magnetic refrigerator

magnetic refrigerator

[mag′ned·ik ri′frij·ə‚rād·ər]
(cryogenics)
A device for keeping substances cooled to about 0.2 K, in which a working substance consisting of a paramagnetic salt undergoes a cycle of processes which approximates a Carnot cycle between a high-temperature reservoir consisting of a liquid-helium bath at 1.2 K and a low-temperature reservoir consisting of the substance to be cooled, and isentropic cooling of the working substance is accomplished by demagnetization.
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The report said that the GE labs estimated a magnetic refrigerator would be 20 to 30 percent more efficient than its compressor-using cousins, and would not require chemical refrigerants, which would result in energy savings and make the process of recycling old machines much simpler.
A magnetic refrigerator makes use of the magnetocaloric effect.
it's impossible to spread yourself that thin without reinventing the magnetic refrigerator calendar.
Brown (1976) first constructed a regenerative magnetic refrigerator and showed that the use of a regenerative configuration can provide a no-load temperature span that is much greater than the adiabatic temperature change of the magnetocaloric material that is used to construct the regenerator.
Department of Energy's Ames (Iowa) Laboratory, researchers have successfully demonstrated the world's first room-temperature, permanent-magnet, magnetic refrigerator.
Numerous patents have been assigned to the design and assembly of magnetic refrigerator seals.
The pack includes a digital camera with video capabilities1, a card holder for collectible DK trading cards, a magnetic refrigerator picture frame, two temporary tattoos and entry forms for the "Travel Should Spark Discovery" sweepstakes and the "Click Into Summer" photo promotion.
have created a prototype magnetic refrigerator that operates at room temperature (SN: 1/5/02, p.
Department of Energy's Ames Laboratory have constructed and tested a fully instrumented magnetic refrigerator operating in the near-room temperature region typical of air conditioners and refrigerators for food storage.
Ames Develops World's First Magnetic Refrigerator III-7
Zimm estimates that it will take at least 5 years for an industrial magnetic refrigerator to become available.
To increase the operating temperature of a magnetic refrigerator," he says, "we need new materials.

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