CN111279074A - Ventilation and water-gas separation system for wind driven generator - Google Patents

Abstract

The invention relates to a ventilation or water-gas separation system for a wind turbine having a wind turbine hub which supports blades and is arranged on a nacelle rotatably about a rotational axis. The wind turbine hub is protected by a spinner that isolates the exterior from the interior and is arranged to rotate with the wind turbine hub. The system has an inlet in the spinner and an outlet inside the wind turbine.

Description

Ventilation and Water Separation Systems for Wind Turbines

technical field

The present invention relates to a ventilation or water vapor separation system for a wind generator having a wind generator hub supporting blades arranged to rotate about an axis of rotation supported by the nacelle. The wind turbine hub is protected by a spinner which isolates the outside from the inside and is arranged to rotate with the wind turbine hub. The system has an inlet in the spinner and an outlet inside the wind turbine.

technical field

The increased size of modern wind turbines has led to increased awareness and attention to thermal control of heat generating components in the hub and nacelle of wind turbines. The need for thermal control is due to increased frictional heat from major components such as main bearings, gearboxes, generators, inverters and control/monitoring electronics. The increased size of the main components also increases the risk of having large thermal stresses caused by temperature differences within the confines of the main components such as the main bearing unit.

Thermally controlled cooling air can be actively delivered by a power unit such as a fan with or without a compressor, or passively by using natural air convection. The advantages of charge air convection are higher cooling influence and higher cooling controllability. The advantages of passive air convection are low cost and simple concept.

A common method of separating rainwater from dry air in ambient air inlets is to force the air flow through multiple channels of angled baffle plates or so-called "baffles" so that heavier raindrops are driven off the baffle surface by centrifugal force effects out. Baffle separator units are typically live powered devices because airflow through multiple baffles is severely blocked, with associated head loss, which must actively force airflow through.

WO2014/020639A1 discloses a system for ventilating the interior of a horizontal-axis wind turbine, and relates to the same technical field and technical problem of ventilation of the interior of a wind turbine.

Purpose of invention

It is an object of the present disclosure to provide a passive and operational system and a method for ventilating the interior of a wind turbine such as the hub and nacelle.

SUMMARY OF THE INVENTION

One object is achieved by a water vapor separation system for a wind turbine having a wind turbine hub supporting blades arranged to rotate about an axis of rotation supported by the nacelle. The wind turbine hub is protected by a spinner which separates the outer from the inner and is arranged to rotate with the wind turbine hub. The water vapor separation system is configured to have the following features.

The spinner has a spinner front which is arranged on the outside to face away from the nacelle in the yaw direction (compass heading) during intended operation. The spinner front has an inlet that connects the outside to the inside through a channel with a channel face connecting the inlet to the outlet in the inside.

The system has a cavity with a cavity face. The cavity face may be penetrated at least once to the cavity drain.

The cavity partially surrounds the capture body, which has a capture body face and is suspended in the cavity. The capture body has a capture body front face facing the inlet and a capture body back face extending away from the front face and towards the outlet. The capture volume basically defines the volume.

The described system enables passive ventilation of the interior of the wind turbine in an efficient manner. The system also enables separation of water and air during generally wet adverse weather conditions such as rain, snow, hail, etc., thereby enabling ventilation during other adverse weather conditions.

The described system also enables passive ventilation without disturbing or minimally affecting the wind conditions of the wind turbine during operation.

The described system even provides laminar air flow, substantially laminar air flow, or well-conditioned air flow into the interior of the wind turbine for a variety or wide range of wind flow conditions.

The disclosed system also overcomes or ameliorates the existing disadvantages of passive air convection, wherein air mass flow may be insufficient during effective operating periods of low wind and/or periods of high ambient temperature. The disclosed system enables or improves convective inflow of air into the hub/nacelle by providing as unobstructed flow channels or means as possible so that free flow ambient wind can e.g. pass directly upstream wind at the apex of the hub. The holes go directly into the wind turbine.

Instead of allowing unimpeded direct inflow of ambient wind - which has the disadvantage of allowing precipitation such as rain, snow, hail, etc. to enter the hub - the system also eliminates or reduces water entry into the hub and nacelle where water The corrosion process will be accelerated and the potential risk of electrical short circuits will be increased.

During operation, ie when the rotor is rotating, the disclosed system constitutes an air-rain or air-water separator for a wind turbine hub, wherein the rain is separated by centrifugal force in a manner that minimizes head loss, so that the device Will work efficiently in passive mode without the need for an external energy source to force flow through.

The inlet, cavity and capture body form a channel or conduit. The faces of the respective portions may overlap, but collectively form a channel with channel faces. A person skilled in the art can understand parts or sections, and in general can make transitions and integrations. With operational experience gained, one skilled in the art can also be induced to modify or adjust the curvature of relevant devices, surfaces, to prevent adverse effects from being experienced.

The passage face may have an outward passage face, which is mainly formed by the inlet face and the cavity face. The channel face may have an inwardly directed channel face formed primarily by the capture body face.

In one aspect, the channel face is substantially symmetrical about the axis of symmetry. The axis of symmetry may be substantially aligned with the axis of rotation during intended operation. Thereby the channel face is rotated and the shape of the channel relative to the fluid is substantially maintained.

As a result, the channel surface can be designed to be symmetrical about the axis of symmetry. In one aspect, the system may be installed in alignment with the axis of rotation of the rotor during operation of the wind turbine. Therefore, rotating the drain guides the water towards the outlet of the drain.

The placement and/or actual symmetry of the capture body suspension may have degrees of freedom. Thus, the capture body may be suspended by a capture body suspension that follows the symmetry, or the capture body suspension may for example use three suspensions to break the symmetry.

In one aspect, the capture face is substantially symmetrical about an axis of symmetry. The axis of symmetry may be substantially aligned with the axis of rotation during intended operation. Thereby, part of the channel face is formed and substantially maintains its shape relative to the fluid when rotated.

The front face of the capture body may be substantially symmetrical about the axis of symmetry. The back face of the capture body may be substantially symmetrical about an axis of symmetry.

Those skilled in the art will recognize that asymmetry can be introduced by the attachment or connection of the capture body attachment means. Also, for example, the dorsal side of the capture body may have features that introduce asymmetry.

In one aspect, guide means may be arranged on the capture body. In one aspect, there may be guide means along the front face of the capture body, which guide means are arranged from the most forward center point and extend in the flow direction. Such guides can deviate from perfect symmetry.

In one aspect, the capture body has a capture body front face that faces the inlet and is arranged to cover more than the projection of the inlet aperture onto the capture body. The capture body may have a capture body front face arranged to cover more extension than the inlet aperture.

Thus, from a point of view along the common axis of symmetry or when mounted along the axis, the capture body covers the inlet aperture area. Thus, it is allowed to capture most of the water and distribute the air flow radially towards the face of the cavity during rain and downtime.

In one aspect, the capture body has a capture body back surface that is shaped to have a curvature that is more curved than the curvature of the capture body front surface.

The front of the capture body can be relatively flat, but curved. The capture body front face is arranged at a distance from the inlet aperture and has a curvature in order to form a convergent smooth and aerodynamically strong inlet portion of the channel. The capture body may be arranged in the cavity such that the front face of the capture body is downward from the inlet aperture. The front of the capture body can be close to or across the entrance aperture. In one aspect, the capture body can be adjusted along the axis to adjust the size and fluid properties of the inlet portion of the channel; including closing the channel or inlet aperture.

The back of the capture body may be shaped in view of the cavity to form a channel portion that converges towards the outlet. The back of the capture body may also have a more curved curvature than the front.

In one aspect, the capture body is arranged in the cavity, wherein the cavity face and the capture body face are shaped such that the channel converges from the inlet towards the minimum channel width and diverges from there towards the outlet.

Due to the convergence, the fluid will accelerate and cause the fluid to have a favorable pressure gradient.

Aspects of this will be described in detail below.

In one aspect, the channel has an inlet center streamline centered between the cavity face and the capture body face, and an outlet center streamline 330 centered between the cavity face and the capture body face, wherein the cavity face and the capture body face are shaped and The arrangement is such that the inlet center streamline and the outlet center streamline turn at a corner, the corner being at least 70 degrees. A corner of about 90 degrees may also be a suitable starting point. The corners can be changed or adjustable or different during operation.

The outlined and proposed definitions of the corners provide at least a starting point for achieving favorable flow patterns and separation of water and gas, wherein the inner channel surface of the channel is the surface of a smooth bluff body that axisymmetric the fluid The ground is directed radially outwards and then radially inwards, so that a turning angle of the inwardly curved flow, eg at least 70 degrees, will result in centrifugation of the rainwater.

The outer channel surface (ie on the cavity face) is offset from the inner channel surface (ie on the capture body face) so that the channel cross-sections converge, thereby causing the fluid to accelerate and cause the fluid to have a favorable pressure gradient so that fluid separation is avoided and stop. Furthermore, head loss is minimized.

In one aspect, the spinner front face is substantially symmetrical about the axis of symmetry and has a forwardmost stagnation point in radial cross-section. From the stagnation point towards the cavity, the spinner has an aerodynamically shaped inlet face.

The stagnation point or perimeter of the stagnation point divides the wind flow into two parts. An outer portion externally guides the wind flow through the fan in a manner intended for the generation of electrical energy. Another interior portion directs a portion of the wind flow to the interior through the disclosed ventilation or water vapor separation system. The segmentation of the wind flow is as non-intrusive as possible according to the present disclosure.

The inlet face forms a portion of the channel face from the stagnation point or perimeter of the stagnation point to the inlet aperture point or perimeter of the inlet aperture. The inlet face may be aerodynamically shaped. The surrounding area of the stagnation point or perimeter may be aerodynamically shaped. The transition from the inlet face to the cavity face can also be curved, smooth or aerodynamically shaped.

In general, the system may be equipped with drainage for removing the collected water from the system. Drainage means may be holes, perforations and the like. A person skilled in the art places the drainage device in a low point or valley of gravity. Drains or holes may also be present below the flow direction to catch water being forced upwards when running or encountering fluids.

Water from the rainwater will be captured on the radially outward channel surfaces and directed through surface holes or slits connected to hoses that drain the water out of the hub and out to the surrounding environment or outside .

In one aspect, the cavity drain may penetrate the cavity face at about the maximum width or at the valley of gravity. The drain may be shaped as a helix that spirals towards the spinner inlet penetrating the spinner front face, the helical travel of the helix being threaded according to the intended direction of rotation of the rotor. This should be equivalent to a right-hand thread for a right hand. Therefore, rotating the drain guides the water towards the outlet of the drain.

Thus, rainwater or moisture trapped on the surface of the outward channel is directed through surface holes or gaps connected to hoses or drains, which then swirl back toward the inlet, where the water can be deal with it. The rotation of the hose is arranged so that water trapped in the low section of the hose or drain winding will return or travel upstream towards the air inlet due to the rotational movement of the hub itself.

Similarly, a reverse spiral drainage arrangement can be implemented. In one aspect, the cavity drain may penetrate the cavity face at about the maximum width or or where gravity is low, and be shaped as a helix that spirals towards the outlet and penetrates the spinner face. The penetration can be down from the stagnation point. The helical progression of the helix is in the opposite direction to the intended direction of rotation of the rotor to form the thread. This should be equivalent to a left-hand thread for a right hand. Thus, turning the drain will direct water towards the outlet of the drain and downstream from the penetration or hole in the cavity.

The disclosed ventilation or moisture system for passively collectively driving airflow through the rain separator may be further driven by an active fan positioned downstream of the separator. In an example, the location of the active fan may be at the hub-nacelle sliding interface opening, or within the nacelle where fluid is allowed to propagate through the hub into the nacelle.

At a suitable location or connecting section, drop catchers may be mounted along the perimeter of the outward channel face at a trailing edge edge axial location, the drop catchers being shaped in an L shape, the L shape Surface-rolling droplets will be captured and prevented from being captured by the channel air jet and propagating into the interior of the hub.

The water separation system outlined can also be extended with a funnel or cavity extension.

In one aspect, the ventilation or water vapor separation system may further comprise a funnel disposed between the cavity and the outlet. Thus, the downstream outlet of the funnel will form the outlet of the system. The funnel has a funnel inlet aperture complementary to the cavity outlet aperture, and a funnel face that forms the portion of the channel face from the cavity face to the outlet.

In one aspect, the funnel face is substantially symmetrical about the axis of symmetry. The axis of symmetry may be substantially aligned with the axis of rotation during intended operation.

In one aspect, the funnel face has at least one primary funnel radius around which the funnel face is penetrated at least once to the funnel drain.

One object may be achieved by aeration or separation of water and air using the disclosed water vapor separation system.

Description of drawings

Embodiments of the present invention will be described in the accompanying drawings, in which:

Figure 1 shows a wind turbine with a spinner;

Figure 2 shows a water gas separation system with indicative streamlines;

Figure 3 shows a water gas separation system;

Figure 4 shows details of the connection of the formed waterstop;

Figure 5 shows details of the funnel drain;

Figure 6 shows the arrangement of the cavity drain;

Figure 7 shows the arrangement of the helical cavity drain; and

Figure 8 shows an embodiment of a capture body having a capture body front and a capture body back that are phase separated.

Detailed ways

Figure 1 shows a wind turbine 1000 having a wind turbine hub 1040 supporting blades 1050 arranged to rotate about an axis of rotation 1060 supported by a nacelle 1020, the wind turbine hub 1040 being subjected to a rotator 200, the rotator 200 isolates the outer 1100 from the inner 1110 and is arranged to rotate with the wind turbine hub 1040.

