Investigating thermal hydraulic quenchback in a cable-in-conduit superconductor
Quench propagation of a cable-in-conduit force-cooled superconductor plays a very important role in the protection of a magnet built with such a conductor as in a Superconducting Magnetic Energy Storage (SMES) system. Some thermal analysis showed that the compressional and frictional heating exerted by the expanding hot helium could heat the helium away from the normal zone above the superconductor current sharing temperature. Thus an acceleration of the quench propagation could be realized. This phenomenon was termed thermal hydraulic quenchback (THQ). A setup has been built specifically to investigate this phenomenon. The test sample consists of a 50-m-long NbTi superconducting cable enclosed in a stainless steel conduit. Heaters 0.2 to 8 m long are provided to quench the conductor. This paper reports experimental finding of THQ and its dependence on the initial normal zone length, the conductor current, and the temperature.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- DOD; Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7196466
- Report Number(s):
- CONF-920802-14; ON: DE92040864
- Country of Publication:
- United States
- Language:
- English
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Normal zone propagation and thermal hydraulic quenchback in a cable-in-conduit superconductor
Normal zone propagation and Thermal Hydraulic Quenchback in a cable-in-conduit superconductor
Related Subjects
250100 -- Energy Storage-- Magnetic
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
CABLES
CONDUCTOR DEVICES
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELEMENTS
ENERGY STORAGE
EQUIPMENT
FLUIDS
GASES
HEATERS
HELIUM
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC ENERGY STORAGE
NIOBIUM ALLOYS
NONMETALS
QUENCHING
RARE GASES
STAINLESS STEELS
STEELS
STORAGE
SUPERCONDUCTING CABLES
SUPERCONDUCTING MAGNETIC ENERGY STORAGE
TITANIUM ALLOYS
ZONES