Deep sea floating type wind power-temperature difference energy comprehensive utilization system

Abstract

The invention discloses a deep sea floating type wind power-temperature difference energy comprehensive utilization system, which belongs to the technical field of offshore wind power generation and comprises a wind power generation system, an energy and fresh water comprehensive platform, a single-upright floating type foundation, an anchor chain tensioning device, a mooring anchor chain, an anchoring device and the like. A wind power generation system is fixedly connected to the top end of a single-stand-column floating type foundation, a plurality of anchor chain tensioning devices are arranged on the outer side of the single-stand-column floating type foundation and fixedly connected with an anchoring device through mooring anchor chains, and an energy and fresh water comprehensive platform is arranged on the wind power generation system in a surrounding mode at the position higher than the sea level by a certain distance. The characteristic that the application water depth condition of the single-stand-column floating type foundation is highly matched with the temperature difference energy development environment is utilized, the single-stand-column floating type foundation and the temperature difference energy development environment are organically integrated, and therefore the benefits of wind power generation and temperature difference energy power generation are superposed. Gains brought by temperature difference energy development are utilized, the comprehensive cost of the system is reduced, and efficient development and utilization of deep-sea ocean energy are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of floating wind turbines and comprehensive utilization of temperature difference energy, and specifically relates to a deep-sea floating wind power-temperature difference energy comprehensive utilization system. Background Art

[0002] With the gradual depletion of energy sources such as oil and coal and the frequent occurrence of extreme weather problems, people's demand for clean energy is constantly increasing. The ocean contains a wealth of clean and renewable energy, such as wind energy, tidal energy, temperature difference energy, and salinity difference energy.

[0003] Among various ocean energies, ocean temperature difference energy belongs to ocean thermal energy, and its main source of energy is the solar radiation energy stored in the ocean. Ocean temperature difference energy has the characteristics of huge reserves and relatively stable changes over time. Therefore, the use of ocean temperature difference energy to generate electricity is expected to provide large-scale and stable electricity. Temperature difference energy power generation technology uses the surface seawater (25℃~28℃) heated by solar energy in the ocean as a high-temperature heat source, and the deep seawater (4℃~7℃) at a depth of 500 meters to 1000 meters as a low-temperature heat source, and uses a thermal cycle system composed of heat engines to generate electricity.

[0004] Offshore wind energy is one of the earliest marine energy sources to be commercially developed, with advantages such as rich resource reserves, no occupation of valuable land, and close proximity to power load centers. At present, offshore wind power is advancing from nearshore to deep sea, and the structure of offshore wind turbine support has changed from fixed to floating. The difficulty and cost of development are constantly increasing. How to achieve cost reduction and efficiency improvement has become an important issue in the development of offshore wind power.

[0005] The wind turbines used in floating and bottom-fixed wind power projects are exactly the same. The difference lies in the different wind power support foundations. The floating wind power foundation is the platform on which the unit relies to maintain stable operation. The mainstream forms are single-column, semi-submersible, tension-leg and barge. Among them, the single-column platform is cylindrical, and the main structure consists of buoyancy and ballast tanks, transition sections, and mooring systems. The ballast tanks promote the center of buoyancy of the platform to be higher than the center of gravity, maintaining good stability, and the draft is large. The operating water depth needs to be greater than 100 meters.

[0006] In summary, the organic combination of floating wind power and the development and utilization of temperature difference energy to increase the overall comprehensive utilization benefits may become one of the effective means to reduce costs and increase efficiency in deep-sea wind power and ocean energy development. Summary of the invention

[0007] The purpose of the present invention is to solve the problem of how to organically combine the existing floating wind power with the development and utilization of temperature difference energy to achieve cost reduction and efficiency improvement.

