Integrated system and method combining photovoltaic power generation, continuous water taking from air and electrolytic hydrogen production

Abstract

The invention discloses an integrated system and method combining photovoltaic power generation, continuous water taking from air and electrolytic hydrogen production. The system comprises a photovoltaic power generation module, a continuous multi-adsorption-bed module, a thermoelectric temperature control module, a condensation water collection module and an electrolytic hydrogen production module. The photovoltaic power generation module is connected with the thermoelectric temperature control module and the electrolytic hydrogen production module, the thermoelectric temperature control module is connected with the continuous multi-adsorption-bed module and the condensation water collection module, the continuous multi-adsorption-bed module is connected with the condensation water collection module, and the condensation water collection module is connected with the electrolytic hydrogen production module. According to the invention, the continuous device design is adopted, and the adsorption-desorption period of the continuous multi-adsorption-bed module is optimized, so that efficient water extraction from air is realized; the photovoltaic power generation module is arranged, all-weather operation of the photovoltaic power generation module is achieved, and more efficient active heating / cooling is achieved through double-end utilization of the thermoelectric temperature control module and heat transfer optimization of the condensation water collection module; and by arranging the electrolytic hydrogen production module, closed-loop utilization of water resources is achieved, and the system is suitable for desert areas without power grid coverage.

Description

Technical Field

[0001] The present invention belongs to the technical field of comprehensive utilization of renewable energy, and particularly relates to an integrated system and method combining photovoltaic power generation, continuous air water extraction and electrolytic hydrogen production, which is applicable to the efficient development of resources in arid areas such as deserts. Background Art

[0002] One existing air water extraction technology is to enrich the moisture in the air through the adsorption and desorption process and generate high-temperature water vapor that is easier to condense, so as to obtain water resources in the desert. However, most of these devices adopt a simple discontinuous working mode, that is, adsorption at night and desorption in a cyclic manner during the day, and finally it is difficult to make full use of the interval with faster kinetics and the moisture in the air. For the traditional continuous working mode of multiple adsorption beds, the device has the problem of time waste during the conversion of adsorption and desorption due to the mismatch between the adsorption and desorption cycles, and there are problems such as complex pipeline design, slow heat regeneration rate, and high pump power consumption when using the heat regenerative working medium to utilize the energy of heating and cooling during the adsorption bed cycle. At the same time, the device relies on light to passively heat the hydrogel, that is, the energy is single, greatly affected by light fluctuations, and it is difficult to accurately control the working conditions of the hydrogel. In addition, the condensation water collection module lacks the collaborative design of enhanced heat transfer and removal of condensate, and it is difficult to achieve closed-loop utilization of resources. Summary of the Invention

[0003] To solve the above problems, the purpose of the present invention is to provide an integrated system and method combining photovoltaic power generation, continuous air water extraction and electrolytic hydrogen production. The system realizes efficient water extraction and hydrogen production through a continuous multi-adsorption bed module, a thermoelectric temperature control module and a condensation water collection module.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] An integrated system combining photovoltaic power generation, continuous air water extraction and electrolytic hydrogen production, comprising: a photovoltaic power generation module, a continuous multi-adsorption bed module, a thermoelectric temperature control module, a condensation water collection module and an electrolytic hydrogen production module;

[0006] The photovoltaic power generation module is connected to the thermoelectric temperature control module and the electrolytic hydrogen production module, the thermoelectric temperature control module is connected to the continuous multi-adsorption bed module and the condensation water collection module, the continuous multi-adsorption bed module is connected to the condensation water collection module, and the condensation water collection module is connected to the electrolytic hydrogen production module.

[0007] Further, the continuous multi - adsorption bed module includes a top cover, a spline shaft, a linear thrust motor, a bottom plate, a rotary servo motor and multiple rotary adsorption beds. The rotary servo motor drives the rotary adsorption beds to rotate through the spline shaft. The top cover includes a top plate. A round hole is provided in the middle of the top plate for sleeving on the spline shaft. A baffle is provided on the bottom surface of the top plate on one side of the round hole. A steam outlet is provided on the baffle. A cuboid - shaped cavity is formed between the baffle and the top plate. And there is a gap between the round hole of the top cover and the spline shaft.

[0008] The rotary servo motor is connected to the rotary adsorption beds. The linear thrust motor is located above the top cover.

[0009] Water - absorbent adsorption materials are provided on the rotary adsorption beds.

