Energy-saving wind power generator and air cooling system thereof

Abstract

This invention belongs to the field of wind turbine technology, specifically relating to air-cooling systems, and more particularly to an energy-saving wind turbine and its air-cooling system. The system includes a wind tunnel housing, and two independent wind turbines mounted on the housing. The wind tunnel housing is connected to the wind turbine's inlet via an outlet interface assembly, and an airflow measurement module is installed at the outlet of the outlet interface assembly. The wind turbine, electric turbine, and airflow measurement module are all connected to the wind turbine's controller. The controller compares the real-time airflow value fed back by the airflow measurement module with a preset rated airflow value to determine whether to activate the electric turbine to supplement airflow, ensuring the energy-saving operation of the entire air-cooling system. Compared to traditional solutions, this system saves over 50% of electrical energy, more than doubles the service life, and reduces total life-cycle maintenance costs by over 50%.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, and relates to air-cooling systems, and more particularly to an energy-saving wind turbine and its air-cooling system. Background Technology

[0002] The most common cooling systems for wind turbines include air-cooled systems, water-cooled systems, and air-water cooling systems. Among these, air-cooled systems are the most frequently used cooling method for wind turbines due to their advantages such as clean cooling medium, strong cooling capacity, and low manufacturing cost. Air-cooled systems are based on the principle of fluid convection heat transfer. A cooling fan provides the airflow, causing it to flow from the air duct into the generator. Through convection heat transfer, the heat generated by the generator is dissipated, thus cooling the generator.

[0003] The cooling fan in existing air-cooled systems consists of an electric motor and a centrifugal impeller. The electric motor primarily powers the centrifugal impeller, which then pushes air through the air duct casing into the wind turbine for cooling. However, this system still has the following drawbacks: 1. The electric motor consumes a large amount of electrical energy due to prolonged operation; 2. The electric motor is prone to fatigue due to prolonged operation, resulting in a shorter service life and higher maintenance costs.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an energy-saving wind turbine and its air-cooling system to solve the problems of high energy consumption and short lifespan of existing air-cooling systems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This energy-saving air-cooled wind turbine system includes a wind tunnel housing, and two independent wind turbines and electric turbines mounted on the wind tunnel housing. The wind tunnel housing is connected to the air inlet of the wind turbine via an air outlet assembly, and an airflow measurement module is installed at the air outlet of the air outlet assembly. The wind turbine, electric turbine, and airflow measurement module are all connected to the wind turbine's controller. The controller compares the real-time airflow value fed back by the airflow measurement module with a preset rated airflow value to determine whether to start the electric turbine to supplement the airflow, thereby ensuring the energy-saving operation of the entire air-cooled system.

[0007] Specifically, the air duct housing includes an impeller box, and the air outlet assembly is connected to the impeller box and communicates with the internal space of the impeller box; the impeller box is composed of a parallel and opposite left side plate, a right side plate, and a U-shaped plate connecting the two. The impeller housing is equipped with an isolation air guide plate to divide the internal space of the impeller housing into a wind turbine installation area and an electric turbine installation area; the wind turbine installation area is equipped with a first air inlet pipe to facilitate air entry, and the electric turbine installation area is equipped with a second air inlet pipe to facilitate air entry. The air inlet directions of the first air inlet pipe and the second air inlet pipe are opposite.

[0008] Specifically, the isolation air guide plate is a T-shaped air guide plate, the horizontal plate of the T-shaped air guide plate is fixedly connected to the horizontal part of the U-shaped plate, the vertical plate of the T-shaped air guide plate extends in a direction parallel to the side plate of the impeller box, and the length of the vertical plate exceeds 2 / 3 of the diameter of the wind turbine impeller.

[0009] Specifically, the wind turbine includes a main shaft, which includes a first main shaft located outside the impeller housing and a second main shaft located inside the impeller housing. A wind turbine is installed at the end of the first main shaft away from the impeller housing, and the end of the second main shaft near the left side plate is connected to the impeller housing through a bearing assembly. A balance block and a wind turbine are arranged sequentially from the inside to the outside on the outer side of the bearing, and both the balance block and the wind turbine are located within the wind turbine installation area.

