A practical metal hydride based hydrogen storage device would consist of many filters to distribute hydrogen gas and heat exchanger tubes to cool or heat the hydride bed depending on whether hydrogen is being absorbed or desorbed. This paper presents the simulation of such a device with LaNi5 as the hydriding alloy. A study of the geometric and operating parameters has been carried out to identify their influence in the hydriding performance of the storage device. © 2007 International Association for Hydrogen Energy.

M. Prakash Maiya

Department of Mechanical Engineering

Computational geometry

Computer simulation

Heat exchangers

Parameter estimation

HYDRIDING ALLOY

Metal hydride

Hydrogen storage

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

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IIT Madras

International Journal of Hydrogen Energy

The absorption and desorption performances of a solid state (metal hydride) hydrogen storage device with a finned tube heat exchanger are experimentally investigated. The heat exchanger design consists of two “U” shaped cooling tubes and perforated annular copper fins. Copper flakes are also inserted in between the fins to increase the overall effective thermal conductivity of the metal hydride bed. Experiments are performed on the storage device containing 1 kg of hydriding alloy LaNi5, at various hydrogen supply pressures. Water is used as the heat transfer fluid. The performance of the storage device is investigated for different operating parameters such as hydrogen supply pressure, cooling fluid temperature and heating fluid temperature. The shortest charging time found is 490 s for the absorption capacity of 1.2 wt% at a supply pressure of 15 bar and cooling fluid temperature and velocity of 288 K and 1 m/s respectively. The effect of copper flakes on absorption performance is also investigated and compared with a similar storage device without copper flakes. © 2017 Hydrogen Energy Publications LLC

Experiments on solid state hydrogen storage device with a finned tube heat exchanger

Determination of the minimum total weight is the main criterion in the design of a solid state hydrogen storage device for mobile or portable applications. The design should address additional requirements such as storage capacity, charge/discharge rates, space constraints, coolant temperature and hydrogen supply pressure. The typical metal hydride based storage device studied here consists of several filters to distribute hydrogen gas, and heat exchanger tubes to cool or heat the hydride bed based on whether hydrogen is absorbed or desorbed. The total weight of the system includes hydrogen storage material, heat exchanger tubes and associated heat transfer media, porous sintered filters and the cylindrical outer container. Systematic simulation of the heat and mass transfer during hydrogen sorption has been carried out for different feasible configurations. LaNi5 is used as the representative hydriding alloy in the device as its sorption performance is limited by heat transfer in the bed. The effect of geometric parameters on total system weight and charging time are plotted at specified operating conditions. These plots are used for the design of hydrogen storage devices with minimum system weight satisfying the imposed constraints. © 2009 by ASME.

Proceedings of the ASME 3rd International Conference on Energy Sustainability 2009, ES2009

A cell based approach to determine the minimum weight of metal hydride hydrogen storage devices

Hydrogen Storage

Improvement on Hydrogen Storage Properties of Complex Metal Hydride

COMSOL MULTIPHYSICS MODEL FOR DWPF CANISTER FILLING

Experimental and theoretical analysis of hydrogen absorption in – reactors

Applied Mathematics and Computation

Numerical investigation of heat and mass transfer in a metal hydride bed

Prediction of transient heat and mass transfer in a closed metal–hydrogen reactor

Performance simulation of metal hydride hydrogen storage device with embedded filters and heat exchanger tubes

Journal	International Journal of Hydrogen Energy
ISSN	03603199
Open Access	No