CONCEPTUAL DESIGN OF 21 kJ SUPERCONDUCTING MAGNETIC ENERGY STORAGE DEVICE
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
In this paper, a modular toroidal coil system is analysed for the development of a superconducting energy storage device (SMES) using FEM. The objective of this preliminary design is to determine the approximate dimensions, quantity of superconducting material, mechanical stresses and maximum magnetic fields around the superconductor, in order to optimize the configuration of SMES concerning the manufacturing cost. Three distinct variants were proposed for the shape coil: solenoid, multiple solenoids and toroid, pointing out there’s advantages and disadvantages. Numerical analyse considers a modular toroid supporting the planar 2D modelling. The FEM implementation uses an equivalent rectangular cross section, conserving the inductance of the system. The modelling of perfect diamagnetism was made considering the values of relative permeability of superconductor close to zero. For automation of the numerical computation, a command file has been created using LUA scripting language. The numerical results indicate a maximum value of magnetic flux density localized in the frontal areas of the each solenoid coil and a low stray field level outside of modular toroidal coil. The 2D FEM modell used is useful for the identification of the critical values regarding the magnetic fields near the superconducting wire and the mechanical stresses.
Authors and Affiliations
Florian ŞTEFĂNESCU, Alin-Iulian DOLAN
Keywords
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