Inverted concave photo-thermal interface evaporation and photo-thermal power generation coupling device

Abstract

The utility model discloses an inverted concave photo-thermal interface evaporation and photo-thermal power generation coupling device, which belongs to the technical field of solar photo-thermal interface evaporation and photo-thermal power generation, and comprises a photo-thermal evaporation mechanism, a photo-thermal power generation mechanism and a photo-thermal power generation mechanism, the bottom of the water absorption block is immersed in seawater, so that the seawater is absorbed to the top photo-thermal coating; the photo-thermal power generation mechanism comprises a thermoelectric power generation piece, a groove is formed in the bottom of a water absorption block, so that the water absorption block is in an inverted concave shape, the top of the thermoelectric power generation piece is attached to the inner top wall of the groove, the water absorption block is provided with micropores, the photo-thermal coating is bonded to the top of the thermoelectric power generation piece through the micropores in the water absorption block, and the thermoelectric power generation piece is connected with an external circuit; and the fresh water collecting mechanism is used for collecting heated and evaporated fresh water. According to the system, photo-thermal evaporation and photo-thermal power generation are coupled, power generation is achieved on the basis of fresh water collection, efficient utilization of solar energy is achieved, and the energy utilization efficiency and the economical efficiency of system operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar light heat interface evaporation and photothermal power generation technical field, especially a kind of " inverted concave character " type light heat interface evaporation and photothermal power generation coupling device. BACKGROUND

[0002] Solar energy is a kind of green renewable energy with wide distribution range and high energy density, and seawater evaporation is a kind of universal natural phenomenon, and using sunlight to irradiate light heat material to carry out interface evaporation to collect fresh water is an effective way to produce fresh water.Solar seawater desalination technology gradually attracts attention due to its advantages of not consuming conventional energy, no pollution and high purity of obtained fresh water.However, in the process of producing fresh water by light heat interface evaporation, the temperature difference between the surface of light heat material and bulk water inevitably leads to waste of heat energy, therefore, combining seawater desalination and temperature difference power generation by using light heat effect to form "cogeneration of water and electricity" is a kind of more efficient green energy technology.

[0003] In recent years, light heat evaporation seawater desalination coupling device develops rapidly, for example, the Chinese patent with publication number CN111392796 designs solar light driven ion electro-osmotic power generation and light heat evaporation seawater desalination coupling device, which simultaneously realizes salinity gradient power generation and seawater desalination.However, the technology is to generate power by salinity gradient, not by temperature difference generated by sunlight on light heat material, which belongs to two different technical routes.In addition, the Chinese patents with publication numbers CN214101212 and CN221812365 respectively propose a kind of solar light heat temperature difference power generation device, but the two kinds of temperature difference power generation devices do not couple light heat interface evaporation.

[0004] At present, the structure of "cogeneration of water and electricity" equipment that simultaneously realizes seawater desalination and temperature difference power generation is usually relatively complex, and the evaporation process and power generation process of the equipment are usually antagonistic, leading to unsatisfactory evaporation efficiency and power generation efficiency, and the equipment is not easy to use.

[0005] Therefore, a kind of " inverted concave character " type light heat interface evaporation and photothermal power generation coupling device is proposed to realize more efficient energy utilization. UTILITY MODEL CONTENT

[0006] The utility model aims to provide a kind of " inverted concave character " type light heat interface evaporation and photothermal power generation coupling device, to solve or improve at least one of the above technical problems.

[0007] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a kind of " inverted concave character " type light heat interface evaporation and photothermal power generation coupling device, comprising:

[0008] The photothermal evaporation mechanism comprises a water absorption block, a top of the water absorption block is coated with a photothermal coating, and a bottom of the water absorption block is immersed in seawater so that seawater is absorbed to the top of the photothermal coating;

[0009] The photothermal power generation mechanism comprises a thermoelectric power generation sheet, a bottom of the water absorption block is provided with a groove so as to be in a shape of an inverted concave Chinese character, a top of the thermoelectric power generation sheet is attached to an inner top wall of the groove, the water absorption block is provided with micropores, the photothermal coating is adhered to the top of the thermoelectric power generation sheet through the micropores on the water absorption block, and the thermoelectric power generation sheet is connected with an external circuit.

[0010] The fresh water collection mechanism is used for collecting the evaporated fresh water.

[0011] Preferably, a heat dissipation fin is fixed to a bottom of the thermoelectric power generation sheet, a plurality of heat dissipation plates are fixed to a bottom of the heat dissipation fin, and the heat dissipation plates are immersed in seawater.

[0012] Preferably, the fresh water collection mechanism comprises a transparent cylindrical barrel, an annular collection groove is formed in a top of the transparent cylindrical barrel, a transparent hemispherical cover is fixed to the top of the transparent cylindrical barrel, the annular collection groove is located in the transparent hemispherical cover, the transparent cylindrical barrel is arranged around the water absorption block, the transparent hemispherical cover is arranged above the water absorption block, and the seawater is lower than the top of the transparent cylindrical barrel.

