Floating body type offshore wind power station installed 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 equipped with a water electrolysis device and a liquid hydrogen storage facility.

Background Art

[0002] In recent years, with the increasing use of renewable energy, it is expected that stable power can be obtained in the ocean because there are no obstacles blocking the wind, and the wind direction and wind speed are constant and do not change. Currently, the structure of offshore wind power generation devices that have been put into practical use is the same as that of devices operating on land. Since there are fewer restrictions on installing wind power generation devices in the ocean compared to on land, it is considered that installations in the ocean will increase in the future.

[0003] Currently, in the case of the fixed-type offshore wind power generation devices that are popular in Europe and other regions, where the support columns reach the seabed, they are suitable for relatively shallow water areas with a water depth of about 50 m. However, in Japan, since the area of the continental shelf with a relatively shallow water depth is small, the current situation is that Japan is shifting to a floating type in which the wind power generation device is floated on the ocean and its position is maintained by mooring to the seabed with chains, wire ropes, etc.

[0004] A floating offshore wind power generation device is composed of a floating body arranged in water and a tower erected on the floating body, and a wind power generation device composed of a nacelle and blades is attached to the top of the tower. Currently, the mainstream floating offshore wind power technologies mainly include four types: spar type, semi-submersible type, barge type, and TLP type.

[0005] Currently, an increase in the output of each device is required, and accordingly, it is necessary to increase the length of the blades to enlarge the windward area of the wind turbine body. Currently, large-scale offshore wind power generation devices with blade lengths exceeding 80 m are being put into practical use.

[0006] Conventionally, in order to install a floating offshore wind power generation device in a designated sea area, the floating body was towed to the installation sea area by a mother ship or the like and moored. After that, the upper structure was moved to the upper end of the floating body by a crane ship or the like, and the floating body and the upper structure were connected.

[0007] In recent years, among renewable energies, hydrogen called "green hydrogen" produced by a method of using electricity generated by solar power generation, wind power generation, etc. and electrolyzing water to separate it into hydrogen and oxygen has attracted attention. Currently, the electricity generated by the floating offshore wind power generation device is sent to a hydrogen production factory via a submarine power transmission cable laid on the seabed and hydrogen is produced from water by a water electrolysis hydrogen production device. Therefore, it is necessary to newly install power transmission facilities on the seabed, which becomes a large-scale construction project and the installation cost becomes enormous, hindering its popularization.

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, in sea areas with a water depth of 50 m or more where floating offshore wind power generation devices are installed, the sea state conditions are often more severe than those in sea areas where general marine construction work is carried out. The installation work of floating offshore wind power generation devices must be carried out taking into account relatively calm periods of sea state conditions under severe sea state conditions. Therefore, there was a problem that the implementation time and period of the installation work were limited.

[0009] Furthermore, the installation of floating offshore wind power generation devices requires delicate work using large work vessels, which also causes problems such as an increase in construction costs.

[0010] Furthermore, in order to produce "green hydrogen" with the electricity generated by the floating offshore wind power generation device, there was also a problem that a submarine power transmission cable for transmitting electricity to a hydrogen production factory had to be laid on the seabed.

[0011] In view of the above current situation, the present invention constructs facilities for building a floating offshore wind power plant on the coast near the sea where the floating offshore wind power plant is to be installed, makes use of the technologies cultivated in construction work such as super high-rise buildings to build the floating offshore wind power plant, floats the floating offshore wind power plant assembled on land on the water, and tow it to the site by a tugboat (towboat), thereby providing a significant reduction in the construction days and an efficient construction method on land, and in order to efficiently produce green hydrogen, a water electrolysis device for generating hydrogen by electrolyzing seawater using the electricity generated by the floating offshore wind power plant as a power source is installed inside the floating offshore wind power plant, and a liquid hydrogen storage facility for storing the generated hydrogen is installed.

Means for Solving the Problems

[0012] In order to solve such problems, the invention according to claim 1 is a floating offshore wind power generation composed of a tower that supports a nacelle incorporating a plurality of blades, a speed increaser, and a generator. The tower part arranged on the sea and the buoyancy body part arranged underwater are constructed with a reinforced concrete structure, the tower part and the buoyancy body part are connected by a plurality of columns, the buoyancy body part is moored to a plurality of submarine foundation piles fixed to the seabed by a plurality of mooring wires, a water electrolysis device for generating hydrogen by electrolyzing water with the electricity generated by the floating offshore wind power generation is installed in the building of the tower part, and a liquid hydrogen storage tank for storing the hydrogen generated by the water electrolysis device is installed in the buoyancy body part.

