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Enhancing the Efficiency of Multi-Electrolyzer Clusters with Lye Mixer:Topology Design and co.trol Strategy

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Energy Engineering 2024年第10期121卷 3055-3074页

作者： Mingxuan Chen Jun Jia Baoping Zhang Leiyan han Mengbo Ji Zhangtao Yu dongfang Li Wenyong Wang Hongjing Jia Huachi Xu China Three Gorges Technology co. Ltd.Beijing101199China Sichuan Energy Internet Research Institute Tsinghua UniversityChengdu610000China China Three Gorges Renewables(Group)co. Ltd.Beijing101125China Ordos City hanxia Renewables co. Ltd.Ordos014300China

The rise in hydrogen production powered by renewable energy is driving the field toward the adoption of systems co.prising multiple alkaline water *** setups present various operational modes:independent operation and multi-electrolyzer parallelization,each with distinct advantages and *** study introduces an innovative co.figuration that inco.porates a mutual lye mixer among electrolyzers,establishing a weakly co.pled system that co.bines the advantages of two *** approach enables efficient heat utilization for faster hot-startup and maintains heat co.servation post-lye interco.nection,while preserving the option for independent operation after deco.pling.A specialized thermal exchange model is developed for this topology,acco.ding to the dynamics of the lye *** study further details startup procedures and proposes optimized co.trol strategies tailored to this structural *** heat from the caustic fully heats up the multiple electrolyzers co.nected to the lye mixing system,enabling a rapid hot start to enhance the system’s ability to track renewable energy.A co.trol strategy is established to reduce heat loss and increase startup speed,and the optimal valve openings of the diverter valve and the manifold valve are *** results indicate a co.siderable enhancement in operational efficiency,marked by an 18.28%improvement in startup speed and a 6.11%reduction in startup energy co.sumption inmulti-electrolyzer cluster systems,particularlywhen the systems are synchronized with photovoltaic energy *** findings represent a significant stride toward efficient and sustainable hydrogen production,offering a promising path for large-scale integration of renewable energy.

关键词： Alkaline water electrolyzer hydrogen production co.trol strategy system modeling

激光选区熔化Inco.el 625合金的高温热腐蚀行为

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中国有色金属学报 2024年第6期34卷 2030-2042页

作者：赵斌王琪霖任延杰韩林虎蒋东方长沙理工大学能源与动力工程学院长沙410083 浙江科技大学机械与能源工程学院杭州310023 国网能源研究院有限公司北京102209

采用电化学阻抗谱对比研究了激光选区熔化(Selective laser melting,SLM)和轧制Inco.el 625合金在600℃覆盖50%KCl+50%Na_(2)SO_(4)(质量分数)盐膜时的电化学腐蚀行为。结果表明:SLM Inco.el 625合金的腐蚀电化学阻抗谱呈双容抗特征,腐... 详细信息

采用电化学阻抗谱对比研究了激光选区熔化(Selective laser melting,SLM)和轧制Inco.el 625合金在600℃覆盖50%KCl+50%Na_(2)SO_(4)(质量分数)盐膜时的电化学腐蚀行为。结果表明:SLM Inco.el 625合金的腐蚀电化学阻抗谱呈双容抗特征,腐蚀过程受荷电离子迁移控制;轧制Inco.el 625合金由高频段的容抗弧和低频段的直线组成,表明腐蚀受扩散控制;SLM Inco.el 625合金的腐蚀产物层为Cr_(2)O_(3)/Ni_(3)S_(2)多层交替结构,而轧制Inco.el 625合金表面腐蚀产物由Cr_(2)O_(3)和NiO的混合物组成,存在明显的内硫化现象;SLM Inco.el 625合金较多的位错及亚晶粒促进了铬元素向外扩散并与氧发生反应,改变了合金表面的硫分压,进而影响了合金表面腐蚀产物膜的组成及结构。

关键词：热腐蚀激光选区熔化 Inco.el 625 电化学阻抗谱位错密度

Neoadjuvant camrelizumab(an anti-PD-1 antibody)plus chemotherapy or apatinib(a VEGFR-2 inhibitor)for initially unresectable stage II–III non-small-cell lung cancer:a multicentre,two-arm,phase 2 exploratory study

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Signal Transduction and Targeted Therapy 2024年第7期9卷 3015-3023页

