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Artificial Intelligence and Electromechanical Automation (AIEA), International Conference on

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

ISBN: (数字)9781728182889

ISBN: (纸本)9781728182896

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.

关键词： component tube burst failure analysis oxide matters over temperature FAILURE ANALYSIS excess temperature platen superheater Energy Dispersive X-Ray Spectroscopy oxides Cooling effects tube reducing

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Analysis of Frequent Tube Burst of High Temperature Reheater in 600 MW Unit

Analysis of Frequent Tube Burst of High Temperature Reheater...

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Sustainable power and Energy Conference (iSPEC)

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

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

The reasons of frequent tube burst of the high temperature reheater in a supercritical 600 MW unit were systematically investigated via the examination of macroscopic inspection, chemical composition, mechanical properties, microstructures, scanning electron microscope and energy disperse spectroscopy detection. It is demonstrated that the tube burst of the high temperature reheater results from not only design factors, but also manufacture quality. Due to the absence of solid solution treatment in spare elbow, the inner dislocations and residual stress increase obviously, which accelerates the precipitation of carbide containing Cr and the formation of Cr depleted zone on grain boundary(GB) subsequently, leading to the decrease of GB corrosion resistance and the final leakage of high temperature reheater tube induced by intergranular corrosion.

关键词： Temperature Corrosion Welding Electron tubes Residual stresses Acceleration Elbow

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Constructing built-in electric fields in bimetallic selenide heterojunctions to bidirectional catalyze polysulfide conversion for flexible lithium-sulfur batteries

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Chemical engineering Journal 2025年 516卷

作者： Han, Fangchao Zhang, Shichao Yan, Dezhi Xing, Yalan Xia, Jun Guan, Xianggang Lu, Qiang Yang, Puheng Wu, Xiaomeng Zhang, Qianfan School of Materials Science and Engineering Beihang University Beijing100191 China Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst POB 353 Beijing100190 China Shanghai Institute of Space Power Sources/State Key Laboratory of Space Power Sources China

Parasitic shuttle effects and sluggish kinetics severely limit the practical applications of lithium-sulfur (Li–S) batteries. Developing conducting catalysts with high catalytic activity is effective strategy to address such issues. Electronic engineering as tuning strategy can optimize the electronic structure and enhance the redox reaction kinetics. Herein, NiSe2-CoSe2 hollow microspheres with abundant heterogeneous interfaces were synthesized as sulfur cathode catalysts. DFT calculations show that heterostructure can promote electron redistribution and form built-in electric field (BIEF), which causes the directional transfer of electrons. Additionally, NiSe2-CoSe2 has optimized adsorption energy, which can effectively suppress shuttle effect. Meanwhile, electrochemical tests further confirmed bidirectional catalytic ability. Benefiting the merits, S/NiSe2-CoSe2-GO-CNF (S/NiCo-GN) achieved an initial discharge specific capacity of 1353.35 mAh g−1 at 0.2C and stable 1000 cycles at 1C with a capacity decay rate of only 0.044 % per cycle. Moreover, S/NiCo-GN also achieved high areal capacity of 1.688 mAh cm−2 at 0.5C under high loading (∼2.5 mg cm−2) and lean electrolyte (∼10 μL mg−1) conditions. The flexible pouch cell further demonstrated its high safety, good thermal stability, and robust mechanical stability. This work provides guiding methods for the design of efficient catalysts, which can contribute to the realisation of high-performance Li–S batteries. © 2025 Elsevier B.V.

关键词： Redox reactions

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Solid-state anaerobic co-digestion of highland barley straw, food waste, and yak manure:Co-digestion performances and microbial characteristics analysis

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Renewable Energy 2025年 252卷

作者： Bao, Rui Feng, Jiaqi Feng, Wenli Li, Xiujin Lu, Xuebin Zuo, Xiaoyu Liu, Rufei Yuan, Hairong State Key Laboratory of Chemical Resource Engineering Department of Environmental Science and Engineering Beijing University of Chemical Technology Beijing100029 China Key Laboratory of Thermo-Fluid Science and Engineering of MOE School of Energy and Power Engineering Xi'an Jiaotong University 28 Xianning West Road Shanxi Province Xi'an710049 China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University 28 Xianning West Road Shaanxi Province Xi'an710049 China Key Laboratory of Environmental Engineering and Pollution Control on the Plateau of Tibet Autonomous Region School of Ecology and Environment Tibet University Lhasa Tibet 850000 China School of Environmental·Science and Engineering Tianjin University Tianjin300350 China CUCDE Environmental Technology CO. LTD. Beijing100120 China