[0013] The invention according to claim 2, in addition to the structure according to claim 1, is characterized in that the tower part is generally conical and the lower part is composed of a multi-story building, the top part is formed with a circular plane, and a steel pipe for attaching a nacelle is attached to the top part.

[0014] The invention according to claim 3, in addition to the structure according to claim 1 or 2, is characterized in that the buoyancy body part is generally cylindrical and the inside is hollow, and in order to float the floating offshore wind power plant constructed on land near the sea on the water, the bottoms in both the front and rear directions are inclined toward the front end part and the rear end part.

[0015] The invention according to claim 4, in addition to the structure according to any one of claims 1 to 3, connects the buoyancy body part with a plurality of seabed foundation piles installed on the seabed and a plurality of mooring wires and moors it in a TLP type, and one end of the plurality of mooring wires passing through the mooring wire guide holes formed on the side surface of the buoyancy body part is drawn into the building of the tower part via a plurality of wire pulleys, and is configured to maintain the horizontal state of the floating offshore wind power plant by adjusting the individual lengths of the mooring wires with a wire winding and feeding machine.

[0016] The invention according to claim 5, in addition to the structure according to any one of claims 1 to 4, constructs a vertical hole partition penetrating from approximately the upper end of the tower part to approximately the lower end of the buoyancy body part, and installs a simple lift and a staircase for vertical movement inside the vertical hole partition.

[0017] The invention according to claim 6, in addition to the structure according to any one of claims 1 to 5, installs a hydrogen liquefaction device for liquefying the hydrogen produced by the water electrolysis device in the building of the tower part.

Advantages of the Invention

[0018] According to the invention described in claim 1, in a floating offshore wind power generation composed of a tower that supports a nacelle incorporating a plurality of blades, a speed increaser, and a generator, the tower part arranged offshore and the buoyancy body part arranged underwater are constructed with a reinforced concrete structure, the tower part and the buoyancy body part are connected by a plurality of columns, the buoyancy body part is moored to a plurality of seabed foundation piles fixed to the seabed by a plurality of mooring wires, a water electrolysis device that generates hydrogen by electrolyzing water with the electricity generated by the floating offshore wind power generation is installed in the building of the tower part, and a liquid hydrogen storage tank for storing the hydrogen generated by the water electrolysis device is installed in the buoyancy body part. By utilizing the technology cultivated at construction sites such as super high-rise buildings, the production days are significantly shortened, and it becomes possible to directly generate hydrogen by electrolyzing seawater using the electrical output obtained from the floating offshore wind power plant as a power source.

[0019] According to the invention described in claim 2, the tower part is generally conical and the lower part is composed of a multi-story building, and the top part is formed with a circular plane. By attaching a steel pipe for attaching a nacelle to the top part, it becomes possible to reduce the wind pressure of the wind on the tower part.

[0020] According to the invention described in claim 3, the buoyant body part is generally cylindrical and the inside is hollow. In order to float a floating offshore wind power plant constructed on land near the sea on the water, the bottoms in both the front and rear directions are inclined toward the front end and the rear end, so that the resistance of water can be reduced and it becomes possible to float on the water in a stable state.

[0021] According to the invention described in claim 4, the buoyant body part is connected by a plurality of subsea foundation piles installed on the seabed and a plurality of mooring wires and moored in a TLP type. One end of the plurality of mooring wires passing through the mooring wire guide holes formed on the side surface of the buoyant body part is drawn into the building of the tower part via a plurality of wire pulleys, and the individual lengths of the mooring wires are adjusted by a wire winding / sending machine so as to maintain the horizontal state of the floating offshore wind power plant. By configuring like this, it becomes possible to adjust the lengths of the individual mooring wires and easily maintain the horizontal state of the floating offshore wind power plant.

[0022] According to the invention described in claim 5, a vertical hole section penetrating from generally the upper end of the tower part to generally the lower end of the buoyant body part is constructed, and a simple lift and stairs for vertical movement are installed inside the vertical hole section, so that it becomes possible to greatly reduce the labor for maintenance workers.