[0008] In order to solve the above technical problems, the present invention provides a deep-sea floating wind power-temperature difference energy comprehensive utilization system, including a single-column floating foundation fixed on the seabed, the top of the single-column floating foundation is fixedly connected to a wind power generation system, a plurality of groups of anchor chain tensioning devices are arranged on the outside of the single-column floating foundation, the anchor chain tensioning devices are fixedly connected to the anchoring device through mooring anchor chains, and the wind power generation system is surrounded by an energy and fresh water integrated platform at a certain distance above the sea level.

[0009] Preferably, the wind power generation system converts wind energy on the sea surface into electrical energy through a wind turbine generator set, and then transmits it to the lower energy and freshwater integrated platform through cables.

[0010] Preferably, the energy and fresh water integrated platform comprises a platform deck arranged at the bottom of the tower in the wind power generation system, the edge of the platform deck is protected by a platform railing, the surface of the platform deck is provided with a boarding entrance, a methanol production device, a water electrolysis hydrogen production device, a seawater desalination device, a methanol storage device, a fresh water storage device, a fresh water supply device, and a methanol supply device, a plurality of platform main columns are arranged under the platform deck, the platform main columns are fixedly connected to the wind power generation system by a horizontal connecting rod 1, an oblique connecting rod and a horizontal connecting rod 2, and a floating body motion suppression structure is also arranged at the bottom of the platform main column.

[0011] Preferably, a mooring device and a platform landing device are provided below the landing entrance.

[0012] Preferably, the boarding entrance is arranged between main columns of adjacent platforms.

[0013] Preferably, the single-column floating foundation is in the form of a cylinder with an internal cavity, and the single-column floating foundation is divided from top to bottom by a cabin partition plate into a transition tank, a temperature difference energy power generation cabin, a liquid-gas conversion cabin, a gas-liquid conversion cabin and a ballast tank, and a warm seawater inlet is provided 2m below the lowest tide level of the single-column floating foundation, and a cold seawater inlet is provided at the bottom.

[0014] Preferably, a seawater storage and distribution device is provided in the transition cabin, a turbine generator is installed in the temperature difference energy power generation cabin, an evaporation device is arranged in the liquid-gas conversion cabin, and a condensation device is provided in the gas-liquid conversion cabin.

[0015] Preferably, a plurality of cabin reinforcement ribs are arranged above and below the partition plate, and an in-cabin reinforcement ring plate is arranged in the middle of the cabin.

[0016] Preferably, the condensing device is provided with a cold seawater discharge port, and the evaporating device is provided with a warm seawater discharge port. Flexible pipes are arranged along the bulkhead and the compartment partition plate for conveying warm seawater, cold seawater and working fluid between the compartments.

[0017] Beneficial effects of the present invention: 1. This scheme uses the fact that the application water depth of the single-column floating foundation is highly compatible with the temperature difference energy development environment, and organically integrates the two, thereby superimposing the benefits of wind power generation and temperature difference energy generation. By utilizing the gains brought by temperature difference energy development, the overall cost of the system is reduced, and the efficient development and utilization of deep-sea ocean energy is realized.

[0018] 2. This plan sets up an integrated energy and fresh water platform near the sea surface, integrating functions such as hydrogen production, methanol production, seawater desalination, energy storage and water storage, so as to provide green fuel and fresh water supply for ships and avoid the high cost of transporting them from deep sea to shore over long distances.

[0019] 3. This solution can improve the overall stability of the system by installing platform columns on the energy and freshwater integrated platform. At the same time, a flat cylindrical floating motion suppression structure is installed under the main column of each platform. When the waves and tides act, the marine structure will be subjected to a large horizontal thrust, causing the overall structure of the system to tilt. The huge effective area of ​​the floating motion suppression structure allows it to contact a larger sea surface in this process, thereby generating a larger restoring force, reducing the motion response of the system device under wave and tidal loads, making it more stable and safe.

[0020] 4. This scheme arranges the temperature difference energy generation system inside the foundation by utilizing the characteristic that the center of gravity of the single-column floating foundation is lower than the center of buoyancy. The heavier devices, such as the condensing device and the evaporating device, are set at the bottom of the foundation to reduce the use of the original weight materials, reduce costs, and improve the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0022] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is a partial schematic diagram of the energy and fresh water integrated platform of the present invention; Figure 3 It is a partial left view of the energy and fresh water integrated platform of the present invention; Figure 4 It is a partial front view of the energy and fresh water integrated platform of the present invention; Figure 5 A partial top view of the energy and fresh water integrated platform of the present invention; Figure 6 It is a vertical cross-sectional view of a single-column floating foundation of the present invention; Figure 7 It is a schematic diagram of the overall working process of the system of the present invention; Figure 8 It is a schematic diagram of the working process of the temperature difference energy power generation system of the present invention.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1- Wind power generation system, 2- Energy and freshwater integrated platform, 3- Single column floating foundation, 4- Anchor chain tensioning device, 5- Mooring anchor chain, 6- Anchoring device; 201- Platform deck, 202- Platform railing, 203- Mooring device, 204- Platform access device, 205- Floating body motion suppression structure, 206- Platform main column, 207- Horizontal connecting rod 1, 208- Oblique connecting rod, 209- Horizontal connecting rod 2, 210- Access entrance, 701- Methanol production device, 702- Electrolysis of water hydrogen production device, 703- Seawater desalination device, 704- Methanol storage device , 705-fresh water storage device, 706-fresh water supply device, 707-methanol supply device, 801-warm seawater inlet, 802-transition tank, 803-temperature difference energy power generation cabin, 804-liquid-gas conversion cabin, 805-gas-liquid conversion cabin, 806-cold seawater inlet, 807-ballast tank, 808-cold seawater discharge port, 809-warm seawater discharge port, 810-cabin internal reinforcement ring plate, 811-cabin reinforcement rib plate, 812-cabin partition plate, 901-condensing device, 902-evaporating device, 903-turbine generator, 904-seawater storage and distribution device. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Example 1: Figure 1-Figure 8As shown, a deep-sea floating wind power-temperature difference energy comprehensive utilization system comprises: a single-column floating foundation 3 fixed on the seabed, a wind power generation system 1 is fixedly connected to the top of the single-column floating foundation 3, a plurality of groups of anchor chain tensioning devices 4 are arranged on the outer side of the single-column floating foundation 3, the anchor chain tensioning devices 4 are fixedly connected to the anchor device 6 through the mooring anchor chain 5, the wind power generation system 1 is surrounded by an energy and fresh water integrated platform 2 at a certain distance above the sea level, and the wind power generation system 1 converts the wind energy on the sea surface into electrical energy through a wind turbine generator set, and then transmits it to the lower energy and fresh water integrated platform 2 through a cable. The energy and fresh water integrated platform 2 comprises a platform deck 201 arranged at the bottom of the tower in the wind power generation system 1, the edge of the platform deck 201 is protected by a platform railing 202, the surface of the platform deck 201 is provided with a boarding entrance 210, a methanol production device 701, a water electrolysis hydrogen production device 702, a seawater desalination device 703, a methanol storage device 704, a fresh water storage device 705, a fresh water supply device 706, and a methanol supply device 707, and a plurality of platform main columns 206 are arranged below the platform deck 201, and the platform main columns 206 are fixedly connected to the wind power generation system 1 through a horizontal connecting rod 1 207, an oblique connecting rod 208 and a horizontal connecting rod 209, and a floating body motion suppression structure 205 is also arranged at the bottom of the platform main column 206. Among them, the boarding entrance 210 is arranged between adjacent platform main columns 206, and a berthing device 203 and a platform boarding device 204 are arranged below it.

[0026] As a better implementation method, the energy and fresh water integrated platform can be a triangular floating platform located near the sea surface, which saves the cost of structural manufacturing and installation to a greater extent compared with the traditional square platform. Considering that there are many devices arranged on the upper part of the platform, three platform main columns are set under the triangular platform to provide greater buoyancy support. The three platform main columns are located below the apex of the triangle and are hollow cylindrical. Steel guardrails are set along the outer edge of the platform to protect the safety of maintenance and operation personnel.

