Evaluation Of AC Loss And Temperature Distribution In High Temperature Superconducting Tape Using COMSOL Multiphysics
High temperature superconductors (HTS) are promising candidates for electrical power applications. However, the superconductors exhibits energy loss known as AC loss when exposed to time varying external magnetic field and/or transport current. In this paper, AC loss in an elliptical Ag sheathed Bi2223 (HTS) tape is calculated using the time dependent PDE mode of COMSOL Multiphysics. The HTS tape is subjected to the externally applied time varying magnetic field and transport current. The effect of frequency and amplitude of applied AC fields and transport currents are observed using the post-processing unit of COMSOL Multiphysics. Using the calculated AC losses as the heat sources in physics settings, the temperature distribution inside the superconducting tape is evaluated. This is done with the help of the Heat Transfer Module of COMSOL Multiphysics. Proper thermal boundary conditions and anisotropic thermal conductivity of the HTS tape are applied in boundary and sub-domain settings respectively. Lastly, the temperature rise at a certain hot-spot inside the Bi2223/Ag tape is investigated.
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