Water taking and power generation integrated device for remote island

Abstract

The invention discloses a water taking and power generation integrated device for a remote island. The device comprises a box body which comprises an upper square body and a lower conical body; the power generation module is arranged on the box body; the water collecting module is arranged below the box body; the energy storage module is connected with the power generation module; the upper square body is provided with a containing cavity, one side of the containing cavity is provided with a ventilation opening allowing moisture-containing atmosphere to enter, the ventilation opening is provided with a cover plate matched with the ventilation opening, the cover plate is provided with an opening and closing assembly capable of achieving opening and closing, and the energy storage module is electrically connected with the opening and closing assembly; the power generation module further comprises an adsorption assembly connected with the lower end face of the thermoelectric power generation assembly, the adsorption assembly comprises a plurality of fins, the fins are arranged in the containing cavity in parallel and face the ventilation opening, the fins are loaded with MIL-101 (Cr) materials, and the MIL-101 (Cr) materials 232 of every two adjacent fins make contact with each other. Therefore, the MIL-101 (Cr) material can adsorb atmospheric moisture entering the accommodating cavity from the ventilation opening.

Description

Technical Field

[0001] The present invention relates to the technical field of energy utilization equipment, and more specifically, to an integrated water extraction and power generation device for remote islands. Background Art

[0002] Traditional diesel power generation relies primarily on externally transported fossil fuels, which is not only costly and polluting, but also places a strain on islands' limited land resources and presents transportation risks and instability. Traditional methods also rely on external transportation for freshwater replenishment, but this inevitably leads to evaporation and leakage during long-distance transport, making it difficult to meet the water needs of island residents. Furthermore, external transportation is energy-intensive, requires complex equipment, and has high operating and maintenance costs, making it unsuitable for widespread implementation on remote or resource-limited islands.

[0003] In contrast, utilizing renewable energy sources like solar power for power generation and water extraction on islands offers significant advantages. Photovoltaic power generation effectively captures solar energy for sustainable power output, significantly reducing reliance on external energy sources, lowering transportation costs, and improving energy supply stability. Furthermore, the heat absorption and radiative cooling properties of photovoltaic modules create temperature differences between daytime and nighttime. TEG power generation modules can exploit this temperature difference to generate power throughout the day, which can be used to power island traffic lights, lighting, and other applications, further enhancing the system's practicality.

[0004] In terms of fresh water acquisition, the island environment has high humidity and sufficient water in the atmosphere, which provides good conditions for atmospheric water collection. Atmospheric water collection utilizes the adsorption-desorption characteristics of adsorbent materials. In an island environment where the temperature is high during the day and low at night, the adsorbent materials effectively adsorb and release water under the temperature difference between day and night to achieve the purpose of water collection. Compared with seawater desalination, atmospheric water collection is not restricted by geographical location and can be implemented regardless of whether it is on the coast of an island or in remote areas. It not only replenishes fresh water resources, but also provides a new means of obtaining water when fresh water is scarce on an island. Atmospheric water collection technology also has more advantages in equipment investment and operating costs. It is expected to meet part of the daily water demand at a lower cost, demonstrating a sustainable, efficient, and adaptable water resource solution for the special environment of an island.

[0005] In order to solve the above problems, after searching, Chinese patent CN119686416A discloses an atmospheric water extraction device that operates under full working conditions, including a solar power supply unit, a salt-loaded water gel adsorption-desorption unit, an electric heating desorption unit, a water vapor condensation collection unit and a PID control unit; wherein the solar power supply system includes a solar photovoltaic panel, an MPPT type photovoltaic inverter and a battery, the salt-loaded water gel adsorption-desorption unit includes a hydrophilic porous hydrogel and a LiCl / CaCl2 composite adsorption material, the electric heating desorption unit consists of a copper heat conduction plate loaded with adsorption material and an electric heating plate, the water vapor condensation collection unit consists of four finned radiators and two semiconductor refrigeration plates, and the PID control unit consists of a temperature and humidity sensor connected to the radiator and the front side of the adsorption bed and a control circuit. The present invention enriches water vapor in the environment through an efficient salt-loaded adsorbent packed bed, and drives desorption by solar thermal and electric heating. The desorbed high-humidity airflow passes through the semiconductor-connected finned heat sink and condenses into liquid water, and the atmospheric water extraction process is completed through the collector below.

[0006] However, the atmospheric water extraction device disclosed in the patent adopts a straight-through structure, and the desorbed high-humidity airflow will be partially extracted, resulting in low water extraction efficiency, and therefore needs further improvement. Summary of the Invention

[0007] 1. Problems to be solved

[0008] In response to the above technical problems, the purpose of the present invention is to provide an integrated water extraction and power generation device for remote islands, which can improve the efficiency of atmospheric water extraction while ensuring power supply to remote islands.