作者： Haoran Xia han Zhang Zheng Ruan Huibiao Zhang Liangdong Sun Hezhong Chen Yongxin Zhou Lele Zhang Dongliang Bian Xinsheng Zhu Jing Zhang Fenghuan Sun Huansha Yu Nan Song Xiaogang Liu Yuming Zhu Haiping Zhang Wenxin He Jian Chen Jie Yang Guohan Chen Shiliang Xie dongfang Tang Xiaomiao Zhang Liang Duan Deping Zhao Qinchuan Li Peng Zhang Gening Jiang Department of Thoracic Surgery Shanghai Pulmonary HospitalTongji University School of MedicineShanghaiChina Department of Thoracic Surgery Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina Department of Thoracic Surgery Huadong Hospital Affiliated to Fudan UniversityShanghaiChina Department of Thoracic Surgery Changhai HospitalNaval Medical UniversityShanghaiChina Department of Thoracic-Cardiovascular Surgery Tongji HospitalTongji University School of MedicineShanghaiChina Central Laboratory Shanghai Pulmonary HospitalTongji University School of MedicineShanghaiChina Experimental Animal Center Shanghai Pulmonary HospitalTongji University School of MedicineShanghaiChina Department of Onco.ogy Shanghai Pulmonary HospitalTongji University School of MedicineShanghaiChina Department of Thoracic Surgery Shanghai East HospitalTongji University School of MedicineShanghaiChina

This multicentre,two-arm,phase 2 study aimed to explore the efficacy and safety of neoadjuvant camrelizumab plus chemotherapy or apatinib in patients with initially unresectable stage II–III non-small-cell lung cancer(NSCLC).Eligible patients regardless of PD-L1 expression received neoadjuvant camrelizumab 200 mg and platinum-doublet chemotherapy every 3 weeks(arm A)or those with PD-L1-positive tumors received neoadjuvant camrelizumab and apatinib 250 mg once daily(arm B),for 2–4 cycles,followed by *** primary endpoint was major pathological response(MPR)*** patients in arm A and 21 in arm B were *** rates were 50.0%(15/30)in arm A and 42.9%(9/21)in arm B,with all patients achieving R0 *** these patients,the MPR and pathological co.plete response rates were both 20.0%(95%CI 4.3–48.1)in arm A and were 55.6%(95%CI 21.2–86.3)and 11.1%(95%CI 0.3–48.2)in arm B,*** co.responding objective response rates were 33.3%(95%CI 11.8–61.6)and 55.6%(95%CI 21.2–86.3).With a median follow-up of 22.4 months(95%CI 19.0–26.0),the median event-free survival was not reached(NR;95%CI 13.6-NR)in arm A and 16.8 months(95%CI 8.6-NR)in arm *** 3 or above treatment-related adverse events occurred in eight(26.7%)patients in arm A and three(14.3%)in arm *** analysis showed baseline TYROBP expression was predictive of treatment response in arm *** camrelizumab plus chemotherapy or apatinib exhibits preliminary efficacy and manageable toxicity in patients with initially unresectable stage II–III NSCLC.

关键词： Surgery chemotherapy treatment

Evolution of In783 alloy in microstructure and properties enduring different service times

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Rare Metals 2024年第1期43卷 334-341页

作者： Zhong-Shuai han Jin-Feng Du Jun Liang Zheng Zhang School of Material Science and Engineering Beihang UniversityBeijing 100191China Shenhua Guohua(Beijing)electric Power Research Institute co. Ltd.Beijing 100025China

Impact, tensile, and fatigue tests were performed in In783 alloy serving 4000, 23,000 and 48,000 h. The microstructure was then analysed by optical microsco.y(OM), scanning electron microsco.y(SEM), and transmission electron microsco.y(TEM) to probe the relationship between microstructure and properties. The results show that a new Ni_(5)Al_(3) phase is found, which grows gradually in β phase with serving time increasing,destroying the martensitic structure of the β phase, and degenerating the toughness of the β phase(approximately13.88% reduction). Therefore, the degradation of the βphase results in a sharp dropping of the resistance to stress accelerated grain boundary oxygen(SAGBO) during serving;thus, the intergranular fracture morphology degree increases with duration of service(almost 40% increase from the fractured surface). In addition, the strength of alloy will be gradually enhanced when the γ'phase beco.es relatively bulky with serving time increasing due to co.siderable distortion of the dislocations as a result of the spacing of individual particles, in which any movement of the dislocation will have to overco.e a larger number of obstacles per unit length.

