Floating offshore wind power plant with hydrogen plant

Abstract

To significantly shorten the number of days for construction and to provide a water electrolysis device for generating hydrogen by carrying out electrolysis on sea water with electrical output obtained at a floating body type offshore wind power station as a power source inside the floating body type offshore wind power station, and the floating body type offshore wind power station installed with a storage facility for the generated hydrogen.SOLUTION: A construction period is significantly shortened by building a facility for constructing a floating body type offshore wind power station on a coast near the ocean where the floating type offshore wind power station is to be installed, constructing the floating type offshore wind power station by making use of technology cultivated by construction work for a skyscraper etc., floating the floating body type offshore wind power station assembled on land on water, and having a tugboat (tow boat) tow to site, and thereby an effective construction method on land is provided, as well as there are provided a water electrolysis device for generating hydrogen by carrying out electrolysis on sea water with the power generated by the floating body type offshore wind power station as a power source inside the floating body type offshore wind power station, and the floating body type offshore wind power station installed with a hydrogen storage facility for storing the generated hydrogen.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a floating offshore wind power plant with a reinforced concrete structure that is equipped with a water electrolysis device and a liquid hydrogen storage facility. [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 turbines currently in use is similar to that of those operating on land, and because there are fewer constraints on installing wind turbines offshore than on land, it is expected that more will be installed offshore in the future.

[0003] Currently, fixed-bottom wind turbines, which are popular in Europe and other regions, have columns that reach the seabed, and are suitable for relatively shallow waters up to about 50 meters deep. However, in Japan, the area of ​​the continental shelf with relatively shallow waters is small, so the country is currently transitioning to floating turbines, in which wind turbines are 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 float placed underwater and a tower erected on the float, with a wind turbine consisting of a nacelle and blades attached to the top of the tower. Currently, there are four main types of floating offshore wind technologies: spar type, semi-submersible type, barge type, and TLP type.

[0005] Currently, there is a demand for greater output per facility, which requires longer blades to increase the wind-receiving surface area of ​​the wind turbine body. Large offshore wind turbines with blades longer than 80 meters are now being put into practical use.

[0006] Conventionally, to install a floating offshore wind power generation device in a designated sea area, the float was towed to the installation area by a barge or similar vessel and moored there, and then the superstructure was moved to the top of the float by a crane or similar vessel, and the float and superstructure were connected.

[0007] In recent years, attention has been focused on "green hydrogen," a renewable energy source produced by electrolyzing water using electricity generated by solar or wind power to separate it into hydrogen and oxygen. Currently, electricity generated by offshore wind power generation facilities is sent to hydrogen production plants via submarine power transmission cables laid on the seabed, and hydrogen is produced from water using water electrolysis equipment. This requires the construction of new power transmission facilities on the seabed, which requires large-scale construction work and enormous installation costs, preventing widespread use of this technology. Summary of the Invention [Problem to be solved by the invention]

[0008] However, the sea areas where floating offshore wind turbines 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 turbines must be carried out under harsh oceanographic conditions only when the oceanographic conditions are relatively calm, which poses a problem of limitations on the timing and duration of installation work.

[0009] Furthermore, the installation of floating offshore wind turbines requires delicate work using large work vessels, which increases construction costs.

[0010] Furthermore, in order to produce "green hydrogen" using electricity generated by floating offshore wind turbines, there was also the problem that an undersea power transmission cable would have to be laid on the seabed to transmit the electricity to the hydrogen production plant.

[0011] In light of the current situation described above, the present invention aims to construct facilities for building a floating offshore wind farm on a coast close to the sea where the floating offshore wind farm will be installed, construct the floating offshore wind farm using technology cultivated in the construction of skyscrapers and the like, and then assemble the floating offshore wind farm on land, float it on the water, and tow it to the site by tugboat, thereby significantly shortening the number of construction days and providing an efficient construction method on land.In addition, in order to efficiently produce green hydrogen, an object of the present invention is to install a water electrolysis device inside the floating offshore wind farm to produce hydrogen by electrolyzing seawater using electricity generated by the floating offshore wind farm as a power source, and a liquid hydrogen storage facility to store the produced hydrogen. [Means for solving the problem]

