CN116039860A - Load-reducing and rolling-reducing wind energy-wave energy complementary power generation floating platform - Google Patents
Load-reducing and rolling-reducing wind energy-wave energy complementary power generation floating platform Download PDFInfo
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- CN116039860A CN116039860A CN202310072538.2A CN202310072538A CN116039860A CN 116039860 A CN116039860 A CN 116039860A CN 202310072538 A CN202310072538 A CN 202310072538A CN 116039860 A CN116039860 A CN 116039860A
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- wave energy
- power generation
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- floating platform
- reducing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/22—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the flow of water resulting from wave movements to drive a motor or turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/442—Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
Abstract
The invention discloses a load-reducing and vibration-reducing wind energy-wave energy complementary power generation floating platform, which relates to the technical field of wave power generation and marine equipment, and specifically comprises a main body structure, a vertical axis fan module and an oscillating water column type wave energy device, wherein the main body structure is connected with a seabed anchoring structure through an anchor chain, the main body structure comprises an upper truss and a bottom truss, the upper truss and the bottom truss are connected through round upright posts, two adjacent round upright posts are connected through side truss, and an oscillating water column type wave energy device is arranged in an inner cavity of each round upright post. According to the load-reducing and vibration-reducing wind energy-wave energy complementary power generation floating platform, wave energy and wind energy are ingeniously combined by the floating platform, ocean renewable energy capture is achieved in a high-efficiency and low-cost mode, independent oscillating water column wave energy capture devices are arranged in each round upright post, when wave energy is extracted, motion response of the platform is reduced, and stability and wave resistance of the platform are improved.
Description
Technical Field
The invention relates to the technical field of wave power generation and ocean equipment, in particular to a load-reducing and rolling-reducing wind energy-wave energy complementary power generation floating platform.
Background
With the exhaustion of global fossil energy, humans face a serious energy crisis and the emission of pollutants causes serious environmental and climate problems. Therefore, the development of renewable energy sources is the best choice for solving energy and environmental problems, which is also one of the common strategies adopted by various countries. Wind power generation is the renewable energy source with the largest large-scale industrialized development prospect at present, and offshore wind power becomes a new direction of international wind power development and is concerned by various countries. With the gradual saturation of the utilization of wind power on landing, the proportion of the wind power on the sea in the whole energy framework rises year by year, and the development of the wind power on the sea has important significance for the energy structure adjustment and sustainable development of China. Floating wind turbine technologies suitable for offshore environments are also of increasing interest because of the richer and more stable wind energy resources available offshore than onshore.
The floating type wind turbine on the sea belongs to a high-rise ocean structure with larger top concentrated mass, the slight movement of a floating foundation can cause the intense movement of the wind turbine, the integral stable operation is not facilitated, and how to improve the stability of the floating type wind turbine is the key of the development of the floating type wind turbine.
The sea is reserved with huge wave energy resources, the development of wave energy is one of the current research hotspots, the wave energy utilization technology is mature, but the conversion rate of the wave energy power generation device is lower, the unit power generation cost is higher, and the industrialized application of the wave energy power generation device is limited. The offshore wind power development and the wave energy resource utilization are combined, so that the power generation capacity of an offshore wind farm can be effectively improved, and the reliability and the safety of the floating fan can be improved through the wave energy device. The method for utilizing wind energy and wave energy in a complementary way is an effective way for comprehensively utilizing renewable energy sources in the ocean.
The invention designs a load-reducing and vibration-reducing floating wind energy-wave energy integrated platform, which skillfully combines the platform structural design with the wave energy and wind energy power generation device, and achieves a power generation system with high efficiency, low cost, safety and reliability.
Disclosure of Invention
The invention provides a wind energy-wave energy complementary power generation floating platform capable of reducing load and reducing vibration, which solves the problems of insufficient vibration reducing technology, poor wave resistance and the like of the existing floating platform in the prior art.
The invention provides the following technical scheme: a wind energy-wave energy complementary power generation floating platform capable of reducing load and vibration adopts a semi-submersible platform foundation, a truss type supporting structure adopted by the platform has good wave transmissivity, motion response of the platform can be reduced, each pile leg of the platform is embedded with an oscillating water column type wave energy device, the oscillating water column type wave energy device mainly comprises an air chamber, an air hole and a turbine power generation device, the oscillating water column type wave energy device is vertically distributed along space, air in the air chamber is extruded under oscillation of waves in the air chamber, a turbine is enabled to rotate to apply work, wave energy is converted into mechanical energy, wave load borne by the pile legs is effectively reduced, the effect of reducing load and vibration of the platform is achieved, the wave energy device can be integrated into a power grid, and wave energy extraction is achieved.
