Novel floating breakwater-oscillating water column wave energy conversion device integrated system

Abstract

The invention discloses a novel floating breakwater-oscillating water column wave energy conversion device integrated system which comprises a breakwater assembly, the bottom of the breakwater assembly is fixed through an anchor chain, an air chamber is arranged in the breakwater assembly, the top of the air chamber is provided with an air hole pipeline, the air hole pipeline is connected with a turbine generator, and the turbine generator is connected with an oscillating water column wave energy conversion device. A permeable structure is fixed to the wave facing side of the breakwater assembly, and a gap is formed between the permeable structure and the breakwater assembly. A permeable structure, an oscillating water column wave energy device and a floating breakwater are integrated, the permeable structure is used for dissipating high-frequency short waves, reducing wave loads acting on the structure and improving the stability and survivability of the structure, and in order to improve the energy dissipation effect of the permeable structure, a certain distance is formed between the permeable structure and an air chamber structure; the OWC wave energy device is used for absorbing long-wave energy for power generation, and the blocking capacity of the integrated system to long waves is improved; through integration of the three, a basic platform is shared, sea area resources are saved, operation and maintenance cost is reduced, and diversification of functions of the integrated system is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of marine renewable energy conversion, and in particular to a novel floating breakwater-oscillating water column wave energy conversion device integrated system. Background Art

[0002] Wave energy, as a high-quality marine renewable energy source, boasts vast reserves and widespread distribution, offering broad application prospects. Currently, a variety of wave energy conversion devices have been developed. Among them, the oscillating water column (OWC) wave energy converter is recognized worldwide as one of the most advanced wave energy converters due to its simple structure and ease of maintenance. However, due to the relatively low maturity of wave energy technology, OWC devices also face the challenge of high costs.

[0003] Protecting marine engineering structures is crucial in marine development. Floating breakwaters are widely used for wave protection due to their high flexibility and environmental friendliness. While they offer excellent protection against short waves, they are less effective against long waves, which have a higher transmission capacity. OWC wave energy converters, on the other hand, are more effective at absorbing long waves. Given the structural similarities between OWC wave energy converters and floating breakwaters, and given their application in areas with relatively abundant wave energy, integrating OWC wave energy converters with floating breakwaters could not only reduce construction costs by sharing infrastructure but also enhance the breakwater's effectiveness in protecting against long waves through the absorption of long-wave energy by the wave energy converters.

[0004] Furthermore, as an offshore engineering structure, even after integrating OWC wave energy devices with breakwaters, they still face the challenge of wave loads. High-frequency, short-waves interacting with the integrated system typically generate significant high-frequency wave loads, threatening the safety of the structure. However, open-cell structures effectively dissipate wave energy and are widely used in caisson breakwaters and laboratory wave-breaking facilities.

[0005] Based on this, the present invention provides a novel integrated floating breakwater-oscillating water column wave energy conversion device system, which intends to scientifically integrate the open-hole structure, OWC wave energy device and floating breakwater. The open-hole structure dissipates the energy of high-frequency short waves, reducing the wave load acting on the integrated system. The OWC wave energy device's ability to absorb long waves is utilized to improve the floating breakwater's wave-dissipating effect on long waves. Through integration, infrastructure is shared and operation and maintenance costs are reduced. Summary of the Invention

[0006] The purpose of the present invention is to provide a new type of floating breakwater-oscillating water column wave energy conversion device integrated system, which can not only play the role of wave dissipation and embankment protection, but also can efficiently utilize wave energy to generate electricity, while also reducing the high-frequency wave load it is subjected to and improving its own survivability.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a novel integrated system of a floating breakwater and an oscillating water column wave energy conversion device, comprising a breakwater assembly, the bottom of which is fixed by an anchor chain, an air chamber being provided inside the breakwater assembly, an air hole pipe being provided on the top of the air chamber, the air hole pipe being connected to a turbine generator, and an air-permeable structure being fixed on the wave-facing side of the breakwater assembly, with a gap between the two.

[0009] Preferably, the breakwater assembly comprises a hollow rectangular box-shaped device with an open bottom, a partition is provided in the middle of the hollow rectangular box-shaped device with an open bottom, and the partition separates the hollow rectangular box-shaped device with an open bottom to form the air chamber.

[0010] Preferably, the width of the partition is greater than the width of the hollow rectangular box-shaped device with an opening at the bottom.

[0011] Preferably, the permeable structure is connected and fixed to the partition.

[0012] Preferably, the distance between the air-permeable structure and the hollow rectangular box-shaped device with an opening at the bottom is 1 / 4 of the width of the air chamber.

[0013] Preferably, a safety valve is provided on the top of the air chamber.

[0014] When waves encounter the above-mentioned new floating breakwater-oscillating water column wave energy conversion device integrated system, the first part of the wave energy is reflected and dissipated by the air-permeable structure, the second part of the wave energy is captured by the air chamber, and the third part of the wave energy is transmitted through the new floating breakwater-oscillating water column wave energy conversion device integrated system into the downstream; the water column in the air chamber oscillates up and down under the action of waves, compressing the air in the air chamber and generating reciprocating airflow in the air hole pipe, thereby driving the turbine generator to generate electricity.