Co-digestion performances and microbial characteristics were investigated at solid-state anaerobic co-digestion system for highland barley straw (HBS), food waste (FW) and yak manure (YM). The different mixing ratios of HBS, FW, and YM were set according to the total solid content of different substrates. The results showed that the highest methane was 465.9 mL/g VS when the ratio of HBS:FW:YM was 0:5:1(HFY051), which was 4.5 %–102.6 % higher than those of co-digestion groups, HBS, and YM. The synergistic effect of co-digestion for different substrates contributed 6.3 %–123.1 % to improving methane yields in the first 25 days. Clostridium_sensu_stricto 1 and Fastidiosipila were the key bacterials and Methanosarcina and Methanobacterium were dominant methanogens at genus levels for different experimental groups. LEfSe indicated that 26 species have a great impact on co-digestion experimental groups. Therefore, solid-state anaerobic co-digestion of HBS, FW, and YM could improve the co-digestion performances and achieve higher methane yield. © 2025

关键词： Clostridium

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Research on the Noise Reduction and Efficiency Increase for Axial Fan with Wave Leading Edge Blades

Research Square

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Research Square 2020年

作者： Li, Bo Wu, Yu-Jing Guo, Dan-Ge Luo, Dan Huang, Dian-Gui School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai China Shanghai Key Laboratory of Power Energy in Multiphase Flow and Heat Transfer Shanghai China

This paper imitates the raised structure of the leading edge of the humpback whale fin limbs, designed six bionic blades. The aerodynamic analysis show that: the wave leading edge blade can improve the total pressure efficiency of the axial flow fan, and under off-design conditions, the aerodynamic performance of bionic fan is better than that of prototype fan. The noise analysis shows that: under the condition of constant wave number, increasing wave amplitude can reduce the overall sound pressure level at the monitoring point, in the middle and high frequency range, the sound pressure level of the bionic fan at the monitoring point is significantly lower than that of the prototype fan, and the noise reduction effect increases with the increase of wave amplitude;under the condition of constant wave amplitude, increasing the wave number can reduce the fan noise. At a certain wave number and amplitude, the overall sound pressure level of the bionic fan at the monitoring point is at most 2.91 dB lower than that of the prototype fan. In this paper, the noise reduction effect of increasing wave number is more obvious than that of increasing wave amplitude. © 2020, CC BY.

关键词： Noise abatement

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Digital techniques assisted in tailoring electrode structure to optimize electrode performance

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Energy Storage Materials 2025年 80卷

作者： Heng Huang Zhifu Zhou Wei-Tao Wu Lei Wei Chengzhi Hu Jiaxuan Ma Linsong Gao Yang Li Yubai Li Yongchen Song Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology Dalian 116023 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen 518055 China School of Mechanical Engineering and Mechanics Xiangtan University Xiangtan 411105 China

Poor rate performance limits the application of high-areal-loading electrodes in energy storage, and optimizing the microstructure of the cathode is considered as a way to improve this limitation. In this study, we integrated X-ray computed tomography (XCT) with digital technology (virtual electrodes and microstructure-based numerical simulations) to quantify the correlation between electrode structure and internal kinetic performance of lithium-ion electrodes. Results show that electrode structure alters the internal kinetic properties, thereby affecting rate capacity and nominal potential. Based on the parametric relationship between electrode structure and electrochemical-thermal properties, we explored the effects of structural regulation on electrode performance. Vertical channels significantly enhanced the rate capability and ohmic heating rate of small-particle electrodes, while solid-phase diffusion (SPD) dominated the discharge performance of large-particle electrodes, exhibiting low sensitivity to tortuous strategies. Furthermore, electrodes with abundant SPD barriers exhibit unidirectional propagation of reaction fronts, resulting in a deeper SPD-limited region. This observation inspired the integration of two structural strategies that favor both mass transport and reaction penetration. Optimized electrode structures enhanced energy density at high rates and accommodated diverse particle sizes and thicknesses. Additionally, the coupling effect of the heat transfer environment on electrode performance was investigated. This study presents a novel paradigm for bottom-up electrode design using microstructure-resolved model, providing both microscopic mechanisms and quantitative insights for advanced battery development.