The utility model provides a wind energy-wave energy complementary power generation floating platform of reducing load and reducing vibration, includes main structure, vertical axis fan module and vibration water column formula wave energy device, main structure passes through the anchor chain and links to each other with submarine anchor structure, main structure includes upper portion truss and bottom truss, upper portion truss and bottom truss pass through the circle stand and connect, and two adjacent circle stands pass through the side truss and connect, be equipped with vibration water column formula wave energy device in the inner chamber of circle stand, the bottom of circle stand is all fixedly connected with transmission plate structure, the middle part of transmission plate structure is equipped with circular opening;
the bottom of the vertical axis fan module is fixedly connected with the middle part of the top of a circular column;
the oscillating water column type wave energy device comprises an air chamber, a turbine power generation device and air holes, wherein the turbine power generation device is arranged at the top end of an inner cavity of the air chamber, and the air holes are formed in the top of the inner cavity of the air chamber; the circular opening is concentric with the air chamber.
Preferably, the outer ring of the transmission plate structure is uniformly provided with mounting holes, and the outer diameter of the transmission plate structure is larger than the inner diameter of the air chamber.
Preferably, the air chamber and the air hole are concentric with the circular column, and the inner diameter of the air chamber is larger than that of the air hole.
Preferably, the number of the round posts is three, and the three round posts are distributed in a triangular shape.
Preferably, the anchor chains are fixedly connected with the outer surface of the round upright post, and the directions of the two adjacent anchor chains are different.
Preferably, the turbine generator is located above the water surface.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the load-reducing and vibration-reducing wind energy-wave energy complementary power generation floating platform, wave energy and wind energy are ingeniously combined by the floating platform, ocean renewable energy capture is achieved in a high-efficiency and low-cost mode, independent oscillating water column wave energy capture devices are arranged in each round upright post, when wave energy is extracted, motion response of the platform is reduced, and stability and wave resistance of the platform are improved.
2. The wind energy-wave energy complementary power generation floating platform capable of reducing load and reducing vibration can reduce the motion response of the platform and increase the stability of the platform while the work of the wave energy device is not influenced by the arrangement of the transmission plate structure arranged at the bottom of the platform (at the opening of the air chamber), and the transmission plate structure can be applied to floating fans with other structural forms.
Drawings
FIG. 1 is a schematic diagram of a wind and wave energy complementary power generation floating platform with load and roll reduction.
FIG. 2 is a schematic cross-sectional view of a second circular post and a second bottom transmissive plate.
Fig. 3 is a schematic cross-sectional view of a second bottom transmissive plate.
In the figure: 1. an upper truss; 2. a round column I; 3. a second round column; 4. a round column III; 8. a vertical axis fan module; 9. a first bottom transmissive plate; 10. a second bottom transmissive plate; 11. a third bottom transmissive plate; 12. air holes; 13. a turbine power generation device; 14. a gas chamber; 15. a mounting hole; 16. a dotted line; 17. a first anchor chain; 18. a second anchor chain; 19. a third anchor chain; 20. and a fourth anchor chain.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a load-reducing and vibration-reducing wind energy-wave energy complementary power generation floating platform which comprises a main body structure, a vertical axis fan module 8 and an oscillating water column type wave energy device.
The invention is applied to deep sea areas, the semi-submersible platform foundation is adopted, the main body structure of the platform adopts a truss type supporting structure, the wave transmissivity is good, and the motion response of the platform can be reduced.
The major structure includes upper portion truss 1 and bottom truss, and upper portion truss 1 and bottom truss are connected through the circle stand, and the circle stand has three in this application, and three circle stand is triangle-shaped distribution state, and two adjacent circle stands are connected through the side truss, and in this application three circle stand is recorded respectively and is done circle stand one 2, circle stand two 3 and circle stand three 4.
As can be seen from the above description, the truss and the round column form the main structure of the platform, so that the platform has better wave transmissivity, and the motion response of the platform can be reduced, so that the platform has better wave endurance and stability.
