DocumentCode :
112086
Title :
Temperature and Pressure Simulation of a High-Temperature Superconducting Cable Cooled by Subcooled mbox{LN}_2
Author :
Sato, Yusuke ; Agatsuma, Koh ; Xudong Wang ; Ishiyama, Atsushi
Author_Institution :
Dept. of Electr. Eng. & Biosci., Waseda Univ., Tokyo, Japan
Volume :
25
Issue :
3
fYear :
2015
fDate :
Jun-15
Firstpage :
1
Lastpage :
5
Abstract :
A computer simulation has been developed to estimate the transient temperature and pressure distributions in a high-temperature superconducting (HTS) power cable cooled by a forced flow of subcooled LN2. This simulation is critical for assessing the effects of short-circuit accidents in practical HTS power cables. When a fault occurs, an excessive current of 31.5 kA may flow in a cable for 2 s, and it is important to understand the temperature and pressure profiles in a cable cooled by the forced flow of LN2 when these faults occur until the disturbance flows out from a cable. The temperature profile of the LN2 coolant and the cable cores was analyzed by solving heat conduction and heat transfer equations using the finite-difference method. The Cryodata GASPAK software package was used to estimate the fluid properties. The simulation results show a fairly good agreement with the experimental results. By employing a new model of the induction refrigeration system and the circulation pump, a small discrepancy is resolved in pressures between simulation and experiment. The analysis results show that the pressure in the cable significantly changes depending on the initial gas volumes in the terminals and the volume of the LN2 gas that evaporates from the copper former in the cable.
Keywords :
fault currents; heat conduction; power cables; superconducting cables; Cryodata GASPAK software package; HTS power cable; circulation pump; copper former; disturbance flows; fault current; finite-difference method; heat conduction; heat transfer equations; high-temperature superconducting power cable; induction refrigeration system; initial gas volumes; pressure simulation; temperature profile; temperature simulation; Copper; Fault currents; Heating; High-temperature superconductors; Mathematical model; Power cables; Superconducting cables; Fault currents; High-temperature superconductors; fault currents; heat transfer; heat-conduction equations; high-temperature superconductors; power cables; subcooled $mbox{LN}_{2}$; subcooled LN2;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2014.2387119
Filename :
7000527
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