基于相变储能系统的储能及热管理性质,结合热管的热超导性与均温性,设计了一种耦合热管的储能型热管理装置。对装置在不同工况下进行测试,获得了装置各部分的温度分布及热管热阻变化。结果表明,引入储能模块可有效降低系统中热管热阻及蒸发端温度,保证了热管良好的均温性质,其中在20~160 W热输入区间测试时,添加储能单元的系统热管热阻降低了35.5%~44.5%,在80 W热输入时存在热阻最小值为0.053 91℃/W。通过对比装置不同放置角度下相变材料(PCM)熔化特性及热管性能发现,水平放置时自然对流影响更为显著,PCM熔化速率更快,熔化更均匀,储能装置中PCM储能效果更佳,系统热阻最小。同时,由于PCM存储了一部分输入热量,可达到一个优异的热管理效果,有效地提高了系统的稳定性及可靠性。

Based on the energy storage and thermal management properties of phase change energy storage system,an energy-storage thermal management device coupled with heat pipe is designed through combining with the thermal superconductivity and temperature uniformity of heat pipe.The temperature distribution of each part of the device and the change of thermal resistance of heat pipe are obtained by testing the developed device under different working conditions.Results show that the coupling of energy-storage module can effectively reduce the thermal resistance of heat pipe and the temperature of evaporation end in the system,which ensures the good temperature uniformity of the heat pipe.The thermal resistance of heat pipe in the system that is coupled with energy-storage module decreases by 35.5%-44.5% when the test is performed in the heat input range of 20 W-160 W.Furthermore,the minimum thermal resistance of the heat pipe is 0.053 91℃/W at 80 W of heat input.By comparing the melting characteristics and heat pipe properties of phase change material (PCM) at different placement angles of the device,it is found that natural convection has more significant effect under horizontal placement,meanwhile PCM has a faster melting rate and more uniform melting,PCM in the energy storage device has better energy-storage effect,and the thermal resistance of the developed system is minimum.On the other hand,because PCM stores part of the input heat,it can achieve an excellent heat management effect and effectively improve the stability and reliability of the system.

农增耀(1995-),男,硕士生