Theory of an active magnetic regenerative refrigerator

Conference · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6224820

Barclay, J A

The adiabatic temperature change with field is limited to about 2 K/Tesla for ferromagnets near their Curie temperatures by the change of magnetization with temperature and the lattice heat capacity. Hence, practical magnetic refrigerators operate on a regenerative cycle such as the Brayton cycle. One way to execute this cycle is through the use of an active magnetic regenerator, i.e. a regenerator composed of magnetic material that is cycled in an out of a magnetic field with appropriate fluid flows. The theory of these devices can be predicted by solving the partial differential equations that describe fluid and the magnetic solid. The active magnetic regenerator is described along with the method of calculation. Temperature profiles for a normal regenerator and a magnetic regenerative refrigerator are shown.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6224820
• Report Number(s): LA-UR-83-1251; CONF-821237-1; ON: DE83011184
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURIE POINT
DIFFERENTIAL EQUATIONS
ENTROPY
EQUATIONS
FERROMAGNETIC MATERIALS
MAGNETIC MATERIALS
MAGNETIC REFRIGERATORS
MATERIALS
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
REFRIGERATORS
REGENERATORS
TEMPERATURE DISTRIBUTION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE