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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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Experimental Study on the Characteristics of Effervescent Atomization

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Kung Cheng Je Wu Li Hsueh Pao/Journal of engineering Thermophysics 2019年第4期40卷 834-838页

作者： Wang, Wen-Jie Zheng, Xue-Bo Bai, Bo-Feng State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

In this paper, the characteristics of effervescent atomization are studied experimentally. A high speed camera was used to record the bubbling process and the change of the flow regime in the mixing chamber. Three typical flow regimes were observed, namely, bubble flow, transition flow and annular flow. The particle size of the spray droplet was measured by a laser particle sizer. The droplet diameter distribution curve under typical flow regimes was obtained. Bubble flow and annular flow showed a single peak distribution, while transition flow showed a bimodal distribution. The effects of parameters such as gas-liquid ratio (GLR), liquid mass flow rate and orifice diameter on droplet size were studied. The results showed that the larger the GLR, the larger the liquid mass flow rate and the smaller the orifice diameter, the smaller the SMD. The instability of the atomization process is analyzed. The larger the GLR and the smaller the orifice diameter, the greater the instability. © 2019, Science Press. All right reserved.

关键词： Atomization

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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.

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Strong Metal-Support Interaction-Induced Hydrogen Spillover Boosts Thermocatalytic Ammonia Decomposition

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Small (Weinheim an der Bergstrasse, Germany) 2025年 e2500830页

作者： Zechang Chen Biao Jiang Zijie Lu Jie Huang Jinwen Shi Maochang Liu International Research Center for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 P. R. China. Suzhou Academy of Xi'an Jiaotong University Suzhou Jiangsu 215123 P. R. China.

Efficient non-noble-metal catalysts are essential for the industrial application of ammonia decomposition reaction (ADR). This work reports a Ni-Co bimetallic thermocatalyst supported by BaCeYO (BCY), a proton-conducting cermet, demonstrating state-of-the-art ADR performance. This catalyst achieves 100% NH conversion at 550 °C with a gas hourly space velocity of 9000 mL h g and 95.1% conversion at 520 °C, notably lowering ADR temperature requirements. It also demonstrates outstanding stability under diverse conditions. The superior ADR activity arises from Ni-Co synergies, Ce's strong basicity, as well as extensive hydrogen spillover facilitated by Y doping-induced high oxygen vacancies. Specifically, BCY's strong adsorption of H* promotes the migration of H* from the active Ni/Co surface to oxygen sites of the support and subsequent rapid diffusion as OH* in oxygen vacancy channels. This metal-support-interaction-induced hydrogen spillover effect further liberates the original active sites and boosts ammonia activation.

关键词： ammonia decomposition hydrogen production metal catalyst proton‐conducting cermet thermocatalysis

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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： Xinyu Liu Yang Li Shuai Gao Xuecheng Lv Zhifu Zhou Wei-Tao Wu Lei Wei Jizu Lyu Yubai Li Yongchen Song Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology Dalian 116024 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 Guangdong Ocean University Zhanjiang 524088 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.

关键词： Liquid immersion cooling Sealed space Semi-open space Thermal runaway suppression Thermal safety protection

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Multiple defects construction of Co loading on Ni foam to activate water for promoting catalytic ozonation of dichloromethane

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Journal of hazardous materials 2025年 495卷 138816页

作者： Yongtao Li Chujun Luan Fawei Lin Xueyan Zhu Beibei Yan Zhanjun Cheng Guanyi Chen Chi He School of Environmental Science and Engineering Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization Tianjin 300072 PR China. School of Environmental Science and Engineering Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization Tianjin 300072 PR China. Electronic address: linfawei@***. School of Mechanical Engineering Tianjin University of Commerce Tianjin 300134 PR China. National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences Beijing 101408 PR China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049 PR China.

Catalytic ozonation of chlorinated volatile organic compounds (Cl-VOCs) still faces with obstacles of water poisoning and byproducts formation. This work successfully synthesizes a Co-based monolithic catalyst with multiple defects construction that could activate water to promote dichloromethane (DCM) conversion and mineralization by catalytic ozonation at 120 °C. CO(NH) and NHF firstly create Ni defects to provide more adhesion sites, while they further contributed to crystallization and orientated growth of CoO with a morphology of crowded nanoneedles, respectively, as well as etching Co defects and oxygen vacancies. Co-NUF-6 exhibited a DCM conversion of up to 88 % at a O/DCM of 10.0, and 3 vol% water elevated it to 98 % with approximately three times reduction of polychlorinated byproducts. CoO with abundant defects exhibited excellent water-activating effect to generate abundant O (superoxide) and O (peroxide), which replenished lattice oxygen and facilitated the production of more active hydroxyl groups from O hydroxylation, contributing to better DCM conversion and mineralization. This work transits low-temperature water poisoning to water activating and eliminated toxic polychlorinated byproducts by developing the monolithic catalyst with multiple defects for efficient elimination of DCM, which has application potential towards practical waste gas purification and provides guidance for future water-activating catalyst design.

