Floating offshore wind power plant with propulsion unit and hydrogen plant

Abstract

To provide a floating body type offshore wind power station with no necessity for a chain or a wire rope, etc., to retain the offshore wind power station to sea bottom, to have the floating body type offshore wind power station retained in the same place offshore by utilizing a propulsion device by power generated in the wind power station, as well as being capable of storing hydrogen generated by electrolysis of water.SOLUTION: A floating body type offshore wind power generation station is provided composed to self propel a propulsion device by power generated in the floating body type offshore wind power generation device by; constructing a tower unit arranged offshore and a buoyancy body unit arranged underwater by reinforced concrete structure; coupling the tower unit and the floating body unit by a plurality of pieces of support rods; installing a water electrolysis device and a hydrogen liquefaction device for generating hydrogen by electrolysis of water by electricity generated in the floating type offshore wind power generation station in a housing of the tower unit; attaching a liquid hydrogen storage tank inside the floating body unit; and furthermore attaching the propulsion device to the floating body unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a floating offshore wind power plant that uses electricity generated by wind power to electrolyze water in a water electrolysis device to produce hydrogen, and is configured to be self-propelled by a propulsion device. [Background technology]

[0002] In recent years, with the increase in the use of renewable energy, there are no obstacles blocking the wind offshore, and the wind direction and speed are constant and unchanging, so it is expected that a stable supply of electricity can be obtained. The structure of offshore wind power generation equipment currently in practical use is similar to that of equipment operating on land, and because there are fewer constraints on installation offshore than on land, it is expected that offshore installations will increase in the future.

[0003] Currently, the type of offshore wind power generation that is becoming increasingly popular in Europe and other regions, where the support columns reach all the way to the seabed, is suitable for relatively shallow waters of up to about 50m in depth. However, in Japan, the area of ​​the continental shelf where the water is relatively shallow is small, so the country is currently transitioning to floating types, where the wind power generation equipment is floated on the ocean and kept in position by being moored to the seabed with chains, wire ropes, etc.

[0004] A floating offshore wind turbine consists of a floating body placed underwater and a tower erected on the floating body. The top of the tower is equipped with a wind turbine consisting of a nacelle and blades, and the floating offshore wind turbine is maintained in place by being moored to the seabed with chains, wire ropes, etc. With this configuration, it is possible to install a floating offshore wind turbine even in waters about 200 meters deep. Currently, there are four main types of floating offshore wind power technologies in practical use: spar type, semi-submersible type, barge type, and TLP type.

[0005] Conventionally, to install a floating offshore wind power generation device at a designated sea area, the float was towed to the installation area by a barge or the like and moored there, then moored to the seabed by chains, wire ropes or the like, and the superstructure was moved to the top of the float by a crane ship or the like, and the float and superstructure were connected. Summary of the Invention [Problem to be solved by the invention]

[0006] However, the sea areas where floating offshore wind farms are installed, which are 50 meters or deeper, often have harsher oceanographic conditions than the sea areas where general marine construction work is carried out. As a result, installation work for floating offshore wind farms must be carried out under harsh oceanographic conditions only during periods when the oceanographic conditions are relatively calm, which poses a problem of limitations on the timing and duration of installation work.

[0007] Furthermore, the installation of floating offshore wind turbines requires delicate work using large work vessels, which increases construction costs.

[0008] Furthermore, the sea areas around Japan that are 50m to 200m deep are limited, and as a result, the areas where floating offshore wind turbines can be installed are also limited.

[0009] In view of the current situation described above, an object of the present invention is to provide a floating offshore wind power plant that does not require chains, wire ropes, etc. for mooring a floating offshore wind turbine to the seabed, operates a propulsion device using electricity generated by the wind turbine, and moors the floating offshore wind turbine in the same place on the ocean, while storing hydrogen produced by electrolyzing seawater. [Means for solving the problem]

