Enhancement of hydrogen charging in metal hydride-based storage systems using heat pipe


Elhamshri F. A. M. , KAYFECİ M.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.44, ss.18927-18938, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 44 Konu: 34
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.ijhydene.2018.10.040
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Sayfa Sayıları: ss.18927-18938

Özet

Heat transfer in metal hydride bed significantly affects the performance of metal hydride reactors (MHRs). Enhancing heat transfer within the reaction bed improves the hydriding rate. This study presents performance analysis in terms of storage capacity and time of three different cylindrical MHR configurations using storage media LaNi5: a) reactor cooled with natural convection, b) reactor with a heat pipe on the central axis, c) reactor with finned heat pipe. This study shows the impact of using heat pipes and fins for enhancing heat transfer in MHRs at varying hydrogen supply pressures (2-15 bar). At any absorption temperature, hydrogen absorption rate and hydrogen storage capacity increase with the supply pressure. Results show that using a heat pipe improves hydrogen absorption rate. It was found that finned heat pipe has a significant effect on the hydrogen charge time, which reduced by approximately 75% at 10 bar hydrogen supply pressure. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.