气氮调温热沉系统设计

Heat Sink Temperature Adjusting System Design Base on Nitrogen

我国空间环境模拟试验中,多采用表面温度低于-173℃的热沉在地面模拟空间冷黑环境,与太空-270℃真实冷黑环境相比,模拟误差可控制在1%左右。随着我国深空探测的发展,特别是火星探测任务的提出,使用传统的液氮单相密闭循环制冷热沉达不到火星地表温度-123~27℃,无法满足火星探测模拟试验需求,采用调温热沉技术可解决此问题。介绍了气氮调节热沉温度的工作原理与系统主要组成部件的结构型式,对系统关键参数进行了分析计算,并完成了试验验证。

In the space environment simulation test,we use heat sink below-173 ℃ to simulate the space environment. The simulation error can be controlled at about 1% compared with the real space environment. With the development of deep space exploration,especially with the proposal of Mars exploration mission,the temperature of Mars surface is -123~ 27 ℃. The traditional single-phase liquid nitrogen cycle can not meet the needs of Mars exploration simulation test,so the technology of temperature-adjusted heat sink is indispensable. In this paper,we use nitrogen to regulate the temperature of heat sink,and calculate the key parameters of the system.