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

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 comprising multiple alkaline water *** setups present various operational modes:independent operation and multi-electrolyzer parallelization,each with distinct advantages and *** study introduces an innovative configuration that incorporates a mutual lye mixer among electrolyzers,establishing a weakly coupled system that combines the advantages of two *** approach enables efficient heat utilization for faster hot-startup and maintains heat conservation post-lye interconnection,while preserving the option for independent operation after decoupling.A specialized thermal exchange model is developed for this topology,according to the dynamics of the lye *** study further details startup procedures and proposes optimized control strategies tailored to this structural *** heat from the caustic fully heats up the multiple electrolyzers connected to the lye mixing system,enabling a rapid hot start to enhance the system’s ability to track renewable energy.A control 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 considerable enhancement in operational efficiency,marked by an 18.28%improvement in startup speed and a 6.11%reduction in startup energy consumption 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 control strategy system modeling

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金属-硫脲配合物热力学数据的估算

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湖南科技大学学报（自然科学版） 2024年第2期39卷 97-101页

作者：张保平张恒王尹肖煜坤武汉科技大学省部共建耐火材料与冶金国家重点实验室湖北武汉430081 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室湖北武汉430081

金属-硫脲配合物的结构复杂,种类繁多,为了解决其由于缺少热力学数据难以进行热力学分析的问题,将金属-硫脲配合物看成由简单有机物和离子组成,采用PeHbo方程、Misenrd估算法和D. F. Taylor法分别计算金属-硫脲配合物和简单有机物及离... 详细信息

金属-硫脲配合物的结构复杂,种类繁多,为了解决其由于缺少热力学数据难以进行热力学分析的问题,将金属-硫脲配合物看成由简单有机物和离子组成,采用PeHbo方程、Misenrd估算法和D. F. Taylor法分别计算金属-硫脲配合物和简单有机物及离子的标准摩尔热容.利用гepцa方程计算金属-硫脲配合物的标准摩尔生成熵,根据简单有机物和离子的标准摩尔生成焓和计算得到的标准摩尔生成熵,计算金属-硫脲配合物的标准摩尔生成自由能.通过对金属-硫脲配合物热力学数据的估算,为实现热力学分析在金属-硫脲配合物中的应用提供理论基础.

关键词：金属-硫脲配合物标准摩尔生成自由能热力学数据估算

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基于数字化海图和大数据的自升式钻井平台就位技术

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海洋石油 2024年第1期44卷 88-91,101页

作者：张宝平龚明中海油能源发展股份有限公司工程技术分公司天津300452

针对海上油田拖航和就位过程中出现的恶劣天气临时升船、插桩历史资料缺失、就位滑移碰撞平台以及抛锚风险等复杂情况,开发了一套全局化、可视化、智能化决策系统。该系统以近海海域可视化海图为底板,将井场场址、生产平台、自升式平台... 详细信息

针对海上油田拖航和就位过程中出现的恶劣天气临时升船、插桩历史资料缺失、就位滑移碰撞平台以及抛锚风险等复杂情况,开发了一套全局化、可视化、智能化决策系统。该系统以近海海域可视化海图为底板,将井场场址、生产平台、自升式平台、拖航就位方面的基本信息“植入”到海图中,实现就位信息查询、拖航路线规划、钻井平台优选、精准覆盖分析、升船能力计算和就位方案设计等功能,为作业者提供一个可视化、动态化的查询、分析、评估和决策平台。通过近海120余座生产平台就位作业的实施,提高了自升式平台就位作业风险分析和预判能力,提高了就位效率,保障了海上油田就位作业安全,为数字化转型和智慧油田建设提供基础支持。

关键词：就位作业可视化电子海图拖航就位就位效率

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N掺杂木质素对钨的吸附

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河北大学学报（自然科学版） 2024年第3期44卷 269-280页

作者：张保平柯晶方诗媛李文灿武汉科技大学省部共建耐火材料与冶金国家重点实验室湖北武汉430081 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室湖北武汉430081

