A new technique for the analysis of torque tube heat exchangers of superconducting generators

Journal article

Authors / Editors

Sahoo, Pradeep

Research Areas

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Publication Details

Author list: Sahoo PK, Sarangi S

Publisher: Elsevier

Place: OXFORD

Publication year: 1996

Journal: Cryogenics (0011-2275)

Journal acronym: CRYOGENICS

Volume number: 36

Issue number: 5

Start page: 343

End page: 349

Number of pages: 7

ISSN: 0011-2275

Languages: English-Great Britain (EN-GB)

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Abstract

The torque tubes of a superconducting generator belong to a unique class of heat exchangers where a single fluid stream (boil off helium vapour) exchanges heat with a metallic wall conducting heat from the ambient to the cold (liquid helium) space. The rate of heat leak to the cold space is the chief indicator of the performance of the exchanger. This rate of heat inleak has been found to be a function of two dimensionless parameters: a generalized cooling parameter Lambda* and a temperature range parameter Psi. A generalized design chart is presented which expresses the dimensionless heat flow rate Q(c) in terms of the parameters Lambda and Psi. This chart will be useful for the design of torque tubes and vapour-cooled support members in cryogenic systems.

Keywords

field winding, superconducting generator, thermal modelling, torque tubes

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