Deep sea floating type wind generating set cooling system and wind generating set

Abstract

The invention relates to the field of wind power generation, in particular to a deep sea floating type wind generating set cooling system which comprises a floating body foundation, an air cooling circulation module and a water cooling circulation module, an electrical equipment cabin and a floating body cabin are arranged in the floating body foundation, and the electrical equipment cabin is located at the top of the floating body cabin and separated from the floating body cabin; the air cooling circulation module comprises a heat exchanger, a hot air input pipe and a cold air output pipe, the heat exchanger is arranged in the electrical equipment cabin, the hot air input pipe and the cold air output pipe are both located in the electrical equipment cabin and connected with the heat exchanger, and the water cooling circulation module comprises a pump set, a cold seawater input pipe and a hot seawater output pipe. The pump set is arranged in the electrical equipment cabin, one end of the cold seawater input pipe is connected with the pump set, the other end is located in the floating body cabin, one end of the hot seawater output pipe is connected with the pump set, and the other end is located in the floating body cabin. The heat dissipation device solves the heat dissipation problem of the offshore wind generating set and has the advantages of being good in cooling effect, low in cost and low in energy consumption.

Description

Technical Field

[0001] This application relates to the field of offshore wind power generation, and in particular to a cooling system for a deep-sea floating wind turbine generator and a wind turbine generator. Background Technology

[0002] As floating turbine generators are developed in deeper waters, their power output is increasing, leading to a greater capacity and number of associated equipment such as converters and transformers, and consequently, higher heat consumption. In practice, to avoid damage from the harsh marine environment, including high salt spray and high humidity, these devices are typically housed in a sealed environment within the floating foundation of the turbine generator. Although these devices are equipped with cooling systems, the significant heat radiation they generate, coupled with the effects of solar radiation at sea, easily results in high temperatures within the enclosed space where the equipment is located.

[0003] In existing technical solutions, firstly, ignoring the impact of thermal radiation on equipment leads to increased ambient temperature within the enclosed space, especially during summer when frequent high-temperature alarms occur. This results in reduced equipment lifespan, reduced power output, and even shutdowns, severely impacting unit operating efficiency and power generation revenue. Secondly, using industrial air conditioning equipment to cool the unit's environment presents drawbacks such as high self-consumption, high equipment cost, low cooling efficiency, low reliability, and poor maintainability, failing to meet the unit's cooling requirements. Summary of the Invention

[0004] To address the heat dissipation problem of offshore wind turbine generators, this application provides a deep-sea floating wind turbine generator cooling system and a wind turbine generator.

[0005] Firstly, the cooling system for a deep-sea floating wind turbine generator provided in this application adopts the following technical solution: A deep-sea floating wind turbine cooling system includes a floating foundation, an air-cooled circulation module, and a water-cooled circulation module. The floating foundation contains an electrical equipment compartment for installing electrical equipment and a floating compartment for storing seawater. The electrical equipment compartment is located on top of the floating compartment and is separated from it. The air-cooled circulation module includes a heat exchanger, a hot air input pipe, and a cold air output pipe. The heat exchanger is located inside the electrical equipment compartment. Both the hot air input pipe and the cold air output pipe are located inside the electrical equipment compartment and are connected to the heat exchanger. The water-cooled circulation module includes a pump unit, a cold seawater input pipe, and a hot seawater output pipe. The pump unit is located inside the electrical equipment compartment. One end of the cold seawater input pipe is connected to the pump unit, and the other end is located inside the floating compartment. One end of the hot seawater output pipe is connected to the pump unit, and the other end is located inside the floating compartment.

[0006] By adopting the above technical solution, the air-cooled circulation module is used to dissipate heat from the electrical equipment, and the water-cooled circulation module is used to exchange heat between the seawater inside the floating body foundation and the hot air of the air-cooled circulation module. This achieves the use of seawater as a single cooling source, resulting in good cooling effect and low cost. At the same time, air cooling can prevent damage and corrosion to the electrical equipment.

[0007] Optionally, the position of the cold seawater inlet pipe at the inner end of the floating chamber is lower than the position of the hot seawater outlet pipe at the inner end of the floating chamber.

[0008] By adopting the above technical solution, the seawater that has undergone heat exchange is prevented from re-entering the heat exchanger without being cooled, thus improving the cooling effect.