[0010] Spring dampers are provided between one end of the top cover and one end of the bottom plate, and spring dampers are also provided between the other end of the top cover and the other end of the bottom plate.

[0011] A first spring is provided on the spline shaft sleeve between the top cover and the rotary adsorption bed, and a second spring is provided on the spline shaft sleeve between the rotary adsorption bed and the bottom plate.

[0012] Further, in the working state, the linear thrust motor exerts a downward force on the top cover. The top cover compresses the spring dampers and the first spring. At the same time, the second spring is also compressed by the rotary adsorption bed. The baffle compresses the water - absorbent adsorption materials downward, making the water - absorbent adsorption materials in close contact with the rotary adsorption bed. At this time, the water - absorbent adsorption materials are in the desorption state, and the water - absorbent adsorption materials in the desorption state are connected to the thermoelectric temperature control module.

[0013] Further, the ratio of the desorption time to the adsorption time of the water - absorbent adsorption materials is:.

[0014] Further, the condensation water collection module includes a cavity and a collection box. A steam inlet is provided at one end of the cavity, and a condensed water outlet is provided at the other end of the cavity. The condensed water outlet is connected to the collection box. A water level monitoring device is provided on the collection box. Hydrophilic materials are provided between adjacent triangular - pyramidal fins which are arranged in parallel on a substrate on the inner wall surface of the cavity.

[0015] Further, a phase - change heat storage material is provided on the outer wall surface of the cavity of the condensation water collection module. The phase - change heat storage material is connected to the thermoelectric temperature control module through a heat pipe.

[0016] Further, the thermoelectric temperature control module includes a thermoelectric cooler and a heat pipe. The thermoelectric cooler includes a hot end and a cold end. The hot end is attached to the bottom of the adsorption bed in the desorption stage in the continuous multi - adsorption bed module. The cold end is connected to the rotary adsorption bed in the adsorption stage in the continuous multi - adsorption bed module through a set of heat pipes. At the same time, the cold end is connected to the phase - change heat storage material in the condensation water collection module through another set of heat pipes.

[0017] Further, the electrolytic hydrogen production module includes an alkaline electrolytic cell and a control valve. The photovoltaic power generation module is connected to the alkaline electrolytic cell, and the alkaline electrolytic cell is connected to the condensation and water collection module through the control valve.

[0018] Further, it also includes a maximum power point tracking device, a first DC-DC converter, and a single-chip microcomputer control system;

[0019] The photovoltaic power generation module is connected to the maximum power point tracking device. The maximum power point tracking device is connected to the storage battery. The maximum power point tracking device is connected to the thermoelectric temperature control module through the first DC-DC converter, and the maximum power point tracking device is connected to the electrolytic hydrogen production module through a switching tube.

[0020] A method combining photovoltaic power generation, continuous air water intake, and electrolytic hydrogen production includes the following steps:

[0021] The rotating servo motor drives the rotating adsorption bed to rotate, and water vapor is adsorbed by the water-absorbing adsorption material in the rotating adsorption bed. When the water-absorbing adsorption material after adsorption rotates above the thermoelectric cooler, the thrust linear motor pushes the top cover downward. When the top cover moves downward, the first spring and the second spring are compressed, so that the water-absorbing adsorption material after adsorption is closely attached to the thermoelectric cooler. The thermoelectric cooler heats the water-absorbing adsorption material, and the adsorbed water vapor is desorbed. The water vapor is discharged from the water vapor outlet and enters the condensation and water collection module, and finally liquid water is obtained. At the same time, the water-absorbing adsorption material that completed desorption in the previous cycle is exposed to the air and changes from the desorption state to the adsorption state. After adsorption is completed, it rotates to the thermoelectric cooler again and enters the next heating and desorption cycle. The collected liquid water is electrolyzed in the electrolytic hydrogen production module to be converted into hydrogen.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the present invention, the photovoltaic power generation module is connected to the thermoelectric temperature control module, the thermoelectric temperature control module is connected to the continuous multi-adsorption bed module and the condensation and water collection module, the continuous multi-adsorption bed module is connected to the condensation and water collection module, and the condensation and water collection module is connected to the electrolytic hydrogen production module. By setting the photovoltaic power generation module, the photovoltaic power generation module can operate all-weather and enhance the stability of active heating / cooling. By setting the electrolytic hydrogen production module, the closed-loop utilization of water resources is realized, which is applicable to desert areas without power grid coverage.

[0024] Further, in the present invention, by setting a continuous multi-adsorption bed, the adsorption and desorption intervals with faster adsorption kinetics are selected, and the ratio of the adsorption bed to the desorption bed in a working state is determined according to the time ratio of adsorption to desorption, reducing the efficiency loss caused by the situation that the desorption bed has not completed desorption during the conversion stage of the adsorption bed.

[0025] Furthermore, in the thermoelectric refrigeration module, the thermoelectric refrigeration device realizes more efficient heat regeneration, active heating and cooling through the utilization of both the hot and cold ends. By designing the heat transfer path from the thermoelectric refrigeration device to the condensation and water collection module, the excess cold generated by the thermoelectric refrigeration device is timely transferred to the condensation and water collection module, avoiding heat transfer between the hot and cold ends and improving the efficiency of thermoelectric refrigeration.

[0026] Furthermore, the condensation and water collection module combines triangular conical fins and hydrophilic hydrogels to achieve enhanced heat transfer and improve heat transfer efficiency. Description of the Drawings

[0027] Figure 1 It is the front view of the connection relationship between the continuous multi-adsorption bed module and the thermoelectric temperature control module. Among them, (a) is the schematic diagram when the top cover compresses the water-absorbing adsorption material, and (b) is the schematic diagram when the top cover does not press the water-absorbing adsorption material;

[0028] Figure 2 It is the schematic diagram of the multi-adsorption bed and heat pipe in the continuous multi-adsorption bed module. Among them, (a) is the top view of the rotating adsorption bed and the heat pipe (i.e., the front of the adsorption bed), and (b) is the bottom view (i.e., the back of the adsorption bed);

[0029] Figure 3 It is the schematic diagram of the electrical system of the photovoltaic power generation module, continuous multi-adsorption bed and electrolytic hydrogen production module;

[0030] Figure 4 It is the schematic diagram of the enhanced heat transfer surface in the condensation and water collection module; among them, (a) is the three-dimensional view, and (b) is the top view;

[0031] Figure 5 It is the schematic diagram of the condensation and water collection module; among them, (a) is the schematic diagram of the condensation and water collection module, and (b) is the enlarged view of the dotted box in Figure (a);

[0032] Figure 6 It is the relationship diagram of each module in the integrated system combining photovoltaic power generation, continuous atmospheric water intake and electrolytic hydrogen production;

[0033] In the figure, 1 - spring damper, 2 - top cover, 3 - rotating adsorption bed, 4 - water-absorbing adsorption material, 5 - motor spline shaft, 6 - linear thrust motor, 7 - water vapor outlet, 8 - device bottom cover, 9 - spring, 10 - rotating servo motor, 11 - thermoelectric cooler, 12 - heat pipe, 13 is the base material, 14 is the fin, 15 is the hydrophilic material, 16 is the condensate outlet, 17 is the phase change heat storage material, 18 is the maximum power point tracking device, 19 is the single-chip microcomputer control system, 20 is the photovoltaic panel, 21 is the storage battery, 22 is the switching tube, 23 is the alkaline electrolytic cell, 24 is the first DC-DC converter, 25 is the thermoelectric temperature control module. Detailed Implementation Modes

[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0035] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0036] See also Figure 6 The present invention provides an integrated system combining photovoltaic power generation, continuous air water extraction and electrolytic hydrogen production, including: a photovoltaic power generation module, a continuous multi-adsorption bed module, a thermoelectric temperature control module 25, a condensation water collection module and an electrolytic hydrogen production module; the photovoltaic power generation module is connected to the thermoelectric temperature control module 25, the thermoelectric temperature control module 25 is connected to the continuous multi-adsorption bed module and the condensation water collection module, the continuous multi-adsorption bed module is connected to the condensation water collection module, and the condensation water collection module is connected to the electrolytic hydrogen production module.

[0037] Photovoltaic power generation module: used to collect solar energy and power the system for round-the-clock operation.

[0038] Continuous multi-adsorption bed module: used to perform adsorption and desorption cycles to adsorb moisture contained in the atmosphere and then generate high-temperature water vapor, and continuously generate water vapor through alternating cycles of multiple adsorption beds. The continuous multi-adsorption bed module includes multiple rotating adsorption beds.

[0039] Thermoelectric temperature control module 25: used to control the temperature of the adsorption beds in the continuous multi-adsorption bed module to complete the conversion between adsorption and desorption and realize heat recovery between the multiple adsorption beds.

[0040] Condensation water collection module: used to cool high-temperature water vapor to below the dew point temperature and efficiently collect condensed water, and then transport it to the electrolytic hydrogen production module. The condensation water collection module includes a substrate 13, a heat pipe and a phase change thermal storage material 17.

[0041] Electrolysis hydrogen production module: used to electrolyze the collected condensed water and produce hydrogen, which is stored under high pressure or directly used by hydrogen fuel cells. The electrolysis hydrogen production module includes an alkaline electrolyzer 23, a water level monitoring device and a control valve.

[0042] Among them, the photovoltaic power generation module includes a photovoltaic panel 20, a maximum power point tracking device, a power control device, and a storage battery 21. The maximum power point tracking device, the power control device, and the storage battery 21 are all connected to the photovoltaic panel 20. The photovoltaic panel 20 collects solar energy through the photovoltaic effect, converts light energy into electrical energy, then dynamically adjusts the working point through the maximum power point tracking device to make the output voltage and current reach the maximum power, and inputs the electrical energy into the load circuit in parallel with the thermoelectric temperature control module 25 and the storage battery 21, thus contributing to the efficient utilization of solar energy and all-weather operation.

[0043] It should be noted that the electrical energy converted by the photovoltaic power generation module will fluctuate due to factors such as light intensity fluctuations and temperature. Therefore, before the electrical energy is input into the load circuit, it is necessary to control the flow of electrical energy through the power control device. When the input electrical power is higher than the required power set by the thermoelectric temperature control module 25, the power control device supplies electrical energy to the thermoelectric temperature control module 25 through the power switch and charges the storage battery 21 at the same time; when the input electrical power is lower than the required power set by the thermoelectric temperature control module 25, the power control device makes the storage battery 21 in a discharging state through the power switch to reduce the impact of power fluctuations. At the same time, the storage battery 21 is electrically connected to the electrolytic hydrogen production module, and a part of the electrical energy generated by the photovoltaic is converted into hydrogen energy through the alkaline electrolytic cell 23 for storage and the production of hydrogen and oxygen products.

[0044] Among them, when working at night, the power switch controls the storage battery 21 to release electrical energy, so as to realize the night operation of the system.

[0045] The thermoelectric temperature control module 25 includes a thermoelectric cooler 11 and a heat pipe 12. The thermoelectric cooler 11 includes a hot end and a cold end. Through the Peltier effect, the thermoelectric cooler 11 releases and absorbs heat at the hot and cold ends respectively. The hot end is attached to the continuous multi-adsorption bed module, at the bottom of the adsorption bed in the desorption stage, providing heat for the desorption process to realize the release of water vapor under high temperature conditions; while the cold end is provided with two sets of heat pipes. The cold end is connected to the adsorption bed in the adsorption stage through a set of heat pipes 12 to cool the adsorption bed to normal temperature to realize efficient adsorption. The cold end is also connected to the phase change heat storage material 17 in the condensation water collection module through another set of heat pipes.

[0046] It should be noted that the thermoelectric cooler 11 is connected with a condensation water collection module. The utilization of the hot and cold ends of the thermoelectric cooler 11 avoids the loss caused by choosing to dissipate heat to the environment to reduce the mutual transfer of energy generated at the hot and cold ends during single-end utilization, and at the same time realizes the heat regeneration in the high-low temperature conversion process of the continuous multi-adsorption bed module during adsorption and desorption. At the same time, by allocating the cold quantity to the condensation water collection module, it is avoided that the excess cold quantity affects the heat generation at the hot end through the self-heat conduction of the thermoelectric chips of the thermoelectric cooler 11.

[0047] See Figure 1 in (a) and (b) andFigure 5 The continuous multi - adsorption bed module includes a top cover 2, a spline shaft 5, a linear thrust motor 6, a bottom plate 8, a rotary servo motor 10 and multiple rotary adsorption beds 3. The rotary servo motor 10 drives the rotary adsorption beds 3 to rotate through the spline shaft 5. The top cover 2 includes a top plate. A round hole is provided in the middle of the top plate for sleeving on the spline shaft 5. A baffle is provided on the bottom surface of the top plate on one side of the round hole. A steam outlet 7 is provided on the baffle. A cuboid - shaped cavity is formed between the baffle and the top plate. And there is a gap between the round hole of the top cover 2 and the spline shaft 5.