[0010] In order to solve this problem, the invention described in claim 1 is a floating offshore wind power plant that is configured with a tower supporting a nacelle that has multiple blades, a gearbox, and a generator built in, and is installed offshore. The tower section (4) is constructed of a conical reinforced concrete structure, with the top (33) formed as a flat circle, the diameter (A) of the top of the tower section is formed as a circle with a diameter of 5m, the thickness (B) of the tower section upper slab is 500mm, the height (C) of the tower section from the top (33) of the tower section (4) to the tower bottom (39) is 97m, the thickness (D) of the tower bottom slab that forms the tower section base (40) of the tower section (4) is 1m, the diameter (S) of the tower base that forms the tower section base (40) is formed as a circle with a diameter of 25m, and a four-story building (5) with a height of 5m on each floor is constructed at the bottom of the tower section (4). Placed underwater The buoyancy body (8) is cylindrical and constructed of a reinforced concrete structure, with a diameter (N) of 100 m and a height (J) of 10 m excluding the forward inclined part (31) and the rear inclined part (32) of the buoyancy body (8). In order to stably float the floating offshore wind power plant (1) with a propulsion unit and a hydrogen factory constructed on land on the front and rear of the bottom of the buoyancy body (8) on the water, the bottoms in both the forward and rear directions are inclined at an angle of 14 degrees toward the front and rear ends, as shown by the forward inclined part angle (M) and the rear inclined part angle (P). A plurality of ballast water tanks are installed inside the buoyancy body (8), and the buoyancy of the buoyancy body (8) is adjusted by injecting or discharging seawater into the ballast water tanks so that the position of the sea surface (7) is approximately in the center of the vertical direction of the support (6). The inclination of the floating offshore wind power plant (1) with a propulsion unit and an attached hydrogen plant relative to the sea surface (7) is also maintained horizontally by injecting or discharging seawater into the plurality of ballast water tanks. Furthermore, the thickness of the reinforced concrete of the buoyancy body (8), which is constructed with a hollow interior and made of reinforced concrete, is 1 / 2 the thickness of the upper, lower and outer periphery. The buoyancy body (8) has a 4m diameter hole in the center of the top of the buoyancy body (8) to allow the vertical section (34) to pass through. In order to connect the tower section (4) and the buoyancy body (8), eight supports (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), (H) ... The eight columns (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52) are attached vertically so that the center of the column is located at the center of the column. The upper part of the column is attached to the underside of the tower base (40) where the center of the underside of the tower bottom (39) and the center of the buoyancy body (8) are aligned in a straight line. The column (6) is attached to the underside of the tower base (40) where the center of the underside of the tower bottom (39) and the center of the buoyancy body (8) are aligned in a straight line. The column (6) is attached to the tower base (40) where the center of the buoyancy body (8) is aligned in a straight line. The column (6) is attached to the tower base (40) from approximately the top (33) of the tower (4) through the tower base (40) to approximately the bottom of the center of the buoyancy body (8) as shown by the dashed line (C) (41). The propulsion unit (12) is configured to store electricity generated by a generator inside the nacelle (3) in a battery system (59) installed inside the buoyancy body (8) so that a stable power supply can always be provided to the propulsion unit (12). The propulsion unit (12) is then driven by the electricity generated by the generator inside the nacelle (3). This allows the propulsion unit (12) to stay in the same place on the ocean even in windless conditions when the blades (2) do not rotate and the generator does not generate electricity, by utilizing the power of the battery system (59). Two 360-degree rotating pod propulsion units (15) capable of generating thrust almost uniformly in all directions are attached side by side at approximately the center bottom of the buoyancy body section (8), and the rotation speed and rotation angle of the two 360-degree rotating pod propulsion units (15) are operated and driven separately, so that the floating offshore wind power plant (1) with propulsion units and the hydrogen factory attached can be turned in the forward, backward, left and right directions, and the floating offshore wind power plant (1) with propulsion units and the hydrogen factory attached can be moored in the same place on the ocean.A seawater desalination plant (58), a water electrolysis plant (53), and a hydrogen liquefaction plant (54) are installed, and the seawater desalination plant (58) for converting seawater into fresh water using electricity generated by a wind power plant, the water electrolysis plant (53) for electrolyzing fresh water to generate hydrogen, and the hydrogen liquefaction plant (54) for liquefying the electrolyzed hydrogen are operated to produce liquid hydrogen from seawater, and the produced liquid hydrogen is passed through the vertical section (34) and stored in a liquid hydrogen storage tank (57) in a cold box installed inside the buoyancy body section (8).The present invention is characterized by the above-mentioned configuration. [Effects of the Invention]

