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Kinetic Characteristics of Passivation Behavior in OFP-Cu and OF-Cu

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SSRN 2024年

作者： Ning, Zhiyuan Wen, Du Zhou, Qulan Li, Na Macdonald, Digby D. State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China Departments of Nuclear Engineering and Materials Science and Engineering University of California at Berkeley BerkeleyCA94720 United States Industrial Process and Energy Systems Engineering Ećole Polytechnique Fédérale de Lausanne EPFL SionCH-1951 Switzerland

This research presents a comprehensive comparative analysis of the passivation kinetics of OFP-Cu and OF-Cu in simulated repository electrolyte. The study employs a range of techniques, including potentiodynamic polarization, multi-step potentiostatic polarization, electrochemical impedance spectroscopy, and Mott-Schottky analysis, to explore the intricacies of corrosion behavior. The Point Defect Model (PDM) is used to interpret the steady-state physicochemical processes. Utilizing the results of PDM optimization, defect distribution diagrams within the passivation film were constructed, shedding light on the pivotal transition from p-type to n-type semiconductor properties of the film. The study concludes with an interpretation of the experimental data, highlighting the enhancement of copper's corrosion resistance due to phosphorus doping, as elucidated by the Solute-Vacancy Interaction Model. © 2024, The Authors. All rights reserved.

关键词： Copper corrosion

Simulations on Hybrid Thermal Management of Mini-Channel Cold Plate and Pcm for Lithium-Ion Batteries Under Discharging and Thermal Runaway Conditions

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SSRN 2024年

作者： Liu, Yang Zhou, Zhifu Wu, Wei-Tao Wei, Lei Lyu, Jizu Li, Yang Liu, Xinyu Li, Yubai Song, Yongchen Key Laboratory of Ocean Energy Utilization and Energy Conservation 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

In this study, we compared the performance of different structures of mini-channel cold plate (MCP)- phase change material (PCM) hybrid thermal management on discharge and thermal runaway. The heat transfer structures for them can be categorized into three types: (a) uncoupled, (b) semi-coupled, and (c) fully coupled. Among these, the semi-coupled design B exhibits the best performance. Specifically, in the high rate discharge condition, the structure can control the battery temperature at 44.37°C at low coolant mass flow rate, and the temperature at 36.47°C at high mass flow rate, while the temperature difference (TD) of a single cell does not exceed 2.01°C. In a low-multiplier discharge zero-energy system, the pack temperature rise can be limited to no more than 10°C in 35°C environment. Under external short-circuit conditions, a lower coolant mass flow rate is sufficient to keep the pack temperature at 43.22°C. Under internal short-circuit thermal runaway (TR), lower coolant mass flow rate can prolong the TR of the adjacent cell up to 521 s, and higher mass flow rate can completely inhibit the occurrence of TR. The objective of this study is to offer valuable references for the design and implementation of hybrid MCP-PCM cooling systems. © 2024, The Authors. All rights reserved.

关键词： Phase change materials

Experimental Study on Fragmentation Characteristics of Molten Stainless Steel Discharged into Liquid Lbe Pool

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SSRN 2024年

作者： Fan, Shuowang Chen, Yutong Zhang, Dalin Deng, Jian Zhang, Xisi Wu, Xiaoli Tian, Wenxi Qiu, Suizheng Su, Guanghui School of Nuclear Science and Technology Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi’an710049 China Shanghai Nuclear Engineering Research and Design Institute Co. Ltd 29 Hongcao Road Shanghai200233 China Nuclear Power Institute of China 328 Changshun Avenue Chengdu610213 China China Institute of Atomic Energy Beijing611731 China

The LFR is a candidate for the Generation-IV nuclear systems, where the process of MFCI differs from that occurred in LWRs and SFRs. In the absence of experimental study and widely applied theoretical models for LFRs, experiments on the interaction between molten SS and liquid LBE are conducted in this study under eight conditions. The morphological characteristics and fragment sizes of the products are analyzed based on the hydrodynamic effect parameter (We) and thermal effect parameter (Tic). Simplified thermal fragmentation models are established, where the innermost layer of the solidified shell is subjected to the maximum tangential compressive stress, while the outermost layer is subjected to the maximum tangential tensile stress. As the shell thickness increases, the total tangential stress of the outermost layer decreases. The fragmentation will occur when the maximum tangential stress on the shell exceeds the shell tensile strength. © 2024, The Authors. All rights reserved.

