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Boiling heat transfer to a liquid nitrogen pool from Ag sheathed BiPb2223 tapes carrying over-current

Boiling heat transfer to a liquid nitrogen pool from Ag sheathed BiPb2223 tapes carrying over-current
Boiling heat transfer to a liquid nitrogen pool from Ag sheathed BiPb2223 tapes carrying over-current
Measurements were carried out on boiling heat transfer to a liquid nitrogen pool due to self-heating of Ag sheathed BiPb2223 tapes with increasing over-currents up to 300 A, focusing on its difference from increasing heat flux in conventional heated surfaces. Large spontaneous oscillations of the surface temperature were observed and attributed to the interplay between the activation/deactivation of nucleate boiling and the highly nonlinear heat generation of the superconductor as a function of temperature. Two distinct steady states of 8 and 3 K superheating were also found for samples carrying 300 A, depending on the current cycle history.
0953-2048
276-279
Bailey, W.
cb27baca-7b26-40c4-adc0-02989df02ea8
Young, E.A.
d3a881b0-a564-41f5-9843-34ae86da360f
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Bailey, W.
cb27baca-7b26-40c4-adc0-02989df02ea8
Young, E.A.
d3a881b0-a564-41f5-9843-34ae86da360f
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234

Bailey, W., Young, E.A., Yang, Y. and Beduz, C. (2006) Boiling heat transfer to a liquid nitrogen pool from Ag sheathed BiPb2223 tapes carrying over-current. Superconductor Science and Technology, 19 (4), 276-279.

Record type: Article

Abstract

Measurements were carried out on boiling heat transfer to a liquid nitrogen pool due to self-heating of Ag sheathed BiPb2223 tapes with increasing over-currents up to 300 A, focusing on its difference from increasing heat flux in conventional heated surfaces. Large spontaneous oscillations of the surface temperature were observed and attributed to the interplay between the activation/deactivation of nucleate boiling and the highly nonlinear heat generation of the superconductor as a function of temperature. Two distinct steady states of 8 and 3 K superheating were also found for samples carrying 300 A, depending on the current cycle history.

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More information

Published date: 2006
Additional Information: Rare data on the dissipative voltage-current properties of superconductors when cooled by single phase and two phase cryogen. Pool boiling heat transfer in cryogens is very relevant to current interest in the development of Superconducting Fault Current Limiters.

Identifiers

Local EPrints ID: 23890
URI: https://eprints.soton.ac.uk/id/eprint/23890
ISSN: 0953-2048
PURE UUID: 89876906-0a09-408e-aca9-b28a3ae10c45
ORCID for Y. Yang: ORCID iD orcid.org/0000-0002-3874-6735

Catalogue record

Date deposited: 16 Mar 2006
Last modified: 06 Jun 2018 13:08

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