Thermoelectric power generation system

Abstract

The utility model relates to the technical field of precision machining, in particular to a temperature difference power generation system which comprises a temperature difference power generator, a radiation refrigeration device, a radiation heating device, a cold water pool and a cooling water pool. The thermoelectric generator and the radiation heating device are respectively connected with the thermoelectric generator and the radiation heating device, and the hot water pool is respectively connected with the thermoelectric generator and the radiation heating device. The thermoelectric power generation system ensures all-weather power generation, can utilize infrared light and solar energy to generate power, and improves the energy utilization rate.

Description

Technical Field

[0001] The present application relates to the technical field of thermoelectric power generation devices, and in particular to a thermoelectric power generation system. Background Art

[0002] Thermoelectric devices utilize the Seebeck effect of thermoelectric materials to directly utilize heat energy and convert it into electrical energy. Thermoelectric devices have broad application prospects due to their advantages of being green, compact, having no moving parts, being noiseless, and having a long service life. Thermoelectric devices are generally composed of several pairs of PN thermoelectric elements connected in series. During use, the hot end of the thermoelectric device is placed close to the heat source, and the cold end is connected to the heat sink, generating a temperature difference between the hot and cold ends of the device to generate an electric potential, and the greater the temperature difference, the greater the electric potential.

[0003] In the prior art, publication number: CN115118218A discloses a photovoltaic temperature difference power generation device based on radiation cooling, which can realize power generation using solar radiation. However, it can only generate electricity during the day and cannot generate electricity continuously, resulting in unstable power generation. Summary of the invention

[0004] The embodiment of the present application provides a temperature difference power generation system that can achieve all-weather power generation.

[0005] The present application embodiment provides a temperature difference power generation system, comprising:

[0006] Thermoelectric generator, used to generate electricity using the temperature difference between hot and cold.

[0007] A radiation cooling device is connected to the thermoelectric generator and is used to provide a cold source for the thermoelectric generator.

[0008] A radiation heating device is connected to the thermoelectric generator and is used to provide a heat source for the thermoelectric generator.

[0009] The cold water pool is connected to the temperature difference generator and the radiation cooling device respectively.

[0010] The hot water pool is connected to the temperature difference generator and the radiation heating device respectively.

[0011] According to the aforementioned embodiment of the first aspect of the present application, the radiation cooling device includes a cooling chamber, a cooling reflective plate, a cooling tube and a first light-transmitting window.

[0012] The refrigeration cavity is concave in shape.

[0013] The refrigeration reflective plate is laid in the refrigeration cavity.

[0014] The refrigeration pipe is located on the refrigeration reflector plate, and the refrigeration pipe coil is arranged in the refrigeration cavity. The liquid inlet end of the refrigeration pipe is connected to the cold water pool and the liquid outlet end is connected to the temperature difference generator.

[0015] The first light-transmitting window is fixed on the top of the refrigeration cavity, and the first light-transmitting window and the refrigeration cavity form a vacuum chamber.

[0016] According to the aforementioned embodiment of the first aspect of the present application, the radiation refrigeration device also includes a cold water pump, a first pressure reducing valve, a first pressure gauge and a first flow meter, and the cold water pump, the first pressure reducing valve, the first pressure gauge and the first flow meter are all installed on the connecting pipe between the refrigeration pipe and the cold water tank.

[0017] According to the aforementioned embodiment of the first aspect of the present application, the radiation refrigeration device also includes a first vacuum pump, a first vacuum gauge and a first pressure relief valve, and the first vacuum pump, the first vacuum gauge and the first pressure relief valve are all connected to the refrigeration chamber pipeline.

[0018] According to the aforementioned embodiment of the first aspect of the present application, the radiation cooling device further includes a radiation cooling film, and the radiation cooling film is fixed on the refrigeration tube.

[0019] According to the aforementioned embodiment of the first aspect of the present application, the radiation cooling device further includes an infrared anti-reflection film, and the infrared anti-reflection film is fixed on the first light-transmitting window.

[0020] According to the aforementioned embodiment of the first aspect of the present application, the radiation heating device includes a heating chamber, a heating reflection plate, a heating pipe and a second light-transmitting window.

