A dual-source power generation device combining raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets.

Abstract

This invention belongs to the field of new energy and renewable energy development technology, and relates to a dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets. It includes: a housing, a droplet power generation array, a condensation chamber, and an energy storage and monitoring system disposed inside the housing, and a photovoltaic composite panel disposed on the top of the housing; the droplet power generation array includes a support plate disposed inside the housing and multiple droplet power generation units, which are arranged in an array on the upper surface of the support plate; the photovoltaic composite panel is movably connected to the housing; the photovoltaic composite panel is a composite panel composed of a photovoltaic panel, a heat-conducting plate, and a fiber layer; the heat-conducting plate is disposed between the photovoltaic panel and the fiber layer; the energy storage and monitoring system is electrically connected to the droplet power generation array and the photovoltaic panel respectively, and is also electrically connected to an external energy storage device or load. This invention alleviates the technical problems of low energy conversion efficiency and poor all-weather stability existing in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of new energy and renewable energy development technology, and relates to a dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, condensation, and dripping water. Background Technology

[0002] With the continuous growth of global energy demand and increasing emphasis on environmental protection, the development and utilization of renewable energy has become a key development direction in the world's energy sector. Among numerous renewable energy sources, solar, wind, and hydropower have been widely researched and applied. In recent years, raindrop energy, as an emerging energy form, has gradually attracted the attention of researchers. Global annual precipitation is enormous, and the kinetic energy contained within raindrops has considerable development potential. At the same time, atmospheric water vapor is also a resource that has not yet been fully utilized. Collecting and converting it into usable energy through effective technological means is of great significance for achieving diversified energy supply.

[0003] In the field of droplet power generation technology, there have been some related research results and application attempts. For example, some research teams have developed devices based on single droplet power generation, improving power generation efficiency by optimizing the hydrophobicity of the material surface and the electrode structure. However, such devices have obvious technical drawbacks: on the one hand, the randomness of raindrop falling leads to unstable frequency of droplet impact on the electrodes, resulting in large fluctuations in the device's energy output and making it impossible to achieve a continuous and stable power supply; on the other hand, the kinetic energy carried by a single droplet is limited, and even with optimized power generation structure, the overall power output of the device remains low, making it difficult to meet the demand for continuous and stable power supply in practical applications.

[0004] Furthermore, for the problem of water supply through droplet power generation during non-rainy periods, existing technologies often rely on complex mechanical structures or external energy inputs to achieve water recycling. This not only increases the cost and complexity of the system but also reduces its reliability and stability. Regarding atmospheric water collection, some studies have employed high specific surface area adsorbent materials (such as silica gel and metal-organic frameworks) to collect moisture from the air. However, further improvements are needed in adsorption-desorption efficiency, water collection speed, and synergy with power generation systems. For example, some adsorbent materials require high temperatures (e.g., some silica gel materials need to be heated to 80-120℃) or large energy inputs during desorption, which may be limited by energy supply in practical applications.

[0005] Furthermore, existing technologies combining droplet power generation and photovoltaic power generation simply physically connect the two power generation devices without achieving deep integration of energy harvesting, resource utilization, and system control. For example, patent CN116191986A discloses a raindrop-solar power generation integrated device based on multi-channel millifluidic control, including a water collection tank, a delivery pipeline, a flow limiting valve, a multi-channel millifluidic control chip, a solar array panel, and a triboelectric nano-power generation component. The multi-channel millifluidic control chip has fluid microchannels inside, with superhydrophobic sections at their ends, used to convert rainwater into droplets of controllable size, positioned directly above the solar array panel. The triboelectric nano-power generation component includes an upper electrode layer, a dielectric layer, and a base electrode layer. The base electrode layer covers the upper surface of the solar array panel. This patent improves power generation efficiency and the uniformity of the generated electrical signal by controlling the droplet size. However, this device relies solely on the solar panel for power generation when there is no rain, and its overall power generation capacity is greatly affected by weather conditions.

