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Magnetic refrigeration system with unequal blows

United States Patent

9,927,155
March 27, 2018
View the Complete Patent at the US Patent & Trademark Office
A magnetic refrigeration apparatus includes beds of magnetocaloric material with a hot side and a cold side. The apparatus also includes a magnet to apply a magnetic field to the beds, a heat transfer fluid, a pump to circulate the heat transfer fluid, a hot side heat exchanger, a cold side heat exchanger, and a controller to control the flow of heat transfer fluid from the cold side to the hot side of the beds when the magnetic field on the beds is high at an average flow rate of .PHI.H for a duration .DELTA.tH. The controller also controls the flow of heat transfer fluid from the hot side of the beds to the cold side of the beds when the magnetic field on the beds is low at an average flow rate of .PHI.C for a duration .DELTA.tC, where .DELTA.tC>.DELTA.tH and .PHI.C<.PHI.H.
Boeder; Andre Michael (Monona, WI), Chell; Jeremy Jonathan (Madison, WI), Jacobs; Steve Alan (Madison, WI), Leonard; John Paul (Cambridge, WI), Auringer; Jon Jay (Poynette, WI), Zimm; Carl Bruno (Madison, WI), Mueller; Bryant Wayne (Madison, WI)
ASTRONAUTICS CORPORATION OF AMERICA (Milwaukee, WI)
14/ 567,835
20160076797
December 11, 2014
FEDERAL FUNDING STATEMENT This invention was made with Government support under DE-AR0000128 awarded by U.S. Department of Energy. The U.S. Government has certain rights in this invention.