[0048] The rotary servo motor 10 is connected to the rotary adsorption bed 3, and the linear thrust motor 6 is located above the top cover 2;

[0049] A water - absorbent adsorption material is provided on the rotary adsorption bed 3;

[0050] A spring damper 1 is provided between one end of the top cover 2 and one end of the bottom plate 8, and a spring damper 1 is also provided between the other end of the top cover 2 and the other end of the bottom plate 8. The spring damper 1 is used to improve the stability of the mechanical structure.

[0051] A first spring is provided on the spline shaft sleeve between the top cover 2 and the rotary adsorption bed 3, and a second spring is provided on the spline shaft sleeve between the rotary adsorption bed 3 and the bottom plate 8.

[0052] In the working state, the linear thrust motor 6 applies a downward force to the top cover 2. The top cover 2 compresses the spring damper 1 and the first spring. At the same time, the second spring is also compressed by the rotary adsorption bed 3. The baffle 2 compresses the water - absorbent adsorption material downward, making the water - absorbent adsorption material in close contact with the rotary adsorption bed 3. At this time, the water - absorbent adsorption material is in the desorption state, and the rotary adsorption bed 3 where the water - absorbent adsorption material in the desorption state is located is connected to the thermoelectric temperature control module 25.

[0053] Preferably, there are 4 rotary adsorption beds 3 in the present invention.

[0054] A water-absorbing adsorbent material is provided on each rotary adsorption bed 3. Only the material on one rotary adsorption bed is in the desorption state and is connected to the hot end of the thermoelectric cooler 11 during the working state. There are various types of substances for the water-absorbing adsorbent material, which can be gel polymers, hygroscopic salt composites, metal-organic framework compounds, etc. It should be noted that the water-absorbing adsorbent material of the present invention is a PHEA-LiCl hydrogel polymerized by a photoinitiator (see the literature: XU X, LIU W, XIANT, et al. Nanoporous Silica Lattice Coated with LiCl@PHEA for Continuous Water Harvesting from Atmospheric Humidity [J]. Advanced Functional Materials, 2024, 34(38)). The ratio of the desorption time to the adsorption time of this hydrogel is 1:3. In one working state, three adsorption beds perform adsorption, and the other adsorption bed performs desorption. In practice, the number of adsorption beds can be adjusted according to the optimal desorption and adsorption time ratio of the selected adsorbent material.

[0055] See Figure 2 In (a) and (b) of [reference], a water vapor outlet 7 is provided on the baffle above the rotary adsorption bed 3 in the desorption state to communicate with the condensation water collection module. When the desorption work is completed, due to the set time ratio, there is an adsorption bed that has just completed adsorption among the multiple adsorption beds in the adsorption state. At this time, the linear thrust motor 6 releases thrust so that the rotary adsorption bed no longer fits with the heat pipe or the thermoelectric cooler 11. Then the rotary servo motor 10 rotates the adsorption bed so that the adsorption bed that has completed adsorption rotates above the hot end of the thermoelectric cooler 11, and the linear thrust motor 6 presses again.

[0056] See Figure 4 In (a) and (b) of [reference] and Figure 5In (a) and (b), the condensate water module includes a cavity and a collection box. One end of the cavity is provided with a water vapor inlet, and a water vapor outlet 7 is connected to the water vapor inlet. Water vapor enters the cavity through the water vapor inlet. The other end of the cavity is provided with a condensate water outlet 16. On the inner wall surface of the cavity, there is a substrate 13, and the surface of the substrate 13 is a strengthened heat transfer surface. A number of triangular pyramid fins 14 are arranged in parallel on the substrate 13, and a hydrophilic material 15 is arranged between adjacent triangular pyramid fins 14. Through the triangular pyramid fins 14 and the hydrophilic material 15 (the hydrophilic material 15 is a hydrophilic hydrogel, such as a sample prepared by cross-linking sodium alginate and polyvinyl alcohol using the freeze-thaw method, see the literature: ZHANG W, JIQ, ZHANG G, et al. Pumping and sliding of droplets steered by a hydrogel pattern for atmospheric water harvesting[J]. National Science Review, 2023, 10(12)), the purpose of strengthening condensation heat transfer is achieved together. Among them, the triangular pyramid fins 14 strengthen the heat transfer process by increasing the heat transfer area of the condensation section. It should be noted that compared with the fins 14 in the shape of a vertical wall, the triangular pyramid fins 14 are more conducive to the droplets sliding onto the hydrophilic material 15. At the same time, the cross-section of the hydrophilic material 15 is arched, and the droplets slide along the hydrophilic material 15, and through the Laplace pressure difference, the condensed droplets on the triangular pyramid fins 14 and the substrate 13 are transported to the hydrophilic material 15 directionally. Then, under the action of gravity and the shear force of the precursor water film of the hydrophilic material 15, they flow into the collection box through the condensate water outlet 16, so that the condensation sites are regenerated, and the thermal resistance caused by the condensate is reduced. On the outer wall surface of the cavity, there is a phase change heat storage material 17, and the phase change heat storage material 17 is connected to the cold end of the thermoelectric cooler 11 through a heat pipe.

