The operational stability of a composite film/tape type superconductor is studied by considering the impact of a thermal disturbance distributed along a line. Issues addressed are failure of intrinsic stability, current sharing, joule heating, and recovery of superconductivity. Mathematical models have been developed to describe the phenomena. Conjugate heat diffusion problem for the superconductor and the stabilizer have been solved using finite-difference method. The effects of current density and stabilizer dimension have been investigated, resulting in identification of three characteristic regions with regard to the operational stability of the superconductor. The composite superconductor was found to be intrinsically stable, recoverably unstable, or irrecoverably unstable. Numerical data of instability parameter, convective cooling rate, joule heating rate, and current sharing are presented for a high-Tc YBCO superconductor.
|Number of pages
|Proceedings of the Intersociety Energy Conversion Engineering Conference
|Published - 1991
|Proceedings of the 26th Intersociety Energy Conversion Engineering Conference - IECEC '91 - Boston, MA, USA
Duration: Aug 4 1991 → Aug 9 1991