[0023] According to the invention described in claim 6, a hydrogen liquefaction device for liquefying hydrogen produced by the water electrolysis device is installed in the building of the tower part, so that it becomes possible to liquefy hydrogen with the electricity generated by the floating offshore wind power plant.

Embodiment

[0024] The following describes embodiments of the present invention.

Embodiments for Carrying out the Invention

[0025] Figs. 1 to 7 show embodiments of the present invention.

[0026] Fig. 1 shows in perspective view a state where a floating offshore wind power plant 1 with a co-located hydrogen plant of the present invention is installed offshore. The floating offshore wind power plant 1 with a co-located hydrogen plant includes three blades 2 attached to a hub 10, a speed increaser, a generator, a yaw control device, etc. installed inside a nacelle 3, a steel pipe 23 for fixing the nacelle 3 to a tower part 4, a tower part 4 constructed with a reinforced concrete structure, and eight struts 6 formed of steel pipes with a diameter of about 2 m, a wall thickness of about 30 mm, and a length of about 10 m for connecting the tower part 4 and a buoyancy body part 8. Further, the floating offshore wind power plant 1 with a co-located hydrogen plant is floated and made self-supporting offshore, and is composed of a buoyancy body part 8 formed with a hollow interior in a reinforced concrete structure to serve as a floating structure part. In order to moor the buoyancy body part 8 configured in this way to the seabed 9 in a TLP type so as to suppress the amount of sway as much as possible, six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, mooring wire (F) 16, and six subsea foundation piles (A) 17, subsea foundation pile (B) 18, subsea foundation pile (C) 19, subsea foundation pile (D) 20, subsea foundation pile (E) 21, subsea foundation pile (F) 22 fixed to the seabed 9 for fixing the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, mooring wire (F) 16 to the seabed 9 are provided. Note that since the nacelle 3 attached to the steel pipe 23 needs to always follow the blade 2 with respect to the direction of the blowing wind, a yaw control device (not shown) is attached inside the nacelle 3 so as to be rotatable 360 degrees with respect to the steel pipe 23.

[0027] Figure 2 shows a front view of the floating offshore wind power plant 1 with an integrated hydrogen plant described in Figure 1. In the present invention, in order to moor the floating offshore wind power plant 1 with an integrated hydrogen plant to the seabed 9 in the TLP type, six subsea foundation piles (A) 17, subsea foundation piles (B) 18, subsea foundation piles (C) 19, subsea foundation piles (D) 20, subsea foundation piles (E) 21, and subsea foundation piles (F) 22 installed on the seabed 9 are respectively attached with 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. By individually adjusting the lengths of 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 so that the sea surface 7 is approximately at the vertical center position of the support column 6, the buoyancy body 8 is forced to dive to keep horizontal with respect to the sea surface 7. As a result, the floating offshore wind power plant 1 with an integrated hydrogen plant can greatly suppress pitching and rolling with respect to the sea surface 7 and maintain a horizontal state, and it becomes possible to rotate the blade 2 in a stable state against the wind.

[0028] Figure 3 shows the tower section 4, the support column 6, and the buoyancy body section 8 described in FIGS. 1 and 2 in a plan view of FIG. 3a and a front view of FIG. 3b. The tower section 4 is constructed of a generally conical reinforced concrete structure. The top portion 33 is formed in a circular shape with a diameter of approximately 5 m as shown by the upper tower diameter A in FIG. 6. The upper tower slab thickness B is approximately 500 mm. The tower height C from the top portion 33 to the tower bottom 39 of the tower section 4 is approximately 97 m. The tower bottom slab thickness D that constitutes the tower base 40 of the tower section 4 is approximately 1 m. The tower base diameter S that constitutes the tower base 40 is circular with a diameter of approximately 25 m. At the lower part of the tower section 4, a building 5 with a four-story structure (shown as the first floor 38 of the building, the second floor 37 of the building, the third floor 36 of the building, and the fourth floor 35 of the building) with each floor height formed to be approximately 5 m is constructed. The buoyancy body section 8 is generally cylindrical and has a hollow interior to serve as a floating body. As shown in FIG. 6, the buoyancy body diameter N of the buoyancy body section 8 is approximately 100 m, and the buoyancy body height J is approximately 10 m. Further, as shown in FIG. 3, in order to float the floating offshore wind power plant 1 with a hydrogen factory constructed on land annexed in a stable state in the front and rear of the bottom surface of the buoyancy body section 8, both the front and rear bottoms are inclined at an angle of approximately 14 degrees as shown by the front inclined portion 31 (the boundary between the bottom and the front inclined portion 31 is shown by the dashed line (A) 41 in FIG. 3a) and the rear inclined portion 32 (the boundary between the bottom and the rear inclined portion 32 is shown by the dashed line (B) 42 in FIG. 3a) toward the tip and the rear end, and are formed in a shape inclined at an angle of approximately 14 degrees as shown by the front inclined portion angle M and the rear inclined portion angle R in FIG. 6. Further, eight support columns 6 formed of steel pipes with a diameter of approximately 2 m, a wall thickness of approximately 30 mm, and a length of approximately 10 m around the center of the upper surface of the buoyancy body section 8 are attached at positions on a circumference radially extending at 45-degree intervals from the center when viewed in a horizontal plane to connect the tower section 4 and the buoyancy body section 8.