[0012] In order to solve this problem, the invention described in claim 1 is a rotor comprising a plurality of blades and a speed increaser. 、 A floating offshore wind turbine consisting of a tower supporting a nacelle with a built-in generator place Deployed offshore in do Tower section (4) is constructed as a conical reinforced concrete structure, its top (33) is formed with a circular plane, a steel pipe (23) for attaching a nacelle is attached to the top (33), the diameter (A) of the tower section upper part of the top (33) is formed with a diameter of 5m, further, the thickness (B) of the tower section upper slab of the top (33) is formed with 500mm, further, the height (C) of the tower section from the top (33) of the tower section (4) to the tower bottom (39) is formed with 97m, the lower part of the tower section (4) is composed of a four-story building (5) formed with a height of each floor of 5m, further, the thickness (D) of the tower bottom slab at the bottom of the tower section (4) is formed with 1m, and the diameter (S) of the tower base of the lower part of the tower section (4) is formed with a circle with a diameter of 25m. Placed underwater do buoyant body part (8) is cylindrical and made of reinforced concrete. The interior is hollow to serve as a float that floats a floating offshore wind power plant (1) with an attached factory on the ocean, and the thickness of the outer skin of the reinforced concrete outer surface and upper and lower surfaces of the buoyancy body section (8) is 200 mm for all of the upper, lower and outer surfaces. Furthermore, the front and rear bottom of the buoyancy body section (8) is formed in a shape that is inclined in the forward and rear directions. Furthermore, the buoyancy body section diameter (N) of the buoyancy body section (8) is formed in a circular shape with a diameter of 100 m. Furthermore, the buoyancy body section height (J) of the buoyancy body section (8) is formed in a 10 m. Furthermore, the forward inclined section (31) and the rear inclined section (32) in the forward and rear directions of the buoyancy body section (8) are formed in a circular shape with a diameter of 100 m. The height (K) of the tip of the forward inclined portion of the forward inclined portion (32) and the height (R) of the rear end of the rear inclined portion are both 3m, and the forward inclined portion angle (M) and the rear inclined portion angle (P) of the forward inclined portion (31) and the rear inclined portion (32) are both 14 degrees, and the maximum width (L) of the forward inclined portion of the forward inclined portion (31) and the maximum width (Q) of the rear inclined portion of the rear inclined portion (32) are both 12m, and six mooring wires (A) (11), (B) (12), (C) (13), (D) (14), (E) (15), (F) (16) are attached to the side of the buoyancy body portion (8). In order to guide the mooring wires (A) (25), (B) (26), (C) (27), (D) (28), (E) (29), and (F) (30) at fixed positions on the side of the buoyancy body (8), the buoyancy body (8) is formed with six mooring wire guide holes (A) (25), (B) (26), (C) (27), (D) (28), (E) (29), and (F) (30) in a roughly semi-cylindrical shape with a radius of 30 cm, and the mooring wire guide holes are positioned radially every 60 degrees from the center when viewed horizontally on the top surface of the buoyancy body (8), and the sea surface (7) In order to minimize the resistance caused by waves and to suppress the swaying of the floating offshore wind power plant (1) which also houses a hydrogen plant, the eight pillars (6) connecting the tower section (4) and the buoyancy section (8) are all made of cylindrical steel pipes with a diameter of 2m, a thickness of 30mm and a length of 10m. They are arranged on a circumference of a radius of 1050cm from the center of the top surface of the buoyancy section (8), radially extending at 45 degrees from the center when viewed horizontally. These pillars are: (A)(45), (B)(46), (C)(47), (D)(48), (E)(49), (F)(50), (G)(51),The tower section (4) is attached vertically so that the center of the support column (H) (52) is positioned, and the upper parts of the eight support columns (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 bottom (39). A cylindrical vertical section (34) with a diameter of 4 m extends from approximately the top (33) of the tower section (4) through the tower bottom (39) to approximately the bottom of the center of the buoyancy body section (8). A floating offshore wind power plant (1) with a hydrogen plant attached is moored to the seabed (9) in a TLP type. To this end, six mooring wires (A)(11), (B)(12), (C)(13), (D)(14), (E)(15), and (F)(16) were attached to the six seabed foundation piles (A)(17), (B)(18), (C)(19), (D)(20), (E)(21), and (F)(22) installed on the seabed (9), and the six mooring wires (A)(11), (B)(12), (C)(13), (D)(14), (E)(15), and (F)(16) were arranged so that the sea surface (7) was approximately in the center of the vertical direction of the support (6). Wire winding and unwinding machines (60) for winding and unwinding the mooring wires (3), (D) (14), (E) (15), and (F) (16) are evenly distributed around the circumference of the pit section (34) inside the first floor (38) of the building, and one end of the mooring wires is passed through a guide hole for the mooring wire formed on the side of the buoyancy body section (8) and pulled into the building of the tower section (4) via a wire pulley. The lengths of the mooring wires are individually adjusted and the buoyancy body section (8) is forcibly submerged to keep it horizontal to the sea surface (7), thereby preventing the floating offshore wind power plant (1) with the hydrogen factory attached from swaying vertically and horizontally relative to the sea surface (7). A wire winding and unwinding machine (60) is configured to minimize the strain and maintain a horizontal state, and a seawater desalination plant (58) for converting seawater into fresh water is installed inside the building (5) of the tower section (4) configured in this way. A water electrolysis device (53) is installed inside the building (5) of the tower section (4) to electrolyze the fresh water produced by the seawater desalination plant (58) with electricity generated by a power generation device inside the nacelle to generate hydrogen, and a hydrogen liquefaction device (54) is installed and 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 (55) in a cold box installed inside the buoyancy body section (8). It is characterized by the fact that [Effects of the Invention]

