Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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仿生流場(chǎng)質(zhì)子交換膜燃料電池特性研究

來源:電工電氣發(fā)布時(shí)間:2024-06-03 14:03 瀏覽次數(shù):104

仿生流場(chǎng)質(zhì)子交換膜燃料電池特性研究

王旭,楊俠,吳艷陽,張剛,羅燕
(武漢工程大學(xué) 機(jī)電工程學(xué)院,湖北 武漢 430205)
 
    摘 要:為了研究不同流場(chǎng)結(jié)構(gòu)對(duì)質(zhì)子交換膜燃料電池 (PEMFC) 性能的影響,基于人類肺部毛細(xì)結(jié)構(gòu)改進(jìn)設(shè)計(jì)了一種新型仿生流場(chǎng)。利用計(jì)算流體力學(xué)軟件 Fluent 分別對(duì)仿生流場(chǎng)、平行流場(chǎng)、單蛇形流場(chǎng)的 PEMFC 進(jìn)行數(shù)值模擬,對(duì)比了三種 PEMFC 的極化曲線、壓降、氣體濃度分布以及電流密度分布,并探究了陰陽極相對(duì)加濕度對(duì)新型仿生流場(chǎng) PEMFC 性能的影響。結(jié)果表明:仿生流場(chǎng)內(nèi)氫氣、氧氣、水分布最均勻,陰極流道壓降值最小,陰極催化層上電流密度最大;高電壓下,電流密度隨著陰陽極濕度增大而增大,電池性能隨之提升,并且陽極氣體加濕度對(duì)電池性能的影響比陰極氣體加濕度對(duì)電池性能的影響大;低電壓下,電流密度隨著陰陽極濕度增大而減小,電池性能隨之降低,并且陰極氣體加濕度對(duì)電池性能的影響比陽極氣體加濕度對(duì)電池性能的影響大。
    關(guān)鍵詞: 質(zhì)子交換膜燃料電池;數(shù)值模擬;陰陽極相對(duì)加濕度;流場(chǎng)結(jié)構(gòu)
    中圖分類號(hào):TM911.4     文獻(xiàn)標(biāo)識(shí)碼:A     文章編號(hào):1007-3175(2024)05-0034-07
 
Research on Characterization of Proton Exchange Membrane
Fuel Cell with Bionic Flow Field
 
WANG Xu, YANG Xia, WU Yan-yang, ZHANG Gang, LUO Yan
(School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China)
 
    Abstract: In order to investigate the effect of different flow field structures on the performance of proton exchange membrane fuel cell(PEMFC), a novel bionic flow field based on the improved capillary structure of human lungs was designed. In this paper, computational fluid dynamics software Fluent was used to carry out numerical simulation for the PEMFC in bionic flow field, parallel flow field, and single snake flow field respectively. The polarization curves, the pressure drop, the distribution of gas concentration and the distribution of the current density of three PEMFCs were compared, and the effects of relative humidity of cathode and anode on the performance of novel bionic flow field PEMFC were explored. The results showed that the distribution of hydrogen, oxygen and water in the bionic flow field is most uniform,the pressure drop value of the cathode channel is smallest, and the current density on the cathode catalytic layer is largest. At high voltage,with the increasing of cathode and anode humidity, the current density increases, resulting in improved cell performance, and the effect of anode gas humidity on cell performance is greater than that of cathode gas humidity. At low voltage, with the increasing of cathode and anode humidity, the current density decreases, resulting in decreased cell performance, and the effect of cathode gas humidity on cell performance is greater than that of anode gas humidity.
    Key words: proton exchange membrane fuel cell; numerical simulation; relative humidity of cathode and anode; flow field structure
 
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