[0029] Furthermore, on the side surface of the buoyancy body 8, 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 with reference to FIGS. 1 and 2 are guided at fixed positions on the side surface of the buoyancy body 8. Therefore, 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 are formed, each having a radius of approximately 30 cm and being generally semi-cylindrical (kamaboko-shaped).

[0030] Furthermore, a vertical hole section 34 is constructed that penetrates from approximately the top 33 of the tower section 4 to the tower bottom 39 and extends to approximately the bottom of the central part of the buoyancy body 8, being formed in a generally cylindrical shape with a diameter of approximately 4 m as shown by the dashed-dotted line (C) 43. Additionally, by installing a staircase (not shown) for vertical movement and a simple lift (not shown) for inspection work inside the vertical hole section 34, it has become possible to improve work efficiency.

[0031] Inside the building 5 of the tower section 4 configured in this way, a seawater desalination device 58 for converting seawater into fresh water is installed. The fresh water generated by the seawater desalination device 58 is used to electrolyze water to generate hydrogen using electricity generated by a power generation device inside the nacelle 3. Furthermore, a hydrogen liquefaction device 54 for liquefying the electrolyzed hydrogen is installed and operated. In this way, it becomes possible to produce liquid hydrogen from seawater and store the produced liquid hydrogen in a liquid hydrogen storage tank 55 inside a cold box installed inside the buoyancy body 8 via the vertical hole section 34. By configuring it in this way, it becomes possible to liquefy the volume of hydrogen generated by electrolysis into liquid hydrogen that is about 1 / 800 and store it efficiently. The liquid hydrogen produced in this way is loaded onto a liquefied hydrogen carrier ship and transported.

[0032] Figure 4 shows the support column 6 and the buoyancy body 8 described in FIGS. 1 and 2 in the plan view of FIG. 4a and the front view of FIG. 4b. 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 formed on the outer peripheral portion of the buoyancy body 8 are formed at positions radially extending every 60 degrees from the center when viewed horizontally with respect to the upper surface of the buoyancy body 8. The shapes of the 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 are all formed in a generally semi-cylindrical (kamaboko-shaped) shape with a radius of about 30 cm.

[0033] Furthermore, the eight support columns 6 for connecting the tower part 4 and the buoyancy body 8 are all formed of cylindrical steel pipes with a diameter of about 2 m, a wall thickness of 30 mm, and a length of 10 m. They are vertically attached so that the centers of the eight support columns (A) 45, support column (B) 46, support column (C) 47, support column (D) 48, support column (E) 49, support column (F) 50, support column (G) 51, and support column (H) 52 are located at positions radially extending every 45 degrees from the center when viewed horizontally on a circumference with a radius of about 1050 cm from the center of the upper surface of the buoyancy body 8. The upper parts of the eight support columns (A) 45, support column (B) 46, support column (C) 47, support column (D) 48, support column (E) 49, support column (F) 50, support column (G) 51, and support column (H) 52 are attached to the lower surface of the tower bottom 39 described in FIG. 3. The reason for connecting the tower part 4 and the buoyancy body 8 with the eight support columns 6 in this way is to minimize the resistance caused by the waves on the sea surface 7 described in FIG. 2 by supporting the tower part 4 with cylindrical round support columns with a diameter of about 2 m, suppress the sway of the floating offshore wind power plant 1 equipped with a hydrogen factory, and make the blades face the direction from which the wind blows.

