TW202035862A - Wind turbine with helihoist and movable cooler - Google Patents

Abstract

A wind turbine includes a tower, a nacelle disposed on the tower that includes a nacelle roof, a rotor including a hub and at least one wind turbine blade, a helihoist affixed to the nacelle roof, and a cooler slidably mounted to the nacelle and having an exposed wind area operable to remove heat from heat-generating components of the wind turbine. The cooler is slidably movable between a first position and a second position. In the first position, the height of the cooler may be greater than a height of the helihoist, such as a sidewall thereof. In the second position, the cooler may be positioned at a height substantially equal to the sidewall or at a position behind the nacelle.

Description

Wind turbine with helicopter landing platform and movable cooler (2)

Invention field

The present invention generally relates to several types of wind turbines, and more particularly, relates to a wind turbine having a helicopter landing platform and a cooler slidable relative to the helicopter landing platform.

Background of the invention

Wind turbines are used to generate electricity from renewable resources without burning fossil fuels. Generally speaking, wind turbines convert the kinetic energy of wind into electricity. The horizontal axis wind turbine includes a tower, a nacelle on the top of the tower, and a rotor with a plurality of blades supported in the nacelle by shafts. The shaft directly or indirectly couples the rotor with the generator housed in the nacelle. As a result, when the wind forces the blades to rotate, electrical energy is generated by the generator.

The generator components located in the nacelle generate a lot of heat during operation, which then causes the temperature of the air in the nacelle and the generator components to rise. As the generator components heat up, the overall efficiency of power generation may decrease. Therefore, the generator components and the nacelle can be cooled to ensure that the heat does not adversely affect the power generation and/or damage the components.

The conventional wind turbine may include one or more cooling devices, which are configured to remove heat generated during the operation of the wind turbine. The cooling devices may include standard radiators. Another exemplary cooling device is a cooler with a top positioned along one side (eg, top wall or side) of the nacelle and including one or more panels partially enclosed by a cover. The air flowing through the wind turbine cools the second fluid flowing through the panel, which is directed to other heat exchangers in the nacelle to remove heat from the generator components and the nacelle. For this purpose, the cooling devices operate to thereby reduce the temperature of the nacelle and generator components.

The wind turbine may include a helicopter landing platform ("helihoist platform", referred to as "helihoist") on the roof of the nacelle for receiving supplies/personnel from the flying helicopter to the helicopter landing platform. The helicopter landing platform includes the platform and the railing surrounding the platform. Since the helicopter landing platform is configured to support several maintenance technicians, the arrangement of the helicopter landing platform and the cabin is usually restricted by many safety regulations in some countries. For example, the railings of helicopter landing platforms must meet minimum height safety standards. In conventional wind turbines, the helicopter landing platform is generally located at the rear end of the nacelle top wall (for example, opposite to the rotor). In some facilities, the cooler is installed on the rearmost side of the helicopter landing platform (for example, the farthest from the rotor). In order to achieve a good cooling effect, the cooler should be exposed to free-flowing wind, but this also exposes the cooler to strong winds during storms, such as hurricanes and typhoons, and therefore has high structural loads. During the period when the cooler is exposed to high winds, the cooler may be damaged, resulting in higher repair and maintenance costs.

As the amount of electricity generated by each wind turbine increases, so should the necessary cooling capacity. By adding a cooler next to the nacelle, a higher cooling capacity can be achieved near the nacelle. However, this type of cooler is not easy to maintain because it is not easily accessible. In facilities where the cooler is installed on the rear side of the helicopter landing platform, the cooling requirements of the wind turbine may require that the wind area of the cooler is larger than the rear side of the helicopter landing platform. In such facilities, the height of the cooler can be greater than the height of the helicopter landing platform including the railing. This may be a problem during the operation of the helicopter landing platform.

Therefore, there is still a need for a higher cooling capacity while also maintaining an operational and accessible helicopter landing platform.

