Title :
Thermal-Electric Simulations of Coated Conductors With a Variable Conductivity of the Buffer Layer
Author :
Henning, Alexander ; Kurrat, Michael
Author_Institution :
Tech. Univ. Braunschweig, Braunschweig
fDate :
6/1/2007 12:00:00 AM
Abstract :
This work presents the results of thermal-electric simulations of coated conductors with systematic variations of the buffer layers electrical conductivity. As boundary conditions liquid nitrogen (LN2) cooling and an overcritical current density are used. For the simulations the commercially available 3D finite element program ANSYS, which was enhanced with a superconducting element, is used. The simulations are carried out with a virtual buffer layer, for the purpose of material selection, under the aspect of use for electrical power applications. The results help to clarify the influence of the conductivity of the buffer layer on the thermal-electric behavior of a high temperature superconductor. In addition the equations used to program the HTS element are described.
Keywords :
buffer layers; critical current density (superconductivity); fault current limiters; finite element analysis; high-temperature superconductors; superconducting devices; thermoelectricity; 3D finite element program ANSYS; buffer layers; coated conductors; electrical conductivity; high temperature superconductor; liquid nitrogen cooling; overcritical current density; superconducting fault current limiters; thermal-electric simulations; Boundary conditions; Buffer layers; Conductors; Cooling; Current density; Finite element methods; High temperature superconductors; Nitrogen; Superconducting epitaxial layers; Thermal conductivity; Fault current limiter (FCL); high-temperature-superconductors (HTS); simulation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898178