CN217282757U

CN217282757U - Solar thermoelectric power generation piece

Info

Publication number: CN217282757U
Application number: CN202220865469.1U
Authority: CN
Inventors: 李爱丽; 李方军; 于春锋; 冯艳丽; 迟晓燕
Original assignee: Shandong Sanqi Energy Co ltd
Current assignee: Shandong Sanqi Energy Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-23
Anticipated expiration: 2032-04-14

Abstract

The utility model discloses a solar energy thermoelectric generation piece, including hot junction base plate, thermoelectric generation unit and cold junction base plate, thermoelectric generation unit sets up between hot junction base plate and cold junction base plate, the hot junction base plate is equipped with solar energy selective absorption coating on the outer terminal surface of thermoelectric generation unit dorsad, is equipped with the radiation refrigeration layer on the outer terminal surface of cold junction base plate dorsad thermoelectric generation unit. The utility model adopts the structure that the solar selective absorbing coating is directly combined on the outer end surface of the hot end substrate back to the thermoelectric power generation unit as the hot end, thereby eliminating the thermal resistance existing in the metal plate and the heat-conducting silicone grease, improving the thermoelectric conversion efficiency of the solar thermoelectric power generation unit, reducing the material cost and improving the production efficiency; the radiation refrigeration layer has higher infrared radiation cooling performance in the range of an atmospheric window, so that the passive cooling of the solar thermoelectric power generation unit is realized, and the energy consumption in an active cooling mode is saved.

Description

Solar thermoelectric power generation piece

Technical Field

The utility model relates to a solar energy thermoelectric generation piece that utilizes solar heat and radiation cooling mode to generate electricity in light and heat, radiation refrigeration, the thermoelectric generation field belongs to new forms of energy technical field.

Background

The thermoelectric generation piece is a device for directly converting heat energy into electric energy by utilizing the seebeck effect. When the thermoelectric power generation unit works, one end of the power generation piece is maintained at high temperature, the other end of the power generation piece is maintained at low temperature, and the thermoelectric power generation unit converts heat energy into electric energy by utilizing the temperature difference between the hot end and the cold end to output the electric energy. The thermoelectric power generation piece has the characteristics of no noise, long service life, stable performance and the like, and with the increasing demand for environmental protection and energy conservation in modern society, people consider how to effectively convert solar heat, ocean heat, geothermal heat, industrial waste heat and other heat energy into electric energy.

Solar energy has been attracting attention as a clean, sustainable energy source. In a traditional device for directly converting solar energy into electric energy, an independent solar heat absorbing plate and an independent thermoelectric power generation sheet are generally adopted, and then the independent solar heat absorbing plate and the independent thermoelectric power generation sheet are combined together, so that the device has the performance of solar thermoelectric power generation. The solar heat absorbing plate comprises a metal plate and a solar selective absorbing coating attached to the metal plate, wherein the solar selective absorbing coating is a functional film layer for converting solar energy into heat energy, and has high absorptivity in a solar radiation waveband (0.3-2.5 microns) and low emissivity in an infrared emission waveband (2.5-25 microns) of object thermal radiation. In the prior art, the solar heat absorption plate is connected with the thermoelectric power generation unit through heat-conducting silicone grease in the combination process. Due to the existence of the heat-conducting silicone grease and the metal plate, additional thermal resistance is introduced between the solar selective absorption coating and the temperature difference power generation unit, the heat conduction rate is reduced, and the thermoelectric conversion efficiency of the temperature difference power generation unit is reduced.

Disclosure of Invention

The utility model aims to solve the technical problem that to the defect that prior art exists, a solar energy thermoelectric generation piece is provided.

For solving this technical problem, the utility model provides a solar energy thermoelectric generation piece, including hot junction base plate, thermoelectric generation unit and cold junction base plate, the thermoelectric generation unit sets up between hot junction base plate and cold junction base plate, be equipped with solar energy selectivity absorption coating on the outer terminal surface of hot junction base plate difference in temperature generating unit dorsad, be equipped with the radiation refrigeration layer on the outer terminal surface of cold junction base plate difference in temperature generating unit dorsad.

