Numerical Simulation of Gas–Liquid Flow Field in PEM Water Electrolyzer

Yusheng Zhang, Xiaoying Yuan, Sheng Yao, Hairui Yang and Cuiping Wang ()
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Yusheng Zhang: Shandong Key Laboratory of Integrated Multi-Energy Systems for High Efficiency and Intelligent Operation, Shandong University of Science and Technology, Qingdao 266590, China
Xiaoying Yuan: Shandong Key Laboratory of Integrated Multi-Energy Systems for High Efficiency and Intelligent Operation, Shandong University of Science and Technology, Qingdao 266590, China
Sheng Yao: Shandong Key Laboratory of Integrated Multi-Energy Systems for High Efficiency and Intelligent Operation, Shandong University of Science and Technology, Qingdao 266590, China
Hairui Yang: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Cuiping Wang: Shandong Key Laboratory of Integrated Multi-Energy Systems for High Efficiency and Intelligent Operation, Shandong University of Science and Technology, Qingdao 266590, China

Energies, 2025, vol. 18, issue 11, 1-17

Abstract: Hydrogen is an excellent clean energy, and hydrogen production by electrolyzing water has become the preferred method. Due to its high electrolysis efficiency and great potential for energy conversion and storage, water electrolysis in a proton exchange membrane (PEM) electrolyzer has attracted considerable attention. In order to explore the factors affecting the internal resistance of PEM water electrolyzers and optimize them, a three-dimensional steady-state model of PEM water electrolyzers coupled with a porous media physical field was established. First, the flow fields in multi-channel and single-channel electrolyzers were designed and comparably simulated. It was found that both flow field configuration and flow modes affected the mass transfer and current distribution. The multi-channel parallel flow field had the lowest flow pressure drop and uniform flow field, which is beneficial to efficient catalytic electrolysis. Secondly, the simulation results of mass transfer in the PEM cell were highly consistent with the reference experimental data, and the increased reference exchange current density (i 0 ) can improve the oxygen/hydrogen production performance of the cell. These findings are helpful in optimizing the design of the PEM water electrolyzer.

Keywords: PEM water electrolysis; dynamic modeling; mass transfer; parallel flow channel; flow field (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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