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Advances in thermal-related analysis techniques for solid-state lithium batteries

InfoMat 2023年第4期5卷 77-116页

作者： Jianan Wang Kai Yang Shiyi Sun Qianyue Ma Gong Yi Xin Chen Ze Wang Wei Yan Xinhua Liu Qiong Cai Yunlong Zhao Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power EngineeringSchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'anthe People's Republic of China Department of Chemical&Process Engineering Faculty of Engineering and Physical SciencesUniversity of SurreyGuildfordUK Advanced Technology Institute University of SurreyGuildfordUK School of Transportation Science and Engineering Beihang UniversityBeijingthe People's Republic of China

Solid-state lithium batteries(SSLBs)have been broadly accepted as a promising candidate for the next generation lithium-ion batteries(LIBs)with high energy density,long duration,and high *** intrinsic non-flammable nature and electrochemical/thermal/mechanical stability of solid electrolytes are expected to fundamentally solve the safety problems of conventional ***,thermal degradation and thermal runaway could also happen in *** example,the large interfacial resistance between solid electrolytes and electrodes could aggravate the joule heat generation;the anisotropic thermal diffusion could trigger the uneven temperature distribution and formation of hotspots further leading to lithium dendrite *** research efforts have been devoted to exploring solid electrolytes with outstanding performance and harmonizing interfacial incompatibility in the past *** have been fewer comprehensive reports investigating the thermal reaction process,thermal degradation,and thermal runaway of *** review seeks to highlight advanced thermal-related analysis techniques for SSLBs,by focusing particularly on multiscale and multidimensional thermal-related characterization,thermal monitoring techniques such as sensors,thermal experimental techniques imitating the abuse operating condition,and thermalrelated advanced *** perspectives are proposed to bridge fundamental studies to technological relevance for better understanding and performance optimization of SSLBs.

关键词： characterization monitoring simulation solid-state batteries thermal technique

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Lattice Boltzmann model for axisymmetric thermal flows

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Physical Review E 2009年第3期80卷 037702-037702页

作者： Q. Li Y. L. He G. H. Tang W. Q. Tao National Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi’an Jiaotong University Xi’an Shaanxi 710049 China

A thermal lattice Boltzmann (LB) model is presented for axisymmetric thermal flows in the incompressible limit. The model is based on the double-distribution-function LB method, which has attracted much attention since its emergence for its excellent numerical stability over the multispeed LB method. Compared with the existing axisymmetric thermal LB models, the present model is simpler and retains the inherent features of the standard LB method. Numerical simulations are carried out for the thermally developing laminar flows in circular ducts and the natural convection in an annulus between two coaxial vertical cylinders. The Nusselt number obtained from the simulations agrees well with the analytical solutions and/or the results reported in previous studies.

关键词： Numerical methods

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Failure analysis of tube-burst on T91 platen superheater of 600 MW supercritical boiler

Failure analysis of tube-burst on T91 platen superheater of ...

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2020 International Conference on Artificial Intelligence and Electromechanical Automation, AIEA 2020

作者： Sun, Ke Wang, Jia'An Yan, Yu Jiang, Jiahao Deng, Lei State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'An Jiaotong University Xi'an710049 China China Huadian Electric Power Research Institute Co. Ltd. Hangzhou310030 China

ISBN: (纸本)9781728182889

In this paper, the specimen of the bursting tubes, original tube and oxide-like debris are analysed in-depth by macroscopic examination, chemical composition analysis, mechanical properties, metallographic examination, scanning electron microscopy and energy spectrum analysis etc.,. It shows that the main reason for the tube-burst is that the original oxide matters or time-original oxide matters blocks the tube, reducing the cooling effect of the steam, and resulting in a short-term overheating of the tube. It is recommended to control the internal cleanliness of boiler equipment and pipest. © 2020 IEEE.

关键词： Scanning electron microscopy

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Statistical characterization of gas-liquid flow in swirl vane separator with image processing technique 18

Statistical characterization of gas-liquid flow in swirl van...

