Rotary magnetic refrigerator for superfluid helium production

Journal Article · Sat Nov 01 00:00:00 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), Vol. 60:9
• Country of Publication: United States
• Language: English

Related Subjects

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