The hot end substrate and the cold end substrate are made of insulating heat-conducting materials, and the insulating heat-conducting materials are one of an alumina ceramic plate, an aluminum nitride ceramic plate and a silicon carbide ceramic plate.

The thermoelectric generation unit comprises many pairs of thermoelectric generation particles, the thermoelectric generation particle is "nearly" style of calligraphy structure, including water conservancy diversion piece, thermoelectric generation material one and thermoelectric generation material two, the water conservancy diversion piece is located two upper and lower tip of thermoelectric generation particle, thermoelectric generation material one and thermoelectric generation material two are located thermoelectric generation particle's left and right sides respectively.

The thermoelectric power generation particles are made of P-type N-type semiconductor materials, wherein the first thermoelectric power generation material is a P-type semiconductor material, and the second thermoelectric power generation material is an N-type semiconductor material; or the thermoelectric generation particles are made of different metal materials, wherein the first thermoelectric generation material is a metal material, and the second thermoelectric generation material is another metal material different from the first thermoelectric generation material.

The solar selective absorption coating is a composite layer structure or a single-layer solar selective absorption material consisting of a reflecting layer, an absorption layer and an antireflection layer.

The solar selective absorbing coating is a composite structure layer with high temperature resistance and is directly compounded on the outer end face of the hot-end substrate by spraying, electrochemical plating, vacuum evaporation or vacuum sputtering.

The radiation refrigeration layer is a composite layer structure or a single-layer radiation refrigeration coating which is composed of a reflection layer and an infrared emission layer and has all-weather radiation cooling performance, and is directly compounded on the outer end face of the cold end substrate by a spraying, vacuum evaporation or vacuum sputtering method.

The radiation refrigeration layer is a high-temperature-resistant far infrared radiation refrigeration coating and is directly compounded on the outer end surface of the cold end substrate by a spraying, vacuum evaporation or vacuum sputtering method.

The solar selective absorption coating is directly contacted with the hot end substrate, and the radiation refrigeration layer is directly contacted with the cold end substrate.

Has the advantages that: the utility model discloses an on the outer terminal surface of hot junction base plate dorsad thermoelectric generation unit the structure of direct bonding solar energy selectivity absorption coating as the hot junction, the thermal resistance of introducing when having eliminated metal sheet and heat conduction silicone grease and having existed has promoted solar energy thermoelectric generation unit's thermoelectric conversion efficiency, has reduced the material cost who uses metal sheet and heat conduction silicone grease simultaneously and has reduced corresponding manufacturing procedure, has promoted production efficiency. In addition, for further reducing the heat dissipation of solar energy thermoelectric generation unit cold junction, adopt on the outer terminal surface of cold junction base plate dorsad thermoelectric generation unit the structure on direct combination radiation refrigeration layer as the cold junction, have higher infrared radiation's cooling performance in the atmospheric window scope through radiation refrigeration layer, realize solar energy thermoelectric generation unit's passive form cooling to help saving the energy resource consumption in the initiative cooling mode.

Drawings

Fig. 1 is a schematic structural view of a solar thermoelectric power generation sheet of the present invention in fig. 1;

in the figure: 1. a hot side substrate; 2. a thermoelectric power generation unit; 3. a cold end substrate; 4. a solar selective absorber coating; 5. a radiation refrigeration layer; 6. thermoelectric power generation particles; 7. a flow deflector; 8. a first thermoelectric generation material; 9. and a second thermoelectric generation material.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the utility model provides a solar energy thermoelectric generation piece, including hot junction base plate 1, thermoelectric generation unit 2 and cold junction base plate 3, thermoelectric generation unit 2 sets up between hot junction base plate 1 and cold junction base plate 3 through the welding, be equipped with solar energy selectivity absorption coating 4 on hot junction base plate 1 dorsad thermoelectric generation unit 2's the outer terminal surface, be equipped with radiation refrigerating layer 5 on cold junction base plate 3 dorsad thermoelectric generation unit 2's the outer terminal surface.

