TY - JOUR
T1 - Modeling of quench behavior of YBa 2 Cu 3 O 7-δ pancake magnets and distributed-temperature-sensing-based quench detection for operating temperature 30-77 K
AU - Zhou, Jún
AU - Chan, Wan Kan
AU - Schwartz, Justin
N1 - Funding Information:
Manuscript received July 5, 2018; revised August 31, 2018; accepted September 28, 2018. Date of publication October 8, 2018; date of current version November 14, 2018. This work was supported by the National Natural Science Foundation of China under Grant 11272139, Grant 11421062, and Grant 11032006 and by the China Scholarship Council Foundation under Grant 201306185002. This paper was recommended by Associate Editor Liye Xiao. (Corresponding author: Jùn Zhou.) J. Zhou is with the Key Laboratory of Mechanics on Disaster and Environments in Western China, Ministry of Education of China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China (e-mail:,zhoujun@lzu.edu.cn).
Publisher Copyright:
© 2018 IEEE.
PY - 2019/1
Y1 - 2019/1
N2 - A two-dimensional/three-dimensional (2-D/3-D) mixed electrothermal model is proposed for the simulation of quench behavior of high-temperature superconducting (HTS) pancake magnets, where a 2-D electrothermal model is proposed to simulate the YBa 2 Cu 3 O 7-δ (YBCO) subcoil and is coupled with the remaining parts of the YBCO magnet, which are treated as 3-D homogeneous coils. For operating temperature from 30 to 77 K, the quench behavior of four YBCO pancake coils (two Kapton-insulated coils and two TiO2 -insulated coils) are simulated. Thermal equilibrium states are found for both Kaptonand TiO2 -insulated coils. The thermal conductivity of insulating materials (Kapton, TiO2 ) significantly affects the equilibrium temperature profiles (ETPs) and the minimum quench energy (MQE), especially for relatively high operating temperature (e.g., 65-77 K). The distributed-temperature-sensing-based (DTS-based) quench detection criterion can be established on ETPs. The effect of the thickness of insulating materials on ETPs and MQEs is relatively weak, especially under relatively low operating temperature. The key parameters of ETP-based quench detection criterion, such as the reference temperature, the peak temperature, and the minimum normal zone size, are obtained for the operating temperature from 30 to 77 K.
AB - A two-dimensional/three-dimensional (2-D/3-D) mixed electrothermal model is proposed for the simulation of quench behavior of high-temperature superconducting (HTS) pancake magnets, where a 2-D electrothermal model is proposed to simulate the YBa 2 Cu 3 O 7-δ (YBCO) subcoil and is coupled with the remaining parts of the YBCO magnet, which are treated as 3-D homogeneous coils. For operating temperature from 30 to 77 K, the quench behavior of four YBCO pancake coils (two Kapton-insulated coils and two TiO2 -insulated coils) are simulated. Thermal equilibrium states are found for both Kaptonand TiO2 -insulated coils. The thermal conductivity of insulating materials (Kapton, TiO2 ) significantly affects the equilibrium temperature profiles (ETPs) and the minimum quench energy (MQE), especially for relatively high operating temperature (e.g., 65-77 K). The distributed-temperature-sensing-based (DTS-based) quench detection criterion can be established on ETPs. The effect of the thickness of insulating materials on ETPs and MQEs is relatively weak, especially under relatively low operating temperature. The key parameters of ETP-based quench detection criterion, such as the reference temperature, the peak temperature, and the minimum normal zone size, are obtained for the operating temperature from 30 to 77 K.
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U2 - 10.1109/TASC.2018.2874423
DO - 10.1109/TASC.2018.2874423
M3 - Article
AN - SCOPUS:85054525928
SN - 1051-8223
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 1
M1 - 4700311
ER -