000207115 001__ 207115
000207115 005__ 20181203023824.0
000207115 0247_ $$2doi$$a10.9714/psac.2015.17.1.010
000207115 037__ $$aARTICLE
000207115 245__ $$aHeat transfer monitoring between quenched high-temperature superconducting coated conductors and liquid nitrogen
000207115 269__ $$a2015
000207115 260__ $$c2015
000207115 336__ $$aJournal Articles
000207115 520__ $$aHigh-temperature superconducting coated conductors (HTS-CCs) are good candidates for resistive superconducting fault current limiter (RSFCL) applications. However, the high current density they can carry and their low thermal diffusivity expose them to the risk of thermal instability. In order to find the best compromise between stability and cost, it is important to study the heat transfer between HTS-CCs and the liquid nitrogen (LN2) bath. This paper presents an experimental method to monitor in real-time the temperature of a quenched HTS-CC during a current pulse. The current and the associated voltage are measured, giving a precise knowledge of the amount of energy dissipated in the tape. These values are compared with an adiabatic numerical thermal model which takes into account heat capacity temperature dependence of the stabilizer and substrate. The result is a precise estimation of the heat transfer to the liquid nitrogen bath at each time step. Measurements were taken on a bare tape and have been repeated using increasing Kapton® insulation layers. The different heat exchange regimes can be clearly identified. This experimental method enables us to characterize the recooling process after a quench. Finally, suggestions are done to reduce the temperature increase of the tape, at a rated current and given limitation time, using different thermal insulation thicknesses.
000207115 6531_ $$aResistive superconducting fault current limiter
000207115 6531_ $$ahigh-temperature superconducting coated conductors
000207115 6531_ $$aheat-transfer
000207115 6531_ $$athermal stability
000207115 700__ $$aRubeli, Thomas
000207115 700__ $$0244864$$g197107$$aColangelo, Daniele
000207115 700__ $$g105035$$aDutoit, Bertrand$$0240451
000207115 700__ $$aVojenčiak, Michal
000207115 773__ $$j17$$tProgress in Superconductivity and Cryogenics$$k1$$q10-13
000207115 909C0 $$xU12157$$0252330$$pSUPRA
000207115 909CO $$pIC$$particle$$ooai:infoscience.tind.io:207115
000207115 917Z8 $$x105035
000207115 917Z8 $$x105035
000207115 937__ $$aEPFL-ARTICLE-207115
000207115 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000207115 980__ $$aARTICLE