A sustainable power generation device

Abstract

This application belongs to the field of new energy technology, and specifically relates to a sustainable power generation device. Existing power generation devices are non-recyclable and costly. This application provides a sustainable power generation device, including an interconnected power generation mechanism and an energy storage mechanism. The power generation mechanism includes an interconnected salinity gradient power generation component and a thermoelectric power generation component. The salinity gradient power generation component includes a transparent cover, a seawater storage tank, a membrane stack plate, and a freshwater storage tank connected in sequence. The freshwater storage tank is connected to a unidirectional electric drainage pump. The thermoelectric power generation component includes a thermoelectric generator plate, which has a hot end and a cold end. The hot end is connected to a porous heat absorber plate, which is disposed within the seawater storage tank. The cold end is connected to a cold end holding unit. The membrane stack plate is connected to the energy storage mechanism, and the thermoelectric generator plate is connected to the energy storage mechanism. This device can provide continuous power and is maintenance-free, reducing costs.

Description

Technical Field

[0001] This application belongs to the field of new energy technology, and in particular relates to a sustainable power generation device. Background Technology

[0002] Human activities at sea require a continuous supply of energy. Some low-energy-consuming but continuously operating devices, such as buoys and marine environmental monitoring devices, currently rely primarily on solar panels for power. Monocrystalline silicon solar cells have become the mainstream in large-scale commercial applications and industrial production. However, the production process of high-purity silicon materials is complex, consumes a large amount of energy, is costly, and is not environmentally friendly. Furthermore, the power generation efficiency of solar cells depends on factors such as solar radiation intensity and the angle of the photovoltaic panel, and is affected by factors such as cloudy skies, overcast skies, precipitation, and time of day. Meanwhile, marine buoys and marine environmental monitoring devices require stable, 24-hour operation. Therefore, it is necessary to address the reliability issues of energy supply for seawater monitoring devices from a single power source, while also reducing costs.

[0003] Salinity gradient energy (SGR) refers to the chemical potential difference energy between seawater and freshwater, or between two types of seawater with different salinity concentrations. Seawater typically has a salinity of 3.5%, and the theoretical energy density of its chemical potential difference with freshwater is equivalent to a 240 m head difference. It is estimated that the salinity gradient energy in the world's estuaries reaches 30 TW, of which 2.6 TW is potentially usable, possessing significant commercial value. Currently, there are two main methods for utilizing salinity gradient energy: pressure delayed osmosis (PRO) and reverse electrodialysis (RED). From a commercial and sustainable development perspective, RED technology, which directly converts chemical potential energy into electrical energy, has advantages such as lower investment costs and higher energy density. When applied to floating marine exploration devices, a crucial issue is obtaining the necessary freshwater.

[0004] The temperature difference between different water layers in the ocean is significant, with a noticeable temperature difference between the surface and underwater layers. Thermoelectric power generation is a form of ocean energy that can be utilized. When the two ends of a conductor or semiconductor are at different temperatures, an electromotive force (EMF) is generated in the circuit. This effect is called the Seebeck effect, and the corresponding EMF is called thermoelectric potential. A thermoelectric generator utilizes the Seebeck effect to directly convert heat energy into electrical energy. Based on the Peltier effect, p-type and n-type thermoelectric materials can be made into π-type elements. A certain number of π-type elements are welded onto a highly thermally conductive insulating ceramic substrate in a series connection for conductivity and a parallel connection for thermal conductivity to form a thermoelectric device. A resistor R is connected to the open circuit terminal of the thermoelectric device. L If a heat flow is input to the hot side of a thermoelectric cell, creating a temperature difference between the hot and cold ends of the thermoelectric cell, a current will flow through the circuit, and the load will receive electrical power I. 2 RL This led to the development of a generator that directly converts heat energy into electrical energy. Thermoelectric generators exhibit linear volt-ampere characteristics, unlike solar cells and chemical cells, and their output characteristics are highly sensitive to changes in ambient temperature.

[0005] For equipment such as buoys and marine environmental monitoring devices that require long-term stable power supply, a comprehensive approach that utilizes solar energy, salinity gradient power generation, thermoelectric power generation, and wave energy is necessary to ensure a safe and reliable energy supply. In addition, these devices are often non-recyclable and have high costs. Summary of the Invention

[0006] 1. Technical problems to be solved

[0007] For equipment such as buoys and marine environmental monitoring devices that require long-term stable power supply, a safe and reliable energy supply can only be ensured by comprehensively utilizing solar energy, salinity gradient power generation, thermoelectric power generation, and wave energy. In addition, these devices are often non-recyclable and have high costs. This application provides a sustainable power generation device.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, this application provides a sustainable power generation device, comprising an interconnected power generation mechanism and an energy storage mechanism. The power generation mechanism includes an interconnected salinity gradient power generation component and a thermoelectric power generation component. The salinity gradient power generation component includes a transparent cover, a seawater storage tank, a membrane stack plate, and a freshwater storage tank connected in sequence. The freshwater storage tank is connected to a unidirectional electric drainage pump. The thermoelectric power generation component includes a thermoelectric generator plate, which has a hot end and a cold end. The hot end is connected to a porous heat absorber plate, which is disposed within the seawater storage tank. The cold end is connected to a cold end holding unit. The membrane stack plate is connected to the energy storage mechanism, and the thermoelectric generator plate is connected to the energy storage mechanism.

[0010] Another embodiment provided in this application is: a one-way check valve is provided on the seawater storage device.

[0011] Another embodiment provided in this application is: the seawater storage device includes a condensate collection unit, which is connected to the freshwater storage tank.

[0012] Another embodiment provided in this application is as follows: the condensate collection unit includes a condensate collection tank, which is disposed on the outer edge of the seawater storage tank. The condensate collection tank is connected to a manifold, which is disposed inside the seawater storage tank. The manifold is connected to a conduit, which passes through the membrane stack and is connected to the freshwater storage tank.

[0013] Another embodiment provided in this application is as follows: the membrane stack plate is in the shape of a folded fan, the membrane stack plate includes a partition plate, an ion membrane is disposed on the partition plate, the ion membrane includes anion membrane and cation membrane, the anion membrane and the cation membrane are alternately arranged on the partition plate, an electrode is disposed on the partition plate, and the electrode is connected to the energy storage mechanism.

[0014] Another embodiment provided in this application is that the cation membrane is a molecular sieve / PVDF composite membrane.

[0015] Another embodiment provided in this application is as follows: the molecular sieve / PVDF composite membrane is prepared by phase inversion method to prepare PVDF / molecular sieve base membrane, and then obtained by grafting styrene and sulfonation.

[0016] Another embodiment provided in this application is as follows: the cold end holding unit includes a heat dissipation base, the heat dissipation base is disposed between the thermoelectric generator and the membrane stack plate, and the heat dissipation base, heat conduction pipe and heat dissipation fins are connected in sequence.

[0017] Another embodiment provided in this application is: the thermoelectric generator includes 4 semiconductor generators.

[0018] Another embodiment provided in this application is that the heat exchange medium in the heat pipe is an ethylene glycol solution, a propylene glycol solution, or a combination of an ethylene glycol solution and a propylene glycol solution.

[0019] 3. Beneficial effects

[0020] Compared with existing technologies, the beneficial effects of the sustainable power generation device provided in this application are as follows:

[0021] The sustainable power generation device provided in this application is an optimized and structurally combined environmentally friendly sustainable DC power generation technology. By optimizing salinity gradient power generation and thermoelectric gradient power generation methods, the two power generation methods are efficiently coupled. In a marine environment, this device can provide continuous power supply, is maintenance-free, and reduces costs.

[0022] The sustainable power generation device provided in this application is an optimized salinity gradient power generation and thermoelectric power generation coupled together, that is, the salinity gradient battery and the thermoelectric power generation device work together to achieve stable power supply for marine buoys and marine environmental detection devices, and effectively reduce the cost of power supply devices.

[0023] The sustainable power generation device provided in this application utilizes a combination of salinity gradient power generation technology and thermoelectric power generation technology to construct a new system for high-efficiency DC power generation at sea. In the natural marine environment, it achieves an organic combination of salinity gradient power generation, solar thermal conversion, and thermoelectric power generation, thereby maximizing energy conversion efficiency.

[0024] The sustainable power generation device provided in this application realizes the full utilization of solar and environmental thermal energy and ocean salinity gradient energy. At the same time, the coupling of salinity gradient and temperature gradient power generation can solve the problem of traditional photovoltaic power generation being affected by time and weather. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the sustainable power generation device structure of this application;

[0026] Figure 2 This is an exploded schematic diagram of the structure of the sustainable power generation device of this application;

[0027] Figure 3 This is a partial schematic diagram of the structure of the sustainable power generation device of this application;

[0028] Figure 4 This is a schematic diagram of the thermoelectric power generation component structure of this application;

[0029] Figure 5 This is a schematic diagram of the modified cation exchange membrane and salinity gradient power generation performance data of this application;

[0030] Figure 6 This is a schematic diagram of the thermoelectric power generation performance data of this application. Detailed Implementation

[0031] In the following, specific embodiments of this application will be described in detail with reference to the accompanying drawings. Based on these detailed descriptions, those skilled in the art will be able to clearly understand and implement this application. Without departing from the principles of this application, features from various embodiments can be combined to obtain new implementations, or certain features from some embodiments can be substituted to obtain other preferred implementations.

[0032] See Figures 1-6 This application provides a sustainable power generation device, including an interconnected power generation mechanism and an energy storage mechanism 8. The power generation mechanism includes an interconnected salinity gradient power generation component and a thermoelectric power generation component. The salinity gradient power generation component includes a transparent cover 1, a seawater storage tank 2, a membrane stack plate 6, and a freshwater storage tank 7 connected in sequence. The freshwater storage tank 7 is connected to a one-way electric drainage pump 71. The thermoelectric power generation component includes a thermoelectric generator 4, which has a hot end and a cold end. The hot end is connected to a porous heat absorber plate 3, which is disposed inside the seawater storage tank 2. The cold end is connected to a cold end holding unit 5. The membrane stack plate 6 is connected to the energy storage mechanism 8, and the thermoelectric generator 4 is connected to the energy storage mechanism 8. The lower part of the seawater storage tank 2 is filled with a black porous heat absorber plate 3 to absorb solar heat and heat the seawater inside the seawater storage tank 2.

[0033] This invention relates to a method for coupling salinity gradient power generation and thermoelectric power generation. Through a rationally designed device structure, thermoelectric power generation and salinity gradient power generation are combined. For system details, please refer to [link to system details]. Figure 1 The specific plan is as follows:

[0034] Obtaining fresh water using sunlight

[0035] like Figure 3 As shown in the diagram and its cross-sectional view, the top of the salinity gradient power generation unit is an arched transparent cover 1, used for light transmission and water vapor collection. Seawater in the seawater storage tank 2 is heated by sunlight, causing water vapor to condense into droplets on the inner surface of the transparent cover. This condensate then flows along the inner wall of the transparent cover into the freshwater storage tank 7. Once the freshwater storage tank 7 is full, the reverse electrodialysis power generation system begins operation. When the condensate accumulates to a preset height, the pressure at the drain outlet of the freshwater storage tank reaches a preset value, and a one-way electric drain pump discharges all excess freshwater.

[0036] Salinity gradient power generation

[0037] like Figure 3 The exploded view of the salinity gradient power generation structure shows that salinity gradient power generation is mainly accomplished by means of membrane stack plate 6, which separates the concentrated seawater 25 in the seawater storage tank 2 and the condensed freshwater 72 in the freshwater storage tank 7 above the membrane stack, so as to form anion and cation electrode chambers and realize reverse electrodialysis salinity gradient power generation.

[0038] Thermoelectricity

[0039] like Figure 4 As shown in the partial diagram of the thermoelectric power generation structure, the thermoelectric power generation module based on the Seebeck effect can maintain a temperature difference between the cold and hot ends of the thermoelectric power generation piece 4, ensuring a high power generation efficiency.

[0040] Storage of generated energy

[0041] like Figure 2 As shown, the system employs energy storage mechanism 8 to store energy from salinity gradient power generation and thermoelectric power generation, and provides unified power supply to the device to achieve stable energy output. Furthermore, by adjusting the positions of relevant components and the counterweight of the device, the stability of the device is improved.

[0042] Furthermore, the seawater storage tank 2 is equipped with a one-way check valve 22. Seawater enters the seawater storage tank 2 through the one-way check valve 22, and the waterline of the entire device is controlled to be level with the one-way check valve 22 by adjusting the center of gravity. When seawater evaporates and the water level in the seawater storage tank 2 is lower than the external sea surface, seawater can automatically flow in through the one-way check valve 22 to replenish the water.

[0043] Further, the seawater storage tank 2 includes a condensate collection unit, which is connected to the freshwater storage tank 7. Specifically, the condensate collection unit includes a condensate collection tank 21, which is located on the outer edge of the seawater storage tank 2. The condensate collection tank 21 is connected to a manifold 23, which is located inside the seawater storage tank 2 and is connected to a conduit. The conduit passes through the membrane stack plate 6 and is connected to the freshwater storage tank 7. The conduit includes three sections: a first conduit 24, a second conduit 63, and a third conduit 73, which are connected sequentially. The conduit enters the condensate collection tank 21 on the outer edge of the seawater storage tank 2, and then flows along the manifold 23 into the first conduit 24, the second conduit 63, and the third conduit 73 until it is stored in the freshwater storage tank 7.

[0044] Furthermore, the membrane stack 6 is folded fan-shaped, the membrane stack 6 includes a partition 64, an ion membrane 62 is disposed on the partition 64, the ion membrane 62 includes anion membrane and cation membrane, the anion membrane and the cation membrane are alternately arranged on the partition 64, and an electrode 61 is disposed on the partition 64, the electrode 61 is connected to the energy storage mechanism 8.

[0045] The membrane stack 6 consists of ion exchange membranes 62, electrodes 61, and separators 64. To increase the membrane area and improve salinity gradient power generation efficiency, the membrane stack 6 is made in a folded fan shape and is fixed on the separators 64. The anion and cation exchange membranes 62 are arranged alternately with the separators 64 to form a membrane stack. The two ends of the ion exchange membrane stack, where the anion and cation exchange membranes are connected, eventually converge and are bonded to the separators 64, but not connected to each other, forming two electrode chambers together with the adjacent separators and membrane stacks. A pair of electrodes 61 are placed on one set of membranes on the left and right sides of the separator, and connected to the energy storage mechanism 8 via wires to store the energy generated by salinity gradient power generation.

[0046] Furthermore, the cation exchange membrane is a molecular sieve / PVDF composite membrane. Specifically, the molecular sieve / PVDF composite membrane is prepared by a phase inversion method to obtain a PVDF / molecular sieve base membrane, which is then grafted with styrene and sulfonated to obtain the molecular sieve / PVDF composite membrane.

[0047] To improve the efficiency of reverse electrodialysis salt gradient power generation, a novel molecular sieve / PVDF composite cation exchange membrane was developed. This high-efficiency cation exchange membrane is a molecular sieve / PVDF composite membrane. First, a PVDF / molecular sieve base membrane was prepared using a phase inversion method. Then, styrene was grafted onto the base membrane and sulfonated to obtain the molecular sieve / PVDF cation exchange membrane. Test results showed that the performance of the molecular sieve / PVDF cation exchange membrane changed significantly with the amount of molecular sieve added. Optimization experiments determined the optimal amount of molecular sieve to be 1%, at which point the water content of the molecular sieve / PVDF ion exchange membrane was 45.8%, and the membrane resistance was 11.4 Ωcm. -2The ionic conductivity is 2.17 × 10⁻⁶. -3 Scm -2 The ion exchange capacity is 2.5 mMg. -1 Specific data are shown in Table 1.

[0048] Table 1 Effect of molecular sieve addition amount on the performance of molecular sieve / PVDF composite membrane

[0049]

[0050] A PVDF / molecular sieve composite cation exchange membrane and a commercial cation exchange membrane CMI-7001S were combined with a commercial anion exchange membrane AMI-7001S to fabricate a reverse electrodialysis salt gradient cell unit, and its salt gradient power generation was tested. Figure 5 As shown, the peak power output of salinity gradient power generation is 0.87 Wm from commercial cation exchange membranes. -2 This was increased to 1.05 Wm using a PVDF / molecular sieve composite membrane. -2 The power generation performance has improved by 20%.

[0051] Furthermore, the cold end holding unit 5 includes a heat dissipation base 51, which is disposed between the thermoelectric generator 4 and the membrane stack plate 6. The heat dissipation base 51, the heat conduction pipe 52 and the heat dissipation fins 53 are connected in sequence.

[0052] Furthermore, the thermoelectric generator comprises four semiconductor generators.

[0053] Furthermore, the heat exchange medium in the heat pipe 52 is an ethylene glycol solution, a propylene glycol solution, or a combination of an ethylene glycol solution and a propylene glycol solution.

[0054] Specifically, the thermoelectric generator assembly includes four thermoelectric generator chips 4 connected in series and a cold-end holding unit 5. The cold-end holding unit 5 consists of a heat dissipation base 51, a heat pipe 52 with a heat insulation sleeve, an insulating sleeve 52, and heat dissipation fins 53. The hot end of the thermoelectric generator chip 4 is in close contact with the black porous heat absorption plate 3, and the cold end is in close contact with the heat dissipation base 51 and connected to the cold-end heat dissipation fins 53 via the heat pipe 52. The heat exchange medium in the heat pipe 52 is an ethylene glycol solution, a propylene glycol solution, or a combination thereof. The four thermoelectric generator chips operate in series and are connected to an energy storage device via wires to store the energy generated by the thermoelectric generator. The heat dissipation fins 53 are distributed in a rounded rectangular shape around the entire device in the seawater, serving both as counterweight and stable support, improving resistance to wave capsizing.

[0055] Example

[0056] Structure of a salt gradient power generation module

[0057] like Figure 3 As shown, the design consists of, from top to bottom, a transparent dome-shaped top cover (transparent cover 1, made of polycarbonate), a seawater storage tank 2 (seawater storage tank 2, made of polyethylene), a water-absorbing and heat-absorbing material (porous heat-absorbing plate 3, made of carbon black / sodium polyacrylate composite material), a fan-shaped membrane stack 6 (composed of alternating bonding of PVDF / molecular sieve cation exchange membrane and AMI-7001S commercial anion exchange membrane, with polytetrafluoroethylene partition), and a freshwater storage tank 7 (freshwater storage tank 7, made of polyethylene).

[0058] External seawater enters through the inlet one-way check valve 22, filling the upper part of the stack template 6. The heat-absorbing and water-absorbing material 3 on the upper part of the stack template is embedded in the bottom of the seawater storage tank 2 to absorb the heat energy of sunlight. On the one hand, the temperature rise causes the seawater 25 to evaporate, and through distillation, fresh water is condensed on the transparent top cover and flows along the fresh water collection tank 21 to the condensate collection channel 23. The fresh water is then collected into the fresh water storage tank 7 through the central collection channels 24, 63, and 73. On the other hand, the seawater in the seawater storage tank 2 is concentrated after evaporation, and the salinity increases, which is beneficial for reverse electrodialysis salinity gradient power generation. The anion and cation membranes of the reverse electrodialysis salinity gradient power generation membrane stack 6 are arranged alternately, and the seawater storage tank 2 and the fresh water storage tank 7 are separated above and below the stack membranes. With the one-way check valve 22 for seawater inflow and the fresh water electric discharge pump 71, it can play the role of water distribution and collection.

[0059] The membrane stack consists of 12 pairs of anion and cation exchange membranes, which, together with the separator 64, form upper and lower anode and cathode chambers. Using appropriate electrodes 61, sustained reverse electrodialysis salt gradient power generation can be achieved. The cathode is a titanium mesh, and the anode is a titanium mesh coated with ruthenium. The positive and negative electrodes have the same external dimensions as a single anion or cation exchange membrane, forming a 1 / 24 circle sector structure. The anion and cation exchange membranes are stacked in a spatial sector shape to increase the contact area between the membrane stack and the water.

[0060] Simulated seawater was used, the main component of which was 30 g / L concentrated brine. -1 NaCl solution. Current and voltage values ​​were measured and recorded using a Keithley 2450 under direct sunlight. With a modified cation exchange membrane containing 1% molecular sieve, the power generation over a prolonged salinity gradient exceeding 5 hours was higher than 0.75 W·m⁻¹. -2 Figure 5 .

[0061] Structure of thermoelectric generator

[0062] like Figure 4 As shown, a thermoelectric generator 4 operating on the Seebeck effect is the core. It achieves thermoelectric power generation by utilizing the temperature difference between the cold and hot ends to induce directional electron flow within the semiconductor, thereby generating a potential difference. This invention focuses on maintaining the low temperature at the cold end and the high temperature at the hot end, such as... Figure 4 The exploded view shows that the cold end of the thermoelectric generator 4 is closely attached to the heat sink base 51 and connected to the heat sink fins 53 by four heat-conducting pipes 52 with insulating sleeves. The heat sink fins 53 are placed in seawater, and their high heat dissipation area keeps the cold end at a low temperature. The hot end is attached to a porous heat absorber plate 3 embedded in the upper part of the thermal imager, which absorbs solar heat to maintain the hot end at a high temperature. Thus, the thermoelectric generator maintains a stable temperature difference between its hot and cold ends, thereby achieving stable thermoelectric power generation efficiency.

[0063] For thermoelectric power generation, the open-circuit voltage and power output are significantly affected by the temperature difference between the cold and hot ends of the thermoelectric semiconductor chip. Figure 6 Under a temperature difference of 40°C, the open-circuit voltage can reach 1.15 V, and the power generation capacity can reach 20 Wm. -2 As the temperature difference continues to increase, the rate of increase in open-circuit voltage and power generation decreases.

[0064] Power generation from the coupled reverse electrodialysis salt gradient power generation and thermoelectric power generation system

[0065] The system operates by coupling salinity gradient power generation with thermoelectric power generation. Under sunlight, 30 g / L of concentrated brine... -1 The NaCl solution continuously evaporates to form fresh water. Concentrated brine is continuously added until the fresh water tank is full, at which point measurements begin. The area of ​​a single pair of ion exchange membranes is 0.5 m². 2 The salinity differential cell with 12 pairs of ion exchange membranes connected in series can reach a power of 4.5W, and generate 22.5Wh of electricity after 5 hours of continuous operation.

[0066] Under direct sunlight, the black porous heat-absorbing plate 3 rapidly absorbs heat and raises the temperature of the seawater in the seawater storage tank 2 to over 60 degrees Celsius. Meanwhile, the cold end of the thermoelectric generator 4, due to the heat dissipation copper pipe 52 and heat dissipation fins 53, maintains a temperature close to 20 degrees Celsius, similar to the surface seawater temperature. Thus, the temperature difference between the cold and hot ends of the thermoelectric generator 4 can reach 40 degrees Celsius. Four 0.1m²... 2 The thermoelectric generators are connected in series, and the thermoelectric power generation can reach 8 W. When the power generation is synchronized with the salinity difference for 5 hours, it generates 40 Wh of electricity.

[0067] Combining the salinity gradient power generation described above, this system can generate 62.5 Wh of electricity in 5 hours of continuous power generation. See Table 2 for specific results.

[0068] Table 2. Comprehensive power generation performance data of the salinity / temperature difference coupled system

[0069]

[0070] Although this application has been described above with reference to specific embodiments, those skilled in the art will understand that many modifications can be made to the configurations and details disclosed in this application within the principles and scope of the disclosure. The scope of protection of this application is determined by the appended claims, and the claims are intended to cover all modifications included in the literal meaning or scope of equivalents of the technical features in the claims.

Claims

1. A sustainable power generation device, characterized in that: The system includes interconnected power generation and energy storage mechanisms. The power generation mechanism comprises interconnected salinity gradient power generation and thermoelectric power generation components. The salinity gradient power generation component includes a transparent cover, a seawater storage tank, a membrane stack plate, and a freshwater storage tank connected in sequence. The freshwater storage tank is connected to a one-way electric drainage pump. The thermoelectric power generation component includes a thermoelectric generator plate with a hot end and a cold end. The hot end is connected to a porous heat absorber plate, which is disposed within the seawater storage tank. The cold end is connected to a cold end holding unit. The membrane stack plate is connected to the energy storage mechanism, and the thermoelectric generator plate is also connected to the energy storage mechanism. A one-way check valve is provided on the seawater storage tank. The seawater storage tank includes a condensate collection unit, which is connected to the freshwater storage tank. The condensate collection unit includes a condensate collection trough, which is disposed on the outer edge of the seawater storage tank and connected to a manifold. The manifold is disposed within the seawater storage tank and connected to a conduit, which passes through the membrane stack plate and connects to the freshwater storage tank. The cold end holding unit includes a heat dissipation base, which is disposed between the thermoelectric generator and the membrane stack plate. The heat dissipation base, heat conduction pipe and heat dissipation fins are connected in sequence. When the fresh water condensate accumulates to a preset height and the pressure at the drain outlet of the fresh water storage tank reaches a preset value, the one-way electric drain pump will discharge all the excess fresh water.

2. The sustainable power generation device as described in claim 1, characterized in that: The membrane stack is folded fan-shaped and includes a partition. An ion membrane is disposed on the partition. The ion membrane includes anion membrane and cation membrane. The anion membrane and the cation membrane are alternately arranged on the partition. An electrode is disposed on the partition and is connected to the energy storage mechanism.

3. The sustainable power generation device as described in claim 2, characterized in that: The cation exchange membrane is a molecular sieve / PVDF composite membrane.

4. The sustainable power generation device as described in claim 3, characterized in that: The molecular sieve / PVDF composite membrane is prepared by phase inversion method to obtain PVDF / molecular sieve base membrane, and then obtained by grafting styrene and sulfonation.

5. The sustainable power generation device as described in any one of claims 1-4, characterized in that: The thermoelectric generator comprises four semiconductor generators.

6. The sustainable power generation device as described in claim 5, characterized in that: The heat exchange medium in the heat pipe is an ethylene glycol solution, a propylene glycol solution, or a combination of an ethylene glycol solution and a propylene glycol solution.

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