Optimal design of a Bi-2223/Ag coil for superconducting magnetic energy storage at different operating temperatures

Kohei Higashikawa, Taketsune Nakamura, Hiroshi Okamoto

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We carried out optimal design of a Bi-2223/Ag toroidal coil for a superconducting magnetic energy storage system. The objective was to minimize the total length of Bi-2223/Ag tape at fixed conditions of operating temperature, stored energy and upper limit of the loss. The energy loss was calculated by means of the 3D finite element method (FEM) with the use of J-E expressions, which can quantitatively estimate the experimental data obtained from the tape in wide ranges of temperature (20-77 K), external magnetic field (0.02-3 T) and its applied direction (arbitrary). On the other hand, the optimal solution was obtained by a genetic algorithm (GA), which was a particularly effective optimization method when the objective function had a number of local minimum points. We performed such optimal design under various constraint conditions, and found that the optimal configuration of the coil drastically changed as its operating temperature varied.

Original languageEnglish
Pages (from-to)1445-1453
Number of pages9
JournalSuperconductor Science and Technology
Volume18
Issue number11
DOIs
Publication statusPublished - Nov 1 2005

Fingerprint

magnetic energy storage
operating temperature
Energy storage
tapes
coils
Tapes
genetic algorithms
finite element method
energy dissipation
Temperature
optimization
Energy dissipation
estimates
configurations
Genetic algorithms
magnetic fields
Magnetic fields
Finite element method
temperature
Optimal design

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Optimal design of a Bi-2223/Ag coil for superconducting magnetic energy storage at different operating temperatures. / Higashikawa, Kohei; Nakamura, Taketsune; Okamoto, Hiroshi.

In: Superconductor Science and Technology, Vol. 18, No. 11, 01.11.2005, p. 1445-1453.

Research output: Contribution to journalArticle

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