[0057] It should be noted that the cold end of the thermoelectric cooler 11 cools the water-absorbing adsorbent material on the adsorption bed that has changed from the desorption process to the adsorption process and the condensate water module through a heat pipe at the same time. In order to ensure that the cold quantity preferentially reaches the normal temperature of the water-absorbing adsorbent material, the excess cold quantity is transmitted to the phase change heat storage material 17 in the condensate water module for storage and utilization, so as to avoid the excess cold quantity affecting the heat generation at the hot end through the self-heat conduction of the thermoelectric sheet. Using the principle of driving the cold quantity flow by temperature difference, the melting point of the phase change heat storage material 17 is set near the normal temperature. When the temperature of the water-absorbing adsorbent material has not reached the normal temperature, the temperature difference between the water-absorbing adsorbent material and the cold end is greater than the temperature difference between the condensate water module and the cold end, and more cold quantity flows into the water-absorbing adsorbent material. After the temperature of the water-absorbing adsorbent material reaches the normal temperature, the excess cold quantity is transmitted to the condensate water module.

[0058] The electrolytic hydrogen production module includes an alkaline electrolyzer 23, a water level monitoring device and a control valve. The alkaline electrolyzer 23 is electrically connected to the storage battery 21 in the photovoltaic power generation module. At the same time, the alkaline electrolyzer 23 is connected to the collection tank through the control valve. The water level monitoring device is arranged on the collection tank. The water level monitoring device converts the water level in the collection tank into an electrical signal and provides water level data. When the water level in the collection tank reaches a certain height, the control valve opens, water flows into the alkaline electrolyzer 23, and hydrogen is produced after the electric energy of the storage battery 21 flows in.

[0059] See Figure 3 , the electrical connection structure of the photovoltaic power generation module, the thermoelectric temperature control module 25 and the electrolytic hydrogen production module, includes a maximum power point tracking device (MPPT controller) 18, a first DC-DC converter 24 and a single-chip microcomputer control system 19; the thermoelectric temperature control module 25 and the electrical equipment module of the electrolytic hydrogen production module, the photovoltaic panel 20 is connected to the maximum power point tracking device 18, and the maximum power point of the photovoltaic panel 20 is tracked in real time to improve the energy utilization efficiency of the system. The second DC-DC converter inside the maximum power point tracking device 18 realizes voltage adaptation and is connected to the storage battery 21 to realize power compensation. The storage battery 21 realizes the energy storage function, is used to store surplus electric energy, realizes the load power balance under the light fluctuation, and supports the system to work at night at the same time. The maximum power point tracking device 18 is connected to the thermoelectric temperature control module 25 through the first DC-DC converter 23 arranged outside the maximum power point tracking device 18. The maximum power point tracking device 18 is connected to the alkaline electrolyzer 23 in the electrolytic hydrogen production module through the switching tube 22.

[0060] To achieve constant power temperature control, the first DC-DC converter is used to connect the DC output of the thermoelectric temperature control module 25 and the maximum power point tracking device. Through current and voltage sampling, combined with the single-chip microcomputer control system 19, the output voltage of the first DC-DC converter is adjusted to achieve constant power operation. The electrolytic hydrogen production module uses the alkaline electrolyzer 23 to electrolyze the water collected in the water collection part and convert it into hydrogen and output. To ensure that there is enough water to start electrolysis, by monitoring the water volume in the alkaline electrolyzer 23 and introducing hysteresis control, when the water volume is large, the single-chip microcomputer control system 19 intelligently starts electrolysis through the switching tube 22 according to the monitored water volume. When the water volume is small, the water volume is maintained within a fixed range, so as to realize intelligent intermittent start of electrolysis. This electrical connection relationship significantly improves the energy utilization rate and drives the operation of all modules through clean energy.

