Offshore floating type photovoltaic and wave power generation integrated device and power generation method

Abstract

An offshore floating type photovoltaic and wave power generation integrated device comprises a plurality of floating bodies distributed in an array mode, photovoltaic panels used for photovoltaic power generation are fixedly arranged at the tops of the floating bodies, a plurality of push rods are arranged on the floating bodies in a sliding and penetrating mode, and the push rods located on the different floating bodies can be connected through movable connecting pieces. A turbine fan, a generator and a plurality of air chambers are arranged in the floating body, the turbine fan is fixedly arranged on an input shaft of the generator in a sleeving mode, each air chamber is provided with two air inlets and an air outlet, the push rod correspondingly stretches into the air chamber and then is connected with a piston, and in the moving process of the piston, air in the air chamber can be extruded out of the air outlet to form power generation airflow; the power generation airflow acts on the turbine fan to drive the turbine fan to rotate. According to the offshore floating type photovoltaic and wave power generation integrated device and the power generation method, the power generator and the turbine fan are located in the floating body, do not need to make contact with seawater for a long time and are not prone to being corroded, the overall service life is longer, and power generation is more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic power generation, and in particular to an offshore floating photovoltaic and wave power generation integrated device and a power generation method. Background Art

[0002] Offshore floating photovoltaics is an emerging power generation technology that can utilize the vast sea surface to deploy a large number of photovoltaic modules to achieve efficient photovoltaic power generation. In addition, a large amount of kinetic energy will be generated when the floating body moves with the waves, and this kinetic energy can also be converted into electrical energy, namely wave power generation. The organic combination of the two can effectively improve the efficiency of power generation. In the prior art, when the offshore floating photovoltaic power generation system is performing wave power generation at the same time, it mainly uses the ocean current to directly drive the impeller to rotate to drive the generator. The impeller is eroded by seawater for a long time and has a limited lifespan. In addition, most of the adjacent floating bodies are connected by simple hinges, and the range of relative movement is limited, which is prone to stress concentration, further reducing the overall life of the system. Summary of the invention

[0003] In order to address the deficiencies in the prior art, the present invention provides an offshore floating photovoltaic and wave power generation integrated device and power generation method. The generator and turbine fan are located inside the floating body and do not need to be in contact with seawater for a long time. They are not easily corroded, have a longer overall lifespan, and generate more stable power.

[0004] In order to achieve the above object, the specific scheme adopted by the present invention is:

[0005] An integrated offshore floating photovoltaic and wave power generation device comprises a plurality of floating bodies distributed in an array, a photovoltaic panel for photovoltaic power generation being fixedly arranged on the top of the floating body, a plurality of push rods being slidably penetrated through the floating body, and the push rods being connectable to adjacent floating bodies through movable connecting parts, a turbine fan, a generator and a plurality of air chambers being arranged inside the floating body, the turbine fan being fixedly sleeved on the input shaft of the generator, the air chamber being provided with two air inlets and one air outlet, the push rods being connected to pistons after being extended into the air chambers respectively, and the gas in the air chambers can be squeezed out from the air outlets to form a power generation airflow during the movement of the pistons, and the power generation airflow acts on the turbine fan to drive the turbine fan to rotate.

[0006] Preferably, the movable connecting part includes two hemispherical shells, which are fixedly connected by multiple bolts to form a connecting spherical shell. The connecting spherical shell is fixedly set on the floating body. The connecting spherical shell is provided with an opening, and the diameter of the opening is larger than the diameter of the pushing rod. A connecting ball is rotatably set in the connecting spherical shell, and the pushing rod can pass through the opening and be fixedly connected to the connecting ball.

[0007] Preferably, a partition is provided inside the air chamber, and the partition separates the inner cavity of the air chamber into two interconnected first air guide cavity and second air guide cavity. The piston is slidably arranged in the first air guide cavity, and the two air inlets are both connected to the first air guide cavity, and the two air inlets are respectively located on both sides of the piston, and the air outlet is connected to both the first air guide cavity and the second air guide cavity.

[0008] Preferably, the air chamber is fixedly connected to an air outlet shell, the first air guide cavity and the second air guide cavity are both connected to the air outlet shell, and the air outlet is opened on the air outlet shell.

[0009] Preferably, the air inlet, the connecting position between the first air guide cavity and the air outlet shell, and the connecting position between the second air guide cavity and the air outlet shell are all provided with gas switching valves, and the switching state of the gas switching valve can be changed during the movement of the piston.

[0010] Preferably, the gas switch valve includes a cylindrical air cover and an exchange ball movably arranged in the air cover, and both ends of the air cover are contracted to form a limiting portion for limiting the exchange ball. When the exchange ball moves to one end of the air cover, the gas switch valve is in an open state, and when the exchange ball moves to the other end of the air cover, the gas switch valve is in a closed state.

[0011] Preferably, a plurality of positioning grooves are fixedly provided on the inner wall of the floating body, and the air chambers are fixedly provided in the positioning grooves accordingly.

[0012] Preferably, a counterweight adjustment cabin is fixedly provided inside the floating body, and at least one counterweight block is provided in the counterweight adjustment cabin.

[0013] Preferably, the floating body is configured as a rectangular box, and the floating body comprises a top, a bottom and four side parts, and a pushing rod is movably provided on each of the side parts.

[0014] A power generation method, based on the above-mentioned integrated offshore floating photovoltaic and wave power generation device, comprises the following steps:

[0015] Deploying the device and adjusting the draft of the floating body so that the push rod is above sea level;

[0016] Using the photovoltaic panel to generate photovoltaic power to obtain first electrical energy;

[0017] When the floating body moves with the waves, the push rod pushes the piston to drive the gas in the air chamber to be blown out from the air outlet to form the power generation airflow, and the power generation airflow drives the turbine fan to rotate so that the generator generates electricity to obtain the second electric energy;

[0018] The first electric energy and the second electric energy are collected to complete power generation.

[0019] In the process of the floating body rising and falling under the influence of waves, the present invention utilizes a push rod to drive the piston to move, and then the piston squeezes out the gas in the air chamber to form a power generation airflow, and utilizes the power generation airflow to transfer the kinetic energy of the floating body during the movement to the turbine fan to drive the generator to generate electricity. The generator and the turbine fan are located inside the floating body and do not need to be in contact with seawater for a long time. They are not easily corroded, have a longer overall lifespan, and generate electricity more stably. The present invention adopts a combination of photovoltaic power generation and wave power generation, and has higher power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the distribution of the floating body in the present invention;

[0022] Figure 2 It is a schematic diagram of the connection method of the floating body;

[0023] Figure 3 It is a schematic diagram of the internal structure of the floating body;

[0024] Figure 4 It is a schematic diagram of the distribution of air chambers;

[0025] Figure 5 It is a structural diagram of a gas switch valve.

[0026] Figure markings: 1-floating body, 101-inner wall, 2-photovoltaic panel, 3-transmission assembly, 301-push rod, 302-connecting ball, 303-piston, 4-movable connecting piece, 401-hemispherical shell, 402-bolt, 5-air chamber, 5011-first mesh cover, 5012-second mesh cover, 5013-third mesh cover, 5014-fourth mesh cover, 502-air outlet shell, 503-air outlet, 504-air exchange ball, 6-turbofan, 7-generator, 8-positioning groove, 9-counterweight adjustment cabin. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 5 As shown, an offshore floating photovoltaic and wave power generation integrated device includes a plurality of floating bodies 1 distributed in an array, a photovoltaic panel 2 for photovoltaic power generation is fixedly arranged on the top of the floating body 1, a plurality of push rods 301 are slidably penetrated on the floating body 1, and the push rods 301 can be connected to adjacent floating bodies 1 through a movable connecting piece 4, a turbine fan 6, a generator 7 and a plurality of air chambers 5 are arranged inside the floating body 1, the turbine fan 6 is fixedly sleeved on the input shaft of the generator 7, the air chamber 5 is provided with two air inlets and an air outlet 503, the push rod 301 is correspondingly extended into the air chamber 5 and connected to a piston 303, and the piston 303 can squeeze the gas in the air chamber 5 from the air outlet 503 to form a power generation airflow during the movement, and the power generation airflow acts on the turbine fan 6 to drive the turbine fan 6 to rotate.