木质素经胺化和季铵化改性后制备了N掺杂木质素,并用于吸附钨,通过SEM-EDS和FTIR对吸附剂进行表征,考察pH值、钨初始质量浓度、吸附时间和吸附剂用量对吸附容量的影响,利用SEMEDS、FTIR和XPS分析揭示吸附过程的机制.结果表明,N掺杂木质... 详细信息

木质素经胺化和季铵化改性后制备了N掺杂木质素,并用于吸附钨,通过SEM-EDS和FTIR对吸附剂进行表征,考察pH值、钨初始质量浓度、吸附时间和吸附剂用量对吸附容量的影响,利用SEMEDS、FTIR和XPS分析揭示吸附过程的机制.结果表明,N掺杂木质素表面疏松多孔且含有大量的酚羟基、胺基和季铵官能团,在总钨浓度为0.005 mol/L、pH<4.7时,钨的存在形态为H_(2)W_(12)O_40)^(6-).H_(2)W_(12)O_(40)^(6-)通过与N掺杂木质素中氢键的静电吸引、胺基的配合和氯离子的离子交换作用而被吸附.在pH=4.0、钨初始质量浓度为800 mg/L、吸附时间为960 min的条件下,1 g/L N掺杂木质素对钨的饱和吸附容量为421.68 mg/g.吸附过程遵循Langmuir模型和准二级动力学模型,表明吸附过程为单分子层均质化学吸附.

关键词： N掺杂木质素钨吸附行为吸附机制

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Design and Accuracy Analysis of a Metamorphic CNC Flame Cutting Machine for Ship Manufacturing

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Chinese Journal of Mechanical Engineering 2016年第5期29卷 930-943页

作者： HU Shenghai zhang Manhui zhang baoping CHEN Xi YU Wei College of Mechanical and Electrical Engineering Harbin Engineering University

The current research of processing large size fabrication holes on complex spatial curved surface mainly focuses on the CNC flame cutting machines design for ship hull of ship manufacturing. However, the existing machines cannot meet the continuous cutting requirements with variable pass conditions through their fixed configuration, and cannot realize high-precision processing as the accuracy theory is not studied adequately. This paper deals with structure design and accuracy prediction technology of novel machine tools for solving the problem of continuous and high-precision cutting. The needed variable trajectory and variable pose kinematic characteristics of non-contact cutting tool are figured out and a metamorphic CNC flame cutting machine designed through metamorphic principle is presented. To analyze kinematic accuracy of the machine, models of joint clearances, manufacturing tolerances and errors in the input variables and error models considering the combined effects are derived based on screw theory after establishing ideal kinematic models. Numerical simulations, processing experiment and trajectory tracking experiment are conducted relative to an eccentric hole with bevels on cylindrical surface respectively. The results of cutting pass contour and kinematic error interval which the position error is from -0.975 mm to ＋0.628 mm and orientation error is from -0.01 rad to ＋0.01 rad indicate that the developed machine can complete cutting process continuously and effectively, and the established kinematic error models are effective although the interval is within a ＇large＇ range. It also shows the matching property between metamorphic principle and variable working tasks, and the mapping correlation between original designing parameters and kinematic errors of machines. This research develops a metamorphic CNC flame cutting machine and establishes kinematic error models for accuracy analysis of machine tools.

关键词： CNC cutting machine metamorphic principle accuracy analysis screw theory error model

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Curing mechanism of alkaline phenolic resin with organic ester

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China Foundry 2014年第5期11卷 447-451页

作者： Huang Renhe Wang Yanmin zhang baoping School of Chemical and Environmental Engineering Shandong University of Science and Technology School of Materials Science and Engineering Shandong University of Science and Technology

To study the curing mechanism of alkaline phenolic resin with organic ester, three esters were chosen to react with three systems - alkaline phenolic resin, potassium hydroxide aqueous solution containing phenol, and potassium hydroxide aqueous solution. The variations of pH, heat release and gel pH during the reactions were monitored and measured. Infrared spectroscopy （IR） and thermal gravity analysis （TG） techniques were used to characterize the curing reaction. It was found that organic ester is only partial y hydrolyzed and resin can be cured through organic ester hydrolysis process as wel as the reaction with redundant organic ester. The sequential curing mechanism of alkaline phenolic resin cured by organic ester was identified as fol ows： a portion of organic ester is firstly hydrolyzed owing to the effect of the strong alkaline; the gel is then formed after the pH decreases to about 10.8-10.88, meanwhile, the redundant organic ester （i.e. non-hydrolysis ester） starts the curing reaction with the resin. It has also been found that the curing rate depends on the hydrolysis velocity of organic ester. The faster the hydrolysis speed of the ester, the faster the curing rate of the resin.

关键词： organic ester alkaline phenolic resin curing process gel curing mechanism

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Multi-fluid Eulerian simulation of binary particles mixing and gas–solids contacting in high solids-flux downer reactor equipped with a lateral particle feeding nozzle

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Chinese Journal of Chemical Engineering 2021年第7期34卷 152-162页

作者： Qiang Zheng Jingxuan Yang Wenhao Lian baoping zhang Xueer Pan Zhonglin zhang Xiaogang Hao Guoqing Guan School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Technology North University of ChinaTaiyuan 030051China Laboratory of Energy Conversion Engineering Institute of Regional Innovation(IRI)Hirosaki University2-1-3 MatsubaraAomori 030-0813Japan

The performance of binary particles mixing and gas-solids contacting,which is considered qualitatively to have a significant influence on the heat transfer in internal heated circulating fluidized beds,is carefully investigated by means of a numerical approach in the newly developed high solids-flux downer lignite pyrolyzer(φ0.1 m×6.5 m).Since binary particles are used in this system,a reasonably validated 3 D,transient,multi-fluid model,in which three heat transfer modes relating to the convection,conduction and radiation are considered,is adopted to simulate the flow behavior,temperature profiles as well as volatile *** simulation results showed that the solids stream impinges the left wall surface initially and turns towards the right wall in the further downward direction and then shrinks during this process resulting in that the solids concentrate a little more at the central *** the further downward section of the downer,the particle flow disperses near the right wall and develops ***,the coal phase is slowly heated in the downer and it is found that most of the heat absorbed by the coal is from the convection heat transfer *** explore the heat transfer mechanism more quantitatively,two indexes(mixing index and contacting index)are proposed,and it is found that the mixing index initially increased fast and later remained at a relatively flat *** the contact index,it shows a trend with a first rising and then falling,finally rising ***,it is found that the convection heat transfer is closely correlated to the contacting status of gas-coal which indicates that the improving of the gas-coal contacting efficiency should be an effective way to strengthen the coal particle heating process.

关键词： CFD Multiphase flow Downer reactor Numerical simulation Heat transfer

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宫颈癌组织中TPX2的表达水平及其与放疗敏感性的相关性

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实用癌症杂志 2024年第6期39卷 921-924页

作者：刘红玲张保萍吕素英河南省郑州市金水区总医院 450003

目的探究宫颈癌组织中TPX2的表达水平及其与放疗敏感性的相关性。方法选取54例宫颈癌患者的宫颈癌组织活检标本作为观察组,选取同期收治的经病理诊断为正常宫颈组织标本35例作为对照组。通过免疫组化法检测TPX2蛋白在2组组织中的表达,... 详细信息

