A CFD‐based manifold design methodology for large‐scale PEM fuel cell stacks

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2024-09-02 DOI:10.1002/aic.18601

Weitong Pan, Longfei Tang, Yunfei Gao, Lu Ding, Zhenghua Dai, Xueli Chen, Fuchen Wang

引用次数: 0

Abstract

The flow distribution issue is of significance to the fuel cell stack performance and durability, which herein is studied from a theoretical and practical level. The manifold flow fundamentals are clarified and the pressure‐reconstruction‐based principle to regulate flow distribution is revealed. The prerequisite and corequisite lie in the ratio of pressure drop between headers and the entire manifold, and the pressure recovery in the inlet header. Accordingly, a step‐by‐step manifold design methodology is proposed and further quantified by detailed and organized simulations. A desirable effect on flow uniformity is validated in large‐scale stacks consisting of 300 and 400 cells, and the values of flow uniformity index represented by coefficient of variation (CV) are 3.32% and 2.95%, respectively. Moreover, a novel wedge‐shaped layout of the intake header is proposed for further optimization. The corresponding CV values have notably declined to 1.36% and 1.29%, nearly 60% lower than the conventional rectangular counterparts.

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基于 CFD 的大规模 PEM 燃料电池堆歧管设计方法

流量分布问题对燃料电池堆的性能和耐用性具有重要意义，本文从理论和实践层面对此进行了研究。本文阐明了歧管流量的基本原理，并揭示了基于压力重建的流量分布调节原理。前提和核心在于集流管与整个集流管之间的压降比以及入口集流管的压力恢复。因此，提出了一种分步歧管设计方法，并通过详细和有组织的模拟进行了进一步量化。在由 300 个单元和 400 个单元组成的大型烟囱中验证了对流量均匀性的理想效果，以变异系数（CV）表示的流量均匀性指数值分别为 3.32% 和 2.95%。此外，还提出了一种新颖的楔形进气集管布局，以便进一步优化。相应的 CV 值显著下降到 1.36% 和 1.29%，比传统的矩形布局低近 60%。

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

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.