[0029] When the present invention is used, after selecting the target sea area, all the floating bodies 1 are placed in the target sea area, and the floating bodies 1 float on the sea surface, and the photovoltaic panels 2 can be exposed to sunlight to generate photovoltaic power to obtain the first electric energy; on the other hand, the floating body 1 will be affected by the waves and shake up and down, and the push rod 301 can move relative to the floating body 1 during the process. The movement of the floating body 1 is different, and the moving direction of the push rod 301 is also different, which may be to the inside of the floating body 1 or to the outside of the floating body 1. During the movement of the push rod 301, the piston 303 can be driven to move synchronously, and then the piston 303 squeezes the gas in the air chamber 5 from the air outlet 503 to form a power generation airflow, and the power generation airflow acts on the turbofan 6 to drive the turbofan 6 to rotate, and finally the turbofan 6 drives the generator 7 to operate to generate electricity to obtain the second electric energy. The power generation process can be completed by collecting the first electric energy and the second electric energy. In the whole power generation process, the photovoltaic panel 2 realizes photovoltaic power generation, and the generator 7 uses the energy generated by the movement of the floating body 1 driven by waves to generate electricity, so the generator 7 realizes wave power generation. The present invention realizes photovoltaic power generation and wave power generation at the same time, which can effectively improve the power generation efficiency.

[0030] It should also be noted that during the movement, the piston 303 needs to squeeze the gas in the air chamber 5 out from the air outlet 503, and during the process, it needs to suck in gas from the air inlet to ensure the pressure balance inside and outside the air chamber 5. In order to avoid the suction of seawater causing the total amount of gas in the air chamber 5 to decrease, resulting in a decrease in power generation efficiency, when the buoy 1 is placed in the target sea area, the draft depth of the buoy 1 needs to be adjusted to ensure that the air inlet and air outlet 503 are above the sea level. It is best to ensure that seawater does not enter the air chamber 5 from the air inlet and air outlet 503 during any movement of the buoy 1.

[0031] Because the floating body 1 has different movement modes of two adjacent floating bodies 1 during its movement, in order to ensure that any movement of the two adjacent floating bodies 1 can drive the push rod 301 to move, the movable connecting member 4 includes two hemispherical shells 401, and the two hemispherical shells 401 are fixedly connected by a plurality of bolts 402 to form a connecting spherical shell, which is fixedly arranged on the floating body 1, and the connecting spherical shell is provided with an opening, and the diameter of the opening is larger than the diameter of the push rod 301, and a connecting ball 302 is rotatably arranged in the connecting spherical shell, and the push rod 301 can pass through the opening and be fixedly connected with the connecting ball 302. By setting the movable connecting member 4, the push rod 301 can rotate within a certain range around the center of the connecting ball 302, so that the two adjacent floating bodies 1 can be relatively displaced in multiple different directions, with higher flexibility, thereby improving the power generation efficiency of the generator 7. It should also be noted that the range of rotation of the push rod 301 will be limited by the opening.

[0032] In other embodiments of the present invention, the movable connecting member 4 can also be configured as other structures with universal connection functions, such as a cross-axis rigid universal joint, and an anti-corrosion structure is required to prevent rapid corrosion from causing disconnection between two adjacent floating bodies 1.

