石蜡相变储能模块的控温性能研究

Temperature Control Performance of Paraffin Phase Change Energy Storage Module

中文关键词: 石蜡  相变储能  导热系数  控温

英文关键词: paraffin  phase change energy storage  thermal conductivity  temperature control

中文摘要:

      目的 为了控制电子设备工作温度，研发一种相变储能模块，并研究其控温性能。方法 本文通过仿真对以32号石蜡、62号石蜡和质量分数为6%的膨胀石墨(EG)-62号石蜡为相变工质的储能模块进行研究，分析相变材料、翅片材料以及加热功率对相变储能模块控温性能的影响。结果 32号石蜡在900 s时接近完全融化，62号石蜡在2 000 s时才融化过半，膨胀石墨-石蜡复合材料在1 250 s就已经接近完全融化，填充62号石蜡的Al翅片模块的温升速率为0.035 ℃/s，Cu翅片模块的温升速率为0.03 ℃/s，相比未填充相变材料的模块温升速率分别降低了73.1%和70%。结论 具有不同物性参数的相变材料，在不同工况下其呈现的控温性能也各不相同，但是在较高功率工况下，熔点较低或导热系数较高的相变材料具有更好的控温性能。储能模块内部导热翅片对内部强化换热效果明显，翅片导热系数越高，越有利于模块的控温。

英文摘要:

      The work aims to develop a phase change energy storage module and study its temperature control performance, in order to control the operating temperature of electronic equipment. The energy storage module with No. 32 paraffin, No. 62 paraffin and 6% expanded graphite (EG) - No. 62 paraffin wax as the phase change working medium was studied by simulation, and the effect of phase change materials, fin materials and heating power on the temperature control performance of the phase change energy storage module was analyzed. No. 32 paraffin nearly melted at 900 s, No. 62 paraffin only melted half of the way at 2 000 s, and the expanded graphite-paraffin composite material nearly melted at 1 250 s. The temperature rise rate of Al fin module filled with No. 62 paraffin was 0.035 ℃/s, and that of Cu fin module was 0.03 ℃/s. Compared with unfilled PCM modules, the temperature rise rate was reduced by 73.1% and 70%, respectively. Phase change materials with different physical parameters have different temperature control performance under different working conditions, but at higher power, the phase change materials with lower melting point or higher thermal conductivity have better temperature control performance. The internal thermal conductivity framework of the energy storage module has obvious effect on internal enhanced heat transfer, and the higher the thermal conductivity of the framework, the more beneficial the temperature control of the module.