摘要
HT- 7U超导托卡马克的纵场磁体和极向场磁体均采用 3.8K超临界氦迫流冷却。其低温系统氦制冷机在 4K温区的基本设计容量为 10 5 0 W/3.5 K +2 0 0 W/4 .4K+13g/s· L He。给出了氦制冷机的基本流程 ,对其制冷循环进行了热力学分析 ,得到了影响制冷循环的关键独立参数。并以 2台串联透平膨胀机的排气温度为独立变量对氦制冷循环进行了优化 。
The toroidal magnet and poloidal magnet of HT-7U superconducting tokamak are cooled by forced flow supercritial helium of 3.8 K. The basic capacity of the helium refrigerator is 1 050 W/3.5 K+200 W/4.4 K+13 g/s·LHe. The flow sheet of the refrigerator and the thermodynamic analysis of the refrigeration cycle are presented. The optimization is conducted with the two independent variables-outlet temperatures of the two turbines in series. The optimum parameters of the cycle and their influence on the cycle efficiency are found through the optimization.
出处
《真空与低温》
2002年第3期144-148,共5页
Vacuum and Cryogenics
基金
国家"九五"大科学工程 HT- 7U项目资助
