A wave energy and solar energy combined power generation device and its power station

Abstract

This invention discloses a wave energy and solar energy combined power generation device and its power station, belonging to the field of new energy technology for power generation using renewable energy. It includes floating boxes and photovoltaic panels. Adjacent floating boxes are hinged laterally to the same horizontal axis. The photovoltaic panels are arranged on the surface of the floating boxes at an angle facing south or horizontally. A connecting rod perpendicular to the horizontal axis is hinged to the horizontal axis. A hydro-generator and a passive piston pump for driving the hydro-generator are installed inside the floating box. The piston rod of the passive piston pump is hinged to the connecting rod at a position away from the horizontal axis. When adjacent floating boxes swing up and down around the horizontal axis, the passive piston pump completes the water intake and drainage actions, and drives the hydro-generator during drainage. This invention as a whole can realize the combined power generation of wave energy and solar energy. During the swinging of the floating boxes, the orientation of the photovoltaic panels can remain approximately unchanged, thus ensuring the utilization efficiency of the photovoltaic panels while fully utilizing wave energy.

Description

Technical Field

[0001] This invention relates to the field of new energy technology for generating electricity using renewable energy, and in particular to a wave energy and solar energy combined power generation device and its power station. Background Technology

[0002] In addressing issues such as the energy crisis and climate change, renewable energy power generation, as the core of new energy development, has been widely applied across various industries.

[0003] Wave energy, as one of the most important energy sources in the ocean, is an inexhaustible and renewable clean energy source that can provide power for national defense, marine development, and other activities in distant waters. Currently, the utilization rate of wave energy is relatively low.

[0004] Solar energy, as a clean and renewable energy source, has no geographical limitations. Its development and utilization do not pollute the environment; it is one of the cleanest energy sources, and its reserves are enormous. Solar photovoltaic (PV) panels, as the primary medium for converting light energy, have wide applications. They are a new type of power generation system that uses solar cell semiconductor materials to directly convert solar radiation energy into electrical energy through the photovoltaic effect. Currently, photovoltaic power generation technology is mature, has high power generation efficiency, and is a widely used technology.

[0005] Chinese patent application CN113726266A discloses a combined ocean wave energy and solar energy power generation system, including wave energy generation components installed around an island, solar energy generation components mounted on the island, a DC grid-connected module, an energy storage module, and an inverter module. Both the wave energy generation components and the solar energy generation components are connected to the input of the DC grid-connected module, and the output of the DC grid-connected module is connected to the energy storage module. The energy storage module is connected to the power grid through the inverter module. This solution requires an island to establish the solar energy generation components, making it unsuitable for applications in remote sea areas and marine development environments lacking island support.

[0006] Chinese patent application CN113148015A discloses a marine buoy that utilizes wave energy and solar energy to generate electricity. It includes a shell and a piezoelectric energy harvesting mechanism. The shell houses a sensor and has a polyhedral structure. A solar panel is installed on the outside of the shell. The piezoelectric energy harvesting mechanism is fixed at both ends inside the shell. The mechanism includes a support frame with multiple evenly distributed circular shells. These circular shells are located inside the shell via the support frame and have piezoelectric ceramic plates on them. Under the influence of ocean waves, the circular shells vibrate and deform on the support frame, causing the piezoelectric ceramic plates to deform and generate electricity. The solar panel converts solar energy into electrical energy to power the sensor. In this design, the solar panel is mainly used to power the power-consuming components, and the overall structure, being a buoy, has limited solar energy capacity and low solar energy utilization efficiency.

[0007] Therefore, how to combine solar and wave energy to generate electricity on the ocean, and how to make fuller use of solar and wave energy, is a technical problem facing this field. Summary of the Invention

[0008] The purpose of this invention is to provide a wave energy and solar energy combined power generation device and power station to solve the problems existing in the prior art. Under the action of wave energy, the passive piston pump is activated by the up-and-down swing of the hinged pontoon, and then the wave energy is used to drive the operation of the water turbine generator to generate electricity. At the same time, photovoltaic panels are also installed on the pontoon to generate electricity using solar energy. The whole device can realize the combined power generation of wave energy and solar energy. When the pontoon swings, the orientation of the photovoltaic panels can be kept roughly unchanged, so as to make full use of wave energy and ensure the utilization efficiency of the photovoltaic panels.

