环路热管精密控温性能的热真空实验研究

Thermal Vacuum Test on the Precise Temperature Controlling Performance of Loop Heat Pipe

本文研制了一套高性能的改进型环路热管,具有驱动功率与散热功率分离的特点,具备对多个分散热源的控温与散热能力。为验证改进型环路热管的精确控温的性能,本文以CCD相机的4个CCD器件作为控温对象,在热真空环境下,对环路热管进行了稳态运行测试、热补偿功率测试及不同蒸发器加载功率测试。实验结果表明:通过控制改进型环路热管的储液器温度可以实现控制CCD器件的温度,控温精度在±0. 5℃以内;对于CCD器件开关机引起的温度波动,提出了3种维持器件温度稳定性的方法,并通过实验及理论分析验证了其可行性。

An improved loop heat pipe(LHP) with high performance was developed in this paper. It has temperature controlling and heat-dissipating characteristics for multi-distributed heat sources by detaching the driving and dissipating power. To investigate the precise temperature controlling performance,the improved LHP was tested for the thermal control of four charge-coupled device(CCD) components on a camera in a vacuum chamber;stable operating tests,heat compensation power tests,and different powers on the evaporator tests were carried out. Test results showed that the improved LHP can control the temperature of the CCD in the range of ±0. 5 ℃ by controlling the accumulator temperature. Three methods to maintain the CCD temperature stability were introduced for the temperature fluctuations caused by device switches and their feasibilities were verified through experimental and theoretical analysis.