[0021] The heating chamber is in the shape of a concave arc.

[0022] The heating reflective plate is laid in the heating cavity.

[0023] The heating pipe is located on the heating reflective plate, and the heating pipe is arranged in a circular arc in the heating cavity. The liquid inlet end of the heating pipe is connected to the hot water pool, and the liquid outlet end is connected to the temperature difference generator.

[0024] The second light-transmitting window is fixed on the top of the heating cavity, and the second light-transmitting window and the heating cavity form a vacuum chamber.

[0025] According to the aforementioned embodiment of the first aspect of the present application, the radiant heating device also includes a hot water pump, a second pressure reducing valve, a second pressure gauge and a second flow meter, and the hot water pump, the second pressure reducing valve, the second pressure gauge and the second flow meter are all installed on the connecting pipe between the heating pipe and the hot water pool.

[0026] According to the aforementioned embodiment of the first aspect of the present application, the radiant heating device also includes a second vacuum pump, a second vacuum gauge and a second pressure relief valve, and the second vacuum pump, the second vacuum gauge and the second pressure relief valve are all connected to the heating chamber pipeline.

[0027] According to the aforementioned embodiment of the first aspect of the present application, the radiation heating device also includes a solar heat absorption film, and the solar heat absorption film is fixed on the heating pipe.

[0028] According to the aforementioned embodiment of the first aspect of the present application, the radiant heating device further includes a visible light anti-reflection film, and the visible light anti-reflection film is fixed on the second light-transmitting window.

[0029] The embodiment of the present application utilizes infrared radiation cooling through the radiation cooling device during the day, and utilizes solar radiation heating through the radiation heating device at the same time. By transferring cold water and hot water to the temperature difference generator, a cold and hot temperature difference is formed, and then the temperature difference generator converts it into an electric potential and transmits electric energy outward through the transmission line; at night, the radiation cooling device utilizes infrared radiation cooling to form a temperature difference, and finally a large area of ​​power generation can be achieved, thereby ensuring all-weather power generation. Infrared light and solar energy can also be used for power generation to improve energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the connection relationship of a thermoelectric power generation system according to an embodiment of the present application;

[0031] Figure 2 This is a schematic structural diagram of a temperature difference power generation system according to an embodiment of the present application;

[0032] Figure 3 A schematic cross-sectional structure diagram of a refrigeration pipe of a temperature difference power generation system according to an embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure of a heating pipe of a temperature difference power generation system according to an embodiment of the present application.

[0034] Label: 1-temperature difference generator; 2-cold water pool; 3-hot water pool; 4-refrigeration chamber; 5-refrigeration reflector; 6-refrigeration pipe; 7-first light-transmitting window; 8-heating chamber; 9-heating reflector; 10-heating pipe; 11-second light-transmitting window; 12-cold water pump; 13-first pressure reducing valve; 14-first pressure gauge; 15-first flow meter; 16-hot water pump; 17-second pressure reducing valve; 18-second pressure gauge; 19-second flow meter; 20-first vacuum pump; 21-first vacuum gauge; 22-first pressure relief valve; 23-second vacuum pump; 24-second vacuum gauge; 25-second pressure relief valve; 26-radiation refrigeration film; 27-infrared anti-reflection film; 28-solar heat absorption film; 29-visible light anti-reflection film. DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0036] The embodiment of the present application provides a temperature difference power generation system for converting solar energy and infrared rays into temperature difference, and then using the temperature difference to generate electricity. The temperature difference power generation system of the present application includes a temperature difference generator 1, a radiation cooling device, a radiation heating device, a cold water pool 2 and a hot water pool 3, referring to Figure 1-2 .

[0037] The thermoelectric generator 1 is used to generate electricity using the temperature difference between cold and hot. The water inlet end is connected to the radiation cooling device and the radiation heating device respectively, and the water outlet end is connected to the top of the cold water pool 2 and the hot water pool 3 respectively, so that water can flow into the cold water pool 2 and the hot water pool 3 by its own weight.

