Ion permeation energy conversion device and regulation method based on light energy and magnetic energy regulation

Abstract

An ion-permeation energy conversion device and its control method based on light and magnetic energy regulation are disclosed. When the ion-permeation energy conversion device is in working condition, the magnetic field strength of the permanent magnet is adjusted to disperse the magnetic nanoparticles, and the concentrator is adjusted to heat the ion-permeation energy conversion device body with photothermal magnetic nanoparticles to improve power generation performance. When the ion-permeation energy conversion device is in non-working condition, the magnetic field strength of the permanent magnet is adjusted to distribute the magnetic nanoparticles at the interface between the nanoselective membrane and the low-concentration reservoir to prevent ion transport, and the concentrator is adjusted to make the light intensity on the nanoselective membrane exceed the threshold to form a reverse driving force, further hindering ion diffusion and synergistically solving the self-discharge problem of the ion-permeation energy conversion device body.

Description

Technical Field

[0001] This invention relates to the field of power generation technology, and in particular to an ion permeation energy conversion device and control method based on light energy and magnetic energy regulation. Background Technology

[0002] Energy and environmental issues have become increasingly prominent with industrialization, urgently requiring the search for low-carbon, environmentally friendly, large-capacity, and renewable new energy sources to alleviate the energy crisis. Ocean energy, particularly its osmotic gradient energy, reaching up to 30 gigawatts, is hailed as "blue energy" and possesses enormous potential for power generation. Inspired by the high and low osmotic gradient power generation of electric eels, ion osmosis energy conversion utilizes the osmotic difference between high-concentration and low-concentration electrolyte solutions to drive single ions through an ion exchange membrane, creating a potential difference for power generation. This technology can be widely applied in river estuaries, islands, and wastewater treatment plants.

[0003] Current ion-osmosis energy conversion devices suffer from low power density and severe self-discharge. Regarding the low power density, most studies have focused on trial-and-error experiments to change the nanoselective membrane material to improve the osmosis current and diffusion potential, but these methods fail to address the root cause of the device's power generation performance. Self-discharge is an inherent problem of ion-osmosis energy conversion devices. Even without external circuitry, the osmotic difference drives ions to migrate from the high-concentration side to the low-concentration side, reducing the effective concentration ratio and thus affecting power generation performance. Almost no research has investigated or addressed this issue.

[0004] Light energy possesses advantages such as being ubiquitous, harmless, and having a massive potential. Furthermore, the development of magnetic energy is progressing rapidly, and it can be used to influence the distribution of magnetic nanoparticles. The advantages of light and magnetic energy inspire us to combine photomagnetic energy with the ion-osmosis energy conversion device itself to improve the power density of the ion-osmosis energy conversion device and solve the problem of self-discharge.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To address the shortcomings or defects of the existing technology, an ion-permeation energy conversion device and its control method based on light and magnetic energy regulation are provided. This ion-permeation energy conversion device improves power generation performance through heating with photothermal and magnetic nanoparticles, and solves the self-discharge phenomenon through photo-controlled and magnetic-controlled effects, thereby improving the overall power generation efficiency of the ion-permeation energy conversion device. The objective of this invention is achieved through the following technical solutions.

[0007] Ion permeation energy conversion devices based on light and magnetic energy modulation include,

[0008] The main body of the ion permeation energy conversion device includes,

[0009] High-concentration storage tanks are used to store high-concentration electrolyte solutions.

[0010] Low-concentration storage tank, which stores low-concentration electrolyte solutions and magnetic nanoparticles.

[0011] A nanoselective membrane selectively connects a high-concentration reservoir to a low-concentration reservoir. This nanoselective membrane selectively attracts ions of a single polarity while repelling ions of another polarity.

[0012] A pair of electrodes are inserted into a high-concentration reservoir and a low-concentration reservoir respectively to collect electrical energy converted from osmotic energy and output it to an external circuit.

