WIND ENERGY-WAVE ENERGY-TIDAL ENERGY INTEGRATED POWER GENERATION SYSTEM BASED ON MONOPILE FOUNDATION

Abstract

A wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation, in which the wind energy, wave energy and tidal energy will share the support structure and power transmission system, belongs to the technical field of ocean renewable energy utilization. An integrated power generation system which integrates wind energy converter, oscillating water column wave energy converter and horizontal-axis tidal energy converter is established based on the monopile support structure. The invention makes sufficient use of offshore renewable resources, so as to improve the utilization ratio of monopile foundation and reduce the total cost of power generation of integrated system. The novel integrated power generation system improves the effective utilization of the ocean areas, reduces the cost of construction and maintenance, makes full use of the existing mature wind energy technology, and promotes the commercialization of wave energy converters and tidal energy devices.

Claims

1. A wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation, which is a power generation system integrating wind turbine, oscillating water column wave energy as well as horizontal-axis tidal energy based on monopile foundation, wherein the wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation comprising a monopile-type wind turbine system, an oscillating water column wave energy converter and a horizontal axis tidal energy converter, as well as a wave energy converter at mean sea level around the monopile and a tidal energy converter below mean sea level underwater; the monopile-type wind turbine system comprises wind turbine, tower, monopile foundation and power transmission system; the wind turbine is connected to the monopile foundation through the tower; the monopile foundation is fixed to seabed; the oscillating water column wave energy converter is fixed onto the monopile foundation through first sleeve; the horizontal axis tidal energy converter comprises outrigger structure and tidal energy generator; two tidal energy generator are installed at the two ends of outrigger structure, the center of the outrigger structure is connected to the monopile foundation by second sleeve, by adjusting the plane of the structure, the axial direction of the tidal energy generator is consistent with the direction of the incoming flow; the oscillating water column wave energy converter comprises a cover body of the wave energy converter, wave inlet, air chamber, and an air turbine generator; the air chamber is located inside of the cover body; the wave inlet is set up at one side of the wave energy converter; the air turbine generator are installed at the two air outlets respectively which are at the top of the wave energy converter; when the wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation starts to work, the system is put into the water, under the action of waves, the water enter into the air chamber through the wave inlet to form an oscillating water column that oscillates in vertical direction, the oscillating water column moves up and down so that the air in the air chamber reciprocates through the air outlet at the top of the air chamber, and then drives the air turbine generator to generate electricity.

2. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 1, wherein using the conical air chamber to make sure the increasing of pressure at the end of the air flow so that the air flow could drive the air turbine generator to rotate faster and the power generation efficiency is improved.

3. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 1, wherein the wave inlet is in the same direction as the dominant direction of the wave to improve the conversion efficiency.

4. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 1, wherein the air turbine generators is dual-direction air turbine generator.

5. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 3, wherein the air turbine generators is dual-direction air turbine generator.

6. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 1, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

7. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 3, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

8. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 4, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

9. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 2, wherein the wave inlet is in the same direction as the dominant direction of the wave to improve the conversion efficiency.

10. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 2, wherein the air turbine generators is dual-direction air turbine generator.

11. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 2, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

12. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 5, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

13. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 9, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

14. The wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation according to claim 10, wherein the wind turbine is a MW scale horizontal axis wind turbine, and the tidal energy generator is a horizontal axis tidal energy converter.

Description

DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is the structural chart of wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation of the invention.

[0020] FIG. 2 is the side view of wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation of the invention.

[0021] FIG. 3 is the local top view of wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation of the invention.

[0022] where: 1 wind turbine; 2 tower; 3 first sleeve; 4 oscillating water column wave energy converter; 5 mean sea level; 6 monopile foundation; 7 seabed; 8 wave inlet; 9 oscillating water column; 10 air chamber; 11 air turbine generator; 12 tidal energy generator; 13 second sleeve; 14 outrigger structure.

DETAILED DESCRIPTION

[0023] For further understand the invention, based on the drawings and technical solution, the present invention will be further described as below:

[0024] FIGS. 1 and 2 show the embodiment of the wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation of the invention of the present invention.

[0025] As shown in FIG. 1, horizontal axis wind turbine 1 is connected to the monopile foundation 6 and seabed 7 by tower 2. Wave energy generation device is an oscillating water column wave energy converter 4 which is located near the mean sea level around the monopile foundation 6 and fixed to the monopile foundation 6 by the first sleeve 3. The first sleeve 3 aims to protect the monopile foundation 6. The two tidal energy generator 12 are installed at the two ends of the outrigger structure 14. The center of the outrigger structure 14 is connected to the monopile foundation 6 by the second sleeve 13. By adjusting the plane of the structure, the axial direction of the tidal energy generator 12 is consistent with the direction of the incoming flow. The wind turbine 1 performs a rotary motion under the driving of the wind flow, converts the wind energy into mechanical energy, and then drives the wind turbine 1 to generate electricity through the gear box. On the other hand, the oscillating water column 9 in the oscillating water column wave energy converter 4 reciprocates under the action of an external force of wave undulation, and is converted into a reciprocating motion of the air in the air chamber 10, thereby driving the air turbine generator 11 to generate electricity. If the dual-direction air turbine generator is used, the whole wave moves up and down can be used for the power generation, with good continuity and high efficiency. Tidal energy generators 12 are set at the two ends of the outrigger structure. The central position of the outrigger structure 14 is connected to the monopile foundation 6 through the second sleeve 13. By adjusting the plane of the structure, the axial direction of the tidal energy generator 12 is consistent with the direction of the incoming flow.

[0026] The process is: the wind turbine 1 driven by wind flow will produce the electricity; oscillating water column wave energy converter 4 is fixed to monopile foundation 6 through the first sleeve 3. The wave rising up to the wave inlet 8 gets into oscillating water column wave energy converter 4. The oscillating water column 9, which oscillates in vertical direction, pushes the air in air chamber 10 to pass through the air outlet back and forth to drive the air turbine generator 11 to generate electricity. Two symmetric tidal energy generator 12 rotate under the action of incoming water flow to generate electricity. The electricity from wind energy, wave energy and tidal energy will be collected and transmitted to the user by the transmission system.

[0027] The installation process is given as follows: First, the monopile foundation 6 is installed into the seabed by using existing offshore wind turbine installation technology. Then the sleeve is installed on the monopile foundation 6. The outrigger structure 14, tidal energy generator 12 and oscillating water column wave energy converter 4 which have been assembled onshore will be delivered and installed to the sleeve by the professional installation vessel. At last, the tower 2 and the wind turbine at the top are installed. So the whole construction process will be completed.

[0028] Accordingly, the present invention take use of the monopile foundation support structure which is easy to manufacture, install and constructed with low cost. Wind power generation, wave power generation and tidal power generation will be installed on the same support structure and share the platform and the power transmission system. Thus the power generation cost will be reduced significantly. The stable and reasonable structure further demonstrates that the invention is practical and has significant technical effect.