Flexible thermoelectric device having radiative cooling part and method of manufacturing radiative cooling part
The present invention relates to a flexible thermoelectric device that may be combined and attached to a curved surface and generates an electromotive force based on a temperature difference between one surface and the other surface, and more particularly, to a flexible thermoelectric device having a radiative cooling part which improves power generation performance by increasing cooling efficiency of a cooling side through radiative cooling and minimizes a volume of a heat dissipating part, and a method of manufacturing a radiative cooling part.
1 . A flexible thermoelectric device including a heat dissipating part formed of a flexible material, the flexible thermoelectric device comprising:
a radiative cooling part provided on an outer surface of a heat dissipating part to cool the heat dissipating part by radiative cooling;
wherein the heat dissipating part comprises a metal foil, and the radiative cooling part is provided on the outer surface of the heat dissipating part,
wherein the radiative cooling part is formed of a thin film, has a thickness of 500 micrometers to 1000 micrometers and is formed to have flexible thickness,
wherein the radiative cooling part is composed of a plurality of radiant cooling parts, which the plurality of radiative cooling parts are coupled to form a predetermined pattern on the heat dissipating part and spaced apart from each other on the heat dissipating part,
wherein a water repellent part is provided in a space between the plurality of radiant cooling parts and is formed of a water repellent material, and
wherein a height of the water repellent part is formed higher than a height of the radiative cooling parts to prevent detachment of the radiative cooling parts caused by friction with water.
2 . The flexible thermoelectric device of claim 1 , wherein
the radiative cooling part is formed of a material emitting infrared rays in a wavelength range of 8 to 13 micrometers by electromagnetic resonance to cause radiative cooling.
3 . The flexible thermoelectric device of claim 1 , wherein
the radiative cooling part is attached to the outer surface of the heat dissipating part through an adhesive, and the adhesive includes an epoxy-based resin having high thermal conductivity or an olefin-based resin having high thermal conductivity.
4 . The flexible thermoelectric device of claim 1 , wherein
the radiative cooling part is formed by applying the radiative cooling material on the outer surface of the heat dissipating part.
5 . The flexible thermoelectric device of claim 1 , wherein
the radiative cooling part is formed of a flexible material to maintain a state in close contact with the heat dissipating part.
6 . The flexible thermoelectric device of claim 1 , wherein
the plurality of radiative cooling parts is stretchable and disposed on the heat dissipating part and spaced apart from each other at a predetermined distance so as to be coupled to each other to form a predetermined pattern on the heat dissipating part.
7 . The flexible thermoelectric device of claim 1 , wherein
the radiative cooling part is in the form of a thin film coupled to the outer surface of the heat dissipating part, the thin film having pores having a diameter of nano or micrometer units.