超导可控电抗器低温系统冷却管道设计

Cooling system analysis on high temperature superconducting controllable reactor

35k V超导可控电抗器工作在70K温区和交流工况下时,由于交流损耗和杜瓦漏热等因素影响,超导双饼端部及杜瓦内壁会产生温升,引起局部失超。文中对超导可控电抗器使用低温过冷液氮冷却进行了分析,调节冷却液流量,改变冷却管道分布和冷却液入口温度,进行了冷却效果的对比分析。仿真结果表明,增大冷却液流量、均匀分布冷却管道和降低冷却液入口温度能够降低杜瓦内温升。

The operating temperature of 35kV high temperature superconducting controllable reactor is designed as 70K. Due to the AC conditions, the thermal load caused by AC loss should be considered as well as the heat leakage from the container to avoid the temperature rise. The author made researches about the cooling technology of high temperature superconducting control- lable reactor with liquid nitrogen between 65K and 75K, changed the flux of the cooling liquid, the distribution of the cooling channels and the temperature of the cooling liquid, made comparisons of the cooling effect. The results indicate that the tempera- ture rise will decrease through increasing the cooling liquid flux, changing the distribution of the cooling channels and reducing the coolant temperature at the entrance.