Dimensionless approach of a polymer electrolyte membrane water electrolysis: Advanced analytical modelling

JOURNAL OF POWER SOURCES

卷:481

Article

Aubras, Farid^1,2,3  Rhandi, Maha^1,2  Deseure, Jonathan^1,2  Kadjo, Amangoua Jean-Jacques³  Bessafi, Miloud³  Majasan, Jude⁴  Grondin-Perez, Brigitte³  Druart, Florence^1,2  Chabriat, Jean-Pierre³ 

[1] Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, Grenoble INP,LEPMI, F-38000 Grenoble, France

[2] Univ Grenoble Alpes, Inst Engn & Management, Grenoble, France

[3] Univ La Reunion, LE2P, St Denis, France

[4] UCL, Dept Chem Engn, Electrochem Innovat Lab, London, England

关键词: Closed-form solution;    Dimensionless model;    PEM water electrolysis;    Two-phase flow characterisation;   

DOI  :  10.1016/j.jpowsour.2020.228858

来源: Elsevier

【 摘 要 】

The water electrolysis appears as a sustainable solution for hydrogen production. The proton exchange membrane electrolyzers (PEM-E) play an increasingly important role in the development of hydrogen technology. Fast analysis of PEM-E efficiency using a mathematical approach is an effective tool for the improvement of these devices. This work presents a closed-form solution of single cell PEM-E modelling. The approach considers charge and mass transport balances. The one-dimensional study focuses on the anodic and the cathodic catalyst layer and the membrane using only dimensionless parameters. The analytical model allows to describe the water management as a function of pressure gradient and current density using a dimensionless ratio of water transport process (beta(m,)). This model is endorsed by experimental data. Dimensionless parameters like Thiele modulus (beta(a,c)) or Wagner number (omega(a, C)) are reached using numerical optimization methods. Changing values of dimensionless numbers, allow the observation of the impact of the two-phase flow regimes on the electrochemical performances.

【 授权许可】

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