[0016] According to the invention of claim 1, a floating offshore wind power plant is constructed with a tower supporting a nacelle that houses a plurality of blades, a gearbox, and a generator, and is installed offshore. The tower section (4) is constructed of a conical reinforced concrete structure, with the top (33) formed as a flat circle, the diameter (A) of the top of the tower section is formed as a circle with a diameter of 5m, the thickness (B) of the tower section upper slab is 500mm, the height (C) of the tower section from the top (33) of the tower section (4) to the tower bottom (39) is 97m, the thickness (D) of the tower bottom slab that forms the tower section base (40) of the tower section (4) is 1m, the diameter (S) of the tower base that forms the tower section base (40) is formed as a circle with a diameter of 25m, and a four-story building (5) with a height of 5m on each floor is constructed at the bottom of the tower section (4). Placed underwater The buoyancy body (8) is cylindrical and constructed of a reinforced concrete structure, with a diameter (N) of 100 m and a height (J) of 10 m excluding the forward inclined part (31) and the rear inclined part (32) of the buoyancy body (8). In order to stably float the floating offshore wind power plant (1) with a propulsion unit and a hydrogen factory constructed on land on the front and rear of the bottom of the buoyancy body (8) on the water, the bottoms in both the forward and rear directions are inclined at an angle of 14 degrees toward the front and rear ends, as shown by the forward inclined part angle (M) and the rear inclined part angle (P). Inside the buoyancy body (8), there are several Ballast water tanks are installed, and the buoyancy of the buoyancy body (8) is adjusted by injecting or discharging seawater into the ballast water tank so that the position of the sea surface (7) is approximately in the center of the vertical direction of the support (6). The inclination of the floating offshore wind power plant (1) with a propulsion unit and an attached hydrogen plant relative to the sea surface (7) is also maintained horizontally by injecting or discharging seawater into multiple ballast water tanks. Furthermore, the thickness of the reinforced concrete of the buoyancy body (8), which is constructed with a hollow interior and has a reinforced concrete structure, is 200 mm at the top, bottom, and outer periphery. The floating body (8) was formed with a hole of 4 m in diameter at the center of the top of the floating body (8) to allow the vertical section (34) to pass through. In order to connect the tower section (4) and the floating body (8), eight supports (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), (H) (52) were formed from steel pipes of 2 m in diameter, 30 mm in thickness, and 10 m in length, at positions extending radially every 45 degrees when viewed in a horizontal plane on a circumference of a radius of 1,050 cm from the center of the top surface of the floating body (8). The eight columns (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52) are attached vertically so that the center of the column is located at the center of the buoyancy body (8), and the upper part of the column (6) is attached to the underside of the tower base (40) so that the center of the underside of the tower bottom (39) and the center of the buoyancy body (8) are aligned in a straight line. The column (6) is attached to the underside of the tower base (40) so that the center of the buoyancy body (8) is ... upper part of the column (6) is aligned in a straight line. The column (6) is attached to the tower base (40) so that the center of the buoyancy body (8) is aligned in a straight line. The column (6) is attached to the tower base (40) so that the center of the buoyancy As shown in the figure, the vertical section (34) is formed in a cylindrical shape with a diameter of approximately 4 m, and in order to always supply stable power to the propulsion device (12), electricity generated by the generator inside the nacelle (3) is stored in the battery equipment (59) installed inside the buoyancy body part (8), and then the electricity is used to drive the propulsion device (12).By using the power of the battery equipment (59) even in windless conditions where the blades (2) do not rotate and the generator does not generate electricity, the floating offshore wind power plant (1) with a propulsion device and a hydrogen factory can be kept in the same place on the ocean.The propulsion device (12) is configured so that two 360-degree rotating pod propulsion devices (15) capable of generating thrust almost uniformly in all directions of 360 degrees are attached side by side at the bottom center of the buoyancy body (8), and the rotation speed and rotation angle of the two 360-degree rotating pod propulsion devices (15) can be operated and driven separately, thereby turning the floating offshore wind farm (1) with propulsion devices and equipped with a hydrogen factory in the forward, backward, left and right directions, and mooring the floating offshore wind farm (1) with propulsion devices and equipped with a hydrogen factory in the same place on the ocean. A seawater desalination plant (58), a water electrolysis plant (53), and a hydrogen liquefaction plant (54) are installed inside the building (5) of the power plant (4), and the seawater desalination plant (58) for converting seawater into fresh water using electricity generated by a wind power plant, the water electrolysis plant (53) for electrolyzing fresh water to generate hydrogen, and the hydrogen liquefaction plant (54) for liquefying the electrolyzed hydrogen are operated to produce liquid hydrogen from seawater, and the produced liquid hydrogen is passed through the vertical section (34) and stored in a liquid hydrogen storage tank (57) in a cold box installed inside the buoyancy body section (8). This configuration makes it possible to utilize technology cultivated on construction sites for skyscrapers and other buildings to significantly shorten the number of days required for construction, and to use the electrical output generated by the floating offshore wind farm as a power source to electrolyze water to produce hydrogen, while also using the generated electricity to operate the propulsion device and keep the ship moored in the same location. Example 1

