Marine natural-energy multi-generation apparatus

Abstract

To provide a marine natural-energy multi-generation apparatus that can effectively utilize wind power, wave height, sunlight, and other renewable energies at sea as an integrated power-generation facility at low cost.SOLUTION: In offshore power generation, a wave power generation apparatus using vertically movable electromagnetic force is provided on a wind power generation apparatus to integrate the wind-power and wave-power generation apparatuses. Furthermore, a solar power generation apparatus is provided on the entire surface of a float extended from the wind power generation apparatus to integrate them. Wind power, wave power, sunlight and other renewable energies offshore are effectively utilized as an integrated power-generation facility at low cost.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to a power generation device that utilizes wind power, wave height, and sunlight at sea. [Background technology]

[0002] As efforts to reduce CO2 emissions gain momentum, power generation using natural energy (renewable energy) is becoming more widespread. Conversion efficiencies are, for example, 20% for solar power generation, approximately 20% for biomass power generation, 10-20% for geothermal power generation, and 20-40% for wind power generation. Wind power generation is highly efficient, and is being vigorously developed both domestically and internationally. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-056705 Summary of the Invention [Problem to be solved by the invention]

[0004] Technical Document 1, for which the applicant of the present application is the inventor, describes a device that combines wind power and solar power generation, but the amount of solar power generated is very small, so it is only sufficient to supply power to internal equipment and does not constitute power generation using natural energy, and when wind turbines are installed on land, they must be installed in a remote location with strong winds and care must be taken to avoid noise and other problems, resulting in significant locational limitations. Therefore, when attempting to install a wind turbine on the sea, although a large area can be secured, enormous construction costs are required, including foundation work, installation work, submarine cables, offshore substations and other ancillary equipment, and maintenance. Furthermore, although it is easy to obtain other natural energy sources when generating electricity at sea, using only wind is an extremely inefficient use of natural energy, and there is a lot of unused natural energy at sea. The problem that the present invention aims to solve is to effectively utilize wind power, wave height, sunlight, and other renewable energy sources at sea as an integrated power generation facility at low cost. [Means for solving the problem]

[0005] The means for solving this problem are: For generating electricity offshore, this device combines the energy of wind and waves by attaching a wave power generation device that uses electromagnetic force that moves up and down to a wind power generation device, and / or by attaching a photovoltaic power generation device (solar) to the entire surface of an extended float of the wind power generation device to generate electricity. Furthermore, it also integrates a power generation device that utilizes tidal currents, sunlight, and water temperature differences. [Effects of the Invention]

[0006] 1. It kills two birds with one stone by converting offshore natural energy into electrical energy very efficiently, and it can reduce the cost of electricity compared to conventional wind power generation. 2. It will reduce CO2 emitting facilities such as thermal power plants that have been supplied until now, improving the environment. 3. Even when there is no wind, electricity can be generated continuously using waves. 4. Solar power generation is possible even when the waves are not high and the sea surface is calm. 5. By generating electricity using the flow of seawater caused by tides and currents, electricity can be produced stably, regardless of seasonal fluctuations in wind, sunlight, etc. [Brief explanation of the drawings]

[0007] [Figure 1] This is a well-known method, and is a bottom-mounted wind power generation device. [Figure 2] This is a known method, a floating wind power generation device. [Figure 3] FIG. 1 is a diagram showing the entire configuration of a first embodiment of the present invention. [Figure 4] FIG. 1 is a cross-sectional view showing a power generating portion that uses wave power in a first embodiment of the present invention. [Figure 5]FIG. 10 is a cross-sectional view showing a power generating portion that uses wave power in a second embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing a third embodiment of the present invention. [Figure 7] FIG. 10 is a diagram showing a fourth embodiment of the present invention. [Figure 8] 10A and 10B are side and front views of a nacelle 102 and blades 101 according to a fifth embodiment of the present invention. [Figure 9] FIG. 10 is a diagram showing a sixth embodiment of the present invention. [Figure 10] FIG. 10 is a diagram showing a seventh embodiment of the present invention. [Figure 11] FIG. 13 is a diagram showing an example of blade afterimage advertising in the seventh embodiment of the present invention. [Figure 12] FIG. 10 is a diagram showing an eighth embodiment of the present invention. [Figure 13] FIG. 13 is a diagram showing a ninth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0009] 1 and 2 show a known offshore wind power generating device. Figure 1 shows a bottom-mounted wind power generation system 1, with a foundation 104 on the seabed 3, a power generation tower 103 protruding from the sea surface 2, and a nacelle 102 equipped with power generation equipment with a wind turbine 101 attached to the top end. The generated electricity is transmitted through the tower 103 via an undersea underground cable 4 to a location on land where it can be received. The bottom-fixed wind turbine generator 1 is not used in deep seas, but is installed in shallow areas close to the coastline (for example, at a depth of 0 to 60 m). As a wind turbine generator, since it is close to the coast and the winds are not as strong as those in the open ocean, it is extremely inefficient to use the foundations and infrastructure that have been constructed only to utilize wind power, and the challenge is how to efficiently use energy sources that can be obtained from waves, sunlight, and other natural sources.