Summary of the invention

A wind turbine includes a tower, a nacelle arranged on the tower and a nacelle top wall, including a hub and a rotor of at least one wind turbine blade, the rotor being operatively coupled to a generator and fixed to the A helicopter landing platform on the top wall of the nacelle. The helicopter landing platform includes a platform with a working surface and a cooler, which is slidably mounted to the nacelle and is operable to remove heat from the heat generating components of the wind turbine The area affected by wind. The cooler is slidable between a first position and a second position.

In a specific embodiment, the cooler has a first height relative to the platform when in the first position and has a second height relative to the platform when in the second position, wherein the first height is greater than the The second height. The first position may be an operable position so as to maximize the wind receiving area of the cooler. In an exemplary embodiment, the helicopter landing platform has a height and the first height of the cooler is greater than the height of the helicopter landing platform. The helicopter landing platform may further include a side wall surrounding at least a part of the platform, wherein the first height of the cooler is greater than the height of the side wall.

In a specific embodiment, the second position may be a storage position so as to minimize the wind receiving area of the cooler. The cooler may be at least partially vertically behind the nacelle when in the second position, and it is preferable that the cooler be completely vertically behind the nacelle in the vertical direction.

In a specific embodiment, the second position may be a position such that the second height of the cooler is substantially equal to the height of the side wall. Therefore, the helicopter landing platform can meet applicable regulations. In these embodiments, the cooler may form part of the side wall when in at least one of the first and second positions.

A method for operating a wind turbine includes: providing the wind turbine having a tower, a nacelle arranged on the tower and including a nacelle top wall, a rotor including a hub and at least one wind turbine blade, the rotor A helicopter landing platform operatively coupled to a generator and fixed on the top wall of the cabin. The helicopter landing platform has a platform with a working surface, and a cooler, which is installed in the cabin and is operable A wind-receiving area for removing heat from the heat generating component of the wind turbine; and, the cooler is slidably moved from a first position to a second position with respect to the nacelle, wherein the wind-receiving area is at The second position is smaller than when in the first position.

In a specific embodiment, the cooler has a first height relative to the platform when in the first position and a second height relative to the platform when in the second position, wherein the second height is less than The first height. In an exemplary embodiment, the helicopter landing platform has a height and the first height of the cooler is greater than the height of the helicopter landing platform.

In a specific embodiment, the helicopter landing platform may further include a side wall surrounding at least a part of the platform, wherein the first height of the cooler is greater than the height of the side wall.

In a specific embodiment, the step of sliding the cooler further includes: when in the second position, sliding the cooler at least partially vertically behind the nacelle, and the cooler is completely vertical in the vertical direction. The back of the cabin is better.

In a specific embodiment, the step of sliding the cooler further includes: sliding the cooler vertically so that the second height of the cooler is substantially equal to the height of the side wall. In this configuration, the helicopter landing platform can be operated for helicopter landing operations without the cooler extending above the safety barrier in the form of the side wall.

In the context of this application, the term "helicopter landing and landing operations" shall be regarded as including the landing and take-off of aerial vehicles or the transfer of personnel and/or equipment from orbiting aerial vehicles.

Examples of aerial vehicles include unmanned aerial vehicles such as drones and vertical take-off and landing vehicles such as helicopters.

In a specific embodiment, a helicopter landing operation is performed with the cooler in the second position.

In a specific embodiment of a helicopter landing platform without sidewalls, the second position of the cooler includes a position where the top surface of the cooler is flush or longitudinally lower than the top surface of the platform.

In a specific embodiment of a helicopter landing platform with side walls, the second position of the cooler includes a position where the top surface of the cooler is flush or longitudinally lower than the top surface of the side wall.

In another specific embodiment that can be combined with all other specific embodiments of the helicopter landing platform, the wind turbine of the present invention includes a biasing member for biasing the cooler toward the second position.