[0022] A first embodiment of the present invention will be described below. [First embodiment of the invention]

[0023] 1 to 5 show a first embodiment of the present invention.

[0024] 1 is a perspective view showing a floating offshore wind farm 1 with a propulsion unit and an attached hydrogen plant according to the present invention, installed offshore. The floating offshore wind farm 1 with a propulsion unit and an attached hydrogen plant comprises three blades 2 attached to a hub 10, a gearbox, a generator, a yaw control device, etc. installed inside a nacelle 3, a steel pipe 11 for attaching the nacelle 3 to a tower section 4, the tower section 4 constructed of a reinforced concrete structure, eight support columns 6 made of steel pipes with a diameter of approximately 2 m, a thickness of approximately 30 mm, and a length of approximately 10 m for connecting the tower section 4 and a buoyancy body section 8, and a buoyancy body section 8 with a hollow interior made of reinforced concrete to function as a floating structure when the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen plant is floated on the ocean and made to stand on its own. Furthermore, multiple ballast water tanks (not shown) are installed inside the buoyancy body section 8 to keep the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen factory horizontal to the sea surface 7 while preventing it from tipping over. By injecting or discharging seawater into the ballast water tanks, the buoyancy of the buoyancy body section 8 is adjusted so that the position of the sea surface 7 is approximately centered vertically between the support columns 6, and the inclination of the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen factory relative to the sea surface 7 can also be adjusted by injecting or discharging seawater into the multiple ballast water tanks so that the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen factory can maintain a horizontal position relative to the sea surface 7. Furthermore, in order to turn seawater into fresh water using the electricity generated by the generator inside the nacelle 3, a seawater desalination plant 58 installed inside the building 3 is operated as shown in the front view of Figure 3b, and furthermore, the fresh water is electrolyzed in a water electrolysis plant 53 to generate hydrogen, and furthermore, in order to operate the propulsion device 12 shown in Figure 3b in a constantly stable state, the electricity generated by the generator inside the nacelle 3 is stored in a storage battery facility 59 installed inside the buoyancy body 8, and then the propulsion device 12 is operated. Note that, in order to improve power generation efficiency, a yaw drive unit (not shown) is attached inside the nacelle 3 so that the blades 2 can rotate 360 ​​degrees relative to the steel pipes 23 and the orientation of the blades 2 is controlled so that they always face the wind direction.

[0025] Figure 2 shows a front view of the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen factory, as explained in Figure 1. In the present invention, in order to ensure a constant stable supply of power to the propulsion unit 12, electricity generated by the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen factory is stored in a storage battery system 59 (not shown) installed inside the buoyancy body 8, and the propulsion unit 12 is then driven by electricity supplied from the storage battery system 59. This allows the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen factory to remain in the same place on the sea surface 7 even in windless conditions where the blades 2 do not rotate and the generator does not generate power, by utilizing the power from the storage battery system 59. In addition, the propulsion device 12 in the present invention is composed of two 360-degree rotating pod propulsion devices 15 that can generate thrust almost evenly in all directions over 360 degrees, which are attached side by side at approximately the center of the lower part of the buoyancy body section 8. By operating and driving the rotation speed and rotation angle of the two 360-degree rotating pod propulsion devices 15 separately, it is possible to rotate the floating offshore wind farm 1 with propulsion devices and an attached hydrogen factory in the forward / backward and left / right directions, and to moor the floating offshore wind farm 1 with propulsion devices and an attached hydrogen factory in the same location on the sea surface 7.

