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Design and Key Technology of Oil-Free Centrifugal Air Compressor for hydrogen fuel cell

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CES Transactions on Electrical Machines and Systems 2022年第1期6卷 11-19页

作者： Hongjie Zhang Wenfei Yu Wei Hua School of Electrical Engineering Southeast UniversityNanjing210096China IEEE

For a 120 kW hydrogen fuel cell system,a centrifugal air compressor with fixed power of 22 kW fuel cell is ***,the theoretical calculation is carried out for the aerodynamic characteristics of a ultra-high-speed permanent magnet synchronous motor,an air compressor,and an aerodynamic foil ***,a prototype is trial-produced and a related test bench is built for test ***,both the simulation and test results indicate that the designed centrifugal air compressor meets the overall requirements of the hydrogen fuel cell system,and the relevant conclusions provide both theoretical and experimental references for the subsequent series development and design of the centrifugal air compressor.

关键词： hydrogen fuel cell Centrifugal air compressor Ultra-High speed permanent magnet synchronous motor Compressor impeller Air pressure foil bearing

Research of Perforated Panel Muffler for Twin Screw Air Compressor Applied in hydrogen fuel cell Vehicle

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Research of Perforated Panel Muffler for Twin Screw Air Comp...

Passive electrochemical hydrogen recombiner for hydrogen safety systems:prospects

2020中国汽车工程学会年会暨展览会

作者： Zhou Minglong Zhang Yiqin Chen Wenqing Zhang Zhiping He Zhilong Xing Ziwen Suzhou Academy Xi'an Jiaotong University School of Energy and Power Engineering Xi'an Jiaotong University State Key Laboratory of Air-conditioning Equipment and System Energy Conservation Gree Electric AppliancesINC

Twin screw air compressor will be widely used in hydrogen fuel cell commercial vehicle because of its high efficiency and strong adaptability,but its noise issue isn’t *** purpose of improving the noise of the compressor,the sound field of a perforated panel muffler based on three-dimensional finite element method was firstly *** the impacts of different structure parameters on the performance of muffler were investigate d.A multi-chamber perforated panel muffler with wide frequency bandwidth was *** noise reduction of the muffler was verified through the experimental *** results indicate that the resonant frequency decreases with the decrease of the perforation rate,perforation diameter and the increase of panel *** the perforation rate,suitable perforation diameter and panel thickness are conducive to increasing the sound absorption of resonant *** is a noise reduction about 11.4 dBA in average between the inlet and outlet of the muffler when the rotational speed changes from 9000 rpm to15000 *** the discharge pressure changes from 1.2 bar to 2.0 bar,noise reductions are all above 15 dBA and maximum noise reduction is 23.9 dBA.

关键词： hydrogen fuel cell commercial vehicle twin screw air compressor perforated panel muffler noise

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Nuclear Science and Techniques 2023年第6期34卷 215-224页

作者： A.V.Avdeenkov D.G.Bessarabov D.G.Zaryugin All Russian Research Institute for Nuclear Power Plants Operation JSC 25 Ferganskaya Str.MoscowRussia109507 HySA Center Faculty of EngineeringNorth-West UniversityPotchefstroom2520South Africa State Atomic Energy Corporation Rosatom 24 Bolshaya Ordynka Str.MoscowRussia119017

This paper presents the concept of a passive electrochemical hydrogen recombiner(PEHR).The reaction energy of the recombination of hydrogen and oxygen is used as a source of electrical energy according to the operating principle for hydrogen fuel cells to establish forced circulation of the hydrogen mixture as an alternative to natural circulation(as is not utilized in conventional passive autocatalytic hydrogen recombiners currently used in nuclear power plants(NPPs)).The proposed concept of applying the physical operation principles of a PEHR based on a fuel cell simultaneously increases both productivity in terms of recombined hydrogen and the concentration threshold of flameless operation(the‘ignition’limit).Thus,it is possible to reliably ensure the hydrogen explosion safety of NPPs under all conditions,including beyond-design *** experimental setup was assembled to test a laboratory sample of a membrane electrode assembly(MEA)at various hydrogen concentrations near the catalytic surfaces of the electrodes,and the corresponding current–voltage characteristics were *** simplest MEA based on the Advent P1100W PBI membrane demonstrated stable performance(delivery of electrical power)over a wide range of hydrogen concentrations.

