Modeling of a Hydrogen Storage System Based on Metal Hydride and Phase Change Material

Walter H. Wiersma*, Canan Acar

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

This study analyzes the viability of a metal hydride-phase change material (MH-PCM) onboard storage system. Additionally, the effect of natural convection and thermal enhancements on the absorption time and gravimetric capacity are studied. To this study's knowledge, no studies have been performed on MH-PCM configurations while including natural convection. No significant attempts to include thermal enhancements were neither found in the literature. The results show that natural convection plays a significant role during the melting of PCM and absorption of hydrogen by the MH. The addition of natural convection causes a reduction of 68.9% in absorption time. Introducing thermal enhancements to the MH-PCM tank, the absorption is reduced by 92.4% while seeing a decrease of the gravimetric capacity of 30.42% compared to the case not including thermal enhancements. Performance indicators are gathered by having a defined car and the currently defined storage subjected to different driving cycles. From comparing these performance indicators with the targets set by the Department of Energy, it is concluded that an MH-PCM onboard storage system is not viable. The cause is contributed to the PCM mass required to store the released heat during absorption.

Original languageEnglish
Title of host publicationProceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference
Subtitle of host publicationBridging Continents by H2
EditorsIbrahim Dincer, Can Ozgur Colpan, Mehmet Akif Ezan
PublisherInternational Association for Hydrogen Energy, IAHE
Pages604-606
Number of pages3
ISBN (Electronic)9786250008430
Publication statusPublished - 2022
Event23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022 - Istanbul Congress Center, Istanbul, Turkey
Duration: 26 Jun 202230 Jun 2022
Conference number: 23

Conference

Conference23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022
Abbreviated titleWHEC
Country/TerritoryTurkey
CityIstanbul
Period26/06/2230/06/22

Keywords

  • Heat transfer
  • Hydrogen storage
  • Metal hydride
  • Phase change material
  • Thermal management

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