On the selection of metal foam volume fraction for hydriding time minimization of metal hydride reactors

Meng Lung Tsai, Tian Shiang Yang

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Here we examine how the hydriding time of a metal hydride reactor (MHR) varies with the volume fraction, φmf, of a metal foam installed in the reactor. Technically, an experimentally validated mathematical model accounting for the hydrogen absorption kinetics of LaNi5 is used to compute the heat and mass transport in a cylindrical MHR. We then demonstrate that, with a fixed amount of metal hydride powder sealed in the reactor, saving a relatively small fraction (say, 1%) of the MHR internal volume to accommodate a metal foam usually suffices to substantially facilitate heat removal from the reactor, thereby greatly shortening the MHR hydriding time. However, for a metal foam of fixed apparent size, increasing φmf would reduce the metal hydride content, and hence the maximum hydrogen storage capacity, of the MHR. Consequently, if a prescribed amount of hydrogen is to be stored in the MHR, the hydriding time would decrease with increasing φmf at first (due to heat conduction augmentation), reach a minimum at an "optimal" φmf value, and then increase drastically due to metal hydride underpacking.

原文English
頁(從 - 到)11052-11063
頁數12
期刊International Journal of Hydrogen Energy
35
發行號20
DOIs
出版狀態Published - 2010 10月

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 燃料技術
  • 凝聚態物理學
  • 能源工程與電力技術

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