[0034] Fig. 5 shows 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 for mooring the buoyancy body 8 described in Figs. 1 and 2 to the seabed 9, presented in the plan view of Fig. 5a and the front view of Fig. 5b. By adjusting the length of each mooring wire individually with the wire winding and feeding machine 60 shown in Fig. 7 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 surface of the buoyancy body 8 so that the buoyancy body 8 is horizontal with respect to the sea surface 7, the floating type offshore wind power plant 1 with an attached hydrogen factory can easily maintain a horizontal state with respect to the sea surface 7. The positional relationship between 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, mooring wire guide hole (F) 30 and the six subsea foundation piles (A) 17, subsea foundation pile (B) 18, subsea foundation pile (C) 19, subsea foundation pile (D) 20, subsea foundation pile (E) 21, and subsea foundation pile (F) 22 is such that in order to minimize the sway of the buoyancy body 8 due to ocean currents and waves, the six subsea foundation piles (A) 17, subsea foundation pile (B) 18, subsea foundation pile (C) 19, subsea foundation pile (D) 20, subsea foundation pile (E) 21, and subsea foundation pile (F) 22 are fixed to the seabed 9 directly below 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, making it possible to reduce the occupied area below the sea surface, which is one of the characteristics of the TLP type.

[0035] Figure 6 shows the dimensions and angles of the members of the tower part 4, the support columns 6, and the buoyancy body part 8 described in FIGS. 1 and 2, indicated by symbols A to S. The tower part 4 is generally conical, and the top part 33 is formed into a circular plane. The upper tower diameter A of the top part 33 is formed to be approximately 5 m in diameter. Further, the upper tower slab thickness B of the top part 33 is formed to be approximately 500 mm. Further, the vertical hole section 34 is formed in a cylindrical shape with a diameter of approximately 4 m from approximately the upper end of the tower part 33 through the tower base 40 of the tower part to approximately the lower end of the buoyancy body part 8, as shown by the dashed line (C) 43. Further, the tower height C of the tower part 4 from the top part 33 to the tower bottom 39 is formed to be approximately 97 m. Further, the building 4th floor height F of the four-story building 5 is approximately 5 m, the building 3rd floor height G is approximately 5 m, the building 2nd floor height H is approximately 5 m, and the building 1st floor height I is approximately 5 m. Further, the tower bottom slab thickness D at the bottom of the tower part 4 is formed to be approximately 1 m, and the tower base diameter S at the lower part of the tower part 4 is formed in a circular shape with a diameter of approximately 25 m. Further, the column heights E of all eight support columns 6 are formed to be approximately 10 m. Further, the thickness of the reinforced concrete of the buoyancy body part 8 is formed to be approximately 200 mm for both the upper part, the lower part, and the outer peripheral surface. Further, the front and rear bottoms of the buoyancy body part 8 constructed with a reinforced concrete structure are formed in a shape inclined forward and backward. Further, the buoyancy body diameter N of the buoyancy body part 8 is formed in a circular shape with a diameter of approximately 100 m. Further, the buoyancy body height J of the buoyancy body part 8 is formed to be approximately 10 m. The front inclination part tip height K of the front inclination part 31 and the rear inclination part 32 in the front and rear directions of the buoyancy body part 8 described in FIG. 3, and the rear inclination part rear end height R are both formed to be approximately 3 m. The front inclination part angle M and the rear inclination part angle P of the front inclination part 31 and the rear inclination part 32 described in FIG. 3 are both formed to be approximately 14 degrees. The front inclination part maximum width L of the front inclination part 31 and the rear inclination part maximum width Q of the rear inclination part 32 are both formed to be approximately 12 m. Further, the buoyancy body bottom slab thickness O at the lower part of the vertical hole section 34 is formed to be approximately 200 mm. By constructing the center of the tower part 4, the centers of the eight support columns 6, and the center of the buoyancy body part 8 in a straight line in this way, the floating type offshore wind power plant 1 with a hydrogen factory annexed can maintain a well-balanced horizontal state with respect to the sea surface 7.

