Room-temperature magnetic refrigerator using permanent magnets

Author

Bohigas, X. ; Molins, E. ; Roig, A. ; Tejada, J. ; Zhang, X.X.

Author_Institution

Dept. de Fisica i Enginyeria Nucl., Univ. Politecnica de Catalunya, Barcelona, Spain

Volume

36

Issue

3

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

538

Lastpage

544

Abstract

A magnetic refrigerator device based on adiabatic magnetic refrigeration is described. The magnetic material is cyclically magnetized and demagnetized by permanent magnets in an adiabatic process. A temperature difference of 1.6 K between the hot and cold regions was obtained under a low magnetic field (0.3 T). Gadolinium was the magnetic material used in experiments at room temperature. The range of working temperatures is between 70 and 300 K for a variety of active magnetic materials. The optimized experimental setup increased the device efficiency by achieving a temperature difference between hot and cold sources up to 5 K

Keywords

gadolinium; magnetic cooling; permanent magnets; 0.3 T; 70 to 300 K; Gd; active magnetic material; adiabatic magnetic refrigeration; gadolinium; permanent magnet; room temperature magnetic refrigerator; Cooling; Demagnetization; Magnetic devices; Magnetic fields; Magnetic materials; Permanent magnets; Refrigerants; Refrigeration; Superconducting magnets; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.846216

Filename

846216