[0018] According to the invention of claim 1, a plurality of blades and a speed increaser 、 A floating offshore wind turbine consisting of a tower supporting a nacelle with a built-in generator place Deployed offshore in do Tower section (4) is constructed as a conical reinforced concrete structure, its top (33) is formed with a circular plane, a steel pipe (23) for attaching a nacelle is attached to the top (33), the diameter (A) of the tower section upper part of the top (33) is formed with a diameter of 5m, further, the thickness (B) of the tower section upper slab of the top (33) is formed with 500mm, further, the height (C) of the tower section from the top (33) of the tower section (4) to the tower bottom (39) is formed with 97m, the lower part of the tower section (4) is composed of a four-story building (5) formed with a height of each floor of 5m, further, the thickness (D) of the tower bottom slab at the bottom of the tower section (4) is formed with 1m, and the diameter (S) of the tower base of the lower part of the tower section (4) is formed with a circle with a diameter of 25m. Placed underwater do buoyant body part (8) is cylindrical and constructed with a reinforced concrete structure, and is hollow inside to serve as a float that will float the floating offshore wind power plant (1) equipped with a hydrogen plant on the ocean. The thickness of the outer surface and upper and lower surfaces of the reinforced concrete of the buoyancy body (8) is 200 mm for all of the upper, lower and outer surfaces. Furthermore, the front and rear bottoms of the buoyancy body (8) are formed in a shape that is inclined forward and backward. Furthermore, the diameter (N) of the buoyancy body (8) is formed in a circular shape with a diameter of 100 m. Furthermore, the buoyancy body section height (J) of the buoyancy body section (8) is formed at 10 m, and the forward inclined section tip height (K) and the rear end height (R) of the rear inclined section of the forward and rearward inclined sections (31) and (32) of the buoyancy body section (8) are both formed at 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) are both formed at 14 degrees, and the forward inclined section maximum width (L) of the forward inclined section (31) and the rear inclined section maximum width (Q) of the rear inclined section (32) are both formed at 1 The buoyancy body (8) is formed with a length of 2 m, and on the side of the buoyancy body (8) are six mooring wire guide holes (A) (25), (B) (26), (C) (27) formed in a roughly semi-cylindrical shape with a radius of 30 cm to guide the six mooring wires (A) (11), (B) (12), (C) (13), (D) (14), (E) (15), and (F) (16) in fixed positions on the side of the buoyancy body (8). The buoyancy body (8) has mooring wire guide holes (D) (28), mooring wire guide holes (E) (29), and mooring wire guide holes (F) (30) formed at positions extending radially at 60 degrees from the center when viewed horizontally on the top surface of the buoyancy body (8). In order to minimize resistance caused by waves on the sea surface (7) and to suppress the swaying of the floating offshore wind power plant (1) which also houses a hydrogen factory, the eight pillars (6) for connecting the tower part (4) and the buoyancy body (8) are each 2 m in diameter, 30 mm in thickness, and 30 mm in length. The buoyancy body (8) is made of a cylindrical steel pipe with a length of 10m, and is attached vertically so that the centers of eight supports (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52) are located at positions extending radially from the center of the circle with a radius of 1050cm from the center of the top surface of the buoyancy body (8) at 45-degree intervals when viewed in a horizontal plane. The upper parts of the support columns (6) attached to the underside of the tower bottom (39) are the support columns (F) (50), support columns (G) (51), and support columns (H) (52). The vertical section (34) is a cylindrical section with a diameter of 4m that runs from roughly the top (33) of the tower section (4) through the tower bottom (39) to roughly the bottom of the center of the buoyancy body section (8). The six seabed foundation piles (A) (17), seabed foundation piles (B) (18), seabed foundation piles (C) (19), seabed foundation piles (D) (20), and seabed foundation piles (C) (21) are installed on the seabed (9) in a TLP type mooring manner. Six mooring wires (A)(11), (B)(12), (C)(13), (D)(14), (E)(15), and (F)(16) are attached to the foundation pile (E)(21) and the seabed foundation pile (F)(22), respectively, and the six mooring wires (A)(11), (B)(12), (C)(13), (D)(14), (E)(15), and (F)(16) are individually attached so that the sea surface (7) is approximately at the center of the top and bottom of the support (6). The wire winding and unwinding machines (60) for winding and unwinding are evenly distributed around the circumference near the side of the vertical section (34) inside the first floor (38) of the building, and one end of the mooring wire that passes through the mooring wire guide hole formed on the side of the buoyancy body section (8) is pulled into the building of the tower section (4) via a wire pulley. The length of the mooring wire is individually adjusted and the buoyancy body section (8) is forcibly submerged to keep it horizontal with respect to the sea surface (7), so that the floating offshore wind power plant (1) with the attached hydrogen factory does not sway vertically with respect to the sea surface (7),A wire winding and unwinding machine (60) is configured to minimize lateral shaking and maintain a horizontal state. Inside the building (5) of the tower section (4) configured in this manner, a seawater desalination plant (58) for converting seawater into fresh water is installed. A water electrolysis plant (53) is installed to electrolyze the fresh water produced by the seawater desalination plant (58) using electricity generated by a power generation device inside the nacelle to generate hydrogen. A hydrogen liquefaction plant (54) is also installed and operated to produce liquid hydrogen from seawater. The produced liquid hydrogen is then passed through a vertical section (34) and stored in a liquid hydrogen storage tank (55) in a cold box installed inside the buoyancy body section (8). This has made it possible to utilize technology cultivated on construction sites for skyscrapers and other buildings, significantly shortening the number of days required for construction, and also to use the electrical output generated by the floating offshore wind farm as a power source to electrolyze seawater and directly generate hydrogen. [Example]

