Numerical simulation of thermal properties of a cryocooler-cooled Bi2223 superconducting pulsed coil in AC operation

H. Miyazaki, S. Chigusa, I. Tanaka, Masataka Iwakuma, K. Funaki, H. Hayashi, A. Tomioka

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

We fabricated a cryocooler-cooled Bi2223 superconducting pulsed coil and experimentally studied the thermal run-away in dc or ac operation. We carried out numerical simulation of thermal properties of the coil in order to explain the thermal runaway of the coil. Firstly, we analyzed the total heat generation of flux-flow losses and ac losses inside the winding from the experimental results of the external field losses and the E - J characteristics for the Bi2223 strands. Secondly, we numerically simulated the thermal properties by using a 2-dimensional heat conduction equation with axial symmetry. The numerical simulation shows the relation between the initiation of thermal runaway and the temperature distribution with highly concentrated heat source in the winding. We have a semi-quantitative agreement between the numerical results and the experimental ones for the condition of the thermal runaway.

元の言語英語
記事番号1643200
ページ(範囲)1749-1752
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
16
発行部数2
DOI
出版物ステータス出版済み - 6 1 2006

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alternating current
coils
Thermodynamic properties
thermodynamic properties
Computer simulation
simulation
heat generation
heat sources
conductive heat transfer
strands
temperature distribution
Heat generation
Heat conduction
symmetry
Enthalpy
Temperature distribution
Hot Temperature
Fluxes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

これを引用

Numerical simulation of thermal properties of a cryocooler-cooled Bi2223 superconducting pulsed coil in AC operation. / Miyazaki, H.; Chigusa, S.; Tanaka, I.; Iwakuma, Masataka; Funaki, K.; Hayashi, H.; Tomioka, A.

:: IEEE Transactions on Applied Superconductivity, 巻 16, 番号 2, 1643200, 01.06.2006, p. 1749-1752.

研究成果: ジャーナルへの寄稿記事

Miyazaki, H. ; Chigusa, S. ; Tanaka, I. ; Iwakuma, Masataka ; Funaki, K. ; Hayashi, H. ; Tomioka, A. / Numerical simulation of thermal properties of a cryocooler-cooled Bi2223 superconducting pulsed coil in AC operation. :: IEEE Transactions on Applied Superconductivity. 2006 ; 巻 16, 番号 2. pp. 1749-1752.
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AU - Miyazaki, H.

AU - Chigusa, S.

AU - Tanaka, I.

AU - Iwakuma, Masataka

AU - Funaki, K.

AU - Hayashi, H.

AU - Tomioka, A.

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AB - We fabricated a cryocooler-cooled Bi2223 superconducting pulsed coil and experimentally studied the thermal run-away in dc or ac operation. We carried out numerical simulation of thermal properties of the coil in order to explain the thermal runaway of the coil. Firstly, we analyzed the total heat generation of flux-flow losses and ac losses inside the winding from the experimental results of the external field losses and the E - J characteristics for the Bi2223 strands. Secondly, we numerically simulated the thermal properties by using a 2-dimensional heat conduction equation with axial symmetry. The numerical simulation shows the relation between the initiation of thermal runaway and the temperature distribution with highly concentrated heat source in the winding. We have a semi-quantitative agreement between the numerical results and the experimental ones for the condition of the thermal runaway.

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