Mathematical modeling, numerical simulation and experimental comparison of the desorption process in a metal hydride hydrogen storage system

Abstract

A two-dimensional axisymmetric model is developed to study the hydrogen desorption reaction and its subsequent discharge in a metal hydride canister. Experimental tests are performed on an in-house fabricated setup. An extensive study on the effects of the metal properties and boundary conditions on discharging performance is carried out through nondestructive testing (NDT). Results show that the desorption process is more effective if the activation energy for desorption (Ed) and the reaction enthalpy (∆H) decrease, and when the desorption rate coefficient (Cd) and the external convection heat transfer coefficient when the bottle is being heated (h) increase. Furthermore, porosity (ε) can be useful for the design of hydrogen storage systems, with a trade-off between charge/discharge time and storage capacity. Numerical and experimental results are compared achieving a good agreement. These results can be used to select metal hydride materials and also for the future evaluation of metal hydride degradation.

A suitable design of metal hydride cartridge for a fuel cell assisted bicycle in consideration of heat transfer performance

“…The thermophysical properties of LmNi4.73Mn0.12Al0.15 are approximated from those of LaNi5, which is the same type (AB5-type alloy) of MH as LmNi4.73Mn0.12Al0.15. This assumption, which replaces the thermophysical properties of other MHs, was made in a previous study [3]. 4.…”

“…Jemni and Nasrallah developed 2D hydrogen desorption and absorption simulation models [2]. Raquel et al conducted a sensitivity analysis on the effects of MH properties, such as enthalpy and porosity, on the temperature and pressure in an MH vessel [3]. Darzi et al used a phase-change material jacket that could absorb energy as heat and then supply it to the MH vessel [4].…”

Computational Fluid Dynamics Simulation and Energy Consumption Analysis of Metal Hydride in Its Hydrogen Charging Process

“…73Mn0.12Al0.15. This assumption to replace the thermophysical properties with other MHs has been used in a previous study 9) .…”

Experimental investigation on absorption and desorption characteristics of La 0.9 Ce 0.1 Ni 5 for hydrogen storage application

“…Renewable energy sources are often limited for commercial use due to their intermittent nature that is, inconsistency of required energy supply and demand 1,2 . Hydrogen economy is considered as an significant strategy to achieve the effective utilization renewable energy resources 3,4 . In hydrogen economy, hydrogen is produced using renewable energy sources and used extensively as an energy carrier 5‐7 .…”

“…1,2 Hydrogen economy is considered as an significant strategy to achieve the effective utilization renewable energy resources. 3,4 In hydrogen economy, hydrogen is produced using renewable energy sources and used extensively as an energy carrier. [5][6][7] Hydrogen fuel has several potential applications, including fuel cell for power generation, fuel cell vehicles, internal combustion engines and steel industries.…”