Conception and experimental investigation of metal hydride hydrogen storage system

Abstract

.Metal hydrides offer the potential to store hydrogen at modest pressures and temperatures with
high volumetric efficiencies. The process of charging hydrogen into a metal powder to form the hydride
is exothermic. The heat released by the reaction must be removed quickly in order to maintain a rapid
charging rate. An effective method for heat removal is to embed a heat exchanger within the metal
hydride bed. If the heat released is not removed from the system, the resulting temperature rise of the
hydride will reduce the hydrogen absorption rate. Hence, hydrogen storage systems based on hydride
materials must include a way to remove the heat generated during the absorption process. The present
work aim to size, design and fabricate a metal-hydrogen reactor to study the hydrogen storage in a closed
metal-hydrogen reactor. The effects of water cooling temperature (T F ), hydrogen injection pressure (P H2 )
and cooling fluid flow rate () on the mass absorbed of hydrogen (H 2 ) are experimentally investigated and
analyzed. Results show that the mass absorbed of H 2 by the metal (LaNi 5 ) raise when T F decreasesand/or
when P H2 increases.