关键词： Recombiner Catalytic ignition hydrogen explosion safety hydrogen fuel cell Membrane electrode assembly

Nafion-threaded MOF laminar membrane with efficient and stable transfer channels towards highly enhanced proton conduction

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Nano Research 2022年第4期15卷 3195-3203页

作者： Yan Wang Hexiang Gao Wenjia Wu Zhuofan Zhou Zhiwei Yang Jingtao Wang Yecheng Zou School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450003China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Fluorinated Functional Membrane Materials Shandong DongYue Polymer Material Co.LtdZibo 256400China

Porous laminar membranes hold great promise to realize ultrafast ion transfer if efficient and stable transfer channels are constructed in vertical ***,metal-organic framework(MOF)nanosheets bearing imidazole molecules in the pores were designed as building blocks to assemble free-standing MOF laminar ***,Nafion chains were threaded into the pores induced by electrostatic attraction from imidazole molecules by slowly filtering dilute Nafion *** demonstrate that the threaded Nafion chains lock adjacent MOF nanosheets,affording highly enhanced structural stability to the resultant laminar membrane with almost no water ***,abundant acid-base pairs are formed in the pores along Nafion chains,working as efficient,continuous conduction pathways in vertical *** conductivities as high as 110 and 46 mS·cm^(-1)are obtained by this membrane under 100%and 40%relative humidity(RH),respectively,which are two orders of magnitude higher than that of pristine MOF *** conductivity under low humidity(40%RH)is even over 2 times higher than that of commercial Nafion membrane,generating the maximum power density of 1,100 mW·cm^(-2)in hydrogen fuel cell(vs.291 mW·cm^(-2)of Nafion membrane).Besides,the influence of water state on proton transfer in confined space is investigated in detail.

关键词： MOF nanosheet Nafion-threaded MOF laminar membrane structural stability proton conductivity hydrogen fuel cell

Integration of cryogenic trap to gas chromatography-sulfur chemiluminescent detection for online analysis of hydrogen gas for volatile sulfur compounds

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Chinese Chemical Letters 2021年第11期32卷 3440-3445页

作者： Yi Pan Fan-Feng Deng Zheng Fang Han-Jiao Chen Zhou Long Xian-Deng Hou Analytical Testing Center Sichuan UniversityChengdu 610064China Institute of Chemistry National Institute of Measurement and Testing TechnologyChengdu 610021China

hydrogen fuel cells are among the promising energy sources worldwide,which could accomplish cyclic production of energy and avoid the emission of green-house or contaminative ***,sulfur compounds(SCs)even at trace level(nmol/mol)are usually involved in cell construction and further H_(2)production,which would cause degradation of the catalysts and shorten the lifetime of the fuel ***,the highly reactive SCs could cause varied species and concentrations of them in complex matrices,so online rather than offline analysis of SCs in H_(2)would be *** this context,we developed a new system combining online cryogenic preconcentration of nine SCs and subsequent determination by GC-SCD(sulfur chemiluminescent detector),with the correlation coefficients of the calibration curves higher than 0.999,calculated limits of detection no higher than 0.050 nmol/mol,analytical time around 30 min per sample,and satisfactory precision and accuracy(RSD<5%and SD<15%).The analytical performance was much better than or at least comparable to the previously reported and the developed system was successfully applied for real sample analysis.

关键词： Gas-chromatography hydrogen fuel cell Online cryogenic trap Sulfur chemiluminescent detector Volatile sulfur compounds

Analysis of the Influence of Geometrical Parameters on the Performance of a Proton Exchange Membrane fuel cell

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Fluid Dynamics & Materials Processing 2024年第1期20卷 219-237页

作者： Guodong Zhang Huifang Tao Da Li Kewei Chen Guoxiang Li Shuzhan Bai Ke Sun School of Energy and Power Engineering Shandong UniversityJinan250061China Sinotruk Jinan Special Purpose Vehicle Co. Ltd.Jinan250117China

A suitable channel structure can lead to efficient gas distribution and significantly improve the power density of fuel *** this study,the influence of two channel design parameters is investigated,namely,the ratio of the channel width to the bipolar plate ridge width(i.e.,the channel ridge ratio)and the channel *** impact of these parameters is evaluated with respect to the flow pattern,the gas composition distribution,the temperature field and the fuel cell output *** results show that a decrease in the channel ridge ratio and an increase in the channel depth can effectively make the distributions of velocity,temperature and concentration more uniform in each channel and improve the output capability of the fuel *** increase in the channel ridge ratio and depth obviously reduces the flow resistance and improves the flow characteristics.