[0013] Thermal storage material is wrapped around the body of the ion permeation energy conversion device;

[0014] A permanent magnet provides a magnetic field toward the low-concentration reservoir to regulate the distribution of the magnetic nanoparticles;

[0015] A concentrator, which is oriented toward the ion-permeable energy conversion device body to focus light energy onto a nanoselective membrane.

[0016] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the high-concentration electrolyte solution includes industrial waste brine, sodium chloride solution, and potassium chloride solution, while the low-concentration electrolyte solution includes seawater and river water.

[0017] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the nanoselective membrane includes carbon nanotubes or polyethylene terephthalate nanochannels. The nanoselective membrane has a light-controlled effect material or coating, thereby enabling the nanoselective membrane to have a light-controlled effect threshold of light intensity. When the irradiation intensity is less than the light-controlled effect threshold, the sign of the surface potential of the nanoselective membrane material remains unchanged, and when the irradiation intensity is greater than the light-controlled effect threshold, the sign of the surface potential of the nanoselective membrane material changes.

[0018] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the magnetic nanoparticles include magnetite nanoparticles, cobalt magnetic nanoparticles, or nickel magnetic nanoparticles, and the diameter of the magnetic nanoparticles is 10 to 50 nanometers.

[0019] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the permanent magnet includes rare earth permanent magnet material or ferrite permanent magnet material. The magnetic field strength can be changed by replacing the material of the permanent magnet or adjusting the distance between the permanent magnet and the low-concentration storage tank.

[0020] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, when the magnetic field strength of the permanent magnet is less than the predetermined magnetic field strength, the magnetic nanoparticles are dispersed to cooperate with the photothermal effect to heat the body of the ion permeation energy conversion device. When the magnetic field strength of the permanent magnet is greater than the predetermined magnetic field strength, the magnetic nanoparticles spread at the interface between the nanoselective membrane and the low-concentration storage pool to cut off ion transport.

[0021] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the surface of the magnetic nanoparticles has the same polarity as the surface of the nanoselective membrane.

[0022] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the concentrator is turned on to provide light intensity higher than the light control effect threshold of the nanoselective membrane material, thereby generating a reverse driving force within the nanochannel to weaken ion migration.

[0023] In the aforementioned ion permeation energy conversion device based on light and magnetic energy regulation, the thermal storage materials include phase change thermal storage materials, chemical thermal storage materials, and composite thermal storage materials.

[0024] A method for controlling an ion permeation energy conversion device based on light and magnetic energy includes the following steps:

[0025] Step S1: When the ion permeation energy conversion device is in operation, change the material of the permanent magnet or adjust the distance between the permanent magnet and the low-concentration storage tank to change the magnetic field strength, so that the magnetic field strength of the permanent magnet is less than the predetermined magnetic field strength, so that the magnetic nanoparticles are dispersed in the low-concentration storage tank. Adjust the focusing angle of the concentrator so that the light intensity on the nano-selective membrane does not exceed the light control effect threshold, thereby heating the ion permeation energy conversion device with photothermal magnetic nanoparticles.

[0026] Step S2: When the ion permeation energy conversion device is not in operation, change the material of the permanent magnet or adjust the distance between the permanent magnet and the low-concentration storage tank to change the magnetic field strength, so that the magnetic field strength of the permanent magnet is greater than the predetermined magnetic field strength, so that the magnetic nanoparticles are distributed at the interface between the nano-selective membrane and the low-concentration storage tank to prevent ion transport. Adjust the focusing angle of the concentrator so that the light intensity on the nano-selective membrane exceeds the light control effect threshold to form a reverse driving force, further hindering the diffusion of ions, and synergistically solving the self-discharge problem of the ion permeation energy conversion device.