The hot end substrate 1 and the cold end substrate 3 are made of insulating heat-conducting materials, preferably one of alumina ceramic plates, aluminum nitride ceramic plates and silicon carbide ceramic plates.

Thermoelectric generation unit 2 comprises many pairs of thermoelectric generation particle 6, thermoelectric generation particle 6 is "nearly" style of calligraphy structure, including water conservancy diversion piece 7, thermoelectric generation material 8 and thermoelectric generation material two 9, water conservancy diversion piece 7 is located thermoelectric generation particle 6's two upper and lower tip, thermoelectric generation material 8 and thermoelectric generation material two 9 are located thermoelectric generation particle 6's left and right sides both sides respectively.

The thermoelectric generation particles 6 are made of P-type N-type semiconductor materials, wherein the first thermoelectric generation material 8 is a P-type semiconductor material, and the second thermoelectric generation material 9 is an N-type semiconductor material; or, the thermoelectric generation particles 6 are made of different metal materials, wherein the first thermoelectric generation material 8 is a metal material, and the second thermoelectric generation material 9 is another metal material different from the first thermoelectric generation material 8.

The solar selective absorbing coating 4 is a composite layer structure composed of a reflecting layer, an absorbing layer and an antireflection layer or a single-layer solar selective absorbing material.

The solar selective absorbing coating 4 is a composite structure layer with high temperature resistance, and is directly compounded on the outer end face of the hot end substrate 1 by spraying, electrochemical plating, vacuum evaporation or vacuum sputtering.

The radiation refrigeration layer 5 is a composite layer structure or a single-layer radiation refrigeration coating which is composed of a reflection layer and an infrared emission layer and has all-weather radiation cooling performance, and is directly compounded on the outer end face of the cold end substrate 3 through a spraying, vacuum evaporation or vacuum sputtering method.

The radiation refrigeration layer 5 is a high-temperature-resistant far infrared radiation refrigeration coating and is directly compounded on the outer end surface of the cold end substrate 3 by a spraying, vacuum evaporation or vacuum sputtering method.

The solar selective absorption coating 4 is directly contacted with the hot end substrate 1, and the radiation refrigeration layer 5 is directly contacted with the cold end substrate 3.

The working principle is as follows: thermoelectric power generation is a technology that converts thermal energy into electrical energy using the seebeck effect of two connected conductors or semiconductors. The seebeck effect is derived from the distribution and motion characteristics of carriers inside the material, and when a temperature difference exists between the two ends of the material, the carriers near the hot end have higher kinetic energy than those near the cold end. For semiconductor materials, the quantity of carriers excited by heating near the hot end into the conduction band or the valence band is higher than that near the cold end, so that the diffusion of the carriers from the hot end to the cold end is formed in the material. The movement of the current carriers can destroy the original uniform distribution of the current carriers in the material, and the current carriers gathered near the cold end can generate a self-establishing electric field to prevent the current carriers from continuously diffusing from the hot end to the cold end. When this process eventually reaches equilibrium, there is no more directional movement of charge within the conductor. An electromotive force, namely a Seebeck potential, is generated at two ends of the conductor.

The working process is as follows: the solar selective absorption coating converts sunlight into heat energy, so that the hot-end substrate has higher temperature. The radiation refrigeration layer enables the cold-end substrate to have lower temperature through a radiation refrigeration mode. The temperature difference power generation unit directly converts the temperature difference into electric energy by utilizing the temperature difference between the hot end substrate and the cold end substrate, and outputs the electric energy through the flow deflectors.

