Performance of the PEMEC for hydrogen production and two-phase flow under gradient flow field conditions

IF 6.1 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2025-06-25 DOI:10.1016/j.applthermaleng.2025.127315

Hengkai Li , Cong Sun , Huangang Shi , Jifa Qu , Wenyi Tan

引用次数: 0

Abstract

The gradient flow field of a proton exchange membrane electrolysis cell (PEMEC) is favorable for improving electrical performance. The effects of the gradient flow field structure and operating parameters on the electrical performance of a PEMEC were revealed via optical visualization techniques according to bubble–water two-phase flow. The results show that the gradient type II flow field proposed in this paper has a smaller pressure drop, smaller bubble size and uniform distribution than the traditional parallel flow field and serpentine flow field do, which is conducive to the discharge of oxygen bubbles and is more suitable for PEMEC. An increase in the inlet flow rate favors the removal of bubbles in the flow channel. Moreover, additional water plays a cooling role in the PEMEC. The temperature effect overwhelms the turbulent effect of the flow field; therefore, the performance is slightly reduced under the overall influence.

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梯度流场条件下PEMEC制氢及两相流性能研究

质子交换膜电解槽（PEMEC）的梯度流场有利于提高电性能。以气泡-水两相流为研究对象，利用光学可视化技术揭示了梯度流场结构和操作参数对PEMEC电性能的影响。结果表明，与传统的平行流场和蛇形流场相比，本文提出的梯度II型流场具有更小的压降、更小的气泡尺寸和更均匀的分布，有利于氧气气泡的排出，更适合PEMEC。进口流量的增加有利于流道中气泡的去除。此外，额外的水在PEMEC中起冷却作用。温度效应压倒了流场的湍流效应；因此，在整体影响下，性能略有下降。

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

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.