Numerical Investigation on the Operation and Energy Demand of a Seven-Stage Metal Hydride Hydrogen Compression System for Hydrogen Refuelling Stations

Evangelos Gkanas, Christodoulos Christodoulou, George Tzamalis, Emmanuel Stamatakis, Alexander Chroneos, Konstantinos Deligiannis, George Karagiorgis, A. K. Stubos

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)
    198 Downloads (Pure)


    In the present work, a numerical analysis on the performance of a seven-stage metal hydride hydrogen compression (MHHC) system is introduced, presented and discussed. The operation efficiency and cost along with the reliability of hydrogen compression is of great importance for the future commercial availability of Hydrogen Refuelling Stations (HRS); thus, significant improvements in hydrogen compression must be achieved and novel methods and approaches are being investigated in that respect. MHHC’s offer distinct advantages over conventional mechanical compressors and the present paper aims at contributing to the efficient design and upscaling of such devices via advanced numerical simulations of a seven-stage MHHC. The numerical model was supported by and validated with solid experimental data. Furthermore, several different operational temperature ranges for the compressor were examined and the importance of the proper operation conditions is discussed in terms of temperature evolution, pressure profile, cycle duration, compression ratio, thermal energy demand and efficiency.
    Original languageEnglish
    Pages (from-to)164-178
    Number of pages15
    JournalRenewable Energy
    Early online date22 Aug 2019
    Publication statusPublished - 1 Mar 2020

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Renewable Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Renewable Energy, 147, (2020) DOI: 10.1016/j.renene.2019.08.104

    © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International


    • Hydrogen storage
    • Metal hydride hydrogen compressor
    • Metal hydrides
    • Multi-stage compression
    • Numerical analysis

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment


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