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3rd International Conference on Testing Technology and Automation Engineering, TTAE 2023

作者： Xing, Zhaokai Wu, Fang Hu, Rongyuan Xu, Guobin Xie, Hongjun Fan, Shaohua Wang, Shanshan Yang, Jinfeng Meng, Lin Liu, Qihang State Nuclear Electric Power Planning Design & Research Institute Co Ltd Beijing100095 China Shandong Nuclear Power Company Ltd Yantai265116 China Xi'an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an710049 China

ISBN: (纸本)9781510674769

A numerical simulation study of Venturi overreading characteristics is carried out with Mixture model and Realizable k-e model, and a prediction model of Venturi overreading under low pressure conditions is proposed. Compared with the existing experimental data, it demonstrates that the numerical simulation results have high accuracy, the results indicate that the quality is the main factor affecting the Venturi overreading Meanwhile, the model in this paper is compared with with ten classical overreading prediction models such as homogeneous model. It shows that the average prediction deviation of the model in this paper is 3.2%, ranking second, and the maximum prediction deviation is 7.3%. This study can provide reference for the study of Venturi wet gas flowmetering overreading model, and also provide a theoretical basis and options for flowmetering technology. © 2024 SPIE.

关键词： Forecasting

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Homojunction photocatalysts for water splitting

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Nano Research 2022年第12期15卷 10171-10184页

作者： Xiangjiu Guan Shichao Zong Shaohua Shen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an710049China Suzhou Academy of Xi’an Jiaotong University Suzhou215123China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of EducationSchool of Water and EnvironmentChang’an UniversityXi’an710064China

Charge-carrier separation is regarded as one of the critical issues of photocatalytic water splitting and could be accelerated by constructing microscopic junctions in *** photocatalysts consisting of different forms of semiconductor with identical compositions could inherit the advantages of heterojunction-based photocatalysts in charge separation due to the built-in electric field,while omitting the potential drawbacks of interfacial lattice distortion by providing continuous band ***,homojunction-based photocatalysts have recently drawn growing attention in water *** this review,the synthetic approaches to preparing photocatalysts with various homojunction structures including p-n junction,phase junction,and facet junction were introduced,together with a comprehensive analysis and discussion on the latest progress in the application of photocatalytic water *** review work is expected to inspire more related work with promoted research on designing efficient homojunction-based photocatalytic systems for water splitting.

关键词： photocatalytic water splitting homojunction charge separation

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Eco-friendly calcium alginate microspheres enable enhanced profile control and oil displacement

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Petroleum Science 2024年第3期21卷 1928-1943页

作者： Xiao-Han Zhang Chang-Jing Zhou Yuan-Xiang Xiao Bo Hui Yong-Gang Xie Yu-Bin Su Xin-Ru Li Jie Huang Mao-Chang Liu International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'an710049ShaanxiPR.China Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs School of Petroleum EngineeringXi'an Shiyou UniversityXi'an 710065ShaanxiPR.China Oil&Gas Technology Research Institute Changqing Oilfield Branch CompanyPetroChinaXi'an710021ShaanxiPR China Suzhou Academy of Xi'an Jiaotong University Suzhou215123JiangsuPR China

Polymer microspheres(PMs),such as polyacrylamide,have been widely applied for enhanced oil recovery(EOR),yet with environmental ***,we report a microfluid displacement technology containing a bio-based eco-friendly material,i.e.,calcium alginate(CaAlg)microspheres for *** dominant mechanisms responsible for EOR over Ca Alg fluid have been verified,including the microscopic oil displacement efficacy augmented by regulating capillary force(determined by the joint action of interfacial tension and wettability between different phases)and macroscopic sweep volume increment through profile control and mobility ratio *** comprehensive effectiveness can be further impacted when the CaAlg microsphere is embellished ulteriorly by using appropriate amount of sodium dodecyl sulfonate(SDS).The core flooding and nuclear magnetic resonance(NMR)tests demonstrate that CaAlg-SDS microsphere can balance the interphase property regulation(wettability alteration and IFT reduction)and rheology properties,enabling simultaneous profile control and oil *** introduction of SDS will have a negative impact on rheological properties,which is not favored for *** results show that the involvement of 4-m M SDS will provide the best behavior,with an EOR rate of 34.38%.This cost-effective and environmentally-friendly bio-microspherebased microfluidic displacement technology is expected to achieve“green”oil recovery in future oilfield exploitation.