关键词： In783 Microstructure Properties βphase Ni_(5)Al_(3)phase

On the electric behaviour of co.ductive grease inside the co.tact zone

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Friction 2024年第4期12卷 683-697页

作者： Yuxin ZHOU Jinjie LIU Xinming LI He CHONG Bo han Qinghua BAI SKF(Shanghai)Automotive Technologies co. Ltd.Shanghai 201814China School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266250China

co.ductive grease has been co.sidered as a potential solution in addressing electric erosion issue inside motor *** the co.ductive grease performance,especially the electric and tribological behaviour is crucial for its *** paper co.bines bulk grease characterization and co.tact film study co.sidering both electrical and tribological loading *** results show that the electric performance for the selected co.ductive grease sample is electric field dependent,including both frequency and voltage *** film impedance inside the co.tact area is closely related to the external electric field,running co.dition,and lubrication *** following film impedance calculation tells that not only bulk grease electric parameters,but the co.tact parameter,lubricant film co.tour and lubrication co.dition should be co.sidered when performing the overall bearing electrical modelling.

关键词： electric erosion lubricant co.ductivity grease film impedance

An ultra-sensitive biosensor for circulating microRNA detection with Fe single-atom enhanced cathodic luminol-O_(2) electrochemiluminescence

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Nano Research 2024年第9期17卷 7926-7934页

作者： Yudie Sun Yunxiang han Mingyue Wang Mingfu Ye Konglin Wu Kui Zhang School of Chemistry and Chemical Engineering Anhui University of TechnologyMa'anshan 243032China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEQingdao University of Science and TechnologyQingdao 266042China Engineering Research Center of Biofilm Water Purification and Utilization Technology of Ministry of Education Anhui University of TechnologyMa'anshan 243032China

Circulating microRNAs(miRNAs)play a pivotal role in the occurrence and development of acute myocardial infarction(AMI),and precise detection of them holds significant clinical *** development of luminol-based luminophores in the field of electrochemiluminescence(ECL)for miRNA detection has been significant,while their effectiveness is hindered by the instability of co.reactant hydrogen peroxide(H_(2)O_(2)).In this work,an iron single-atom catalyst(Fe-PNC)was employed for catalyzing the luminol-O_(2) ECL system to achieve ultra-sensitive detection of myocardial *** miRNA triggers a hybridization chain reaction(HCR),resulting in the generation of a DNA product featuring multiple sticky ends that facilitate the attachment of Fe-PNC probes to the electrode *** Fe-PNC catalyst exhibits high promise and efficiency for the oxygen reduction reaction(ORR)in electrochemical energy co.version *** resulting ECL biosensor allowed ultrasensitive detection of myocardial miRNA with a low detection limit of 0.42 fM and a wide linear range from 1 fM to 1.0 ***,it demonstrates exceptional performance when evaluated using serum samples co.lected from patients with *** work expands the application of single-atom catalysis in ECL sensing and introduces novel perspectives for utilizing ECL in disease diagnosis.

关键词： circulating miRNAs single-atom catalyst luminol-O_(2) electrochemiluminescence hybridization chain reaction

DG Hosting Capacity Assessment co.sidering Dependence Among Wind Speed,Solar Radiation,and Load Demands

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1011-1025页

作者： Junyi Yang Jiangmin Bao Yuhan Hou han Wu Qiang Li Yue Yuan Hohai University Nanjing 211100China State Grid Jiangsu electric Power co. Ltd.Suzhou Power Supply BranchSuzhou 215004China Nanjing Institute of Technology Nanjing 211167China electric Power Research Institute of State Grid Jiangsu electric Power co.ltd. Nanjing 211103China IEEE CSEE

Dependence of distributed generation(DG)outputs and load plays an essential role in renewable energy *** paper presents a novel DG hosting capacity(DGHC)evaluation method for distribution networks co.sidering highdimensional dependence relations among solar radiation,wind speed,and various load types(i.e.,co.mercial,residential,and industrial).First,an advanced dependence modeling method called regular vine(R-vine)is applied to capture the co.plex dependence structure of solar radiation,wind speed,co.mercial loads,industrial loads,and residential ***,a chanceco.strained DGHC evaluation model is employed to figure out maximum hosting capacity of each DG and its optimal allocation plan with different operational ***,a Benders deco.position algorithm is also employed to reduce co.putational *** proposed approaches are validated using a set of historical data from *** show dependence among different DGs and loads has significant impact on hosting *** also suggest using the R-vine model to capture dependence among distributed energy resources(DERs)and *** finding provides useful advice for distribution networks in installing renewable energy generations.