The anchoring system of the platform mainly comprises four anchor chains, wherein the four anchor chains are a first anchor chain 17, a second anchor chain 18, a third anchor chain 19 and a fourth anchor chain 20, the anchor chains are connected with a submarine anchoring structure, the movement of the platform is limited within a certain range, the anchor chains are fixedly connected with the outer surface of a round upright post, and the anchoring directions of two adjacent anchor chains are different.
The middle part at the top of the second round upright post 3 is fixedly connected with a vertical axis fan module 8, blades of a fan in the vertical axis fan module 8 start to rotate and provide wind energy under the action of wind load, and a wind driven generator generates electric power under the rotation action of the blades and stores the electric power in an electric power storage system or directly transmits the electric power to a near-shore power station through a power grid.
For the oscillating water column type wave energy device, the oscillating water column type wave energy device is arranged in each pile leg of the platform, namely, oscillating water column type wave energy devices are arranged in the inner cavities of the round column I2, the round column II 3 and the round column III 4.
The oscillating water column type wave energy device mainly comprises an air chamber 14, an air hole 12 and a turbine power generation device 13, and the air chamber, the air hole 12 and the turbine power generation device are vertically distributed along the space. The air chamber 14 is a hollow cavity structure concentric with the pile leg, an air hole 12 with a certain size is arranged at the upper part of the air chamber 14 and is used as an air flow inlet and outlet, and the inner diameter of the air chamber 14 is larger than the inner diameter of the air hole 12. The oscillating water column type wave energy device takes air in the air chamber 14 as an intermediate carrier for energy conversion, the turbine power generation device 13 is positioned above the water surface, the problems of seawater corrosion, marine organism adhesion and the like are effectively avoided, the reliability and stability of a mechanical unit are ensured, and the additional maintenance cost is reduced. Under the oscillation of waves in the air chamber 14, the air in the air chamber 14 is extruded, so that the turbine rotates to do work, wave energy is converted into mechanical energy, wave load borne by pile legs is effectively reduced, and the effect of reducing load and vibration of the platform is realized. And the wave energy device can be integrated into a power grid to realize wave energy extraction.
The bottom of the air chamber 14 of the oscillating water column type wave energy device is provided with a transmission plate structure, so that the motion response and the load applied to the floating platform can be reduced while the extraction of the wave energy device is not influenced, and the extraction efficiency of wave energy and wind energy is greatly improved. The structure of the transmission plate is disc-shaped, and the circular opening is formed in the plate so that seawater can enter the air chamber 14, and the energy capture of the wave energy device is hardly affected.
The transmission plate structure can increase the additional damping of the integrated platform, and improves the overall stability of the platform. The energy extraction efficiency of the integrated platform is ensured, the loss of mooring systems such as anchor chains, anchoring devices and the like is reduced, the maintenance cost is reduced, and the service life is prolonged.
The outer lane of transmission plate structure evenly is equipped with mounting hole 15, through the setting of mounting hole 15, can be with transmission plate structure and the bottom fixed connection of the circle stand of this platform, transmission plate structure has three this moment, and three transmission plate structure is recorded respectively as first bottom transmission plate 9, second bottom transmission plate 10 and third bottom transmission plate 11, and the cross-section view of transmission plate structure is as shown in fig. 3, and the position of air chamber inner boundary is broken line 16 departments.
To sum up: when the load-reducing and anti-rolling wind energy-wave energy complementary power generation floating platform is used, under the action of waves, the water column in the air chamber 14 oscillates up and down to force air in the air chamber to form air flow which flows up and down in a reciprocating manner at the ventilation pipeline. The high-speed flowing gas pushes the turbine power generation device 13 in the air hole to rotate, so that wave energy is converted into mechanical energy, wave load borne by the pile legs is effectively consumed, and the effect of reducing load and vibration of the floating platform is achieved.
