Title :
Prediction of burnout of a conduction-cooled BSCCO current lead
Author :
Seol, S.Y. ; Cha, Y.S. ; Niemann, R.C. ; Hull, J.R.
Author_Institution :
Dept. of Mech. Eng., Chonnam Nat. Univ., Kwangju, South Korea
fDate :
6/1/1997 12:00:00 AM
Abstract :
A one-dimensional heat conduction model is employed to predict burnout of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ current lead. The upper end of the lead is assumed to be at 77 K and the lower end is at 4 K. The results show that burnout always occurs at the warmer end of the lead. The lead reaches its burnout temperature in two distinct stages. Initially, the temperature rises slowly when part of the lead is in flux-flow state. As the local temperature reaches the critical temperature, it begins to increase sharply. Burnout time depends strongly on flux-flow resistivity.
Keywords :
bismuth compounds; calcium compounds; copper compounds; high-temperature superconductors; power cables; strontium compounds; superconducting cables; superconducting transition temperature; 4 K; 77 K; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/ HTSC current leads; burnout prediction; burnout temperature; critical temperature; flux-flow resistivity; flux-flow state; local temperature; superconducting power cables; temperature rise; Bismuth compounds; Heat engines; Heat transfer; High temperature superconductors; Laboratories; Mechanical engineering; Resistance heating; Superconductivity; Thermal conductivity; USA Councils;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
