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Energy-Saving Optimization Study on 700°C Double Reheat Advanced Ultra-Supercritical Coal-Fired Power Generation System

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Journal of Thermal Science 2023年第1期32卷 30-43页

作者： WANG Jing DUAN Liqiang YANG Jinfu YANG Ming JING Yutian TIAN Liguo School of Energy Power and Mechanical Engineering North China Electric Power University Institute of Engineering Thermophysics Chinese Academy of Sciences

700°C double reheat advanced ultra-supercritical power generation technology is one of the most important development directions for the efficient and clean utilization of coal. To solve the great exergy loss problem caused by the high superheat degrees of regenerative steam extractions in 700°C double reheat advanced ultra-supercritical power generation system, two optimization systems are proposed in this paper. System 1 is integrated with the back pressure extraction steam turbine, and system 2 is simultaneously integrated with both the outside steam cooler and back pressure extraction steam turbine. The system performance models are built by the Ebsilon Professional software. The performances of optimized systems are analyzed by the unit consumption method. The off-design performances of optimization systems are analyzed. The results show that: the standard power generation coal consumption rates of optimization systems 1 and 2 are decreased by 1.88 g·(kW·h)–1, 2.97 g·(kW ·h)–1compared with that of the 700°C reference system; the average superheat degrees of regenerative steam extractions of optimized systems 1 and 2 are decreased by 122.2°C, 140.7°C(100% turbine heat acceptance condition), respectively. The comparison results also show that the performance of the optimized system 2 is better than those of the optimized system 1 and the 700°C reference system. The power generation standard coal consumption rate and the power generation efficiency of the optimized system 2 are about 232.08 g·(kW ·h)–1and 52.96%(100% turbine heat acceptance condition), respectively.

关键词： 700 °C advanced ultra-supercritical (A-USC) double reheat cycle extraction steam superheat degree unit consumption method system optimization

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Fabrication and characterization of laminated Ti-(TiB + La2O3)/Ti composite

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Progress in Natural Science:Materials International 2015年第5期25卷 453-459页

作者： Yuanfei Han Hongqiang duan Weijie Lu liqiang Wang Di Zhang State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University

The incorporation of ceramic particulate reinforcements into titanium alloys can improve the specific strength and specific stiffness,while inevitably reduce the plasticity and ductility.In this study,in situ synthesized multilayer Ti-(TiB +LaO)/Ti composite was designed by learning from the microstructure of nature biological materials with excellent mechanical properties.The Ti-(TiB + LaO)/Ti composite with unique characteristic of laminated structure was prepared by combined powder metallurgy and hot rolling.The method has the synthesize advantages with in-situ reaction of Ti and LaBat high temperature and controllability of reinforcements size and constituent phases in composites.The result shows that the pores in the as sintered laminated structure composite completely disappeared after hot rolling at 1050℃.The agglomerated reinforcement particles were well dispersed and distributed uniformly along the rolling direction.The thickness of pure Ti layer and(TiB+LaO)/Ti composite layer decreased from 1 mm to about 200 μm.Meanwhile,the grains size was refined obviously after rolling deformation.The room temperature tensile test indicates that the elongation of the laminated Ti-(TiB + LaO)/Ti composite improved from 13%to 17%in comparison with the uniform(TiB + LaO)/Ti composite,while the tensile strength had little change.It provides theoretical and experimental basis for fabricating the novel high performance laminated Ti-(TiB + LaO)/Ti composites.

