Rotating Carnot-cycle magnetic refrigerators for use near 2 K

Journal Article · Wed Mar 01 04:00:00 EST 1978 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.325010· OSTI ID:5045346

Steyert, W A

The application or removal of a magnetic field of order 5 T to some Gd compounds at low temperatures results in 10-20 K adiabatic temperature changes or the isothermal expulsion or absorption of heat. In particular, the heat absorbed by 1 liter of appropriate magnetic material at 2 K is several hundred J. A rotating device is decribed which will allow cycle times of much less than 1 sec, resulting in approximately 1-kW refrigeration capacity for each liter of paramagnetic Gd compound. This heat could be expelled with better than 80% of Carnot efficiency into a helium refrigerator operating at 10-14 K.

• Research Organization: University of California, Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5045346
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADIABATIC DEMAGNETIZATION
APPLIANCES
CARNOT CYCLE
CRYOGENIC FLUIDS
CRYOGENICS
DESIGN
EFFICIENCY
ELECTRIC APPLIANCES
ELEMENTS
ENERGY TRANSFER
ENTROPY
FLUIDS
GADOLINIUM COMPOUNDS
GADOLINIUM PHOSPHATES
GADOLINIUM SULFATES
GAS APPLIANCES
HEAT EXCHANGERS
HEAT TRANSFER
HELIUM
MAGNETIC REFRIGERATORS
MAGNETO-THERMAL EFFECTS
NONMETALS
OXYGEN COMPOUNDS
PERFORMANCE
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE GASES
REFRIGERATING MACHINERY
REFRIGERATORS
SULFATES
SULFUR COMPOUNDS
SUPERFLUIDITY
THERMAL CONDUCTION
THERMODYNAMIC CYCLES
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE