检索结果-南通市图书馆

Experimental study on hybridization of a PV–TEG system for electrical performance enhancement using heat exchangers,energy,exergy and economic levelized cost of energy(LCOE)analysis

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2023年第4期7卷 808-823页

作者： Mohammed A.Qasim Vladimir I.Velkin sergey E.Shcheklein Nuclear Power Plants and Renewable Energy Sources Department Ural Federal University620002 YekaterinburgRussia Department of Projects and Engineering Services Ministry of HealthBaghdad 10047Iraq

The concept of employing thermoelectric generators(TEGs)to recover energy from waste heat has gained popularity,with applications that range from milliwatt to kilowatt levels of output *** this study,a hybrid photovoltaic panel and thermoelectric generator(HPVTEG)system consisting of an integrated heat exchanger,a commercial polycrystalline silicon photovoltaic(PV)panel and a commercial bismuth telluride TEG was ***,TE components can be used to cool PV modules,increasing their output power via the Seebeck *** main finding is that the hybrid system has a reduced average temperature of 16.01°*** average power of the stand-alone PV panel is 28.06 W,but that of the HPVTEG system is 32.76 W,which is an increase of 4.7 *** conversion efficiency and power of the hybrid system increased by 16.7%and 16.4%,respectively,compared with a stand-alone PV *** HPVTEG system achieved an average exergy efficiency of 12.79%compared with 10.98%for a stand-alone PV *** to the calculation results,the levelized cost of energy(LCOE)of the stand-alone PV panel can range from 0.06741 to 0.10251 US$/kWh depending on how many days it is in operation,while the LCOE of the HPVTEG system can range from 0.06681 to 0.10160 US$/kWh.

关键词： PV TEG waste heat hybrid system heat exchanger

Coarsening kinetics and strengthening mechanisms of core-shell nanoscale precipitates in Al-Li-Yb-Er-Sc-Zr alloy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2021年第2期61卷 197-203页

作者： Yang Wang Shun Zhang Ruizhi Wu Nodir Turakhodjaev Legan Hou Jinghuai Zhang sergey Betsofen Key Laboratory of Superlight Materials&1 Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin 150001China College of Science Heihe UniversityHeihe 164300China Department of Machine Building Tashkent State Technical UniversityTashkent 100056Uzbekistan Moscow Aviation Institute National Research UniversityMoscow 109383Russia

The tailored nanoparticles with a complex core/shell structure can satisfy a variety of demands, such as lattice misfit, shearability and coarsening resistance. In this research, core-shell nanoscale Al3(Yb, Er, Sc,Zr, Li) composite particles were precipitated in Al-2 Li-0.1 Yb-0.1 Er-0.1 Sc-0.1 Zr(wt%) alloy through the double-aging treatment, in which the core was(Yb, Er, Sc, Zr)-rich formed at 300°C and the shell was Li-rich formed at 150°C. The coarsening kinetics and precipitate size distributions(PSDs) of Al3(Yb, Er, Sc,Zr, Li) particles aged at 150°C previously aged at 300°C for 24 h showed a better fit to the relation of 2∝ kt and normal distribution, indicating that the coarsening of precipitates was controlled by interface reaction, not diffusion. The Orowan bypass strengthening was operative mechanism at 150°C.

关键词： Al-Li alloys Aging Core-shell structure Coarsening kinetics Strengthening mechanisms

Investigation into the operation of an autothermal two-section subbituminous coal fluidized bed gasifier

在线全文

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2023年第3期10卷 190-203页

作者： Nikolay Abaimov Alexander Ryzhkov Alexey Dubinin Lu Ding Vladimir Tuponogov sergey Alekseenko Ural Federal University EkaterinburgRussia 6200022 Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China Institute of Thermophysics Siberian BranchRussian Academy of SciencesNovosibirskRussia 630090

Using a newly developed experimental setup,the features and advantages of an autothermal single-casing atmospheric sub-bituminous coal fluidized bed air-blown gasifier,combining a combustion and gasification section,and mixing the dispersed phase(inert material,char)and heat exchange between them through an annular transfer device,have been *** increase the efficiency of the gasifier,an experimental-computational method was developed find the conditions for optimal operation,combining changing the annular flow's geometry and regulating the primary air for gasification.A simple and reliable multizone thermodynamic calculation model makes it possible to predict the composition of char and syngas in the gasification section with acceptable *** method confirmed that a two-section fluidized bed gasifier can provide efficient gasification of solid fuels and is suitable for use in small-scale cogeneration *** with a heating value of 3.6-4.5 MJ/m^(3)and CGE of 38.2%-42.3%was obtained in the experimental setup without optimizing the primary air flow *** optimization,the indicators increased to the heating value of syngas of 5.20-5.34 MJ/m^(3)and CGE of 42.5%-50.0%.With heat regeneration of 0.8,CGE increases to 70%.