[0024] Hereinafter, an embodiment of the present invention will be described. DETAILED DESCRIPTION OF THE INVENTION

[0025] 1 to 7 show an embodiment of the present invention.

[0026] Figure 1 shows a perspective view of a floating offshore wind farm 1 with an attached hydrogen plant of the present invention, installed offshore. The floating offshore wind farm 1 with an attached hydrogen plant is composed of three blades 2 attached to a hub 10, a gearbox, generator, yaw control device, etc. installed inside a nacelle 3, steel pipes 23 for securing the nacelle 3 to a tower 4, the tower 4 constructed of reinforced concrete, eight steel pipe struts 6 with a diameter of approximately 2 m, a thickness of approximately 30 mm, and a length of approximately 10 m for connecting the tower 4 to a buoyancy body 8, and the buoyancy body 8, which is a hollow reinforced concrete structure that serves as the floating structure and allows the floating offshore wind farm 1 with an attached hydrogen plant to float on the ocean and support itself. The buoyancy body 8 configured in this manner is moored to the seabed 9 in a TLP type manner to minimize the amount of rocking of the buoyancy body 8 as configured above, and is composed of six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16, and six seabed foundation piles (A) 17, seabed foundation pile (B) 18, seabed foundation pile (C) 19, seabed foundation pile (D) 20, seabed foundation pile (E) 21, and seabed foundation pile (F) 22 fixed to the seabed 9 to secure the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 to the seabed 9. Since the nacelle 3 attached to the steel pipe 23 must always allow the blades 2 to follow the direction of the wind, a yaw control device (not shown) is attached inside the nacelle 3 so that it can rotate freely 360 degrees relative to the steel pipe 23.

[0027] Figure 2 shows a front view of the floating offshore wind farm 1 with the hydrogen plant described in Figure 1. In the present invention, in order to moor the floating offshore wind farm 1 with the hydrogen plant to the seabed 9 in a TLP type, six mooring wires (A) 11, (B) 12, (C) 13, (D) 14, (E) 15, and (F) 16 are attached to six seabed foundation piles (A) 17, (B) 18, (C) 19, (D) 20, (E) 21, and (F) 22 installed on the seabed 9, respectively, and the sea surface 7 is positioned approximately at the center of the top and bottom of the support columns 6. By individually adjusting the lengths of the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 so that the buoyancy body 8 is in a horizontal position relative to the sea surface 7 and forcing it to submerge, the floating offshore wind farm 1, which also houses a hydrogen factory, can be kept horizontal by minimizing pitch and roll relative to the sea surface 7, and it has become possible to rotate the blades 2 in a stable state against the wind.

[0028] Figure 3 shows the tower section 4, support column 6, and buoyancy body section 8 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, with the top section 33 formed in a circle with a diameter of approximately 5m as shown by the tower section top diameter A in Figure 6, the tower section top slab thickness B is approximately 500mm, the tower section height C from the top section 33 of the tower section 4 to the tower bottom 39 is approximately 97m, the tower bottom slab thickness D constituting the tower section base 40 of the tower section 4 is approximately 1m, the tower base diameter S constituting the tower section base 40 is circular and has 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 8 is cylindrical and hollow inside to function as a float. As shown in FIG. 6, the buoyancy body diameter N of the buoyancy body 8 is approximately 100 m, and the buoyancy body height J is approximately 10 m. Furthermore, as shown in FIG. 3, in order to launch the floating offshore wind farm 1, which is equipped with a hydrogen plant constructed on land, in a stable state in front of and behind the bottom of the buoyancy body 8, the bottom in both the forward and rearward directions is angled toward the front and rear ends as shown by the forward slope 31 (the boundary between the bottom and the forward slope 31 is shown by the dashed line (A) 41 in FIG. 3a) and the rear slope 32 (the boundary between the bottom and the rear slope 32 is shown by the dashed line (B) 42 in FIG. 3a), and the forward slope angle M and the rear slope angle J in FIG. 6 are angled toward the front and rear ends as shown by the forward slope angle M and the rear slope angle J in FIG. P As shown in the figure, both tower section 4 and buoyancy section 8 are formed in a shape inclined at an angle of approximately 14 degrees, and in order to connect tower section 4 and buoyancy section 8, eight supports 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 are attached around the center of the top surface of buoyancy section 8 at positions on a circle extending radially from the center at 45 degree intervals when viewed on a horizontal plane.

