TY - JOUR
TI - Dynamic numerical study on phase change thermal storage heat transfer
AU - Cui Jie
AU - Wang Guofeng
AU - Guo Zhitang
AU - Yang Shuo
AU - Pan Honggang
AU - Shi Jianjun
AU - Xu Youning
JN - Thermal Science
PY - 2021
VL - 25
IS - 6
SP - 4171
EP - 4179
PT - Article
AB - Targeted at the poor heat transfer effect of the phase change thermal storage  heat exchanger due to the low thermal conductivity of the phase change  material, a fin-tube type phase change thermal storage heat exchanger has  been proposed in the study. A 2-D model of the phase-change heat storage  unit was established, and the dynamic heat transfer law of the melting and  solidification of the phase change material, and the influence of the fin  structure size on the heat storage/release performance of the heat exchanger  were numerically analyzed. The results show that in the area close to the  tube wall, the smaller the fin spacing, the larger the thickness, the faster  the phase change heat storage/release speed, and the better heat transfer  effect. In the central area of the phase change material, the greater the  fin spacing and thickness, and the better the heat transfer effect of the  phase change heat storage/release. The area close to the outer wall has the  smallest temperature change, and the heat storage/release effect is the  worst. Therefore, the use of energy storage heat exchangers with gradual fin  thickness and spacing is an effective method to improve the heat transfer  efficiency of existing equipment. In addition, in order to improve the heat  exchange effect of the edge area of the phase change, its structure could be  changed or the heat exchange form can be increased.