[0027] Compared with the prior art, the beneficial effects of this invention are as follows:

[0028] The ion-permeation energy conversion device of this invention can utilize light and magnetic energy to regulate the device's operating and non-operating states to improve energy utilization efficiency. In the operating state, photothermal and magnetic nanoparticles, combined with the surface selectivity of magnetic nanoparticles, increase the temperature of the ion-permeation energy conversion device body to enhance power generation. In the non-operating state, magnetic energy regulates the distribution of magnetic nanoparticles at the nano-selective membrane channel openings to cut off ion transport, and combined with light energy to regulate the nano-selective membrane to generate a reverse driving force, achieving a gating effect for the ion-permeation energy conversion device body under synergistic action, thus solving the self-discharge problem. This invention effectively regulates the ion-permeation energy conversion device body to improve power generation performance and extend its service life, resulting in significant social and economic benefits. It can be widely applied in the field of ion-permeation energy conversion power generation technology.

[0029] The description provided is merely an overview of the technical solution of this invention. In order to make the technical means of this invention clearer and more understandable, so that those skilled in the art can implement it according to the contents of the specification, and to make the described and other objects, features and advantages of this invention more obvious and understandable, specific embodiments of this invention are described below. Attached Figure Description

[0030] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0031] In the attached diagram:

[0032] Figure 1 A schematic diagram of an ion permeation energy conversion device based on light and magnetic energy modulation, provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of an enhanced power generation structure for an ion penetration energy conversion device based on light and magnetic energy regulation, provided in another embodiment of the present invention;

[0034] Figure 3 A bar chart showing the enhanced power generation results of an ion penetration energy conversion device based on light and magnetic energy regulation, provided for another embodiment of the present invention;

[0035] Figure 4A schematic diagram of the structure of an ion permeation energy conversion device based on light and magnetic energy regulation to solve the self-discharge problem, provided for another embodiment of the present invention;

[0036] Figure 5 A current result diagram of a light- and magnetic-energy-controlled ion permeation energy conversion device provided for another embodiment of the present invention.

[0037] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0038] The following will refer to the appendix. Figures 1 to 5 Specific embodiments of the invention will be described in more detail below. While specific embodiments of the invention are shown in the accompanying drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0039] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments for carrying out the invention; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of the invention. The scope of protection of this invention is determined by the appended claims.

[0040] To facilitate understanding of the embodiments of the present invention, the following will provide further explanation and description with reference to the accompanying drawings and several specific embodiments, and the accompanying drawings do not constitute a limitation on the embodiments of the present invention.

[0041] To better understand, such as Figure 1 As shown, the ion permeation energy conversion device based on light and magnetic energy regulation includes,

[0042] The main body 1 of the ion permeation energy conversion device consists of a high-concentration storage tank 2, an electrode 3, a nano-selective membrane 4, and a low-concentration storage tank 5.

[0043] High-concentration storage tank 2 is used to store high-concentration electrolyte solutions.

[0044] Electrode 3 is used to collect the electrical energy converted from osmotic energy and output it to the external circuit.

[0045] Nanoselective membrane 4, which selectively attracts ions of a single polarity while repelling ions of another polarity.

[0046] Low-concentration storage tank 5 is used to store low-concentration electrolyte solutions and magnetic nanoparticles 6.

[0047] Magnetic nanoparticles 6 are located in a low-concentration storage tank and are modulated by the magnetic field generated by permanent magnet 7.

[0048] The permanent magnet 7 provides a magnetic field to modulate the distribution of the magnetic nanoparticles 6.

[0049] Concentrator 8 is used to focus light energy onto the body 1 of the ion permeation energy conversion device to improve light energy utilization.

[0050] The heat storage material 9, which covers the body 1 of the ion permeation energy conversion device, is used to absorb or release excess heat energy, thereby prolonging the time that temperature affects the body 1 of the ion permeation energy conversion device.

[0051] Preferably, in the device, the high-concentration and low-concentration electrolyte solutions in the high-concentration storage tank 2 and the low-concentration storage tank 5 include, but are not limited to, seawater and river water, high-concentration and low-concentration industrial waste brine, high-concentration and low-concentration sodium chloride solution, and high-concentration and low-concentration potassium chloride solution.

