Optimization of hydrogen storage in metal-hydride tanks

被引：194

作者：

Askri, F. ^{[1
]}

Salah, M. Ben ^{[1
]}

Jemni, A. ^{[1
]}

Ben Nasrallah, S. ^{[1
]}

机构：

[1] Ecole Natl Ingn Monastir, Lab Etudes Syst Therm & Energet, Monastir 5019, Tunisia

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 02期

关键词：

Metal hydrides; Hydrogen storage; Numerical simulation; Heat transfer; Fins; MASS-TRANSFER; HEAT-TRANSFER; ABSORPTION; SIMULATION; EXCHANGER;

D O I：

10.1016/j.ijhydene.2008.11.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The storage time of hydrogen in metal-hydride tanks (MHTs for short) is strongly influenced by the rate at which heat can be removed from the reaction bed. In the present work a two-dimensional mathematical model is developed and validated against experimental results. This model is used, first, to evaluate the impact of the tank wall thermal mass on the hydriding process. Walls in steel and in brass are tested and the obtained results show that there is no significant effect on hydrogen storage time. Then, the established model is used to study the dynamic behaviour inside various designs of MHTs: i) a cylindrical tank, ii) a cylindrical tank with external fins, iii) a cylindrical tank with a concentric tube filled with flowing cooling fluid and iv) a cylindrical tank with a concentric tube equipped with fins. Optimization results indicate that almost 80% improvement of the storage time can be achieved over the case where the tank is not optimized. Published by Elsevier Ltd on behalf of International Association for Hydrogen Energy.

引用

页码：897 / 905

页数：9

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