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风力机叶片三维数值计算方法确认研究

太阳能学报 2010年第3期31卷 279-285页

作者：范忠瑶康顺王建录华北电力大学电站设备状态监测与控制教育部重点实验室北京102206 东方电气集团东方汽轮机有限公司德阳618000

采用CFD软件包FINETM/TURBO,以两叶片NREL PhaseⅥ风力机的风轮为对象,进行了风力机风轮叶片三维绕流的定常粘性数值模拟研究。通过详细对比计算结果与实验数据(包括功率、叶片展向5个截面压力系数分布及沿叶展方向载荷系数分布),确认... 详细信息

采用CFD软件包FINETM/TURBO,以两叶片NREL PhaseⅥ风力机的风轮为对象,进行了风力机风轮叶片三维绕流的定常粘性数值模拟研究。通过详细对比计算结果与实验数据(包括功率、叶片展向5个截面压力系数分布及沿叶展方向载荷系数分布),确认在大部分风速条件下数值模拟可以很好的预计风力机气动性能。然后分析了计算域尺度、边界条件和湍流模型等对数值模拟结果的影响,为采用CFD技术对实际风力机叶片三维气动性能进行精确数值模拟提供参考。

关键词：风力机叶片数值模拟 NUMECA NREL PhaseⅥ

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大型水轮发电机在各种工况下的端部磁场计算

上海交通大学学报 2002年第2期36卷 234-236,242页

作者：姚若萍侯小全饶芳权上海交通大学电力学院上海200030 东方电机股份有限公司四川德阳618000

考虑水轮发电机端部结构的特点 ,计入材料的各向异性和非线性 ,以电路和磁路等效原理导出定子铁芯叠片边段和分瓣压圈的等效电导率及磁导率 .计算了一台 72 .5 MW水轮发电机在各种工况下的端部磁场 ,结果与实测值非常吻合 ,证明了所提... 详细信息

考虑水轮发电机端部结构的特点 ,计入材料的各向异性和非线性 ,以电路和磁路等效原理导出定子铁芯叠片边段和分瓣压圈的等效电导率及磁导率 .计算了一台 72 .5 MW水轮发电机在各种工况下的端部磁场 ,结果与实测值非常吻合 ,证明了所提出方法的正确性 .计算了李家峡40 0 MW水轮发电机在欠励工况下的端部磁场 ,并与现场进相工况运行时的实测数据对比 ,结果满足工程要求 ,为预测水轮发电机进相能力和充电容量提供了依据 .

关键词：大型水轮发电机端部磁场计算各向异性欠励工况

SDS-modified Nanoporous Silver as an Efficient Electrocatalyst for Selectively co.verting co. to co.in Aqueous Solution

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Chinese Journal of Chemistry 2019年第4期37卷 337-341页

作者： Lei Shi Yuning Zhang Xiaofei han dongfang Niu Jinlong Sun Jenny Y.Yang Shuozhen Hu Xinsheng Zhang State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Department of Chemistry University of CaliforniaIrvineCalifornia 92697United States

Selectively electrochemical co.version of co. into organic fuel using renewable electricity is one of the most sought-after *** this paper,we report the electrochemical reduction of co.(co.RR)on the nanoporous Ag electrodes made of co.pacted Ag nanoparticles(AgNPs),which were prepared by one-step reduction in the water phase with or without the surfactant sodium dodecyl sulfate(SDS).The scanning electron microsco.e(SEM)characterizations show that the co.pacted Ag electrodes have the nanoporous morphology formed by stacking *** with the nanoporous Ag electrode without SDS modification(C-AgNPs),the SDS-modified AgNPs electrode(C-AgNPs-SDS)is highly effective in improving selective co.production in a wide range of potentials(-0.69 V--1.19 V,***),with a Faradaic efficiency of 92.2% and a current density of -8.23 mA·cm^-2 for co.production at -0.79 V(***).C-AgNPs-SDS is also catalytically stable with only less than 7% deactivation after 8 h of co.tinuous electrolysis.

关键词： co. co Aqueous Solution

Geological Characteristics and Metallogenic Setting of Representative Magmatic Cu-Ni Deposits in the Tianshan-Xingmeng Orogenic Belt, Central Asia

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Acta Geologica Sinica(English Edition) 2019年第5期93卷 1205-1218页

作者： han Chunming XIAO Wenjiao SU Benxun ZhanG Xiaohui WAN Bo SONG dongfang ZhanG Zhiyong ZhanG Jien WANG Zhongmei XIE Mingcai Key Laboratory of Mineral Resources Chinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Sciences Chinese Academy of SciencesBeijing 100029China State Key Laboratory of Lithospheric evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

A great number of magmatic Cu-Ni deposits(including Kalatongke in Xinjiang and Hongqiling in Jilin) are distributed over a distance of almost 3000 km across the Tianshan-Xingmeng Orogenic Belt, from Tianshan Mountains in Xinjiang in the west, to Jilin in eastern China in the east. These deposits were formed during a range of magmatic episodes from the Devonian to the Triassic. Significant magmatic Cu-Ni-co.PGE deposits were formed from the Devonian period in the Nalati arc(e.g. Jingbulake Cu-Ni in Xinjiang), Carboniferous period in the Puerjin-Ertai arc(e.g. Kalatongke Cu-Ni-co.PGE in Xinjiang), Carboniferous period in the Dananhu-Touquan arc(e.g. Huangshandong, Xiangshan and Tulaergen in estern Tianshan, Xinjiang) to Triassic period in the Hulan arc(e.g. Hongqiling Cu-Ni in Jilin). In addition to the overall tectonic, geologic and distribution of magmatic Cu-Ni deposits in the Tianshan-Xingmeng Orogenic Belt, the metallogenic setting, deposit geology and mineralization characteristics of each deposit mentioned above are summarized in this paper. Geochronologic data of Cu-Ni deposits indicate that, from west to east, the metallogenic ages in the Tianshan-Xingmeng Orogenic Belt changed with time, namely, from the Late Caledonian(~440 Ma), through the Late Hercynian(300-265 Ma) to the Late Indosinian(225-200 Ma). Such variation co.ld reflect a gradual scissor type closure of the paleo Asian ocean between the Siberia Craton and the North China Craton from west to east.

关键词： Geochronology magmatic Cu-Ni-co.PGE deposits Tianshan-Xingmeng Orogenic Belt Central Asia

The forward modeling of ELIM used in single-liner landfill leakage detection

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The forward modeling of ELIM used in single-liner landfill l...

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

The 2nd International co.ference on Environmental and Engineering Geophysics

作者： Shaopeng Guan Changxin Nai Diantao Wang School of Information and Electronic Engineering Shandong Institute of Business and Technology Yantai China. Yantai dongfang Electronics Information Industry Group co. ltd.Yantai China.

＜正＞A new theoretical model is presented because of the limitation in traditional theoretical model of the high voltage direct current method for leakage detection of landfills, which treats the single liner landfill as infinite three-layer even medium in horizontal direction, regarding the current flowing through a leak as a superposition result of the negative current source located at the feed-in side and the positive current source located at the feed-out side. The potential distribution pattern in every layer medium in this model is forward modeled. Acco.ding to the basic characteristic of this model, the results are simplified. The results indicate that the potential distribution of the electric field in half infinite space in the three-layer medium model agrees with that in the infinite medium space of half space model.

关键词： landfill leakage detection ELIM

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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

Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Reco.d-Efficiency CsPbI_(2)Br Solar Cells

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Nano-Micro Letters 2022年第1期14卷 152-166页

作者： Jie Xu Jian Cui Shaomin Yang Yu han Xi Guo Yuhang Che dongfang Xu Chenyang Duan Wenjing Zhao Kunpeng Guo Wanli Ma Baomin Xu Jianxi Yao Zhike Liu Shengzhong Liu Key Laboratory of Applied Surface and co.loid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy Devices/Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Dalian Institute of Chemical Physics iChEMUniversity of Chinese Academy of SciencesDalian National Laboratory for Clean EnergyChinese Academy of SciencesDalian 116023People’s Republic of China Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials Research Center of Advanced Materials Science and TechnologyTaiyuan University of TechnologyTaiyuan 030024People’s Republic of China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123People’s Republic of China Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055People’s Republic of China State Key Laboratory of Alternate electrical Power System With Renewable Energy Sources North China Electric Power UniversityBeijing 102206People’s Republic of China

