Test results of superconducting AC magnets for magnetic refrigeration experiment

Technical Report · Thu Sep 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10182532· OSTI ID:10182532

Lue, J W; Luton, J N; Schwenterly, S W; Wilson, C T

Magnetic refrigeration can be achieved by cycling the magnetic field while leaving the magnetic material and the magnet stationary to avoid the large electromagnetic force problem. Two superconducting magnets were used to test this approach. First, we reconfigurated a force-cooled cable-in-conduit magnet to operate with liquid rather than supercritical helium. Limited by the available power supply voltage, the fastest charging rate achieved was 10 s to 5 T. A second low loss magnet was acquired for operation to 7 T with a 6-s duty cycle. This is a bath-cooled magnet with potted sub-coils. The conductor is a 20-strand Rutherford-type cable with Ebanol insulation on each strand. This magnet quenched prematurely at 6.4 T. It was charge rate sensitive and the fastest charging rate achieved was 10 s to 5.8 T.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10182532
• Report Number(s): CONF-930926--40; ON: DE94018695
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303
665412
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EQUIPMENT AND PROCESSES
EXPERIMENTAL DATA
HEAT PUMPS
MAGNETIC ENERGY STORAGE
MAGNETIC REFRIGERATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
TECHNOLOGY ASSESSMENT