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18th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2019

作者： Liu, Li Bai, Bofeng School of Nuclear Science and Engineering Shanghai Jiao Tong University Shanghai200240 China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Shaanxi710049 China

Swirl vane separator is not only used in SG for separating more than 80% of liquid water from steam-water mixture to feed qualified steam to dryers and turbines, but also applied in the thorium molten salt reactor to remove dilute dispersed bubbles from reactor coolant. The proper design and operation of swirl vane separator requires a fundamental understanding of the gas-liquid flow pattern in the system, since the mass, momentum, and energy transfer rates and processes are quite sensitive to the distribution of the phases within the flow. This paper presents a comprehensive experimental study aimed at classifying flow patterns in the condition of swirling gas-liquid flow in a downscale swirl vane separator. While a large amount of work has been done on conventional, non-swirling, two-phase flow in small pipes, investigations on swirling flow regime classification are still scarce. Here, optical and image processing techniques are used to measure gas and liquid holdup in the system through time. Detailed qualitative description of the flow regimes observed in the experiment is provided. The temporal statistics of liquid holdup (PDF and CPDF) are also analyzed to characterize and distinguish the various swirling flow regimes objectively. Based on this study, the influence of centrifugal force on phase distribution of gas-liquid flow was clarified and the general relationship between swirling gas-liquid flow and non-swirling gas-liquid flow was gained. © 2019 American Nuclear Society. All rights reserved.

关键词： Image processing

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A simple green approach to synthesis of sub-100 nm carbon spheres as template for TiO_2 hollow nanospheres with enhanced photocatalytic activities

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Science China Materials 2018年第6期61卷 869-877页

作者： Yubo Tan1 Maochang Liu1 Daixing Wei1 Heming Tang2 Xinjian Feng2 Shaohua Shen1 International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University College of Chemistry Chemical Engineering and Materials Science Soochow University

Carbon spheres（CSs） have attracted great attention given their wide applications in bio-diagnostics, photonic band-gap crystals and drug delivery, etc. The morphology and size of CSs greatly affect their performances and applications. Herein, we report a green and catalyst-free hydrothermal carbonization（HTC） method to synthesize CSs with glucose as carbon precursor. The diameter of CSs can be tuned within a wide range from 450 to 40 nm by controlling the glucose concentration, reaction time and *** the obtained CSs as template, hollow TiO2 nanospheres（HTNSs） with controllable diameters are prepared via a sol-gel method. As photocatalysts for hydrogen generation, the photoactivity of the HTNSs shows strong dependence upon size,and is much higher than that of solid TiO2. With particle size decreasing, the photoactivity of the obtained HTNSs gradually increases. Without any co-catalyst, the highest photocatalytic hydrogen generation activity is obtained with HTNSs of 40 nm in diameter, which exceeds that of solid TiO2 and commercial P25 by 64 times and 3 times, respectively.

关键词： carbon nanospheres hydrothermal carbonization hollow titanium dioxide nanospheres photocatalytic hydrogen production

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A novel design of the collector's cover of solar induced convection power plant

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International Solar Energy Society Solar World Congress 2007, ISES 2007

作者： Li, Ping Mei, Danhua Li, Zaoyang Chen, Weixiong Zhang, Yongzhi Zhao, Liang School of Energy and Power Engineering Xi'an Jiaotong University P.O. Box 2264 Xi'an 710049 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

ISBN: (纸本)9781622765447

Solar Induced Convection power Plant is a technology of new energy using. It has a very broad perspective. However, the efficiency of the technology not so acceptable. This paper focuses on improving the efficiency of the technology. The thermal physical properties of common glass, polycarbonate and polycarbonate with CO2 ware compared in this paper to study the superiority and scientificity of polycarbonate with CO2. The results show that, the heat transfer coefficient of polycarbonate with CO2 is the smallest so that it has the best effect of warm-keeping. and it can improve the efficiency of the system to large extent. According to the study, the polycarbonate with CO2 is the best one for solar radiation to go through and it is not easy for Far Infrared ray to do that. Base on the results and other advantages of the polycarbonate with CO2, we conclude that polycarbonate with CO2 is the best choice for the material of the slope solar collector cover.