[0009] 2. Technical solution

[0010] To achieve the above object, the present invention adopts the following technical solutions:

[0011] A first aspect of the present invention provides an integrated water extraction and power generation device for use on remote islands, comprising:

[0012] The box body comprises an upper square body and a lower conical body;

[0013] A power generation module placed on the box, the power generation module including a photovoltaic module and a thermoelectric generation module, the photovoltaic module being arranged on the upper surface of the thermoelectric generation module, with its front side facing the direction of sunlight and absorbing solar energy, and its back side in contact with the thermoelectric generation module; the thermoelectric generation module is used to convert waste heat generated by the photovoltaic panel into electrical energy;

[0014] A water collection module placed under the box body, used to collect condensed water;

[0015] and an energy storage module connected to the power generation module, for collecting and storing the electrical energy converted by the thermoelectric generation assembly and the photovoltaic assembly;

[0016] The upper square body has a receiving cavity, a vent is provided on one side of the receiving cavity for allowing moisture-containing air to enter, a cover is provided on the vent to cooperate with it, and the cover is equipped with an opening and closing assembly that can be opened and closed, and the energy storage module is electrically connected to the opening and closing assembly;

[0017] The power generation module also includes an adsorption component connected to the lower end surface of the thermoelectric power generation component, which can transfer the residual heat of the thermoelectric power generation component to the MIL-101 (Cr) material through the fins, providing a stable temperature environment for water condensation. At the same time, the fins help the photovoltaic panel to dissipate heat, reduce the temperature of the photovoltaic panel, and improve the heat dissipation area of ​​power generation efficiency;

[0018] The adsorption assembly includes a plurality of fins, which are arranged in parallel in the accommodating cavity and face the vent. The fins are loaded with MIL-101 (Cr) material, and the MIL-101 (Cr) materials of two adjacent fins are in contact, so that the MIL-101 (Cr) material can adsorb atmospheric moisture entering the accommodating cavity through the vent.

[0019] The lower conical body of the present invention is not only conducive to the collection of condensed water, but also when used during the day, the vent is closed by the cover to construct a relatively closed internal environment (the bottom is connected to the water reservoir of the water collection module, which is equivalent to a bottom seal), preventing the leakage of desorbed high-humidity gas, and is conducive to maintaining heat stability and concentration, thereby improving the heat transfer efficiency between components and improving the overall operating efficiency. In addition, the space of the upper square body is larger than the space of the lower conical body. The cold air entering through the gap during the day first meets the hot air (water vapor) and then, under the action of disturbance, enters the small space below from the large space above, increasing the collision of water molecules in the atmosphere and the probability of condensation contact with the lower conical body, effectively improving the condensation and water collection efficiency of the present invention.

[0020] The above-mentioned adsorption component uses MIL-101(Cr) material with a water desorption rate of 86.67 mL / (kg·h) per 10 g of material, and 20 g is evenly loaded on the fin surface of a rectangular MIL-101(Cr) material with a size of 0.9 m×0.9 m.

[0021] The above-mentioned photovoltaic components are used for power generation and heat collection during the day / radiative cooling process at night and the synergistic effect of dehumidification and heat absorption / heat release of MIL-101(Cr) ((metal-organic frameworks, MOFs metal organic frameworks)) materials. In the box, the MIL-101(Cr) material adsorbs and desorbs water vapor, and the water vapor contacts the inner surface of the lower conical body to condense to form liquid water without forming water droplets. Under the action of gravity, the liquid water flows downward to realize the collection of condensed water; the power generation module utilizes the environmental differences between day and night and is designed with two day and night operation modes to achieve the multifunctional synergistic effect of solar power generation, thermoelectric conversion and atmospheric moisture collection, thereby maximizing the system's energy and water resource output.

[0022] Specifically, place the fin flat in the ceramic box and perform the following operations in sequence:

[0023] (1) Evenly spread a layer of MIL-101(Cr) powder on the fin;

[0024] (2) Add sodium silicate solution to the MIL-101(Cr) powder layer at a ratio of 10% by weight of the powder until a viscous paste is formed;

[0025] (3) Repeating steps (1) and (2) layer by layer, the MIL-101 (Cr) material is composited on the fin surface to achieve uniform coverage;

[0026] (4) The fin loaded with MIL-101(Cr) material was transferred to an electric constant temperature blast drying oven and dried at a constant temperature of 100°C for 12 hours to ensure that the MIL-101(Cr) material was completely cured and shaped.

[0027] It should be noted that the above-mentioned MIL-101 (Cr) material has a strong adsorption effect on water molecules, and can distinguish between water molecules and strange gas molecules to a certain extent, preferentially adsorbing water vapor, achieving efficient atmospheric moisture capture and improving the efficiency and purity of water extraction. At the same time, it has the characteristics of good thermal stability, adjustability and strong environmental adaptability.

[0028] According to any embodiment of the first aspect of the purpose of the present invention, in order to accelerate the flow of the desorbed atmosphere, the upper end of the cover plate is rotatably connected to the upper square body through a rotating shaft, and the four sides of the cover plate are fitted with gaps at the edges of the vent, so as to make full use of the hot air (water vapor) in the accommodating cavity and the cold air from the outside, and allow the cold air to enter the accommodating cavity through the gaps, and the hot and cold air (water vapor) converge to form a local atmospheric disturbance, which can increase the probability of condensation contact between the desorbed atmosphere (water vapor) and the lower conical body, fully condense the moisture in the atmosphere, and increase the output of condensed water.

[0029] According to any embodiment of the first aspect of the present invention, the opening and closing assembly includes a motor and a crank connecting rod, the motor is fixed on the inner side of the accommodating cavity, one end of the crank connecting rod is connected to the motor, and the other end is connected to the cover plate to realize the opening and closing of the vent for ventilation at night.