[0029] Furthermore, on the side of the buoyancy body section 8, six mooring wire guide holes (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, mooring wire guide hole (F) 30 are formed, each roughly semi-cylindrical (semi-cylindrical) with a radius of approximately 30 cm, in order to guide the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 described in Figures 1 and 2 in fixed positions on the side of the buoyancy body section 8.

[0030] Furthermore, a cylindrical pit section 34 with a diameter of approximately 4 m was constructed, as shown by the dotted line (C) 43, extending from approximately the top 33 of the tower section 4 through the tower bottom 39 to approximately the bottom of the center of the buoyancy body section 8, and by installing a staircase (not shown) for moving up and down and a simple lift (not shown) for carrying out inspection work inside the pit section 34, it has become possible to improve work efficiency.

[0031] Inside the building 5 of the tower section 4 configured in this manner, a seawater desalination plant 58 for converting seawater into fresh water is installed. A water electrolysis plant 53 is installed inside the nacelle 3 to electrolyze the fresh water produced by the seawater desalination plant 58 to generate hydrogen using electricity generated by a power generation unit inside the nacelle 3. A hydrogen liquefaction plant 54 is also installed and operated to liquefy the electrolyzed hydrogen. This allows for the production of liquid hydrogen from seawater, and the produced liquid hydrogen is then passed through the vertical compartment 34 and stored in a liquid hydrogen storage tank 55 in a cold box installed inside the buoyancy body section 8. This configuration allows for the hydrogen produced by electrolysis to be liquefied to approximately 1 / 800 of its original volume, enabling efficient storage. The liquid hydrogen produced in this manner is loaded onto a liquefied hydrogen carrier for transportation.

[0032] FIG. 4 shows the support column 6 and buoyancy body section 8 described in FIGS. 1 and 2 in a plan view in FIG. 4a and a front view in FIG. 4b. The six mooring wire guide holes (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, and mooring wire guide hole (F) 30 formed on the outer periphery of the buoyancy body section 8 are formed at positions extending radially from the center at 60-degree intervals when viewed horizontally with respect to the top surface of the buoyancy body section 8, and the mooring wire guide holes (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, and mooring wire guide hole (F) 30 are all formed in an approximately semi-cylindrical (semi-cylindrical) shape with a radius of approximately 30 cm.

[0033] Furthermore, the eight pillars 6 for connecting the tower section 4 and the buoyancy body section 8 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, and are installed vertically so that the centers of the eight pillars (A) 45, pillar (B) 46, pillar (C) 47, pillar (D) 48, pillar (E) 49, pillar (F) 50, pillar (G) 51, and pillar (H) 52 are located at positions extending radially from the center at 45-degree intervals from the center on a circumference with a radius of approximately 1050 cm from the center of the top surface of the buoyancy body section 8 when viewed in a horizontal plane, and the upper parts of the eight pillars (A) 45, pillar (B) 46, pillar (C) 47, pillar (D) 48, pillar (E) 49, pillar (F) 50, pillar (G) 51, and pillar (H) 52 are installed on the underside of the tower bottom section 39 described in Figure 3. The reason for connecting the tower section 4 and the buoyancy body section 8 with eight supports 6 in this way is that by supporting the tower section 4 with round cylindrical supports with a diameter of approximately 2 m, resistance from waves on the sea surface 7 as described in Figure 2 is minimized, the swaying of the floating offshore wind farm 1 which also houses a hydrogen factory is suppressed, and the blades are positioned in the direction from which the wind is blowing.

[0034] Figure 5 shows six mooring wires (A) 11, (B) 12, (C) 13, (D) 14, (E) 15, and (F) 16 for mooring the buoyant body section 8 described in Figures 1 and 2 to the seabed 9, in a plan view in Figure 5a and a front view in Figure 5b. The six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 are positioned through six mooring wire guide holes (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, and mooring wire guide hole (F) 30 formed on the side of the buoyancy body 8, and the length of each mooring wire is adjusted using the wire winding and letting-out machine 60 shown in Figure 7 so that the buoyancy body 8 is horizontal to the sea surface 7.This makes it easy for the floating offshore wind power plant 1, which also has a hydrogen factory, to be kept horizontal to the sea surface 7. The positional relationship between the six mooring wire guide holes (A) 25, mooring wire guide holes (B) 26, mooring wire guide holes (C) 27, mooring wire guide holes (D) 28, mooring wire guide holes (E) 29, and mooring wire guide holes (F) 30 and the six seabed foundation piles (A) 17, seabed foundation piles (B) 18, seabed foundation piles (C) 19, seabed foundation piles (D) 20, seabed foundation piles (E) 21, and seabed foundation piles (F) 22 is such that the six mooring wires are positioned in a manner that minimizes the amount of shaking of the buoyancy body 8 due to ocean currents and waves. By fixing six seabed foundation piles (A) 17, seabed foundation piles (B) 18, seabed foundation piles (C) 19, seabed foundation piles (D) 20, seabed foundation piles (E) 21, and seabed foundation piles (F) 22 to the seabed 9 directly below mooring wire guide hole (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, and mooring wire guide hole (F) 30, it has become possible to reduce the area occupied below sea level, which is one of the characteristics of the TLP type.