In the event of failure of the main system for moving the cooler and keeping it in the first position, the cooler will automatically move to the second position. The second position is the position where the cooler is substantially behind the rear side of the nacelle so as to be less exposed to extreme winds such as during a typhoon. Therefore, the cooler will move behind the nacelle during extreme wind conditions and reduce the impact of wind on the wind turbine generator, even if the main system for moving the cooler fails. This is highly advantageous because such a redundant system for reducing the wind influence on the cooler allows the design of wind turbine generators that only have a lower wind influence when the cooler is in the second position.

In addition, the second position allows the helicopter to approach the turbine so that maintenance personnel can take off and land or lift off the helicopter landing platform to enable repairs to the failure system.

In a specific embodiment, the biasing member is a spring mechanism.

In another specific embodiment, the biasing member works with the assistance of gravity. For example, the cooler is moved up and down relative to the helicopter landing platform via a lifting system. The exemplary lifting system may include a gear and pinion, an electric actuator, a hydraulic actuator, or a chain and gear. The biasing member is integrated with the lifting system.

In a lifting system that includes gears and pinions, the thread has an angle that causes the cooler to move toward the second position under the influence of gravity when the power source of the gear is cut off. This also applies to systems with electric actuators.

For a lifting system that includes a hydraulic actuator, if the hydraulic pressure is cut off, the oil is allowed to return to the storage tank to allow the cooler to move to the second position under the action of gravity.

Regarding the chain and gear-based lifting system, the gear should allow the cooler to move toward the second position when there is no power.

A specific embodiment of the lifting system may include a spring that pushes the cooler toward the second position when gravity is insufficient to move the cooler, and ensures that the acceleration of the cooler is small enough to prevent the cooler from reaching the second position when the lifting system suddenly loses power. Damper damaged by moving too fast in the second position.

1, the wind turbine 10 includes a tower 12, a nacelle 16 arranged on top of the tower 12, and a rotor 14 operatively coupled to a generator 26 housed in the nacelle 16. In addition to the generator 26, the nacelle 16 houses various necessary components for converting wind energy into electrical energy and various components required to operate, control, and optimize the performance of the wind turbine 10. The tower 12 supports the load represented by the nacelle 16, the rotor 14 and other components of the wind turbine 10 housed in the nacelle 16, and can also operate to raise the nacelle 16 and the rotor 14 to a height above ground level or sea level, as appropriate However, here you can find less turbulent and faster moving airflow.

The rotor 14 of the wind turbine 10 represented as a horizontal axis wind turbine is used as the prime mover of the electric motor system. Wind power exceeding the minimum level will activate the rotor 14 and cause a rotation in a substantially vertical direction with respect to the wind direction. The rotor 14 of the wind turbine 10 includes a central hub 18 and at least one blade 20 protruding outward from the central hub 18. In this representative embodiment, the rotor 14 includes three blades 20 distributed circumferentially around the central hub 18, but the number can be changed. The wind turbine blades 20 are configured to interact with the passing airflow to generate a lift force that causes the rotor 14 to spin generally in the plane defined by the blades 20. The tower 12 includes a base 24 fixed to a supporting surface 22, for example, the supporting surface 22 may be the ground or any other suitable supporting surface, including an offshore platform.

In order to provide cooling of the generator 26 and other heat-generating components related to the wind turbine 10, the wind turbine 10 of the first embodiment includes a cooler 30 as shown in FIG. 2A. The wind turbine 10 also includes a helicopter landing platform 32, for example, which is used to receive turbine components and/or maintenance technicians that take off and land from a suspended helicopter or landing aerial vehicle. The nacelle 16 has a nacelle top wall 34 attached to the helicopter landing platform 32. The helicopter landing platform 32 has a platform 36 that is completely surrounded by, for example, a protective barrier fixed to the side wall 38 of the platform 36. The side wall 38 may be high enough for a service technician to work on the platform 36 without having to be tied to the platform 36 or the side wall 38. In a specific embodiment, the cooler 30 can extend across the full width of the rear edge of the platform 36 and the height can be substantially the same as the side wall 38 that can be disposed in front of the cooler 30. In addition to the side walls 38 shown in FIGS. 2A and 2B, other protective barrier configurations can also be used, as long as these protective barrier configurations can prevent the maintenance technician from falling off the platform when the rope is not tethered.

The embodiment of the aerial vehicle that can land on the helicopter landing platform 36 may be an unmanned aerial vehicle (UAV) or a so-called unmanned aerial vehicle or helicopter, wherein, at least in the latter case, the helicopter landing platform 36 should have no barriers.

Figure 2A illustrates the cooler 30 in the first or normally operational position. That is, the cooler 30 is positioned at the uppermost position relative to the helicopter landing platform 32 so that the cooler 30 can receive the optimal airflow to cool the generator 26 and other components contained in the nacelle 16. When in the normal operational position, the front face 42 of the cooler 30 has the largest wind-receiving area, that is, the largest surface area exposed to wind. According to one aspect of the present invention, for example, during a storm, hurricane, or typhoon, when the wind turbine 10 is exposed to excessive high winds, the cooler 30 can move downward relative to the helicopter landing platform 32 so that the cooler 30 is substantially behind the nacelle 16 Side of the back, as shown in Figure 2B. The term "behind" means that the front face 42 of the cooler 30 faces the rear wall of the nacelle 16 so that at least a portion of the cooler 30 does not experience oncoming wind. In Figure 2B, the cooler 30 is in the second position. In this embodiment, the second position is the storage position where the cooler 30 is in the lowest vertical position, where it is flush with or lower than the surface of the platform 36. When in the storage position, the front face 42 of the cooler 30 has the smallest wind-receiving area, that is, the smallest surface area exposed to wind. In order to facilitate the downward movement of the cooler 30, the cooler 30 may include a sliding guide 40 fixed to the front surface 42 of the cooler 30. The sliding guide 40 engages a complementary stationary guide member 44 fixed to the rear edge of the platform 36. In a specific embodiment, the sliding guide 40 and the stationary guide member 44 can be assembled so that the cooler can slide vertically between the operable position and the storage position. The cooler 30 moves up and down with respect to the helicopter landing platform 32 via a lifting system 46 such as gears and pinions, electric or hydraulic actuators, chains and gears, or other actuation systems. It should be understood that in addition to the sliding guide 40 and the stationary guide member 44 shown in FIGS. 2A and 2B, other mechanical configurations that move the cooler 30 up and down with respect to the helicopter landing platform 32 may be used.

In another aspect of the present invention, the cooler 30 can also be moved to the second position, which is an intermediate position (not shown) between the normal operational position (Figure 2A) and the storage position (Figure 2B). When in this intermediate position, the cooler 30 has an intermediate wind receiving area that is smaller than the maximum wind receiving area and larger than the minimum wind receiving area. In this way, the wind may be reduced, but some degree of cooling can still be provided. In other words, the cooler 30 is still operable in the intermediate position, but its capacity is probably reduced compared to when in the normal operable position.

In another aspect of the invention, the nacelle 16 may include an anemometer, that is, a wind sensor 48 (e.g., cup, hot wire, pressure tube, ultrasonic, laser dopper) that monitors the wind speed in or near the nacelle 16 Le etc.). The wind sensor 48 is operatively coupled to the controller 50, and it can be configured to move the cooler 30 from the normal operational position to the storage position when the wind reaches a predetermined critical wind speed. For example, the wind turbine can reduce its production at a wind speed higher than a first critical value, such as 25 m/s, and completely stop its production when the wind speed increases above a second critical value, such as 30 m/s, so that The controller 50 is configured so that the cooler 30 can be lowered to an intermediate position and continue to operate at a reduced capacity between the first and second critical values and drop to the storage position at a higher wind speed to protect the cooler 30. The controller 50 can be configured to move the cooler 30 back to a normal operational position after the wind falls below the above-mentioned critical value for a predetermined period of time, for example, for a period of at least 30 minutes. The wind turbine 10 may also include a manual control that a maintenance technician can use to move the cooler 30 between the operable, intermediate, and storage positions.

