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

An optimization study on the finned tube heat exchanger used in hydride hydrogen storage system – analytical method and numerical simulation

“…As mentioned before, the tip clearance consists of thermal resistance to the heat transfer, which can be estimated by Eq. (11). Fig.…”

“…It is noted that the mere increase of external heat convection coefficient beyond a certain value will no longer affect much the charging/discharging time of metal hydride systems, although from the economical standpoint [10], external heat transfer enhancements, such as the use of cooling jackets, external fins and thermostatic bath are cheap and easy to realize. Due to the low thermal conductivity of metal hydride powder, the bed thickness is an important geometric parameter which affects the heat transfer rate [11]. Therefore, internal heat transfer enhancements have become more attractive and can roughly be divided in two ways: -Thermal conductivity enhancement by insertion of metal matrices of high thermal conductivity, such as copper wire net structure [12], copper or aluminum foam [13,14].…”

Numerical Simulation of Metal Hydride Hydrogen Storage Device with Pin Fin Tube Heat Exchanger

“…ρ t,a and ρ t,d are the transient density for absorption and desorption processes. Equilibrium pressure P eq inside the storage device can be given by vant's Hoff relationship [6]:…”

Numerical simulation of the parametric influence on the wall strain distribution of vertically placed metal hydride based hydrogen storage container

“…Even though thermo-physical properties are kept constant in several studies, more accurate models consider these properties as appropriate functions of hydrogen concentration, temperature and porosity. A discussion on thermal design and heat and mass transfer aspects of practical metal hydride based hydrogen storage devices have been made by the author [5,6]. These studies identified bed thickness, hydrogen supply pressure and coolant temperature as the salient parameters affecting hydrogenation performance.…”