低温制冷机与ZBO存储系统耦合数值模拟  

Numerical simulation of cryocooler and zero boil-off storage system coupling

作　　者：冶文莲[1] 王丽红[1] 王田刚[1] 孙述泽[1] 

机构地区：[1]兰州空间技术物理研究所,真空低温技术与物理重点实验室,兰州730000

出　　处：《低温与超导》2013年第8期19-23,共5页Cryogenics and Superconductivity

基　　金：真空低温技术与物理国家级重点实验室基金(9140C550604)资助

摘　　要：介绍了基于低温液体压力控制技术搭建的一套小型实验装置,并针对实验中的一项关键内容-低温制冷机与零蒸发(ZBO)存储系统耦合建立了采用CFD软件的数学模型。根据实验装置中的已知参数以及设计计算结果,模拟了制冷机关闭状态下不同时刻液氮贮箱内流体分布、制冷机开启状态下分别采用紫铜箔与高温热解石墨传热元件时,低温贮箱内流体及导热带上温度分布情况。由模拟结果得知,石墨比紫铜具有更强的冷量传输能力,使贮箱内液氮温度和压力更低,体现了高效耦合性,从而在理论上验证了采用石墨传热元件的可行性。最后针对实际情况,提出了石墨与铜导热带相结合的传热结构。A pint- size experimental equipment based on cryogenic fluid pressure control was introduced, and a numerical simulation using CFD software of cryocooler and zero boil - off storage system coupling which was a key technology of the experi- mentation was made. According to the parameters in the experimental equipment and the calculated results, the temperature dis- tribution of the liquid of nitrogen storage tank was simulated respectively when cryocooler was closed or running. The results indi- cated that graphite made the temperature and pressure in the cryogenic storage tank lower while it had a better transfer capacity comparing to the copper, which meant high efficiency coupling. The results above indicated the feasibility of the heat transfer component of graphite theoretically. The heat - transfer structure of combination of graphite and copper was concerned according to the real condition.

关 键 词：耦合 低温制冷机 实验装置 数值模拟 

分 类 号：TB651[一般工业技术—制冷工程]