[0038] The radiation cooling device has two ends connected to the thermoelectric generator 1 and the cold water pool 2 respectively, providing a cold source for the thermoelectric generator 1. The water in the cold water pool 2 can be extracted and cooled, and the cooled water is then transported to the thermoelectric generator 1 to cool the thermoelectric generator 1. The cooled water flows back to the cold water pool 2 for storage.

[0039] The radiation heating device has two ends connected to the thermoelectric generator 1 and the hot water pool 3 respectively, and is used to provide a heat source for the thermoelectric generator 1. The water in the hot water pool 3 can be extracted and heated, and the heated water is transported to the thermoelectric generator 1 to heat the thermoelectric generator 1, and the heated water flows back to the hot water pool 3 for storage.

[0040] The cold water pool 2 is connected to the temperature difference generator 1 and the radiation cooling device respectively. The water in the cold water pool 2 can be transported to the radiation cooling device for cooling, and the water flowing out of the temperature difference generator 1 can also be received.

[0041] The hot water pool 3 is connected to the thermoelectric generator 1 and the radiation heating device, respectively. The water in the hot water pool 3 can be transported to the radiation heating device for heating, and the water flowing out of the thermoelectric generator 1 can also be received.

[0042] The temperature difference power generation system of the embodiment of the present application absorbs the heat of the water temperature through the radiation cooling device, emits infrared light, and dissipates the heat, thereby cooling the water in the cold water pool 2. At the same time, the radiation heating device is used to absorb the energy of sunlight and convert it into thermal energy, thereby heating the water in the hot water pool 3. Both the cold and hot water are transported to the temperature difference generator 1 for temperature difference power generation, thereby utilizing temperature difference to generate electricity.

[0043] In some embodiments, reference Figure 2 The radiation refrigeration device includes a refrigeration cavity 4, a refrigeration reflective plate 5, a refrigeration tube 6 and a first light-transmitting window 7. The refrigeration cavity 4 is concave in shape and can accommodate the refrigeration tube 6. The refrigeration reflective plate 5 is laid inside the refrigeration cavity 4. The inner wall of the refrigeration cavity 4 is a thermal insulation material, which can reduce heat exchange and ensure the refrigeration effect. The refrigeration reflective plate 5 is laid in the refrigeration cavity 4. The bottom of the refrigeration reflective plate 5 is parallel to the bottom of the refrigeration cavity 4. The side of the refrigeration reflective plate 5 is tilted in the refrigeration cavity 4, which can refract the infrared waves emitted from the refrigeration tube 6 into the air, thereby achieving a cooling effect without consuming energy. The material of the refrigeration reflective plate 5 is a material with a high infrared emissivity in the mid-band, such as a metal mirror material or other materials. The refrigeration tube 6 is located on the refrigeration reflective plate 5 and can be fixed by a fixing buckle or other fixing parts. Fixed in the refrigeration cavity 4, the refrigeration tube 6 is stacked and arranged in the refrigeration cavity 4, and is located on the refrigeration reflector 5, which can facilitate the refrigeration reflector 5 to reflect the infrared light emitted by the refrigeration tube 6. The liquid inlet end of the refrigeration tube 6 is connected to the cold water pool 2 through a vacuum interface, and the liquid outlet end is connected to the temperature difference generator 1 through a vacuum interface. The vacuum interface can ensure that the water channel is sealed and does not leak while not affecting the vacuum. It is used to directly input the refrigerated water into the temperature difference generator 1, thereby providing a cold source for the temperature difference generator 1. The first light-transmitting window 7 is fixed on the top of the refrigeration cavity 4, which can facilitate the infrared light to be transmitted. The material of the first light-transmitting window 7 is a material with a high transmittance to mid-band infrared rays, such as germanium, zinc selenide or other materials. The first light-transmitting window 7 and the refrigeration cavity 4 form a vacuum chamber, thereby reducing heat exchange with the external connection and ensuring the refrigeration effect.

