Enhanced study of phase change thermal storage using active rotating tank wall coupled fins combined with eccentric design

Abstract

To address the low thermal conductivity of phase change materials and e improve heat storage, a novel rotating T-LHTESU structure is proposed. Numerical simulations systematically analyze the effects of rotation speed, various eccentricities and wall temperature on the performance of phase change heat storage. The results show that the introduction of rotation in the intermediate sleeve shortens the melting time with increasing rotation speed, reaching a maximum reduction of 61.66 % at 2 rps. Furthermore, the melting rate at 1 rps and 2rps first decreases and then increases with increasing eccentricity. At an eccentricity of 10 mm and 2 rps, the melting time is reduced by 7.23 % compared to the non-eccentric model. In addition, a higher wall temperature accelerates the change in the liquid phase fraction and increases the energy input. At a wall temperature of 371.15 K, the melting time is reduced by 73.56 % compared to the stationary model, with an increase in total heat by 2.52 %. This study provides theoretical guidelines for subsequent research on phase change heat transfer.