Influence of external operating parameters on the hydrothermal transport and performance in proton exchange membrane water electrolyzer

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2024-07-22 DOI:10.1007/s11581-024-05688-x

Zhoujian An, Minchao Yao, Xiaoze Du, Qingliang Li, Binghao Jian, Dong Zhang

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Abstract

The single-channel-serpentine proton exchange membrane water electrolyzer (PEMWE) has the potential to be a crucial element in the linking of power, transport, heating, and chemical industries in the foreseeable future of sustainable energy systems. Its performance is influenced by a number of factors. Within the many factors affecting their performance, the external operating parameters have a significant effect on the temperature distribution of the internal components as well as the moisture distribution. In this paper, a single-channel-serpentine flow field electrolyzer (SFFE) is built to address the simulation deficiencies of a conventional single-channel proton exchange membrane electrolyzer, and to more intuitively represent the effects of single-channel-serpentine external environmental parameters on the internal performance of the electrolyzer, in order to assess the effects of different voltages, operating temperatures, and inlet flow rates on the distribution of heat, the distribution of liquid water and gases, and the susceptibility to cross-penetration sites. The results show that when the operating voltage drops below 2.2 V, the liquid-saturated water undergoes a greater impact. Specifically, the voltage increase from 1.6 to 2.2 V results in a significant decrease from 0.97 to 0.79, corresponding to an 18.6% drop. That is, when the voltage is 2.2 V, the liquid water content ensures the adequacy of the reaction, while the inhibitory effect of bubble formation occurs at the beginning. Therefore, 338.15 K and 2.2 V are the most recommended experimental conditions.

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外部运行参数对质子交换膜水电解槽水热传输和性能的影响

在可预见的未来可持续能源系统中，单通道蛇形质子交换膜水电解槽（PEMWE）有可能成为连接电力、运输、供热和化工行业的关键要素。其性能受到多种因素的影响。在影响其性能的众多因素中，外部运行参数对内部组件的温度分布和湿度分布有重大影响。本文针对传统单通道质子交换膜电解槽模拟的不足，建立了单通道蛇形流场电解槽（SFFE），更直观地表现单通道蛇形流场外部环境参数对电解槽内部性能的影响，以评估不同电压、工作温度和入口流速对热量分布、液态水和气体分布以及易交叉渗透点的影响。结果表明，当工作电压降至 2.2 V 以下时，液态饱和水受到的影响更大。具体来说，电压从 1.6 V 上升到 2.2 V 时，水的浓度从 0.97 显著下降到 0.79，相当于下降了 18.6%。也就是说，当电压为 2.2 V 时，液态水含量确保了反应的充分性，而气泡形成的抑制作用则出现在开始阶段。因此，338.15 K 和 2.2 V 是最值得推荐的实验条件。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.