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International Journal of Hydrogen Energy 2025年 146卷

作者： Xinrun Li Quanbin Zhao Daotong Chong Xinyue Yu Xiachen Hu State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 PR China

Solid oxide fuel cell (SOFC) system offers the benefits of high efficiency, low emissions, and quiet operation. However, complex interactions among components and the closed-loop nature of operating parameters present challenges for system control. This study investigates the dynamic responses of a standalone SOFC stack and a SOFC system integrated with auxiliary components under step changes of key operating parameters. Results demonstrate that auxiliary components play a critical role in shaping transient responses. A step increase in current reduces the fuel flow into the burner, ultimately causing stack temperature fluctuations due to increased current and decreased inlet temperature. The greater the current increase step magnitude, the larger the stack temperature fluctuation amplitude. A step increase in fuel and air flow respectively leads to an increase in the fuel and air entering the burner. The step increase of fuel flow causes the stack temperature to fluctuate, first dropping rapidly and then rising slowly. The step increase of air further lowers the stack temperature, as the burner and heat exchangers reduce the inlet gas temperature. Under +15 % step change in current, inlet fuel flow, and air flow, the changes in output power and response time are +512.3 W/330.3s, +667.7 W/836.8s, and −573.8 W/412.8s. Based on these findings, the prioritization of current regulation is recommended to achieve faster responses, improved efficiency, and enhanced thermal safety. Fuel and air flow adjustments are suggested as secondary measures for thermal and efficiency optimization.

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

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SSRN 2024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. © 2024, The Authors. All rights reserved.

关键词： Sustainable development

Investigations of Sodium Droplet Spreading and Evaporation on Surfaces with Different Wettability Based on Lattice Boltzmann Simulations

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SSRN 2024年

作者： Tang, Songsheng Guo, Kailun Tian, Zhixing Wang, Mingjun Wang, Chenglong He, Xiaoqiang Su, Guanghui Qiu, Suizheng Tian, Wenxi School of Nuclear Science and Technology State Key Lab. of Multiphase Flow in Power Engineering Shaanxi Key Lab. of Advanced Nuclear Energy and Technology Xi’an Jiaotong University Shaanxi Xi’an710049 China Key Lab. of Nuclear Reactor System Design Technology China Nuclear Power Research and Design Institute Chengdu610213 China

The spreading and evaporation of sodium droplets is one of the fundamental phenomena in high-temperature heat pipes. The LBM sodium two-phase flow and phase transition model, which can simulate a huge liquid-vapor density ratio, is first established and validated. Then, the spreading and evaporation processes of sodium droplets on solid walls with different wettability are numerically simulated and analyzed. The main conclusions obtained are as follows: (1) The dimensionless spreading diameter and time of the droplet spreading process conforms to Tanner's power law, and the power exponent has exponential relationship with the equilibrium wetting angle;(2) The maximum dimensionless spreading diameter is negatively and linearly correlated with the equilibrium wetting angle;(3) Evaporation of sodium droplets under constant heat flow conditions shows a mixed pattern. The droplets will be detached from the droplet wall at the late stage of evaporation, and the larger the equilibrium wetting angle the sooner the droplets detach. © 2024, The Authors. All rights reserved.

关键词： Evaporation

Numerical Simulation of Unsteady flow Control Mechanism of Attached Stationary Or Vibrating Small Cylinder On a Main Cylinder

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SSRN 2022年

作者： Huang, Shengxian Hu, Yu Wang, Ying Shanghai key laboratory of multiphase flow and heat transfer of power engineering School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai China National Key Laboratory of Science and Technology on Aerodynamic Design and Research Xi’an710072 China

The phenomena of flow separation and vortex shedding after bluff body are the key to the safety of offshore engineering. To deepen the understanding of the relevant physical mechanism of wake vortex control of the non-equal diameter double cylinder model, simulation was conducted when Re=200 using the SST k-ω turbulence model. The effects of different diameter ratios, position angle, and gap ratio between the double cylinder model on the flow pattern, surface pressure, and wake characteristics of the main cylinder are investigated. Four different forced vibration forms are applied to the small cylinder with the optimum arrangement area, and their influence on the hydrodynamic characteristics of the main cylinder is analyzed. The results show that the main cylinder's vortex shedding and aerodynamic characteristics can be effectively improved by the small auxiliary cylinder arranged in the near wake region of the main cylinder, and there is an optimal position for the small cylinder. In addition, the vibration of the small auxiliary cylinder in the wake area will cause the locking area of the main cylinder and the side vortex shedding on the main cylinder can be better suppressed by using the auxiliary vibration small cylinder with a suitable frequency ratio. © 2022, The Authors. All rights reserved.

