Rotary magnetic refrigerator for superfluid helium production

Journal Article · Sat Nov 01 04:00:00 EST 1986 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.337716· OSTI ID:5262662

Hakuraku, Y; Ogata, H

A new rotary-magnetic refrigerator designed to obtain superfluid helium temperatures by executing a magnetic Carnot cycle is developed. A rotor containing 12 magnetic refrigerants (gadolinium-gallium-garnet) is immersed in liquid helium at 4.2 K and rotated at constant speed in a steady magnetic field distribution. Performance tests demonstrate that the new rotary refrigerator is capable of obtaining a temperature of 1.48 K. The maximum useful cooling power obtained at 1.8 K is 1.81 W which corresponds to a refrigeration efficiency of 34%.

• Research Organization: Mechanical Engineering Research Laboratory, Hitachi, Ltd., 502 Kandatsu, Tsuchiura, Ibaraki 300, Japan
• OSTI ID: 5262662
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 60:9; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARNOT CYCLE
CRYOGENICS
DESIGN
EFFICIENCY
ELEMENTS
FABRICATION
FLUIDS
GASES
HELIUM
MAGNETIC FIELDS
MAGNETIC REFRIGERATORS
NONMETALS
RARE GASES
REFRIGERATORS
SYNTHESIS
THERMODYNAMIC CYCLES
ULTRALOW TEMPERATURE