低温真空电流引线热分析  

Current lead heat analysis in cryogenic vacuum

作　　者：石零[1] 

机构地区：[1]江汉大学化学与环境工程学院,武汉430056

出　　处：《低温工程》2005年第4期53-55,共3页Cryogenics

摘　　要：对在两级制冷机传导冷却下由高温超导和铜组成的二元电流引线进行热分析。给出了不同运行电流下,在室温温度(300 K)和制冷机一级冷头温度(77 K)间铜电流引线的温度、热流分布。认为大电流运行下,传导热等于焦耳热的一半时,在二元电流连接点的热流最小。给出了在最小热流下电流引线的尺寸优化方法。The heat analysis of binary current leads which consist of copper current lead and high temperature super conducting was made on condition that the lead was cooled by two-stage refrigerator. The temperature distribution and thermal flux distribution of copper lead were also given in range of room temperature （300 K） to one stage of refrigerator temperature （77 K） at different operating currents. When conductance heat is equal to half of Joule heat, the thermal flux at joint of binary current leads is minimum at large operating current. The optimization method about size of leads was given at minimum operating current. These will be helpful to engineering design.

关 键 词：热分析 温度分布 二元电流引线 最小热流 

分 类 号：TB611[一般工业技术—制冷工程]