关键词： Benders deco.position co.relation DG hosting capacity regular vine

Thermal-Eco.omic co.parative Analysis and Optimization of the Maisotsenko Gas Turbine Cycle under Different co.figurations

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Journal of Thermal Science 2024年第06期33卷 2151-2165页

作者： SHI Qile HE Weifeng YAO Zhaohui GAO Yanfei SU Pengfei han Dong Advanced Energy co.servation Research Group College of Energy and Power EngineeringNanjing University of Aeronautics and Astronautics co.laborative Innovation Center for Advanced Aero-Engine State Key Laboratory of Long-Life High Temperature Materials Dongfang Electric Corporation Dongfang Turbine Co.LTD

The widespread adoption of Maisotsenko gas turbine cycle(MGTC) is significantly co.strained by the design and manufacturing co.plexity of the *** proposition of innovative approaches to regulate the water carrying capacity and operational environment of the saturator,co.pled with the performance and eco.omic evaluation of systems under various co.figurations,can substantially facilitate its co.mercial *** the co.ventional two-stage MGTC system that solely co.prises afterco.ling and regenerative processes,this study proposes a three-stage MGTC system with an interco.ling process(IMGTC),which co.siders the reuse of co.ling water and energy *** pricing allocation and energy depreciation characteristics of co.ponents are analyzed,and the impact of key variables is ***,eco.omic optimization of the system is co.ducted using ISIGHT to identify the optimal parameter co.bination and *** results indicate that the saturator price of IMGTC is lower and its exergy efficiency is higher than that of *** average water capacity of the IMGTC saturator is only 57.4% of that of the MGTC saturator,but the average exergy efficiency of IMGTC is 1.1% higher than that of ***,external parameters all lead to the levelized co.t of electricity(Lco.).Thermo-eco.omic optimization shows that the optimal Lco. of IMGTC is 0.26%lower than that of *** study co.firms the feasibility of IMGTC,as well as its thermodynamic and eco.omic advantages over MGTC.

关键词： exergy efficiency interco.ling levelized co.t of electricity Maisotsenko gas turbine cycle thermo-eco.omic optimization

Electromagnetic characteristic analysis and design of a linear motor used for ultra-high-speed EMS maglev train

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Science China(Technological Sciences) 2024年第6期67卷 1957-1973页

作者： GAO han SHI TingNa GAO XinMai LEI YanXiao YAN Dong GUO LiYan YAN Yan co.lege of electrical Engineering Zhejiang UniversityHangzhou310027China Zhejiang University Advanced electrical Equipment Innovation Center Hangzhou311107China State Key Laboratory of High-speed Maglev Transportation Technology Qingdao266100China CRRC Qingdao Sifang co.ltd. Qingdao266111China

The operating speed of the co.mercial electromagnetic suspension(EMS)maglev train has been over 430 km/h,making it the fastest means of land *** the increasing demands of people traveling,it is necessary to further improve the operating speed of maglev *** to examine whether the existing EMS system can meet the requirements of ultra-highspeed operation(more than 600 km/h),the electromagnetic characteristics of an EMS linear motor under the operating speed of 600–1000 km/h fed by a square-wave voltage supply is investigated in this ***,an electromagnetic field model of the EMS system under the square-wave voltage supply is established to investigate its electromagnetic performance,e.g.,the characteristics of phase current,the magnetic flux density,and the electromagnetic ***,the relationship between the harmonic co.ponents of the air-gap magnetic flux density and electromagnetic force is investigated using the two-dimensional fast Fourier transform(2D-FFT)to reveal the mechanism of electromagnetic force ***,to address the issues of excessive armature current density and significant electromagnetic force ripple,the linear motor is re-designed by enlarging the stator slot area and reshaping the mover's main magnetic ***,the Taguchi method is used to further improve the electromagnetic characteristics of the linear electric ***,the effectiveness of the proposed optimal design is validated by the finite-element analysis(FEA)based co.simulation.

关键词： ultra-high-speed maglev transportation electromagnetic suspension(EMS) linear motor electromagnetic force ripple suppression