[0027] In this embodiment, an energy and fresh water integrated platform 2 is set up near the sea surface, integrating the functions of hydrogen production, methanol production, seawater desalination, energy storage and water storage, etc., and can provide green fuel and fresh water supply for ships, avoiding the high cost of transporting water from deep sea to the shore over long distances.

[0028] The seawater desalination device 703 uses the electricity generated by the wind power generation system and the temperature difference energy generation system to desalinate the seawater. After the seawater desalination treatment, part of the fresh water enters the fresh water storage device 705 for ship fresh water replenishment, and the other part of the fresh water enters the electrolysis water hydrogen production device 702 for the green electricity hydrogen production process. The hydrogen produced by the electrolysis water hydrogen production device 702 will enter the methanol production device 701 to generate finished methanol, and the finished methanol will be transported to the methanol storage device 704. The ship can replenish fresh water and methanol through the fresh water supply device 706 and the methanol supply device 707.

[0029] Platform columns are also set up on the energy and freshwater integrated platform to provide greater buoyancy support and improve the overall stability of the system. At the same time, a flat cylindrical floating motion suppression structure is set under the main column of each platform. When the waves and tides act, the marine structure will be subjected to a large horizontal thrust, causing the overall structure of the system to tilt. The huge effective area of ​​the floating motion suppression structure allows it to contact a larger sea surface in this process, thereby generating a larger restoring force, reducing the motion response of the system device under wave and tidal loads, making it more stable and safe. A berthing device and a platform landing device are set below the landing entrance, which can facilitate the berthing of operation and maintenance and supply ships and the landing of related operators on the platform.

[0030] Example 2: Figure 1-Figure 8 As shown, a deep-sea floating wind power-temperature difference energy comprehensive utilization system comprises: a single-column floating foundation 3 fixed on the seabed, a wind power generation system 1 is fixedly connected to the top of the single-column floating foundation 3, a plurality of anchor chain tensioning devices 4 are arranged on the outside of the single-column floating foundation 3, and the anchor chain tensioning devices 4 are fixedly connected to the anchor device 6 through the mooring anchor chain 5, and the wind power generation system 1 is surrounded by an energy and fresh water integrated platform 2 at a certain distance above the sea level. The single-column floating foundation 3 is in the form of a cylinder with an internal cavity, and the single-column floating foundation 3 is divided from top to bottom by a cabin partition plate 812 into a transition cabin 802, a temperature difference energy generation cabin 803, a liquid-gas conversion cabin 804, a gas-liquid conversion cabin 805 and a ballast cabin 807, and a warm seawater inlet 801 is arranged 2m below the lowest tide level of the single-column floating foundation 3, and a cold seawater inlet 806 is arranged at the bottom. The transition cabin 802 is provided with a seawater storage and distribution device 904, the temperature difference energy power generation cabin 803 is provided with a turbine generator 903, the liquid-gas conversion cabin 804 is provided with an evaporation device 902, and the gas-liquid conversion cabin 805 is provided with a condensation device 901. The partition plate 812 is provided with a plurality of cabin reinforcement ribs 811 above and below, and a cabin reinforcement ring plate 810 is provided in the middle of the cabin.

[0031] The condensing device 901 is provided with a cold seawater discharge port 808 , and the evaporating device 902 is provided with a warm seawater discharge port 809 .

[0032] In this embodiment, the interior of the single-column floating foundation 3 is a large-diameter hollow cylinder with a length of 100 meters, and the internal space is used to arrange the temperature difference energy power generation system. A warm seawater inlet 801 is set 2m below the lowest tide level of the single-column floating foundation 3 for extracting warm seawater from the temperature difference energy power generation system, and a cold seawater inlet 806 is set at the bottom for extracting cold seawater from the temperature difference energy power generation system. There are multiple cabin reinforcement ribs 811 above and below each partition of the single-column floating foundation 3. In order to prevent the local instability problem caused by the excessive length of each cabin, an in-cabin reinforcement ring plate 810 is set in the middle of the cabin.

