微胶囊流体脉动热管的热输送性能

Heat-Transport Capability of Pulsating Heat Pipes for Microcapsule Fluid

将外径为2.5mm、内径为1.3mm的铜管加工成四环脉动热管,在不同工质（3%的FS-39E型微胶囊流体、乙醇、水）和充液率（40%-80%）下探讨了脉动热管的启动特性,以及工质和充液率对脉动热管热输送性能的影响.结果表明：脉动热管的启动与充液率、热驱动力和工质有关;相比于乙醇和水,微胶囊流体作为工质时,脉动热管具有较宽的工作范围,尤其在高充液率的条件下,热管表现出良好的启动性能和热输送性能.

A four-turn pulsating heat pipe （PHP） was made from a copper tube with its outer diameter of 2. 5 mm and inner diameter of 1.3mm. The startup characteristics of the PHP were then investigated at various liquid-filling rates of 40% -80%, respectively with 3% FS-39E microcapsule fluid, ethanol and water as the working fluids. Moreover, the effects of working fluid and liquid-filling rate on the heat-transport capability were analyzed. The re- suhs show that the startup of PHP is related to the liquid-filling id, and that, as compared with ethanol and water, 3% FS-39E range of PHP, and particularly high heat-transport capability. at a high liquid-filling rate, the rate, the thermal driving force and the working flumicrocapsule liquid may result in a broader working PHP possesses excellent startup characteristics and