[0035] Figure 6 shows the dimensions and angles of the tower section 4, support columns 6, and buoyancy body section 8 components described in Figures 1 and 2, using symbols A to S. The tower section 4 is conical, and the top section 33 is formed with a circular plane, with the diameter A of the top section of the tower section at the top section 33 being approximately 5 m, and the thickness B of the top section of the tower section at the top section 33 being approximately 500 mm, and the pit section 34 is formed in the shape of a cylinder with a diameter of approximately 4 m, extending from approximately the top end of the tower section 33 through the tower section base 40 to approximately the bottom end of the buoyancy body section 8, as shown by the dashed dotted line (C) 43. Furthermore, the tower height C from the top 33 of the tower section 4 to the tower bottom 39 is approximately 97 m, and the four-story building 5 has a fourth floor height F of approximately 5 m, a third floor height G of approximately 5 m, a second floor height H of approximately 5 m, and a first floor height I of approximately 5 m. Furthermore, the tower bottom slab thickness D at the bottom of the tower section 4 is approximately 1 m, and the tower base diameter S at the bottom of the tower section 4 is formed in a circular shape with a diameter of approximately 25 m. Furthermore, the support height E of the eight pillars 6 is approximately 10 m, and the thickness of the reinforced concrete of the buoyancy body 8 is approximately 200 mm at the top, bottom, and outer periphery. Furthermore, the front and rear bottom of the buoyancy body 8 constructed with a reinforced concrete structure is formed in a shape that is inclined toward the front and rear. Furthermore, the buoyancy body diameter N of the buoyancy body 8 is formed in a circular shape with a diameter of approximately 100 m, and the buoyancy body height J of the buoyancy body 8 is formed in a The forward slope tip height K and the rear end height R of the rearward slope of the forward slope 31 and rear slope 32 are both approximately 3 m, the forward slope angle M and rear slope angle P of the forward slope 31 and rear slope 32 described in Figure 3 are both approximately 14 degrees, the forward slope maximum width L of the forward slope 31 and the rear slope maximum width Q of the rear slope 32 are both approximately 12 m, and the bottom slab thickness O of the buoyancy body at the bottom of the pit section 34 is approximately 200 mm. By constructing the center of the tower section 4, the centers of the eight struts 6, and the center of the buoyancy body 8 in this way, the floating offshore wind farm 1 with an attached hydrogen plant can be maintained in a balanced and horizontal position relative to the sea surface 7.

[0036] Figure 7 shows a partial cross-sectional view of one mooring wire (C) 13, one of the six mooring wires (A) 11, (B) 12, (C) 13, (D) 14, (E) 15, and (F) 16 described in Figure 5, passing through the mooring wire guide hole (B) 26 in the buoyancy body section 8 and wound around the wire winding / releasing machine 60. The mooring wire (C) 13 attached to the seabed foundation pile (C) 19 passes through the mooring wire guide hole (B) 26 molded in the side of the buoyant body section 8 described in Figure 5, then through a wire pulley (B) 62 attached near the mooring wire guide hole (B) 26 on the top surface of the buoyant body section 8, then through a wire pulley (A) 61 attached to the top surface of the buoyant body section 8 near the outside of the vertical section 34, then through a wire passing hole 63 that penetrates the tower section base 40 directly above the wire pulley (A) 61, and is wound around a wire winding and letting-out machine 60 attached near the outside of the vertical section 34 inside the first floor 38 of the building.By adjusting the length of the mooring wire (C) 13 configured in this way using the wire winding and letting-out machine 60, it is possible to easily adjust the vertical height and inclination of the floating offshore wind power plant 1 with an attached hydrogen factory relative to the sea surface 7. In this way, by evenly allocating and arranging the wire winding and letting-out machines 60 for individually winding and letting-out the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 on a circumference near the side of the vertical section 34 inside the first floor 38 of the building, it has become possible to efficiently utilize the space inside the first floor 38 of the building and to rationally perform maintenance of the wire winding and letting-out machines 60.