[0033] A seawater storage and distribution device 904 is provided in the transition cabin 802. The device is provided with a water pump, a tank and other structures. Warm seawater can be pumped into the tank through the warm seawater inlet, and then distributed through the distribution pipeline. A part of the seawater will be introduced into the liquid-gas conversion cabin 804 for the working fluid to evaporate and absorb heat, and the other part of the seawater will be transported to the seawater desalination device 703 of the energy and freshwater integrated platform 2 for seawater desalination. A turbine generator is installed in the temperature difference energy power generation cabin 803, which can be driven by the working fluid steam to generate electricity. The generated electricity is transmitted to the energy and freshwater integrated platform through cables for energy use such as seawater desalination, water electrolysis to produce hydrogen, and methanol production.

[0034] The evaporation device is arranged in the liquid-gas conversion cabin 804. The device uses the heat exchange principle to transfer the heat energy in the warm seawater to the working fluid to evaporate it into gas. The gas is then transported to the upper temperature difference energy power generation cabin 803 to drive the turbine to rotate and drive the generator to generate electricity. The gas after passing through the generator will flow to the gas-liquid conversion cabin 805. The warm seawater discharge port 809 is set on the wall of the liquid-gas conversion cabin 805, and the seawater after passing through the evaporation device can be discharged from here to the ocean.

[0035] The working fluid is a low boiling point fluid, such as ammonia (NH3), carbon dioxide (CO2), propane, etc.

[0036] A condensing device is installed in the gas-liquid conversion cabin 805. The device absorbs the heat in the working fluid vapor through the cold seawater in the deep, thereby condensing it into liquid, and then transporting it to the evaporation device for recycling. A cold seawater discharge port is set on the wall of the gas-liquid conversion cabin 805, and the seawater after passing through the condensing device can be discharged from here to the ocean.

[0037] In summary, if Figure 8The figure shows a schematic diagram of the principle of the temperature difference energy power generation system. The working process of the temperature difference energy power generation is as follows: first, the warm seawater is pumped into the seawater storage and distribution device 904 from the warm seawater inlet 801, and a part of the seawater is distributed by the device into the evaporation device 902 (the other part is transported to the seawater desalination device 703). The temperature of the warm seawater is higher than the boiling point of the working fluid in the evaporation device 902, which will cause the working fluid to be converted from a liquid state to a steam state, and then the steam is transported to the turbine generator 903. The steam is used to drive the generator to obtain electrical energy, thereby converting the temperature difference energy into electrical energy. The working fluid steam passing through the turbine generator 903 will be transported to the condensation device 901, and the cold seawater is pumped into the condensation device 901 as a coolant to absorb the remaining temperature of the working fluid steam, so that it is converted from a steam state to a liquid state and then transported to the evaporator, and the working fluid forms a cycle. After passing through the evaporation device 902, the warm seawater will be discharged from the warm seawater discharge port 809. After passing through the condensation device 901, the cold seawater will be discharged from the cold seawater discharge port 808.

[0038] The ballast tank 807 is a gravity-stabilized structure of the single-column floating foundation 3, and a large amount of sand, gravel, water, or concrete is filled inside the ballast tank to give it a large gravity. No or relatively light devices are arranged on the top of the foundation, and relatively heavy evaporation devices 902 and condensation devices 901 are arranged on the bottom, so that the overall center of gravity of the foundation is lower than the center of buoyancy, thereby increasing the stability of the foundation.