Although the side wall 38 completely surrounds the platform 36 in FIGS. 2A and 2B, it should be understood that the rear side of the side wall 38 can be excluded and the cooler 30 in an operational position can be used as a protective barrier at the rear edge of the platform 36. In this configuration, the cooler 30 can extend across the full width of the rear edge of the platform 36 and the height can be substantially the same as the side wall 38 of the helicopter landing platform 32.

As the amount of electricity generated by each wind turbine increases, so should the necessary cooling capacity. In order to provide cooling of the generator 26 and other heat-generating components related to the wind turbine 10, the wind turbine 10 according to the second embodiment includes a cooler 60, which is similar in configuration and function to the cooler 30 but has a height greater than the side wall of the helicopter landing platform The height of 38 is shown in Figure 3A to Figure 3D. This larger cooler 60 is intended to provide greater cooling capacity than the smaller cooler 30. The component symbols of the first embodiment (FIG. 2A to FIG. 2B) are used for the similar structure of the second embodiment. The second specific embodiment includes a helicopter landing platform 32 with side walls 38 and a helicopter landing platform 32 platform 36. As shown in FIG. 3A, the cooler 60 spans the full width of the rear edge of the platform 36. However, it should be understood that, in another specific embodiment, the width of the cooler 60 may be greater than the full width of the rear edge of the platform 36 so that the side of the cooler 60 extends beyond the width of the platform 36 and the side wall 32. Similar to the first embodiment, the cooler 60 can be moved between a first or normal operational position (FIG. 3A and FIG. 3B) and a second or storage position (FIG. 3D). When in the normal operational position, the front 64 of the cooler 60 has the largest wind-receiving area, that is, the largest surface area exposed to wind. When in the storage position, the front face 64 of the cooler 60 has the smallest wind-receiving area, that is, the smallest surface area exposed to wind. To facilitate vertical movement, the cooler 60 may include a sliding guide 62 fixed to the front face 64 of the cooler 60. The sliding guide 62 engages a complementary stationary guide member 66 fixed to the rear edge of the platform 36. The sliding guide 62 and the stationary guide 66 can be assembled to cause the cooler 60 to slide vertically between the operable and storage positions. The cooler 60 moves up and down with respect to the helicopter landing platform 32 via a lifting system 46 such as gears and pinions, electric or hydraulic actuators, chains and gears, or other actuation systems. It should be understood that in addition to the sliding guide 62 and the stationary guide member 66 shown in FIG. 3A, other mechanical configurations can be used to move the cooler 60 up and down with respect to the helicopter landing platform 32.

By positioning the cooler 60 at the operable position as shown in FIGS. 3A and 3B, the cooler 60 can be the highest point of the wind turbine 10 except for the blades 20. In countries where safety standards require that the helicopter landing platform 32 (e.g., including the sidewall 38) be the highest point of the wind turbine 10 except for the blades 20, the operable position of the cooler 60 may provide the helicopter landing platform 32 outside of applicable regulations. In addition, the height of the cooler 60 may prevent receiving supplies/personnel from the suspended helicopter landing to the helicopter landing platform 32. In another aspect of the present invention, the cooler 60 can be moved to the second position, which is an intermediate position somewhere between the normal operational position (FIG. 3A and FIG. 3B) and the storage position (FIG. 3D). As shown in FIG. 3C, for example, the cooler 60 can be lowered to an intermediate position so that the highest point of the cooler 60 is substantially equal to the highest point of the helicopter landing platform 32, which is the highest point of the side wall 38 in FIG. 3C. In this way, the cooler 60 is no higher than the side wall 38 of the helicopter landing platform 32 to comply with applicable regulations and also to provide an operational and accessible helicopter landing platform 32.

The term intermediate position means the intermediate position as shown in FIG. 3C or any other position between the normal operational position (FIG. 3A and FIG. 3B) and the storage position (FIG. 3D). When in the middle position, the cooler 60 has a middle wind receiving area smaller than the maximum wind receiving area and larger than the minimum wind receiving area. In addition, the wind may be reduced, but some degree of cooling can still be provided. In other words, the cooler 60 is still operable when in the intermediate position, but is probably reduced compared to the capacity when in the normal operable position.

