翅片对相变炕传热性能的影响分析

Analysis of the Effect of Fins on the Heat Transfer Performance of Phase Change Kang

为提高相变炕的传热性能,提出了在相变炕内部添加高导热金属翅片的优化方案。通过数值模拟计算,分别探究了翅片的长度、厚度及数量对相变炕传热性能的影响。研究结果表明,翅片的长度及数量对相变炕传热性能影响显著,当炕体基本单元内翅片长度为30mm,数量为2根时,其对炕体传热增强效果最优,相较于空白对照组,添加翅片后,上炕面最大放热功率可以增大19.54%,上炕面平均温度可提升10.36%,上炕面与相变材料间的温差缩小27.36%。而翅片厚度对炕体传热性能的影响不明显。

In order to improve the heat transfer performance of the phase change kang,an optimized scheme of adding high thermal conductivity metal fins inside the phase change kang was proposed.In this paper,the effects of the length,thickness and number of fins on the heat transfer performance of the phase change kang were investigated through numerical simulation calculations.The research results show that the length and number of fins have a significant impact on the heat transfer performance of the kang.Compared with the blank control group,after adding fins,the maximum exothermic power of the upper kang surface can be increased by 19.54%,the average temperature of the upper kang surface can be increased by 10.36%,and the temperature difference between the upper kang surface and the phase change material can be reduced by 27.36%.However,the effect of fin thickness on the heat transfer performance of the kang is not obvious.