关键词： Tensile strength

An Experimental Study on the Hypergolic Process Enhanced by Pre-Ignition Heat Release: [Amim][Dca]/Furfuryl Alcohol Blends Reacting with White Fuming Nitric Acid

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SSRN 2022年

作者： Wu, Yingtao Wang, Zhi Fei, Lihan Guo, Yang Liu, Yang Tang, Chenglong Huang, Zuohua State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China Research Center of Energetic Material Genome Science Institute of Chemical Materials China Academy of Engineering Physics Mianyang China

The hypergolic ignition behaviors of [AMIM][DCA] (1-allyl-3-methylimidazolium dicyanamide)/furfuryl alcohol (FA) blends reacting with white fuming nitric acid (WFNA) are investigated using drop test approach. Morphology results from two high speed cameras and temperature profiles from an infrared camera are combined in analyzing the hypergolic process. A typical hypergolic process observed in this work involves a mixing dominant stage, a stage with moderate temperature rising and vapor/secondary droplets emerging, and a stage with violent temperature rising accompanied by flame occurrence. Two kinds of delay times are used to characterize the hypergolic process which are found to be nonmonotonic with the variations of FA fractions. FA, though not hypergolic with WFNA, exhibits extensive pre-ignition heat release due to its physical and chemical properties, which enhances the hypergolic process of [AMIM][DCA]/FA blends with WFNA. © 2022, The Authors. All rights reserved.

关键词： Ionic liquids

Study on the effect of particle flow state on the stability of LIBS carbon content detection signal 7

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Study on the effect of particle flow state on the stability ...

7th International Conference on Power Engineering, ICOPE 2019

作者： Pan, Yuqing Hu, Zhengtao Xu, Heng Zhou, Qulan Li, Na Deguchi, Yoshihiro State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China Graduate School of Engineering Science Osaka University Japan

Rice husk, a type of biomass fuel, is rich in amorphous silica. Laser-induced breakdown spectroscopy (LIBS) is a fast-responding non-contact detection method which can realize on-line detection of rice ash components. This paper aims to explore the optimum working conditions of LIBS and extend the compatibility of LIBS technology. The paper uses the sample motion state simulation system to simulate ash, so that the particles can be laser-induced breakdown during the vertical drop and horizontal motion, and then the effect of particle flow state on the stability of the LIBS detection signal can be determined. In addition, the paper compares the effects of two laser pulse widths on the stability of LIBS detection signal by using a 1 ns pulse width laser and a 6 ns pulse width laser to improve the detection error. Experimental studies have found that long pulse width laser provides better stability of spectrum, and the relative standard deviation (RSD) of the detection result is smaller than that of short pulse width laser, and the RSD is smaller in the state of horizontally transferring samples, which can obtain the spectral signal with stronger line intensity. Moreover, sample in conveyor, by contrast, leads to more stable signals. © ICOPE 2019 - 7th International Conference on Power Engineering, Proceedings. All rights reserved.

关键词： Stability

Experimental Study on Liquid Immersion Preheating of Lithium-Ion Batteries Under Low Temperature Environment

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SSRN 2024年

作者： Bao, Jiakang Zhou, Zhifu Wu, Wei-Tao Wei, Lei Jizu, Lyu Li, Yang Huang, Heng 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

In this paper, a single-phase immersion preheating experimental test platform is constructed to analyze the immersion preheating, the preheating performance, and the energy consumption. Immersion preheating has a major improvement on the low-temperature performance of the lithium cell, and the warming rate during preheating varies depending on the temperature (-25°C, -15°C, -5°C, 5°C, 15°C, 25°C) is very close to each other. The inlet temperature has a greater influence on the preheating performance than other factors, increasing the inlet temperature is favorable to rate of warming, but will increase the cell safety risks. flow rate and battery spacing increases on the rate of increase in temperature of the impact is gradually weakened, the rising inlet flows on the battery pack module temperature difference has a greater impact, the spacing increases on the battery cell and the battery pack temperature difference is gradually reduced, even so the maximum battery temperature difference is still controlled to 6℃ or less. In addition, immersion preheating has lower utilization of heat and higher energy consumption, and the preheating energy consumption at ambient temperature -25℃ has exceeded 80 % of the rated capacity of experimental battery packs. © 2024, The Authors. All rights reserved.

