Numerical simulation of the hydrogen storage with reaction heat recovery using metal hydride in the totalized hydrogen energy utilization system

Numerical simulation of a hydrogen storage tank of a Totalized Hydrogen Energy Utilization System (THEUS) for application to commercial buildings was done to verify the practicality of THEUS. THEUS consists of a fuel cell, water electrolyzer, hydrogen storage tank and their auxiliary machinery. The...

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Bibliographic Details
Published in:International journal of hydrogen energy 2011-08, Vol.36 (17), p.10845-10854
Main Authors: Maeda, Tetsuhiko, Nishida, Keiichi, Tange, Manabu, Takahashi, Toru, Nakano, Akihiro, Ito, Hiroshi, Hasegawa, Yasuo, Masuda, Masao, Kawakami, Yoshiaki
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Computer simulation
Electrolytic cells
Energy
Energy utilization
Exact sciences and technology
Fuels
Hydrogen
Hydrogen energy system
Hydrogen storage
Mathematical models
Metal hydride
Metal hydrides
Reaction heat recovery
Simulation model
Storage tanks
Tanks
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Summary:Numerical simulation of a hydrogen storage tank of a Totalized Hydrogen Energy Utilization System (THEUS) for application to commercial buildings was done to verify the practicality of THEUS. THEUS consists of a fuel cell, water electrolyzer, hydrogen storage tank and their auxiliary machinery. The hydrogen storage tanks with metal hydrides for load leveling have been previously experimentally investigated as an important element of THEUS. A hydrogen storage tank with 50 kg AB5 type metal hydride was assembled to investigate the hydrogen-absorbing/desorbing process, which is exothermic/endothermic process. The goal of this tank is to recover the cold heat of the endothermic process for air conditioning, and thus improve the efficiency of THEUS. To verify the practical effectiveness of this improved system, we developed a numerical simulation code of hydrogen storage tank with metal hydride. The code was validated by comparing its results with experimental results. In this code the specific heat value of the upper and lower flanges of the hydrogen storage tank was adjusted to be equal to the thermal capacity of the entire tank. The simulation results reproduce well the experimental results. ► Numerical simulation for totalized hydrogen energy system (THEUS) was done. ► THEUS consists of electrolyzer, Hydrogen storage fuel cell, etc. ► To verify the effectiveness of THEUS, we developed a simulation code. ► The simulation results reproduce well the experimental results.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2011.06.024