Pile foundation type offshore photovoltaic and wave energy device complementary power generation system

Abstract

The utility model discloses a pile foundation type offshore photovoltaic and wave energy device complementary power generation system, which comprises a photovoltaic panel, a concrete pile, a support frame, a support frame base, a box body and a turbine, the support frame is arranged at the upper part of the concrete pile, the photovoltaic panel is arranged on the support frame, the turbine is arranged at the top of the box body, the box body is arranged on the concrete pile, and the turbine is arranged at the bottom of the box body. The middle position of the box body is located below the water level. According to the combined power generation system, the photovoltaic panel is installed on the upper portion of the pile foundation support for power generation, meanwhile, the wave device is placed on the pile foundation, the space of the pile foundation can be effectively utilized, the power generation cost is reduced, and the power generation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of marine renewable energy utilization, and particularly relates to a pile foundation-formed offshore photovoltaic and wave energy device complementary power generation system. Background Art

[0002] Photovoltaic power generation, as an important new energy source, has made great progress in recent years. Pile-based photovoltaic is a common way to install photovoltaic power generation systems. The photovoltaic modules are installed on the pre-buried pile foundation, and the photovoltaic modules are fixed to the pile foundation through a fixed support frame to achieve the purpose of stable support. This installation method is simple to construct and has a reliable structure. It has been widely used in offshore areas. Pile-based offshore photovoltaic power stations need to be far away from the water surface, and the required pile foundation length is long. The utilization rate of the pile foundation space is low. Pile-based offshore photovoltaic power stations have higher construction and maintenance costs than traditional onshore photovoltaic power stations. How to effectively utilize the pile foundation space, reduce power generation costs, and improve power generation efficiency is a problem that needs to be solved. Utility Model Content

[0003] The utility model aims to address the deficiencies of the prior art and provides a power generation system which can reduce power generation costs and improve power generation efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A power generation system for offshore photovoltaic and wave energy devices in the form of pile foundation, comprising photovoltaic panels, concrete piles, photovoltaic support frames, and support frame bases, wherein the support frames are arranged on the upper part of the concrete piles, and the photovoltaic panels are mounted on the support frames;

[0006] It also includes a wave energy device, which includes a box and a turbine. The turbine is installed on the top of the box. A plurality of water inlet holes are provided on the box. The box is installed on the concrete pile, and the middle position of the box is located below the water level.

[0007] The utility model installs a photovoltaic panel on the upper part of the pile foundation support, and simultaneously installs a wave energy device on the pile foundation. This combined power generation system can effectively utilize the space of the pile foundation, reduce power generation costs, and improve power generation efficiency.

[0008] Furthermore, the box body comprises an inner wall, an outer wall, a top cover and a bottom, and the inner wall is connected to the concrete pile. The inner wall is connected to the concrete, so that the box body and the concrete pile are stably connected.

[0009] Furthermore, the water inlet is arranged at the bottom of the box, and seawater enters and exits the box from the water inlet at the bottom of the box. The up and down movement of the waves can push all the air in the box to generate reciprocating airflow, thereby driving the turbine to rotate, and the efficiency is higher than that when the water inlet is arranged at other positions of the box.

[0010] Furthermore, bolt holes are provided on the concrete piles, the inner wall of the box is connected to the concrete piles by bolts, and sealant is applied on the contact surface between the bolts and the bolt holes. This connection method is convenient for adjusting the position of the wave energy device, and applying sealant on the contact surface between the bolts and the bolt holes can prevent gas or liquid leakage in the box, thereby ensuring the power generation effect of the wave energy device.