[0013] Preferably, a bottom of an inner wall surface of the transparent hemispherical cover is flush with a side wall on an outer ring of the annular collection groove.

[0014] Preferably, the water absorption block is any one of a three-dimensional polyurethane sponge and a three-dimensional aerogel material.

[0015] The water absorption block is used as a water conveying channel, seawater is continuously absorbed to the top of the water absorption block, sunlight is irradiated on the photothermal coating on the top of the water absorption block, light energy is converted into heat energy, the temperature of the photothermal coating is increased, the seawater on the top of the water absorption block is evaporated by heat, and the evaporated fresh water is collected through the fresh water collection mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and are used to interpret the illustrative embodiments of the present application and their descriptions, and are not intended to be an improper limitation on the present application. In the drawings:

[0017] Figure 1 A structure schematic view of the present application;

[0018] Figure 2 A longitudinal sectional view of the transparent hemispherical cover, the transparent cylindrical barrel and the "inverted concave character" water absorbing block in the present application;

[0019] Figure 3 A structure schematic view of the "inverted concave character" water absorbing block in the present application;

[0020] Figure 4 A structure schematic view of the water absorbing block, the thermoelectric power sheet and the heat dissipation sheet in the present application.

[0021] In the drawing: 1, water absorbing block; 2, thermoelectric power sheet; 3, groove; 4, heat dissipation sheet; 5, heat dissipation plate; 6, transparent cylindrical barrel; 7, annular collecting groove; 8, transparent hemispherical cover; 9, light-heat coating; 10, fan. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0024] With reference to Figures 1-4 The present application provides a "inverted concave character" light-heat interface evaporation and light-heat power generation coupling device, comprising:

[0025] The light-heat evaporation mechanism comprises a water absorbing block 1, a light-heat coating 9 is coated on the top of the water absorbing block 1, and the water absorbing block 1 is immersed in seawater at the bottom so as to absorb seawater to the light-heat coating 9 at the top;

[0026] The light-heat power generation mechanism comprises a thermoelectric power sheet 2, a groove 3 is arranged at the bottom of the water absorbing block 1 so as to be in the shape of "inverted concave character", the top of the thermoelectric power sheet 2 is attached to the inner top wall of the groove 3, the water absorbing block 1 has micropores, the light-heat coating 9 is adhered to the top of the thermoelectric power sheet 2 through the micropores on the water absorbing block 1, and the thermoelectric power sheet 2 is connected with an external circuit;

[0027] The fresh water collecting mechanism is used for collecting the fresh water evaporated by heating.

[0028] The photo-thermal coating 9 is made of ferriferrous oxide and fluorine resin, has high light absorption rate and good photo-thermal conversion performance, and realizes high-efficiency photo-thermal conversion.

[0029] The water absorption block 1 in the shape of "inverted concave character" can realize fixed installation of the thermoelectric generator 2 and combination with the photo-thermal interface, so as to realize coupling of the photo-thermal evaporation mechanism and the photo-thermal power generation mechanism.

[0030] The thermoelectric generator 2 is composed of two different semiconductor materials, one is a P-type semiconductor with hole charge carriers, and the other is an N-type semiconductor with electron charge carriers; the two materials form a PN junction at the contact point, and when there is a temperature difference between the two ends of the PN junction, a thermoelectric electromotive force is generated; the power generation principle of the thermoelectric generator 2 is based on the Seebeck effect, which is a kind of thermoelectric effect; when there is a temperature difference between the two ends of the thermoelectric generator, electrons will flow from the high-temperature end to the low-temperature end, thereby forming a potential difference inside the material, which can be used to drive current and realize conversion of electric energy; in the embodiment, the external circuit includes a motor and a fan 10.

[0031] The photo-thermal coating 9 is bonded to the top of the thermoelectric generator 2 through the micropores on the water absorption block 1, which plays a role in fixing the thermoelectric generator 2 and transferring heat to the thermoelectric generator 2; the water absorption block 1 serves as a water delivery channel to continuously absorb seawater to the top of the water absorption block 1, and the sunlight is incident on the photo-thermal coating 9 on the top of the water absorption block 1, so that the light energy is converted into heat energy, the temperature of the photo-thermal coating 9 is increased, the seawater on the top of the water absorption block 1 is evaporated by heating, and the fresh water is collected through the fresh water collecting mechanism; and since the photo-thermal coating 9 is bonded to the thermoelectric generator 2 through the micropores of the water absorption block 1, the heat generated by the photo-thermal coating 9 can be quickly transferred to the surface of the thermoelectric generator 2, the thermoelectric generator 2 generates a thermoelectric voltage, the thermoelectric voltage generates an electric current through the external circuit, and power generation is realized. The application couples photo-thermal evaporation and photo-thermal power generation, realizes power generation on the basis of fresh water collection, realizes efficient utilization of solar energy, and significantly improves energy utilization efficiency and economic efficiency of system operation.