目的探究宫颈癌组织中TPX2的表达水平及其与放疗敏感性的相关性。方法选取54例宫颈癌患者的宫颈癌组织活检标本作为观察组,选取同期收治的经病理诊断为正常宫颈组织标本35例作为对照组。通过免疫组化法检测TPX2蛋白在2组组织中的表达,分析宫颈癌组织中TPX2蛋白的表达水平与患者年龄、病理类型、临床分期、病理分化程度以及淋巴结转移的关系。并对54例宫颈癌患者进行盆腔适形调强放疗治疗,在治疗后按照放疗疗效进行分组,CR为高敏感组,PR和SD为低敏感组,分析宫颈癌组织中TPX2蛋白表达与放疗敏感性的关系。结果TPX2蛋白在宫颈癌组织中的阳性表达率(87.04%)明显高于正常宫颈组织(8.57%),差异具有统计学意义(P0.05),与临床分期、分化程度以及淋巴结转移均有关(P<0.05),且TPX2蛋白在放疗低敏感组的表达强度明显高于高敏感组(P<0.05)。结论TPX2蛋白在宫颈癌组织中高表达,其表达水平与宫颈癌的临床分期、分化程度、淋巴结转移具有一定相关性。TPX2水平会影响宫颈癌放射治疗的敏感性,其高表达可导致肿瘤放射抵抗。TPX2表达水平对预测宫颈癌患者放疗疗效具有重要意义。

关键词：宫颈癌 TPX2 放疗敏感性相关性

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One-step uniform growth of magnesium hydride nanoparticles on graphene

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Progress in Natural Science:Materials International 2017年第1期27卷 81-87页

作者： Yuqin Huang Guanglin Xia Jie Chen baoping zhang Qian Li Xuebin Yu Department of Materials Science Fudan University State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering Shanghai University Materials Genome Institute Shanghai University

A simple solvent-free method to synthesize MgH;nanoparticles（MgH;NPs） uniformly grown on graphene nanosheets（GNs） has been reported in this paper. Based on the formation of MgH;by di-n-butylmagnesium(（C;H;）;Mg) thermal decomposition under hydrogen pressure, the GNs were added as matrix to hinder the agglomeration and growing of MgH;NPs. The fabricated MgH;/GNs nanocomposites, in which MgH;NPs were homogenously growing in the graphene matrix, have been synthesized by the favorable adsorption energy between（C;H;）;Mg and GNs. Resulting from the one-step solvent-free route, the generated MgH;NPs shows high hydrogen capacity and steady hydriding and dehydriding properties, without the interference of the synthetic medium. At the same time, the size of the fabricated MgH;NPs can be controlled by adjusting the mass ratio of MgH;to graphene, the various hydrogen pressure and temperature. Attributed to smaller size effect, well uniform distribution of high density MgH;NPs, and the agglomeration blocking ability of graphene,the MgH;/GNs-40 wt% exhibits the favorite hydrogen storage performance.

关键词： Hydrogen storage Magnesium hydride Graphene Nanoparticles Nanocomposite

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Heat-induced Internal Strain Relaxation and its Effect on the Microstructure of Polyacrylonitrile-based Carbon Fiber

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Journal of Materials Science & Technology 2014年第10期30卷 1051-1058页

作者： Denghua Li Chunxiang Lu Gangping Wu Yu Yang Zhihai Feng Xiutao Li Feng An baoping zhang National Engineering Laboratory for Carbon Fiber Technology Institute of Coal ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences National Key Laboratory of Advanced Functional Composite Materials Aerospace Research Institute of Materials & Processing Technology

The transformation of the internal strain and its effect on the microstructure of polyacrylonitrile-based carbon fiber during the high-temperature graphitization were investigated. The internal compressive strain within the carbon turbostratic structure was confirmed through a careful analysis by wide-angle X-ray diffraction and Raman spectroscopy. Heat-induced strain/stress relaxation along the fiber axis was observed and was found to have a profound effect on the structure of both the crystallites and microvoids. The results indicated that, the relaxation of residual strain changed the graphite layers from a wrinkled and distorted morphology to a straight and smooth one, and consequently led the crystallites to stack closely and orderly with increasing stack height. The strain relaxation also changed the morphology of crystallites and microvoids, resulting in an anisotropic growth for the latters.

关键词： Graphitizafion Internal strain Microstructures Nanocrystalline Carbon fiber

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