[0033] The specific structure of the air chamber 5 is as follows: a partition is provided inside the air chamber 5, and the partition separates the inner cavity of the air chamber 5 into two interconnected first air guiding cavities and second air guiding cavities, the piston 303 is slidably disposed in the first air guiding cavity, the two air inlets are both connected to the first air guiding cavity, and the two air inlets are respectively located on both sides of the piston 303, and the air outlet 503 is connected to both the first air guiding cavity and the second air guiding cavity. During the movement, the piston 303 can inhale gas from one of the air inlets, and because the first air guiding cavity and the second air guiding cavity are connected, the gas inhaled into the first air guiding cavity can also enter the second air guiding cavity, and the gas in the air chamber 5 can be squeezed out from the air outlet 503.

[0034] Furthermore, the air chamber 5 is fixedly connected to the air outlet housing 502, the first air guide cavity and the second air guide cavity are both connected to the air outlet housing 502, and the air outlet 503 is provided on the air outlet housing 502. Through the arrangement of the air outlet housing 502, when the piston 303 moves, the gas in the air chamber 5 can be squeezed out from the air outlet 503, whether it flows out from the first air guide cavity or the second air guide cavity, so as to ensure that it can act on the turbofan 6 to drive the turbofan 6 to rotate.

[0035] In order to prevent gas from flowing out of the air inlet during the movement of the piston 303, the air inlet, the connection position between the first air guide cavity and the air outlet housing 502, and the connection position between the second air guide cavity and the air outlet housing 502 are all provided with a gas switch valve, and the switch state of the gas switch valve can be changed during the movement of the piston 303. The gas switch valve includes a cylindrical air permeable cover and a ventilating ball 504 movably arranged in the air permeable cover, and the two ends of the air permeable cover are contracted to form a limiting part for limiting the ventilating ball 504. When the ventilating ball 504 moves to one end of the air permeable cover, the gas switch valve is in an open state, and when the ventilating ball 504 moves to the other end of the air permeable cover, the gas switch valve is in a closed state.

[0036] More specifically, Figure 5 As shown, the partition is arranged horizontally, dividing the inner cavity of the air chamber 5 into a first air guide cavity and a second air guide cavity which are arranged vertically; there are four gas switch valves, which are respectively located at the connection position between the first air guide cavity and the air outlet housing 502, the connection position between the second air guide cavity and the air outlet housing 502 and the two air inlets; the air permeable covers in the four gas switch valves are respectively defined as the first mesh cover 5011, the second mesh cover 5012, the third mesh cover 5013 and the fourth mesh cover 5014, wherein the first mesh cover 5011 and the second mesh cover 5012 are respectively located at the two air inlets, the third mesh cover 5013 is located at the connection position between the first air guide cavity and the air outlet housing 502, and the fourth mesh cover 5014 is located at the connection position between the second air guide cavity and the air outlet housing 502. Figure 5 For example, when the piston 303 moves to the right, the air exchange ball 504 in the first mesh cover 5011 is located on the right side to open the air inlet on the left, and the external gas enters the air chamber 5 from the air inlet on the left, and the air exchange ball 504 in the second mesh cover 5012 is also located on the right side, thereby closing the air inlet on the right to prevent gas from leaking out of the air inlet on the right. The air exchange ball 504 in the third mesh cover 5013 is also located on the right side, so that the gas in the first air guide cavity can enter the air outlet shell 502. The air exchange ball 504 in the fourth mesh cover 5014 is located on the left side, thereby closing the connecting position between the second air guide cavity and the air outlet shell 502, preventing the gas in the air outlet shell 502 from flowing back into the second air guide cavity, thereby ensuring that the gas can flow out smoothly from the air outlet 503.

[0037] On the contrary, when the piston 303 moves to the left, the exchange balls 504 in the first mesh cover 5011, the second mesh cover 5012 and the third mesh cover 5013 are all located on the left, and the exchange ball 504 in the fourth mesh cover 5014 is located on the right, thereby closing the air inlet on the left and the connecting position between the first air guide cavity and the air outlet shell 502, and the external air enters the first air guide cavity from the air inlet on the right, and the original gas in the first air guide cavity and the second air guide cavity enters the air outlet shell 502 from the connecting position between the second air guide cavity and the air outlet shell 502, and then flows out from the air outlet 503.