关键词： Calcium alginate microspheres Wettability Interfacial tension Rheology Viscoelasticity Enhanced oil recovery(EOR)

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Numerical Simulation of flow Distribution and Transient Thermal Stratification Characteristics of Passive Residual Heat Removal Heat Exchangers

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Yuanzineng Kexue Jishu/Atomic Energy Science and Technology 2025年第5期59卷 1006-1015页

作者： He, Shaopeng Wang, Mingjun Tian, Wenxi Qiu, Suizheng Su, Guanghui State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China Nuclear Thermal-hydraulic Laboratory Xi’an Jiaotong University Xi’an710049 China

The passive residual heat removal heat exchanger (PRHR HX) is a key component of the third-generation advanced pressurized water reactor (PWR) nuclear power plant’s passive safety systems. The PRHR HX has numerous heat transfer tubes with varying lengths and arrangements on the primary side, leading to different flow distributions and resistance characteristics. The secondary side experiences various physical processes, including natural convection, mixed convection, and boiling heat transfer, significantly impacting the heat exchanger’s natural circulation and residual heat removal capacity. Current numerical analysis methods for PRHR HX inadequately consider flow distribution and resistance characteristics on the primary side. A porous medium-pipe-level coupling calculation method was established, introducing a parallel C-shaped pipe-level flow distribution and resistance iterative solution model. A matching strategy for grid control volumes on both sides and physical field communication was proposed, and a mathematical-physical model suitable for natural circulation and two-phase boiling conditions was developed for the PRHR HX, enabling coupling analysis between the primary side’s pipe-level resolution physical field and the secondary side’s porous medium computational domain. Based on data from Japan’s ROSA test facility, program validation was conducted, comparing heat transfer amounts, primary side outlet temperatures, and temperature profiles under single-phase and two-phase conditions, with good agreement between calculated and experimental values. flow distribution and resistance characteristics on the primary side under coupled conditions of the AP1000 reactor’s PRHR HX was explored. The variation of secondary side thermal stratification with different operational parameters was analyzed. Results indicate that when the total flow rate on the primary side increases, the proportion of frictional pressure drop in the total pressure drop increases, diminishin

关键词： Natural convection

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PROCESS MODELING AND ECONOMIC VIABILITY ANALYSIS OF A POWER-TO-H2-TO-POWER SYSTEM: CASE STUDY IN CHINA 37

PROCESS MODELING AND ECONOMIC VIABILITY ANALYSIS OF A POWER-...

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37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2024

作者： Li, Yanxin Dai, Yanbing Han, Xiaoqu Guo, Xuanhua Karellas, Sotirios Yan, Junjie State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China Qingdao Huaru Energy Technology Company Limited Qingdao China Laboratory of Steam Boilers and Thermal Plants National Technical University of Athens 9 Heroon Polytechniou str. Zografou Greece

ISBN: (纸本)9798331307660

The power sector generates the most significant greenhouse gas emissions in many countries, while renewable energy penetration faces a bottleneck due to its ***, it is imperative to make substantial efforts to promote the penetration of renewable energy sources into the power *** process of hydrogen production with renewable energy sources is becoming increasingly economical as the cost of renewable energy sources, particularly onshore wind, has fallen *** the present work, a power-to-H2-to-power system (PHPS) combining onshore wind power was proposed as a solution for high penetration of renewable energy, which incorporates a large-scale alkaline water electrolyzer, and a gas turbine.A techno-economic study based on NOVO PRO© and GT PRO was carried out and applied to cases in Shaanxi, *** performance and operational characteristics of two types of PHPS with different hydrogen storage methods, PHPS/Tank and PHPS/Cavern, were *** is indicated that when 30% of the fuel of the gas turbine was replaced by hydrogen, the levelized cost of energy (LCOE) of the PHPS/Cavern was 0.0498 €/kWh with an internal rate of return (IRR) of 6.41%, therefore, PHPS/Cavern was economically feasible in ***, the renewable energy utilization and carbon reduction benefits of the PHPS were *** surplus electricity (curtailed electricity) and carbon emissions of the PHPS/Cavern can be decreased by 52% and 12%, respectively, compared to those of PHPS without hydrogen as the energy *** performance of PHPS with different hydrogen substitution ratios was *** analysis was further conducted to investigate the influence of key parameters on the system performance, including wind modules investment, electrolyzer investment, transport distance, and electricity ***, under the future scenarios in China in 2050, the LCOE of PHPS/Cavern can be reduced by 15% as well as the IRR increased by 66%.The result

