CONSTRUCTION OF MULTIVARIATE DIGITAL TWIN SIMULATION SYSTEM FOR MEGAWATT-SCALE ALKALINE ELECTROLYZER

Liang Tao; Liu Zicong; Tan Jianxin; Jing Yanwei; Lyu Liangnian

doi:10.19912/j.0254-0096.tynxb.2023-1251

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (12) : 545-554. DOI: 10.19912/j.0254-0096.tynxb.2023-1251

CONSTRUCTION OF MULTIVARIATE DIGITAL TWIN SIMULATION SYSTEM FOR MEGAWATT-SCALE ALKALINE ELECTROLYZER

Liang Tao¹, Liu Zicong¹, Tan Jianxin², Jing Yanwei², Lyu Liangnian³

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Abstract

Alkaline electrolytic water hydrogen production system with strong coupling and complex operating conditions is a hazardous chemical production environment, so it is difficult to carry out extreme experiments such as wide power fluctuation test for renewable energy hydrogen production. In this paper, the 1 MW alkaline electrolyzer of Zhangjiakou Chongli hydrogen production plant is used as the research object, and the effects of variables such as temperature, pressure and alkali flow rate on parameters such as gas purity and cell voltage are analyzed by production experimental data. Firstly, the operating mechanism is analyzed, the data are fitted with multivariate nonlinearities to produce empirical equations, and the voltage model, Faraday efficiency model, and hydrogen concentration in oxygen model of the MW alkaline electrolyzer were established, and the post-treatment systems such as gas-liquid separation are modeled. Next, the model results are analyzed and verified theoretically, and the safe operation boundary of the hydrogen production system is derived from the model analysis. Finally, the mathematical model of the hydrogen production system is combined with the 3D model to realize the mapping of the hydrogen production system in the virtual space, which provides an a priori platform to study the wide power fluctuation of renewable energy hydrogen production.

Key words

alkaline electrolyzer / digital twins / hydrogen production / wide power fluctuation / multivariate / security boundaries

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Liang Tao, Liu Zicong, Tan Jianxin, Jing Yanwei, Lyu Liangnian. CONSTRUCTION OF MULTIVARIATE DIGITAL TWIN SIMULATION SYSTEM FOR MEGAWATT-SCALE ALKALINE ELECTROLYZER[J]. Acta Energiae Solaris Sinica. 2024, 45(12): 545-554 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1251

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