[0006] In summary, existing methods of combining droplet power generation with photovoltaic power generation mostly rely on rainwater or water tanks for liquid supply, and the power generation time window is significantly limited by the environment, requiring further innovation and improvement. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art by providing a dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets.

[0008] The objective of this invention can be achieved through the following technical solutions: A dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets includes: a housing, a droplet power generation array, a condensation chamber, and an energy storage and detection system disposed inside the housing, and a photovoltaic composite panel disposed on the top of the housing; wherein, the condensation chamber is disposed at the top of the housing; and the droplet power generation array is disposed below the condensation chamber. The photovoltaic composite panel is movably connected to the housing; the photovoltaic composite panel includes a photovoltaic panel, a heat-conducting plate, and a fiber layer; the heat-conducting plate is disposed between the photovoltaic panel and the fiber layer; The energy storage detection system is electrically connected to the droplet power generation array and the photovoltaic panel, respectively. The energy storage detection system is also electrically connected to external energy storage devices or loads.

[0009] Furthermore, the droplet power generation array includes a support plate and multiple droplet power generation units, which are arranged in an array on the upper surface of the support plate. Preferably, they are arranged in a staggered pattern. The droplet power generation units are inclined. Preferably, the inclination angle of the droplet power generation units is 30~60°, more preferably 45°. When the inclination angle is too small (less than 30°), droplets tend to linger on the surface and are difficult to slide and gather smoothly, which is not conducive to forming stable droplet kinetic energy. When the inclination angle is too large (greater than 60°), the droplet sliding speed is too fast, which can easily lead to deviation or splashing, reducing the controllability of droplet falling and the triggering stability of the power generation unit. Therefore, the angle range of 30~60°, especially 45°, allows droplets to slide more stably along the surface, gather and fall into the power generation unit, improving the droplet kinetic energy utilization efficiency, while reducing adverse factors such as droplet lingering, deviation or splashing, thereby improving the overall power generation effect and operational reliability of the droplet power generation array. Meanwhile, this tilt angle can take into account the arrangement density of the droplet power generation array, effectively avoiding the problems of height difference and mutual shading between array units caused by excessive angle, and providing structural adaptability support for array layout.

[0010] Furthermore, the droplet power generation unit includes a bottom electrode, an intermediate triboelectric layer, and a top electrode; the bottom electrode includes an indium tin oxide electrode, the intermediate triboelectric layer includes a fluoroethylene propylene copolymer electrode layer, and the top electrode includes an aluminum foil electrode; a superhydrophobic coating is sprayed onto the upper surface of the intermediate triboelectric layer; and the top electrode is disposed on one side of the intermediate triboelectric layer.

[0011] Furthermore, the heat-conducting plate includes an aluminum plate; the fiber layer includes an activated carbon fiber layer.

[0012] Furthermore, the activated carbon fiber layer is a modified activated carbon fiber material prepared by sequentially impregnating silica sol and lithium chloride solution after drying and dehumidification, followed by drying. Silica sol is used to form a porous, cured structure on the fiber surface to increase the fiber's specific surface area; lithium chloride, as a strong hygroscopic salt, significantly increases the fiber's water absorption and lowers the desorption temperature. The impregnation time is set according to the fiber's liquid saturation level to achieve uniform lithium chloride loading; after drying and curing, the porous network formed by the silica sol and the distribution of lithium chloride are stabilized.

[0013] Furthermore, multiple condensing fins are symmetrically arranged on both sides of the condensing chamber.

[0014] Furthermore, the condenser fins comprise aluminum fin structures with alternating hydrophilic and hydrophobic stripe structures on their surface; multiple aluminum fin structures are arranged in parallel at equal intervals. This predetermined equal spacing between adjacent aluminum fins aims to achieve an optimized balance between condensation efficiency, airflow resistance, and condensate drainage stability. It avoids both airflow channel blockage due to excessively small spacing and insufficient effective condensation area due to excessively large spacing, thereby ensuring stable droplet formation and dripping within the intended area, significantly improving the overall power generation efficiency and operational reliability of the device. Preferably, the spacing between adjacent fins is 3–7 cm.

[0015] Hydrophilic and hydrophobic stripe structures are arranged alternately with millimeter-level widths. Experimental results show that when the width of the superhydrophobic region is controlled within the range of 0.65–0.95 mm and the width of the superhydrophilic region is controlled within the range of 0.42–1.33 mm, adjusting the width ratio of the two can significantly improve the condensation efficiency. The condensation efficiency under the optimal combination is approximately 44.19% higher than that of a uniform copper surface. Specifically, the hydrophilic stripe structure is used to quickly collect condensate to form microchannels, while the hydrophobic stripe structure is used to promote the bouncing and falling of droplets to avoid water film accumulation. The two work together to achieve efficient droplet condensation and stably transport the droplets to the water storage tank, providing a continuous water source for subsequent droplet power generation.

[0016] The height of the condenser fins directly affects the supply of effective condensation area and the airflow organization within the cavity. In a preferred embodiment, the condenser fin height is set to 60-100 mm. This height, combined with the aforementioned fin spacing and surface stripe design, provides sufficient heat exchange area within a limited cabinet size, while ensuring smooth airflow and moderate structural strength within the condenser chamber. Higher fins increase the contact path between water vapor and the condensation surface, improving the condensation capacity of a single fin; however, excessively high fins increase airflow resistance and are detrimental to overall arrangement. Therefore, a height of 60-100 mm is an optimized value that balances condensation efficiency and structural stability.

[0017] Furthermore, a water storage tank is provided between the condensation chamber and the droplet power generation array to collect condensate from the condensation chamber; a porous baffle is provided between the water storage tank and the droplet power generation array. The porous baffle has uniformly distributed droplet through-holes. Preferably, the through-holes are arranged in a regular, equally spaced array to ensure that the droplets form a uniform droplet distribution below the baffle, facilitating matching with the droplet power generation unit array below. In addition, maintaining an appropriate distance between the baffle and the droplet power generation array allows the droplets to obtain stable kinetic energy under gravity, improving the output effect when the droplets impact the power generation unit.

[0018] Furthermore, a water guide plate is installed at the bottom of the condensation chamber; this water guide plate is inclined, and its end extends to the top of the water storage tank. A filter screen is also installed between the end of the water guide plate and the top of the water storage tank.

[0019] Furthermore, the energy storage detection system includes a microcontroller and a rectifier and voltage regulator circuit.

[0020] Furthermore, the energy storage detection system also includes a temperature and humidity sensor and a liquid level detector.

[0021] The liquid level detector, installed on the side wall of the water storage tank, monitors the liquid level inside the tank. When the outlet or porous baffle of the water storage tank becomes blocked, causing the water level inside the tank to exceed a preset threshold, the liquid level detector will issue an alarm signal. This preset threshold is directly related to the installation height of the liquid level detector; the installation height is the liquid level threshold at which the alarm is triggered. This threshold can be specifically set according to the volume of the water storage tank and the water supply stability requirements of the droplet power generation unit, accurately distinguishing between high and low liquid levels inside the tank.

[0022] Compared with the prior art, the present invention has the following beneficial effects: (1) The raindrop cascade power generation combined with atmospheric moisture absorption, desorption, condensation, and dripping water dual-source power generation device of the present invention constructs a multi-path energy collection and continuous power supply mechanism that combines raindrop power generation, photovoltaic power generation, and atmospheric water vapor collection. Its working mode is as follows: during the rainfall period, raindrop droplet power generation is the main method; during sunny days, photovoltaic power generation is the core method, and photovoltaic waste heat is used to drive activated carbon fiber desorption-condensation to achieve supplementary droplet power generation; at night, activated carbon fiber completes atmospheric water vapor adsorption, and the load power supply is maintained simultaneously through the energy storage unit.

[0023] This device makes full use of the kinetic energy of raindrops and the potential energy of atmospheric water vapor in the environment. Through the synergy of "power generation + energy storage", it can achieve long-term stable power supply under different weather and day and night conditions. It can provide long-term stable power for low-power electronic devices such as temperature and humidity sensors and wireless transmission, and help build an adaptive and low-maintenance environmental sensing system.

[0024] (2) Energy conservation and emission reduction: This invention achieves the effective utilization of renewable energy sources such as raindrop energy, solar energy, and atmospheric water vapor, reducing dependence on traditional fossil fuels. During rainfall periods, the kinetic energy of raindrops is converted into electrical energy through a droplet cascade power generation array; during non-rainfall periods, photovoltaic panels absorb sunlight to generate electricity, while photovoltaic waste heat drives the desorption of activated carbon fibers to achieve efficient condensation of atmospheric water vapor and droplet power generation. This multi-energy synergistic utilization method avoids the large-scale emission of greenhouse gases such as carbon dioxide during traditional energy power generation, which is of great significance for alleviating the global energy crisis and protecting the environment.

[0025] (3) Economic benefits: The photovoltaic power generation density of a single unit during natural sunlight is 148W / m². 2 During rainfall, the effective power density of the droplet power generation array is 62.11 W / m². 2It can produce up to 73g of condensate per day, driving stable power generation from droplets during non-rainy periods, with a power output of 4.165 × 10⁻⁶. -3 J can be used for trickle charging of energy storage units. Based on a typical configuration with the photovoltaic and droplet system operating together, a single device can continuously supply approximately 38.64 kWh of energy annually. In the context of widespread IoT device deployment, this device can provide stable power to a large number of low-power electronic devices (such as temperature and humidity sensors, wireless transmission modules, etc.), reducing the cost of frequent battery replacements and losses due to power outages caused by insufficient power supply. Its lightweight structure and ease of deployment reduce installation and maintenance costs, resulting in good economic benefits in long-term operation.

[0026] The aforementioned daily condensate production of 73g is a calculation result under typical high-humidity environments (such as the climate conditions of Guangzhou). This is sufficient to provide a continuous water source for the droplet power generation array during daytime desorption-condensation on non-rainy days, supplementing power generation and providing power to low-power sensors. In areas with even lower humidity, the actual water vapor adsorption will decrease as the ambient humidity decreases. The available water volume can be increased by increasing the amount of activated carbon fiber filling, connecting multiple composite plates in parallel, or adjusting the adsorption / desorption cycle. Relevant parameters can be engineered to match the target application scenario.

[0027] (4) Social Benefits: This device is suitable for IoT scenarios such as ecological monitoring in remote mountainous areas, agricultural sensing, and meteorological sensing along highways. In remote mountainous areas, it can provide continuous power for ecological monitoring equipment, helping to better protect the ecological environment and monitor natural disaster risks; in agricultural production, it can power agricultural sensing equipment, enabling precision agricultural management and improving crop yield and quality; along highways, it can provide stable energy for meteorological sensing equipment, ensuring traffic safety. By promoting this device, we can facilitate the widespread application of IoT technology in various fields, promote the development of related industries, and improve social productivity and quality of life. Attached Figure Description

[0028] Figure 1 This is a perspective view of the overall structure of the dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets, as provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the droplet power generation array provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the droplet power generation unit provided in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the working principle of the droplet power generation unit provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the photovoltaic composite panel provided in an embodiment of the present invention; Figure 6This is a schematic diagram illustrating the working principle of the photovoltaic composite panel provided in this embodiment of the invention; Figure 7 This is a schematic diagram of the arrangement of the condenser fins provided in an embodiment of the present invention; Figure 8 This is an overall workflow diagram of the dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets, provided in an embodiment of the present invention.

[0029] In the diagram: 1-box, 2-droplet power generation array, 3-condensation chamber, 4-energy storage detection system, 5-photovoltaic composite panel, 51-photovoltaic panel, 52-heat-conducting plate, 53-fiber layer, 6-water storage tank, 7-support plate, 8-droplet power generation unit, 81-bottom electrode, 82-intermediate triboelectric layer, 83-top electrode, 84-resistor, 9-droplet, 10-mounting plate, 11-assembly guide rail, 12-water guide plate, 13-filter screen, 14-porous partition, 15-condensation fin, 16-hydrophilic stripe structure, 17-hydrophobic stripe structure. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0031] Example 1 In this embodiment, a dual-source power generation device is used, which combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets. Figure 1 As shown, it includes: a housing 1, a droplet power generation array 2, a condensation chamber 3 and an energy storage detection system 4 disposed inside the housing 1, and a photovoltaic composite panel 5 disposed on the top of the housing 1.