关键词： Vortex shedding

Editorial of special issue (SI) "Multi-scale physics on fluid flow and heat transfer (Multi-scale PFFHT)"

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International Journal of Heat and Fluid flow 2025年 115卷

作者： Cheng, Lixin Bai, Bofeng Zhang, Haibin Wissink, Jan Gerard School of Engineering and Built Environment Sheffield Hallam University City Campus Howard Street SheffieldS11WB United Kingdom State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an710049 China Department of Mechanical and Aerospace Engineering Brunel University of London Kingston Lane UxbridgeUB8 3PH United Kingdom

Integrated analysis of lncRNAs expression profiling in systemic lupus erythematosus

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Rheumatology & Autoimmunity 2024年第2期4卷 119-121页

作者： Fen Zhang Guifang Zhao Yujie Bu Xing Cen Rong Zhao Fengwu Chen Shengxiao Zhang Junwei Chen Department of Rheumatology The Second Hospital of Shanxi Medical UniversityTaiyuanShanxiChina State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'anShaanxiChina

To the Editor,Systemic lupus erythematosus(SLE)is a chronic autoimmune disease with serious harm to human health and various clinical manifestations,which is characterized by over-activity of lymphocytes,production of autoantibodies,and effects on multiple organs.1 So far,the pathogenesis of SLE remains unclear;it is believed that genetic,environmental,infectious,and other factors participate in the pathogenesis of *** the gradual in-depth study of transcriptomics,genetic factors may be the root cause of SLE,2 and epigenetics plays an important role in genetic factors of SLE.3 Epigenetics means heritable changes in gene expression without shifting the DNA *** principal mechanisms of epigenetic regulation include histone modification,DNA methylation,and regulation of noncoding *** the past,studies of transcriptomics mainly focused on protein-coding ***,protein-coding genes that encode exons account for 1.5%of the genome,and genes without protein-coding capability account for more than 80%of the human genome.4 Therefore,studies of transcriptomics began to pay attention to long noncoding RNAs(lncRNAs),which play key roles in transcription control,posttranscriptional processing,protein metabolism,immune cell differentiation,and immune responses.5 However,knowledge of related lncRNAs in SLE remains limited.

关键词： lupus erythematosus organs

Constructing electron transport channel of SnO2/BaSO4 on g-C3N4 for enhanced visible-light-driven photocatalytic H2 production

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Materials Today Catalysis

Materials Today Catalysis 2025年 9卷

作者： Dong, Gongyue Guo, Xiaojuan Cheng, Cheng Chen, Feng Zhang, Jinfeng Du, Yanping Meng, Wei Liu, Maochang Shi, Jinwen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China Guangdong Provincial Key Laboratory of Multi-energy Complementary Distributed Energy Systems Dongguan University of Technology Dongguan523808 China School of Engineering Lancaster University LancasterLA1 4YW United Kingdom Gansu Company PipeChina Lanzhou730060 China Hunan Provincial Key Lab of Dark Tea and Jin-Hua Department of Material & Chemical Engineering Hunan City University Yiyang413000 China

Graphitic carbon nitride (g-C3N4) is confronted with the issue of poor utilization of photogenerated charge carriers, thereby leading to limited performance of photocatalytic hydrogen (H2) production, which restricts its potential application. Herein, the electron transport material SnO2/BaSO4 was synthesized to integrate with g-C3N4 for addressing the above problem. Various characterizations were conducted to investigate the g-C3N4-SnO2/BaSO4 photocatalyst, and it demonstrated that photogenerated electrons from g-C3N4 expeditiously migrate to SnO2/BaSO4 nanoparticles, which markedly hindered photogenerated carriers’ recombination. Subsequently, the g-C3N4-SnO2/BaSO4 photocatalyst demonstrated promoted photocatalytic H2 production at a rate of 14.2 μmol h−1 under visible-light illumination, which was 2.5 times higher than that of pristine g-C3N4. © 2025 The Authors

