Eulerian Two-Fluid Model of Alkaline Water Electrolysis for Hydrogen Production
Eulerian Two-Fluid Model of Alkaline Water Electrolysis for Hydrogen Production
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DOI：
10.3390/en13133394
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发表时间：
2020-07-01
期刊：
影响因子：
3.2
通讯作者：
Inguanta, Rosalinda
中科院分区：
文献类型：
--
作者：
Le Bideau, Damien;Mandin, Philippe;Inguanta, Rosalinda
储氢是一种很有前途的可再生能源储存技术。尽管其具有高能量密度潜力，但储氢的发展一直受到阻碍，主要是由于其巨大的成本。虽然其成本主要由电能费用决定，特别是对于用碱性水电解产生的氢，但它也由电池张力的值驱动。电解槽改进的最常见手段是使用电催化剂，其减少发生电化学反应所需的能量。电解槽改进的另一种有效手段是使用计算流体动力学（CFD）辅助设计，其允许理解电解槽中发生的现象并且还允许电解槽效率的改进。设计的两相流体动力学模型的这项研究进行了比较，用激光多普勒测速（LDV）方法测量的速度剖面的实验结果。模拟结果与文献中的实验数据吻合较好。在与实验值吻合较好的情况下，引入一种新的气泡传递物理现象--气泡扩散，是有效的。
Hydrogen storage is a promising technology for storage of renewable energy resources. Despite its high energy density potential, the development of hydrogen storage has been impeded, mainly due to its significant cost. Although its cost is governed mainly by electrical energy expense, especially for hydrogen produced with alkaline water electrolysis, it is also driven by the value of the cell tension. The most common means of electrolyzer improvement is the use of an electrocatalyst, which reduces the energy required for electrochemical reaction to take place. Another efficient means of electrolyzer improvement is to use the Computational Fluid Dynamics (CFD)-assisted design that allows the comprehension of the phenomena occurring in the electrolyzer and also the improvement in the electrolyzer's efficiency. The designed two-phase hydrodynamics model of this study has been compared with the experimental results of velocity profiles measured using Laser Doppler Velocimetry (LDV) method. The simulated results were in good agreement with the experimental data in the literature. Under the good fit with experimental values, it is efficient to introduce a new physical bubble transfer phenomenon description called "bubble diffusion".