[0032] In some optional embodiments, the thermoelectric generator 2 is fixedly connected with a heat sink 4 at the bottom, the heat sink 4 is fixedly connected with a plurality of heat dissipation plates 5 at the bottom, and the heat dissipation plates 5 are immersed in seawater.

[0033] The fin 4 and the heat sink 5 are integrally formed to constitute a heat dissipation structure at the bottom of the thermoelectric generator 2, and are made of aluminum alloy, brass or bronze; a layer of heat-conducting silicone grease is coated between the fin 4 and the thermoelectric generator 2, so that the heat at the bottom of the thermoelectric generator 2 can be effectively transferred to the fin 4 and the heat sink 5 for heat dissipation, the temperature difference of the thermoelectric generator 2 is increased, and the power generation efficiency is improved; the bottom of the heat sink 5 is immersed in seawater, the seawater cools the heat sink 5, and the heat dissipation efficiency is further improved; meanwhile, the heat sink 5 can also support the water absorption block 1.

[0034] In some optional embodiments, the fresh water collecting mechanism comprises a transparent cylindrical barrel 6, an annular collecting groove 7 is formed at the top of the transparent cylindrical barrel 6, a transparent hemispherical cover 8 is fixedly connected to the top of the transparent cylindrical barrel 6, the annular collecting groove 7 is located in the transparent hemispherical cover 8, the transparent cylindrical barrel 6 is arranged around the water absorption block 1, and the transparent hemispherical cover 8 is arranged above the water absorption block 1; the seawater is lower than the top of the transparent cylindrical barrel 6.

[0035] The transparent cylindrical barrel 6 and the transparent hemispherical cover 8 are both made of light-transmitting acrylic material; the seawater is heated and evaporated, the steam floats to the inner wall of the transparent hemispherical cover 8 and is condensed into liquid drops, the liquid flows downward along the arc-shaped inner wall of the transparent hemispherical cover 8 and falls into the annular collecting groove 7 for collection; a water outlet pipe is fixedly connected to the bottom of the side wall of the annular collecting groove 7, a valve is arranged on the water outlet pipe, and the opening and closing of the water outlet pipe is realized through the valve, so that the fresh water in the annular collecting groove 7 can be conveniently guided out.

[0036] In some optional embodiments, the bottom of the inner wall surface of the transparent hemispherical cover 8 is flush with the side wall on the outer ring of the annular collecting groove 7.

[0037] In some optional embodiments, the water absorption block 1 is any one of three-dimensional polyurethane sponge and three-dimensional aerogel material.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] The above-described embodiments are only preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A "inverted-recess-letter" type light-thermal interface evaporation and light-thermal power generation coupling device, characterized in that: The application relates to a photothermal evaporation mechanism, a photothermal power generation mechanism and a fresh water collection mechanism. The photothermal evaporation mechanism comprises a water absorption block (1), the top of the water absorption block (1) is coated with a photothermal coating (9), and the bottom of the water absorption block (1) is immersed in seawater so as to absorb seawater to the top photothermal coating (9). The photothermal power generation mechanism comprises a thermoelectric power generation sheet (2), the bottom of the water absorption block (1) is provided with a groove (3) so as to be in the shape of an inverted concave Chinese character, the top of the thermoelectric power generation sheet (2) is attached to the inner top wall of the groove (3), the water absorption block (1) is provided with micropores, the photothermal coating (9) passes through the micropores on the water absorption block (1) and is bonded to the top of the thermoelectric power generation sheet (2), and the thermoelectric power generation sheet (2) is connected with an external circuit. The fresh water collection mechanism is used for collecting the evaporated fresh water.

2. The device according to claim 1, wherein: The bottom of the thermoelectric power generation sheet (2) is fixedly connected with a heat dissipation fin (4), the bottom of the heat dissipation fin (4) is fixedly connected with a plurality of heat dissipation plates (5), and the bottom of the heat dissipation plates (5) is immersed in seawater.

3. The "inverted-recessed-letter" type photothermal interface evaporation and photothermal power generation coupling device according to claim 1, characterized in that: The fresh water collection mechanism comprises a transparent cylindrical barrel (6), the top of the transparent cylindrical barrel (6) is provided with an annular collection groove (7), the top of the transparent cylindrical barrel (6) is fixedly connected with a transparent hemispherical cover (8), the annular collection groove (7) is located in the transparent hemispherical cover (8), the transparent cylindrical barrel (6) is arranged around the water absorption block (1), the transparent hemispherical cover (8) is arranged above the water absorption block (1), and the seawater is lower than the top of the transparent cylindrical barrel (6).

4. The "inverted-recessed-letter" type photothermal interface evaporation and photothermal power generation coupling device according to claim 3, characterized in that: The bottom of the inner wall surface of the transparent hemispherical cover (8) is flush with the side wall on the outer ring of the annular collection groove (7).

5. The "inverted-recessed-letter" type photothermal interface evaporation and photothermal power generation coupling device according to claim 1, characterized in that: The water absorption block (1) is any one of three-dimensional polyurethane sponge and three-dimensional aerogel material.

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