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Simulated winding temperature distribution of HTS transformer cooled by sub-cooled liquid nitrogen  

Han, J.H. (Korea Polytechnic University)
Choi, K.D. (Korea Polytechnic University)
Kim, T.Y. (Korea Polytechnic University)
Chang, T. (Korea Polytechnic University)
Kim, W.S. (Seoul University)
Kim, S.H. (Seoul University)
Hahn, S.Y. (Seoul University)
Kim, S.R. (CVE)
Publication Information
Progress in Superconductivity and Cryogenics / v.6, no.4, 2004 , pp. 51-54 More about this Journal
Abstract
A 1 MV A single phase high temperature superconducting (HTS) transformer was manufactured. In order to reduce AC loss generated in the HTS winding, winding was concentrically arranged. Operation temperature is set at 65K to increase the critical current and reduce the amount of HTS tape usage and the volume. The cryogenic system which consists of main cryostat with the windings and secondary cryostat with 2 GM coolers and cryopump on top and heat exchanger inside is also designed and the cooling performance is simulated with Fluent. Temperature distribution of the windings is investigated whether the windings are kept under designed operation temperature.
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