星载有源组件复合相变材料相变控温性能研究

为研究添加纳米粒子的复合相变材料应用与星载有源设备相变控温时的控温性能，采用了数值仿真的方式，使用ANASYS软件比较分析了硬脂醇改性石墨烯/正十八烷石蜡复合相变材料与纯正十八烷石蜡相变材料的相变控温性能。结果表明，在短时间控温时复合相变材料具有一定优势，同时在有源组件非工作时间散热时，复合相变材料可以在更短时间内将工作时间吸收的热量全部散去，恢复初始状态速度比纯正十八烷石蜡快14.1%，因此添加硬脂醇改性石墨烯纳米粒子的复合相变材料可以作为提升相变控温装置整体性能的一种有效辅助手段；同时针对与其他主要导热能力提升手段相结合后的控温性能进行了对比分析，复合相变材料可以起到提高控温装置性能的作用，可以与其他方式进行有效的结合。

Research on phase change temperature control performance of composite phase change materials for spaceborne active components

In order to study the application of composite phase change materials with nano particles and the temperature control performance of spaceborne active equipment in phase change control, uses the numerical simulation method to compare the temperature control performance of stearyl alcohol modified Graphene/n-octadecane paraffin composite phase change materials with that of pure n-octadecane paraffin phase change materials. The results show that the composite phase change material has certain advantages when temperature is controlled for a short time. At the same time, when the active components dissipate heat during non working hours, the composite phase change material can dissipate all the heat absorbed during working hours in a shorter time, and the speed of restoring the initial state is 14.1% faster than that of pure Octadecane paraffin. Therefore, the composite phase change material with stearyl alcohol modified Graphene nanoparticles can be an effective auxiliary means to improve the overall performance of the phase change temperature control device; at the same time, a comparative analysis was conducted on the temperature control performance after combining with other main methods to improve thermal conductivity. Composite phase change materials can play a role in improving the performance of temperature control devices and can be effectively combined with other methods.