关键词：

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Modified Stainless Steel as Anode Materials in Bioelectrochemical Systems

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ACS Symposium Series 2020年 1342卷 165-184页

作者： Pu, Kai-Bo Bai, Ji-Rui Chen, Qing-Yun Wang, Yun-Hai Department of Environmental Science and Engineering Xi'an Jiaotong University Xi'an710049 China State Key Lab of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

As a promising anode material in bioelectrochemical systems (BESs), stainless steel-based bioanodes were reviewed. The anode material must have good biocompatibility, excellent electrical conductivity, large specific surface area, high corrosion resistance, and a low cost. The design of stainless steel-based bioanodes has been the focus of numerous research studies over the past decade. The present chapter summarizes and discusses the recent advances in stainless steel-based bioanodes and their configurations. The stainless steel-based bioanodes will be discussed in terms of optimization of stainless steel structures, carbon modification, metal oxide modification, conductive polymer modification, and others. © 2019 American Chemical Society. All rights reserved.

关键词： Corrosion resistance

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Optimization of thermal spray parameters of nial/cr2c3 coating by taguchi method

Optimization of thermal spray parameters of nial/cr2c3 coati...

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Asia Conference on Material and Manufacturing Technology, ACMMT 2018

作者： Tahari, M. Luo, B. Geng, J. Jing, D. Hatami, M. EsfarayenNorth Khorasan Iran International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

ISBN: (纸本)9783035714050

In this study the effect of thermal spray process on wear resistance of NiAl/Cr2C3 thermal spray coating has been investigated. For this purpose the NiAl power mixed with 10 %wt. Cr2C3 powder and milled for 1 hrs at argon atmosphere. The APS parameters such as voltage (V), current(A), spray distance (mm), powder feed rate (gr/min), were optimize using a response surface methodology. For investigation effect of spray parameters on quality of coatings, the porosity and wear resistance of coatings analyzed with SEM and pin on disk wear test. Results show that increase of voltage and current are more effective other parameters. Increasing of powder feed rate and spray distance raised porosity of coatings intensively. © 2019 Trans Tech Publications Ltd, Switzerland.

关键词： Taguchi methods

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Suppression thermal runaway propagation of LiFePO4 batteries during nail penetration test based on liquid immersion cooling

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Energy 2025年 330卷

作者： Liu, Xinyu Li, Yang Gao, Shuai Lv, Xuecheng Zhou, Zhifu Wu, Wei-Tao Wei, Lei Lyu, Jizu Li, Yubai Song, Yongchen Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology Dalian116024 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China School of Mechanical Engineering Nanjing University of Science and Technology Nanjing210094 China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen518055 China School of Mechanical Engineering Guangdong Ocean University Zhanjiang524088 China

The thermal safety accidents of high specific energy lithium-ion batteries (LIBs) occur frequently, impeding their further large-scale application in electric vehicles. In this study, the experimental systems for semi-open and sealed spaces are established. Meanwhile, based on the liquid immersion cooling (LIC) system, the thermal runaway (TR) suppression mechanisms of the single LIB and LIB pack are reported systematically. For the single LIB (two pouch cells connected in series), the LIB is penetrated to 50 % depth, namely, the first pouch cell. We discover that the unpenetrated pouch cell remains at 0.58 V and is structurally intact. Compared with the natural convection conditions, the LIB peak temperature is decreased by 141.3 °C. The gas generation reactions are significantly mitigated. Furthermore, the heat and gas generation are gradually decreased with a reduction in state of charge (SOC). More importantly, after penetrating the first LIB in the LIB pack, we observe that the maximum temperature of the neighboring LIB is around 49 °C. The study provides a first step towards LIB thermal safety protection projects. © 2025 Elsevier Ltd

关键词： Lithium-ion batteries

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Numerical study on the thermal stratification phenomenon in the sodium-cooled fast reactor

Numerical study on the thermal stratification phenomenon in ...

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2019 Transactions of the American Nuclear Society, ANS 2019

作者： Zhang, Dalin Wang, Shibao Qiu, Suizheng Su, Guanghui School of Nuclear Science and Technology State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University No.28 Xianning West Road Xi'an710049 China

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