Visualization of initial evolution of flooding in proton exchange membrane fuel cells with parallel flow channels

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-03-06 DOI:10.1016/j.ijhydene.2025.02.393

Juho Na , Gyutae Park , Junghyun Park , Seonghyeon Yang , Hyoun-Myoung Oh , Jiwon Baek , Dongjin Kim , Junseo Youn , Jooyoung Lim , Taehyun Park

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引用次数: 0

Abstract

To maintain optimal performance and extend the lifespan of proton exchange membrane fuel cells (PEMFCs), it is essential to monitor the generation and movement of liquid water and detect flooding at an early stage. This study utilizes transparent single cells with parallel channels and confirms that fog formation is confined to specific areas of the channel. Subsequently, the area of water droplets was quantified, revealing that 82% of all droplets were located within the fog area. The simulation results reveal that the region consistently encompasses areas with relative humidity (RH) of 1.8 or higher and a current density of 0.4 A/cm² or less. Simultaneously, flooding in the corresponding area is detected through high-frequency resistance (HFR) measurements, revealing that the HFR fluctuation cycle shortens, and the magnitude of HFR variation decreases as relative humidity (RH) increases or voltage decreases.

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平行流道质子交换膜燃料电池中泛洪初始演化的可视化

为了保持质子交换膜燃料电池（pemfc）的最佳性能并延长其使用寿命，必须监测液态水的产生和运动，并在早期阶段检测到水浸。这项研究利用具有平行通道的透明单细胞，并证实雾的形成仅限于通道的特定区域。随后，对水滴的面积进行了量化，发现82%的水滴位于雾区内。模拟结果表明，该区域始终包含相对湿度（RH）为1.8或更高，电流密度为0.4 a /cm2或更低的区域。同时，通过高频电阻（HFR）测量检测相应区域的泛洪，发现随着相对湿度（RH）的增加或电压的降低，高频电阻波动周期缩短，变化幅度减小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.