[0009] Optionally, the hot air inlet pipe is coiled at the top of the electrical equipment inside the electrical equipment compartment, and the cold air outlet pipe is coiled at the bottom of the electrical equipment inside the electrical equipment compartment. Both the hot air inlet pipe and the cold air outlet pipe are flat pipes with a rectangular cross-section.

[0010] By adopting the above technical solutions, the spiral setting can extend the length of the input and output pipes, thereby improving the heat exchange effect, while the flat pipe can increase the heat exchange area.

[0011] Optionally, the outer wall of the floating body foundation is a heat-conducting wall to allow the seawater inside the floating body chamber to exchange heat with the outside seawater.

[0012] By adopting the above technical solution, the outer wall made of thermally conductive material can fully exchange heat with the outside seawater, reduce the temperature of the circulating seawater in the floating chamber, and cool the hot air in the air-cooled circulation module.

[0013] Secondly, this application provides a deep-sea floating wind turbine generator set, including a wind turbine generator set, a generator set foundation, and the aforementioned cooling system. The generator set foundation is connected to a floating body foundation, and the wind turbine generator set is installed on the generator set foundation.

[0014] Optionally, the unit foundation includes a first column and a second column, the floating body foundation includes a floating body column, the electrical equipment compartment and the floating body compartment are located inside the floating body column, the bottom of the floating body column is provided with a lower floating box, the first column, the second column and the floating body column are arranged in a triangle with the floating body column as the vertex, a wind turbine is installed on the top of the first column and a wind turbine is installed on the top of the second column, a reinforcing beam is provided between the first column and the second column, and connecting beams are provided between the first column and the floating body column, and between the second column and the floating body column.

[0015] By adopting the above technical solution, the floating foundation of the wind turbine generator set is composed of the first column, the second column, the floating column, the lower floating box, the connecting crossbeam, and the reinforcing crossbeam, which has good stability and is safe and reliable.

[0016] Optionally, in the frontal projection plane with the floating column in front, the first column and the second column are arranged in a V-shape, with the first column forming an acute angle β with the horizontal plane and the second column forming an acute angle β with the horizontal plane. In the side projection plane, the floating column is vertically arranged, with both the first column and the second column inclined towards the floating column. The first column and the second column are in the same inclined plane and form an acute angle α with the vertical plane.

[0017] By adopting the above technical solutions, the distance between the blade tip and the tower is increased (the blade tip is closer to the tower when vertical), avoiding the risk of collision (tower sweep) between the conventional vertical tower and the tower due to blade deformation under load. At the same time, the center of gravity can be controlled, making the overall platform center of gravity more stable.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. Based on the low temperature of the seawater in the inner cavity of the float, a seawater cooling system is designed. By utilizing the heat exchange between the seawater cooling system and the air circulation cooling system of the float, the powerful heat exchange performance of deep-sea seawater is used to achieve the purpose of cooling the equipment environment. Compared with traditional industrial air conditioning cooling, air cooling and other design methods, the seawater cooling system has the advantages of good stability, high reliability and low self-power consumption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cooling system of the deep-sea floating wind turbine generator set according to Embodiment 1 of this application.

[0020] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0021] Figure 3 This is a schematic diagram showing the positions of the floating body foundation and the unit foundation on the sea level in Embodiment 1 of this application.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the deep-sea floating wind turbine generator set of Embodiment 2 of this application.

[0023] Figure 5 This is a front view structural schematic diagram of the deep-sea floating wind turbine generator set according to Embodiment 2 of this application.

[0024] Figure 6 This is a side view structural schematic diagram of the deep-sea floating wind turbine generator of Embodiment 2 of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Floating body foundation; 10. Floating body column; 11. Electrical equipment compartment; 12. Floating body compartment; 2. Air-cooled circulation module; 21. Heat exchanger; 22. Hot air inlet pipe; 23. Cold air outlet pipe; 3. Water-cooled circulation module; 31. Pump set; 32. Cold seawater inlet pipe; 33. Hot seawater outlet pipe; 4. Wind turbine; 5. Unit foundation; 51. First column; 52. Second column; 53. Reinforcing beam; 54. Connecting beam; 6. Lower floating box; 71. Transformer; 72. Ring main unit; 8. Support tower. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0027] The directional terms such as "up," "down," "left," "right," "front," and "back" used in this application only represent relative positions in the diagram and are used for the convenience of describing this application. They do not represent the absolute position of the product and should not be regarded as limitations on this application.

