A comparison on the heat load of HTS current leads with respect to uniform and non-uniform cross-sectional areas

被引：0

作者：

Han S. ^{[1
]}

Nam S. ^{[1
]}

Lee J. ^{[1
]}

Song S. ^{[1
]}

Jeon H. ^{[1
]}

Baek G. ^{[1
]}

Kang H. ^{[2
]}

Ko T.K. ^{[1
]}

机构：

[1] Yonsei University, Seoul

[2] Korea National University of Transportation, Chungju

来源：

Progress in Superconductivity and Cryogenics (PSAC) | 2017年 / 19卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Heat load; HTS current lead; KSTAR TF coil; Non-uniform cross-sectional areas; Thermal conductivity;

D O I：

10.9714/psac.2017.19.3.044

中图分类号：

学科分类号：

摘要：

Current lead is a device that connects the power supply and superconducting magnets. High temperature superconductor (HTS) has lower thermal conductivity and higher current density than normal metal. For these reasons, the heat load can be reduced by replacing the normal metal of the current lead with the HTS. Conventional HTS current lead has same cross-sectional area in the axial direction. However, this is over-designed at the cold-end (4.2 K) in terms of current. The heat load can be reduced by reducing this part because the heat load is proportional to the cross-sectional area. Therefore, in this paper, heat load was calculated from the heat diffusion equation of HTS current leads with uniform and non-uniform cross-sectional areas. The cross-sectional area of the warm-end (65K) is designed considering burnout time when cooling system failure occurs. In cold-end, Joule heat and heat load due to current conduction occurs at the same time, so the cross-sectional area where the sum of the two heat is minimum is obtained. As a result of simulation, current leads for KSTAR TF coils with uniform and non-uniform cross-sectional areas were designed, and it was confirmed that the non-uniform cross-sectional areas could further reduce the heat load. © 2017, Korea Institute of Applied Superconductivity and Cryogenics. All rights reserved.

引用

页码：44 / 48

页数：4

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