[0030] According to any embodiment of the first aspect of the present invention, the extension length of the fin in the accommodating cavity is greater than the extension length of the MIL-101 (Cr) material, so that the moisture-containing atmosphere can be diverted along the protruding portion, thereby allowing the moisture in the atmosphere to be evenly adsorbed by the MIL-101 (Cr) material.

[0031] According to any embodiment of the first aspect of the present invention, the water collection module includes a water reservoir, a centrifugal pump, and a condenser; the lower conical body is connected to the water reservoir via a pipe; the centrifugal pump is connected to the condenser via a pipe, capable of transporting seawater into the condenser; the lower conical body has an interlayer, and the condenser is arranged in a serpentine shape within the interlayer and contacts the inner surface of the interlayer. The condenser elbow surrounds the outer surface of the condenser at a 90-degree angle, has an outer cross-section of 0.2m×0.15m, and an inner cross-section of 0.15m×0.1m, and the centrifugal pump is electrically connected to the energy storage module.

[0032] According to any embodiment of the first aspect of the present invention, the bottom of the lower conical body is tilted downward at a 45° angle to the horizontal plane, and the entire body is in a pyramidal shape, which is conducive to the collection of condensed water.

[0033] According to any embodiment of the first aspect of the present invention, an insulation layer is provided on the outer side of the lower conical body. The low-temperature inner surface of the lower conical body will cause the water vapor in the atmosphere to liquefy when cooled to form condensed water, and the insulation layer can keep the temperature of the interlayer stable and higher than the dew point temperature of the atmosphere, thereby avoiding condensation and providing physical protection for the square condenser tube to prevent it from being affected by external environmental factors.

[0034] According to any embodiment of the first aspect of the present invention, the insulation layer is made of polyurethane with a thermal conductivity of 0.018 W / (m·k) to 0.025 W / (m·k).

[0035] According to any embodiment of the first aspect of the present invention, the inner surface of the inner layer of the lower conical body is coated with a hydrophobic layer, and the hydrophobic layer is made of polytetrafluoroethylene (PTFE). The advantages of using a hydrophobic material, and polytetrafluoroethylene (PTFE) are: extremely strong hydrophobicity, which can effectively prevent moisture adhesion and facilitate the collection of condensed water; extremely low surface friction coefficient and excellent chemical stability, and is almost not corroded by any chemical substances.

[0036] According to any embodiment of the first aspect of the present invention, the energy storage module is a battery, a lithium battery, a lead-acid battery, etc.; preferably, the battery is a nickel-metal hydride battery with an energy / weight of 60 to 120 Wh / kg (watt-hours / kilogram).

[0037] According to any embodiment of the first aspect of the present invention, the upper square body is a square with a length, width and height of 1m×1m×1m respectively, and the lower conical body has a length, width and height of 1m, 1m respectively. The lower conical body is inclined downward at a 45° angle to the horizontal plane, and the whole body is in the shape of a pyramid.

[0038] According to any embodiment of the first aspect of the present invention, the water reservoir is a rectangular parallelepiped with a length, width and height of 1 m, 2 m and 1 m respectively.

[0039] According to any embodiment of the first aspect of the present invention, the power generation module is not fixed to the box body and is a detachable structure, so the system is flexible, the device is handy, and it is easy to move.

[0040] According to any embodiment of the first aspect of the present invention, the condenser tube adopts C70600 copper tube (white copper tube), which has excellent seawater corrosion resistance and can ensure long-term application in seawater transportation operations. At the same time, it still maintains a relatively high thermal conductivity coefficient and can effectively transfer heat, which can help seawater accelerate the cooling wall speed, thereby accelerating the attachment of condensed water to its surface and accelerating the collection of water resources.

[0041] The heat transfer mechanism of the power generation module of the present invention is as follows:

[0042] 1) Utilizing the temperature difference between day and night to improve efficiency: During the day, the ventilation openings of the entire device are sealed, creating a closed internal environment that helps maintain stable and concentrated heat. This improves the efficiency of heat transfer between components and overall operating efficiency. The photovoltaic panels (PV) on the top efficiently absorb solar energy under sunlight and convert it into electricity to meet the daily electricity needs of island residents. Excess electricity is stored in batteries for backup and ensures power supply at night.

[0043] 2) The waste heat generated by photovoltaic panels is converted into electricity by thermoelectric generation modules (TEGs) to achieve secondary power generation. The TEG module uses the temperature difference between the photovoltaic panel and the MIL-101(Cr) material to generate electricity and transmit it to the battery through a connecting circuit. Inside the battery, the electricity is stored as chemical energy to ensure a stable power supply, avoid power shortages or overloads, and improve energy utilization efficiency. The electricity generated by the temperature difference can be stored, reducing power curtailment and allowing this energy to be more fully utilized. The remaining heat is transferred to the MIL-101(Cr) material through the thermal conductive sheet, providing a stable temperature environment for water condensation. At the same time, the thermal conductive sheet helps dissipate heat from the photovoltaic panel, reducing the temperature of the photovoltaic panel and improving power generation efficiency.

[0044] 3) At night, the MIL-101(Cr) material exhibits its hygroscopic properties; during the day, rising temperatures promote moisture desorption from the material. The interlayer is equipped with a condenser connected to a seawater centrifugal pump, which in turn is connected to a battery. The pump uses the battery's electricity to pump seawater, accelerating the temperature drop on the inner surface of the lower cone, thereby facilitating the collection of condensed water. In this way, moisture released from the MIL-101(Cr) material continuously contacts the condensation surface coated with hydrophobic polytetrafluoroethylene (PTFE) within the enclosure, condensing into liquid water. This water then flows into the water storage area, ultimately achieving the goal of collecting atmospheric moisture. During the day, the system integrates photovoltaic power generation, TEG thermoelectric conversion, and MIL-101(Cr) water condensation, significantly improving solar energy utilization. This system not only provides electricity but also water, achieving a dual supply of both energy and water, effectively meeting diverse resource needs.

