A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. A plurality of thermal stages is stacked along an axial direction between a cold side and a hot side. A hot side heat exchanger is positioned at the hot side of the plurality of thermal stages. The hot side heat exchanger includes a plurality of pins or plates for rejecting heat to ambient air about the hot side heat exchanger. A cold side heat exchanger is positioned at the cold side of the plurality of thermal stages. A heat transfer fluid is flowable through the cold side heat exchanger. The cold side heat exchanger is configured such that the heat transfer fluid rejects heat to the cold side of the plurality of thermal stages when the heat transfer fluid flows through the cold side heat exchanger.

A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. A plurality of thermal stages is stacked along an axial direction between a cold side and a hot side. A heat exchanger includes a cylindrical stator positioned at and in thermal communication with the cold side or the hot side of the plurality of thermal stages. A cylindrical rotor is spaced from the cylindrical stator by a cylindrical gap. The cylindrical rotor is configured to rotate relative to the cylindrical stator about a rotation axis. A shearing liquid zone is defined between a surface of the cylindrical stator that faces the cylindrical gap and a surface of the cylindrical rotor that faces the cylindrical gap when the cylindrical gap is filled with a liquid.

There are provided a magnetic work body capable of being easily laminated and a magnetic heat pump device using the same. A magnetic work body is provided with a plate-shaped body 31 formed of a magnetic work substance, in which a gap forming deformation portion 32 serving as a gap adjusting member in laminating is formed in the plate-shaped body.

Provided is a magnetic heat pump apparatus which solves a problem caused by the use of a rotary valve and which has improved efficiency. The magnetic heat pump apparatus includes magnetic working bodies 11A and 11B, which are provided with magnetic working substances 13 having a magnetocaloric effect and in which a heat transfer medium is circulated, permanent magnets 6 which change the size of a magnetic field to be applied to the magnetic working substances, displacers 8 which cause the heat transfer medium to reciprocate between a high-temperature end 14 and a low-temperature end 16 of each of the magnetic working bodies, and external heat transfer medium circulation circuits 27 and 28 which have external heat exchangers 19 and 22 and which circulate a second heat transfer medium. The external heat transfer medium circulation circuits cause heat exchange to be carried out between the second heat transfer medium and the heat transfer medium of each of the magnetic working bodies, and then circulate the second heat transfer medium which has been subjected to the heat exchange to external heat exchangers.

A magnetic refrigeration system includes a plurality of heat transporters, a magnetic field application unit, and a drive mechanism. Each heat transporter is switched between a heat generating and heat absorbing states in response to magnetic field application and cancellation of the magnetic field application. The heat transporters are arranged between low and high temperature side heat exchangers. The magnetic field application unit applies a magnetic field to the heat transporters so that a heat transporter to which a magnetic field is applied and a heat transporter to which a magnetic field is not applied are alternately arranged. The drive mechanism periodically moves at least the plurality of heat transporters so that a heat transporter to which the magnetic field is applied is periodically switched and so that a state of thermal contact is periodically switched. An end portion of at least one heat transporter is a heat transfer accelerator.

The present invention provides a working fluid re-liquefaction system driven by recovered exhaust gas energy of a prime mover with heat rejection via a magneto-caloric liquefier to atmosphere for distributed electric generation and motor vehicle application.

A magnetocaloric thermal generator having a primary circuit fluidically connecting first and second stages of magnetocaloric elements using a heat transfer primary fluid flowing alternately back and forth. The stages being subjected to variable magnetic field of a magnetic system. The primary system includes a cold side and a hot side to which the magnetocaloric elements of the stages are fluidically connected. At least the cold side of the primary circuit has an outlet point connected to another point of the primary circuit, referred to as the injection point, on the hot side by a bypass pipe allowing the primary fluid to be displaced only from the outlet point towards the injection point. The magnetocaloric thermal generator is used in a method for cooling the secondary fluid.

A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. A plurality of thermal stages is stacked along an axial direction between a cold side and a hot side. A plurality of supports is positioned within the plurality of thermal stages. The plurality of supports is distributed along the axial direction. The plurality of supports contacts the magneto-caloric cylinder such that the plurality of supports limits deflection of the magneto-caloric cylinder along a radial direction. The plurality of thermal stages and the magneto-caloric cylinder are configured for relative rotation between the plurality of thermal stages and the magneto-caloric cylinder.

A magneto-caloric thermal diode assembly includes a first magneto-caloric cylinder and a second magneto-caloric cylinder. The second magneto-caloric cylinder and a second plurality of thermal stages are nested concentrically within the first magneto-caloric cylinder and a first plurality of thermal stages. A plurality of magnets is distributed along a circumferential direction within a non-magnetic ring in each thermal stage of the first and second pluralities of thermal stages. Each thermal stage of the first and second pluralities of thermal stages has a first half and a second half. A polarity of the magnets of the plurality of magnets within the first half is oriented opposite a polarity of the magnets of the plurality of magnets within the second half along the radial direction in each thermal stage of the first and second pluralities of thermal stages.

A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder. A plurality of thermal stages is stacked along an axial direction between a cold side and a hot side. Each of the plurality of thermal stages includes a plurality of magnets and a non-magnetic ring. The plurality of magnets is distributed along a circumferential direction within the non-magnetic ring in each of the plurality of thermal stages. The plurality of magnets and the non-magnetic ring of each of the plurality of thermal stages collectively define a cylindrical slot. The magneto-caloric cylinder is positioned within the cylindrical slot. In each of the plurality of magnets in one of the plurality of thermal stages, a first, second, third and fourth magnet segments are positioned and oriented such that the first, second, third and fourth magnet segments collectively form a closed loop high-field zone across the cylindrical slot.