[0039] Three groups of anchor chain tensioning devices 4 are arranged outside the single-column floating foundation 3, each of which is connected to three anchoring devices 6 through three groups of mooring anchor chains 5. The anchor chain tensioning devices 4 can tension and relax the mooring anchor chains 5 so that the horizontal position of the single-column floating foundation 3 does not change. The mooring anchor chains 5 can be moored by gravity catenary, and the anchoring devices 6 are fixed to the seabed by suction anchors.

[0040] This embodiment uses the characteristic that the application water depth conditions of the single-column floating foundation are highly compatible with the temperature difference energy development environment to organically integrate the two, thereby superimposing the benefits of wind power generation and temperature difference energy generation. By utilizing the gains brought by the development of temperature difference energy, the overall cost of the system is reduced, and the efficient development and utilization of deep-sea ocean energy is realized.

[0041] The above specific embodiments are preferred embodiments of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the present specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of the present invention are within the protection scope of the present invention.

Claims

1. A deep sea floating wind power-temperature difference energy comprehensive utilization system, characterized by: The invention comprises a single-column floating foundation (3) fixed on the seabed, wherein a wind power generation system (1) is fixedly connected to the top of the single-column floating foundation (3), and a plurality of groups of anchor chain tensioning devices (4) are arranged outside the single-column floating foundation (3), wherein the anchor chain tensioning devices (4) are fixedly connected to an anchoring device (6) via a mooring anchor chain (5), and an energy and fresh water integrated platform (2) is arranged around the wind power generation system (1) at a certain distance above the sea level.

2. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 1 is characterized in that: The wind power generation system (1) converts wind energy on the sea surface into electrical energy through a wind turbine generator set, and then transmits the electrical energy to the lower energy and freshwater integrated platform (2) through cables.

3. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 1 is characterized in that: The energy and fresh water integrated platform (2) comprises a platform deck (201) arranged at the bottom of a tower in a wind power generation system (1); the edge of the platform deck (201) is protected by a platform railing (202); the surface of the platform deck (201) is provided with a landing entrance (210), a methanol production device (701), a water electrolysis hydrogen production device (702), a seawater desalination device (703), a methanol storage device (704), a fresh water storage device (705), a fresh water supply device (706), and a methanol supply device (707); a plurality of platform main columns (206) are arranged below the platform deck (201); the platform main columns (206) are fixedly connected to the wind power generation system (1) by means of a horizontal connecting rod 1 (207), an oblique connecting rod (208), and a horizontal connecting rod 2 (209); and a floating body motion suppression structure (205) is also arranged at the bottom of the platform main column (206).

4. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 3 is characterized in that: A mooring device (203) and a platform landing device (204) are provided below the landing entrance (210).

5. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 4 is characterized in that: The boarding entrance (210) is arranged between adjacent platform main columns (206).

6. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 1, characterized in that: The single-column floating foundation (3) is in the form of a cylinder with an internal cavity. The single-column floating foundation (3) is divided from top to bottom by a cabin partition plate (812) into a transition cabin (802), a temperature difference energy power generation cabin (803), a liquid-gas conversion cabin (804), a gas-liquid conversion cabin (805) and a ballast cabin (807). The single-column floating foundation (3) is provided with a warm seawater inlet (801) 2 m below the lowest tide level, and a cold seawater inlet (806) is provided at the bottom.

7. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 6 is characterized in that: The transition cabin (802) is provided with a seawater storage and distribution device (904), the temperature difference energy power generation cabin (803) is provided with a turbine generator (903), the liquid-gas conversion cabin (804) is provided with an evaporation device (902), and the gas-liquid conversion cabin (805) is provided with a condensation device (901).

8. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 6 is characterized in that: A plurality of cabin reinforcement ribs (811) are arranged above and below the partition plate (812), and an in-cabin reinforcement ring plate (810) is arranged in the middle of the cabin.

9. The deep sea floating wind power-temperature difference energy comprehensive utilization system according to claim 7, characterized in that: The condensing device (901) is provided with a cold seawater discharge port (808), and the evaporating device (902) is provided with a warm seawater discharge port (809).

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