1.8K常压超流氦低温系统的设计与分析  

Design and analysis of a 1.8K-atmospheric super fluid helium cryogenic system

作　　者：郝强旺[1] 刘华军[1] 武玉[1] 刘勃[1] 彭晋卿[1] 

机构地区：[1]中国科学院等离子体物理研究所,合肥230031

出　　处：《低温工程》2012年第6期1-4,共4页Cryogenics

基　　金：国家自然科学基金项目(No.51177163)

摘　　要：中国科学院等离子体物理研究所ITER CC导体测试装置背景超导磁体,由4.2 K液氦浸泡冷却,能够提供7 T背景场,为了满足超导导体测试需要更大背景场(10 T)的要求,将采用1.8 K超流氦浸泡冷却。针对该测试装置的低温系统设计了一种1.8 K常压超流氦低温系统,给出了该系统的关键组成部分并对获取1.8 K常压超流氦的流程进行了分析。针对预冷与节流相结合获取1.75 K超流氦方案进行了分析和计算,同时针对此方案给出了其物理过程的T-s图,计算了1.75 K超流氦液体得率。The superconducting magnet of the testing facility in Institute of Plasma Physics, Chinese Academy of Sciences（ASIPP）for ITER CC conductor was immersed by the 4.2 K liquid helium cooling to provide a 7 T background magnetic field. In order to meet the demands of superconducting conductor test requi- ring a larger background field （10 T） ,the superconducting was immersed by a 1.8 K super fluid helium. A 1.8 K-atmospheric super fluid helium cryogenic system was designed for the testing facility, the system＇s key components were given and how to obtain the 1.8 K-atmospheric super fluid helium was analyzed. Calculation and analysis of the throttling process according to pre-cooling and the temperature-entropy diagram of the process were put forward. The liquid ratios of super fluid helium of the method was computed and given.

关 键 词：超流氦 低温系统 温-熵图 

分 类 号：TB661[一般工业技术—制冷工程]