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Numerical study on a two-stage metal hydride hydrogen compression system

Gkanas, Evangelos I.; Grant, David M.; Stuart, Alastair D.; Eastwick, Carol; Book, D.; Nayebossadri, S.; Pickering, L.; Walker, Gavin S.

Authors

Evangelos I. Gkanas

David M. Grant

Alastair D. Stuart

CAROL EASTWICK CAROL.EASTWICK@NOTTINGHAM.AC.UK
Professor of Mechanical Engineering

D. Book

S. Nayebossadri

L. Pickering

Gavin S. Walker



Abstract

A multistage Metal Hydride Hydrogen Compression (MHHC) system uses a combination of hydride materials in order to increase the total compression ratio, whilst maximizing the hydrogenation rate from the supply pressure at each stage. By solving the coupled heat, mass and momentum conservation equations simultaneously the performance of a MHHC system can be predicted. In the current work a numerical model is proposed to describe the operation of a complete compression cycle. Four different MHHC systems are examined in terms of maximum compression ratio, cycle time and energy consumption and it was found that the maximum compression ratio achieved was 22:1 when operating LaNi5 (AB5-type) and a Zr–V–Mn–Nb (AB2-type intermetallic) as the first and second stage alloys respectively in the temperature range of 20°C (hydrogenation) to 130°C (dehydrogenation).

Journal Article Type Article
Journal Journal of Alloys and Compounds
Print ISSN 0925-8388
Electronic ISSN 1873-4669
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 645
Issue Supp1
Article Number S18-S22
APA6 Citation Gkanas, E. I., Grant, D. M., Stuart, A. D., Eastwick, C., Book, D., Nayebossadri, S., …Walker, G. S. (in press). Numerical study on a two-stage metal hydride hydrogen compression system. Journal of Alloys and Compounds, 645(Supp1), https://doi.org/10.1016/j.jallcom.2015.03.123
DOI https://doi.org/10.1016/j.jallcom.2015.03.123
Keywords Metal Hydride Hydrogen Compression; Metal hydride; Simulation; Coupled heat and mass transfer. Hydrogenation/dehydrogenation
Publisher URL http://www.sciencedirect.com/science/article/pii/S0925838815008361
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Num 2 stage comp accepted manuscript.pdf (614 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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