关键词： Polycarbonates

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Numerical investigation on erosion characteristics of coplanar elbows connection for gas-solid flow

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Energy Procedia 2019年 158卷 5245-5250页

作者： Yu Wang Rongtang Liu Ming Liu Junjie Yan State Key Laboratory of Multiphase Flow in Power Engineering School of Energy & Power Engineering Xi’an Jiaotong University Xi’an Shaanxi

Elbows are used widely in power plants. The erosive problems of the pipelines influence the performance of pipe system. Continuous arrangement of elbows is often necessary due to the limit of external space and connection length between elbows is short under the circumstance. The interaction between two elbows has influence on the flow field and erosion characteristics of elbows connection. The erosion distribution in coplanar elbow connection was presented and erosion characteristics of two kinds of coplanar elbows connection were obtained. The effects of inlet velocity and mass loading rate on maximum erosion rate were investigated. Results suggested the maximum wear rate increased exponentially with inlet velocity and increased linearly with mass loading rate.

关键词： Elbows connection Erosion characteristics Numerical simulation Gas-solid flow

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Experimental study on boiling heat transfer and two-phase frictional pressure drop characteristics of glycol-water solution in a vertical porous surface tube

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AIP Conference Proceedings 2013年第1期1547卷 390-399页

作者： Shouxu Qiao Haijun Wang Hongfang Gu Yushan Luo Lei Zhang Wei Xiong State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University 710049 Xi'an China

Although much research has been conducted on investigating the flow boiling heat transfer of low saturation temperature refrigerants, there are few experimental data and theory about the flow boiling heat transfer of high saturation temperature organic mixture which exists widely in the petrochemical industry. To investigate the characteristics of flow boiling heat transfer of high saturation temperature organic mixture, experiments of glycol-water solution flow boiling in a vertical porous surface tube and a vertical smooth tube are conducted. Test tubes are uniformly heated by electrical current with a heated length of 2,000 mm. The mass flux in the experiment ranges from 500 to 1,500t⋅h−1 and the heat flux on test tubes ranges from 10 to 40 kW⋅m−2. The flow boiling heat transfer coefficients and two-phase frictional pressure drops of the two types of tubes are obtained and compared. The results indicate that: the flow boiling heat transfer coefficient in the porous surface tube is 3.8∼5.7 times of that in smooth tube and the pressure drop of the porous surface tube is 0.99∼1.007 times of that in the smooth tube. The physical mechanisms of the enhanced heat transfer characteristics of flow boiling in the porous surface tube are analyzed. By the regression analysis of the experimental data, correlations predicting the flow boiling heat transfer coefficient and pressure drop of glycol-water solution within the error range of ±20% are established. The experimental results can be used to guide the design of heat exchange equipment using the porous surface tube as heat transfer elements under these test conditions.

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Analysis of electric vehicle development based on optimization model

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Energy Procedia 2019年 158卷 2841-2846页

作者： Qian Cheng Xiaonan Lu Haibo Dai Jinshi Wang State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an 710049 China

The new energy electric vehicles can dramatically relief the environmental pollution problem caused by fuel automobiles. Based on the environmental and economic factors, this paper constructs an optimization model on the number of charging stations. Under the premise of minimizing the capacity of charging station, the optimal allocation of cities, suburbs and countryside is obtained. According to the site-selecting principles, South Korea is taken as a sample. Based on the station-building optimization model, when the conversion of electric-powered vehicle has fully realized, the number of stations should be 874524. In addition, based on the station-building cost optimization model, the number of stations in city area is 23796. In consideration of economic factors, Logistic model is built to evaluate the converting progress of South Korea, and the conclusion illustrates that it will take at least 8~17 years (from 10% to 100%).

关键词： Sustainable Development Logistic model Multiobjective optimization

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Analysis of flow instabilities in forced-convection steam generator

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Nuclear Science and Techniques 2006年第3期000卷 185-192页

作者： WU Ge-Ping QIU Sui-Zheng SU Guang-Hui JIA Dou-Nan State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

Because of the practical importance of two-phase instabilities, substantial efforts have been made to date to understand the physical phenomena governing such instabilities and to develop computational tools to model the dynamics. The purpose of this study is to present a numerical model for the analysis of flow-induced instabilities in forced-convection steam generator. The model is based on the assumption of homogeneous two-phase flow and thermodynamic equilibrium of the phases. The thermal capacity of the heater wall has been included in the analysis. The model is used to analyze the flow instabilities in the steam generator and to study the effects of system pressure, mass flux, inlet temperature and inlet/outlet restriction, gap size, the ratio of do /di, and the ratio of qi/qo on the system behavior.

关键词： Steam generator Forced convection flow instability

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