基于氮化硅陶瓷毛细芯的低温回路热管研究

Study of Cryogenic Loop Heat Pipe Based on Si_3N_4 Ceramic Wick

利用氮化硅陶瓷多孔材料作为毛细芯设计了一种以乙烷为工质的低温回路热管样机,并对其降温及传热性能进行了研究。试验结果表明,通过在蒸发器上施加4 W的热量,这种低温回路热管能够在常温下实现启动,并能顺利实现降温;在降温过程中,通过不断增大加热功率,可以加快低温回路热管的降温;当蒸发器的温度为190 K时,该样机可以稳定传输30 W的热量。

By using the Si3N4 ceramic porous material as a wick, a cryogenic loop heat pipe prototype which uses ethane as its working fluid is designed. The cool-down and heat transfer performance of the prototype is studied. The experimental results show that this cryogenic loop heat pipe can operate at room temperature and realize cool-down smoothly when 4 W heat is applied on the evaporator. In the cool-down process, the cool-down of the cryogenic loop heat pipe may quicken with the increase of heat power. When the temperature of the evaporator is 190 K, the prototype can transfer 30 W heat stably.