Numerical Investigation of Heat and Mass Transfer During the Desorption Process of a LaNi5–H2 Reactor

Abstract

In this paper, coupled heat and mass transfer during the desorption process of a metal–hydrogen reactor (LaNi5–H2) is numerically investigated. To predict the dynamic behavior of this reactor, a new algorithm based on the lattice Boltzmann method (LBM) is proposed as a potential solver. Based on this algorithm, a computer code is developed using fortran 90. This algorithm is validated successfully by comparison with experimental data reported in the literature and results obtained by finite volume method (FVM). Using the developed code, the time–space evolutions of the temperature and the hydride density within the reactor are presented. In addition, the effect of some parameters (applied pressure, heating temperature, and overall heat transfer coefficient) on the dynamic behavior of the reactor is evaluated. Compared to the FVM, the proposed algorithm presents simple implementation on a computer and with reduced CPU time.

Heat and mass transfer processes of solid-state hydrogen discharging: a CFD study

“…The obvious dependency of H 2 gas sorption rates on heat transfer characteristics and reaction kinetics of the MH packed beds were argued by the literature [4,5]. Characteristics of the occurring simultaneous heat and mass transfers phenomena in hydride beds during H 2 sorption processes have been considered in numerous investigations, using a diversity of mathematical models; ranging from those having one dimension and focusing primarily on heat conduction [6], to those considering convection side by side to thermal conduction [7] followed by those combining the conduction, convection and thermal radiation effects [8,[10][11]. Other configurations had been studied in the geometrical framework notoriously; the two-dimensional models of the works [8][9][10][11], and the illustrious three-dimensional model present in the studies of Aldas et al [4].…”

“…Characteristics of the occurring simultaneous heat and mass transfers phenomena in hydride beds during H 2 sorption processes have been considered in numerous investigations, using a diversity of mathematical models; ranging from those having one dimension and focusing primarily on heat conduction [6], to those considering convection side by side to thermal conduction [7] followed by those combining the conduction, convection and thermal radiation effects [8,[10][11]. Other configurations had been studied in the geometrical framework notoriously; the two-dimensional models of the works [8][9][10][11], and the illustrious three-dimensional model present in the studies of Aldas et al [4]. Several carried out works [8][9][10] led to the conclusion that thermal radiation effects on sorption process are insignificant in case of LaNi 5 -based hydrogen storage devices (i.e.…”

“…Other configurations had been studied in the geometrical framework notoriously; the two-dimensional models of the works [8][9][10][11], and the illustrious three-dimensional model present in the studies of Aldas et al [4]. Several carried out works [8][9][10] led to the conclusion that thermal radiation effects on sorption process are insignificant in case of LaNi 5 -based hydrogen storage devices (i.e. low-temperature hydrides), and are significant for the Mg-based hydrogen storage devices (i.e.…”