Experimental Investigation of a Magnetic Refrigerator Based on Magnetically Active Regeneration.
Final rept. May 84-May 86,
MASSACHUSETTS INST OF TECH CAMBRIDGE CRYOGENIC ENGINEERING LAB
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The concept of magnetically active regeneration is explored in a prototype magnetic refrigerator which has produced a refrigeration of 0.40 W at 3.79 K while rejecting 3.0 W to a 5.51 K sink. The prototype refrigerator consists of a Gadolinium-Gallium-GarnetGd3Ga5012regenerator core excited by an AC superconducting solenoid. A reversing flow of 3 atm supercritical helium carries the heat of magnetization to the hot reservoir and refrigerates the cold reservoir with the cooling of demagnetization. Keywords Cryogenics Adiabatic Demagnetization.