Gas crossover is an important feature affecting the overall performance of membrane-free water electrolyser, as it may lead to compromised product quality and safety risks. In this paper, the concept of using flow control device for reduction of gas crossover in a membrane-free water electrolysers is introduced. A numerical study is conducted to investigate the influence of flow controller on the H bubble curtain thickness in a vertical flow-by membrane-free electrolyser under various operating conditions, and the effect of flow controller geometry on the H bubbles is systematically studied. An experimental rig is developed to validate the numerical model and to test the performance of a flow controller prototype. The results show that the proposed flow controller can effectively alleviate the crossover of gases in the electrolyser cell without compromising the cell efficiency.

中文翻译：

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无膜电解槽中气泡管理的流量控制

气体交叉是影响无膜水电解槽整体性能的重要特征，因为它可能导致产品质量下降和安全风险。本文介绍了在无膜水电解槽中使用流量控制装置来减少气体透过的概念。通过数值研究，研究了不同操作条件下流量控制器对立式流经无膜电解槽中H气泡幕厚度的影响，并系统研究了流量控制器几何形状对H气泡的影响。开发了一个实验装置来验证数值模型并测试流量控制器原型的性能。结果表明，所提出的流量控制器可以有效减轻电解槽中的气体交叉，而不影响电池效率。