[0052] Preferably, in the device, the nanoselective film 4 material includes, but is not limited to, carbon nanotubes and polyethylene terephthalate nanochannels. The nanoselective film is selected from materials or coatings with light control effects, thereby enabling the nanoselective film to have a light control effect threshold for light intensity. When the irradiation intensity is less than the light control effect threshold, the sign of the surface potential of the nanoselective film 4 material remains unchanged, and when the irradiation intensity is greater than the light control effect threshold, the sign of the surface potential of the nanoselective film 4 material changes.

[0053] Preferably, in the device, the magnetic nanoparticles 6 include, but are not limited to, magnetite nanoparticles 6, cobalt magnetic nanoparticles 6, and nickel magnetic nanoparticles 6. The diameter of the magnetic nanoparticles 6 is 10-50 nanometers, which is larger than the channel diameter of the nanoselective membrane 4. This ensures that the magnetic nanoparticles 6 exist only in the low-concentration reservoir 5 and do not enter the channels to block the nanochannels.

[0054] Preferably, in the device, the material of the permanent magnet 7 includes, but is not limited to, rare earth permanent magnet materials and ferrite permanent magnet materials. The material of the permanent magnet 7 can be replaced or the distance between the permanent magnet 7 and the body 1 of the ion permeation energy conversion device can be adjusted to change the magnetic field strength.

[0055] Preferably, in the device, when the magnetic field strength of the permanent magnet 7 is relatively low, the magnetic nanoparticles 6 are dispersed to cooperate with the photothermal effect in heating the body 1 of the ion penetration energy conversion device.

[0056] Preferably, in the device, when the magnetic field strength of the permanent magnet 7 is large, the magnetic nanoparticles 6 spread at the interface between the nanoselective membrane 4 and the low-concentration storage pool to cut off ion transport.

[0057] Preferably, in the device, the concentrator 8 is turned on to provide light intensity higher than the material threshold of the nanoselective film 4, thereby generating a reverse driving force within the nanochannel to weaken ion migration.

[0058] Preferably, in the device, the heat storage material 9 includes, but is not limited to, phase change heat storage materials, chemical heat storage materials and composite heat storage materials, such as paraffin with added metal powder, hydrated saline thermochemical adsorption materials, etc.

[0059] In one embodiment, the ion permeation energy conversion device body 1 is a transparent container, which is divided into a high-concentration reservoir 2 and a low-concentration reservoir 5 by a nanoselective membrane 4.

[0060] In one embodiment, such as Figure 2 As shown, by controlling the magnetic field strength of the permanent magnet 7, the magnetic nanoparticles 6 are dispersed on the low-concentration side. Adjusting the concentrator 8 ensures the light intensity on the nanoselective membrane 4 does not exceed a threshold, heating the ion permeation energy conversion device body 1 to improve power generation performance. Simultaneously, the magnetic nanoparticles 6 have the same polarity as the nanoselective membrane 4. The magnetic nanoparticles 6 near the channels of the nanoselective membrane 4 can continue to attract ions of a single polarity, such as sodium ions, while repelling ions of another polarity, such as potassium ions, thereby extending the distance at which ions are selected to enhance selectivity and improve power generation performance. The improvement in power generation performance through the control of light and magnetic energy can be explained by the Nernst-Planck formula, the ion diffusion coefficient formula, the Debye length formula, and the ion selectivity formula.

[0061] Nernst-Planck equations:

[0062] Formula for ion diffusion coefficient: D i =D i，m [1+0.025(TT m )]

[0063] Debye length formula:

[0064] Ion selectivity formula:

[0065] In the formula, For partial differential operators, c i Let z be the ion concentration of the i-th ion. i Let D be the valence charge of the i-th ion. i Let α be the diffusion coefficient of the i-th ion. iJ is the simplified Soret coefficient for the i-th ion. i Let be the ion flux of the i-th type of ion, where i = 1 represents cations, i = 2 represents anions, u is the velocity, B is the magnetic field strength, and R is the magnetic flux. g Here, T is the universal gas constant, V is the temperature, and v is the dielectric constant. Let F be the electric potential, and T be the Faraday constant. m For characteristic temperature, D i,m λ is the ion diffusion coefficient at the characteristic temperature. D For Debye length, I c η is the ionic strength. s For ion selectivity, σ is the surface charge density, and R is the radius of the nanochannel.