[0026] Figure 3 shows the tower section 4, support column 6, buoyancy body section 8, and propulsion device 12 described in Figures 1 and 2 in a plan view in Figure 3a and a front view in Figure 3b. The tower section 4 is constructed of a conical reinforced concrete structure, and as shown in Figure 5, the diameter A of the upper part of the tower section is formed in a circle with a diameter of approximately 5m, the thickness B of the upper tower section slab is approximately 500mm, the height C of the tower section from the top 33 of the tower section 4 to the tower bottom 39 is approximately 97m, the thickness D of the tower bottom slab that forms the tower section base 40 of the tower section 4 is approximately 1m, the diameter S of the tower base that forms the tower section base 40 is formed in a circle with a diameter of approximately 25m, and below the tower section 4 is constructed a four-story building 5 (shown as building 1 floor 38, building 2 floor 37, building 36, and building 4 floor 35) with each floor being approximately 5m high. The buoyancy body section 8 is generally cylindrical in shape and has a hollow interior to serve as a float that floats the floating offshore wind power plant 1 with a propulsion unit and a hydrogen factory on the ocean.The buoyancy body section 8 is constructed so that the center of the top surface of the buoyancy body section 8 and the center of the tower section 4 are in a straight line. Furthermore, as shown in FIG. 5, the buoyancy body portion 8 is formed in a roughly cylindrical shape, with a buoyancy body diameter N of approximately 100 m, and a buoyancy body portion height J of approximately 10 m excluding the forward inclined portion 31 and the rear inclined portion 32 of the buoyancy body portion 8. Furthermore, as shown in FIG. 3, in front of and behind the bottom of the buoyancy body portion 8, in order to stably float the floating offshore wind power plant 1 with a propulsion unit and a hydrogen factory built on land on the water, the bottom portions in both the forward and rear directions are angled as shown by the forward inclined portion 31 (the boundary between the bottom surface and the rear inclined portion 31 is shown by the dashed line (A) 29 in FIG. 3a) and the rear inclined portion 32 (the boundary between the bottom surface and the rear inclined portion 32 is shown by the dashed line (B) 30 in FIG. 3a) toward the front and rear ends, respectively, with a forward inclined portion angle M and a rear inclined portion angle P1 shows that the tower section 4 and the buoyancy body section 8 are both inclined at an angle of approximately 14 degrees, and eight struts 6 made of steel pipes, each approximately 2 m in diameter, 30 mm in thickness, and 10 m in length, are attached at equal angles to the circumference at equal distances from the center of the top surface of the buoyancy body section 8 to connect the tower section 4 and the buoyancy body section 8. As explained in Fig. 1, multiple ballast water tanks (not shown) are installed inside the buoyancy body section 8, and by injecting or discharging seawater into the ballast water tanks, the buoyancy of the buoyancy body section 8 is adjusted so that the position of the sea level 7 described in Fig. 2 is approximately at the center of the vertical direction of the struts 6. The inclination of the floating offshore wind farm 1 with a propulsion unit and an attached hydrogen plant relative to the sea level 7 described in Fig. 2 can also be maintained horizontally by injecting or discharging seawater into the multiple ballast water tanks.

[0027] Furthermore, a cylindrical pit section 34 with a diameter of approximately 4 m was constructed, as shown by the dotted line (C) 41, extending from approximately the top 33 of the tower section 4 through the tower base 40 to approximately the bottom of the center of the buoyancy body section 8, and a staircase (not shown) for moving up and down and a simple lift (not shown) for carrying out inspection work were installed inside the pit section 34, making it possible for workers to carry out inspections efficiently.

[0028] Inside the building 5 of the tower section 4 configured in this manner, a seawater desalination system 58 for converting seawater into fresh water, a water electrolysis system 53, and a hydrogen liquefaction system 54 are installed. The water electrolysis system 53 electrolyzes the fresh water produced in the seawater desalination system 58 using electricity generated by a generator inside the nacelle 3 to generate hydrogen, and the hydrogen liquefaction system 54 liquefies the electrolyzed hydrogen. Liquid hydrogen is produced from seawater by operating the water electrolysis system 53, and the produced liquid hydrogen is passed through the vertical compartment 34 and stored in a liquid hydrogen storage tank 57 in a cold box installed inside the buoyancy body section 8. This configuration makes it possible to liquefy the hydrogen produced by electrolysis to approximately 1 / 800 of its volume, allowing for efficient storage. The liquid hydrogen produced in this manner is loaded onto a liquefied hydrogen carrier for transportation.

