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Description
In this study, the quench initiation and propagation characteristics of second generation high temperature superconducting race-track coil (2G HTS RTC) are investigated in both experiment and simulation. This RTC is insulated by the metal-insulator transition (MIT) insulation material which has a variability of the contact resistance as a function of temperature. First, thermal quench tests with constant operating current and heater activation are performed to investigate the heat transfer characteristics of MIT RTC, such as the minimum quench energy and the transverse and longitudinal normal zone propagation velocities at the curve and straight section of RTC. Then, experimental results are compared and discussed with results of numerical simulation using finite element method.
Acknowledgment: This work was supported in part by the "Human Resources Program in Energy Technology" of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy (MOTIE), and by Korea Electric Power Corporation. (Nos. 20184030202200 and R18XA03).
