碱性水电解
灵敏度(控制系统)
环境科学
电解
工艺工程
废物管理
环境工程
工程类
化学
电解质
电极
物理化学
电子工程
作者
Georgios Sakas,Alejandro Ibáñez-Rioja,Santeri Pöyhönen,Lauri Järvinen,Antti Kosonen,Vesa Ruuskanen,Pertti Kauranen,Jero Ahola
出处
期刊:Applied Energy
[Elsevier]
日期:2024-04-01
卷期号:359: 122732-122732
被引量:1
标识
DOI:10.1016/j.apenergy.2024.122732
摘要
Bipolar configuration electrochemical stacks with a common or circulating electrolyte supply usually embody a high amount of shunt currents that escape from the main current path to the manifold nozzles. This paper suggests a novel and simplified semiempirical model to reasonably predict the total shunt currents in industrial alkaline water electrolyzers (AWE). The aim of the study is to perform a sensitivity analysis of the model parameters and the process conditions that affect the shunt currents and the plant’s specific energy consumption (SEC), and to determine the most important ones by analyzing the thermodynamic and fluidic properties of the stack. An in-house MATLAB dynamic energy and mass balance model of an industrial 3MW, 16bar AWE plant process was developed. The semiempirical dynamic process model is updated with the essential shunt currents and electrochemical, fluidic, and circulation impurity models. The study revealed the influence of the supplied current, the electrolyte temperature, the process pressure, the electrolyte flow rate, and the potassium hydroxide concentration on the shunt currents and the plant’s SEC.
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