[0037] In Figure 7, we have explained about mooring wire (C) 13 out of the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 described in Figures 1 and 2. However, by utilizing wire pulleys and wire winding / releasing machines in the same way as mooring wire (C) 13, the length of each mooring wire can be adjusted using the wire winding / releasing machine, making it possible to maintain the horizontal position of the floating offshore wind farm 1 with an attached hydrogen factory.

[0038] The floating offshore wind power plant equipped with a hydrogen factory according to the present invention has been described in detail above 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.

[0039] In Figures 1 and 2, we have explained that there are "six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16," but the mooring wires may also be made of steel wire rope, synthetic fiber rope, or steel chain.

[0040] 3, it has been explained that "liquid hydrogen is produced from seawater by installing and operating a water electrolysis device 53 that electrolyzes fresh water using electricity generated by the power generation device inside the nacelle 3 to generate hydrogen, and a hydrogen liquefaction device 54 that further liquefies the electrolyzed hydrogen..." However, since the amount of power generated by a floating offshore wind turbine is unstable depending on the wind direction and wind force conditions, if electricity generated by the floating offshore wind turbine is directly connected to the water electrolysis device 53, the water electrolysis device 53 will enter an unstable state. Therefore, it is of course effective to operate the water electrolysis device 53 by incorporating a storage battery device (not shown) to stably supply power to the water electrolysis device 53.

[0041] 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 manufacture it 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.

[0042] 7, it was explained that "...by adjusting the length of the mooring wire (C) 13 configured in this way using the wire winding and letting-out machine 60, it is possible to easily adjust the vertical height and inclination of the floating offshore wind farm 1 relative to the sea surface 7." Of course, it is also possible to adjust the buoyancy of the buoyancy body 8 to the desired buoyancy by injecting and discharging ballast water (seawater) into a ballast water tank (not shown) installed inside the buoyancy body 8. [Brief explanation of the drawings]

[0043] [Figure 1] 1 is a perspective view showing a floating offshore wind farm equipped with a hydrogen plant according to an embodiment of the present invention. [Figure 2] 2 is a front view of the floating offshore wind power plant according to the embodiment, which is equipped with the hydrogen plant shown in FIG. 1. FIG. [Figure 3] 2A and 2B are plan and front views of a tower section, a support column, and a buoyancy body section according to the embodiment. [Figure 4] 2A and 2B are plan and front views of the support column and the buoyancy body according to the embodiment. [Figure 5] 5A and 5B are plan and front views showing the buoyant body shown in FIG. 4 fixed to the seabed by seabed foundation piles according to the embodiment. [Figure 6] FIG. 2 is a front view of the tower section, the support column, and the buoyancy body section according to the embodiment. [Figure 7] 3 is a front view showing a method of operating the mooring wire shown in FIG. 2 according to the embodiment. [Explanation of symbols]

[0044] 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 O Thickness of bottom slab of buoyancy body 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 hydrogen plant 2 blades 3 Nacelle 4 Tower section 5 Building 6 pillars 7 sea level 8 Buoyant body 9 Undersea 10. Hub 11 Mooring wire (A) 12 Mooring wire (B) 13 Mooring wire (C) 14 Mooring wire (D) 15 Mooring wire (E) 16 Mooring wire (F) 17 Submarine foundation pile (A) 18 Submarine foundation pile (B) 19 Submarine foundation pile (C) 20 Submarine foundation pile (D) 21 Submarine foundation piles (E) 22 Submarine foundation pile (F) 23 Steel pipe 25 Guide hole for mooring wire (A) 26 Mooring wire guide hole (B) 27 Mooring wire guide hole (C) 28 Mooring wire guide hole (D) 29 Mooring wire guide hole (E) 30 Mooring wire guide hole (F) 31 Front slope 32 Rear slope 33 Top 34 Pit Pit 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 (A) 42 Dot-dashed line (B) 43 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 Liquid hydrogen storage tank 56 Dot-dashed line (D) 57 Dot-dashed line (E) 58 Seawater desalination equipment 59 Battery storage equipment 60 Wire winding and unwinding machine 61 Wire pulley (A) 62 Wire pulley (B) 63 Wire hole

