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The theory of an active magnetic regenerative refrigeratorThe adiabatic temperature change with field which 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 is discussed. Practical magnetic refrigerators operate on a regenerative cycle such as the Brayton cycle. This cycle can be executed 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 is 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.
Document ID
19840007283
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Barclay, J. A.
(Los Alamos Scientific Lab. NM, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1983
Publication Information
Publication: NASA. Goddard Space Flight Center Refrig. for for Cryogenic Sensors
Subject Category
Engineering (General)
Accession Number
84N15351
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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