关键词： Titanium matrix composites Laminated structure Microstructure Mechanical properties

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内嵌加热管束反应床Ca(OH)_(2)/CaO热化学储能性能研究

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中国电机工程学报 2022年第10期42卷 3680-3690页

作者：刘旭光段立强华北电力大学能源动力与机械工程学院北京市昌平区102206

热化学储能在能量密度以及能量的长期存储上较显热储能和潜热储能2种方式具有较大的优势,并且在远距离输送上具有比较小的能量损失。采用热化学储能中的Ca(OH)_(2)/CaO储能体系进行数值研究,旨在探索内嵌加热管束反应床的尺寸以及加热... 详细信息

热化学储能在能量密度以及能量的长期存储上较显热储能和潜热储能2种方式具有较大的优势,并且在远距离输送上具有比较小的能量损失。采用热化学储能中的Ca(OH)_(2)/CaO储能体系进行数值研究,旨在探索内嵌加热管束反应床的尺寸以及加热温度与反应床储热性能之间的关系。针对多孔反应床内的储能反应建立一个物化模型,采用数值计算的方法将反应床反应过程中的传热传质过程进行量化分析。以反应床的储能率表征反应床的储热性能并分析不同工况下的反应模式。结果表明内嵌管束加热方式比反应床外壁加热有更高的储热性能,尽管前者的加热面积远小于后者,但与后者相比,其储能率仍提高3.8%左右。另外,研究发现在不同的反应率下反应床尺寸变化对储能率的影响效果不同。对反应床的加热温度变化研究表明,不同的尺寸参数对加热温度的变化敏感程度也是不同的。对于文中反应床,当额定加热温度为863K,半径为120 mm,高650mm时反应床的储能效率达到最高。

关键词：热化学储能 Ca(OH)_(2)/CaO 数值模拟多孔反应床内嵌加热管

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不同运行策略下燃气轮机联合循环变工况热经济性能分析

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中国电机工程学报 2021年第14期41卷 4912-4922页

作者：王振段立强华北电力大学能源动力与机械工程学院北京市昌平区102206

燃气轮机联合循环发电已成为当前火力发电的主要发展方向之一。基于热经济学结构理论建立了燃气轮机联合循环成本模型,分析不同燃机运行策略对燃气轮机联合循环机组单位产品热经济学成本的影响,并引入评价指标对燃气轮机联合循环进行技... 详细信息

燃气轮机联合循环发电已成为当前火力发电的主要发展方向之一。基于热经济学结构理论建立了燃气轮机联合循环成本模型,分析不同燃机运行策略对燃气轮机联合循环机组单位产品热经济学成本的影响,并引入评价指标对燃气轮机联合循环进行技术经济性分析。分析了天然气价格和非能源成本对各组件的单位产品热经济学成本的影响。结果表明,调节燃机运行策略可以降低机组的单位产品热经济学成本。通过分析各个组件的性能评价指标值,结果表明,对于压气机和蒸汽轮机,减少投资成本是主要改进方向,对于燃烧室通过提高燃烧室的燃烧效率,减少燃料化学能与烟气热能转换损失来降低由于不可逆损失引起的负熵成本。通过灵敏度分析,结果表明,天然气价格的变化对燃烧室的单位热经济学成本影响最大,而非能量成本对压气机,燃气透平和蒸汽轮机的单位热经济学成本影响最大。

关键词：燃气轮机联合循环热经济学结构理论单位热经济学成本燃机运行策略

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Catalytically enhanced thin and uniform TaS2 nanosheets for hydrogen evolution reaction

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Frontiers of Materials Science 2018年第3期12卷 239-246页

作者： Infant RAJ Yongli duan Daniel KIGEN Wang YANG liqiang HOU Fan YANG Yongfeng LI State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

Though the transition-metal dichalcogenides （TMDs） were proven to have a better performance on the hydrogen evolution reaction （HER）, the bulk production of active TMD materials remains a challenging work. This report overcomes those barriers by showing a simple procedure to synthesize TaS2 nanosheets through modifying the arc discharge process. The usage of chloride as the transporting agent reduces the growth period of the formed TaS2 with active edge sites. TaS2 is found to have a uniform thickness （4 nm） with high crystallinity and adopt a 2H polytype （double-layered hexagonal） structure. The as-synthesized TaS2 has superior activity for HER with the potential of 280 mV.