[0009] To achieve the above objectives, the present invention provides the following solution:

[0010] This invention provides a wave energy and solar energy combined power generation device, including pontoons and photovoltaic panels. Adjacent pontoons are hinged laterally to the same horizontal axis. The photovoltaic panels are inclined to the south or arranged horizontally on the surface of the pontoons. A connecting rod perpendicular to the horizontal axis is hinged on the horizontal axis. A hydro-generator and a passive piston pump for driving the hydro-generator are installed inside the pontoons. The piston rod of the passive piston pump is hinged to the connecting rod at a position away from the horizontal axis. When adjacent pontoons swing up and down around the horizontal axis, the passive piston pump completes the action of water intake and drainage, and drives the hydro-generator to operate when draining water.

[0011] Preferably, the pontoon rotates no more than 30° around the horizontal axis.

[0012] Preferably, the passive piston pump is provided on both the upper and lower sides of the horizontal shaft, and the passive piston pumps on different sides are used to drive the same hydro-generator.

[0013] Preferably, the passive piston pumps are symmetrically arranged on both sides of the hydro-generator in the axial direction of the horizontal axis, and the passive piston pumps on the same float drive the same hydro-generator.

[0014] Preferably, the pontoon is provided with a water tank, and the buoyancy of the pontoon is adjusted by adjusting the water volume inside the water tank, and the draft of the pontoon is adjusted to meet the water intake of the passive piston pump.

[0015] Preferably, the water tanks are spaced on both sides of the passive piston pump, and the turbine generator is located in the middle of the entire pontoon.

[0016] Preferably, the piston of the passive piston pump is equipped with a one-way valve. When the piston moves outward, water enters the piston chamber, and when the piston moves inward, water is drained from the piston chamber.

[0017] The present invention also provides a power station that uses the wave energy and solar energy combined power generation device as described above, including a power generation unit composed of a plurality of the aforementioned floating boxes connected in series. The arrangement direction of the power generation unit is consistent with the prevailing wind direction of the deployment site, and the photovoltaic panels are tilted to the south. In areas where the wind direction is uncertain, the photovoltaic panels are arranged horizontally.

[0018] Preferably, the passive piston pump is provided only on the side of the end pontoon that is connected to the adjacent pontoon.

[0019] Preferably, the system includes multiple power generation units, with adjacent power generation units connected laterally by cables, and the ends of the power generation units connected to a horizontal beam by cables. The horizontal beam floats on the sea surface and is fixed to the seabed by an anchoring system.

[0020] The present invention achieves the following technical effects compared to the prior art:

[0021] (1) The present invention utilizes the hinged pontoon to swing up and down under the action of wave energy to realize the action of passive piston pump, and then uses wave energy to drive water turbine generator to generate electricity. At the same time, photovoltaic panels are also installed on the pontoon to generate electricity using solar energy. Overall, it can realize the combined generation of wave energy and solar energy. When the pontoon swings, the orientation of the photovoltaic panels can remain roughly unchanged, thus ensuring the utilization efficiency of the photovoltaic panels while making full use of wave energy.

[0022] (2) The pontoon of the present invention rotates up and down around the horizontal axis by no more than 30°, which can effectively utilize wave energy and effectively avoid the passive piston pump jamming caused by excessive rotation of the pontoon, ensuring the normal operation of the pontoon swinging up and down and ensuring the smooth operation of the passive piston pump.

[0023] (3) The passive piston pump of the present invention is set on both the upper and lower sides of the horizontal axis. The passive piston pumps set on the same float are all connected to the same water turbine generator. Whether the float swings up or down, it can drive the water turbine generator to run, ensuring the utilization efficiency of wave energy.

[0024] (4) The passive piston pumps of the present invention are symmetrically arranged on both sides of the turbine generator in the axial direction of the horizontal axis. The water tanks are spaced on both sides of the passive piston pumps. The turbine generator is located in the middle of the entire floating box. The passive piston pumps on the entire floating box are arranged around the single turbine generator, which can improve the driving efficiency of the turbine generator. The overall arrangement is uniform, ensuring the smooth up and down swing of the floating box and further improving the utilization efficiency of wave energy.

[0025] (5) The present invention has a water tank on the pontoon. The buoyancy of the pontoon can be adjusted by adjusting the amount of water in the water tank. The draft of the pontoon can be adjusted to meet the water intake requirements of the passive piston pump, ensuring that the passive piston pump can operate smoothly. At the same time, ensuring a suitable draft can also prevent seawater from submerging the photovoltaic panel and avoid affecting the photovoltaic power generation of the photovoltaic panel. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a top view of a single pontoon of the present invention;

[0028] Figure 2 for Figure 1 Sectional view of AA;

[0029] Figure 3 for Figure 1 BB section view;

[0030] Figure 4 This is a schematic diagram of the structure of the pontoon connection of the present invention;

[0031] Figure 5 This is a perspective view of the floating box structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the connection between adjacent pontoons in this invention;

[0033] Figure 7 This is a diagram showing the state of the pontoon of the present invention as it oscillates with the waves.

[0034] Figure 8 This is a schematic diagram of the power generation unit structure composed of pontoons connected in series according to the present invention;

[0035] Figure 9 This is a schematic diagram of a power station formed by connecting multiple generator sets according to the present invention;

[0036] Among them, 1. Float box; 2. Passive piston pump; 3. Piston rod; 4. Hydro-generator; 5. Impeller; 6. Pipe; 7. Water tank; 8. Horizontal shaft; 9. Ball joint; 10. Connecting rod; 11. Photovoltaic panel; 12. Horizontal beam; 13. Cable; 14. Rope. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The purpose of this invention is to provide a wave energy and solar energy combined power generation device and power station to solve the problems existing in the prior art. Under the action of wave energy, the passive piston pump is activated by the up-and-down swing of the hinged pontoon, and then the wave energy is used to drive the operation of the water turbine generator to generate electricity. At the same time, photovoltaic panels are also installed on the pontoon to generate electricity using solar energy. The whole device can realize the combined power generation of wave energy and solar energy. When the pontoon swings, the orientation of the photovoltaic panels can be kept roughly unchanged, so as to make full use of wave energy and ensure the utilization efficiency of the photovoltaic panels.

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1-9As shown, this invention provides a wave energy and solar energy combined power generation device, including a floating box 1 and a photovoltaic panel 11. Adjacent floating boxes 1 are hinged to the same horizontal axis 8 on their sides. When the floating box 1 is a cuboid box, a hinge structure is provided on one of its long sides. The hinge structure can be in the form of triangular lugs, with the hinge at the tip of the triangular lugs, ensuring that adjacent floating boxes 1 can rotate relative to each other without interference. The photovoltaic panel 11 can receive sunlight and convert solar energy into electrical energy. To better receive sunlight, depending on the application environment, the photovoltaic panel 11 can be tilted towards the south or arranged horizontally on the surface of the floating box 1. The horizontal axis 8 is parallel to the side of the floating box 1. When the two floating boxes 1 are impacted by waves, they can rotate or swing relative to each other around the horizontal axis 8. During rotation or swinging, each floating box 1 moves as a whole, achieving a relatively stable swinging state, thus fully utilizing wave energy. A connecting rod 10, perpendicular to the horizontal axis 8, is hinged to the horizontal axis 8. The connecting rod 10 connects to the piston rod 3, transmitting the swing of the float 1 to the movement of the piston, and constraining and limiting the relative position of the piston rod 3 to ensure smooth piston operation. Specifically, the float 1 is equipped with a hydro-generator 4 and a passive piston pump 2 for driving the hydro-generator 4. One or more passive piston pumps 2 can be provided, and when multiple are provided, different passive piston pumps 2 can be connected to the same hydro-generator 4. The passive piston pump 2 includes a piston chamber and a piston disposed in the piston chamber. The piston is connected to a piston rod 3. The end of the piston rod 3 not connected to the piston is hinged to the connecting rod 10 via a ball joint 9, and this hinge position is located away from the horizontal axis 8. When the adjacent float 1 swings up and down around the horizontal axis 8, the piston rod 3 can drive the piston to move, thereby changing the volume of the piston chamber and realizing the action of water intake and drainage. The discharge port of the passive piston pump 2 is connected to the impeller 5 of the hydro-generator 4 via a conduit 6. During drainage, it can drive the hydro-generator 4 to operate, and the remaining water after passing through the hydro-generator 4 can be discharged back into the seawater. This invention utilizes the up-and-down swinging of the hinged pontoon 1 under the action of wave energy to realize the action of the passive piston pump 2, thereby using wave energy to drive the hydro-generator 4 to generate electricity. At the same time, a photovoltaic panel 11 is also installed on the pontoon 1, which uses solar energy to generate electricity. Overall, it can realize the combined power generation of wave energy and solar energy. When the pontoon 1 swings, since the pontoon 1 only swings up and down, the orientation of the photovoltaic panel 11 can remain roughly unchanged, thus ensuring the utilization efficiency of the photovoltaic panel 11 while making full use of wave energy.