The utility model discloses an on the outer terminal surface of hot junction base plate one dorsad thermoelectric generation unit the structure of direct bonding solar energy selectivity absorption coating as the hot junction, the thermal resistance of introducing when having eliminated metal sheet and heat conduction silicone grease and having existed has promoted solar energy thermoelectric generation unit's thermoelectric conversion efficiency, has reduced the material cost who uses metal sheet and heat conduction silicone grease simultaneously and has reduced corresponding manufacturing procedure, has promoted production efficiency. In addition, for further reducing the heat dissipation of solar energy thermoelectric generation unit cold junction, adopt on the outer terminal surface of cold junction base plate dorsad thermoelectric generation unit the structure on direct combination radiation refrigeration layer as the cold junction, have higher infrared radiation's cooling performance in the atmospheric window scope through radiation refrigeration layer, realize solar energy thermoelectric generation unit's passive form cooling to help saving the energy resource consumption in the initiative cooling mode.

The above embodiments of the present invention are only examples, not only, and all changes within the scope of the present invention or the same range of the present invention are all encompassed by the present invention.

Claims

1. The utility model provides a solar energy thermoelectric generation piece which characterized in that: including hot junction base plate (1), thermoelectric generation unit (2) and cold junction base plate (3), thermoelectric generation unit (2) set up between hot junction base plate (1) and cold junction base plate (3), be equipped with solar energy selective absorption coating (4) on the outer terminal surface of hot junction base plate (1) temperature difference power generation unit (2) dorsad, be equipped with radiation refrigeration layer (5) on the outer terminal surface of cold junction base plate (3) temperature difference power generation unit (2) dorsad.

2. The solar thermoelectric generation sheet according to claim 1, wherein: the hot end substrate (1) and the cold end substrate (3) are made of insulating heat conduction materials, and the insulating heat conduction materials are made of one of an alumina ceramic plate, an aluminum nitride ceramic plate and a silicon carbide ceramic plate.

3. The solar thermoelectric generation piece of claim 1, wherein: thermoelectric generation unit (2) comprises many pairs of thermoelectric generation particle (6), thermoelectric generation particle (6) are "nearly" style of calligraphy structure, including water conservancy diversion piece (7), thermoelectric generation material (8) and thermoelectric generation material two (9), two upper and lower tip that water conservancy diversion piece (7) are located thermoelectric generation particle (6), thermoelectric generation material (8) and thermoelectric generation material two (9) are located thermoelectric generation particle (6) left and right sides both sides respectively.

4. The solar thermoelectric generation sheet according to claim 3, wherein: the thermoelectric generation particles (6) are made of P-type N-type semiconductor materials, wherein the first thermoelectric generation material (8) is a P-type semiconductor material, and the second thermoelectric generation material (9) is an N-type semiconductor material; or the thermoelectric generation particles (6) are made of different metal materials, wherein the first thermoelectric generation material (8) is a metal material, and the second thermoelectric generation material (9) is another metal material different from the first thermoelectric generation material (8).

5. The solar thermoelectric generation sheet according to claim 1, wherein: the solar selective absorption coating (4) is a composite layer structure or a single-layer solar selective absorption material consisting of a reflecting layer, an absorption layer and an antireflection layer.

6. The solar thermoelectric generation sheet according to claim 1, wherein: the solar selective absorbing coating (4) is a composite structure layer with high temperature resistance and is directly compounded on the outer end face of the hot end substrate (1) by spraying, electrochemical plating, vacuum evaporation or vacuum sputtering.

7. The solar thermoelectric generation sheet according to claim 1, wherein: the radiation refrigeration layer (5) is a composite layer structure or a single-layer radiation refrigeration coating which is composed of a reflection layer and an infrared emission layer and has all-weather radiation cooling performance, and is directly compounded on the outer end face of the cold end substrate (3) through a spraying, vacuum evaporation or vacuum sputtering method.

8. The solar thermoelectric generation sheet according to claim 1, wherein: the radiation refrigeration layer (5) is a high-temperature-resistant far infrared radiation refrigeration coating and is directly compounded on the outer end surface of the cold end substrate (3) by a spraying, vacuum evaporation or vacuum sputtering method.

9. The solar thermoelectric generation sheet according to any one of claims 1 to 8, wherein: the solar selective absorption coating (4) is directly contacted with the hot end substrate (1), and the radiation refrigeration layer (5) is directly contacted with the cold end substrate (3).