In another aspect of the second embodiment, the nacelle 16 may include a wind sensor 48 for monitoring the wind speed at or near the nacelle 16. The wind sensor 48 is operatively coupled to the controller 50, and it can be configured to slide the cooler 60 from the normal operational position to the storage position when the wind reaches a predetermined critical wind speed. For example, the wind turbine 10 can reduce its production at a wind speed higher than a first critical value, such as 25 m/s, and completely stop its production when the wind speed increases above a second critical value, such as 30 m/s, so that The controller 50 is configured to allow the cooler 60 to slide to the intermediate position and continue to operate at a reduced capacity between the first and second critical values and slide to the storage position at a higher wind speed to protect the cooler 60. The controller 50 can be configured to move the cooler 60 back to a normal operational position after the wind drops below the above-mentioned critical value for a predetermined period of time, for example, a period of at least 30 minutes. The wind turbine 10 may also include a manual control that can be used by a maintenance technician to move the cooler 60 between operable, intermediate, and storage positions.

Although the side wall 38 completely surrounds the platform 36 in FIG. 3A, it should be understood that the rearward side wall 38 can be excluded and the cooler 60 in the operational position can be used as a protective barrier at the rear edge of the platform 36. The cooler 60 can also be used as a protective barrier when in the middle position, as long as the top of the cooler 60 is at least as high as the top of the side wall 38.

It should be further understood that, in an alternative embodiment, the platform 36 may not have the sidewall 32 surrounding it as in the embodiment of FIGS. 2A, 2B, and 3A. In this case, the helicopter landing platform constitutes a helipad, where UAV, UAV, helicopter or other aircraft can land. Without any side walls 32, UAVs, drones or helicopters can land on the platform 36. However, without the side wall 32, for example, in order to work on the platform 36, the service technician may need to be tied to the platform 36. In this specific embodiment, several aspects of the present invention can be used to position the cooler at a height substantially equal to the height of the platform so that the platform forms the highest level (not including blades). For example, when in this position, the cooler may be in or near the storage position.

A helicopter landing operation can be performed when the cooler 60 is in the position shown in FIG. 3C or 3D.

Although the present invention has been illustrated with descriptions of various preferred specific embodiments and although these specific embodiments have been described in some details, the scope of the appended patent claims of the applicant’s invention in this case should not be limited or limited in any way Such details. Those who are familiar with this art understand that there are additional advantages and modifications. Therefore, depending on the user's needs and preferences, the various features of the present invention can be used alone or in any combination.

10: Wind turbines 12: Tower 14: Rotor 16: cabin 18: Central hub 20: Blade 22: Support surface 24: Base 26: Generator 30: cooler 32: Helicopter landing platform 34: Engine Room Top Wall 36: Platform 38: sidewall 40: Sliding guide 42: front 44: Complementary stationary guiding member 46: Lifting system 48: Wind sensor 50: Controller 60: cooler 62: Sliding guide 64: front 66: complementary stationary guiding member

The drawings incorporated into this patent specification and constituting a part of it illustrate one or more specific embodiments of the present invention, and are used to explain the present invention together with the above [Summary of the Invention] and the following [Embodiments]. Figure 1 is a perspective view of a wind turbine; Fig. 2A is a partial perspective view showing the nacelle of the wind turbine of Fig. 1, which includes a cooler and a helicopter landing platform configuration according to the first specific embodiment, wherein the cooler is in an operational position; Figure 2B is a partial perspective view showing the cooler and helicopter landing platform configuration of Figure 2A, where the cooler is in a storage position; Fig. 3A is a partial perspective view showing the nacelle of the wind turbine of Fig. 1, which includes a cooler and a helicopter landing platform configuration according to a second specific embodiment, wherein the cooler is in an operational position; The partial side view of FIG. 3B illustrates the cooler and helicopter landing platform configuration of FIG. 3A, where the cooler is in an operational position; The partial side view of FIG. 3C illustrates the cooler and helicopter landing platform configuration of FIG. 3A, where the cooler is in the middle position; and Figure 3D is a partial side view of the cooler and helicopter landing platform configuration of Figure 3A, where the cooler is in the storage position;

16: cabin

32: Helicopter landing platform

34: Engine Room Top Wall

36: Platform

38: sidewall

46: Lifting system

48: Wind sensor

50: Controller

54: positive

60: cooler

62: Sliding guide

66: Complementary stationary guiding member

Claims (16)

A wind turbine comprising: One tower A nacelle arranged on the tower and including a nacelle top wall; A rotor including a hub and at least one wind turbine blade, the rotor being operatively coupled to a generator; and A helicopter landing platform fixed on the top wall of the cabin, the helicopter landing platform having a platform with a working surface; and A cooler, which is slidably mounted to the nacelle and has a wind-receiving area, which is operable to remove heat from the heat generating components of the wind turbine, wherein the cooler is in a first position and a second position Slidably move between. Such as the wind turbine of claim 1, wherein the cooler has a first height relative to the platform when in the first position and a second height relative to the platform when in the second position, and wherein the first height A height is greater than the second height. Such as the wind turbine of claim 1 or 2, wherein the first position is an operable position, so that the wind receiving area of the cooler is maximized. Such as the wind turbine of claim 2 or 3, wherein the helicopter landing platform has a height, and wherein the first height of the cooler is greater than the height of the helicopter landing platform. The wind turbine of claim 4, wherein the helicopter landing platform further includes a side wall surrounding at least a part of the platform, and wherein the first height is greater than the height of the cooler of the side wall. The wind turbine of any one of claims 1 to 5, wherein the second position is a storage position, so that the wind receiving area of the cooler is minimized. Such as the wind turbine of claim 6, wherein the cooler is at least partially vertically behind the nacelle when in the second position, preferably, the cooler is positioned completely vertically behind the nacelle in the vertical direction. The wind turbine of claim 5, wherein the second position is a position that causes the second height of the cooler to be substantially equal to the height of the side wall. The wind turbine of claim 5, wherein, when in at least one of the first and second positions, the cooler forms a part of the side wall. A method for operating a wind turbine, which includes: Provided is a wind turbine having a tower, a nacelle arranged on the tower and including a nacelle top wall, including a hub and a rotor of at least one wind turbine blade, the rotor being operatively coupled to a generator and fixed A helicopter landing platform on the top wall of the nacelle, the helicopter landing platform has a platform with a working surface, and a cooler installed in the nacelle and operable to remove heat from the heat generating components of the wind turbine Of a wind-receiving area; and The cooler is slidably moved from a first position to a second position relative to the nacelle, wherein the wind-receiving area when in the second position is smaller than when in the first position. Claim 10 is a method for operating a wind turbine, wherein the cooler has a first height relative to the platform when in the first position and a second height relative to the platform when in the second position, and Wherein, the second height is smaller than the first height. For example, claim 11 is a method for operating a wind turbine, wherein the helicopter landing platform has a height, and wherein the first height of the cooler is greater than the height of the helicopter landing platform. The method for operating a wind turbine according to claim 12, wherein the helicopter landing platform further includes a side wall surrounding at least a part of the platform, and wherein the first height of the cooler is greater than the height of the side wall. The method for operating a wind turbine in any one of claim 10 to 13, wherein the step of slidably moving the cooler further comprises: making the cooler at least partially vertical when in the second position The ground is slidably movable behind the nacelle, and preferably, the cooler is positioned completely vertically behind the nacelle in the vertical direction. The method for operating a wind turbine according to claim 13, wherein the step of slidably moving the cooler further comprises: making the cooler slidably move vertically so that the second height of the cooler is substantially equal to the side wall the height of. Such as the method for operating a wind turbine in any one of claims 10 to 15, wherein a helicopter landing operation is performed when the cooler is in the second position.

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