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 in | TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) Vol. 26; no. 6; pp. 502 - 507 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN
1991
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Online Access | Get full text |
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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. |
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ISSN: | 0389-2441 1880-0408 |
DOI: | 10.2221/jcsj.26.502 |