving control scheme, robust current control and adaptive commutation with minimized motor losses have been achieved that yield satisfactory driving performance up to the rated speed and load. Good EV driving performance has been demonstrated experimentally, including starting, dynamic, acceleration/deceleration, and reversible operations. In addition, the steady-state characteristics have been assessed, and the high efficiencies have been observed to be comparable to the standard drive.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80693665","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

Maintenance Optimization of Wind Turbines Using Weather-Dependent Equivalent Age Model 基于天气相关等效年龄模型的风力发电机维修优化

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-04-26 DOI: 10.21926/jept.2103036

Ali Aldubaisi, J. Valenzuela

{"title":"Maintenance Optimization of Wind Turbines Using Weather-Dependent Equivalent Age Model","authors":"Ali Aldubaisi, J. Valenzuela","doi":"10.21926/jept.2103036","DOIUrl":"https://doi.org/10.21926/jept.2103036","url":null,"abstract":"Aging models are important input into wind farm maintenance and financial viability models. Aging of wind turbines depends on many factors, including both ambient and usage conditions. This paper presents a virtual age based maintenance model for wind turbines considering the effect of wind speed and ambient air temperature on turbine aging. Two maintenance thresholds (i.e., corrective threshold and preventive threshold) and three repair actions (i.e., unscheduled corrective, scheduled corrective and preventive actions) are integrated into the maintenance model. The objective is to determine the optimal thresholds values that minimize the expected total maintenance costs. A discreet time simulation model is developed to produce 20 years of weather and usage scenarios for a single onshore wind turbine. The optimization model is formulated as a mixed-integer nonlinear problem and solved using the Nelder–Mead method. A numerical example is presented to highlight the benefits of the proposed approach. Compared with traditional age-based maintenance, the proposed approach can achieve improvement in both availability and costs. The results show up to 50% reduction in maintenance cost as well as the significance of the effects of wind speed and ambient air temperature in maintenance planning.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75616459","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

Performance Investigation of a Nickel Cermet Anode Modified with Copper, Alkaline Earth Metal Oxide, Boron, and Perovskite for Direct Methane Fuel Cell 直接甲烷燃料电池用铜、碱土金属氧化物、硼和钙钛矿改性镍金属陶瓷阳极的性能研究

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-04-26 DOI: 10.21926/JEPT.2102024

A. Chien, E. Lin, Nicole J. Ye

{"title":"Performance Investigation of a Nickel Cermet Anode Modified with Copper, Alkaline Earth Metal Oxide, Boron, and Perovskite for Direct Methane Fuel Cell","authors":"A. Chien, E. Lin, Nicole J. Ye","doi":"10.21926/JEPT.2102024","DOIUrl":"https://doi.org/10.21926/JEPT.2102024","url":null,"abstract":"The metallic copper, alkaline earth metal oxide, boron, and perovskite were incorporated on the surface of a Ni-cermet anode, and the performance of the modified Solid Oxide Fuel Cell (SOFC) anode was evaluated. The cell performance was analyzed by voltage-current characteristics (V-I curve) and H2-CH4 step reactions (P-t curve) in a potentiostatic mode. Besides, we also determined if a metallic phase or high electronic conductivity of the anode is important for a cell to perform well when H2 is used as a fuel, whereas both conductivity and anti-coking capability are critical while using CH4 as a fuel. The results showed that the anodes containing magnesium oxide (MgO), lanthanum strontium titanate (La0.4Sr0.4TiO3−γ), and boron were relatively resistant to the degradation in the CH4 environment when compared with others. The underlying mechanism varied mainly with electronic and structural promotion by the dopants as well as their material compatibility with the Ni-cermet substrate. These findings were evidenced and supported by surface analysis as well as in-situ infrared and mass spectroscopic studies too.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76628024","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

A Review on the Application of the MPC Technology in Wind Power Control of Wind Farms MPC技术在风电场风力控制中的应用综述

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-04-23 DOI: 10.21926/jept.2103033

Chenchang Li, Jianqiang Hu, Jie Yu, Jieci Xue, Runze Yang, Bolin Sun, Yijie Fu

{"title":"A Review on the Application of the MPC Technology in Wind Power Control of Wind Farms","authors":"Chenchang Li, Jianqiang Hu, Jie Yu, Jieci Xue, Runze Yang, Bolin Sun, Yijie Fu","doi":"10.21926/jept.2103033","DOIUrl":"https://doi.org/10.21926/jept.2103033","url":null,"abstract":"Due to the uncertainty and volatility of wind speed, its natural output power also exhibits strong volatility. In order to avoid the negative effects of the excessive fluctuation of the output power of wind turbines in the wind farm and the power grid, it is very important to accurately predict and reasonably plan and control the output power of the wind farm. Model predictive control (MPC) is a type of advanced control method that can deal with a multi-input multi-output nonlinear system. Compared to the traditional proportional integral derivative control, MPC is more suitable for the complex wind farm model and exhibits good control performance, and has been gradually applied to control the wind power in wind farms. In this article, we have summarized the application of the MPC technology in the prediction and control of wind power in a wind farm, analyze the application of the MPC technology, including MPC, multi-objective MPC, nonlinear MPC, and distributed MPC, in the wind farm power control with different optimization objectives. In addition, the optimization of the active and reactive power of wind farms has also been discussed in detail. Furthermore, some hot topics in the current research, such as the multi-objective optimization problem of coordinating the maximum power and reducing the fatigue load and power smoothing control problem, have been summarized. Finally, the existing problems of MPC applied to wind power systems have been discussed.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87542010","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

Energy Storage and Installed Wind Capacity Requirements for the Substitution of Fossil Fuels in the Electricity Generation Sector 发电行业替代化石燃料的储能和风力发电装机容量要求

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-04-19 DOI: 10.21926/jept.2103040

E. Michaelides

{"title":"Energy Storage and Installed Wind Capacity Requirements for the Substitution of Fossil Fuels in the Electricity Generation Sector","authors":"E. Michaelides","doi":"10.21926/jept.2103040","DOIUrl":"https://doi.org/10.21926/jept.2103040","url":null,"abstract":"The impending adverse effects of Global Climate Change encourages the substitution of fossil fuels with non-carbon sources for electricity generation. However, while fossil fuel power plants may generate electric power at demand, the most abundant renewable energy sources–wind and solar–are intermittent or periodically variable. This necessitates the development of adequate energy storage at the utility/grid level. Using actual data for the hourly energy demand in the ERCOT electricity grid, this study examines the electricity supply-demand equilibrium and determines the necessary energy storage capacity for the substitution, first, of the coal power plants and, secondly, of all the fossil fuel power plants. The calculations show that, if the natural gas, intermediate-load power plants continue to be available, all coal units may be substituted with wind farms without the need for energy storage. When all the fossil fuel units are to be substituted, significant energy storage capacity is required, approximately 45.3 million m3. The calculations also show that the further development of nuclear energy and additional solar energy units reduce the requirements for energy storage and, also lessen the energy dissipation in the storage-recovery process.","PeriodicalId":53427,"journal":{"name":"Journal of Nuclear Energy Science and Power Generation Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83815707","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: 4

Estimating Met-Ocean Parameters during a Tropical Cyclone for Marine Science and Engineering 热带气旋期间海洋参数的海洋科学与工程估算

Journal of Nuclear Energy Science and Power Generation Technology Pub Date : 2021-04-16 DOI: 10.21926/JEPT.2102025

S. Hsu

引用次数: 2