[0038] By setting the four gas switch valves, no matter how the piston 303 moves, the gas in the air chamber 5 can be squeezed out from the air outlet 502 to form a power generation airflow, and no active control is required, which is easier to implement and has a lower cost.

[0039] In order to fix the position of the air chamber 5 and improve the stability of the power generation airflow, a plurality of positioning grooves 8 are fixedly arranged on the inner wall 101 of the floating body 1, and the air chamber 5 is correspondingly fixedly arranged in the positioning grooves 8. The positioning grooves 8 can limit the position of the air chamber 5 to ensure the stability of the position of the air chamber 5.

[0040] In order to adjust the draft of the floating body 1, ensure that the air inlet and the air outlet 502 are both above the sea surface, and prevent seawater from entering the air chamber 5, a counterweight adjustment cabin 9 is fixedly provided inside the floating body 1, and at least one counterweight block is provided in the counterweight adjustment cabin 9. By controlling the number of counterweight blocks, the weight of the entire floating body 1 can be controlled, thereby changing the draft of the floating body 1.

[0041] In one embodiment of the present invention, all the floating bodies 1 are arranged in a matrix, and the floating bodies 1 are set as rectangular boxes, with length, width and height set to 1m, 1m and 0.5m respectively, and wall thickness set to 0.02m. The floating bodies 1 include a top, a bottom and four sides, and each side is movably provided with a push rod 301. At this time, all the floating bodies 1 can be arranged arbitrarily. In other embodiments of the present invention, the push rods 301 can also be provided only on two adjacent sides, and the connecting spherical shells are fixedly provided on the other two sides. At this time, the floating bodies 1 need to be arranged according to certain rules to avoid the situation where the sides of the connecting spherical shells of two adjacent floating bodies 1 are opposite to each other, otherwise it will lead to the failure to smoothly achieve the connection of the two floating bodies 1.

[0042] The present invention also provides a power generation method based on the above-mentioned integrated offshore floating photovoltaic and wave power generation device, and the method includes S1 to S4.

[0043] S1. Deploy the device and adjust the draft of the floating body 1 so that the push rod 301 is above the sea level.

[0044] S2. Using the photovoltaic panel 2 to generate photovoltaic power to obtain first electrical energy.

[0045] S3, when the floating body 1 moves with the waves, the push rod 301 pushes the piston 303 to drive the gas in the air chamber 5 to blow out from the air outlet 503 to form a power generation airflow, and the power generation airflow drives the turbine fan 6 to rotate so that the generator 7 generates electricity to obtain the second electric energy. The specific power generation process has been described in detail above and will not be repeated here.

[0046] S4, collecting the first electric energy and the second electric energy to complete power generation. Because the lighting environment of the photovoltaic panel 2 and the operating state of the floating body 1 are unstable, the first electric energy and the second electric energy are unstable and need to be rectified before they can be connected to the grid or stored. The specific operation methods are all existing technologies in this field and will not be repeated here.

[0047] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0048] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated offshore floating photovoltaic and wave power generation device, comprising a plurality of floating bodies (1) distributed in an array, a photovoltaic panel (2) for photovoltaic power generation being fixedly arranged on the top of the floating body (1), characterized in that: A plurality of push rods (301) are slidably provided on the floating body (1), and the push rods (301) can be connected to the adjacent floating body (1) through a movable connecting piece (4). A turbine fan (6), a generator (7) and a plurality of air chambers (5) are arranged inside the floating body (1). The turbine fan (6) is fixedly sleeved on the input shaft of the generator (7). The air chamber (5) is provided with two air inlets and one air outlet (503). The push rods (301) are correspondingly extended into the air chamber (5) and then connected to a piston (303). During the movement of the piston (303), the gas in the air chamber (5) can be squeezed out from the air outlet (503) to form a power generation airflow. The power generation airflow acts on the turbine fan (6) to drive the turbine fan (6) to rotate.

2. An offshore floating photovoltaic and wave power generation integrated device as claimed in claim 1, characterized in that: The movable connecting member (4) comprises two hemispherical shells (401), the two hemispherical shells (401) are fixedly connected by a plurality of bolts (402) to form a connecting spherical shell, the connecting spherical shell is fixedly arranged on the floating body (1), the connecting spherical shell is provided with an opening, the diameter of the opening is larger than the diameter of the pushing rod (301), a connecting ball (302) is rotatably arranged in the connecting spherical shell, and the pushing rod (301) can pass through the opening and be fixedly connected to the connecting ball (302).

3. The integrated offshore floating photovoltaic and wave power generation device according to claim 1, characterized in that: A partition is provided inside the air chamber (5), and the partition separates the inner cavity of the air chamber (5) into two mutually connected first air guide cavities and second air guide cavities. The piston (303) is slidably arranged in the first air guide cavity, and the two air inlets are both connected to the first air guide cavity, and the two air inlets are respectively located on both sides of the piston (303), and the air outlet (503) is connected to both the first air guide cavity and the second air guide cavity.

4. An offshore floating photovoltaic and wave power generation integrated device as claimed in claim 3, characterized in that: The air chamber (5) is fixedly connected to an air outlet shell (502), the first air guide cavity and the second air guide cavity are both in communication with the air outlet shell (502), and the air outlet (503) is provided on the air outlet shell (502).

5. An integrated offshore floating photovoltaic and wave power generation device as claimed in claim 4, characterized in that: The air inlet, the connection position between the first air guide cavity and the air outlet shell (502), and the connection position between the second air guide cavity and the air outlet shell (502) are all provided with gas switch valves, and the switch state of the gas switch valve can be changed during the movement of the piston (303).

6. An offshore floating photovoltaic and wave power generation integrated device as claimed in claim 5, characterized in that: The gas switch valve includes a cylindrical air cover and an exchange ball (504) movably arranged in the air cover, and the two ends of the air cover are contracted to form a limiting portion for limiting the exchange ball (504). When the exchange ball (504) moves to one end of the air cover, the gas switch valve is in an open state, and when the exchange ball (504) moves to the other end of the air cover, the gas switch valve is in a closed state.

7. The integrated offshore floating photovoltaic and wave power generation device according to claim 1, characterized in that: A plurality of positioning grooves (8) are fixedly arranged on the inner wall (101) of the floating body (1), and the air chambers (5) are correspondingly fixedly arranged in the positioning grooves (8).

8. The integrated offshore floating photovoltaic and wave power generation device according to claim 1, characterized in that: A counterweight adjustment cabin (9) is fixedly arranged inside the floating body (1), and at least one counterweight block is arranged in the counterweight adjustment cabin (9).

9. The integrated offshore floating photovoltaic and wave power generation device according to claim 1, characterized in that: The floating body (1) is configured as a rectangular box, and the floating body (1) comprises a top, a bottom and four side parts, and each of the side parts is provided with a push rod (301) movably inserted therein.

10. A method for generating electricity, based on an integrated offshore floating photovoltaic and wave power generation device as claimed in any one of claims 1 to 9, characterized in that: The method comprises the following steps: Deploying the device and adjusting the draft of the floating body (1) so that the push rod (301) is above the sea level; Using the photovoltaic panel (2) to generate photovoltaic power to obtain first electrical energy; When the floating body (1) moves with the waves, the push rod (301) pushes the piston (303) to drive the gas in the air chamber (5) to be blown out from the air outlet (503) to form the power generation airflow, and the power generation airflow drives the turbine fan (6) to rotate so that the generator (7) generates electricity to obtain second electric energy; The first electric energy and the second electric energy are collected to complete power generation.

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