关键词： Barium sulfate

Improved thermal conductivity of styrene acrylic resin with carbon nanotubes, graphene and boron nitride hybrid fillers

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Carbon Resources Conversion 2021年第1期4卷 190-196页

作者： Fuhua Jia Emmanuel Oluwaseyi Fagbohun Qianyu Wang Duoyin Zhu Jianling Zhang Bin Gong Yanbin Cui State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Mechanical and Power Engineering Shenyang University of Chemical TechnologyShenyang 110142China University of Chinese Academy of Sciences Beijing 100049 China

In the process of printing and copying,the volatilization of toner produces tiny particles and harmful gases that are detrimental to the human ***-temperature printing and copying can reduce harmful gas *** acrylic resin is the main component of toner and the thermal conductivity of toner can be improved by increasing the thermal conductivity of styrene acrylic *** this paper,hexagonal boron nitride(h-BN),carboxyl modified multi-walled carbon nanotubes(MWCNTs-COOH)and graphene hybrid fillers were added into styrene acrylic resin to improve the thermal conductivity of resin composite by forming a connected thermal conductivity network in *** experimental result shows that the thermal conductivity of the h-BN/styrene acrylic resin composite increases with the increase in h-BN filler content(0-20wt%).When 20.0 wt%h-BN is added into styrene acrylic resin,the thermal conductivity is increased by 83.63%.Hybrid fillers(MWCNTs-COOH/graphene and 3.0 wt%h-BN)were added in styrene acrylic resin and the thermal conductivity of the composite is almost the same or higher than that of 20.0 wt%h-BN/styrene acrylic resin *** thermal conductivity of styrene acrylic resin composites improved by 69.57%and 87.14%via adding 1.5wt%CNTs-3 wt%h-BN and 1.0wt%graphene-3 wt%***-COOH or graphene can bridge isolated h-BN aggregates to form a thermally conductive network in styrene acrylic resin,while the addition of graphene improves the thermal conductivity of resin composite higher than that of MWCNTs-COOH.

关键词： Styrene acrylic resin Boron nitride Carbon nanotubes Graphene Thermal conductivity

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

The Interaction and Activation of Fe2o3/Ceo2 Oxygen Carrier in Chemical Looping Dry Reforming of Methane

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SSRN 2024年

作者： Zhang, Jinrui Liu, Xiaozhi Pan, Yue Wang, Yuhan Yang, Tianlong Li, Peng Shen, Yuanhui Su, Dong Pan, Ying Jin, Hongguang Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University 710049 China

Chemical looping dry reforming of methane (CL-DRM) holds great promise for both CO2 utilization and syngas production with high efficiencies. The structure and component of oxygen carriers (OCs) are critical factors that influence the CL-DRM performances, such as reaction activity and production selectivity. Incorporating CeO2 is known to enhance the reactivity and stability of Fe2O3 for chemical looping reforming. However, the underlying mechanism of how CeO2 synergistically interact with Fe2O3 to enhance performances is still not clear. In this work, we comparatively investigate CeO2 supported Fe2O3 OCs in interfacial and physical Fe-Ce contact modes. The OC with sol-gel method achieves 80% CH4 conversion and 96% CO selectivity, significantly improved from OC with the mechanically mixed sample. Additionally, we found a strong interaction between Fe2O3 and CeO2 components, resulting in the formation of CeFeO3 after the first cycle. Our in-situ environmental transmission electron microscopy study shows that the Fe2O3-CeO2 interaction promotes the oxygen release during the reduction. Iron exhibited significant activity with ceria under CO2, dissolving into CeO2 lattice and forming CeFeO3. Density function theory results suggest that the improved reactivity of Fe2O3/CeO2 OC results from the enhanced oxygen ion migration in CeFeO3 © 2024, The Authors. All rights reserved.

关键词： Sol-gels