Cryogenic design of termination cryostat for HTS power cable

Author

Yang, H.S. ; Kim, D.L. ; Kim, D.H. ; Jung, W.M. ; Cho, S. ; Ryoo, H.S. ; Cho, J.W.

Author_Institution

Korea Basic Sci. Inst., Taejeon, South Korea

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1750

Lastpage

1753

Abstract

A high temperature superconducting (HTS) power cable system cooled by forced-circulation subcooled liquid nitrogen is under construction in Korea. In the system, the termination cryostat designed for normal capacity of 22.9 kV, 1.26 kA is located at each end. In order to cool the cryostat effectively, we conducted several numerical analyses. It was found that major design factors were position of inlet and outlet for the liquid nitrogen as well as mass flow rate of the liquid nitrogen in the cryostat. It was also found based on the calculation of temperature distributions in the cryostat that the mass flow rate of liquid nitrogen is needed at least 0.2 kg/s. The cryostat was designed to endure the mechanical stress induced by thermal shrinkage from room temperature to liquid nitrogen temperature. The cryostat is being installed in the 30 m length, prototype single phase HTS cable system.

Keywords

cooling; cryostats; high-temperature superconductors; power cables; superconducting cables; temperature distribution; thermal stresses; 1.26 kA; 22.9 kV; 30 m; HTS power cable system cooling; Korea; cryogenic design; design factors; forced-circulation subcooled liquid nitrogen; high temperature superconducting power cable; inlet position; liquid nitrogen temperature; mass flow rate; mechanical stress; numerical analysis; outlet position; room temperature; single phase HTS cable system; temperature distributions; termination cryostat; thermal shrinkage; Cryogenics; Fluid flow; High temperature superconductors; Nitrogen; Numerical analysis; Power cables; Prototypes; Superconducting cables; Temperature distribution; Thermal stresses; Cooling system; HTS cable; termination cryostat;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.831068

Filename

1325145