关键词： Hydrogen storage

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Application-oriented hydrolysis reaction system of solid-state hydrogen storage materials for high energy density target:A review

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Journal of Energy Chemistry 2022年第11期31卷 218-238,I0007页

作者： Jing Yao Zhen Wu Huan Wang Fusheng Yang Jianwei Ren Zaoxiao Zhang School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina Department of Mechanical Engineering Science University of JohannesburgJohannesburg 2092South Africa State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Hydrogen storage and delivery technology is still a bottleneck in the hydrogen industry *** all kinds of hydrogen storage methods,light-weight solid-state hydrogen storage(LSHS)materials could become promising due to its intrinsic high hydrogen *** reaction of LSHS materials occurs at moderate conditions,indicating the potential for portable *** present,most of review work focuses on the improvement of material performance,especially the catalysts *** part is important,but the others,such as operation modes,are also vital to to make full use of material potential in the practical *** operation modes of hydrolysis reaction have an impact on hydrogen capacity to various *** example,hydrolysis in solution would decrease the hydrogen capacity of hydrogen generator to a low value due to the excessive water participating in the ***,application-oriented operation modes could become a key problem for hydrolysis reaction of LSHS *** this paper,the operation modes of hydrolysis reaction and their practical applications are mainly *** implements of each operation mode are discussed and compared in detail to determine the suitable one for practical applications with the requirement of high energy *** current challenges and future directions are also discussed.

关键词： Solid-state hydrogen storage High energy density Hydrogen generator Hydrolysis reaction Portable applications

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Research on the THMC Coupling Model for Enhanced Geothermal Systems Based on the Framework of EDFM 29th

Research on the THMC Coupling Model for Enhanced Geothermal ...

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29th International Conference on Computational and Experimental Engineering and Sciences, ICCES 2023

作者： Zhang, Weitao Han, Dongxu Jiao, Kaituo Chen, Yujie Yuan, Qing Gong, Liang Yu, Bo Qingdao266580 China Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil and Gas Development School of Mechanical Engineering Beijing Institute of Petrochemical Technology Beijing102617 China State Key Laboratory of Multiphase Flow in Power Engineering School of Chemical Engineering and Technology Xi’an Jiaotong University Xi’an710049 China

ISBN: (纸本)9783031429866

The Enhanced Geothermal System (EGS) involves a complex thermo-hydro-mechanical-chemical (THMC) coupling process during long-term heat extraction. However, many models used to solve fractured reservoir problems are computationally time-consuming, especially when dealing with reservoir-scale engineering problems. To address this challenge, this paper proposes a novel THMC coupling model that solves the governing equations using a unified FVM framework based on the embedded discrete fracture model (EDFM). The accuracy of the model is confirmed by comparing the THC coupling and displacement (M) results with the Fully Resolved Solution Method (FRSM) from MRST software and COMSOL, respectively. Moreover, the model developed is utilized to simulate and analyze the spatiotemporal behavior of pressure, temperature, concentration, and mechanical deformation in EGS. The results suggest that the model is appropriate for effectively assessing the long-term production performance of EGS. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Finite volume method

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Engineering practice and economic analysis of ozone oxidation wet denitrification technology

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Chinese Journal of Chemical Engineering 2021年第1期34卷 401-408页

作者： Yang Li Defu Che Chenglong Yang Mingyu Yao Tingwen Zhao Kangli Fu Hanchen Zhao Xi’an Thermal Power Research Institute Co LtdXi’an 710032China State Key Laboratory of Multiphase Flow for Power Engineering Xi’an Jiaotong UniversityXi’an 710049China

SO_(2)and NO emitted from coal-fired power plants have caused serious air pollution in *** this study,a test system for NO oxidation using O_(3)is *** basic characteristics of NO oxidation and products forms are studied.A separate test system for the combined removal of SO_(2)and NO_(x)is also established,and the absorption characteristics of NO_(x)are *** characteristics of NO oxidation and NO_(x)absorption were verified in a 35 t·h^(-1)industrial boiler wet combined desulfurization and denitrification *** operating economy of ozone oxidation wet denitrification technology is *** results show that O_(3)has a high rate and strong selectivity for NO *** O_(3)is insufficient,the primary oxidation product is NO_(2).When O_(3)is present in excess,NO_(2)continues to get oxidized to N_(2)O_(5)or NO_(3).The removal efficiency of NO_(2)in alkaline absorption system is low(only about 15%).NOx removal efficiency can be improved by oxidizing NO_(x)to N_(2)O_(5)or NO_(3)by increasing ozone *** the molar ratio of O_(3)/NO is 1.77,the NOx removal efficiency reaches 90.3%,while the operating cost of removing NO_(x)per kilogram is 6.06 USD(NO_(2)).