[0011] Furthermore, the photovoltaic panel and the turbine are connected to the same inverter.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a power generation system that complements offshore photovoltaic and wave energy devices. Photovoltaic panels are installed on the upper part of pile foundation supports to generate electricity. At the same time, wave energy devices are installed on the pile foundations. The up and down movement of waves drives the air in the cavity to generate reciprocating airflow, thereby driving the turbine to rotate and converting mechanical energy into electrical energy. This combined power generation system can effectively utilize the space of the pile foundation at the waterline, reduce power generation costs, and improve power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structural front view of the utility model;

[0015] Figure 2 It is a side view of the overall structure of the utility model;

[0016] Figure 3 It is a cross-sectional view of the connection between the concrete column and the wave energy device of the utility model;

[0017] Figure 4 It is a bottom view of the wave energy device of the utility model.

[0018] In the figure: 1-photovoltaic panel, 2-concrete pile, 3-box, 31-inner wall, 32-outer wall, 33-top cover, 34-bottom, 4-turbine, 5-support frame, 6-bolt, 7-water inlet hole, 8-support frame base. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0020] Example

[0021] like Figure 1-Figure 4 In this embodiment, a pile foundation-based offshore photovoltaic and wave energy device complementary power generation system includes a photovoltaic panel 1, a concrete pile 2, a support frame 5, a bolt 6, a water inlet 7, a support frame base 8 and a wave energy device, and the wave energy device includes a box 3 and a turbine 4. The lower part of the concrete pile 2 is embedded in the seabed foundation for fixation, and a support frame 5 is placed on the upper part of the concrete 2 to fix the upper photovoltaic panel 1. By placing multiple concrete piles 2, the photovoltaic array distribution is realized.

[0022] More specifically, it is necessary to select appropriate construction methods according to the actual conditions of the sea area, such as bored pile machine construction, prefabricated pile sinking, etc. During the construction process, it is necessary to control the verticality of the pile foundation, the pile driving sequence and the pile driving speed to ensure the construction quality. Finally, concrete is poured into the pile hole to form a concrete pile 2. After the concrete pouring is completed, it needs to be maintained and quality tested in accordance with relevant regulations. Only after passing the inspection can the next step of construction be carried out.

[0023] More specifically, the support frame 5 is made of Q235, and the cross section is round steel. The cross section and material can also be customized as needed to meet the force requirements. The support frame base 8 is made of concrete, and the support frame 5 is connected to the concrete pile 2 to form strength. The cross section and material can also be customized as needed to meet the force requirements. The photovoltaic panel 1 is arranged on the support frame 5 through a large-span space truss structure. The components of the truss can be connected by bolts through a connecting plate, or other suitable methods can be used for connection. There is a height difference between the front and rear concrete piles 1 when they are arranged, and the inclination angle of the support frame 5 can also be changed. This inclination angle is between 10 degrees and 20 degrees, and the specific situation depends on the local annual cumulative radiation historical data. The purpose of this is to make the photovoltaic panel fixed on the support frame 5 form a certain slope, so as to maximize the power generation efficiency of the photovoltaic panel.

[0024] More specifically, the concrete pile 2 is provided with bolt holes at the waterline position. According to the historical water level information, relevant measuring equipment is used to determine the position where the hole needs to be drilled, and the hole position is marked on the concrete pile 2. According to the needs, a suitable drill bit and drilling machine are selected for drilling. During the drilling process, it is necessary to control the feed speed and rotation speed of the drill bit to avoid the concrete pile 2 from breaking or the drill bit from being damaged. After the drilling is completed, the residue and dust in the hole need to be removed, and compressed air or a hole cleaner can be used for cleaning, including cleaning, lubrication and drying of the hole wall.

[0025] More specifically, the box body 3 includes an inner wall 31, an outer wall 32, a top cover 33 and a bottom 34, and the inner wall 31 is connected to the concrete pile 2. The inner wall of the box body 3 is connected to the concrete pile 2 by bolts 6 to form a whole. The material of the box body 3 can be iron sheet or other airtight materials that meet the force requirements, and anti-corrosion measures need to be taken before entering the water to prevent corrosion damage. At the same time, there must be no air leakage at the bolt 6, and a sealant can be applied to the bolt to form a sealing film to prevent gas or liquid leakage. Before using the sealant, it is necessary to clean the bolt 6 and the contact surface (sealing surface) between the bolt 6 and the bolt hole, apply the sealant evenly on the sealing surface, and then tighten the bolt 6.