[0010] Specifically, the electric fan includes a motor installed on the outer wall of the right side plate, an impeller assembly installed on the drive shaft of the motor, and the impeller assembly is located inside the impeller housing; a wind collector ring is also provided between the impeller assembly and the left side plate, and the wind collector ring is fixedly installed on the inner wall of the left side plate.

[0011] Specifically, the motor is fixedly mounted on the outer wall of the right side plate via a flange.

[0012] Specifically, the number of wind turbines is at least one; when the number of wind turbines is multiple, the multiple wind turbines are connected in parallel.

[0013] Specifically, the air outlet interface assembly is composed of a first trapezoidal plate and a second trapezoidal plate arranged in parallel and opposite directions, and a third connecting plate and a fourth connecting plate welded between them; the large port (the port corresponding to the long bottom edge) of the air outlet interface assembly is connected to the impeller housing by fasteners, and the small port (the port corresponding to the short bottom edge) is connected to the air inlet of the wind turbine by fasteners.

[0014] Specifically, when the real-time air volume is ≤90% of the rated air volume, the electric fan is turned on to supplement the air volume until the real-time air volume exceeds 90% of the rated air volume, and energy-saving operation is performed; when the real-time air volume is ≥110% of the rated air volume, the electric fan is turned off, and the air-cooling system operates with zero energy consumption.

[0015] In addition, the present invention also provides a wind turbine generator, including the energy-saving wind turbine generator air-cooling system as described in part or all of the above.

[0016] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: This invention utilizes a parallel connection between a wind turbine-driven centrifugal impeller and an electrically driven centrifugal impeller. When the airflow provided by the wind turbine meets the needs of the wind turbine, the electrically driven impeller stops working. When the airflow provided by the wind turbine is insufficient to meet the needs of the wind turbine, the electrically driven impeller starts working, but its operation is only to supplement the remaining wind power and does not require full-power operation. In other words, this invention is a system where the wind turbine primarily provides the airflow, supplemented by an electrically driven impeller, to reduce the energy consumption of the air-cooled system, extend the lifespan of the electrically driven impeller, and reduce replacement costs. Compared to traditional solutions, this air-cooled system can save more than 50% of electrical energy, more than double its service life, and reduce total life-cycle maintenance costs by more than 50%. Attached Figure Description

[0017] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A structural diagram of an energy-saving wind turbine air-cooling system provided by the present invention; Figure 2 The structural diagram of the wind turbine provided by this invention; Figure 3 The structural diagram of the electric fan provided by this invention; Figure 4 This is a structural diagram of the air duct housing provided by the present invention; Figure 5 A structural diagram of an energy-saving wind turbine air-cooled system with a wind turbine provided for an embodiment; Figure 6 A structural diagram of an energy-saving wind turbine air-cooled system with two wind turbines is provided for an embodiment. Figure 7 A schematic diagram of the structure of the energy-saving wind turbine air-cooling system provided in the embodiment; Figure 8 This is a schematic diagram of the air guide plate in the energy-saving wind turbine air-cooling system provided in the embodiment.

[0020] The components include: 1. Air duct housing; 1-1. Impeller housing; 1-1-1. Left side plate; 1-1-2. Right side plate; 1-1-3. U-shaped plate; 1-1-4. Isolation guide plate; 1-2. Air outlet assembly; 2. Wind turbine; 2-1. First main shaft; 2-2. Second main shaft; 2-3. Wind turbine impeller; 2-4. Bearing assembly; 2-5. Balance block; 2-6. Wind turbine impeller; 3. Electric turbine; 3-1. Motor; 3-2. Flange; 3-3. Electric turbine impeller; 3-4. Air collector ring; 4. Air volume measurement module; 5. First air inlet pipe; 6. Second air inlet pipe. Detailed Implementation

[0021] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0022] This invention addresses the technical problems of high energy consumption, short lifespan, and high maintenance costs of existing traditional air-cooling systems. Based on the environmental characteristics of wind turbine air-cooling systems, it designs an air-cooling system powered by both wind and electricity to solve the two major problems of existing technologies.

