Structural design and mass-transfer performances of a proton exchange membrane fuel cell with a traveling-wave flow-field

doi:10.3969/j.issn.1674-8484.2024.03.008

Abstract

Abstract:

A traveling-wave flow-field plate with an arc concave surface was designed as an enhanced mass transfer structure to improve the mass transfer performances of the membrane electrode assembly (MEA) and to improve the power density of proton exchange membrane fuel cells (PEMFC). By combining milling technology, the manufacturing of traveling wave flow field structures has been achieved. Using computational fluid dynamics software, a three-dimensional model of the PEMFC was established, including the traveling wave flow field and MEA. The accuracy of the model was experimentally verified. Explored the distribution pattern of enhanced mass transfer structure on the internal velocity field, concentration field, and electric field of PEMFC, and analyzed the improvement effect of PEMFC performance. The results showed that compared with the conventional flow field with a channel 0.6 mm depth and 0.8 mm width, the average flow velocity of the traveling wave flow field in this article increased by 27.7%, the pressure loss decreased by 19.2%, the oxygen content at the interface between the flow field plate and MEA increased by 1.44%, the drainage rate at the outlet increased by 16.7%, and the power density increased by 8.6%.

Key words: proton exchange membrane fuel cell (PEMFC), traveling-wave flow-field, mass transfer performances, power density

CLC Number:

U469.7

ZHU Xinning, WANG Xi, LIU Rongkang, ZHU Siming, ZHANG Jianbo, ZHOU Wei. Structural design and mass-transfer performances of a proton exchange membrane fuel cell with a traveling-wave flow-field[J]. Journal of Automotive Safety and Energy, 2024, 15(3): 351-359.

Figures/Tables 14

References 30

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迎风面长度/ mm	3.75
迎风凹面半径/ mm	14.38
背风面长度/ mm	1.25
背风凹面半径/ mm	4.95
随行波总长度/ mm	5.00
波峰高度/ mm	0.50

迎风面长度/ mm	3.75
迎风凹面半径/ mm	14.38
背风面长度/ mm	1.25
背风凹面半径/ mm	4.95
随行波总长度/ mm	5.00
波峰高度/ mm	0.50

名称	型号	精度
流量控制器	D07-19C	准确度(FS) =±1%
温度控制器	Al-508	精度(FS) =±0.2%
直流稳压器	MP15100D	稳定度≤0.2%
背压阀	HBP-1	分辨率 1 kPa

名称	型号	精度
流量控制器	D07-19C	准确度(FS) =±1%
温度控制器	Al-508	精度(FS) =±0.2%
直流稳压器	MP15100D	稳定度≤0.2%
背压阀	HBP-1	分辨率 1 kPa

参数	随行波流场	常规流场
流道深/ mm	1.0	0.6
流道宽/ mm	1.0	0.8
流道长/ mm	48.0	48.0
肋宽/ mm	1.0	0.9
流场长/ mm	50.0	50.0
流场宽/ mm	50.0	50.0
活化面积/ mm²	2 500	2 500
气体扩散层厚/ mm	0.2	0.2
催化层厚/ μm	1.0	1.0
PEM 厚/ μm	3.0	3.0
模型1 / 万	160	487.5
模型2 / 万	400	975.0