Photovoltaic-thermoelectric-piezoelectric coupling power generation device

Abstract

This invention relates to the field of composite energy power generation technology, specifically to a photovoltaic-thermal-piezoelectric coupling power generation device, comprising a transparent thermally conductive glass plate, a flexible photovoltaic panel, a semiconductor thermoelectric generator, a piezoelectric ceramic film, and heat dissipation fins. The upper surface of the flexible photovoltaic panel is covered with the transparent thermally conductive glass plate. The semiconductor thermoelectric generator has a non-connected end and a connected end of a PN-type semiconductor. The non-connected end is fixedly connected to the upper surface of the transparent thermally conductive glass plate, and the connected end is fixedly connected to the bottom of the piezoelectric ceramic film. The piezoelectric ceramic film is disposed on the lower surface of the flexible photovoltaic panel, and the heat dissipation fins are disposed below the connected end of the semiconductor thermoelectric generator. This invention uses a semiconductor thermoelectric generator to generate electricity based on the temperature difference between the top and bottom of the photovoltaic panel, while integrating a piezoelectric ceramic film to generate electricity using the mechanical energy of raindrops. This provides heat dissipation for the photovoltaic panel and improves energy utilization efficiency. It has a simple structure and can operate in all weather conditions.

Description

Technical Field

[0001] This invention belongs to the field of composite energy power generation technology, specifically relating to a photovoltaic-thermal difference-piezoelectric energy coupling power generation device based on a flexible photovoltaic panel. Background Technology

[0002] The efficient use of solar energy is an important way to alleviate the energy crisis. Existing photovoltaic panels only utilize about 30% of solar energy, and can only absorb short-wavelength light, with the remaining large amount of energy being lost as heat. Under sunlight, the surface temperature of photovoltaic panels can reach 60-70℃, which not only leads to a decrease in photoelectric conversion efficiency, but also accelerates material aging.

[0003] To utilize the waste heat of photovoltaic panels, existing technologies attach thermoelectric generators to the back surface of the photovoltaic panel, generating electricity through the temperature difference between the back surface and the heat dissipation device. However, this method has limitations: the thermoelectric generator only utilizes the heat source on one side of the back surface, without utilizing the higher surface temperature of the photovoltaic panel, resulting in low efficiency in utilizing the temperature difference.

[0004] In addition, raindrop impacts in outdoor environments contain mechanical energy, but existing photovoltaic-thermal difference devices do not involve this power generation, and the energy source still relies on sunlight, resulting in a significant decrease in power generation capacity on cloudy or rainy days.

[0005] Therefore, providing a coupled power generation device with a simple structure, high energy utilization rate, and the ability to simultaneously utilize light energy, thermoelectric energy, and raindrop mechanical energy is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In response to the above situation, this solution provides a photovoltaic-thermal-piezoelectric coupling power generation device, which uses the temperature difference between the upper part and the lower part of the flexible photovoltaic panel (2) to perform thermoelectric conversion. The flexible photovoltaic panel (2) converts solar energy into electrical energy according to the photoelectric effect, and at the same time utilizes the mechanical energy of raindrops on rainy days to achieve efficient energy utilization.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A photovoltaic-thermal-piezoelectric coupling power generation device includes a transparent thermally conductive glass plate (1), a flexible photovoltaic plate (2), a piezoelectric ceramic film (3), a semiconductor thermoelectric generator (4), and heat dissipation fins (5). The upper surface of the flexible photovoltaic plate (2) is covered with the transparent thermally conductive glass plate (1). The semiconductor thermoelectric generator (4) has a non-connected end and a connected end of a PN type semiconductor. The non-connected end is the hot end and is fixedly connected to the upper surface of the transparent thermally conductive glass plate (1). The connected end is the cold end and is fixedly connected to the bottom of the piezoelectric ceramic film (3). The piezoelectric ceramic film (3) is disposed on the lower surface of the flexible photovoltaic plate (2) and is closely attached to the flexible photovoltaic plate (2) to receive the vibration generated by the raindrop impact device. The heat dissipation fins (5) are fixedly connected to the lower surface of the connected end of the semiconductor thermoelectric generator (4).

[0008] Preferably, the heat dissipation fins (5) are aluminum plate heat sinks with parallel heat dissipation fins on the lower surface, which can effectively dissipate heat and maintain the temperature difference between the non-connected end and the connected end of the semiconductor thermoelectric generator (4).