[0045] 3. Beneficial effects

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) The device of the present invention has a lower conical body that is not only conducive to the collection of condensed water, but also, when used during the day, the vent is closed by the cover plate to construct a relatively closed internal environment (the bottom is connected to the water reservoir of the water collection module, which is equivalent to a bottom seal), which is conducive to maintaining heat stability and concentration, thereby improving the heat transfer efficiency between the components and the overall operating efficiency. In addition, the space of the upper square body is larger than the space of the lower conical body. During the day, the cold air entering through the gap first meets the hot air (water vapor) and then, under the action of disturbance, enters the small space at the bottom from the large space at the top, thereby increasing the collision of water molecules in the atmosphere. Compared with the existing technology, the condensation and water collection efficiency of the present invention is effectively improved.

[0048] (2) The TEG power generation mode of the present invention makes up for the limitation of solar energy that cannot generate electricity at night, realizes 24-hour power supply, and further enhances the practicality of the device; MIL-101 (Cr) material efficiently absorbs and releases moisture, has a strong ability to capture atmospheric water, and has a strong ability to produce fresh water with high efficiency;

[0049] Compared with seawater desalination, atmospheric water collection is not restricted by geographical location; atmospheric water has low salt content and does not require evaporation and desalination, the process is simple and energy consumption is reduced;

[0050] The present invention is relatively more stable and safe when placed on an island compared to the sea surface, making it convenient for personnel to regularly visit and manage and maintain the equipment. Furthermore, the location is close to the sea, making it easier to obtain seawater for water cooling, which can reduce the construction costs of supporting facilities such as seawater transportation to a certain extent. Furthermore, the use of seawater to cool the lower conical body saves a lot of cooling costs compared to using coolants. Seawater has a high specific heat capacity and can effectively absorb the heat of the lower conical body, keeping it at a suitable low temperature, which is conducive to the rapid condensation of gaseous water and achieves a good cooling effect.

[0051] (3) The present invention creatively integrates photovoltaic, thermoelectric power generation and MIL-101(Cr) atmospheric water extraction (PV-TEG-MOFs) to achieve dual supply of electricity and water resources, while solving the major problems of power generation and water consumption on islands. Compared with traditional diesel power generation and seawater desalination, the present invention significantly reduces dependence on external energy, reduces transportation costs, improves the stability of energy supply, and is conducive to reducing carbon emissions and protecting the fragile ecosystem of islands.

[0052] (4) The system of the present invention is flexible and does not require other energy input. The system converts solar energy and temperature difference potential energy into electrical energy. At the same time, electrical equipment such as water pumps / centrifugal pumps can be added to directly utilize the electricity generated by the TEG power generation module to extract seawater, thereby accelerating the cooling of the outer surface of the lower cone body, realizing the integration of water extraction and power generation. At the same time, the device is flexible and easy to move, and its position can be flexibly adjusted according to actual conditions to obtain the best power generation and water extraction effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale.

[0054] Figure 1 This is a schematic structural diagram of the integrated water extraction and power generation device for remote islands of the present invention; Figure 2 A diagram of the use of the invented integrated water extraction and power generation device for remote islands; Figure 3 This is another usage state diagram of the invented integrated water extraction and power generation device for remote islands; Figure 4 It is a structural schematic diagram of the power generation module of the present invention; Figure 5 It is a structural schematic diagram of the water collection device of the present invention; Figure 6 It is a structural schematic diagram of a cross section of the condenser tube device of the present invention; Figure 7 This is a schematic diagram of the automatic opening and closing mechanism of the present invention; Figure 8 To show the desorption moisture content test results of the MIL-101(Cr) material used in the device of the present invention; Figure 9 To show the performance test results of the device of the present invention using MIL-101 (Cr) material; (a) X-ray diffraction (XRD); (b) adsorption-desorption isotherm; (c) thermal conductivity test; (d) water absorption isotherm; (e) water absorption test; (f) cyclic stability test; Figure 10 To show the changes in temperature, power density and voltage of the device of the present invention at night and during the day; Figure 11 To represent the average annual photovoltaic power generation of some cities; Description of reference numerals: 1. Box body; 11. Upper square body; 111. Accommodation cavity; 112. Ventilation port; 113. Cover plate; 114. Motor; 115. Crank connecting rod; 12. Lower conical body; 121. Interlayer; 122. Insulation layer; 123. Hydrophobic layer; 2. Power generation module; 21. Photovoltaic module; 22. Thermoelectric power generation module; 221. Upper surface; 23. Adsorption module; 231. Fin; 232. MIL-101 (Cr) material; 3. Water collection module; 31. Water reservoir; 32. Centrifugal pump; 33. Condensation pipe; 4. Battery. DETAILED DESCRIPTION

[0055] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0056] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and objectives that can be achieved by the present invention.