关键词： Energy utilization

Experimental Study on Deliquification with Atomizing Nozzle in Gas Well

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Experimental Study on Deliquification with Atomizing Nozzle ...

作者： Yutang Gao Xiaobai Li Peng Chang Lei Liu State Key Laboratory of Multiphase Flow in Power Engineering

Gas is a clean energy resource in comparison with oil and coal. Liquid-loading problem is frequently encountered in the process of gas production. It would directly cause the production of gas wells decreasing, even off production. A number of deliquification techniques have been suggested for solving this kind of problem, but the available techniques are not yet widely applicable. Based on the analysis, the method of deliquification with atomizing nozzle in gas wells was put forward. The test bench was designed for studying the atomization of nozzles and the liquid entrainment of gas flow. The size distribution of atomized droplets was measured by Malvern laser grain size analyzer. The Sauter mean diameters of atomized droplets were analysed under different two-phase flow conditions. The results indicate that the designed nozzles have good atomization performances and show potential application for reducing liquid loading in gas wells.

关键词： Gas well liquid loading deliquification atomizing nozzle two-phase flow

Corrigendum to “Multi-scale coupling analysis of the flow blockage accident in the typical LFR” [Int. J. Therm. Sci., 195, January 2024, 108615]

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International Journal of Thermal Sciences 2024年 204卷

作者： Hanrui Qiu Mingjun Wang Jing Zhang Wenxi Tian G.H. Su State Key Laboratory of Multiphase Flow in Power Engineering School of Nuclear Science and Technology Xi'an Jiaotong University Xi'an 710049 China

Driving with Clean Footprint: Biodiesel Application and Sustainable Development of the Transportation Sector in China

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SSRN 2023年

作者： Chen, Chuangbin Deng, Chenchen Zhang, Bo Yang, Song Centre for Southeast Asia Studies Shantou University Guangdong Shantou City515063 China Jinhe Center for Economic Research Xi’an Jiaotong University Xianning West Road Shaanxi Xi’an710049 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710049 China

The advancement of global endeavors to mitigate climate change significantly hinges upon developments within China's transportation sector. This study presents a pioneering examination of the pivotal role of biodiesel as a renewable energy source, accentuating its substantial contributions to China's ambitious objectives of attaining carbon neutrality and reaching the peak of carbon dioxide emissions. Employing the Long-range Energy Alternative Planning System, we formulate five distinct scenarios encompassing the prevailing trend, the promotion of B5 (5% biodiesel blend) and B10 (10% biodiesel blend), China's existing policy framework, policies embraced by the European Union, as well as alternative biofuels. Our analysis reveals that all scenarios exhibit varying degrees of CO2 emissions reduction by the year 2040. The third scenario, driven by China's informal environmental participation, tax incentives, and supportive policies, yields noteworthy outcomes, albeit less substantial in comparison to the EU policy scenario. The B5-B10 scenario presents a more significant reduction in CO2 emissions, although it proves to be less effective in addressing other pollutant emissions in contrast to the alternative biofuel scenario. Furthermore, the adoption of B5-B10 fuels also carries significant economic advantages, with projected emissions reductions amounting to 1.17 trillion yuan (approximately 0.17 trillion dollars) by 2030. Overall, our findings underscore the global implications of China’s low-carbon transportation strategy. The mutually advantageous interactions between formal environmental policies, informal public engagement, and lessons derived from the European Union's policies collectively shape the sustainable development of China's transportation sector. © 2023, The Authors. All rights reserved.

关键词： Sustainable development