[0032] A condenser chamber 3 is located at the top of the housing 1, and a droplet generator array 2 is located below the condenser chamber 3. A water storage tank 6 is provided between the condenser chamber 3 and the droplet generator array 2 to collect condensate from the condenser chamber 3. A water guide plate 12 is provided at the bottom of the condenser chamber 3; the water guide plate 12 is inclined, and its end extends to the top of the water storage tank 6. A filter screen 13 is also provided between the end of the water guide plate 12 and the top of the water storage tank 6 to filter the condensate.

[0033] A porous partition 14 is provided between the water storage tank 6 and the droplet power generation array 2. Specifically, the porous partition 14 is provided with uniformly distributed droplet through holes.

[0034] Specifically, the condensate in the condensation chamber 3 flows onto the water guide plate 12, and is further collected into the water storage tank 6. An outlet is provided on the side of the water storage tank 6, through which the water flows onto the porous partition plate 14, and through the droplet through-holes to form uniformly sized droplets that fall onto the droplet power generation array 2 for droplet power generation.

[0035] The structure of the droplet power generation array 2 is as follows Figure 2 As shown, the device includes a support plate 7 and multiple droplet-based electricity generators (DEG units) 8, which are arranged in an array on the upper surface of the support plate 7. The support plate 7 comprises an acrylic support plate. The droplet-based electricity generators 8 are arranged at an angle.

[0036] Specifically, the droplet power generation array 2 adopts a three-layer staggered arrangement design. Each layer includes multiple parallel and inclined support plates 7, each with an inclination angle of 45°, and each support plate 7 has 6 droplet power generation units 8. The planar dimensions of the droplet power generation unit 8 are approximately 30 mm × 30 mm, and the thickness is approximately 2 mm. The entire three-layer droplet power generation array 2 consists of 23 support plates 7, arranged in an 8-7-8 staggered pattern. The horizontal spacing between each droplet power generation unit 8 is approximately 7.5 cm, and the vertical spacing between layers is approximately 15 cm. The inclination angle of each droplet power generation unit 8 is the same as that of the support plate. This three-layer 8-7-8 staggered arrangement structure increases the number of support plates (including droplet power generation units) that can be arranged from 8 in a single layer to 23 without significantly increasing the footprint of the device enclosure. Theoretically, the effective droplet receiving area is about 23 / 8 times that of a single-layer arrangement. By using a layered and staggered layout, the space utilization and droplet capture rate are improved, and the falling droplets can collide with the power generation units at different heights and positions in multiple stages. This significantly increases the number of effective contacts between the droplets and the power generation units per unit time, reduces energy loss caused by droplets falling, overlapping, or splashing, and thus improves the overall power output capability of the array under the same rainfall conditions. At the same time, it enhances the continuity, stability, and efficiency of the power generation signal.

[0037] Specifically, such as Figure 1 As shown, the support plate 7 of the droplet power generation array 2 is fixedly mounted at both ends between two opposing mounting plates 10. Assembly guide rails 11 are provided at the four corners of the housing 1, and sliding tracks matching the assembly guide rails 11 are provided on the left and right sides of the mounting plates 10. During assembly, simply align the sliding tracks on both sides of the mounting plate 10 with the assembly guide rails 11 and push it in along the length of the guide rail to complete the assembly; during disassembly, the mounting plate 10 can be removed by pulling it back. This invention achieves convenient disassembly of the mounting plate 10 inside the housing 1 through the cooperative design between the mounting plate 10 and the assembly guide rails 11 inside the housing 1.

[0038] The structure of the droplet power generation unit 8 is as follows: Figure 3 As shown, it includes a bottom electrode 81, a middle triboelectric layer 82, and a top electrode 83. A resistor 84 is also connected between the bottom electrode 81 and the top electrode 83.

[0039] Specifically, the bottom electrode 81 is an indium tin oxide (ITO) electrode, the intermediate triboelectric layer 82 is a fluorinated ethylene propylene (FEP) electrode layer, and the top electrode is an aluminum foil electrode. The upper surface of the intermediate triboelectric layer 82 is coated with a superhydrophobic coating; the top electrode 83 is disposed on one side of the intermediate triboelectric layer 82.

[0040] The working principle of the droplet power generation unit 8 is as follows: Figure 4 As shown, when droplet 9 falls from a certain height, it contacts the surface of the intermediate triboelectric layer 82, expands, and forms a temporary capacitor structure. During the expansion process, droplet 9 generates positive charges through friction, while the substrate of the bottom electrode 81 is induced to generate positive charges. When droplet 9 retracts, the charge is transferred from the capacitor structure to the electrode, generating current output. The hydrophobic coating on the surface of the intermediate triboelectric layer 82 reduces the droplet's adhesion time and enhances its rolling properties, thereby improving power generation efficiency.

[0041] The structure of photovoltaic composite panel 5 is as follows: Figure 5 As shown, the photovoltaic composite panel 5 includes a photovoltaic panel 51 (250 mm × 105 mm), a heat-conducting plate 52 (205 mm × 110 mm), and a fiber layer 53; the heat-conducting plate 52 is disposed between the photovoltaic panel 51 and the fiber layer 53. The photovoltaic panel 51 absorbs solar radiation and converts it into electrical energy. The unconverted light energy is retained as waste heat, which is conducted to the fiber layer 53 via the heat-conducting plate 52.

[0042] The heat-conducting plate 52 comprises an aluminum plate, and the fiber layer 53 comprises an activated carbon fiber layer (205 mm × 110 mm, 3 cm thick). The activated carbon fiber layer is selected with a specific surface area of ​​1800 m². 2 / g of activated carbon fiber, after being dried at 120°C to remove moisture, is sequentially impregnated with silica sol and lithium chloride solution, and then dried at 120°C to obtain modified activated carbon fiber material. This modified activated carbon fiber, due to its porous structure and high specific surface area, exhibits a saturated adsorption capacity of approximately 1.49g / g and a desorption capacity of approximately 0.6g / g under environmental conditions of 25°C and 70% relative humidity. Based on the designed cycle conditions, the daily water production is approximately 73g, fully demonstrating the excellent water vapor adsorption capacity and release capacity brought about by the synergistic effect of high specific surface area activated carbon fiber and hygrophilic salt (lithium chloride). It achieves efficient water adsorption and release, enabling fiber layer 53 to possess both thermal management and water circulation functions.

[0043] Specifically, such as Figure 5 As shown, the photovoltaic composite panel 5 is movably connected to the top edge of the housing 1, and the photovoltaic composite panel 5 can perform opening and closing actions on the top of the housing 1.

[0044] A schematic diagram of the working principle of photovoltaic composite panel 5 is shown below. Figure 6 As shown, during daytime sunlight hours: the photovoltaic composite panel 5 is in a closed state, and the top photovoltaic panel 51 generates electricity while simultaneously producing waste heat. This waste heat is conducted to the lower fiber layer 53 through the middle heat-conducting plate 52. Moisture in the activated carbon fibers desorbs through thermal drive, generating water vapor at high temperatures, which carries away excess heat, achieving passive cooling of the photovoltaic panel 51. This process not only effectively reduces the operating temperature of the photovoltaic panel 51, preventing efficiency degradation due to heat accumulation, but also generates water vapor that condenses in the condensation chamber 3 to form droplets for subsequent power generation.

[0045] At night: Photovoltaic composite panel 5 is opened, exposing the activated carbon fiber layer to the atmosphere. Through its high specific surface area and microporous structure, the activated carbon fiber re-adsorbs moisture from the air, completing the regeneration of moisture and providing a water source for the desorption process the next day.