[0057] At the same time, the terms such as "upper", "lower", "left", "right", and "middle" cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0058] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0059] The photovoltaic (PV) components, thermoelectric generation (TEG) components, battery 4, motor 114, crank connecting rod 115, polyurethane, condenser 33, centrifugal pump 32, etc. used in this embodiment are all commercially available products.

[0060] See also Figures 1 to 7 As shown, the integrated water-taking and power-generating device for remote islands of the present invention comprises a housing 1, a power generation module 2, a water collection module 3 and an energy storage module.

[0061] Among them, such as Figure 1 and Figure 2 As shown, the box body 1 includes an upper square body 11 and a lower conical body 12. In this embodiment, the upper square body 11 is a square with a length, width and height of 1m×1m×1m respectively, and the lower conical body 12 is a square with a length, width and height of 1m, 1m respectively. The lower conical body 12 maintains a downward inclination angle a with the horizontal plane, wherein the inclination angle a is 30°, 45°, 60°, preferably 45°, and the whole body is in the shape of a pyramid.

[0062] Furthermore, the upper square body 11 has a accommodating cavity 111, and a vent 112 is provided on one side of the accommodating cavity 111 for the entry of moisture-containing atmosphere. The vent 112 is provided with a cover plate 113 that cooperates with it. The cover plate 113 is configured with an opening and closing assembly that can be opened and closed, and the energy storage module is electrically connected to the opening and closing assembly.

[0063] In some embodiments of the present invention, Figure 5As shown, a structure of an opening and closing assembly is provided, which includes a motor 114 and a crank connecting rod 115. The motor 114 is fixed on the inner side of the accommodating chamber 111. One end of the crank connecting rod 115 is connected to the motor 114, and the other end is connected to the cover plate 113, so as to realize the opening and closing of the vent 112 within the range of 0-90 degrees, which is used for ventilation at night. In actual use, due to the interference between the cover plate and the power generation module, an opening of 90 degrees is generally not achieved.

[0064] The motor 114 is powered by the electricity generated by the photovoltaic module 21 and the thermoelectric generation module 22. The motor 114 is closed during the day and opened at night for ventilation.

[0065] exist Figure 1 、 Figure 2 and Figure 3 In the figure, the power generation module 2 is placed on the box 1, which includes a photovoltaic (PV) component, a thermoelectric power generation (TEG) component and an adsorption component 23 connected to the lower end surface of the thermoelectric power generation component 22. It can transfer the residual heat of the thermoelectric power generation component 22 to the MIL-101 (Cr) material 232 through the fins 231, providing a stable temperature environment for moisture condensation. At the same time, the fins 231 help the photovoltaic panel to dissipate heat, reduce the temperature of the photovoltaic panel, and improve the heat dissipation area of ​​the power generation efficiency.

[0066] Furthermore, the photovoltaic module 21 is arranged on the upper surface 221 of the thermoelectric power generation module 22, with its front side facing the sunlight and absorbing solar energy, and its back side in contact with the thermoelectric power generation module 22 ( Figure 2 and Figure 3 The thermoelectric power generation assembly 22 is used to convert the waste heat generated by the photovoltaic panel into electrical energy.

[0067] Among them, the adsorption component 23 includes a plurality of fins 231 (the material of the fins is a heat-conducting metal, such as aluminum alloy, copper sheet, etc.), the fins 231 are arranged in parallel in the accommodating cavity 111 and face the vent 112, the fins 231 are loaded with MIL-101 (Cr) material 232, and the MIL-101 (Cr) material 232 of two adjacent fins 231 are in contact, so that the MIL-101 (Cr) material 232 can adsorb atmospheric moisture entering the accommodating cavity 111 through the vent 112.

[0068] The above-mentioned adsorption component 23 uses MIL-101 (Cr) material with a moisture desorption rate of 86.67 mL / (kg·h) per 10 g of material. 20 g is evenly loaded on the surface of the fin 231 of the rectangular MIL-101 (Cr) material 232 with a size of 0.9 m×0.9 m.

[0069] The above-mentioned photovoltaic assembly 21 is used for power generation and heat collection during the day / radiation cooling process at night and the synergistic effect of dehumidification and heat absorption / heat release of MIL-101(Cr) ((metal-organic frameworks, MOFs)) material. In the box 1, the MIL-101(Cr) material 232 adsorbs and desorbs water vapor, and the water vapor contacts the inner surface of the lower conical body 12 to condense to form liquid water without forming water droplets. Under the action of gravity, the liquid water flows downward to realize the collection of condensed water; the power generation module 2 utilizes the environmental differences between day and night and is designed with two day and night operation modes to achieve the multifunctional synergistic effect of solar power generation, thermoelectric conversion and atmospheric moisture collection, thereby maximizing the system's energy and water resource output.

[0070] Specifically, place the fin 231 flat in the ceramic box and perform the following operations in sequence:

[0071] (1) Evenly spread a MIL-101 (Cr) powder layer on the fin 231;

[0072] (2) Add sodium silicate solution to the MIL-101(Cr) powder layer at a ratio of 10% by weight of the powder until a viscous paste is formed;

[0073] (3) Repeating steps (1) and (2) layer by layer, the MIL-101 (Cr) material 232 is compounded on the surface of the fin 231 to achieve uniform coverage;

[0074] (4) The fin 231 loaded with the MIL-101(Cr) material 232 is transferred to an electric constant temperature blast drying oven and dried at a constant temperature of 100° C. for 12 hours to ensure that the MIL-101(Cr) material 232 is completely cured and shaped.

