Development of a Cryogenic Helium-Neon Gas Mixture Cooling System for Use in a Gd-Bulk HTS Synchronous Motor

Temperature Superconductors (HTS) applied to rotating machines require an efficient cooling system. It is necessary to increase the maximum trapped flux density in the bulk HTS magnets and decrease the overall cooling time. In this paper, we added a gaseous helium phase to a condensed-neon closed-cy...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2011-06, Vol.21 (3), p.2213-2216
Main Authors: Felder, B, Miki, M, Zigang Deng, Tsuzuki, K, Shinohara, N, Izumi, M, Hayakawa, H
Format: Article
Language:English
Subjects:
Applied sciences
Closed-cycle thermosyphon
Cooling
Copper
cryogenics
Design. Technologies. Operation analysis. Testing
Electrical engineering. Electrical power engineering
Electrical machines
Electromagnets
Electronics
Exact sciences and technology
Heating
Helium
helium-neon mixture
High temperature superconductors
Integrated circuits
Magnetic heads
Miscellaneous
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Special rotating machines
superconducting rotating machines
Temperature sensors
Various equipment and components
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Temperature Superconductors (HTS) applied to rotating machines require an efficient cooling system. It is necessary to increase the maximum trapped flux density in the bulk HTS magnets and decrease the overall cooling time. In this paper, we added a gaseous helium phase to a condensed-neon closed-cycle thermosyphon. The latent heat of neon-film cooling is combined with helium's high thermal conductivity. Different mixture proportions were evaluated in terms of resistance to variable heat loads. More helium decreased the temperature variation of the evaporator. The mixture was then used to cool down a 30 kW-grade gadolinium-bulk HTS synchronous motor. The eight bulk HTS conductors of the rotor were cooled to 40 K in less than six hours. The application of this thermosyphon is envisioned for larger rotating machines.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2010.2101573