[0044] In the embodiment of the present application, the water in the cold water pool 2 is input into the refrigeration pipe 6, and the refrigeration pipe 6 is used to absorb the heat in the water and convert it into medium and long infrared waves with a wavelength of 8-13μm. The infrared waves are then scattered to the outside to achieve the effect of cooling and refrigeration. The cooled water is transported to the thermoelectric generator 1 to provide a cold source for the thermoelectric generator 1.

[0045] In some embodiments, the radiation refrigeration device also includes a cold water pump 12, a first pressure reducing valve 13, a first pressure gauge 14 and a first flow meter 15. The cold water pump 12 is installed on the connecting pipe between the refrigeration pipe 6 and the cold water pool 2, and can draw water in the cold water pool 2 and transport it to the refrigeration pipe 6 for refrigeration. The first pressure reducing valve 13 is installed on the connecting pipe between the refrigeration pipe 6 and the cold water pool 2, and can adjust the pipeline pressure. The water pressure and flow rate can be adjusted by the first pressure reducing valve 13 and the power of the cold water pump 12. The first pressure gauge 14 is installed on the connecting pipe between the refrigeration pipe 6 and the cold water pool 2, and is used to monitor the water pressure in the pipe. The first flow meter 15 is installed on the connecting pipe between the refrigeration pipe 6 and the cold water pool 2, and is used to monitor the flow rate and flow rate of the transported water.

[0046] In the embodiment of the present application, water is pumped from the bottom of the cold water pool 2 by a cold water pump 12, the water flow is monitored by a first flow meter 15, the pipeline pressure is monitored by a first pressure gauge 14, and the pipeline pressure is adjusted by a first pressure reducing valve 13.

[0047] In some embodiments, the radiation refrigeration device also includes a first vacuum pump 20, a first vacuum gauge 21 and a first pressure relief valve 22. The first vacuum pump 20 is connected to the interior of the refrigeration chamber 4 through a pipeline, and can extract the internal air to create a vacuum environment in the refrigeration chamber 4. The first vacuum gauge 21 is connected to the interior of the refrigeration chamber 4 through a pipeline, and can monitor the vacuum degree in the refrigeration chamber 4. The first pressure relief valve 22 is connected to the interior of the refrigeration chamber 4 through a pipeline, and can adjust the pressure in the refrigeration chamber 4.

[0048] In the embodiment of the present application, when the value of the first vacuum gauge 21 is detected to be abnormal, the vacuum degree inside the refrigeration chamber 4 can be adjusted by the first vacuum pump 20 and the first pressure relief valve 22 .

[0049] In some embodiments, the radiation cooling device further includes a radiation cooling film 26. Figure 3 The radiation cooling film 26 is fixed on the cooling tube 6. The radiation cooling film 26 is wrapped on the cooling tube 6, which can absorb the heat of the water and convert it into infrared waves, and then emit the infrared waves to achieve a cooling effect.

[0050] In the embodiment of the present application, the radiation cooling film 26 may be barium sulfate or other radiation cooling coatings.

[0051] In some embodiments, the radiation cooling device further includes an infrared anti-reflection film 27 , which is fixed on the first light-transmitting window 7 , and can enhance the transmittance of long-wave infrared light and improve the temperature reduction effect.

[0052] In the embodiment of the present application, the material of the infrared anti-reflection film 27 can be titanium oxide or other materials.

[0053] In some embodiments, the radiation heating device includes a heating cavity 8, a heating reflective plate 9, a heating pipe 10 and a second light-transmitting window 11. The heating cavity 8 is in the shape of a concave arc, which can collect sunlight and improve energy utilization. The shape of the heating reflective plate 9 is the same as the internal shape of the heating cavity 8. The inner wall is made of insulation material, which can reduce heat exchange and ensure the heating effect. The heating reflective plate 9 is made of a material with a high reflectivity to sunlight, such as a mirror material or other material, which can ensure the collection of light, thereby improving the utilization rate of light by the heating pipe 10. The heating pipe 10 is located on the heating reflective plate 9, and the heating pipe 10 is a circular disk arranged in the heating cavity 8. The heating pipe 1 0 is fixed in the heating cavity 8 by buckles or other fixings, the heating pipe 10 is made of a material with high heat transfer efficiency, the liquid outlet end of the heating pipe 10 is connected to the temperature difference generator 1, and the heated water can be transported to the temperature difference generator 1, and the liquid inlet end of the heating pipe 10 is connected to the hot water pool 3 through a pipeline, and the water in the hot water pool 3 can be drawn for heating, and the second light-transmitting window 11 is fixed on the top of the heating cavity 8. The material of the second light-transmitting window 11 is a material with high transmittance in the band with strong sunlight energy, such as quartz or other materials, which is convenient for the transmission of sunlight. The second light-transmitting window 11 and the heating cavity 8 form a vacuum chamber, which reduces the heat exchange between the inside and the outside, and plays a role in heat preservation.