[0010] 2 shows a floating wind turbine generator 1, in which a tower 103 is fixed to the seabed 3 or floats with a tower fixing device 105 such as a wire. This system can also be used in the ocean with a certain degree of depth (for example, a depth of 60 m or more). The deeper the ocean is, the farther from the coast the stronger the wind power is, making wind power generation more effective. However, the undersea power cables can stretch for tens of kilometers, making maintenance difficult and costly. Furthermore, when simultaneously using energy from waves, sunlight, and other natural sources, it is important to keep costs down and create a simple, easy-to-maintain structure.

[0011] [First embodiment] As shown in FIG. 3, the first embodiment of the present invention is a system in which a wave power generation device 5 is integrated with the tower of a bottom-mounted wind power generation device 1 to generate power.

[0012] The bottom-mounted wind power generation device 1 is composed of an underground foundation 104 buried in the seabed 3, a tower 103 that serves as a support above that, blades 101 at the top, and a container nacelle 102 that converts the rotation of the blades into electrical energy and has other base materials installed. A wave power generation device 5 is installed around the tower 103 near the sea surface 2 of the tower 103. The wave power generation device 5 is composed of a donut-shaped float 52 with a magnet 51 inside and a coil 53 attached to the tower 103, with a space between the coil 53 and the magnet 51 allowing the float 52 to move up and down freely.

[0013] The operation will be described. Wind power generation involves detecting the wind direction using a detector and driver installed in the nacelle 102, and then using a motor or the like to align the blades 101 with the wind direction, causing the blades to rotate their rotating shaft. The rotating shaft is connected to a generator inside the nacelle, which converts the power into electricity, which is then transmitted to the offshore power plant and onshore via cable 4 (not shown). Furthermore, wave power generation is achieved by waves 2, that is, wave power, which moves the float 52 and magnet 51 up and down, generating electromotive force in the coil 51 through electromagnetic induction, thereby generating electricity. The coil size, number of turns, and magnet strength and size can be determined arbitrarily and adjusted to obtain maximum electrical energy in response to wave force. The generated electricity (although it is a non-sine wave) is passed through a converter (not shown) installed inside the tower, synchronized with the electricity generated by the wind power generation, and then boosted to, for example, an AC sine wave, and sent through cable 4 to the offshore substation and onshore.

[0014] 4 shows a cross-sectional view of the coil 53 and the magnet 51 in the first embodiment of the present invention. The coil 53 is wound vertically or horizontally in multiple turns around the tower 103, and the magnet 510 faces the coil 53 at a distance. The magnet 510 can be moved in accordance with the wave height by a vertical movement device 54 such as a roller or bearing. Although the drawing does not show any space for vertical movement, the coil 53 is dispersed, and the float 52 or magnet 510 can move above and below the coil 53. The power generated from the coil 53 flows through a converter (not shown) to the cable, as explained in FIG.

[0015] Although the present invention has been described in terms of a bottom-fixed type, the present invention is not limited to the bottom-fixed type, and may also be applied to a floating type.

[0016] According to the first embodiment of the present invention, the up and down movement of wave power can be used to generate electricity using the tower 103, which reduces the cost of the wave power generation device, and by using a magnet-based power generation method, there are almost no rotating drive parts, which improves maintenance. Furthermore, because the structure is simple, the float can be moved to a height where the tower 103 can withstand typhoons, storms, etc., but does not come into contact with the blades, and a large amount of electricity can be generated even against large waves.