[0028] Example 1 This application discloses a cooling system for a deep-sea floating wind turbine generator.

[0029] like Figure 1 and Figure 2 As shown, the deep-sea floating wind turbine cooling system of this embodiment includes a floating base 1, an air-cooled circulation module 2, and a water-cooled circulation module 3. The floating base 1 houses an electrical equipment compartment 11 and a floating chamber 12. The electrical equipment compartment 11, located on top of the floating chamber 12, is used to install electrical equipment, mainly including a transformer 71, a converter (not shown in the figure), and a ring main unit 72. The electricity generated by the turbine is ultimately converted into grid-compliant electricity by the electrical equipment within the floating base 1 and transmitted to the grid. The floating chamber 12 stores seawater, forming the buoyancy support system of the floating base 1. The electrical equipment compartment 11 and the floating chamber 12 are isolated from each other to prevent seawater from entering the electrical equipment compartment 11.

[0030] The air-cooled circulation module 2 includes a heat exchanger 21, a hot air inlet pipe 22, and a cold air outlet pipe 23. The heat exchanger 21, the hot air inlet pipe 22, and the cold air outlet pipe 23 are all arranged inside the electrical equipment compartment 11. The hot air inlet pipe 22 and the cold air outlet pipe 23 are both located inside the electrical equipment compartment 11 and are respectively connected to the heat exchanger 21. The high-temperature air in the electrical equipment compartment 11 enters the heat exchanger 21 through the hot air inlet pipe 22 for cooling. The cooled low-temperature air then enters the electrical equipment compartment 11 through the cold air outlet pipe 23 to dissipate heat from the electrical equipment, thereby forming an air cooling circulation system.

[0031] The water-cooled circulation module 3 includes a pump set 31, a cold seawater inlet pipe 32, and a hot seawater outlet pipe 33. The pump set 31 is located inside the electrical equipment compartment 11. One end of the cold seawater inlet pipe 32 is connected to the pump set 31, and the other end extends out of the electrical equipment compartment 11 and into the floating body compartment 12. One end of the hot seawater outlet pipe 33 is connected to the pump set 31, and the other end extends out of the electrical equipment compartment 11 and into the floating body compartment 12. The floating body compartment 12 stores a large amount of seawater. The pump set 31 pumps the low-temperature seawater at the bottom of the floating body compartment 12 to the heat exchanger 21 for heat exchange (to cool the hot air in the air-cooled circulation module 2) through the cold seawater inlet pipe 32. After heat exchange, the seawater re-enters the floating body compartment 12 through the hot seawater outlet pipe 33. To improve the cooling effect, the inlet position of the cold seawater inlet pipe 32 in the floating body compartment 12 is lower than the outlet position of the hot seawater outlet pipe 33 in the floating body compartment 12, to prevent the seawater from re-entering the heat exchanger 21 without being cooled after heat exchange.

[0032] like Figure 3 As shown, in this embodiment, the outer wall of the float base 1 is a heat-conducting wall surface, and the seawater inside the float body exchanges heat with the seawater outside the float body, so that the seawater inside the float body is kept at a low temperature, thereby improving the heat exchange effect of the heat exchanger 21.

[0033] In this embodiment, the electrical equipment compartment 11 is equipped with multiple independent compartments. Based on the type and size of the electrical equipment, the transformer 71, converter, and ring main unit 72 are installed in their respective independent compartments. This avoids interference between different electrical devices, provides fire isolation, and facilitates independent maintenance of each device. Ventilation openings are located at the top and bottom of each independent compartment. Hot air inlet pipes 22 are coiled at the top of each compartment, allowing close contact with the transformer 71, converter, and ring main unit 72 to collect the heat emitted by these devices. Cold air outlet pipes 23 are coiled at the bottom of each compartment to deliver cooled air through the ventilation openings to each compartment for rapid cooling of the transformer 71, converter, and ring main unit 72.

[0034] To increase the heat exchange area, both the hot air inlet pipe 22 and the cold air outlet pipe 23 are flat pipes with a rectangular cross-section.

[0035] In this embodiment, the floating body 12 is designed with a multi-layered, interconnected structure. It is equipped with a dynamic ballast system that can control the ballast water within the floating body according to the unit's needs, thereby improving the stability of the floating body foundation 1 and preventing it from swaying. The ballast water within the floating body comes from filtered, deep, low-temperature seawater.