[0054] In the embodiment of the present application, water is extracted from the hot water pool 3 and input into the heating pipe 10 to generate heat using solar light, and the heated water is then input into the thermoelectric generator 1 to provide a heat source for the thermoelectric generator 1 .

[0055] In some embodiments, the radiant heating device also includes a hot water pump 16, a second pressure reducing valve 17, a second pressure gauge 18 and a second flow meter 19. The hot water pump 16 is installed on the connecting pipe between the heating pipe 10 and the hot water pool 3, and can extract water in the hot water pool 4 and transport it to the heating pipe 10 for heating. The second pressure reducing valve 17 is installed on the connecting pipe between the heating pipe 10 and the hot water pool 3, and can adjust the pipeline pressure. The water pressure and flow rate can be adjusted by the second pressure reducing valve 17 and the power of the hot water pump 16. The second pressure gauge 18 is installed on the connecting pipe between the heating pipe 10 and the hot water pool 3, and is used to monitor the water pressure in the pipe. The second flow meter 19 is installed on the connecting pipe between the heating pipe 10 and the hot water pool 3, and is used to monitor the flow rate and flow rate of the transported water.

[0056] In the embodiment of the present application, water is pumped from the bottom of the hot water pool 3 by a hot water pump 16, the water flow is monitored by a second flow meter 19, the pipeline pressure is monitored by a second pressure gauge 18, and the pipeline pressure is adjusted by a second pressure reducing valve 17.

[0057] In some embodiments, the radiant heating device also includes a second vacuum pump 23, a second vacuum gauge 24 and a second pressure relief valve 25. The second vacuum pump 23 is connected to the heating chamber 8 through a pipeline, and can extract the internal air to create a vacuum environment in the heating chamber 8. The second vacuum gauge 24 is connected to the heating chamber 8 through a pipeline, and can monitor the vacuum degree in the heating chamber 8. The second pressure relief valve 25 is connected to the inside of the heating chamber 8 through a pipeline, and can adjust the pressure in the refrigeration chamber 4.

[0058] In the embodiment of the present application, when the value of the second vacuum gauge 24 is detected to be abnormal, the vacuum degree inside the heating chamber 8 can be adjusted by the second vacuum pump 23 and the second pressure relief valve 25 .

[0059] In some embodiments, the radiation heating device further includes a solar heat absorbing film 28. Figure 4 The solar heat absorbing film 28 is fixed on the heating tube 10. The solar heat absorbing film 28 is made of single crystal silicon or other materials, which can absorb sunlight and convert light energy into heat energy.

[0060] In the embodiment of the present application, the solar heat absorption film 28 absorbs sunlight to heat the water inside the heating pipe 10 , thereby increasing the temperature of the water in the heating pipe 10 .

[0061] In some embodiments, the radiation heating device also includes a visible light anti-reflection film 29, which is fixed on the second light-transmitting window 11. The visible light anti-reflection film 29 can reduce the intensity of reflected light, thereby increasing the intensity of transmitted light, thereby enhancing the heating effect of the subsequent heating tube 10.

[0062] In the embodiment of the present application, the material of the visible light anti-reflection film 29 is magnesium fluoride or other materials.

[0063] In summary, the embodiment of the present application utilizes infrared radiation cooling through the radiation cooling device during the day, and utilizes solar radiation heating through the radiation heating device, and forms a cold and hot temperature difference by transferring cold water and hot water to the thermoelectric generator 1, and then converts it into an electric potential through the thermoelectric generator 1 to transmit electric energy outward through the transmission line; at night, the radiation cooling device utilizes infrared radiation cooling to form a temperature difference, and finally can realize large-scale power generation, thereby ensuring all-weather power generation. Infrared light and solar energy can also be used for power generation to improve energy utilization.