[0036] Fig. 7 is a partial cross-sectional view showing a state in which one 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 Fig. 5, i.e., the mooring wire (C) 13, is wound around a wire winding / sending machine 60 via a mooring wire guide hole (B) 26 of a buoyancy body portion 8. The mooring wire (C) 13 attached to the submarine foundation pile (C) 19 passes through the mooring wire guide hole (B) 26 formed on the side surface of the buoyancy body portion 8 described in Fig. 5, and passes through a wire pulley (B) 62 attached near the mooring wire guide hole (B) 26 on the upper surface of the buoyancy body portion 8, and further passes through a wire pulley (A) 61 attached to the upper surface of the buoyancy body portion 8 near the outer side of the vertical hole section 34. Then, it passes through a wire through-hole 63 penetrating the tower base 40 directly above the wire pulley (A) 61, and is wound around a wire winding / sending machine 60 attached near the outer side of the vertical hole section 34 inside the first floor 38 of the building. By adjusting the length of the mooring wire (C) 13 configured in this way by the wire winding / sending machine 60, it becomes possible to easily adjust the vertical height and inclination of the floating offshore wind power generation plant 1 with a hydrogen factory installed thereon with respect to the sea surface 7. By arranging the wire winding / sending machines 60 for individually winding and sending 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 evenly on the circumference near the side surface of the vertical hole section 34 inside the first floor 38 of the building, the space inside the first floor 38 of the building can be utilized efficiently, and it becomes possible to perform maintenance of the wire winding / sending machine 60 reasonably.

[0037] In FIG. 7, among 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 FIGS. 1 and 2, the mooring wire (C) 13 was explained. However, for the other five mooring wires (A) 11, mooring wire (B) 12, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16, by utilizing the wire pulley and the wire winding / sending machine in the same manner as the mooring wire (C) 13, the length of each mooring wire can be adjusted by the wire winding / sending machine, and it has become possible to maintain the horizontal state of the floating offshore wind power plant 1 equipped with a hydrogen factory.

[0038] As described above in detail based on the embodiments, the floating offshore wind power plant equipped with a hydrogen factory according to the present invention has been described. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention, and of course, it belongs to the technical scope of the present invention.

[0039] In FIGS. 1 and 2, "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" were described. However, for the types of mooring wires, steel wire ropes, synthetic fiber ropes, or steel chains may also be used.

[0040] In FIG. 3, "··· a water electrolysis device 53 for generating hydrogen by electrolyzing fresh water with electricity generated by the power generation device inside the nacelle 3, and further installing and operating a hydrogen liquefaction device 54 for liquefying the electrolyzed hydrogen to produce liquid hydrogen from seawater ···" was described. However, since the power generation amount of the floating offshore wind power generation device is unstable depending on the wind direction and wind force conditions, if the electricity generated by the floating offshore wind power generation device is directly connected to the water electrolysis device 53, the water electrolysis device 53 will be in an unstable state. Therefore, a method of incorporating a battery device (not shown) to stably supply power to the water electrolysis device 53 and operating the water electrolysis device 53 is of course effective.

[0041] In FIG. 1, it was described that the support column 6 was formed of a steel pipe with a diameter of about 2 m, a wall thickness of about 30 mm, and a length of about 10 m. However, it is of course possible to fabricate it with a reinforced concrete structure having a cylindrical shape, a diameter of about 2 m, a cylinder thickness of about 20 cm, and a length of about 10 m.

[0042] In FIG. 7, it was described that "··· By adjusting the length of the mooring wire (C) 13 configured in this way by the wire winding / feeding machine 60, it becomes possible to easily adjust the vertical height and inclination of the floating offshore wind power plant 1 with respect to the sea surface 7." However, of course, it is also possible to adjust the buoyancy of the buoyancy body portion 8 to the planned buoyancy by injecting and discharging ballast water (seawater) into a ballast water tank (not shown) installed inside the buoyancy body portion 8.