关键词： Co-based monolithic catalyst DCM ozonation Low temperature Multiple defects construction Water activation

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Corrigendum to ‘Performance analysis of sCO 2 tube with high non-uniform heat flux: Thermal-fluid-structural evaluation and optimization’ [Volume 231, August 2023, 120849]

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Applied Thermal engineering 2023年 235卷

作者： Shuo Gao Yanjuan Wang Yi Li Qibin Liu Jinliang Xu The Beijing Key Laboratory of Multiphase Flow and Heat Transfer North China Electric Power University Beijing 102206 China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 10049 China

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Corrigendum to “Enhanced oxygen reduction reaction activity of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ cathode via Pr-doping for intermediate-temperature solid oxide fuel cells” [J. Alloys Compd. 1022 (2025), 179947]

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Journal of Alloys and Compounds 2025年 1024卷

作者： Benlin Xiang Weihua Jia Yuqi Wang Fei Li Weibin Xu Xinyi Li Jianbing Huang Quanyi Tang Xin Ding Le Wu Lan Zheng School of Chemical Engineering Northwest University Xi’an Shaanxi 710127 China Xi'an Key Lab of Green Hydrogen Energy Production Storage & Application Integration Technology Xi’an Shaanxi 710127 China Shaanxi Key Laboratory for Carbon Neutral Technology Xi’an Shaanxi 710069 China School of Carbon Neutrality College Northwest University Xi’an Shaanxi 710127 China State Key Laboratory of Multiphase Flow in Power engineering Xi’an Jiaotong University Xi'an Shaanxi 710049 China

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The role of rotary liquid-solid two-phase flow in the synergistic behavior between sand erosion and electrochemical corrosion of Ni 2 FeCrMo 0.2 alloy in marine environment

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Process Safety and Environmental Protection 2025年 200卷

作者： Xingqi Luo Qipeng Xu Kai Wang Jianjun Feng Yanhui Li Yan Liu Xiya Zhang State Key Laboratory of Water Engineering Ecology and Environment in Arid Area Xi’an University of Technology No.5 Jinhua South Road Xi’an 710048 China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University No.28 Xianning West Road Xi’an 710049 China Qinghai Salt Lake Industry Co. Ltd. No.28 Huanghe Road Golmud 816000 China

The erosion-corrosion behavior poses a significant threat to marine equipment, driven by complex multi-physics processes such as sand movement, surface erosion, electrochemical reactions, and corrosive ion transport. Aiming at the widely used rotating liquid-solid two-phase flow system in a marine environment, this study investigates the role of flow velocity in the erosion-corrosion behavior of Ni 2 FeCrMo 0.2 alloy. The coupling analysis of multi-component weight loss, electrochemical kinetics, and microstructure characterization clarifies the interactions between fluid flow, sand migration, ion transfer, and damage morphology, revealing the synergistic erosion-corrosion mechanism. The results show that the erosion-corrosion mechanism transfers with flow velocity. At low velocities, the erosion effect on the harder metal matrix is weak due to insufficient kinetic energy of the sand particles. However, the sand-surface impingement on the softer corrosion products and the mass transfer of corrosive ions lead to erosion-enhanced corrosion, which dominates the material damage process. In contrast, at higher velocities, the impact kinetic energy and frequency of sand particles rise, causing the erosion rate to increase exponentially, which surpasses corrosion, making erosion as the dominant damage mechanism at high velocities. These results highlight the critical role of flow velocity in controlling the erosion-corrosion synergy behavior.

关键词： Damage mechanism Erosion-corrosion behavior flow characteristics Marine equipment Multi-physics coupled processes

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Thermoelectric characteristics analysis of TOPAZ-II

Thermoelectric characteristics analysis of TOPAZ-II

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2019 Transactions of the American Nuclear Society, ANS 2019

作者： Dai, Zhiwen Wang, Chenglong Liu, Xiao Zhang, Dalin Qiu, Suizheng Su, Guanghui School of Nuclear Science and Technology Shanxi Engineering Research Center of Advanced Nuclear Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

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