[0023] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0024] See Figures 1-7 As shown, this embodiment provides an energy-saving air-cooled wind turbine system, including a wind tunnel housing 1, and wind turbine 2 and electric turbine 3 installed on the wind tunnel housing 1 and independent of each other; the wind tunnel housing 1 is connected to the air inlet of the wind turbine through an air outlet assembly 1-2, and an air volume measurement module 4 is installed at the air outlet of the air outlet assembly 1-2; the wind turbine 2, electric turbine 3 and air volume measurement module 4 are all connected to the controller of the wind turbine, and the controller compares the real-time air volume value fed back by the air volume measurement module 4 with the preset rated air volume value to determine whether to start the electric turbine 3 to supplement the air volume, so as to ensure the energy-saving operation of the entire air-cooled system.

[0025] Furthermore, the air duct housing 1 includes an impeller housing 1-1, and the air outlet assembly 1-2 is connected to the impeller housing 1-1 and communicates with the internal space of the impeller housing 1-1; The impeller housing 1-1 is composed of a left side plate 1-1-1, a right side plate 1-1-2, and a U-shaped plate 1-1-3 connecting the two, which are arranged in parallel and opposite directions. An isolation air guide plate 1-1-4 is provided inside the impeller housing 1-1 to divide the internal space of the impeller housing 1-1 into a wind turbine installation area and an electric turbine installation area; a first air inlet pipe 5 is provided outside the wind turbine installation area to facilitate air entry, and a second air inlet pipe 6 is provided outside the electric turbine installation area to facilitate air entry, with the air inlet directions of the first air inlet pipe 5 and the second air inlet pipe 6 being opposite.

[0026] Preferably, the left side plate 1-1-1, the right side plate 1-1-2, and the U-shaped plate 1-1-3 are all made of steel plates, and the U-shaped plate 1-1-3 can be fixedly connected to the left side plate 1-1-1 and the right side plate 1-1-2 by bolts or welding; the first air inlet pipe 5 and the second air inlet pipe 6 are both fixed to the outside of the impeller housing 1-1 by bolts or welding.

[0027] Preferably, see Figure 8 The isolation guide plate 1-1-4 is a T-shaped guide plate. The horizontal plate of the T-shaped guide plate is fixedly connected to the horizontal part of the U-shaped plate 1-1-3. The vertical plate of the T-shaped guide plate extends in a direction parallel to the side plate of the impeller housing 1-1, and the length of the vertical plate exceeds 2 / 3 of the diameter of the wind turbine impeller 2-3 in the wind turbine 2. This achieves isolation while improving the efficiency of the wind turbine.

[0028] In detail, the design of the isolation air guide plate 1-1-4 achieves the isolation between the wind turbine installation area and the electric turbine installation area. The air path of the wind turbine 2 and the air path of the electric turbine 3 are independent of each other and do not interfere with each other, but they can converge at the air outlet assembly 1-2 to form an adjustable air volume air path that is first connected in parallel and then concentrated. Furthermore, combined with the double parabolic symmetry structure of the wind turbine installation area and the electric turbine installation area, the following effects are achieved: First, the internal air path of the air path shell 1 is optimized, and the internal wind resistance of the air path shell 1 is reduced; Second, it acts as a reinforcing rib, improving the overall structural strength of the air path shell 1.

[0029] Furthermore, the wind turbine 2 includes a main shaft, which includes a first main shaft 2-1 located outside the impeller housing 1-1 and a second main shaft 2-2 located inside the impeller housing 1-1; a wind turbine 2-3 is installed at the end of the first main shaft 2-1 away from the impeller housing 1-1, and the end of the second main shaft 2-2 near the left side plate 1-1-1 is connected to the impeller housing 1-1 through a bearing assembly 2-4. A balance block 2-5 and a wind turbine 2-6 are arranged sequentially from the inside to the outside on the outer side of the bearing assembly 2-4, and both the balance block 2-5 and the wind turbine 2-6 are located within the wind turbine installation area, while the wind turbine 2-3 is installed outside the impeller housing 1-1.

[0030] Among them, the balance block 2-5 solves the balance problem between the wind turbine 2-3 and the wind turbine 2-6, further reduces the load on the bearing assembly 2-4, and extends the life of the bearing assembly 2-4.

[0031] Furthermore, the electric fan 3 includes a motor 3-1 mounted on the outer wall of the right side plate 1-1-2. An electric impeller 3-3 is mounted on the drive shaft of the motor 3-1, and the electric impeller 3-3 is located inside the impeller housing 1-1. A collector ring 3-4 is also provided between the electric impeller 3-3 and the left side plate 1-1-1, and the collector ring 3-4 is fixedly mounted on the inner wall of the left side plate 1-1-1. Preferably, the motor 3-1 is fixedly mounted on the outer wall of the right side plate 1-1-2 via a flange 3-2.

[0032] Furthermore, the number of wind turbines 2 is at least one; when the number of wind turbines 2 is multiple, the multiple wind turbines 2 are arranged in parallel. Alternatively, multiple wind turbine blades 2-3 are connected in series on the main shaft to form a series wind turbine blade assembly. Both of these structures can obtain more wind energy, thereby enabling the wind turbine blades 2-6 to output more air volume.

[0033] Furthermore, the air outlet assembly 1-2 is composed of a first trapezoidal plate and a second trapezoidal plate arranged in parallel and opposite directions, and a third connecting plate and a fourth connecting plate welded between them; the large port of the air outlet assembly 1-2 is connected to the air duct housing 1 by fasteners, and the small port is connected to the air inlet of the wind turbine by fasteners.

[0034] Preferably, the first trapezoidal plate (isosceles trapezoidal plate), the second trapezoidal plate (isosceles trapezoidal plate), the third connecting plate and the fourth connecting plate are all made of steel plate. The large port (i.e. the port corresponding to the long base) of the air outlet assembly 1-2 is connected to the impeller housing 1-1 by bolts, and the small port (i.e. the port corresponding to the short base) is connected to the air inlet of the wind turbine by bolts. The air volume measurement module 4 is fixedly installed at the air outlet of the air outlet assembly 1-2 by bolts.

[0035] In the actual installation of the aforementioned air-cooled system, the number of wind turbines 2 can be flexibly selected according to actual needs. (See [reference needed]). Figure 5 For an energy-saving wind turbine air-cooled system with one wind turbine 2, see [link / reference]. Figure 6 This is an energy-saving air-cooled wind turbine system with two wind turbines 2, wherein the two wind turbines 2 are connected in parallel. Specifically, the installation process is as follows: 1) Installation process of wind turbine 2: First, remove the right side plate 1-1-2 of the impeller housing 1-1, install the bearing assembly 2-4 of the wind turbine 2 on the left side plate 1-1-1 of the impeller housing 1-1, and then connect the main shaft of the wind turbine 2 to the left side plate 1-1-1 through the bearing assembly 2-4. Next, wind turbine rotor 2-3 is installed on the left end of the main shaft on the outside of the left side plate 1-1-1. It should be noted that the wind turbine rotor 2-3 can be installed in multiple directions on the main shaft. It can be in the axial direction of the main shaft, the radial direction of the main shaft (achieved using a secondary shaft), or any direction in the radial direction of the main shaft. Alternatively, multiple wind turbine rotors 2-3 can be combined and installed on a single main shaft to accommodate a wider variety of wind turbine generator sets. Then, install the balance block 2-5 on the main shaft on the right side of the left side plate 1-1-1, and then install the wind turbine 2-6 on the main shaft on the right side of the balance block 2-5. Finally, install the right side plate 1-1-2, and the wind turbine 2 is installed.

[0036] The working principle of wind turbine 2 is as follows: wind drives wind turbine 2-3 to rotate, wind turbine 2-3 drives main shaft to rotate, main shaft drives wind turbine 2-6 to rotate through bearing assembly 2-4, wind turbine 2-6 generates wind pressure to draw air in from the first air inlet pipe 5, and blow it out from the air outlet assembly 1-2, entering the wind turbine to dissipate heat.

[0037] It should be further explained that the blade angle design of the wind turbine 2-6 allows the wind turbine 2-6 to generate the same air volume when rotating clockwise and counterclockwise. Therefore, the direction of rotation does not affect the air volume, increasing the reliability of the air-cooled system of the energy-saving wind turbine. Preferably, the number of blades in the wind turbine 2-6 is flexibly selected according to actual application requirements; the blade angle is 90°, that is, the blade direction is perpendicular to the axis of the main shaft.

[0038] 2) Installation process of electric fan 3: First, connect the motor 3-1 to the flange 3-2 with bolts. Then, install the electric impeller 3-3 on the drive shaft of the motor. Next, install the air collector ring 3-4 on the left side plate 1-1-1 with bolts. Then, install the assembly of the motor 3-1, flange 3-2 and impeller assembly on the right side plate 1-1-2 with bolts through the flange 3-2. The electric fan 3 is now installed.

[0039] The working principle of the electric fan 3 is as follows: the electric motor 3-1 drives the electric impeller 3-3 to rotate. The rotation of the electric impeller 3-3 generates wind pressure, which is drawn in from the second air inlet pipe 6 and pushed out from the air outlet assembly 1-2, entering the wind turbine for heat dissipation.

[0040] 3) The installation process of the air duct housing 1 is as follows: First, weld the left side plate 1-1-1 to the U-shaped plate 1-1-3, weld the second air inlet pipe 6 (left air inlet pipe) to the left side plate 1-1-1, and weld the isolation air guide plate 1-1-4 to the left side plate 1-1-1. Then, the first air inlet pipe 5 (right air inlet pipe) is welded to the right side plate 1-1-2, and then the assembly consisting of the right side plate 1-1-2 and the right air inlet pipe is connected to the U-shaped plate 1-1-3 by bolts. Finally, the air outlet assembly 1-2 is bolted to the interface consisting of the left side plate 1-1-1, the U-shaped plate 1-1-3, and the right side plate 1-1-2, thus completing the assembly.

[0041] The air volume measurement module 4 is installed on the right side of the air outlet interface assembly 1-2 of the air duct housing 1 by means of a nut.

[0042] In actual operation, wind turbine 2 starts before or simultaneously with the wind turbine. Based on the real-time air volume value fed back by the air volume measuring instrument, when the real-time air volume value is ≤90% of the rated air volume value, the electric wind turbine 3 is turned on to supplement the air volume until the real-time air volume value exceeds 90% of the rated air volume value, and energy-saving operation is carried out; when the real-time air volume value is ≥110% of the rated air volume value, the electric wind turbine 3 is turned off, and the air-cooling system operates with zero energy consumption.

[0043] Furthermore, this embodiment also provides a wind turbine, including the energy-saving wind turbine air-cooling system described in part or all of the above. The modular design of the various components of this air-cooling system facilitates maintenance, reduces the total life-cycle cost, and further enhances the compatibility of this structure with wind turbine generator sets. Compatibility can be achieved simply by changing the dimensions of some modules, making it highly applicable. The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0044] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. An energy-saving air-cooling system for a wind-driven generator, characterized in that, The system includes a wind tunnel housing (1), a wind turbine (2) and an electric turbine (3) installed on the wind tunnel housing (1) and independent of each other; the wind tunnel housing (1) is connected to the air inlet of the wind turbine generator through an air outlet assembly (1-2), and an air volume measurement module (4) is installed at the air outlet of the air outlet assembly (1-2); the wind turbine (2), the electric turbine (3) and the air volume measurement module (4) are all connected to the controller of the wind turbine generator. The controller compares the real-time air volume value fed back by the air volume measurement module (4) with the preset rated air volume value to determine whether to start the electric turbine (3) to supplement the air volume, so as to ensure the energy-saving operation of the entire air-cooling system.

2. The energy-saving wind power generator air cooling system according to claim 1, characterized in that, The air duct housing (1) includes an impeller housing (1-1), and the air outlet assembly (1-2) is connected to the impeller housing (1-1) and communicates with the internal space of the impeller housing (1-1); the impeller housing (1-1) is composed of a left side plate (1-1-1), a right side plate (1-1-2) arranged in parallel and opposite directions, and a U-shaped plate (1-1-3) connecting the two. An isolation air guide plate (1-1-4) is provided inside the impeller housing (1-1) to divide the internal space of the impeller housing (1-1) into a wind turbine installation area and an electric turbine installation area; a first air inlet pipe (5) is provided outside the wind turbine installation area to facilitate air entry, and a second air inlet pipe (6) is provided outside the electric turbine installation area to facilitate air entry, with the air inlet directions of the first air inlet pipe (5) and the second air inlet pipe (6) being opposite.

3. The energy-saving wind turbine air-cooling system according to claim 2, characterized in that, The isolation guide plate (1-1-4) is a T-shaped guide plate. The horizontal plate of the T-shaped guide plate is fixedly connected to the horizontal part of the U-shaped plate (1-1-3). The vertical plate of the T-shaped guide plate extends in a direction parallel to the side plate of the impeller housing (1-1), and the length of the vertical plate exceeds 2 / 3 of the diameter of the wind turbine impeller (2-3) in the wind turbine (2).

4. The energy-saving wind power generator air cooling system according to claim 2, characterized in that, The wind turbine (2) includes a main shaft, which includes a first main shaft (2-1) located outside the impeller housing (1-1) and a second main shaft (2-2) located inside the impeller housing (1-1). A wind turbine (2-3) is installed at the end of the first main shaft (2-1) away from the impeller housing (1-1). The end of the second main shaft (2-2) near the left side plate (1-1-1) is connected to the impeller housing (1-1) through a bearing assembly (2-4). A balance block (2-5) and a wind turbine (2-6) are arranged sequentially from the inside to the outside of the bearing assembly (2-4). Both the balance block (2-5) and the wind turbine (2-6) are located within the wind turbine installation area.

5. The energy-saving wind turbine air-cooling system according to claim 2, characterized in that, The electric fan (3) includes a motor (3-1) installed on the outer wall of the right side plate (1-1-2). An impeller assembly is installed on the drive shaft of the motor (3-1), and the impeller assembly is located inside the impeller housing (1-1). A wind collector ring (3-4) is also provided between the impeller assembly and the left side plate (1-1-1), and the wind collector ring (3-4) is fixedly installed on the inner wall of the left side plate (1-1-1).

6. The energy-saving wind turbine air-cooling system according to claim 1, characterized in that, The motor (3-1) is fixedly mounted on the outer wall of the right side plate (1-1-2) via a flange (3-2).

7. The energy-saving wind turbine air-cooling system according to claim 1, characterized in that, The number of wind turbines (2) is at least one; when the number of wind turbines (2) is multiple, the multiple wind turbines (2) are connected in parallel.

8. The energy-saving wind turbine air-cooling system according to claim 1, characterized in that, The air outlet assembly (1-2) is composed of a first trapezoidal plate and a second trapezoidal plate arranged in parallel and opposite directions, and a third connecting plate and a fourth connecting plate welded between them; the large port of the air outlet assembly (1-2) is connected to the impeller housing (1-1) by fasteners, and the small port is connected to the air inlet of the wind turbine by fasteners.

9. The energy-saving wind turbine air-cooling system according to claim 1, characterized in that, When the real-time air volume is ≤90% of the rated air volume, the electric fan (3) is turned on to supplement the air volume until the real-time air volume exceeds 90% of the rated air volume, and energy-saving operation is performed; when the real-time air volume is ≥110% of the rated air volume, the electric fan (3) is turned off and the air-cooled system operates with zero energy consumption.

10. A wind turbine generator, characterized in that, Includes the energy-saving wind turbine air-cooling system as described in any one of claims 1 to 9.

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