关键词： Ozone Denitrification Wet process Engineering practice

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Electrochemical evolution of a metal oxyhydroxide surface on two-dimensional layered metal phosphorus trisulfides enables the oxidation of amine to nitrile

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Carbon Energy 2025年第3期7卷 133-147页

作者： Binglan Wu Karim Harrath Marshet Getaye Sendeku Tofik Ahmed Shifa Yuxin Huang Jing Tai Fekadu Tsegaye Dajan Kassa Belay Ibrahim Xueying Zhan Zhenxing Wang Elisa Moretti Ying Yang Fengmei Wang Alberto Vomiero State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing University of Chemical TechnologyBeijingChina CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology(NCNST)BeijingChina Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of EducationCollege of Chemistry&Materials ScienceNorthwest UniversityXi'anChina State Key Laboratory of Multiphase Flow in Power Engineering International Research Center for Renewable EnergyXi'an Jiaotong UniversityShaanxiChina Fundamental Science Center of Rare Earths Ganjiang Innovation AcademyChinese Academy of ScienceGanzhouChina Ocean Hydrogen Energy R&D Center Research Institute of Tsinghua University in ShenzhenShenzhenChina Department of Molecular Sciences and Nanosystems Ca'Foscari University of VeniceVenezia MestreItaly Testing and Analysis Center Institute of Chemistry Chinese Academy of SciencesBeijingChina Department of Engineering Sciences and Mathematics Division of Materials ScienceLuleåUniversity of TechnologyLuleåSweden

Selective oxidation of amines to imines through electrocatalysis is an attractive and efficient way for the chemical industry to produce nitrile compounds,but it is limited by the difficulty of designing efficient catalysts and lack of understanding the mechanism of ***,we demonstrate a novel strategy by generation of oxyhydroxide layers on two-dimensional iron-doped layered nickel phosphorus trisulfides(Ni1-xFexPS_(3))during the oxidation of benzylamine(BA).In-depth structural and surface chemical characterizations during the electrocatalytic process combined with theoretical calculations reveal that Ni(1-x)FexPS_(3) undergoes surface reconstruction under alkaline conditions to form the metal oxyhydroxide/phosphorus trichalcogenide(NiFeOOH/Ni1-xFexPS_(3))***,the generated heterointerface facilitates BA oxidation with a low onset potential of 1.39 V and Faradaic efficiency of 53%for benzonitrile(BN)*** calculations further indicate that the as-formed NiFeOOH/Ni1-xFexPS_(3) heterostructure could offer optimum free energy for BA adsorption and BN desorption,resulting in promising BN synthesis.

关键词： 2D layered materials benzylamine oxidation metal phosphorus trichalcogenides surfacereconstructed heterostructure

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Experimental study on the thermochemical reduction of supercritical CO2 by guaiacol

Experimental study on the thermochemical reduction of superc...

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International Multidisciplinary Conference on Computer and Energy Science (SpliTech)

作者： Yimeng Wei Jiadela Kuanibieke Hui Jin State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University China

The continuous growth of CO 2 emissions is one of the global problems facing humanity, and how to convert and exploit the stock of CO 2 has become an urgent issue. Biomass as an activity of CO 2 thermal reduction medium has become the focus of human attention in general. Supercritical CO 2 (SCCO 2 ) has the advantages of near-liquid density and high solubility, which can further strengthen the reduction process (T≥31.26℃, P≥72.9 atm). This paper described a SCCO 2 reduction method of guaiacol on an intermittent Kettle Reactor to investigate the effects of reaction temperature (400-700℃), residence time (5-20 min) and reactant concentration (4 wt%-16wt%) on the three-phase products. The experimental results indicated that the carbon gasification efficiency (CE) and hydrogen gasification efficiency (HE) were 43.7% and 56.7%, respectively, when the carbon dioxide consumption reached 16.15 mol/kg. As the temperature increased, the consumption of carbon dioxide increased and the concentration of reactants increased with opposite results.

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