EAST装置2 kW/4.5 K氦制冷机透平膨胀机的测试

EAST装置于2006年成功进行工程调试和物理实验,全部超导磁体均已冷却到液氦温度,并获得了第一次等离子体.低温系统共有4台俄制氦透平膨胀机,通过气体绝热膨胀来获得低温.实验表明4台透平的设计满足EAST装置对冷量的需求,透平效率略低于设计值,流量比设计值大.介绍了EAST低温系统中4台透平膨胀机的设计参数、启动过程和运行,并对透平膨胀机在运行过程中的性能参数进行测试和分析.

Testing for turbines of EAST 2 kW/4.5 K helium refrigerator plant

EAST(Experimental Advanced Super-conducting Tokamak) is an experimental device for controlling nuclear fusion.In 2006,the engineering commissioning of EAST has already been done successfully.All of the superconducting magnets have been cooled down to LHe temperature.First plasma has been obtained in the campaign of plasma physics experiments.In the helium refrigerator,there are 4 turbines,which is used to get the low temperature by isentropic expanding of helium.The experiment results indicate that the 4 turbines meet the demands of EAST.The efficiency is little lower,but the flowrate is higher.The parameters of the turbines are described.The test results in the first cool down of EAST and the analyses of the performances of the 4 turbines are also presented.