密闭空间温湿度条件对LiOH吸收效率的影响  

Influence of Temperature and Humidity on Absorption Efficiency of LiOH in Confined Space

作　　者：杨国威[1] 卞强[1] 余青霓[1] 魏巍[1] 

机构地区：[1]中国航天员科研训练中心,北京100094

出　　处：《载人航天》2012年第5期14-18,共5页Manned Spaceflight

摘　　要：针对航天器故障状态下,密闭空间温湿度可能会出现较大变化的问题,提出探索温湿度变化与LiOH吸收效率的关系。通过模拟产品使用工况,采取小样试验的方法,探索不同温湿度条件的模拟气体对LiOH吸收效率的影响。结果表明,相同温度条件下,相对湿度在70%以下,不会形成游离水和大块水合结晶;水蒸汽在临近饱和状态,尤其是相对湿度95%以上,材料表面会形成局部冷凝水溶液和大块水合结晶,阻碍反应进行,使LiOH吸收效率显著降低。相同湿度条件下,温度对反应器有效工作时间影响不大,对吸收剂LiOH的吸收效率影响不明显。The temperature and humidity in the confined space may change greatly when a spacecraft is not operating normally. For that reason, it is important to explore the relationship between changes in temperature and humidity and LiOH absorption rate. Through simulating the working conditions, the influence of different temperature and humidity conditions on LiOH absorption efficiency is studied. Results show that under the same temperature condition, when the relative humidity is below 70%, free water and chunks of hydrated crystal will not form; but if the water vapor is near the saturation point, especially when relative humidity is above 95%, partial condensate aqueous solution and a bulk of hydrated crystal will form on the surface, which will hinder the reaction, and significantly lower the LiOH absorption efficiency. Under the same humidity conditions, the influence of temperature on the effective working time of the reactor is little, and the influence on LiOH absorption efficiency unobvious.

关 键 词：密闭空间 温湿度 有效工作时间 吸收效率 

分 类 号：V416.5[航空宇航科学与技术—航空宇航推进理论与工程]