Abstract: A regenerator for a magnetic heat exchanger is provided. The regenerator comprises a housing having a chamber, an inlet and outlet for a working medium, and a chamber volume V. At least one magnetocalorically active component is arranged in the chamber between the inlet and the outlet and has at least one inner flow channel with a hydraulic diameter dhyd. The volume of the chamber not occupied by the magnetocalorically active component provides at least one bypass flow channel, both the inlet and the outlet being reached from the at least one bypass flow channel, and this bypass flow channel having a hydraulic diameter D, where D>dhyd. The at least one inner flow channel of the magnetocalorically active component is in flow communication with the bypass flow channel. The magnetocalorically active component and the at least one bypass flow channel are arranged parallel to one another.

Abstract: In an embodiment, a method of fabricating a working component for magnetic heat exchange comprises arranging at least two articles comprising a magnetocalorically active phase and an elongated form with a long axis having a length 1 and a shortest axis having a length s, wherein 1?1.5 s, such that the shortest axes of the at least two articles are substantially parallel to one another and securing the at least two articles in a position within the working component such that the shortest axes of the at least two articles are substantially parallel to one another within the working component.

Abstract: In an embodiment, a method of fabricating a working component for magnetic heat exchange comprises arranging at least two articles comprising a magnetocalorically active phase and an elongated form with a long axis having a length 1 and a shortest axis having a length s, wherein 1?1.5 s, such that the shortest axes of the at least two articles are substantially parallel to one another and securing the at least two articles in a position within the working component such that the shortest axes of the at least two articles are substantially parallel to one another within the working component.

Abstract: In an embodiment, a method of fabricating a working component for magnetic heat exchange comprises arranging at least two articles comprising a magnetocalorically active phase and an elongated form with a long axis having a length l and a shortest axis having a length s, wherein l?1.5 s, such that the shortest axes of the at least two articles are substantially parallel to one another and securing the at least two articles in a position within the working component such that the shortest axes of the at least two articles are substantially parallel to one another within the working component.

Abstract: A method of fabricating an article for magnetic heat exchange, is provided which comprises plastically deforming a composite body comprising a binder having a glass transition temperature TG and a powder comprising a magnetocalorically active phase or elements in amounts suitable to produce a magnetocalorically active phase such that at least one dimension of the composite body' changes in length by at least 10%.

Abstract: A method of fabricating an article for magnetic heat exchange, is provided which comprises plastically deforming a composite body comprising a binder having a glass transition temperature TG and a powder comprising a magnetocalorically active phase or elements in amounts suitable to produce a magnetocalorically active phase such that at least one dimension of the composite body’ changes in length by at least 10%.

Abstract: In an embodiment, a method of fabricating a working component for magnetic heat exchange comprises arranging at least two articles comprising a magnetocalorically active phase and an elongated form with a long axis having a length l and a shortest axis having a length s, wherein l?1.5 s, such that the shortest axes of the at least two articles are substantially parallel to one another and securing the at least two articles in a position within the working component such that the shortest axes of the at least two articles are substantially parallel to one another within the working component.

Abstract: A method of fabricating an article for magnetic heat exchange is provided. The method comprises mixing a binder comprising a poly (alkylene carbonate) and powder comprising a magnetocalorically active phase with a NaZn13-type crystal structure to produce a brown body or powder comprising elements in amounts suitable to produce a magnetocalorically active phase with a NaZn13-type crystal structure, removing the binder from the brown body to produce a green body, and sintering the green body to produce an article for magnetic heat exchange.