Brief Description of the Drawings

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Figure 7

Explanation of Reference Numerals

[0044] A Upper diameter of the tower portion Upper slab thickness of Tower B Height of Tower C Bottom slab thickness of Tower D Height of the support column Height of the 4th floor of the building Height of the 3rd floor of the building Height of the 2nd floor of the building Height of the 1st floor of the building Height of the buoyancy body part Height of the tip of the front inclined part Maximum width of the front inclined part Angle of the front inclined part Diameter of the buoyancy body part Bottom slab thickness of the buoyancy body part Angle of the rear inclined part Maximum width of the rear inclined part Height of the rear end of the rear inclined part Diameter of the tower base Floating offshore wind power plant with a hydrogen factory co-located Blade Nacelle Tower part Building Support column Sea surface Buoyancy body part Seabed Hub Mooring wire (A) Mooring wire (B) Mooring wire (C) Mooring wire (D) Mooring wire (E) Mooring wire (F) Subsea foundation pile (A) Subsea foundation pile (B) Subsea foundation pile (C) Subsea foundation pile (D) Subsea foundation pile (E) Subsea foundation pile (F) Steel pipe Guide hole for mooring wire (A) Guide hole for mooring wire (B) Guide hole for mooring wire (C) 28 Guide Hole (D) for Mooring Wire 29 Guide Hole (E) for Mooring Wire 30 Guide Hole (F) for Mooring Wire 31 Front Tilt Section 32 Rear Tilt Section 33 Top Section 34 Vertical Hole Section 35 Fourth Floor of Building 36 Third Floor of Building 37 Second Floor of Building 38 First Floor of Building 39 Tower Bottom 40 Tower Base 41 Dashed Line (A) 42 Dashed Line (B) 43 Dashed Line (C) 45 Support Column (A) 46 Support Column (B) 47 Support Column (C) 48 Support Column (D) 49 Support Column (E) 50 Support Column (F) 51 Support Column (G) 52 Support Column (H) 53 Water Electrolysis Device 54 Hydrogen Liquefaction Device 55 Liquid Hydrogen Storage Tank 56 Dashed Line (D) 57 Dashed Line (E) 58 Seawater Desalination Device 59 Battery Equipment 60 Wire Reeling and Feeding Machine 61 Pulley (A) for Wire 62 Pulley (B) for Wire 63 Wire Passing Hole

Claims

1. In a floating offshore wind power generation composed of a tower that supports a nacelle incorporating a plurality of blades, a speed increaser, and a generator, a tower part disposed offshore and a buoyancy body part disposed underwater are constructed of a reinforced concrete structure, and the tower part and the buoyancy body part are connected by a plurality of columns, the buoyancy body part is moored to a plurality of submarine foundation piles fixed to the seabed by a plurality of mooring wires, an electrolyzer for generating hydrogen by electrolyzing water with electricity generated by the floating offshore wind power generation is installed in the building of the tower part, A floating offshore wind power plant with an attached hydrogen plant, characterized in that a liquid hydrogen storage tank for storing hydrogen generated by the electrolyzer is installed in the buoyancy body part.

2. The tower part is generally conical and the lower part is composed of a multi-story building, and the top part is formed in a circular plane, and a steel pipe for attaching a nacelle is attached to the top part. The floating offshore wind power plant with an attached hydrogen plant according to Claim 1.

3. The buoyancy body part is generally cylindrical and the inside is hollow. In order to float a floating offshore wind power plant constructed on land near the sea on the water, the bottoms in both the front and rear directions are inclined toward the front end and the rear end. The floating offshore wind power plant with an attached hydrogen plant according to Claim 1 or 2.

4. The buoyancy body part is connected to a plurality of submarine foundation piles installed on the seabed by a plurality of mooring wires and moored in a TLP type, and one end of the plurality of mooring wires passing through guide holes for mooring wires formed on the side surface of the buoyancy body part is pulled into the building of the tower part via a plurality of wire pulleys, and the individual lengths of the mooring wires are adjusted by a wire winding / sending machine to maintain the horizontal state of the floating offshore wind power plant. The floating offshore wind power plant with an attached hydrogen plant according to any one of Claims 1 to 3.

5. A vertical hole partition is constructed that penetrates from approximately the upper end of the tower part to approximately the lower end of the buoyancy body part, and a simple lift and stairs for vertical movement are installed inside the vertical hole partition. The floating offshore wind power plant with an attached hydrogen plant according to any one of Claims 1 to 4.

6. A floating offshore wind power plant co-located with the hydrogen plant according to any one of claims 1 to 5, characterized in that a hydrogen liquefaction device for liquefying hydrogen produced by the water electrolysis device is installed inside the building of the tower section.

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