[0046] Multiple condensing fins 15 are symmetrically arranged on both sides inside the condensing chamber 3. These fins measure 195 mm × 80 mm and are 5 mm thick. Figure 7 As shown, multiple condensing fins 15 are arranged in parallel with equal spacing (5 cm between them). This equal spacing arrangement can achieve a balance between condensing area and channel ventilation efficiency, which is beneficial to forming a stable and uniform condensing flow field in the condensing chamber 3.

[0047] Specifically, the condensing fin 15 is an aluminum fin structure with alternating hydrophilic stripe structures 16 (0.85 mm wide) and hydrophobic stripe structures 17 (0.80 mm wide) on its surface. The overall height of the condensing fin 15 is 80 mm, and it is assembled in the condensing chamber 3 in a symmetrical arrangement on both sides. After the water vapor desorbed from the activated carbon fiber layer enters the condensing chamber 3, it condenses on the surface of the condensing fin 15. The heat generated during the condensation process is conducted through the condensing fin 15 and dissipated to the atmosphere through convection and radiation. At the same time, through the synergistic effect of the hydrophilic and hydrophobic stripes on the surface, high-efficiency droplet condensation is achieved, optimizing the water vapor condensation process.

[0048] Specifically, in the early stage of condensation, condensed droplets gradually form continuous microchannels in the hydrophilic stripe structure 16, while fewer droplets condense in the hydrophobic stripe structure 17. The droplets are cleared by self-driven bouncing. As the condensation process proceeds, droplets grow on the hydrophobic stripe structure 17. When larger droplets touch the hydrophilic stripe structure 16 at the wetting boundary, they are rapidly drawn in and move in a directional manner. The droplets that collect in the microchannels slide down under the action of gravity, achieving droplet condensation. Finally, they flow into the water storage tank 6 for collection and are used for subsequent droplet power generation.

[0049] The energy storage detection system 4 is electrically connected to the droplet power generation array 2 and the photovoltaic panel 51 respectively. The energy storage detection system 4 is also electrically connected to an external energy storage device or load.

[0050] The energy storage detection system 4 includes a microcontroller and a rectifier and voltage regulator circuit. The rectifier and voltage regulator circuit is used to rectify and regulate the output voltage of the droplet power generation array 2 and the photovoltaic composite panel 5 and output it to external devices.

[0051] The energy storage monitoring system 4 also includes a temperature and humidity sensor and a liquid level detector. The temperature and humidity sensor is used to monitor the temperature and humidity inside the housing 1, and issues an alarm signal when the temperature or humidity inside the housing 1 exceeds the set value.

[0052] The liquid level detector is used to monitor the liquid level inside the tank 1. It is arranged on the side wall of the water storage tank 6. When the outlet of the water storage tank 6 is blocked or the porous partition 14 is blocked, the water accumulation in the tank 1 exceeds the preset threshold, and an alarm signal will be issued.

[0053] This device utilizes the combined effects of raindrop power generation, photovoltaic power generation, and supplementary liquid droplet power generation driven by atmospheric water vapor to provide continuous and stable power to low-power components such as liquid level detectors and temperature and humidity sensors with the help of energy storage units. This reduces the frequency and cost of replacing external batteries and lowers the risk of monitoring interruptions due to insufficient power supply.

[0054] The overall workflow diagram of the dual-source power generation device, which combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets, is shown below. Figure 8 As shown, during rainfall, the photovoltaic composite panel 5 is in the open state, and rainwater is filtered through the filter screen 13 and collected into the water storage tank 6. The water in the water storage tank 6 is diverted to the porous partition 14, and uniform droplets are formed through the through holes on the porous partition 14. The droplets fall onto the droplet power generation array 2 below, driving the droplet power generation array 2 to generate droplet power.