[0075] It should be noted that the above-mentioned MOFs material uses MIL-101 (Cr) material 232, which has a strong adsorption effect on water molecules, and can distinguish water molecules from strange gas molecules to a certain extent, preferentially adsorbing water vapor, achieving efficient atmospheric moisture capture and improving the efficiency and purity of water extraction. At the same time, it has the characteristics of good thermal stability, adjustability and strong environmental adaptability.

[0076] exist Figure 1 、 Figure 6 and Figure 7In the embodiment, the water collection module 3 is placed below the housing 1 to collect condensed water. Specifically, the water collection module 3 includes a water reservoir 31, a centrifugal pump 32, and a condenser pipe 33. The lower conical body 12 is connected to the water reservoir 31 via a pipe. The centrifugal pump 32 is connected to the condenser pipe 33 via a pipe, capable of transporting seawater into the condenser pipe 33. The lower conical body 12 has an interlayer 121, and the condenser pipe 33 is arranged in a serpentine shape within the interlayer 121 and contacts the inner surface of the interlayer 121.

[0077] In this embodiment, the condensation elbow surrounds the condensation outer surface at 90 degrees, with an outer cross-section of 0.2m×0.15m and an inner cross-section of 0.15m×0.1m. The seawater centrifugal pump 32 is electrically connected to the energy storage module.

[0078] In order to keep the temperature of the interlayer 121 stable and higher than the dew point temperature of the atmosphere, thereby avoiding condensation and providing physical protection for the square condenser tube 33 to prevent it from being affected by external environmental factors, an insulation layer 122 is provided on the outside of the lower conical body 12. The material of the insulation layer 122 is polyurethane with a thermal conductivity coefficient between 0.018W / (m·k) and 0.025W / (m·k), such as commercially available polyurethane. The low temperature surface of the lower conical body 12 will cause the water vapor in the atmosphere to be cooled and liquefied to form condensed water.

[0079] like Figure 6 As shown, the inner surface of the lower conical body 12 is coated with a hydrophobic layer 123. The material of the hydrophobic layer 123 is preferably polytetrafluoroethylene (PTFE). The advantages of using a hydrophobic material and polytetrafluoroethylene (PTFE) are: extremely hydrophobicity, which can effectively prevent moisture adhesion and facilitate the collection of condensed water; it has an extremely low surface friction coefficient and excellent chemical stability, and is almost not corroded by any chemical substances. Furthermore, the condenser pipe 33 has a seawater inlet connected to the seawater centrifugal pump 32; a seawater outlet for directly draining the condensed seawater into the sea; the seawater centrifugal pump 32 is used to transport seawater; and a water reservoir 31 is used to collect condensed water.

[0080] In this embodiment, the energy storage module is connected to the power generation module 2 to collect and store the electric energy converted by the thermoelectric power generation component 22 and the photovoltaic component 21; the energy storage module is a battery 4, a lithium battery, a lead-acid battery, etc.; preferably, the battery 4 is a nickel-metal hydride battery 4 with an energy / weight of 60 to 120 Wh / kg (watt-hours / kilogram).

[0081] The inventors surprisingly found that in order to speed up the flow of desorbed gas, the upper end of the cover plate 113 is rotatably connected to the upper square body 11 through a rotating shaft, and the four sides of the cover plate 113 are clearance-matched with the edge of the vent 112, and the size of the gap is 0.01-0.1mm. When the device of the present invention is in use, during the day, sunlight irradiates the photovoltaic module 21, and through heat transfer, the temperature of the fins 231 rises and dissipates heat into the accommodating cavity 111, so that the upper part of the accommodating cavity 111 accumulates hot air (water vapor). At this time, the hot air (water vapor) in the accommodating cavity 111 and the cold air from the outside are fully utilized, and the cold air ( Figure 2 The arrow outside the middle box) enters the accommodating chamber 111, and the cold and hot air meet, forming a local atmospheric disturbance ( Figure 2 and Figure 3 The arrow in the box body can improve the contact probability between the desorbed atmosphere and the lower conical body 12, shorten the condensation time, and fully condense the moisture in the atmosphere, thereby increasing the output of condensed water.

[0082] exist Figure 3 In the embodiment, the extension length of the fin 231 in the accommodating cavity 111 is greater than the extension length of the MIL-101 (Cr) material 232, that is, the height difference between the two is H. The value of H can be designed according to the size of the box body 1, so that the moisture-containing atmosphere entering through the vent 112 can be diverted along the protruding part, and the moisture in the atmosphere can be evenly adsorbed by the MIL-101 (Cr) material 232, thereby effectively improving the use efficiency of the MIL-101 (Cr) material 232.

[0083] See also Figure 8 and Figure 9 The figure shows the results of various performance tests of the device of the present invention using MIL-101 (Cr) material 232. In this embodiment, the photovoltaic module 21 is a PV photovoltaic cell with a power density of 120W / m 2 The water-absorbing material is MIL-101(Cr) material 232, and its water desorption rate reaches 86.67mL / (kg·h), which can desorb about 2.5mL of water.

