机械泵驱动两相冷却系统工作点温度控制  

Set point controlling of mechanically pumped cooling loop

作　　者：刘杰[1] 郭开华[2] 李庭勋[2] 

机构地区：[1]青岛理工大学环境与市政工程学院,山东青岛266033 [2]中山大学空间技术中心,广东广州510275

出　　处：《中南大学学报（自然科学版）》2009年第4期974-979,共6页Journal of Central South University:Science and Technology

基　　金：科技部国际科技合作重点资助项目(2003DF000050);国家"973"计划前期研究专项项目(2006CB708613);广东省人民政府科技专项项目(05003274)

摘　　要：对系统的控温原理和主要方法进行理论阐述,从而确定采用对储液器温度的主动式控温方法实现对蒸发段工作温度的控制思路。提出"回路直接冷却"和"半导体制冷片——系统回路协同工作"这2种储液器温度控制方法,并且对其控温精度和降温速度等技术进行实验研究。结果表明,改进前,采用"冷回路"向储液器漏热并结合加热器实现温度控制的设计方案控温精度仅为±0.4℃,且在需要快速降低蒸发段工作温度时较难实现;改进后,采用半导体制冷片同系统管路协同运行的方法不仅可控性大大增加,而且降温速度从原来的0.12℃/min提高到0.36℃/min。在模拟外太空边界温度波动幅度的条件下,改进前、后温度控制方法蒸发段的控制精度分别为±0.4℃和±0.1℃,从而克服了该类系统在工作温度控制中降温速度慢、控温精度低的缺点,并可推广到热管、毛细泵驱动回路等类似的航空航天两相冷却系统中。The brief review of system design and work principle about evaporative temperature controlling was presented. Two kinds of methods were described, especially the second one which combined thermoelectric coolers （TEC） with a branch of the main loop. In order to prove the feasibility and efficiency, tests were performed to clearly comprehend the characteristics of two designs. Special attentions were paid to comparing the controlling precision and cooling rate for the accumulator temperature. The results show that the method which cooled the accumulator by heat leak has not only a less precision but also a lower cooling rate. Whereas, the improved design can improve the cooling rate from 0.12℃/min to 0.36℃/min and realize a ±0.1℃ close temperature controlling precision. A novel way is found for the two-phase cooling loop, such as capillary pumped loop or loop heat pipe, to realize a proper set point temperature controlling.

关 键 词：机械泵驱动冷却回路 温度控制 两相流 半导体制冷 热管 

分 类 号：TK124[动力工程及工程热物理—工程热物理]