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

2004 ◽  
Vol 150 (1) ◽  
pp. 169-180 ◽  
Author(s):  
Abdulkadir Dogan ◽  
Yuksel Kaplan ◽  
T.Nejat Veziroglu
Keyword(s):  
Mass Transfer ◽  
Numerical Investigation ◽  
Heat And Mass Transfer ◽  
Metal Hydride

scholarly journals Numerical Investigation of Heat and Mass Transfer Processes while the Desorption of Hydrogen Gas Stored in MmNi4.6Fe0.4-H6

2016 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Ali Boukhari
Keyword(s):  
Mass Transfer ◽  
Numerical Investigation ◽  
Heat And Mass Transfer ◽  
Metal Hydride ◽  
Hydrogen Gas ◽  
Packed Bed Reactor ◽  
Heat Transfer Fluid ◽  
Reactor Performance ◽  
Transfer Processes ◽  
Mass Transfer Processes

This work presents a numerical investigation of two-dimensional coupled heat and mass transfer processes in a unit disc of an annulus-disc reactor filled with the intermetallic (Mischmetal) compound MmNi4.6Fe0.4, during the hydrogen gas desorption using the finite volume method. Temperature and amount of desorbed hydrogen and their time-averaged quantities inside the metal hydride bed are presented for different heat transfer fluid temperatures, and different metal thermal conductivities. Impacts of both effects on the metal hydride reactor performance in terms of discharging time are examined by means of a set of numerical simulations. Thus, the dehydriding time minimization relates to the adjustment of the amount of heat addition to the packed bed reactor. A good agreement was found between the present computational results and the experimental data reported in the literature.

scholarly journals Heat and mass transfer in a metal hydride reactor: combining experiments and mathematical modelling

2021 ◽  
Vol 2057 (1) ◽  
pp. 012122
Author(s):  
D O Dunikov ◽  
V I Borzenko ◽  
D V Blinov ◽  
A N Kazakov ◽  
I A Romanov ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Mass Flow ◽  
Metal Hydride ◽  
Porous Metal ◽  
Control Device ◽  
Variable Permeability ◽  
Flow Control Device ◽  
Porous Domain

Abstract Heat transfer in porous metal hydride (MH) beds determines efficiency of MH devices. We present a COMSOL Multiphysics numerical model and experimental investigation of heat and mass transfer in a MH reactor filled with 4.69 kg of AB5 type alloy (Mm0.8La0.2Ni4.1Fe0.8Al0.1). To achieve an agreement between the model and experiments it is necessary to include a flow control device (inlet valve or flow regulator) into the model. We propose a simplified and easy-to-calculate boundary condition based on a porous domain with variable permeability at reactor inlet. The permeability of the domain is connected with hydrogen mass flow by a PID controller. Thus, boundary conditions for the inlet pressure and mass flow are coupled and heat transfer inside the reactor could be calculated without additional assumptions applied to heat and mass transfer in the MH bed.

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