Title :
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
fDate :
5/1/2000 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
