Parametric Analysis of a Novel Array-Type Hydrogen Storage Reactor with External Water-Cooled Jacket Heat Exchange

Yang Ye (), Ziyang Zhang, Yuanyuan Zhang (), Jingjing Liu, Kai Yan and Honghui Cheng
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Yang Ye: School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
Ziyang Zhang: School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
Yuanyuan Zhang: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Jingjing Liu: School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
Kai Yan: School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
Honghui Cheng: School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

Energies, 2024, vol. 17, issue 21, 1-12

Abstract: Hydrogen energy is a green and environmentally friendly energy source, as well as an excellent energy carrier. Hydrogen storage technology is a key factor in its commercial development. Solid hydrogen storage methods represented by using metal hydride (MH) materials have good application prospects, but there are still problems of higher heat transfer resistance and slower hydrogen absorption and release rate as the material is applied to reactors. This study innovatively proposed an array-type MH hydrogen storage reactor based on external water-cooled jacket heat exchange, aiming to improve the heat transfer efficiency and absorption reaction performance, and optimize the absorption kinetics encountered in practical applications of LaNi 5 hydrogen storage material in reactors. A mathematical model was built to compare the hydrogen absorption processes of the novel array-type and traditional reactors. The results showed that, with the same water-cooled jacket, the hydrogen absorption rate of the array-type reactor can be accelerated by 2.78 times compared to the traditional reactor. Because of the existence of heat transfer enhancement limits, the increase in the number of array elements and the flow rate of heat transfer fluid (HTF) has a limited impact on the absorption rate improvement of the array-type reactor. To break the limits, the hydrogen absorption pressure, as a direct driving force, can be increased. In addition, the increased pressure also increases the heat transfer temperature difference, thereby further improving heat transfer and absorption rate. For instance, at 3 MPa, the hydrogen absorption time can be shortened to 147 s.

Keywords: LaNi 5; solid hydrogen storage; absorption reaction; heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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