Standard parts used in the present invention can be purchased from the market, the special-shaped parts can be customized according to the descriptions of the specification and the drawings, the specific connection modes of the parts are conventional means such as bolts, rivets, welding and the like which are mature in the prior art, and the machines, the parts and the equipment are conventional models in the prior art, so that details which are not described in detail in the specification belong to the prior art which is well known to the person skilled in the art, and although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a wind energy-wave energy complementary electricity generation floating platform of roll reduction, includes major structure, vertical axis fan module (8) and vibration water column formula wave energy device, its characterized in that: the main body structure is connected with the submarine anchoring structure through an anchor chain and comprises an upper truss (1) and a bottom truss, wherein the upper truss (1) and the bottom truss are connected through round upright posts, two adjacent round upright posts are connected through side truss, an oscillating water column type wave energy device is arranged in an inner cavity of each round upright post, transmission plate structures are fixedly connected to the bottoms of the round upright posts, and round openings are formed in the middle of each transmission plate structure;
the bottom of the vertical axis fan module (8) is fixedly connected with the middle part of the top of a circular column;
the oscillating water column type wave energy device comprises an air chamber (14), a turbine power generation device (13) and air holes (12), wherein the top end of the inner cavity of the air chamber (14) is provided with the turbine power generation device (13), and the top of the inner cavity of the air chamber (14) is provided with the air holes (12); the circular opening is concentric with the air chamber (14).
2. The load and roll reducing wind-wave energy complementary power generation floating platform of claim 1, wherein: the outer ring of the transmission plate structure is uniformly provided with mounting holes (15), and the outer diameter of the transmission plate structure is larger than the inner diameter of the air chamber (14).
3. The load and roll reducing wind-wave energy complementary power generation floating platform of claim 1, wherein: the air chamber (14) and the air hole (12) are concentric with the circular column, and the inner diameter of the air chamber (14) is larger than the inner diameter of the air hole (12).
4. The load and roll reducing wind-wave energy complementary power generation floating platform of claim 1, wherein: the number of the round posts is three, and the three round posts are distributed in a triangular shape.
5. The load and roll reducing wind-wave energy complementary power generation floating platform of claim 1, wherein: the anchor chains are fixedly connected with the outer surface of the round upright post, and the directions of the two adjacent anchor chains are different.
6. The load and roll reducing wind-wave energy complementary power generation floating platform of claim 1, wherein: the turbine power generation device (13) is positioned above the water surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310072538.2A CN116039860A (en) | 2023-02-02 | 2023-02-02 | Load-reducing and rolling-reducing wind energy-wave energy complementary power generation floating platform |
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| CN202310072538.2A CN116039860A (en) | 2023-02-02 | 2023-02-02 | Load-reducing and rolling-reducing wind energy-wave energy complementary power generation floating platform |
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| CN116039860A true CN116039860A (en) | 2023-05-02 |
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| CN202310072538.2A Pending CN116039860A (en) | 2023-02-02 | 2023-02-02 | Load-reducing and rolling-reducing wind energy-wave energy complementary power generation floating platform |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014862A (en) * | 2016-05-19 | 2016-10-12 | 哈尔滨工程大学 | Novel floating type multi-floater wind-wave energy hybrid power generation device |
| CN109026542A (en) * | 2018-08-10 | 2018-12-18 | 浙江大学 | Floatation type wind energy-wave energy combined generating system |
| CN111412102A (en) * | 2020-03-27 | 2020-07-14 | 武汉理工大学 | Wind energy-wave energy integrated power generation platform based on semi-submersible floating fan and oscillating floater |
| CN112610426A (en) * | 2020-12-30 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Marine semi-submerged formula fan foundation and wind generating set |
| WO2022142415A1 (en) * | 2020-12-30 | 2022-07-07 | 华能国际电力股份有限公司江苏清洁能源分公司 | Semi-submersible offshore wind turbine unit, foundation and heave plate |
-
2023
- 2023-02-02 CN CN202310072538.2A patent/CN116039860A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014862A (en) * | 2016-05-19 | 2016-10-12 | 哈尔滨工程大学 | Novel floating type multi-floater wind-wave energy hybrid power generation device |
| CN109026542A (en) * | 2018-08-10 | 2018-12-18 | 浙江大学 | Floatation type wind energy-wave energy combined generating system |
| CN111412102A (en) * | 2020-03-27 | 2020-07-14 | 武汉理工大学 | Wind energy-wave energy integrated power generation platform based on semi-submersible floating fan and oscillating floater |
| CN112610426A (en) * | 2020-12-30 | 2021-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Marine semi-submerged formula fan foundation and wind generating set |
| WO2022142415A1 (en) * | 2020-12-30 | 2022-07-07 | 华能国际电力股份有限公司江苏清洁能源分公司 | Semi-submersible offshore wind turbine unit, foundation and heave plate |
Non-Patent Citations (1)
| Title |
|---|
| 刘振亚;张敏;杜君峰;: "环境荷载作用下海上浮式风电结构动力响应研究", 太阳能学报, no. 03, pages 55 - 61 * |
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