[0029] Figure 4 shows the support columns 6 and buoyancy body section 8 described in Figures 1 and 2 in a plan view in Figure 4a and a front view in Figure 4b. The eight support columns 6 are all formed from cylindrical steel pipes with a diameter of approximately 2 m, a wall thickness of 30 mm, and a length of 10 m. As shown in the plan view in Figure 4a, the eight support columns (A) 45, (B) 46, (C) 47, (D) 48, (E) 49, (F) 50, (G) 51, and (H) 52 are arranged radially at 45-degree intervals when viewed in a horizontal plane on a circumference with a radius of approximately 1050 cm from the center of the top surface of the buoyancy body section 6. The eight columns (A) 45, (B) 46, (C) 47, (D) 48, (E) 49, (F) 50, (G) 51, and (H) 52 are attached to the tower base 40 at positions where the center of the underside of the tower bottom 39 described in Figure 3 and the center of the buoyancy body 8 are aligned in a straight line. The reason for connecting the tower 4 and the buoyancy body 8 with eight columns (6) in this way is that by supporting the tower 4 with the cylindrical, round columns (6) with a diameter of approximately 2 m, resistance from swells on the sea surface can be minimized, the swaying of the floating offshore wind farm with propulsion units and the hydrogen plant attached 1 can be suppressed, and the blades can be faced against the wind.

[0030] Figure 5 shows, with symbols A to S, the dimensions and angles of the tower section 4, support columns 6, and buoyancy body section 8 components described in Figures 1 and 2. The tower section 4 is conical, with the top section 33 formed by a circular plane, and the diameter A of the tower section upper part at the top section 33 is formed as a circle with a diameter of approximately 5 m, and the thickness B of the tower section upper part at the top section 33 is formed as a circle with a diameter of approximately 500 mm, and further, as shown by the dashed dotted line (C) 41, the pit section 34 is formed as a cylinder with a diameter of approximately 4 m from approximately the upper end of the tower section 33 through the tower section base 40 to approximately the lower end of the buoyancy body section 8, with an internal height of approximately 116.3 m. Furthermore, the tower height C from the top 33 of the tower section 4 to the tower bottom 39 is approximately 97m, and the four-story building 5 has a fourth-floor height F of approximately 5m, a third-floor height G of approximately 5m, a second-floor height H of approximately 5m, and a first-floor height I of approximately 5m. The tower bottom slab thickness D at the bottom of the tower section 4 is approximately 1m, and the tower base diameter T at the bottom of the tower section 4 is cylindrical and has a diameter of approximately 25m. Furthermore, the height E of the eight pillars 6 is approximately 10m. Furthermore, the reinforced concrete thickness of the buoyancy body section 8, which is constructed with a hollow interior and has a reinforced concrete structure, is approximately 200mm at the top, bottom, and outer periphery. Furthermore, a hole with a diameter of approximately 4m is formed in the center of the top of the buoyancy body section 8 to allow the vertical section 34 to pass through. Furthermore, the front and rear bottoms of the buoyancy body section 8 are formed in a shape that is inclined in the forward and rearward directions, and the buoyancy body section diameter N of the buoyancy body section 8 is formed in a cylindrical shape with a diameter of approximately 100 m, and the buoyancy body section height J excluding the forward inclined section 31 and the rear inclined section 32 of the buoyancy body section 8 described in Figure 3 is formed to be approximately 10 m, and the forward inclined section tip height K and the rear inclined section rear end height R of the tip of both the forward inclined section 31 and the rear inclined section 32 in the forward and rearward directions of the buoyancy body section 8 described in Figure 3 are both formed to be approximately 3 m, and the forward inclined section angle M and the rear inclined section angle P of the forward inclined section 31 and the rear inclined section 32 described in Figure 3 are both formed to be approximately 14 degrees, and the forward inclined section maximum width L of the forward inclined section 31 described in Figure 3 and, similarly, the rear inclined section maximum width Q of the rear inclined section 32 are both formed to be approximately 12 m. Example 2