[0066] When the photothermal and magnetic nanoparticles 6 are used to heat the body 1 of the ion permeation energy conversion device via light and magnetic energy modulation, the temperature rises. On one hand, as shown by the formula, the ion diffusion coefficient increases with increasing temperature, indicating a faster ion diffusion rate, resulting in greater ion flux and ion current, thus enhancing power generation. On the other hand, the Debye length reflects the thickness of the double layer of the nano-selective membrane 4; a thicker double layer indicates stronger selectivity. As shown by the formula, the Debye length increases with increasing temperature, leading to stronger selectivity and enhanced power generation. Furthermore, the surface of the magnetic nanoparticles 6 shares the same polarity as the surface of the nano-selective membrane 4. According to the ion selectivity formula, the magnetic nanoparticles 6 enhance the selectivity of the nano-selective membrane 4, increasing the surface charge density and thus strengthening ion selectivity. These effects synergistically enhance the power generation process of ion permeation energy conversion.

[0067] In one embodiment, such as Figure 3 As shown, the enhanced power generation results and baseline power generation results of the ion penetration energy conversion device based on light and magnetic energy regulation are compared. Both operating conditions use a 0.05 / 0.001M sodium chloride solution. The nanoselective membrane 4 is a graphene oxide membrane with a 1nm interlayer spacing, and the electrode 3 is a silver / silver chloride electrode pair. Furthermore, the magnetic nanoparticles 6 are 10nm diameter magnetite nanoparticles, the permanent magnet 7 is a 0.15T neodymium iron boron permanent magnet, and the light simulator is set to 1kW / m². 2 For a given solar radiation intensity, paraffin phase change material was selected as the thermal storage material. Experimental testing showed that the power density under baseline conditions at room temperature (298K) was only 2.41 W / m³. 2 The temperature of the ion-permeation energy conversion device body 1, which is controlled by light and magnetic energy, rises to 345K after being reinforced with photothermal and magnetic nanoparticles. Simultaneously, due to the improved ion diffusion coefficient and enhanced selectivity of the nano-selective membrane, the power density reaches 8.62 W / m². 2The improvement rate is as high as 257.68%. This shows that the ion permeation energy conversion device based on light and magnetic energy regulation can significantly improve power generation performance in operation.

[0068] In one embodiment, such as Figure 4 As shown, the ion permeation energy conversion device based on light and magnetic energy regulation can solve the problem of self-discharge in the non-operating state. When the main body 1 of the ion permeation energy conversion device is in a non-operating state, the magnetic nanoparticles 6 are distributed at the interface between the nano-selective membrane 4 and the low-concentration reservoir 5 by regulating the magnetic field strength of the permanent magnet 7 to prevent ion transport. Furthermore, the light intensity on the nano-selective membrane 4 is adjusted by adjusting the concentrator 8 so that it exceeds the threshold, and the surface charge of the nano-selective membrane 4 changes accordingly, forming a driving force opposite to the concentration gradient. On the one hand, the magnetic nanoparticles 6 cut off the path of ion migration from the high-concentration side to the low-concentration side; on the other hand, the reverse driving force generated by the light-controlled nano-selective membrane 4 cancels the original concentration gradient driving force. The coupling effect of these two factors prevents ions from migrating from the high-concentration side to the low-concentration side and thus prevents self-discharge, improving energy utilization efficiency.

