Cyclic behaviors of a novel design of a metal hydride reactor encircled by cascaded phase change materials

Talal Alqahtani, Ahmad Bamasag, Sofiene Mellouli, Faouzi Askri, Patrick E. Phelan

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


The integration of a phase change material (PCM) with a metal hydride (MH) reactor has received considerable attention recently. In such a system, the exothermic and endothermic processes of the MH reactor can be utilized effectively by enhancing the thermal exchange between the MH reactor and the PCM bed. In this study, a novel design that integrates the MH reactor with cascaded PCM beds is proposed. Magnesium nickel (Mg2Ni) alloy is used as the hydride reactor. Two different types of PCMs with different melting temperatures and enthalpies are arranged in series. A parametric study is carried out to identify the optimum distribution of the different PCMs. The results indicate that the proposed cascaded MH-PCM sandwich design improves the heat transfer rate which consequently shortens the time duration of the hydrogenation and dehydrogenation processes by 26% and 51%, respectively, compared to an MH-PCM sandwich design that includes only a single PCM.

Original languageEnglish (US)
Pages (from-to)32285-32297
Number of pages13
JournalInternational Journal of Hydrogen Energy
Issue number56
StatePublished - Nov 13 2020


  • Cascaded phase change materials
  • Hydrogen storage
  • Metal hydride
  • Phase change material

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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