[0061] Embodiment 1

[0062] During an adsorption-desorption cycle, the rotary servo motor 10 drives the spline shaft 5 to rotate, so that the spline shaft 5 drives the rotary adsorption bed 3 to rotate. Water vapor is adsorbed by the water-absorbing adsorption material 4 in the rotary adsorption bed 3. When the water-absorbing adsorption material 4 after adsorption rotates above the thermoelectric cooler 11, the linear thrust motor 6 pushes the top cover 2 downward. A first spring is arranged on the spline shaft 5 between the top cover 2 and the adsorption bed 3, and a second spring is arranged on the spline shaft 5 between the adsorption bed 3 and the bottom plate 8. When the top cover 2 moves downward, the first spring and the second spring are compressed, so that the water-absorbing adsorption material 4 after adsorption is in close contact with the thermoelectric cooler 11. The thermoelectric cooler 11 heats the water-absorbing adsorption material 4 to raise its temperature, and the adsorbed water vapor is desorbed. The water vapor is discharged from the water vapor outlet and then enters the condensation and water collection module, and finally liquid water is obtained. At the same time, the water-absorbing adsorption material 4 that completed desorption last time is exposed to the air at this time, and changes from the desorption state to the adsorption state. After adsorption is completed, it can be rotated to the thermoelectric cooling module again to enter the next heating and desorption cycle. The rotary adsorption beds 3 are arranged at equal intervals, avoiding heat conduction between the adsorption beds. The liquid water is electrolyzed in the electrolytic hydrogen production module to be converted into hydrogen. Or the liquid water is used for domestic water or agricultural irrigation.

[0063] It should be noted that through the continuous rotation of the adsorption bed 3, compared with the existing multi-bed regenerative continuous adsorption device, the cumbersome manual switching of the operation mode is avoided; by the motor pushing the top cover 2 downward, the thermoelectric cooler 11 heats and desorbs the water-absorbing adsorption material 4, enabling continuous multi-bed adsorption and avoiding the heat loss problem of adsorption-desorption conversion existing in the single-bed continuous device. In addition, compared with the simple two-adsorption-bed form, the method of dividing the number of adsorption beds according to the ratio of the adsorption and desorption cycles can avoid the problem of the condensation and water collection module occupancy caused by the adsorption-desorption part during conversion.

[0064] The above is only an illustration of the best embodiment of the present invention, but it should not be construed as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to change. Any changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

Claims

1. An integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production, characterized in that, Including: A photovoltaic power generation module, a continuous multi-adsorption bed module, a thermoelectric temperature control module, a condensation water collection module, and an electrolytic hydrogen production module; The photovoltaic power generation module is connected to the thermoelectric temperature control module and the electrolytic hydrogen production module. The thermoelectric temperature control module is connected to the continuous multi-adsorption bed module and the condensation water collection module. The continuous multi-adsorption bed module is connected to the condensation water collection module. The condensation water collection module is connected to the electrolytic hydrogen production module.

2. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 1, wherein, The continuous multi-adsorption bed module includes a top cover (2), a spline shaft (5), a linear thrust motor (6), a bottom plate (8), a rotary servo motor (10), and a plurality of rotary adsorption beds (3). The rotary servo motor (10) drives the rotary adsorption beds (3) to rotate through the spline shaft (5). The top cover (2) includes a top plate, and a circular hole is opened in the middle of the top plate for sleeving on the spline shaft (5). A baffle is provided on the bottom surface of the top plate on one side of the circular hole, and a water vapor outlet (7) is provided on the baffle. The baffle and the top plate form a cuboid-shaped cavity, and there is a gap between the circular hole of the top cover (2) and the spline shaft (5). The rotary servo motor (10) is connected to the rotary adsorption bed (3), and the linear thrust motor (6) is located above the top cover (2); A water-absorbing adsorption material (4) is provided on the rotary adsorption bed (3); A spring damper (1) is provided between one end of the top cover (2) and one end of the bottom plate (8), and a spring damper (1) is also provided between the other end of the top cover (2) and the other end of the bottom plate (8); A first spring is provided on the spline shaft sleeve between the top cover (2) and the rotary adsorption bed (3), and a second spring is provided on the spline shaft sleeve between the rotary adsorption bed (3) and the bottom plate (8).

3. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 2, characterized in that, In the working state, the linear thrust motor (6) applies a downward force to the top cover (2). The top cover (2) compresses the spring damper (1) and the first spring. At the same time, the second spring is also compressed by the rotary adsorption bed (3). The baffle (2) compresses the water-absorbing adsorption material (4) downward, so that the water-absorbing adsorption material (4) is in close contact with the rotary adsorption bed (3). At this time, the water-absorbing adsorption material (4) is in the desorption state, and the rotary adsorption bed (3) where the water-absorbing adsorption material (4) in the desorption state is located is connected to the thermoelectric temperature control module.

4. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 3, characterized in that, The ratio of the desorption time to the adsorption time of the water-absorbing adsorption material (4) is (1):(3).

5. The integrated system combining photovoltaic power generation, continuous air water extraction and electrolytic hydrogen production according to claim 2, characterized in that, The condensation water collection module includes a cavity and a collection box. A water vapor inlet is provided at one end of the cavity, and a condensed water outlet (16) is provided at the other end of the cavity. The condensed water outlet (16) is communicated with the collection box. A water level monitoring device is provided on the collection box. A base material (13) is provided on the inner wall surface of the cavity, and a number of triangular pyramid fins (14) arranged in parallel are provided on the base material (13). A hydrophilic material (15) is provided between adjacent triangular pyramid fins (14).

6. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 5, wherein, A phase change heat storage material (17) is provided on the outer wall surface of the cavity of the condensation water collection module, and the phase change heat storage material (17) is connected to the thermoelectric temperature control module through a heat pipe.

7. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 2, characterized in that, The thermoelectric temperature control module includes a thermoelectric cooler (11) and a heat pipe (12). The thermoelectric cooler (11) includes a hot end and a cold end. The hot end is attached to the bottom of the adsorption bed in the desorption stage of the continuous multi-adsorption bed module; the cold end is connected to the rotary adsorption bed (3) in the adsorption stage of the continuous multi-adsorption bed module through a set of heat pipes (12), and at the same time, the cold end is connected to the phase change heat storage material (17) in the condensation water collection module through another set of heat pipes.

8. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 1, characterized in that, The electrolytic hydrogen production module includes an alkaline electrolytic cell (23) and a control valve. The photovoltaic power generation module is connected to the alkaline electrolytic cell (23), and the alkaline electrolytic cell (23) is connected to the condensation water collection module through the control valve.

9. The integrated system combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production according to claim 1, characterized in that, It also includes a maximum power point tracking device (18), a first DC-DC converter (24) and a single-chip microcomputer control system (19); The photovoltaic power generation module is connected to the maximum power point tracking device (18), the maximum power point tracking device (18) is connected to the storage battery (21), the maximum power point tracking device (18) is connected to the thermoelectric temperature control module through the first DC-DC converter (23), and the maximum power point tracking device (18) is connected to the electrolytic hydrogen production module through a switching tube (22).

10. A method for combining photovoltaic power generation, continuous air water intake and electrolytic hydrogen production based on the system described in claim 7, characterized in that, It includes the following steps: The rotary servo motor (10) drives the rotary adsorption bed (3) to rotate, and water vapor is adsorbed by the water-absorbing adsorption material (4) in the rotary adsorption bed (3). When the water-absorbing adsorption material (4) after adsorption is rotated above the thermoelectric cooler (11), the thrust linear motor (6) pushes the top cover (2) to move downward. When the top cover (2) moves downward, the first spring and the second spring are compressed, so that the water-absorbing adsorption material (4) after adsorption is closely attached to the thermoelectric cooler (11). The thermoelectric cooler (11) heats the water-absorbing adsorption material (4), and the adsorbed water vapor is desorbed by heating. The water vapor is discharged from the water vapor outlet (11) and then enters the condensation water collection module, and finally liquid water is obtained; at the same time, the water-absorbing adsorption material (4) that has completed the previous desorption is exposed to the air, and changes from the desorption state to the adsorption state. After adsorption is completed, it is rotated to the thermoelectric cooler (11) again to enter the next heating desorption cycle; the collected liquid water is electrolyzed in the electrolytic hydrogen production module to be converted into hydrogen.

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