[0069] In one embodiment, such as Figure 5 As shown, the current results of the ion permeation energy conversion device based on light and magnetic energy regulation were obtained experimentally. The experimental conditions used a 0.05 / 0.001M sodium chloride solution. The nanoselective membrane 4 was a graphene oxide membrane with a 1nm interlayer spacing. Electrode 3 was a silver / silver chloride electrode pair. The magnetic nanoparticles 6 were selected as 10nm diameter iron oxide magnetic nanoparticles. When the ion permeation energy conversion device body 7 was working, the permanent magnet 7 was a 0.15T neodymium iron boron permanent magnet, and the light simulator simulated 1kW / m². 2 A solar radiation intensity. When the ion penetration energy conversion device body 1 stops working, a 0.45T neodymium iron boron permanent magnet 7 is selected as the permanent magnet, and the light simulator simulates 2kW / m². 2 The two solar radiation intensities. (By...) Figure 5 It is known that a lower magnetic field strength allows the magnetic nanoparticles 6 to disperse within the concentration range, while light intensity not exceeding the threshold allows ions to migrate normally from the high-concentration side to the low-concentration side. Therefore, a significant current value can be observed under the light-magnetic energy control pathway. When the magnetic field strength increases to 0.45T, the magnetic nanoparticles 6 are adhered to the interface between the nanoselective membrane 4 and the low-concentration reservoir 5 by the magnetic force, blocking the passage of ions. Further light intensity exceeding the threshold of the nanoselective membrane 4 exhibits a reverse driving force, further ensuring that ions do not migrate down the concentration gradient and cause self-discharge. Thus, it can be observed that when the light-magnetic energy control circuit is broken, the current is close to 0.

[0070] In another embodiment, the control method of the ion permeation energy conversion device based on light and magnetic energy control includes the following steps:

[0071] Step S1: When the ion permeation energy conversion device body 1 is in working condition, change the material of the permanent magnet 7 or adjust the distance between the permanent magnet 7 and the low concentration storage tank 5 to change the magnetic field strength, so that the magnetic field strength of the permanent magnet 7 is less than the predetermined magnetic field strength, so that the magnetic nanoparticles 6 are dispersed in the low concentration storage tank 5, and adjust the focusing angle of the concentrator 8 so that the light intensity on the nano-selective membrane 4 does not exceed the light control effect threshold, thereby heating the ion permeation energy conversion device body 1 with photothermal magnetic nanoparticles 6.

[0072] Step S2: When the ion permeation energy conversion device body 1 is in a non-working state, change the material of the permanent magnet 7 or adjust the distance between the permanent magnet 7 and the low concentration storage tank 5 to change the magnetic field strength, so that the magnetic field strength of the permanent magnet 7 is greater than the predetermined magnetic field strength, so that the magnetic nanoparticles 6 are distributed at the interface between the nano-selective membrane 4 and the low concentration storage tank 5 to prevent ion transport. Adjust the focusing angle of the concentrator 8 so that the light intensity on the nano-selective membrane 4 exceeds the light control effect threshold to form a reverse driving force, further hindering the diffusion of ions, and synergistically solving the self-discharge problem of the ion permeation energy conversion device body 1.

[0073] It should be noted that the heating described in this invention can be volume heating as understood by those skilled in the art.

[0074] Industrial applicability

[0075] The ion permeation energy conversion device and method based on light and magnetic energy regulation described in this invention can be manufactured and used in the field of power generation.

