Latent heat thermal energy storage technology can realize recovery and supply of heat during solid-state hydrogen storage and release process

achieving self-thermal balance inside the solid-state hydrogen storage tank

and improve the hydrogen storage and release performance. For horizontal tube and shell latent heat thermal energy storage exchanger

a new movement method where the inner tube is placed eccentrically to rotate around the central axis is proposed. By the Fluent software

the user-defined function UDF is written using the dynamic mesh technique

and the influence of eccentric distance and rotation velocity of the inner tube on heat storage performance is focused. The results show that

compared with the conventional static arrangement of the central inner tube

the rotation movement of the eccentric inner tube can improve the heat storage performance significantly. The heat storage time reaches the shortest when the eccentric distance is 9 mm and the rotation velocity is 0.10 r/min

namely decreases by 92.16%

and the time average heat storage rate increases by 11.51times. The heat storage time reduces by 13.57% when the eccentric distance is 9 mm and the rotation velocity is decreased from 0.30 r/min to 0.1 r/min

it decreases by 70.48% when the rotation velocity is 0.10 r/min and the eccentric distance is increased from 3 mm to 9 mm. The study results can provide a new idea for performance optimization of horizontal shell and tube latent heat thermal energy storage exchangers in hydrogen storage field.