低温回路热管技术研究

Research on Cryogenic Loop Heat Pipe Technology

作为一种高效的两相传热装置,环路热管主要利用工质的气液相变实现热量的远距离传输,因此工质的性质及充装系数对其性能具有很大影响。主要对影响低温回路热管性能的几种关键因素(包括工质品质因数、充液率、重力等)进行了理论及实验研究,并对回路热管进行了优化。将脉管制冷机作为冷源,对其与回路热管进行了集成应用性能研究,为回路热管的空间应用奠定了理论及实验基础。

As a high efficient two-phase heat transfer device,the loop heat pipe implements far distance transfer of heat mainly by using the gaseous phase change of a working fluid.Therefore,the nature of working fluid and its filling ratio have a great influence on the performance of the loop heat pipe.Several key factors including figure of merit,fluid filling rate and gravity that have influences on the performance of loop heat pipes are studied theoretically and experimentally.The loop heat pipes are optimized.By using a pulse-tube cooler as the cold source,the application performance of it integrated with the loop heat pipe is studied.This research has laid the theoretical and experimental foundation for the space application of loop heat pipes.