[0041] Combination Figure 7As shown, the vertical rotation angle of the float 1 around the horizontal axis 8 has a certain range, for example, not exceeding 30°. This angle range can effectively utilize wave energy and effectively avoid the passive piston pump 2 from jamming due to excessive rotation angle of the float 1, ensuring the normal operation of the vertical swing of the float 1 and the smooth operation of the passive piston pump 2. In addition to the limiting of the piston rod 3 by the connecting rod 10, the deflection angle range of the float 1 can also be constrained by the limiting structure set between adjacent floats 1. For example, by designing the angle of the triangular ear plate, the two sides of the triangular ear plate serve as limiting parts.

[0042] like Figures 4-7 As shown, the passive piston pump 2 is installed on both the upper and lower sides of the horizontal shaft 8. The passive piston pump 2 on different sides is used to drive the same hydro-generator 4. Therefore, whether the float box 1 swings up or down, it can drive the hydro-generator 4 to operate, ensuring the utilization efficiency of wave energy.

[0043] The passive piston pumps 2 are symmetrically arranged on both sides of the turbine generator 4 in the axial direction of the horizontal axis 8. The passive piston pumps 2 on the same float 1 drive the same turbine generator 4. In this invention, the turbine generator 4 is located in the middle of the entire float 1. The passive piston pumps 2 on the entire float 1 are arranged around the single turbine generator 4, which can improve the driving efficiency of the turbine generator 4. Moreover, the overall arrangement is uniform, ensuring the stability of the float 1 when swinging up and down, and further improving the utilization efficiency of wave energy.

[0044] like Figure 1 , Figure 2 and Figure 5 As shown, the pontoon 1 is equipped with a water tank 7, which can store a certain amount of seawater. By adjusting the water volume inside the water tank 7, the buoyancy of the pontoon 1 can be adjusted, thereby adjusting the draft of the pontoon 1. The draft primarily meets the water intake requirements of the passive piston pump 2, ensuring that 90% of the entire pontoon 1 is submerged below the sea surface, guaranteeing that each passive piston pump 2 is completely submerged. In this way, seawater can be continuously supplied to the turbine generator 4, ensuring the smooth operation of the passive piston pump 2. At the same time, maintaining a suitable draft also prevents seawater from submerging the photovoltaic panel 11, avoiding any impact on the photovoltaic power generation of the photovoltaic panel 11. The water tank 7 can be a piston-type water tank, with its bottom connected to the seawater. The water volume inside the water tank 7 is adjusted by the up and down movement of the piston to draw in or discharge seawater.

[0045] Water tanks 7 are spaced apart on both sides of the passive piston pump 2 and are evenly distributed on the pontoon 1. The turbine generator 4 is located in the middle of the pontoon 1, that is, at the centroid of the pontoon 1. This allows the pontoon 1 to remain relatively stable when it is swaying due to the impact of waves.

[0046] To ensure the smooth operation of the passive piston pump 2, a one-way valve is installed on the piston of the passive piston pump 2. When the piston moves outward, water enters the piston chamber; when the piston moves inward, water is discharged from the piston chamber. More specifically, when the connection between two adjacent floats 1 is at a wave crest, the piston rod 3 of the passive piston pump 2 located at the upper part of the float 1 is pulled out, and seawater is drawn into the piston chamber through the one-way valve. As the piston rod 3 of the passive piston pump 2 located at the lower part of the float 1 is pushed in, the seawater is pumped out and flows through the conduit 6 to the impeller 5 of the turbine generator 4, driving the impeller 5 to rotate and generate electricity. The seawater is then discharged back into the sea through the lower wake pipe of the turbine generator 4. When the connection between two adjacent floats 1 is at a wave trough, the floats 1 and piston move in opposite directions, resulting in a similar effect.

[0047] like Figure 8 , Figure 9 As shown, this invention also provides a power station utilizing the wave energy and solar energy combined power generation device described above, comprising a power generation unit composed of several floating boxes 1 connected in series. To fully utilize wave energy, the arrangement direction of the power generation unit is consistent with the prevailing wind direction of the deployment location. In areas where the prevailing wind direction is north-south, the entire power generation unit can be arranged along the north-south direction with a relatively fixed position. In this case, the photovoltaic panels 11 can be tilted southward. In areas where the prevailing wind direction is not north-south but the direction is relatively fixed, the power generation unit of the floating boxes 1 can be arranged along the prevailing wind direction, and the direction of the photovoltaic panels 11 can be adjusted to tilt them southward. In areas where the wind direction is uncertain, the photovoltaic panels 11 can also be arranged horizontally. The floating boxes 1 utilize wave energy while also serving as a support system for the solar photovoltaic power generation device, greatly saving investment in offshore photovoltaic power stations.