关键词： hydrogen evolution reaction TaS2 nanosheets arc disharge active edge sites

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基于信道化技术的数字阵列雷达CS103测量方法研究

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现代雷达 2023年第6期45卷 87-91页

作者：赵立强段蕾南京电子技术研究所江苏南京210039

基于数字阵列雷达CS103电磁兼容测试需求,针对已高度集成化的数字接收机对外仅经光纤下传AD采样数字数据的情况,在GJB 152A-1997测量方法框架下,对CS103通用测试布置图中的输出监测器设备进行了创新,提出选用高速、大容量AD记录存储设... 详细信息

基于数字阵列雷达CS103电磁兼容测试需求,针对已高度集成化的数字接收机对外仅经光纤下传AD采样数字数据的情况,在GJB 152A-1997测量方法框架下,对CS103通用测试布置图中的输出监测器设备进行了创新,提出选用高速、大容量AD记录存储设备和基于信道化技术构建CS103项数字接收机性能评估系统相结合的监测方法。经仿真和实际测试表明,该方法也可用于数字接收机的CS104、CS105测试项,能够评估包括雷达在内的各数字接收机的互调抑制度、无用信号抑制度和交调抑制度等性能指标,适用于工程应用。

关键词：数字阵列雷达数字接收机电磁兼容

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Energy-Saving Optimization Study on 700℃ Double Reheat Advanced Ultra-Supercritical Coal-Fired Power Generation System

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Journal of Thermal Science 2023年第1期32卷 30-43页

作者： WANG Jing DUAN Liqiang YANG Jinfu YANG Ming JING Yutian TIAN Liguo School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China

700°C double reheat advanced ultra-supercritical power generation technology is one of the most important development directions for the efficient and clean utilization of coal.To solve the great exergy loss problem caused by the high superheat degrees of regenerative steam extractions in 700°C double reheat advanced ultra-supercritical power generation system,two optimization systems are proposed in this paper.System 1 is integrated with the back pressure extraction steam turbine,and system 2 is simultaneously integrated with both the outside steam cooler and back pressure extraction steam turbine.The system performance models are built by the Ebsilon Professional software.The performances of optimized systems are analyzed by the unit consumption method.The off-design performances of optimization systems are analyzed.The results show that:the standard power generation coal consumption rates of optimization systems 1 and 2 are decreased by 1.88 g·(kW·h)^(–1),2.97 g·(kW·h)^(–1)compared with that of the 700°C reference system;the average superheat degrees of regenerative steam extractions of optimized systems 1 and 2 are decreased by 122.2°C,140.7°C(100%turbine heat acceptance condition),respectively.The comparison results also show that the performance of the optimized system 2 is better than those of the optimized system 1 and the 700°C reference system.The power generation standard coal consumption rate and the power generation efficiency of the optimized system 2 are about 232.08 g·(kW·h)^(–1)and 52.96%(100%turbine heat acceptance condition),respectively.

关键词： 700℃ advanced ultra-supercritical(A-USC) double reheat cycle extraction steam superheat degree unit consumption method system optimization

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650℃一次再热超超临界燃煤发电机组设计优化

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机械工程学报 2022年第22期58卷 416-425页

作者：王婧段立强杨名华北电力大学能源动力与机械工程学院北京102206

针对650℃一次再热超超临界燃煤发电机组热力系统抽汽过热度较高、空气预热器换热温差较大的问题,在650℃基准机组基础上提出加装2级前置式蒸汽冷却器(Outside steam coolers, OSCs)(方案1)和采用前置式空气预热器+OSCs(方案2)进行性能... 详细信息