[0017] [Second embodiment] In the first embodiment of the present invention, as shown in FIG. 5, a plurality of divided magnets 511 are used in the second embodiment. For example, if the wind power generation is in the 10 MW class, the tower 103 will have a diameter of 3 m or more, and the magnet 510 in the first embodiment will be huge and have special specifications, making it very expensive. Therefore, a plurality of divided magnets 511 that are readily available on the market are used.

[0018] This improves maintainability and is cost-effective.

[0019] [Third embodiment] As shown in FIG. 6, the third embodiment of the present invention is configured by providing a solar facility (solar panel) 6 to the system of the first or second embodiment. Furthermore, a solar facility (solar panel) 6 may be provided on top of the nacelle. Furthermore, the blades and tower surfaces may also be provided with solar films.

[0020] The float 52 of the wave power generation system is deployed to widen its width, thereby widening the solar area. For example, if it is installed on a wave power generation system with a radius of 50 m (Tower 103 has a radius of 2 m, for example), the power generation capacity will be about 1.4 MW. When the waves are high, the floats 52 and solar 6 equipment of this wave power generation system can be retracted to a width of several meters. This prevents damage such as peeling off of the solar panels due to waves and wind. Also, when the waves are calm, the floats and solar equipment can be extended, allowing solar power generation over a wide area around the tower 103.

[0021] Although the present invention has been described in terms of a bottom-fixed type, the present invention is not limited to the bottom-fixed type, and may also be applied to a floating type.

[0022] According to the third embodiment of the present invention, by providing a wind power generation system with a wave power generation system and / or solar equipment, a large space can be easily and inexpensively secured, and on fine days, power generation can be carried out efficiently without obstructions on the sea. In addition, on sunny days when the waves are calm, solar power generation can be performed using the wave power generation float 52 to supplement the reduced efficiency of wind and wave power generation, and when the waves are high or the weather is bad, power can be supplemented by wave power generation, thereby increasing the overall efficiency of using renewable energy.

[0023] [Fourth embodiment] As shown in Figure 7, the fourth embodiment of the present invention is the same as the third embodiment of Figure 6, except that a screw or blade is provided in the underwater part of the tower 103 of the wind turbine generator 1, and a power generation facility 7 that uses tidal currents is provided. The screw or blade may be configured to be rotatable around the tower so that it can be aligned with the direction of the tidal current. The rotation generated in the shaft supporting the screw or blade is converted into electricity by a generator and transmitted to shore via cable. Alternatively, a partition wall may be provided on the seabed that expands from the tower outward to generate a fast tidal current, causing the screw or blades to rotate at high speed.

[0024] Although the present invention has been described in terms of a bottom-fixed type, the present invention is not limited to the bottom-fixed type, and may also be applied to a floating type.

[0025] According to the fourth embodiment of the present invention, by integrating power generation that also utilizes tidal currents, it is possible to add tidal power generation equipment 7 to wind power generation equipment in places with strong tidal currents or large tidal differences, thereby reducing costs and enabling more efficient use of renewable energy.

[0026] In the fifth embodiment of the present invention, as shown in FIG. 8, solar material 601 is provided on the surface of the blade 101 of the wind power generator 1. It is preferable to form a blade solar material 601 that also serves as the outer wall of the blade 101 by attaching a reinforcing material such as transparent hard plastic to the solar panel by, for example, roll-bonding, so that it can withstand wind, rain, collisions, etc. Furthermore, it is preferable to temporarily store and utilize static electricity generated by the rotation of the blade 101 in the air in a capacitor at the same time. The electricity generated by the solar material 601 passes through the wind turbine shaft, is temporarily charged in the nacelle, and is transmitted to land via cables along with electricity obtained by other means.

[0027] According to the fifth embodiment of the present invention, by attaching solar panels to wind turbine blades, the blades are twisted so that the panels face in all directions, which has the effect of being able to receive sunlight at any time of day. In addition, by also serving as the outer wall of the blades, it has the effect of being lighter than simply attaching solar panels.