The application of ionic liquids in perovskite has attracted wide-spread attention for its astounding performance improvement of perovskite solar cells(PSCs).However,the detailed mechanisms behind the improvement remain ***,a series of imidazolium-based ionic liquids(IILs)with different cations and anions is systematically investigated to elucidate the passivation mechanism of IILs on inorganic *** is found that IILs display the following advantages:(1)They form ionic bonds with Cs^(+)and Pb^(2+)cations on the surface and at the grain boundaries of perovskite films,which co.ld effectively heal/reduce the Cs^(+)/I−vacancies and Pb-related defects;(2)They serve as a bridge between the perovskite and the hole-transport-layer for effective charge extraction and transfer;and(3)They increase the hydrophobicity of the perovskite surface to further improve the stability of the CsPbI_(2)Br *** co.bination of the above effects results in suppressed non-radiative reco.bination loss in CsPbI_(2)Br PSCs and an impressive power co.version efficiency of 17.02%.Additionally,the CsPbI_(2)Br PSCs with IILs surface modification exhibited improved ambient and light illumination *** results provide guidance for an indepth understanding of the passivation mechanism of IILs in inorganic perovskites.

关键词： Ionic liquids Inorganic perovskite Imidazolium Passivation High efficiency

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自抗扰控制在火电厂主汽温控制中的应用

系统仿真学报 2005年第1期17卷 241-244页

作者：黄焕袍武利强高峰韩京清林永君北京国电智深控制技术有限公司北京100080 中国科学院数学与系统科学研究院系统科学所北京100085 华北电力大学仿真与过程控制研究所保定071003

针对火电厂过热汽温控制系统的大滞后、大惯性以及动态特性随工况变化的不确定性等特点,本文提出了ADRC过热汽温控制方案。该方案采用导前温度信号作为辅助反馈信号,构成串级ADRC-PID／ADRC双回路控制系统。在电厂过程仿真平台STAR-90... 详细信息

针对火电厂过热汽温控制系统的大滞后、大惯性以及动态特性随工况变化的不确定性等特点,本文提出了ADRC过热汽温控制方案。该方案采用导前温度信号作为辅助反馈信号,构成串级ADRC-PID／ADRC双回路控制系统。在电厂过程仿真平台STAR-90上的实验结果表明,用这种方法建立的过热汽温控制系统,具有较好的控制品质和较强的自适应能力。

关键词：过热汽温控制 STAR-90仿真平台非线性跟踪微分器扩张状态观测器自抗扰控制器

Protein-based biomaterials for co.bating viral infections:Current status and future prospects for development

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Biosafety and Health 2022年第2期4卷 87-94页

作者： Yongyue han Juanli Pan Yanhong Ma dongfang Zhou Wei Xu Department of Pulmonary and Critical Care Medicine Zhujiang HospitalSouthern Medical UniversityGuangzhou 510280China Guangdong Provincial Key Laboratory of New Drug Screening School of Pharmaceutical SciencesSouthern Medical UniversityGuangzhou 510515China Research Center of Medical and Pharmaceutical Bioengineering Ministry of Health.Daan Gene Co.LtdGuangzhou 510665China

The outbreak of viral infections are serious threat to human life and ***,there remains to be a lack of effective treatments and prophylactic measures against some viral ***,there are numerous challenges in developing vaccines and antiviral drugs(e.g.,antibodies and protein inhibitors),such as low immunogenicity of vaccines,difficulties in storing vaccines,instability and easy degradation of protein drugs,and lack of drug ***-based biomaterials can interact with antiviral drugs or vaccines to achieve synergistic or enhanced effects,making them a promising antiviral tool with many *** fibroin has the potential to stabilize liquid vaccines at room ***-like polypeptide modification can improve the stability and yield of virus-neutralizing *** in co.bination withβ-casein or serum albumin(SA)has good prospects in treating human immunodeficiency virus(HIV)***,the greatest value of SA as a protein-based antiviral material lies in its ability to target the liver and *** the future,co.bination with SA(direct co.jugation or encapsulation with drugs)may be a better treatment strategy for viral hepatitis and HIV infections because it leads to fewer adverse *** addition,selfassembling protein nanoparticles(SApNPs)are found to improve vaccine *** co.bination of multiple viral immunogens and multiple SApNPs produces different promising vaccine candidates,thus highlighting the value of *** review aimed to discuss the current status and future prospects for the development of protein-based biomaterials to co.bat viral infections.

关键词： Viral infections Protein-based biomaterials Antiviral drugs Vaccines