Claims

1. Thermoelectric power generation system, characterized by: include Thermoelectric generator, used to generate electricity using the temperature difference between hot and cold. a radiation cooling device, connected to the temperature difference generator and used to provide a cold source for the temperature difference generator, a radiation heating device connected to the thermoelectric generator and used to provide a heat source for the thermoelectric generator, The cold water pool is connected to the temperature difference generator and the radiation cooling device respectively. The hot water pool is connected to the temperature difference generator and the radiation heating device respectively.

2. The thermoelectric power generation system according to claim 1, characterized in that: The radiation refrigeration device comprises a refrigeration cavity, a refrigeration reflection plate, a refrigeration tube and a first light-transmitting window. The refrigeration cavity is concave in shape. The refrigeration reflective plate is laid in the refrigeration cavity, The refrigeration pipe is located on the refrigeration reflection plate, and the refrigeration pipe coil is arranged in the refrigeration cavity. The liquid inlet end of the refrigeration pipe is connected to the cold water pool and the liquid outlet end is connected to the temperature difference generator. The first light-transmitting window is fixed on the top of the refrigeration cavity, and the first light-transmitting window and the refrigeration cavity form a vacuum chamber.

3. The temperature difference power generation system according to claim 2, characterized in that: The radiation refrigeration device also includes a cold water pump, a first pressure reducing valve, a first pressure gauge and a first flow meter, and the cold water pump, the first pressure reducing valve, the first pressure gauge and the first flow meter are all installed on the connecting pipe between the refrigeration pipe and the cold water tank.

4. The thermoelectric power generation system according to claim 2, characterized in that: The radiation refrigeration device further includes a first vacuum pump, a first vacuum gauge and a first pressure relief valve, wherein the first vacuum pump, the first vacuum gauge and the first pressure relief valve are all connected to the refrigeration chamber pipeline.

5. The temperature difference power generation system according to claim 2, characterized in that: The radiation cooling device further comprises a radiation cooling film, and the radiation cooling film is fixed on the cooling tube.

6. The thermoelectric power generation system according to claim 2, characterized in that: The radiation cooling device further comprises an infrared anti-reflection film, and the infrared anti-reflection film is fixed on the first light-transmitting window.

7. The thermoelectric power generation system according to claim 1, characterized in that: The radiation heating device comprises a heating chamber, a heating reflection plate, a heating pipe and a second light-transmitting window. The heating chamber is in the shape of an inwardly concave arc. The heating reflective plate is laid in the heating cavity, The heating pipe is located on the heating reflection plate, and the heating pipe is arranged in a circular arc shape in the heating cavity. The liquid inlet end of the heating pipe is connected to the hot water tank, and the liquid outlet end is connected to the temperature difference generator. The second light-transmitting window is fixed on the top of the heating cavity, and the second light-transmitting window and the heating cavity form a vacuum chamber.

8. The thermoelectric power generation system according to claim 7, characterized in that: The radiant heating device also includes a hot water pump, a second pressure reducing valve, a second pressure gauge and a second flow meter, and the hot water pump, the second pressure reducing valve, the second pressure gauge and the second flow meter are all installed on the connecting pipe between the heating pipe and the hot water pool.

9. The thermoelectric power generation system according to claim 7, characterized in that: The radiation heating device further comprises a second vacuum pump, a second vacuum gauge and a second pressure relief valve, and the second vacuum pump, the second vacuum gauge and the second pressure relief valve are all connected to the heating chamber pipeline.

10. The thermoelectric power generation system according to claim 7, characterized in that: The radiation heating device also includes a solar heat absorption film, which is fixed on the heating pipe.

11. The thermoelectric power generation system according to claim 7, characterized in that: The radiation heating device further comprises a visible light anti-reflection film, and the visible light anti-reflection film is fixed on the second light-transmitting window.

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