Claims

[Claim 1] A floating offshore wind power plant consists of a tower that supports multiple blades, a gearbox, and a nacelle that houses a generator. a tower section (4) to be placed offshore constructed of a conical reinforced concrete structure, with a top (33) formed of a circular plane, a steel pipe (23) for attaching a nacelle attached to the top (33), a tower section upper diameter (A) of the top (33) formed of a diameter of 5 m, a tower section upper slab thickness (B) of the top (33) formed of 500 mm, a tower section height (C) from the top (33) of the tower section (4) to the tower bottom (39) formed of 97 m, a lower part of the tower section (4) consisting of a four-story building (5) formed of a height of each floor of 5 m, a tower bottom slab thickness (D) at the bottom of the tower section (4) formed of 1 m, and a tower base diameter (S) of the lower part of the tower section (4) formed of a circle with a diameter of 25 m; The buoyancy body (8) to be placed underwater is cylindrical and constructed with a reinforced concrete structure, and is hollow inside in order to serve as a float for floating the floating offshore wind power plant (1) equipped with a hydrogen plant on the ocean. The thickness of the outer skin of the reinforced concrete on the outer surface and the upper and lower surfaces of the buoyancy body (8) is 200 mm for all of the upper, lower and outer surfaces. Furthermore, the front and rear bottoms of the buoyancy body (8) are formed in a shape that is inclined forward and backward. The buoyancy body portion (8) is formed in a circular shape with a diameter (N) of 100 m, and the buoyancy body portion height (J) of the buoyancy body portion (8) is formed to be 10 m. Furthermore, the forward inclined portion tip height (K) and the rear end height (R) of the rear inclined portion of the forward inclined portion (31) and the rear inclined portion (32) in the forward and rearward directions of the buoyancy body portion (8) are both formed to be 3 m. Furthermore, the forward inclined portion angle (M) and the rear inclined portion angle (P) of the forward inclined portion (31) and the rear inclined portion (32) are both formed to be 14 degrees. The maximum width (L) of the forward inclined portion (31) and the maximum width (Q) of the rear inclined portion (32) are both 12 m. Furthermore, on the side of the buoyancy body portion (8), six mooring wires (A) (11), (B) (12), (C) (13), (D) (14), (E) (15), and (F) (16) are provided with a radius of 12 m to guide them at fixed positions on the side of the buoyancy body portion (8). a buoyant body portion (8) having six mooring wire guide holes (A) (25), (B) (26), (C) (27), (D) (28), (E) (29), and (F) (30) each formed in a roughly semi-cylindrical shape with a length of 30 cm, the mooring wire guide holes being formed at positions extending radially from the center at 60-degree intervals when viewed horizontally with respect to the top surface of the buoyant body portion (8); In order to minimize the resistance caused by waves on the sea surface (7) and to suppress the swaying of the floating offshore wind power plant (1) which also houses a hydrogen plant, the eight supports (6) for connecting the tower section (4) and the buoyancy body section (8) are all made of cylindrical steel pipes with a diameter of 2 m, a thickness of 30 mm, and a length of 10 m. The eight supports (A) (45), (B) (46) are located at positions extending radially every 45 degrees from the center of the top surface of the buoyancy body section (8) on a circumference with a radius of 1050 cm when viewed on a horizontal plane. , a support (6) in which the centers of the support (C) (47), the support (D) (48), the support (E) (49), the support (F) (50), the support (G) (51), and the support (H) (52) are vertically mounted so as to be positioned, and the upper parts of the eight support (A) (45), the support (B) (46), the support (C) (47), the support (D) (48), the support (E) (49), the support (F) (50), the support (G) (51), and the support (H) (52) are attached to the underside of the tower bottom (39); a cylindrical pit section (34) having a diameter of 4 m, extending from approximately the top (33) of the tower section (4) through the tower bottom (39) to approximately the bottom of the center of the buoyancy body section (8); In order to moor the floating offshore wind power plant (1) with an attached hydrogen plant to the seabed (9) using a TLP type, six submarine foundation piles (A) (17), (B) (18), (C) (19), (D) (20), (E) (21), and (F) (22) were installed on the seabed (9), and six mooring wires (A) (11), (B) (16), (B) (17), (B) (18), (C) (19), (D) (20), (E) (21), and (F) (22) were attached to each of them. (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) are attached, and a wire winding and letting-off machine (60) for individually winding and letting-off the six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) is installed in the vertical section (34) inside the first floor (38) of the building. and a wire winding and letting-out machine (60) configured to evenly allocate and arrange mooring wires on a circumference near the side of the floating body section (8), pull one end of the mooring wires that have passed through a mooring wire guide hole formed on the side of the floating body section (8) into the building of the tower section (4) via a wire pulley, and individually adjust the length of the mooring wires to forcibly submerge the floating body section (8) so as to maintain it horizontal to the sea surface (7), thereby minimizing the pitch and roll of the floating offshore wind power plant (1) with an attached hydrogen factory relative to the sea surface (7) and maintaining it in a horizontal state. This floating offshore wind power plant is characterized in that a seawater desalination plant (58) for converting seawater into fresh water is installed inside the building (5) of the tower section (4) configured in this manner, a water electrolysis device (53) for electrolyzing the fresh water produced in the seawater desalination plant (58) with electricity generated by a power generation device inside the nacelle to generate hydrogen, and a hydrogen liquefaction device (54) for liquefying the electrolyzed hydrogen are installed and operated, thereby producing liquid hydrogen from seawater, and the produced liquid hydrogen is passed through the vertical compartment (34) and stored in a liquid hydrogen storage tank (55) in a cold box installed inside the buoyancy body section (8).

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