相变储能拓扑翅片的性能研究

In order to improve the temperature uniformity of the phase change material domain and the heat transfer rate of the finned tube energy storage system, two types of fractal structures and their corresponding fin volume fraction were used as design parameters, and lauric acid was used as the phase change material to carry out topology optimization design. This was done using the Solid Isotropic Material with Penalty method. The thermal conductivity enhancement and temperature uniformity of topology optimization are compared. The findings indicate that the topology optimization has a better thermal conductivity impact and can shorten the overall solidification time by 21.18% and 12.68%, respectively, when the wall temperature is 20 ℃. The phase change material temperature is reduced by 7.33 ℃ and 4.30 ℃, 0.98 ℃ and 3.85 ℃ on average. At the same time, the topology optimization also has better temperature uniformity, and the average variance of phase change material is 33.38% and 72.13% of the corresponding fractal, respectively. When the wall temperature deviates from the design parameters of the topology, the thermal performance does not change. This study provides some reference for fin design.