A Study on Stabilities of Field Windings for Superconducting Power Generators

Stabilities and heat flux in liquid helium in a high gravitational field up to 2, 000G at a rotating speed of 3, 600rpm, are studied to establish the fundamental design criterion of field windings of superconducting generators. It is clarified that magnet stability is greatly improved in a rotationa...

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Published inTEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) Vol. 26; no. 6; pp. 502 - 507
Main Authors HIGUCHI, Noboru, ONISHI, Toshitada, KAIHO, Katsuyuki, NOMURA, Harehiko, ISHII, Itaru, TATEISHI, Hiroshi, NATORI, Naotake, SEKINE, Seiji, ARAI, Kazuaki, KIMURA, Yoichi, KUMAGAI, Mikio, AIBA, Toshiyuki
Format Journal Article
LanguageEnglish
Published CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN 1991
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Summary:Stabilities and heat flux in liquid helium in a high gravitational field up to 2, 000G at a rotating speed of 3, 600rpm, are studied to establish the fundamental design criterion of field windings of superconducting generators. It is clarified that magnet stability is greatly improved in a rotational field compared with stationary state, because of the enhancement of natural convection for the cooling of the coils caused by a high gravity. The heat transfer coefficient measured from a copper surface to liquid helium is 0.75×104Wm-2K-1 at about 1, 000G, and it is identical to the calculated value based on the normal zone propagation velocity under the same condition.
ISSN:0389-2441
1880-0408
DOI:10.2221/jcsj.26.502