Engineering control strategy of hydrogen gas direct-heating type Mg-based solid state hydrogen storage tanks: A simulation investigation

Longfei Shao, Xi Lin, Liansen Bian, Yanyue Wang, Shouyi Hu, Yaobin Han, Ke Huang, Ning Zhang, Jiaqi Zhang and Jianxin Zou

Applied Energy, 2024, vol. 375, issue C, No S0306261924015174

Abstract: Hydrogen has emerged as a promising and eco-friendly energy carrier pivotal for fostering sustainable development in human society. Nonetheless, its lightweight and gaseous nature pose significant challenges in storage. Mg-based hydrogen storage materials offer a promising solution to address this issue owing to their high hydrogen storage density and safety features. However, in the practical implementation of a Mg-based hydrogen storage tank (HST), the efficient storage and supply of hydrogen remain the primary bottleneck. In this work, we designed a novel Mg-based HST using high-temperature hydrogen gas as the heat transfer medium, and proposed the operating parameters and control strategies through a simulation investigation. We delved into the effects of key parameters such as hydrogen gas inlet temperature, hydrogen gas inlet flow rate, and a specific height ratio (HR) related to the structure. It is found that the hydrogen absorption or desorption process of this Mg-based HST at different initial reaction fractions (RF0) can be controlled by the operation conditions of the hydrogen gas. The hydrogen gas inlet temperatures of 473 K and 773 K are optimal for hydrogen absorption and desorption, respectively. Faster hydrogen absorption/desorption rates can be realized at a high hydrogen gas inlet flow rate. Additionally, a specific height ratio (HR) of 9:1 is recommended to enhance hydrogen absorption/desorption performance. Furthermore, we proposed an innovative application strategy wherein the hydrogen gas direct-heating type Mg-based HST is coupled with a gas circulatory system. This integrated system, along with our engineering control strategy, offers a novel design paradigm for Mg-based solid state hydrogen storage and transportation systems.

Keywords: Hydrogen storage; Mg-based solid state hydrogen storage tank; Numerical simulation; Hydrogen gas direct-heating (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1016/j.apenergy.2024.124134

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