关键词： hydrogen fuel cell bipolar plate flow channel multiphysics coupling

Atomic-scale engineering of advanced catalytic and energy materials via atomic layer deposition for eco-friendly vehicles

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International Journal of Extreme Manufacturing 2023年第2期5卷 90-117页

作者： Xiao Liu Yu Su Rong Chen State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and Technology1037Luoyu RoadWuhanHubeiPeople’s Republic of China

Zero-emission eco-friendly vehicles with partly or fully electric powertrains have exhibited rapidly increased demand for reducing the emissions of air pollutants and improving the energy efficiency. Advanced catalytic and energy materials are essential as the significant portions in the key technologies of eco-friendly vehicles, such as the exhaust emission control system,power lithium ion battery and hydrogen fuel cell. Precise synthesis and surface modification of the functional materials and electrodes are required to satisfy the efficient surface and interface catalysis, as well as rapid electron/ion transport. Atomic layer deposition(ALD), an atomic and close-to-atomic scale manufacturing method, shows unique characteristics of precise thickness control, uniformity and conformality for film deposition, which has emerged as an important technique to design and engineer advanced catalytic and energy materials. This review has summarized recent process of ALD on the controllable preparation and modification of metal and oxide catalysts, as well as lithium ion battery and fuel cell electrodes. The enhanced catalytic and electrochemical performances are discussed with the unique nanostructures prepared by ALD. Recent works on ALD reactors for mass production are highlighted. The challenges involved in the research and development of ALD on the future practical applications are presented, including precursor and deposition process investigation, practical device performance evaluation, large-scale and efficient production, etc.

关键词： atomic layer deposition eco-friendly vehicle exhaust gas catalysis lithium ion battery hydrogen fuel cell

A Hybrid Aluminum/hydrogen/Air cellmCommon Cathode

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Journal of Energy and Power Engineering 2014年第11期8卷 1889-1894页

作者： Lei Wang Fude Liu Wentao Wang Dawei Zheng Huizhi Wang Michael Kow-Hi Leung Department of Mechanical Engineering The University of Hong Kong Hong Kong China School of Energy and Environment The City University of Hong Kong Hong Kong China SINANO (Suzhou Institute of Nano-Tech and Nano-Bionics) Chinese Academy of Sciences Suzhou 215123 China

Metal/Air batteries are considered to be promising electricity storage devices given their compactness, environmental benignity and affordability. As a commonly available metal, aluminum has received great attention since its first use as an anode in a battery. Its high specific energy （even better volumetric energy density than lithium） makes it ideal for many primary battery applications. However, the development of A1/Air cell with alkaline electrolyte has been lagged behind mainly due to the unfavorable parasitic hydrogen generation. Herein, we designed and constructed a novel A1/H_2/Air tandem fuel cell to turn the adverse parasitic reaction into a useful process. The system consists of two anodes, namely, aluminum and hydrogen, and one common air-breathing cathode. The aluminum acts as both the anode for the A1/Air sub-cell and the source to generate hydrogen for the hydrogen/air sub-cell. The aluminum/air sub-cell has an open circuit voltage of 1.45 V and the H_2/Air sub-cell of 0.95 V. We demonstrated that the maximum power output of aluminum as a fuel was largely enhanced by 31% after incorporating the H_2/Air sub-cell with the tandem concept. In addition, a passive design was utilized in our tandem system to eliminate the dependence on auxiliary pumping sub-systems so that the whole system remained neat and eliminated the dependence of energy consuming pumps or heaters which were typically applied in micro fuel cells.

关键词： Al/Air battery hydrogen fuel cell passive fuel cell utilization efficiency tandem fuel cell.