[0036] The implementation principle of the deep-sea floating wind turbine cooling system in this embodiment is as follows: The cooling system mainly consists of a three-stage cooling system. The first-stage cooling system is an air-cooled circulation module 2, the second-stage cooling system is a water-cooled circulation module 3, and the third-stage cooling system is the dynamic ballast water in the floating body exchanging heat with the outside seawater through the wall of the floating body foundation 1. When the fan is running, the electrical equipment in the floating body foundation 1 will generate a large amount of heat radiation, causing the air temperature around the equipment to rise. The high-temperature air has a lower density, so the hot air in each electrical equipment space is transported to the heat exchanger 21 through the hot air input pipe 22 in the electrical equipment compartment 11. At the same time, the pump group 31 pumps the low-temperature seawater in the floating body compartment 12 to the heat exchanger 21 through the cold seawater input pipe 32. In the heat exchanger 21, after the low-temperature seawater exchanges heat with the hot air, on the one hand, the hot air is cooled and enters the electrical equipment compartment 11 through the cold air output pipe 23 to cool the various electrical equipment; on the other hand, the temperature of the low-temperature seawater rises and returns to the floating body compartment 12 through the hot seawater output pipe 33. Simultaneously, the seawater inside the floating chamber 12 exchanges heat with the seawater outside the floating chamber 12, keeping the seawater inside the floating chamber 12 at a low temperature. The entire three-stage cooling system operates simultaneously, with seawater as the sole cooling source, thus utilizing seawater to cool the wind turbine equipment.

[0037] Example 2 like Figure 4 As shown, the deep-sea floating wind turbine generator set of this embodiment includes a wind turbine generator set 4, a generator set foundation 5, and the cooling system in the above embodiment 1. The generator set foundation 5 is connected to the floating body foundation 1, and the wind turbine generator set 4 is installed on the generator set foundation 5.

[0038] In this embodiment, specifically, the unit foundation 5 includes a first column 51 and a second column 52, and the floating foundation 1 includes a floating column 10, wherein the electrical equipment compartment 11 and the floating compartment 12 are located inside the floating column 10. The bottom of the floating column 10 is provided with a lower floating box 6. The first column 51, the second column 52, and the floating column 10 are arranged in a triangle with the floating column 10 as the vertex. A wind turbine 4 is installed on the top of the first column 51, and a wind turbine 4 is installed on the top of the second column 52. A reinforcing beam 53 is provided between the first column 51 and the second column 52. A connecting beam 54 is provided between the first column 51 and the floating column 10, and between the second column 52 and the floating column 10.

[0039] The entire floating foundation of the wind turbine generator mainly consists of a first column 51, a second column 52, a floating column 10, a lower buoy 6, a connecting beam 54, and a reinforcing beam 53, and is positioned on the sea surface by a mooring chain system (not shown in the figure). The reinforcing beam 53 is located at the bottom of the first column 51 and the second column 52. The floating column 10, the reinforcing beam 53, the first column 51, and the second column 52 are all hollow structures. The lower buoy 6 and the reinforcing beam 53 are completely submerged in seawater, while the lower parts of the first column 51, the second column 52, and the floating column 10 are located in the seawater. The buoyancy of the entire floating foundation is mainly provided by the lower buoy 6 and the hollow reinforcing beam 53. Both connecting beams 54 are hollow structures to reduce the overall weight of the foundation. The two connecting beams 54 are located in the same horizontal plane and are arranged in a V-shape in the horizontal plane. The reinforcing beam 53 is set horizontally. The two connecting beams 54 are located above the sea level, and the reinforcing beam 53 is located below the sea level.

[0040] like Figure 5 and Figure 6 As shown, in this embodiment, one wind turbine 4 is mounted on the first column 51 via a support tower 8, with the first column 51 and the support tower 8 being collinear. Similarly, the other wind turbine 4 is mounted on the second column 52 via a support tower 8, with the second column 52 being collinear with the support tower 8. In the frontal projection plane with the floating column 10 in front, the first column 51 and the second column 52 are arranged in a V-shape, with the first column 51 forming an acute angle β with the horizontal plane, and the second column 52 forming an acute angle β with the horizontal plane. That is, the two support towers 8 are tilted outward, which can reduce the horizontal distance between the foundations at the bottom of the two turbine towers. In the side-view projection plane, the floating column 10 is vertically arranged. The first column 51 and the second column 52 are both inclined towards the floating column 10. The first column 51 and the second column 52 are in the same inclined plane and form an acute angle α with the vertical plane. That is, the two supporting towers 8 are tilted forward, which increases the distance between the blade tip and the tower (the blade tip is closer to the tower when vertical). This avoids the risk of collision (tower sweep) between the conventional vertical tower and the tower due to blade deformation under load. At the same time, it can control the center of gravity, making the overall platform center of gravity more stable. The values ​​of α and β are 0 to 90°.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A deep offshore floating wind turbine generator system cooling system, characterized by: The cooling system comprises a floating foundation (1), an air cooling circulation module (2) and a water cooling circulation module (3), the floating foundation (1) is internally provided with an electrical equipment cabin (11) for installing electrical equipment and a floating cabin (12) for storing seawater, the electrical equipment cabin (11) is located at the top of the floating cabin (12) and is separated from the floating cabin (12), the air cooling circulation module (2) comprises a heat exchanger (21), a hot air input pipe (22) and a cold air output pipe (23), the heat exchanger (21) is arranged in the electrical equipment cabin (11), the hot air input pipe (22) and the cold air output pipe (23) are both arranged in the electrical equipment cabin (11) and are connected with the heat exchanger (21) respectively, the water cooling circulation module (3) comprises a pump group (31), a cold seawater input pipe (32) and a hot seawater output pipe (33), the pump group (31) is arranged in the electrical equipment cabin (11), one end of the cold seawater input pipe (32) is connected with the pump group (31) and the other end is arranged in the floating cabin (12), one end of the hot seawater output pipe (33) is connected with the pump group (31) and the other end is arranged in the floating cabin (12).

2. The deep offshore floating wind turbine generator system cooling system of claim 1, wherein: The position of the end of the cold seawater input pipe (32) in the floating cabin (12) is lower than the position of the end of the hot seawater output pipe (33) in the floating cabin (12).

3. The deep offshore floating wind turbine generator system cooling system of claim 1, wherein: The hot air input pipe (22) spirals at the top of the electrical equipment in the electrical equipment cabin (11), and the cold air output pipe (23) spirals at the bottom of the electrical equipment in the electrical equipment cabin (11).

4. The deep offshore floating wind turbine system cooling system of any one of claims 1 to 3, wherein: The hot air input pipe (22) and the cold air output pipe (23) are both flat tubes with a rectangular cross section.

5. The deep offshore floating wind turbine system cooling system of any one of claims 1 to 3, wherein: The outer wall of the floating foundation (1) is a heat-conducting wall surface so that the seawater in the floating cabin (12) exchanges heat with the seawater outside.

6. A deep offshore floating wind turbine system, characterized by: The cooling system comprises a wind turbine (4), a unit foundation (5) and the cooling system according to any one of claims 1 to 5, the unit foundation (5) is connected with the floating foundation (1), and the wind turbine (4) is installed on the unit foundation (5).

7. The deep offshore floating wind turbine generator system as set forth in claim 6, wherein: The unit foundation (5) comprises a first vertical column (51) and a second vertical column (52), the floating foundation (1) comprises a floating vertical column (10), the electrical equipment cabin (11) and the floating cabin (12) are arranged in the floating vertical column (10), the bottom of the floating vertical column (10) is provided with a lower floating box (6), the first vertical column (51), the second vertical column (52) and the floating vertical column (10) are arranged in a triangular shape with the floating vertical column (10) as the top vertex, one wind turbine (4) is installed at the top of the first vertical column (51) and one wind turbine (4) is installed at the top of the second vertical column (52), a reinforcing cross beam (53) is arranged between the first vertical column (51) and the second vertical column (52), and a connecting cross beam (54) is arranged between the first vertical column (51) and the floating vertical column (10) and between the second vertical column (52) and the floating vertical column (10).

8. The deep offshore floating wind turbine generator system as set forth in claim 7, wherein: In the front view projection plane in front of the float column (10), the first column (51) and the second column (52) are arranged in V shape, the first column (51) forms an acute angle β with the horizontal plane, the second column (52) forms an acute angle β with the horizontal plane, in the side view projection plane, the float column (10) is vertically arranged, the first column (51) and the second column (52) are both inclined to the float column (10), the first column (51) and the second column (52) are in the same inclined plane, and form an acute angle α with the vertical plane.

Images