Magnetic refrigeration cycle analysis using selected thermodynamic property characterizations for gadolinium gallium garnet

Conference · Mon Feb 10 04:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5630078

Murphy, R W ^[1]

---

1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

Magneto-thermodynamic property characterizations were selected, adapted, and compared to material property data for gadolinium gallium garnet in the temperature range 4--40 K and magnetic field range 0--6 T. The most appropriate formulations were incorporated into a model in which methods similar to those previously developed for other materials and temperature ranges were used to make limitation and relative performance assessments of Carnot, ideal regenerative, and pseudo-constant field regenerative cycles. Analysis showed that although Carnot cycle limitations on available temperature lift for gadolinium gallium garnet are not as severe as those for materials previously examined, substantial improvements in cooling capacity/temperature lift combinations can be achieved using regenerative cycles within specified fields limits if significant loss mechanisms are mitigated.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5630078
• Report Number(s): CONF-920944--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 273:1
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARNOT CYCLE
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENTROPY
EQUIPMENT
GADOLINIUM COMPOUNDS
GALLIUM COMPOUNDS
GARNETS
MAGNETIC REFRIGERATORS
MAGNETIZATION
MAGNETS
MINERALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRIGERATORS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SPECIFIC HEAT
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
THERMODYNAMIC CYCLES
THERMODYNAMIC PROPERTIES