[0084] (9-a) At the same time, scanning electron microscopy and digital photos showed that the MIL-101(Cr) particles were regular octahedral in shape with perfect symmetry and were evenly distributed on the fins, indicating that the synthesized material had a good crystal structure;

[0085] (9-b) Adsorption / desorption isotherm images of BET surface areas up to 2000 m2·g -1 The average pore size is 2.38nm, reflecting high water adsorption capacity;

[0086] (9-c) Compared with the lower thermal conductivity of MIL-101(Cr) powder (0.15 W·m -1 ·K -1 ) compared with the fin composite, it showed a higher thermal conductivity (1.92W·m -1 ·K -1 );

[0087] (9-d) The material has ideal and rapid water adsorption performance at 25 °C, and the water adsorption at different temperatures and relative humidity demonstrates its flexible adaptability;

[0088] (9-e) Under constant temperature and humidity test conditions, the material's equilibrium capacity for water adsorption at constant temperature increases with increasing relative humidity;

[0089] (9-f) The research results show that the water absorption rate is negatively correlated with the working temperature, which provides a good basis for the application of moisture absorption materials at night and desorption materials during the day in buildings.

[0090] In addition, the present invention has carried out multiple adsorption / desorption cycles on the material, and the adsorption capacity is about 0.91g·g -1 , indicating that the composite material has excellent cyclic stability.

[0091] See also Figure 10 , the figure shows the temperature, voltage or power density change curve in night / day mode. In some embodiments of the invention, the outer surface of the upper square body of the device of the present invention is provided with a heat-insulating material polyurethane, which can separate the condensation environment from the outside world, protect the heat generated after the condensation of water, and realize the capture and desorption of water in a cycle. The inner surface of the lower conical body 12 is a hydrophobic material polytetrafluoroethylene (PTFE), and the inner surface cools the moisture in the atmosphere and condenses it into liquid water, which eventually flows into the water storage area, thereby achieving the purpose of collecting atmospheric moisture; the outer surface has a square condenser tube 33 in direct contact with it, which accelerates the cooling of the condensation outer surface temperature, so that water vapor is more quickly adsorbed on the condensation inner surface, thereby accelerating the collection of condensed water.

[0092] In this embodiment, the device is externally connected to a battery 4. The TEG assembly converts solar energy into electrical energy and also converts waste heat from the photovoltaic panels 21 into secondary electrical energy, which is collected and stored by the battery 4 for nighttime lighting. The device directly uses the electricity converted by the TEG assembly to operate a water pump that transports seawater as a condensing medium. In daily life, seawater is relatively cool and is discharged directly from the device through the square pipe, making it reusable.

[0093] See also Figure 11,The figure shows the average annual photovoltaic power generation of some cities.,In the embodiment of the present invention, the coverage area of ​​the system should be approximately 1,000 square meters,,which can generate about 200 kWh of electricity, which can meet the daily basic power needs on the island,,including daily lighting, communication equipment and infrastructure operation.

[0094] Furthermore, the lower conical body 12 not only facilitates the collection of condensed water, but also, during daytime use, the vents 112 are sealed by the cover plate 113 to create a relatively closed internal environment, which helps maintain stable and concentrated heat, improves the efficiency of heat transfer between components, and consequently improves overall operating efficiency. Furthermore, the space in the upper square body 11 is larger than that in the lower conical body 12. During the day, the cold air entering through the gap first meets the hot air (water vapor) and, under the effect of disturbance, enters the smaller space below from the larger space above, increasing the collision of water molecules in the atmosphere. As demonstrated by a large amount of experimental data, the condensation and water collection efficiency of the present invention has been improved by at least 10%.

[0095] Compared to existing water collection devices, the present invention can collect 718.75 liters of fresh water per day, which can support the basic living water needs of approximately 350-480 people. By comparison, the inventors have designed an interference fit (sealed) around the perimeter of the cover plate 113 and the edge of the vent 112, preventing internal disturbances and extending the time it takes for water to condense.

[0096] By adopting the above technical solution, the operating mechanism of the device is as follows:

[0097] During daytime mode, the system maintains a closed internal environment by closing vents 112, keeping the internal heat stable and concentrated, and improving heat transfer efficiency between modules. The photovoltaic panels (PV) on the roof efficiently absorb solar energy and convert it into electricity. This energy is used to meet daily power needs, while excess energy is stored for backup and nighttime operation.

[0098] Excess heat generated by the photovoltaic panels during power generation is further converted into electricity through the thermoelectric generation assembly 22 (TEG module), achieving secondary power generation. The TEG assembly utilizes the temperature difference between the photovoltaic panels and the MIL-101(Cr) material 232 to generate electricity. This electricity is transmitted through a connecting circuit to the battery 4, where it is stored as chemical energy. This ensures a stable power supply, avoids power shortages or overloads, and improves overall energy conversion efficiency. Excess heat is transferred to the MIL-101(Cr) material 232 via thermal fins 231, creating stable temperature conditions for moisture condensation. Furthermore, the thermal fins 231 facilitate heat dissipation from the photovoltaic panels, enabling them to maintain higher power generation efficiency at lower temperatures.

[0099] After the MIL-101(Cr) material 232 absorbs moisture at night, rising daytime temperatures promote its desorption process. The lower conical body 12 at the lower end of the MIL-101(Cr) features a condensation hydrophobic layer 123. When the MIL-101(Cr) material 232 releases moisture, it contacts the condensation surface coated with the hydrophobic polytetrafluoroethylene (PTFE) material to form liquid water without forming droplets. Under the influence of gravity, the liquid water flows downward into the reservoir, achieving the purpose of collecting atmospheric moisture. In daytime mode, the system significantly improves the efficiency of solar energy utilization through the triple functions of photovoltaic power generation, TEG thermoelectric conversion, and MIL-101(Cr) moisture condensation, while simultaneously achieving a dual supply of electricity and water resources.

[0100] At night, motor 114 uses the energy stored in battery 4 to automatically open vent 112 to promote air circulation. Cold air enters chamber 111 and contacts the surface of MIL-101(Cr) material 232. Due to the lower nighttime temperatures, MIL-101(Cr) material 232 has a higher hygroscopicity at low temperatures, actively absorbing water molecules from the atmosphere and accumulating moisture for the next day's condensation process. The hygroscopic properties of MIL-101(Cr) material 232 at night allow it to capture atmospheric humidity, effectively releasing it during daytime heat, ensuring the device's stable water collection capacity.

[0101] Furthermore, TEG components can maintain low-light illumination and the operation of low-power devices at night, meeting basic nighttime power needs. Excess daytime electricity is used by the energy storage module to support the TEG components' low-light illumination function at night, enabling the device to achieve low-power illumination and provide nighttime illumination, increasing the system's practicality and safety. This efficient day-night collaboration not only provides a continuous supply of energy and water resources, but also provides nighttime illumination, effectively improving quality of life.

[0102] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An integrated water extraction and power generation device for remote islands, comprising: The box body (1) comprises an upper square body (11) and a lower conical body (12); A power generation module (2) is placed on the box (1), the power generation module (2) comprising a photovoltaic component (21) and a thermoelectric power generation component (22), the photovoltaic component (21) being arranged on an upper surface (221) of the thermoelectric power generation component (22), with its front side facing the direction of sunlight and absorbing solar energy, and its back side in contact with the thermoelectric power generation component (22); A water collection module (3) disposed below the box (1) and used for collecting condensed water; and an energy storage module connected to the power generation module (2), for collecting and storing the electric energy converted by the thermoelectric power generation component (22) and the photovoltaic component (21); characterized in that: The upper square body (11) has a receiving cavity (111), a vent (112) for allowing moisture-containing air to enter is provided on one side of the receiving cavity (111), a cover plate (113) cooperating therewith is provided on the vent (112), the cover plate (113) is provided with an opening and closing assembly capable of being opened and closed, and the energy storage module is electrically connected to the opening and closing assembly; The power generation module (2) further comprises an adsorption component (23) connected to the lower end surface of the thermoelectric power generation component (22), the adsorption component (23) comprising a plurality of fins (231), the fins (231) being arranged in parallel in the accommodating cavity (111) and facing the vent (112), the fins (231) being loaded with MIL-101 (Cr) material (232), and the MIL-101 (Cr) material (232) surfaces of two adjacent fins (231) being in contact, so that the MIL-101 (Cr) material (232) can adsorb atmospheric moisture entering the accommodating cavity (111) through the vent (112).

2. The integrated water extraction and power generation device for remote islands according to claim 1, characterized in that: The upper end of the cover plate (113) is hingedly connected to the upper square body (11), and the periphery of the cover plate (113) is clearance-matched with the edge of the vent (112).

3. The integrated water extraction and power generation device for remote islands according to claim 2, characterized in that: The opening and closing assembly comprises a motor (114) and a crank connecting rod (115); the motor (114) is fixed inside the accommodating cavity (111); one end of the crank connecting rod (115) is connected to the motor (114), and the other end is connected to the cover plate (113), thereby realizing the opening and closing of the vent (112).

4. The integrated water extraction and power generation device for remote islands according to any one of claims 1 to 3, characterized in that: The extension length of the fin (231) in the accommodating cavity (111) is greater than the extension length of the MIL-101 (Cr) material (232), so that moisture-containing air can be guided along the protruding portion.

5. The integrated water extraction and power generation device for remote islands according to claim 4, characterized in that: The water collection module (3) comprises a water reservoir (31), a centrifugal pump (32) and a condenser (33); the lower conical body (12) is connected to the water reservoir (31) via a pipeline; the centrifugal pump (32) is connected to the condenser (33) via a pipeline and can transport seawater to the condenser (33); the lower conical body (12) has an interlayer (121), and the condenser (33) is arranged in a serpentine shape in the interlayer (121) and contacts the inner surface of the interlayer (121).

6. The integrated water extraction and power generation device for remote islands according to claim 5, characterized in that: The bottom of the lower conical body (12) maintains a downward inclination angle of 45° with the horizontal plane, and the whole body is in a pyramid shape.

7. The integrated water extraction and power generation device for remote islands according to claim 6, characterized in that: A heat-insulating layer (122) is provided on the outer side of the lower conical body (12).

8. The integrated water extraction and power generation device for remote islands according to claim 7, characterized in that: The material of the thermal insulation layer (122) is polyurethane with a thermal conductivity between 0.018 W / (m·k) and 0.025 W / (m·k).

9. The integrated water extraction and power generation device for remote islands according to claim 7, characterized in that: The inner surface of the inner layer of the lower conical body (12) is coated with a hydrophobic layer (123), and the material of the hydrophobic layer (123) is hydrophobic polytetrafluoroethylene.

10. The integrated water extraction and power generation device for remote islands according to claim 1, characterized in that: The energy storage module is a storage battery (4); the storage battery (4) is a nickel-hydrogen storage battery with an energy / weight of 60 to 120 Wh / kg.

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