[0009] Preferably, the transparent thermally conductive glass plate (1) is capable of transferring heat from the upper surface of the photovoltaic plate to the non-connected end of the semiconductor thermoelectric generator (4).

[0010] Preferably, the flexible photovoltaic panel (2) is a cadmium telluride flexible photovoltaic panel.

[0011] Preferably, the thermoelectric semiconductor (4) is a transparent PN-type semiconductor material.

[0012] Preferably, thermally conductive silicone grease is provided between the flexible photovoltaic panel (2) and the piezoelectric ceramic film (3), between the connection end of the semiconductor thermoelectric generator (4) and the piezoelectric ceramic film (3), and between the connection end of the semiconductor thermoelectric generator (4) and the heat dissipation fins (5) to improve thermal conductivity.

[0013] Preferably, the piezoelectric ceramic film (3) is a PVDF piezoelectric film, which is used with the flexible photovoltaic panel (2) to receive vibrations generated by the raindrop impact device.

[0014] Compared with the prior art, the working principle and advantages of the invention are as follows: When the upper surface of the flexible photovoltaic panel (2) receives solar energy, part of the received solar energy is converted into electrical energy according to the photoelectric effect, and part of the energy is heated in the form of heat energy to make the temperature of the upper surface of the flexible photovoltaic panel (2) higher than the temperature of its lower part. The semiconductor thermoelectric generator (4) utilizes this temperature difference to generate electricity through thermoelectric difference. The heat of the flexible photovoltaic panel (2) can be transferred downward layer by layer to the heat dissipation fins. The heat dissipation fins (5) exchange heat with the environment to dissipate heat, which can maintain the temperature of the lower surface of the flexible photovoltaic panel (2) and its lower part and the non-connected end of the semiconductor thermoelectric generator (4), thereby improving the working efficiency of the flexible photovoltaic panel (2) and the semiconductor thermoelectric generator (4). At the same time, when it rains, raindrops hit the transparent heat-conducting glass plate (1), and the vibration is conducted to the piezoelectric ceramic film (3), thereby generating electrical energy according to the piezoelectric effect. In addition, the present invention has a simple structure, high energy utilization rate, and provides a device that can simultaneously utilize light energy, thermoelectric energy, and raindrop mechanical energy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a front view schematic diagram of the present invention;

[0017] The attached diagram lists the components represented by each number as follows: 1. Transparent thermally conductive glass plate; 2. Flexible photovoltaic panel; 3. Piezoelectric ceramic film; 4. Semiconductor thermoelectric generator; 5. Heat sink fins. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] This invention discloses a photovoltaic-thermal-piezoelectric coupling power generation device, such as... Figure 1 As shown, it includes a transparent thermally conductive glass plate (1), a flexible photovoltaic panel (2), a piezoelectric ceramic film (3), a semiconductor thermoelectric generator (4), and heat dissipation fins (5).

[0020] Among them, the transparent thermally conductive glass plate (1) is fixed on the upper surface of the flexible photovoltaic plate (2) to conduct the heat energy on the flexible photovoltaic plate (2) to the non-connected end of the semiconductor thermoelectric generator (4).

[0021] The flexible photovoltaic panel (2) uses a cadmium telluride flexible photovoltaic panel to receive sunlight passing through the transparent thermally conductive glass panel (1) and convert light energy into electrical energy.

[0022] The piezoelectric ceramic film (3) is made of PVDF piezoelectric film and is closely attached to the lower surface of the flexible photovoltaic panel (2) to utilize the mechanical vibration energy generated by raindrops impacting the entire device and convert it into electrical energy.

[0023] The non-connection end of the semiconductor thermoelectric generator (4) is fixedly connected to the upper surface of the transparent thermally conductive glass plate (1), and the connection end is fixedly connected to the bottom of the piezoelectric ceramic film (3) to convert temperature difference into electrical energy.

[0024] Thermal grease is provided between the flexible photovoltaic panel (2) and the piezoelectric ceramic film (3), between the connection end of the semiconductor thermoelectric generator (4) and the piezoelectric ceramic film (3), and between the connection end of the semiconductor thermoelectric generator (4) and the heat dissipation fins (5) to improve thermal conductivity.

