Title :
Cryostat vacuum thermal considerations for HTS power transmission cable systems
Author :
Demko, A. ; Lue, J.W. ; Gouge, M.J. ; Lindsay, D. ; Roden, M. ; Willen, D. ; Däumling, M. ; Fesmire, J.E. ; Augustynowicz, S.D.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
The use of high-temperature superconducting (HTS) materials for power transmission cable applications is being realized in several utility demonstration projects. Both room-temperature and cold-dielectric cable systems rely on a vacuum cryostat to keep the ambient thermal loads at a minimum. For long-term installations, operating 30 years or longer, the thermal-insulating vacuum pressure may increase in sections of a long length installation. Even if only a small section of the total length of the HTS cable system is affected, localized heating of the cable may reduce the performance of the HTS cable system. A study is presented of the effects of degraded vacuum levels on the operation of HTS cables for different cryogenic thermal insulation systems.
Keywords :
cryostats; high-temperature superconductors; superconducting cables; thermal insulation; cold-dielectric cable; cryogenic thermal insulation system; high temperature superconductor; power transmission cable; vacuum cryostat; warm-dielectric cable; Cryogenics; Heating; High temperature superconductors; Power transmission; Superconducting cables; Superconducting materials; Superconducting transmission lines; Thermal degradation; Thermal loading; Vacuum systems;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812956