[0028] As shown in Figure 9, the sixth embodiment of the present invention is a system in which a floating wind turbine generator 1 is equipped with a wave power generator 5, a solar power generator 6, and solar material 601 on the blades, and the power storage facility (not shown) is also floating. Power is transmitted to the power storage facility via a power transmission line 401, and electricity is supplied to land by, for example, transmitting wirelessly or by transporting the storage battery itself.

[0029] According to the sixth embodiment of the present invention, because it is a floating type, it can be installed more than 30 kilometers from land and in deep water (for example, more than 100 meters), and since there is a floating power storage facility nearby, it can be moved, so it can be installed in places with strong winds or high waves, and even more electricity can be obtained.In addition, because each power generation device is manufactured as a single unit, it can be constructed more compactly than a single unit, and electricity costs can be reduced. Furthermore, since the electricity is stored in batteries, there is no disadvantage to setting up the system far from land.

[0030] The seventh embodiment of the present invention is characterized in that, as shown in Fig. 10, LEDs 81 are attached to the blades 101 of a wind turbine generator 1, and a flashing circuit 82 displays images and videos 83, such as text information messages and advertisements, using residual phenomena, as shown in Fig. 11. The flashing circuit detects wind speed and the rotation of the wind turbine, and flashes the LEDs so that an residual image remains. In addition, by having a flashing circuit installed in the tower of the wind turbine generator and a flashing circuit that can be controlled remotely from land, it can also be used in emergencies.

[0031] According to the seventh embodiment of the present invention, since the light is turned on at night, it has the effect of providing text information and serving as a substitute for a buoy or a lighthouse, and furthermore, collisions with the wind turbine generator 1 can be avoided in advance.

[0032] As shown in Figure 12, the eighth embodiment of the present invention is characterized in that an ocean thermal energy conversion device 9 is installed on the tower 103 of a wind turbine generator 1, and deep seawater 92 and surface water 91 are taken in from the seabed to generate electricity using the temperature difference.

[0033] According to the eighth embodiment of the present invention, seawater is used in a wind turbine power generation device installed away from land, which has the effect of making it possible to obtain a large temperature difference.

[0034] As shown in FIG. 13, the ninth embodiment of the present invention is characterized in that a hydrogen generator 10 is provided on the tower 103 of a wind power generation plant 1, and air is reduced to hydrogen using electricity generated by wind power or the like, and the hydrogen is utilized as energy.

[0035] According to the ninth embodiment of the present invention, hydrogen is produced without storing electricity generated by wind power or the like, which has the effect of allowing for smaller storage facilities and reducing losses due to power transmission. [Industrial Applicability]

[0036] By making maximum use of renewable energy used at sea to generate electricity, CO2 emissions from power generation can be reduced, helping to save the global environment. The industrial applicability is extremely high. [Explanation of symbols]

[0037] 1. Wind power generation equipment 101 Blade 102 Nacelle 103 Tower 104 Seabed fixed foundation 105 Tower fixing fixtures for wires etc. 106 Tower Fixture and Deep Sea Water Intake Pipe 2 sea level 3 Undersea 4. Power lines and communication cables 401 Power transmission lines and communication cables to offshore energy storage facilities 402 Gas delivery pipe 5. Wave power generation device 51 Magnet 510 Large Magnet 511 Small Magnet 52 Float 53 Coil 54 Coro 6 Solar power generation device (panel) 601 Solar material for blades 7 Tidal power generation facilities 8 Blade Afterimage Advertising 81 LED 82 Flashing Circuit 83 Image display example 9 Ocean Thermal Energy Conversion Device 91 Surface water intake 92 Deep water intake 10 Hydrogen generator

Claims

1. This marine natural energy multi-power generation device is characterized by its ability to generate electricity from wind power, wave power, sunlight, temperature difference power, ocean current power, hydrogen production, and image display in an integrated manner in offshore wind power generation.

2. 2. The marine natural energy multi-power generation device according to claim 1, wherein the hydrogen is produced by desalination and reduction of atmospheric moisture or seawater using generated electricity.

3. 2. The marine natural energy multi-power generation system according to claim 1, wherein a solar film is provided on the surface of the blades and tower of the wind-powered power generation system.

Images