[0031] A second embodiment of the present invention will now be described. [Embodiment 2 of the Invention]

[0032] 6 shows a second embodiment of the present invention. In the first embodiment of the present invention, the propulsion devices 12 are two 360-degree rotating pod propulsion devices 15 mounted side by side approximately at the center of the lower part of the buoyancy body 8. In contrast, in the second embodiment of the present invention, two propulsion devices 69 (specifically, 360-degree rotating pod propulsion devices 70) are arranged in parallel and mounted approximately at the rear end of the buoyancy body 66. By changing and controlling the rotation speed and rotation angle of the two propulsion devices 69 (specifically, 360-degree rotating pod propulsion devices 70), the floating offshore wind farm 1 equipped with propulsion devices and equipped with a hydrogen factory of the present invention can be moored in the same location offshore. The remaining structure is the same as that of the first embodiment of the present invention.

[0033] The above has provided a detailed explanation of the floating offshore wind farm with a propulsion unit and a hydrogen plant according to the present invention based on the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention without departing from the spirit of the invention.

[0034] In Figure 1, it has been explained that the support pillar 6 is formed from a steel pipe with a diameter of approximately 2 m, a thickness of approximately 30 mm, and a length of approximately 10 m. However, it is of course also possible to form the support pillar 6 from a cylindrical reinforced concrete structure with a diameter of approximately 2 m, a thickness of approximately 20 cm, and a length of approximately 10 m. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a perspective view showing a floating offshore wind farm equipped with a propulsion unit and equipped with a hydrogen factory according to a first embodiment of the present invention. [Figure 2] 2 is a front view of the floating offshore wind power plant with a propulsion unit and the hydrogen plant shown in FIG. 1 according to the embodiment. [Figure 3] 2A and 2B are plan and front views of a tower section, a support column, a buoyancy body section, and a propulsion device according to the embodiment. [Figure 4] 2A and 2B are plan and front views of a support column, a buoyancy body, and a propulsion device according to the embodiment. [Figure 5] FIG. 2 is a front view of the tower section, the support column, the buoyancy body section, and the propulsion device according to the embodiment. [Figure 6] 10 is a front view showing a state in which a propulsion device is attached to the rear end of a buoyant body according to a second embodiment of the present invention. FIG. [Explanation of symbols]

[0036] A Tower top diameter B. Thickness of the upper slab of the tower C Tower height D Tower bottom slab thickness E Pillar height F Building 4th floor height G Building 3rd floor height H: 2nd floor height I Building 1st floor height J Buoyancy body height K Height of tip of forward inclined part L Maximum width of front slope M Front slope angle N Buoyant body diameter P Back slope angle Q Maximum width of rear slope R Rear end height of rear inclined part S Tower base diameter 1. Floating offshore wind power plant with propulsion unit and hydrogen plant 2 blades 3 Nacelle 4 Tower section 5 Building 6 pillars 7 sea level 8 Buoyant body 9 Undersea 10. Hub 11 Steel pipe 12 Propulsion device 13 Screw propeller 15 360-degree rotating pod propulsion unit 29 Dot-dashed line (A) 30 Dashed line (B) 31 Front slope 32 Rear slope 33 Top 34 Pit Plot 35 Building 4th floor 36 Building 3rd floor 37 Building 2nd floor 38 Building 1st floor 39 Tower Bottom 40 Tower base 41 Dot-dashed line (C) 45 Support (A) 46 Pillar (B) 47 Pillar (C) 48 Pillar (D) 49 Pillar (E) 50 Pillar (F) 51 Pillar (G) 52 Pillar (H) 53 Water electrolysis equipment 54 Hydrogen liquefaction equipment 55 Dot-dashed line (E) 56 Dot-dashed line (D) 57 Liquid hydrogen storage tank 58 Seawater desalination equipment 59 Battery storage equipment 60 Tower section 61 Top 62 dash-dotted line 63 Pit Pit 64 Building 65 Pillar 66 Buoyant body part 67 Screw propeller 68 Rudder 69 Propulsion device 70 360-degree rotating pod propulsion unit