[0048] By installing photovoltaic panels 11 on the pontoon 1, the photovoltaic panels 11 can be used to block the wind direction, which can further amplify the oscillation frequency or intensity of the pontoon 1 in conjunction with the wave motion. This can better improve the operating frequency and intensity of the passive piston pump 2, that is, drive a more powerful hydro-generator 4 or increase the speed of the impeller 5 in the hydro-generator 4, effectively improving the power generation efficiency of the hydro-generator 4. Therefore, wave energy and solar energy are not only combined in terms of energy form, but also play a certain promoting role in structure.

[0049] Since the generator set consisting of the floats 1 cannot be infinitely long, the end floats 1 can be equipped with a passive piston pump 2 only on the side connected to the adjacent float 1, while the other side can be a closed structure. This avoids the waste of function on the unconnected side of the float 1 caused by using the same float 1 at the tail as the middle part, and reduces investment costs.

[0050] like Figure 9As shown, the system includes multiple power generation units. Adjacent power generation units are laterally connected by cables 14. The ends of the power generation units are connected to a horizontal beam 12 by cables 13. The horizontal beam 12 floats on the sea surface and is fixed to the seabed by an anchoring system. In the entire power station, the pontoons 1 on the same power generation unit are connected by horizontal shafts 8, connecting rods 10, and ball joints 9. The pontoons 1 on different power generation units are flexibly connected by cables 14. Each power generation unit is flexibly connected to the horizontal beam 12 by cables 13, forming an integrated and stable structure. The power generation of each power generation unit has a relatively reduced impact, allowing it to float on the sea surface and maintain relative stability while successfully achieving combined power generation using wave energy and solar energy.

[0051] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A wave energy and solar energy combined power generation device, characterized in that: The system includes pontoons and photovoltaic panels. Adjacent pontoons are hinged laterally to the same horizontal axis. The photovoltaic panels are arranged at an angle to the south or horizontally on the surface of the pontoons. A connecting rod perpendicular to the horizontal axis is hinged to the horizontal axis. A hydro-generator and a passive piston pump for driving the hydro-generator are installed inside the pontoons. The piston rod of the passive piston pump is hinged to the connecting rod at a position away from the horizontal axis. When adjacent pontoons swing up and down around the horizontal axis, the passive piston pump completes the action of water intake and drainage, and drives the hydro-generator to operate when draining water. The passive piston pump is installed on both the upper and lower sides of the horizontal axis, and the passive piston pumps on different sides are used to drive the same hydro-generator.

2. The wave energy and solar energy combined power generation device according to claim 1, characterized in that: The pontoon rotates no more than 30° around the horizontal axis.

3. The wave energy and solar energy combined power generation device according to claim 1, characterized in that: The passive piston pumps are symmetrically arranged on both sides of the hydro-generator in the axial direction of the horizontal axis, and the passive piston pumps on the same float drive the same hydro-generator.

4. The wave energy and solar energy combined power generation device according to claim 1, characterized in that: The pontoon is equipped with a water tank. The buoyancy of the pontoon is adjusted by adjusting the water volume inside the water tank, and the draft of the pontoon is adjusted to meet the water intake requirements of the passive piston pump.

5. The wave energy and solar energy combined power generation device according to claim 4, characterized in that: The water tanks are spaced on both sides of the passive piston pump, and the turbine generator is located in the middle of the entire pontoon.

6. The wave energy and solar energy combined power generation device according to claim 1, characterized in that: The passive piston pump is equipped with a one-way valve on the piston. When the piston moves outward, water enters the piston chamber, and when the piston moves inward, water is drained from the piston chamber.

7. A power station using a wave energy and solar energy combined power generation device as described in any one of claims 1-6, characterized in that: The device includes a power generation unit consisting of several floating boxes connected in series. The arrangement of the power generation unit is in the same direction as the prevailing wind direction at the deployment site. The photovoltaic panels are tilted to the south. In areas where the wind direction is uncertain, the photovoltaic panels are arranged horizontally.

8. The power plant according to claim 7, characterized in that: The passive piston pump is only provided on the side of the end pontoon that is connected to the adjacent pontoon.

9. The power plant according to claim 7, characterized in that: It includes multiple power generation units, adjacent power generation units are laterally connected by cables, and the ends of the power generation units are connected to a horizontal beam by cables. The horizontal beam floats on the sea surface and is fixed to the seabed by an anchoring system.

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