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

Conference · Tue Sep 01 04:00:00 EDT 1992

DOI:https://doi.org/10.1063/1.43571· OSTI ID:10183495

Murphy, R. W. ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (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 field limits if significant loss mechanisms are mitigated.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10183495
• Report Number(s): CONF-920944--3; ON: DE93000448
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250100
36 MATERIALS SCIENCE
360606
665412
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARNOT CYCLE
CRYOGENICS
GADOLINIUM COMPOUNDS
GALLIUM COMPOUNDS
GARNETS
HIGH-TC SUPERCONDUCTORS
MAGNETIC
MAGNETIC PROPERTIES
MAGNETIC REFRIGERATORS
PHYSICAL PROPERTIES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETIC ENERGY STORAGE
THERMODYNAMIC CYCLES
THERMODYNAMIC PROPERTIES