[0025] The heat dissipation fins (5) are fixedly connected to the lower surface of the connection end of the semiconductor thermoelectric generator (4) for heat exchange with the environment to dissipate heat, maintain the temperature of the lower surface of the flexible photovoltaic panel (2) and its lower part and the connection end of the semiconductor thermoelectric generator (4), and improve the working efficiency of the flexible photovoltaic panel (2) and the semiconductor thermoelectric generator (4).

[0026] The working principle of the present invention is as follows: s1 Under sunlight conditions, sunlight passes through the transparent heat-conducting glass plate (1) and irradiates the upper surface of the flexible photovoltaic plate (2). The flexible photovoltaic plate (2) converts part of the light energy into electrical energy. The flexible photovoltaic plate (2) absorbs light energy and its surface temperature rises at the same time. The heat is transferred through the transparent heat-conducting glass plate (1) to the non-connection end of the semiconductor thermoelectric generator (4). At the same time, the temperature of the piezoelectric ceramic film (3) is relatively low. As the connection end of the semiconductor thermoelectric generator (4), the temperature difference between the two ends generates the Seebeck effect inside the semiconductor thermoelectric generator (4), converting heat energy into electrical energy.

[0027] Under rainfall conditions, raindrops impact the transparent thermally conductive glass plate (1) and generate mechanical vibration. This vibration is transmitted to the piezoelectric ceramic film (3) through the flexible photovoltaic plate (2). The piezoelectric ceramic film (3), which is closely connected to the flexible photovoltaic plate (2), undergoes bending deformation under the vibration and converts mechanical energy into electrical energy based on the piezoelectric effect.

[0028] Under conditions of sunshine and rainfall, the flexible photovoltaic panel (2) uses light energy for photoelectric conversion, the semiconductor thermoelectric generator (4) uses temperature difference for thermoelectric conversion, and the piezoelectric ceramic film (3) uses piezoelectric effect for piezoelectric conversion. The three power generation methods work together to improve the energy utilization rate.

[0029] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A photovoltaic-thermal-piezoelectric coupling power generation device, characterized in that, It includes a transparent thermally conductive glass plate (1), a flexible photovoltaic panel (2), a piezoelectric ceramic film (3), a semiconductor thermoelectric generator (4), and heat dissipation fins (5); The upper surface of the flexible photovoltaic panel (2) is covered with the transparent thermally conductive glass plate (1); the semiconductor thermoelectric generator (4) has a non-connected end and a connected end of a PN type semiconductor, the non-connected end being the hot end and fixedly connected to the upper surface of the transparent thermally conductive glass plate (1), and the connected end being the cold end and fixedly connected to the bottom of the piezoelectric ceramic film (3); the piezoelectric ceramic film (3) is disposed on the lower surface of the flexible photovoltaic panel (2); the heat dissipation fins (5) are fixedly connected to the lower surface of the connected end of the semiconductor thermoelectric generator (4).

2. The photovoltaic-thermal-piezoelectric coupling power generation device according to claim 1, characterized in that, The piezoelectric ceramic film (3) is a PVDF piezoelectric film, which is closely bonded to the flexible photovoltaic panel (2).

3. The photovoltaic-thermal-piezoelectric coupling power generation device according to claim 1, characterized in that, Thermal grease is provided between the flexible photovoltaic panel (2) and the piezoelectric ceramic film (3), between the connection end of the semiconductor thermoelectric generator (4) and the piezoelectric ceramic film (3), and between the connection end of the semiconductor thermoelectric generator (4) and the heat dissipation fins (5).

4. The photovoltaic-thermal-piezoelectric coupling power generation device according to claim 1, characterized in that, The semiconductor thermoelectric generator (4) is made of transparent PN-type semiconductor material.

5. The photovoltaic-thermal-piezoelectric coupling power generation device according to claim 1, characterized in that, The heat dissipation fins (5) are aluminum plate heat sinks with parallel heat dissipation fins on the lower surface.

6. The photovoltaic-thermal-piezoelectric coupling power generation device according to claim 1, characterized in that, The flexible photovoltaic panel (2) is a cadmium telluride flexible photovoltaic panel.

7. The photovoltaic-thermal-piezoelectric coupling power generation device according to claim 1, characterized in that, The edges of the transparent thermally conductive glass plate (1), the flexible photovoltaic plate (2), and the piezoelectric ceramic film (3) are sealed with epoxy resin sealant.

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