[0076] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0077] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An ion permeation energy conversion device based on light and magnetic energy regulation, characterized in that, It includes, The main body of the ion permeation energy conversion device includes, High-concentration storage tanks are used to store high-concentration electrolyte solutions. Low-concentration storage tank, which stores low-concentration electrolyte solutions and magnetic nanoparticles. A nanoselective membrane selectively connects a high-concentration reservoir to a low-concentration reservoir. The nanoselective membrane selectively attracts ions of a single polarity while repelling ions of another polarity. A pair of electrodes are inserted into a high-concentration reservoir and a low-concentration reservoir respectively to collect electrical energy converted from osmotic energy and output it to an external circuit. Thermal storage material is wrapped around the body of the ion permeation energy conversion device; A permanent magnet provides a magnetic field toward the low-concentration reservoir to regulate the distribution of the magnetic nanoparticles; A concentrator, which is oriented toward the ion-permeable energy conversion device body to focus light energy onto a nanoselective membrane; Among them, the nanoselective film includes carbon nanotubes or polyethylene terephthalate nanochannels. The nanoselective film has a light-controlling effect material or coating, so that the nanoselective film has a light-controlling effect threshold of light intensity. When the irradiation intensity is less than the light-controlling effect threshold, the sign of the surface potential of the nanoselective film material remains unchanged. When the irradiation intensity is greater than the light-controlling effect threshold, the sign of the surface potential of the nanoselective film material changes. When the magnetic field strength of the permanent magnet is less than the predetermined magnetic field strength, the magnetic nanoparticles are dispersed to heat the body of the ion permeation energy conversion device in conjunction with the photothermal effect. When the magnetic field strength of the permanent magnet is greater than the predetermined magnetic field strength, the magnetic nanoparticles spread at the interface between the nanoselective membrane and the low-concentration storage pool to cut off ion transport.

2. The ion permeation energy conversion device based on regulation of light and magnetic energy according to claim 1, characterized in that, High-concentration electrolyte solutions include industrial waste brine, sodium chloride solution, and potassium chloride solution, while low-concentration electrolyte solutions include seawater and river water.

3. The ion permeation energy conversion device based on light and magnetic energy regulation as described in claim 1, characterized in that, Magnetic nanoparticles include magnetite nanoparticles, cobalt magnetic nanoparticles, or nickel magnetic nanoparticles.

4. The ion permeation energy conversion device based on light and magnetic energy regulation as described in claim 1, characterized in that, Permanent magnets include rare earth permanent magnet materials or ferrite permanent magnet materials. The magnetic field strength can be changed by replacing the material of the permanent magnet or adjusting the distance between the permanent magnet and the low-concentration storage tank.

5. The ion permeation energy conversion device based on light and magnetic energy regulation as described in claim 1, characterized in that, The surface of the magnetic nanoparticles has the same polarity as the surface of the nanoselective film.

6. The ion permeation energy conversion device based on light and magnetic energy regulation as described in claim 1, characterized in that, The concentrator is turned on to provide light intensity higher than the light control effect threshold of the nanoselective film material, which generates a reverse driving force in the nanochannel to weaken ion migration.

7. The ion permeation energy conversion device based on photonic and magnetic energy regulation according to claim 1, wherein, Thermal storage materials include phase change thermal storage materials, chemical thermal storage materials, and composite thermal storage materials.

8. A method for controlling an ion permeation energy conversion device based on light and magnetic energy control as described in any one of claims 1-7, characterized in that, It includes the following steps: Step S1: When the ion permeation energy conversion device is in operation, change the material of the permanent magnet or adjust the distance between the permanent magnet and the low-concentration storage tank to change the magnetic field strength, so that the magnetic field strength of the permanent magnet is less than the predetermined magnetic field strength, so that the magnetic nanoparticles are dispersed in the low-concentration storage tank. Adjust the focusing angle of the concentrator so that the light intensity on the nano-selective membrane does not exceed the light control effect threshold, thereby heating the ion permeation energy conversion device with photothermal magnetic nanoparticles. Step S2: When the ion permeation energy conversion device is not in operation, change the material of the permanent magnet or adjust the distance between the permanent magnet and the low-concentration storage tank to change the magnetic field strength, so that the magnetic field strength of the permanent magnet is greater than the predetermined magnetic field strength, so that the magnetic nanoparticles are distributed at the interface between the nano-selective membrane and the low-concentration storage tank to prevent ion transport. Adjust the focusing angle of the concentrator so that the light intensity on the nano-selective membrane exceeds the light control effect threshold to form a reverse driving force, further hindering the diffusion of ions, and synergistically solving the self-discharge problem of the ion permeation energy conversion device.

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