Stability against transient disturbances in cable-in-conduit conductors cooled by supercritical helium

Author

Lvovsky, Y.M.

Author_Institution

Babcock & Wilcox Co., Lynchburg, VA, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

584

Lastpage

587

Abstract

The stability of cable-in-conduit superconductor (CICC) is analyzed for transient disturbances applied to a strand. The study is focused on the effects of thermal contact between strands and transient heat transfer in supercritical helium, including thermal expansion to neighboring voids. The process of normal zone growth from strand to strand was numerically modeled using a 2-D approximation. Stability margins were determined for the well cooled and poorly cooled regimes. Interstrand contacts as well as longitudinal helium flow involve more strands and helium voids, thus significantly improving CICC stability. The effect of helium thermal expansion, transient heat conduction and shape of disturbance is discussed.<>

Keywords

approximation theory; cooling; electric conduits; heat conduction; power cables; stability; superconducting cables; thermal analysis; thermal expansion; 2-D approximation; cable-in-conduit superconductor; cooling; multistrand conductor; neighboring voids; normal zone growth; stability; supercritical helium; thermal contact; thermal expansion; transient disturbances; transient heat conduction; transient heat transfer; Conductors; Heat transfer; Helium; Numerical models; Shape; Stability analysis; Superconducting cables; Thermal conductivity; Thermal expansion; Transient analysis;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402618

Filename

402618