[0055] During non-rainy periods, the device's operation is divided into two stages according to the day-night cycle: at night, the photovoltaic composite panel 5 is open, and the fiber layer 53 begins to adsorb water vapor from the air for atmospheric water collection; during the day, the photovoltaic composite panel 5 is closed. On the one hand, the photovoltaic panel 51 absorbs solar radiation and directly converts solar energy into electrical energy; on the other hand, the heat-conducting plate 52 simultaneously transfers the waste heat generated during photovoltaic power generation to the fiber layer 53, using this waste heat to desorb water vapor from the fiber layer 53. The desorbed water vapor enters the condensation chamber 3, where it condenses to form liquid condensate, which is then collected in the water storage tank 6. The water in the water storage tank 6 is then guided to the porous partition 14, where it forms uniform droplets through the through-holes in the porous partition 14. These droplets fall onto the droplet power generation array 2 below, driving the droplet power generation array 2 to generate electricity. The fiber layer 53, after water vapor desorption, is then prepared for the subsequent atmospheric water collection process at night.

[0056] In addition, the electrical energy generated by the droplet power generation array 2 and the photovoltaic panel 51 is output to the external energy storage device or directly supplied to the load through the rectification and voltage regulation circuit on the energy storage detection system 4; at the same time, the device monitors the temperature and humidity in real time through temperature and humidity sensors to ensure the stable operation of the system.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual-source power generation device that combines raindrop cascade power generation with atmospheric moisture absorption, desorption, and condensation of water droplets, characterized in that, include: The enclosure (1), the droplet power generation array (2), the condensation chamber (3) and the energy storage detection system (4) are installed inside the enclosure (1), and the photovoltaic composite panel (5) is installed on the top of the enclosure (1); wherein, The condensation chamber (3) is located at the top inside the housing (1); The droplet power generation array (2) is located below the condensation chamber (3); The photovoltaic composite panel (5) is movably connected to the housing (1); the photovoltaic composite panel (5) includes a photovoltaic panel (51), a heat-conducting plate (52) and a fiber layer (53); the heat-conducting plate (52) is disposed between the photovoltaic panel (51) and the fiber layer (53); The energy storage detection system (4) is electrically connected to the droplet power generation array (2) and the photovoltaic panel (51) respectively; The droplet power generation array (2) includes a support plate (7) and multiple droplet power generation units (8), which are arranged in an array on the upper surface of the support plate (7); the droplet power generation units (8) are inclined. The droplet power generation unit (8) includes a bottom electrode (81), a middle triboelectric layer (82), and a top electrode (83); the upper surface of the middle triboelectric layer (82) is coated with a superhydrophobic coating; the top electrode (83) is disposed on one side of the middle triboelectric layer (82); The fiber layer (53) includes an activated carbon fiber layer.

2. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 1, is characterized in that, The heat-conducting plate (52) comprises an aluminum plate.

3. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 2, is characterized in that... The activated carbon fiber layer is a modified activated carbon fiber material obtained by drying and dehumidifying, then impregnating it sequentially with silica sol and lithium chloride solution, and finally drying it.

4. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 1, characterized in that, Multiple condensing fins (15) are symmetrically arranged on both sides inside the condensing chamber (3).

5. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 4, is characterized in that... The condensation fins (15) include an aluminum fin structure; the surface of the aluminum fin structure is alternately provided with hydrophilic stripe structures (16) and hydrophobic stripe structures (17); the multiple aluminum fin structures are arranged in parallel at equal intervals.

6. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 1, characterized in that, A water storage tank (6) is provided between the condensation chamber (3) and the droplet power generation array (2); a porous partition (14) is provided between the water storage tank (6) and the droplet power generation array (2).

7. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 6, is characterized in that... A water guide plate (12) is provided at the bottom of the condensation chamber (3); the water guide plate (12) is inclined and its end extends to the top of the water storage tank (6); a filter screen (13) is also provided between the end of the water guide plate (12) and the top of the water storage tank (6).

8. The dual-source power generation device for raindrop cascade power generation combined with atmospheric moisture absorption, desorption, and condensation of water droplets as described in claim 1, characterized in that, The energy storage detection system (4) includes a temperature and humidity sensor and a liquid level detector.

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