Transient response in magnetocaloric regeneration

Author

Shir, Farhad ; Bennett, Lawrence H. ; Torre, Edward Della ; Mavriplis, Catherine ; Shull, Robert D.

Author_Institution

Inst. for Magnetics Res., George Washington Univ., Ashburn, VA, USA

Volume

41

Issue

6

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

2129

Lastpage

2133

Abstract

We report on the first experimental demonstration of the details of the transient response in the four sequential processes of active magnetic regenerative refrigeration: magnetization, warm blow, demagnetization, and cold blow. The experimental results display the details of the gradual temperature divergence due to regeneration. The temperature change of the stationary solid bed is due to the magnetocaloric effect in a periodic field. The theory for the active magnetic regenerative refrigeration is applied to the transient processes in magnetocaloric regeneration. A time and spatial dependent model of temperature profile of the magnetization and demagnetization with thermal wave regenerative processes is developed.

Keywords

demagnetisation; magnetisation; magnetocaloric effects; refrigeration; transient response; active magnetic regenerative refrigeration; cold blow; demagnetization; gradual temperature divergence; magnetization; magnetocaloric regeneration; temperature profile model; thermal wave regenerative processes; transient magnetic regenerative process; transient response; warm blow; Demagnetization; Heat transfer; Magnetic materials; Magnetization; Refrigerants; Refrigeration; Solids; Temperature; Transient response; USA Councils; Magnetic refrigeration; magnetocaloric effect; transient magnetic regenerative process;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.848786

Filename

1438453