关键词： Coal Syngas Gasification Bubbling fluidized bed Thermodynamics Modeling

Inter-correlation between Sunspot Oscillations and Their Internal Structures

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2022年第11期22卷 97-106页

作者： Libo Fu Zizhan Zhu Ding Yuan Jiaoyang Wang Song Feng sergey Anfinogentov Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518055China Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunming 650500China Institute of Solar-Terrestrial Physics SB RAS Lermontov st.126a664033IrkutskRussia

Three-and five-minute oscillations are commonly observed in any *** they are modulated by the internal thermal and magnetic structures of a sunspot,they could be used as an effective tool for researching sunspot *** this paper,we investigate the properties of oscillations in sunspot groups with varying sizes and magnetic fields,and aim to establish the relationships between sunspot oscillations and its internal structure *** selected three groups of the unipolar sunspot with approximately axial-symmetric magnetic field and calculated their Fourier spectra based on the ultraviolet/extreme ultraviolet emission intensity variations recorded by the Solar Dynamics Observatory/Atmospheric Imaging *** found that the distribution of three-minute oscillation is defined by the joint effect of diverging magnetic field and the stratification of the sunspot *** distribution could be modified by any invading magnetic structures in the *** contrast,the five-minute oscillations are more prominent in small spots,implying that five-minute oscillation is very closely connected with umbral dynamics.

关键词： (Sun:)sunspots Sun:oscillations methods:data analysis

Electrical Excitation of Long-Range Surface Plasmons in PC/OLED Structure with Two Metal Nanolayers

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2020年第3期12卷 69-76页

作者： Valery Konopsky Valery Prokhorov Dmitry Lypenko Artem Dmitriev Elena Alieva Giovanni Dietler sergey Sekatskii Institute of Spectroscopy Russian Academy of SciencesFizicheskaya5TroitskMoscowRussia 108840 Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences Leninsky pr.31/4MoscowRussia 119071 Laboratoire de Physique de La Matière Vivante IPHYSEcole Polytechnique Fédérale de Lausanne1015 LausanneSwitzerland

A current-driven source of long-range surface plasmons(LRSPs)on a duplex metal nanolayer is *** excitation of LRSPs was experimentally observed in a planar structure,where an organic light-emitting film was sandwiched between two metal nanolayers that served as *** achieve the LRSP propagation in these metal nanolayers at the interface with air,the light-emitting structure was bordered by a one-dimensional photonic crystal(PC)on the other *** dispersion of the light emitted by such a hybrid PC/organic-light-emitting-diode structure(PC/OLED)comprising two thin metal electrodes was obtained,with a clearly identified LRSP resonance peak.

关键词： Surface plasmons Photonic crystal waveguides Light-emitting polymers

Advances in femtosecond laser direct writing of fiber Bragg gratings in multicore fibers:technology,sensor and laser applications

在线全文

学校读者我要写书评

暂无评论

Opto-Electronic Advances 2022年第4期5卷 48-68页

作者： Alexey Wolf Alexander Dostovalov Kirill Bronnikov Mikhail Skvortsov Stefan Wabnitz sergey Babin Novosibirsk State University Novosibirsk 630090Russia Institute of Automation and Electrometry of the SB RAS Novosibirsk 630090Russia Department of Information Electronics and Telecommunications EngineeringSapienza University of RomeRome 00184Italy

In this article,we review recent advances in the technology of writing fiber Bragg gratings(FBGs)in selected cores of multicore fibers(MCFs)by using femtosecond laser *** writing technology of such a key element as the FBG opens up wide opportunities for the creation of next generation fiber lasers and sensors based on *** advantages of the technology are shown by using the examples of 3D shape sensors,acoustic emission sensors with spatially multiplexed channels,as well as multicore fiber Raman lasers.

关键词： multicore fiber fiber Bragg grating femtosecond laser micromachining fiber laser fiber sensor

Accumulation of dysprosium,samarium,terbium,lanthanum,neodymium and ytterbium by Arthrospira platensis and their effects on biomass biochemical composition

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2021年第9期39卷 1133-1143页

作者： Inga Zinicovscaia Liliana Cepoi Ludmila Rudi Tatiana Chiriac Dmitrii Grozdov sergey Pavlov Svetlana Djur Joint Institute for Nuclear Research 6 Joliot-Curie Str.1419890DubnaRussia Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering 30 Reactorului Str.MG-6BucharestMagureleRomania Institute of Microbiology and Biotechnology 1 Academiei Str.202&ChisinauMoldova State University "Dimitrie Cantemir"3/2 Academiei Str.2028ChisinauMoldova

The growth of Arthrospira platensis and physiological changes in biomass under the effects of six rare earth elements Dy,Sm,Tb,La,Nd and Yb were *** were tested by three concentrations of 10,20 and 30 mg/*** to neutron activation analysis data ***’s accumulation capacity toward studied elements changes in the following order of La>Dy>Nd>Sm>Yb>*** results show that Dy and La ions stimulate biomass growth and Yb ions inhibit it,while Sm,Tb and Nd ions do not affect biomass *** contents of proteins and chlorophyll a are not affected by the presence of rare earth elements in the cultivation *** elements affect to different extents carbohydrates,phycobilins,β-carotene,lipids and MDA contents in spirulina *** in the antioxidant activity under applied metal loads reveal a moderate stress in exposed *** *** can be successfully used for bioremediation of natural water contaminated with REEs as well as REEs recovery from low polluted industrial effluents.

关键词： Rare earth elements Arthrospira platensis Biochemical composition Antioxidant activity Neutron activation analysis

A Data-Driven Rutting Depth Short-Time Prediction Model With Metaheuristic Optimization for Asphalt Pavements Based on RIOHTrack

在线全文

学校读者我要写书评

暂无评论

自动化学报:英文版 2023年第10期10卷 1918-1932页

作者： Zhuoxuan Li Iakov Korovin Xinli Shi sergey Gorbachev Nadezhda Gorbacheva Wei Huang Jinde Cao School of Mathematics Southeast UniversityNanjing 210096China Scientific Research Institute of Multiprocessor Computer Systems Southern Federal UniversityTaganrog 347928Russia School of Cyber Science and Engineering Southeast UniversityNanjing 210096China Russian Academy of Engineering Moscow 125009Russia Intelligent Transportation System Research Center Southeast UniversityNanjing 210096China Nanjing Modern Multimodal Transportation Laboratory Nanjing 211100China Yonsei Frontier Laboratory Yonsei UniversitySeoulKorea(South)

Rutting of asphalt pavements is a crucial design criterion in various pavement design guides. A good road transportation base can provide security for the transportation of oil and gas in road transportation. This study attempts to develop a robust artificial intelligence model to estimate different asphalt pavements’ rutting depth clips, temperature, and load axes as primary characteristics. The experiment data were obtained from19 asphalt pavements with different crude oil sources on a 2.038km long full-scale field accelerated pavement test track(Road Track Institute, RIOHTrack) in Tongzhou, Beijing. In addition,this paper also proposes to build complex networks with different pavement rutting depths through complex network methods and the Louvain algorithm for community detection. The most critical structural elements can be selected from different asphalt pavement rutting data, and similar structural elements can be found. An extreme learning machine algorithm with residual correction(RELM) is designed and optimized using an independent adaptive particle swarm algorithm. The experimental results of the proposed method are compared with several classical machine learning algorithms, with predictions of average root mean squared error(MSE), average mean absolute error(MAE), and a verage mean absolute percentage error(MAPE) for 19 asphalt pavements reaching 1.742, 1.363, and 1.94% respectively. The experiments demonstrate that the RELM algorithm has an advantage over classical machine learning methods in dealing with non-linear problems in road engineering. Notably, the method ensures the adaptation of the simulated environment to different levels of abstraction through the cognitive analysis of the production environment parameters. It is a promising alternative method that facilitates the rapid assessment of pavement conditions and could be applied in the future to production processes in the oil and gas industry.

关键词： Extreme learning machine algorithm with residual correction(RELM) metaheuristic optimization oil-gas transportation RIOHTrack,rutting depth

维普期刊数据库博看期刊

Energy stored in nanoscale water capillary bridges formed between chemically heterogeneous surfaces with circular patches

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第11期29卷 44-51页

作者： Bin-Ze Tang Xue-Jia Yu sergey V.Buldyrev Nicolas Giovambattista Li-Mei Xu International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Department of Physics Yeshiva University500 West 185th StreetNew YorkNY 10033United States Department of Physics Brooklyn College of the City University of New YorkBrooklynNew York 11210United States Ph.D.Programs in Chemistry and Physics The Graduate Center of the City University of New YorkNew YorkNY 10016United States Collaborative Innovation Center of Quantum Matter Beijing 100871China

The formation of nanoscale water capillary bridges(WCBs) between chemically heterogeneous(patchy) surfaces plays an important role in different scientific and engineering applications, including nanolithography, colloidal aggregation, and bioinspired adhesion. However, the properties of WCB of nanoscale dimensions remain unclear. Using molecular dynamics simulations, we investigate the geometrical and thermodynamic properties of WCB confined between chemically heterogeneous surfaces composed of circular hydrophilic patches on a hydrophobic background. We find that macroscopic capillary theory provides a good description of the WCB geometry and forces induced by the WCB on the confining surfaces even in the case of surface patches with diameters of only 4 nm. Upon stretching, the WCB contact angle changes from hydrophobic-like values(θ > 90°) to hydrophilic-like values(θ < 90°) until it finally breaks down into two droplets at wall separations of ~9–10 nm. We also show that the studied nanoscale WCB can be used to store relevant amounts of energy EPand explore how the walls patch geometry can be improved in order to maximize EP. Our findings show that nanoscale WCB can, in principle, be exploited for the design of clean energy storage devices as well as actuators that respond to changes in relative humidity. The present results can also be of crucial importance for the understanding of water transport in nanoporous media and nanoscale engineering systems.

关键词： water capillary bridge energy density morphology transition hydrophilicity