[0026] More specifically, this wave energy device is an oscillating water column structure, and it is necessary to ensure that the water level is always in the middle position of the box, that is, the water level is not lower than the bottom of the box when the water level is low, and the water level is not higher than the top of the box when the water level is high, so that the power generation efficiency of the wave energy device can be maximized. A turbine 4 is placed on the top of the box 3, and there are six water inlet holes 7 at the bottom. Under normal use conditions, seawater will submerge the water inlet holes 7 at the bottom, and its working process is: the wave moves toward the box 3, when the wave crest approaches the box 3, seawater enters the box 3 from the water inlet holes 7, pushing the water level in the box 3 to rise, and the rising water level increases the air pressure in the box 3. When the trough approaches the box 3, seawater is drawn out from the water inlet holes 7, the water level in the box 3 drops, and the falling water level reduces the air pressure in the box 3. The up and down movement of the waves pushes the air in the box 3 to generate a reciprocating airflow, thereby driving the turbine to rotate and converting mechanical energy into electrical energy. The electricity generated by wave energy will be used together with the electricity generated by photovoltaic panels to convert direct current into alternating current through an inverter. This combination will improve power generation efficiency and reduce power generation costs.

[0027] The purpose of this embodiment is to provide a complementary power generation system that has a lower impact on pile foundations and can be combined with wave energy power generation devices in order to overcome the higher construction and maintenance costs of offshore photovoltaic power stations compared to traditional onshore photovoltaic power stations. Traditional pile-foundation offshore photovoltaic power stations are far away from the water surface and require a longer pile foundation. However, this embodiment can provide a placement position for the wave energy device by placing an oscillating water column wave energy device on the pile foundation, and can also effectively utilize the space of the pile foundation at the waterline to improve power generation efficiency. Fixing the wave energy device on the pile foundation has less impact on the hydrodynamics of the pile foundation and will not cause greater harm to the pile foundation extraction structure. At the same time, this technology is easy to construct and easy to implement.

[0028] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A power generation system for offshore photovoltaic and wave energy devices in the form of pile foundation, comprising a photovoltaic panel (1), a concrete pile (2), a support frame (5), and a support frame base (8), wherein the support frame (5) is arranged on the upper part of the concrete pile (2), and the photovoltaic panel (1) is installed on the support frame (5), characterized in that: It also comprises a wave energy device, which comprises a box (3) and a turbine (4), the turbine (4) being installed on the top of the box (3), a plurality of water inlet holes (7) being provided on the box (3), the box (3) being installed on the concrete pile (2), and the middle position of the box (3) being located below the water level line.

2. The offshore photovoltaic and wave energy device complementary power generation system in the form of pile foundation according to claim 1 is characterized in that: The box body (3) comprises an inner wall (31), an outer wall (32), a top cover (33) and a bottom (34); the inner wall (31) is connected to the concrete pile (2).

3. The offshore photovoltaic and wave energy device complementary power generation system in the form of pile foundation according to claim 2 is characterized in that: The water inlet hole (7) is arranged at the bottom of the box body (3).

4. The offshore photovoltaic and wave energy device complementary power generation system in the form of pile foundation according to claim 2 is characterized in that: The concrete pile (2) is provided with a bolt hole, the inner wall (31) of the box body is connected to the concrete pile (2) via a bolt (6), and a sealant is applied on the contact surface between the bolt (6) and the bolt hole.

5. The offshore photovoltaic and wave energy device complementary power generation system in the form of pile foundation according to claim 1 is characterized in that: The photovoltaic panel (1) and the turbine (4) are connected to the same inverter.

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