[0015] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0016] The present invention provides a novel floating breakwater-oscillating water column wave energy conversion device integrated system, which integrates a hollow structure, an oscillating water column wave energy device and a floating breakwater. The hollow structure is used to dissipate high-frequency short waves, reduce the wave load acting on the structure, and improve the stability and survivability of the structure. In order to improve the energy dissipation effect of the hollow structure, a certain distance is set between the hollow structure and the air chamber structure; the OWC wave energy device is used to absorb long-wave energy to generate electricity, thereby improving the integrated system's ability to block long waves; through the integration of the three and the sharing of the basic platform, marine resources are saved and operation and maintenance costs are reduced, thereby realizing the diversification of the integrated system's functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of the novel floating breakwater-oscillating water column wave energy conversion device integrated system provided by the present invention;

[0019] Figure 2 A partial schematic diagram of a single air chamber in the novel floating breakwater-oscillating water column wave energy conversion device integrated system provided by the present invention;

[0020] In the figure: 1- air-permeable structure; 2- partition; 3- air chamber; 4- turbine generator; 5- anchor chain; 6- safety air valve. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a novel floating breakwater-oscillating water column wave energy conversion device integrated system to solve the problems existing in the prior art.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1:

[0025] This embodiment provides a novel floating breakwater-oscillating water column wave energy conversion device integrated system, such as Figure 1 and Figure 2As shown, it includes a breakwater assembly, and the breakwater structure is a floating breakwater. The bottom of the breakwater assembly is fixed by an anchor chain 5. An air chamber 3 is provided in the breakwater assembly. The air chamber 3 can be set to a suitable size according to the actual sea conditions so that the natural frequency domain of the water column in the air chamber 3 is close to the main wave frequency in the sea conditions, thereby improving the wave energy conversion efficiency. An air hole pipe is provided on the top of the air chamber 3, and the air hole pipe is connected to the turbine generator 4. An air-permeable structure 1 is fixed on the wave-facing side of the breakwater assembly, and there is a gap between the two. The air-permeable structure 1 is used to dissipate short-wave energy and reduce high-frequency short-wave loads. The gap between the two can ensure the energy capture efficiency of the air chamber and the load reduction effect of the air-permeable structure. If the distance is too close, the wave energy dissipation distance is insufficient, resulting in insufficient wave energy dissipation and unclear load reduction effect; and if the distance is too far, the wave energy will be excessively dissipated, which will reduce the wave energy capture efficiency.

[0026] As an embodiment, the breakwater assembly includes a hollow rectangular box-shaped device with an open bottom, and a partition 2 is provided in the middle of the hollow rectangular box-shaped device with an open bottom, and the partition 2 divides the hollow rectangular box-shaped device with an open bottom into an air chamber 3.

[0027] As an embodiment, the width of the partition 2 is greater than the width of the hollow rectangular box-shaped device with an opening at the bottom, that is, the wave-facing side of the partition 2 protrudes from the hollow rectangular box-shaped device with an opening at the bottom.

[0028] As an implementation method, the permeable structure 1 is connected and fixed to the partition 2, which can make the system more integrated.

[0029] As an implementation method, the distance between the air-permeable structure 1 and the hollow rectangular box-shaped device with an opening at the bottom is 1 / 4 of the width of the air chamber 3, which can achieve a better load reduction effect while minimizing the impact on the wave energy capture efficiency.

[0030] As an embodiment, a safety valve 6 is provided on the top of the air chamber 3, which is opened to release pressure under extreme sea conditions, thereby reducing the extreme load on the structure.

[0031] The present invention provides a novel integrated system of a floating breakwater-oscillating water column wave energy conversion device. When in use, a hollow rectangular box-shaped device with an opening at the bottom floats on the sea surface and is fixed with an anchor chain 5. Under the action of waves, the oscillating water column in the air chamber 3 oscillates up and down, forcing the gas inside the air chamber 3 to compress and expand. The reciprocating airflow drives the turbine generator 4 through the air hole pipe at the top of the air chamber 3 to generate electricity. When waves act on the air-permeable structure 1, a part of the wave energy, especially the high-frequency wave energy, will be dissipated. In order to prevent the internal pressure of the air chamber from being too high under extreme sea conditions, the safety air valve 6 on the top of the air chamber will open to release the pressure when the internal air pressure of the air chamber exceeds a certain threshold, thereby improving the survivability of the device.

[0032] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A novel floating breakwater-oscillating water column wave energy conversion device integrated system, characterized by: The invention comprises a breakwater component, the bottom of which is fixed by an anchor chain (5), an air chamber (3) is provided in the breakwater component, an air hole pipe is provided on the top of the air chamber (3), the air hole pipe is connected to a turbine generator (4), and a permeable structure (1) is fixed on the wave-facing side of the breakwater component, with a gap between the two.

2. The novel floating breakwater-oscillating water column wave energy conversion device integrated system according to claim 1 is characterized by: The breakwater assembly comprises a hollow rectangular box-shaped device with an open bottom, wherein a partition (2) is provided in the middle of the hollow rectangular box-shaped device with an open bottom, and the partition (2) separates the hollow rectangular box-shaped device with an open bottom to form the air chamber (3).

3. The novel floating breakwater-oscillating water column wave energy conversion device integrated system according to claim 2 is characterized by: The width of the partition (2) is greater than the width of the hollow rectangular box-shaped device with an opening at the bottom.

4. The novel floating breakwater-oscillating water column wave energy conversion device integrated system according to claim 2 is characterized by: The permeable structure (1) is connected and fixed to the partition (2).

5. The novel floating breakwater-oscillating water column wave energy conversion device integrated system according to claim 1 is characterized by: The distance between the air-permeable structure (1) and the bottom-open hollow rectangular box-shaped device is 1 / 4 of the width of the air chamber (3).

6. The novel floating breakwater-oscillating water column wave energy conversion device integrated system according to claim 1 is characterized by: A safety air valve (6) is provided on the top of the air chamber (3).

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