Claims

[Claim 1] In a floating offshore wind power plant, which consists of a tower supporting a nacelle that houses multiple blades, a gearbox, and a generator, The tower section (4) to be placed offshore is constructed of a conical reinforced concrete structure, the top (33) is formed as a flat circle, the diameter (A) of the tower section top is formed as a circle with a diameter of 5m, the tower section top slab thickness (B) is 500mm, the tower section height (C) from the top (33) of the tower section (4) to the tower bottom (39) is 97m, the tower bottom slab thickness (D) constituting the tower section base (40) of the tower section (4) is 1m, the tower base diameter (S) constituting the tower section base (40) is formed as a circle with a diameter of 25m, and a four-story building (5) is constructed at the bottom of the tower section (4) with each floor being 5m high; The buoyancy body (8) to be placed underwater is cylindrical and constructed of a reinforced concrete structure, with a buoyancy body diameter (N) of 100 m and a buoyancy body height (J) of 10 m excluding the forward inclined portion (31) and the rear inclined portion (32) of the buoyancy body (8). In order to stably float on the water a floating offshore wind power plant (1) with a propulsion device and a hydrogen factory constructed on land at the front and rear of the bottom of the buoyancy body (8), the bottoms in both the forward and rear directions are formed with an inclination angle of 14 degrees toward the front and rear ends, as shown by the forward inclined portion angle (M) and the rear inclined portion angle (P). A plurality of ballast water tanks are installed inside the buoyancy body (8), and seawater is injected into or discharged from the ballast water tanks. The buoyancy of the buoyancy body (8) is adjusted so that the position of the sea surface (7) is approximately centered vertically between the support (6) and the propulsion unit, and the inclination of the floating offshore wind power plant (1) with a propulsion unit and an attached hydrogen plant relative to the sea surface (7) is maintained horizontal by injecting or discharging seawater into a plurality of ballast water tanks. Furthermore, the buoyancy body (8) is constructed with a hollow interior and has a reinforced concrete structure, and the thickness of the reinforced concrete is 200 mm at the top, bottom, and outer periphery. Furthermore, a hole with a diameter of 4 m is formed in the center of the top of the buoyancy body (8) to pass a vertical section (34). In order to connect the tower section (4) and the buoyancy section (8), eight supports (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), (H) ... and a support (6) in which the upper portions of eight supports (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52) are attached to the underside of the tower base (40) such that the center of the underside of the tower bottom (39) and the center of the buoyancy body (8) are aligned in a straight line; a cylindrical pit section (34) having a diameter of approximately 4 m, extending from approximately the top (33) of the tower section (4) through the tower section base (40) to approximately the bottom of the center of the buoyancy body section (8) as shown by the dashed line (C) (41); In order to ensure a constant supply of stable power to the propulsion device (12), electricity generated by the generator inside the nacelle (3) is stored in a battery system (59) installed inside the buoyancy body (8), and then the electricity is used to drive the propulsion device (12).By utilizing the power of the battery system (59) even in windless conditions where the blades (2) do not rotate and the generator does not generate power, the floating offshore wind power plant (1) with a propulsion device and a hydrogen plant can be kept in the same place on the ocean. The propulsion device (12) is configured so that two 360-degree swivel pod propulsion devices (15) capable of generating thrust almost uniformly in all directions of 360 degrees are attached side by side at approximately the center lower part of the buoyancy body part (8), and the rotation speed and rotation angle of the two 360-degree swivel pod propulsion devices (15) can be operated and driven separately, thereby turning the floating offshore wind farm (1) with propulsion devices and equipped with a hydrogen factory in the forward, backward, left and right directions, and mooring the floating offshore wind farm (1) with propulsion devices and equipped with a hydrogen factory in the same place on the ocean; A floating offshore wind power plant with a propulsion unit and an attached hydrogen factory is configured such that a seawater desalination unit (58), a water electrolysis unit (53), and a hydrogen liquefaction unit (54) are installed inside a building (5) of a tower unit (4), and the seawater desalination unit (58) for converting seawater into fresh water using electricity generated by a wind power generation unit, the water electrolysis unit (53) for generating hydrogen by electrolysis of fresh water, and the hydrogen liquefaction unit (54) for liquefying the electrolyzed hydrogen are operated to produce liquid hydrogen from seawater, and the produced liquid hydrogen is passed through a vertical compartment (34) and stored in a liquid hydrogen storage tank (57) in a cold box installed inside a buoyancy body unit (8).

Images