A magnetic heat power generation device; a magnetic heat power generation unit comprises two main supports that are correspondingly connected, and comprises a rotor, a stator and a heating and cooling device; the rotor comprises an annular support; even-numbered groups of hard magnetic fixing grooves are formed on each of two sides of the annular support; a plurality of magnet locking plates in one-to-one correspondence to the hard magnetic fixing grooves is disposed on the annular support; connection portions of one supporting beam and the main supports are provided with adjusting grooves; mounting brackets are disposed on the adjusting grooves; the mounting brackets are provided with stationary retention magnets; a heat insulation plate is disposed on each of two sides of the connection portion of a mounting plate and a transfer arm of the heating and cooling device.

A wasted heat harvesting device for harvesting electricity including a switching device configured to convey a magnetic field from a first region to at least a second region when the temperature of the switching device crosses a predetermined temperature.

A wasted heat harvesting device for harvesting electricity including switching means configured to convey a magnetic field from a first region to at least a second region when the temperature of the switching means crosses a predetermined temperature.

An object of the present invention is to provide a low-cost thermoelectric converter element having high productivity and excellent conversion efficiency. A thermoelectric converter element according to the present invention includes a substrate 4, a magnetic film 2 provided on the substrate 4 with a certain magnetization direction A and formed of a polycrystalline magnetically insulating material, and an electrode 3 provided on the magnetic film 2 with a material exhibiting a spin-orbit interaction. When a temperature gradient is applied to the magnetic film 2, a spin current is generated so as to flow from the magnetic film 2 toward the electrode 3. A current I is generated in a direction perpendicular to the magnetization direction A of the magnetic film 2 by the inverse spin Hall effect in the electrode 3.

A thermoelectric conversion element includes: a magnetic body having a magnetization; and an electromotive body formed of material exhibiting a spin orbit coupling and jointed to the magnetic body. The magnetic body has an upper joint surface jointed to the electromotive body. The upper joint surface has concavities and convexities.

This invention relates to a cooling device which utilizes both thermoelectric and magnetocaloric mechanisms for enhanced cooling applications. Using high thermal conductivity magnetocaloric composites in conjunction with thermoelectric elements acting as thermal switches which are electrically coupled to a magnetization and demagnetization cycle enables the use of larger quantities of magnetocaloric material, and high efficiency solid state cooling can be achieved. Solid state cooling devices are useful for a variety of industrial applications which require cooling, such as, but not limited to cooling of microelectronic devices, cooling on space platforms, etc.

A system includes at least one capacitor comprising a dielectric material having a Curie temperature, each capacitor exhibiting an increased capacitance at a temperature below the Curie temperature and exhibiting a decreased capacitance at a temperature above the Curie temperature, a liquid source positioned adjacent to the capacitor and having a temperature above the Curie temperature, and means for exposing the capacitor to the liquid source for a predetermined time so the temperature of the dielectric material exceeds the Curie temperature, at which point the capacitance decreases. A voltage storage is connected to the capacitors to capture the increased voltage discharged from the capacitors. The capacitors are then removed from the liquid source and cooled. The capacitors may iteratively be recharged, exposed to the liquid source until their temperature exceeds the Curie temperature, connected to the voltage storage, removed from the liquid source, and cooled.

A thermal oscillator (10) for creating an oscillating heat flux from a stationary spatial thermal gradient between a warm reservoir (20) and a cold reservoir (30) is provided. The thermal oscillator (10) includes a thermal conductor (11) which is connectable to the warm reservoir (20) or to the cold reservoir (30) and configured to conduct a heat flux from the warm reservoir (20) towards the cold reservoir (30), and a thermal switch (12) coupled to the thermal conductor (11) for receiving the heat flux and having a certain difference between two states (S1, S2) of thermal conductance for providing thermal relaxation oscillations such that the oscillating heat flux is created from the received heat flux.

A method for producing a micro system, said method comprising: providing a substrate (2) made of aluminum oxide; producing a thin film (6) on the substrate (2) by depositing lead zirconate titanate onto the substrate (2) with a thermal deposition method such that the lead zirconate titanate in the thin film (6) is self-polarized and is present predominantly in the rhombohedral phase; and cooling down the substrate (2) together with the thin film (6).