针对650℃一次再热超超临界燃煤发电机组热力系统抽汽过热度较高、空气预热器换热温差较大的问题,在650℃基准机组基础上提出加装2级前置式蒸汽冷却器(Outside steam coolers, OSCs)(方案1)和采用前置式空气预热器+OSCs(方案2)进行性能对比研究。通过Ebsilon建模,采用单耗分析法对比了650℃一次再热机组在变工况下的能耗分布情况。结果表明:650℃一次再热机组发电煤耗比600℃二次再热机组降低10.67g·(kW·h)^(-1),比700℃一次再热机组高9.77 g·(kW·h)^(-1)(100%THA),节煤效果显著。650℃一次再热不同优化方案中,方案2在各工况下性能均优于方案1和基准机组,方案2发电煤耗246.71 g·(kW·h)^(-1)(100%THA),比方案1降低1.99 g·(kW·h)^(-1),比基准机组降低3.32 g·(kW·h)^(-1),在低负荷下仍具有良好的节煤效果。

关键词： 650℃ 先进超超临界(A-USC) 一次再热抽汽过热度外置式蒸汽冷却器(OSC) 单耗分析

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HUNK inhibits cargo uptake and lysosomal traffic in the caveolar pathway via the AGAP3/ARF6

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Science Bulletin 2024年第2期69卷 173-178页

作者： Siyuan Jiang Xiaoqi Han Tihui Liu Ying He Zidong Zhao Tongfeng Liu Shuwen Cheng Jihang Zhang liqiang duan Yajuan Liu Tianyou Cheng Yong Liu Qinong Ye Shan Gao Zhongda Hospital Medical SchoolAdvanced Institute for Life and HealthSoutheast UniversityNanjing 20096China Medical School of Guizhou University Guiyang 550025China Shanxi Academy of Advanced Research and Innovation Taiyuan 030032China Zhongda Hospital School of Life Sciences and TechnologyAdvanced Institute for Life and HealthSoutheast UniversityNanjing 210096China Nanjing University Medical School Nanjing 210046China Hubei Key Laboratory of Cell Homeostasis College of Life SciencesTaiKang Center for Life and Medical SciencesWuhan UniversityWuhan 430072China Department of Medical Molecular Biology Beijing Institute of BiotechnologyCollaborative Innovation Center for Cancer MedicineBeijing 100850China

Endocytosis is a crucial cellular process that takes up cargos by enclosing them in membrane-bound vesicles,and transports cargos to different parts of the cell,such as the lysosomes[1].Endocytosis is classified into several mechanistically and morphologically pathways,including clathrin-mediated endocytosis(CME)and caveolae-mediated endocytosis(CavME)[1,2].

关键词： endocytosis cargo uptake

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Electrohydrodynamic printing for high resolution patterning of flexible electronics toward industrial applications

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InfoMat 2024年第2期6卷 28-56页

作者： Zhouping Yin Dazhi Wang Yunlong Guo Zhiyuan Zhao liqiang Li Wei Chen Yongqing duan State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhanthe People's Republic of China Optics Valley Laboratory Wuhanthe People's Republic of China Key Laboratory for Micro/Nano Technology and System of Liaoning Province Dalian University of TechnologyDalianthe People's Republic of China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingthe People's Republic of China Institute of Molecular Aggregation Sciences Tianjin UniversityTianjinthe People's Republic of China

Electrohydrodynamic(EHD)printing technique,which deposits micro/nanostructures through high electric force,has recently attracted significant research interest owing to their fascinating characteristics in high resolution(<1μm),wide material applicability(ink viscosity 1–10000 cps),tunable printing modes(electrospray,electrospinning,and EHD jet printing),and compatibility with flexible/wearable applications.Since the laboratory level of the EHD printed electronics'resolution and efficiency is gradually approaching the commercial application level,an urgent need for developing EHD technique from laboratory into industrialization have been put forward.Herein,we first discuss the EHD printing technique,including the ink design,droplet formation,and key technologies for promoting printing efficiency/accuracy.Then we summarize the recent progress of EHD printing in fabrication of displays,organic field-effect transistors(OFETs),transparent electrodes,and sensors and actuators.Finally,a brief summary and the outlook for future research effort are presented.

关键词： display electrohydrodynamic printing flexible electronics organic field-effect transistor printhead

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