In the following, the water vapor separation system will be described with reference to the wind turbine 1000 and the operation of the wind turbine 1000 .

FIG. 2 shows a water gas separation system 100 with reference to a wind turbine (WTG) such as that shown in FIG. 1 . FIG. 2 shows the flow of air 110 and water 120 . FIG. 3 details aspects of the water vapor separation system 100 from FIG. 2 . In the following, details of the water gas separation system 100 are referred to FIGS. 2 and 3 .

FIGS. 2 and 3 show a water vapor separation system 100 for a wind turbine 1000 having a wind turbine hub 1040 supporting blades 1050 arranged to be supported around a nacelle 1020 Rotation axis 1060 rotates. The wind turbine hub 1040 is protected by a spinner 200 which separates the outer 1100 from the inner 1110 and is arranged to rotate with the wind turbine hub 1040 .

The water vapor separation system 100 is configured with a spinner 200 having a spinner front face 210 disposed outboard 1100 to face a yaw direction 1070 (compass heading) during intended operation. The spinner front face 210 has an inlet 220 connecting the outer 1100 to the inner 1110 through a channel 300 with a channel face 310 connecting the inlet 220 to the outlet 230 in the inner 1110. The inlet 220 has an inlet aperture 222 .

From outside 1110 , the flow lines of air 110 and water are shown as air flow lines 112 and water flow lines 122 . Streamlines are shown entering inlet 220 and may flow to outlet 230 . As is apparent, the air flow line 112 enters the inlet 1110, while the water flow line 122 is shown captured in the water gas separation system 100 and the water 120 is directed to a drainage device to be described later.

The water-air system 100 has a cavity 400 having a cavity face 410 . The cavity 400 is penetrated at least once to the cavity drain 450 .

The cavity 400 partially surrounds the capture body 500 , which has a capture face 510 and is suspended in the cavity 400 by a plurality of capture suspensions 520 .

The capture suspension 520 is here a rod attached to the cavity face 410 and the capture body 500 . The suspension may be aerodynamically shaped in the flow direction.

In this embodiment, the channel face 310 is substantially symmetrical about an axis of symmetry 1200 that is substantially aligned with the axis of rotation 1060 (not shown) during intended operation of the wind turbine.

The capture face 510 is substantially symmetrical about an axis of symmetry 1200 that is substantially aligned with the axis of rotation 1060 during intended operation. The cavity body 500 itself may be symmetrical. Cavity body 500 is shown suspended symmetrically such that it rotates symmetrically about axis of rotation 1060 .

The capture body 500 has a capture body front face 512 that faces the inlet 220 and is arranged to cover more than the projection of the inlet aperture 222 . That is, the area of the cross section of the capture body front face 512 is larger than the area of the inlet aperture.

The capture body 500 has a capture body back 514 facing the outlet 230 . The back side 514 is here shaped to have a curvature that is more curved than the curvature of the front side 512 of the capture body.

It can be seen that the capture body 500 is seen here as a slightly skewed ovoid body. The capture body 500 has an aerodynamically shaped capture body surface 510 .

The water vapor separation system 100 has a capture body 500 arranged in the cavity 400 . Cavity face 410 and capture body face 510 are shaped so that channel 300 converges from inlet 220 towards the minimum channel width and diverges from there towards outlet 230 .

As shown in FIG. 3 , the water vapor separation system 100 has the cavity 400 and the cavity body 500 arranged such that the channel 300 has an inlet center streamline 320 centered between the cavity face 410 and the capture body face 510 , and a Outlet center streamline 330 centered between cavity face 410 and capture body face 510 . Cavity face 410 and capture body face 510 are shaped and arranged such that inlet center streamline 320 and outlet center streamline 330 turn at corner 350 . The corner 350 is at least 70 degrees.

From FIG. 3 , the spinner front face 210 is substantially symmetrical about the symmetry axis 1200 . In radial cross section, it can be seen that the spinner front face 210 has a stagnation point 250 that is most forward, ie in the yaw direction. From stagnation point 250 towards cavity 400 , inlet 220 has an aerodynamically shaped inlet face 260 .

The faces, and including the transition from one face to the other, are generally smooth and aerodynamically shaped. Thus, the channel face 310 is generally smooth and aerodynamically shaped.

The water vapor separation system 100 including the funnel 600 can also be seen in FIGS. 2 and 3 . The water vapor separation system 100 may not have the funnel 600 .

Where there is a funnel 600 in the water gas separation system 100, the funnel 600 is arranged between the cavity 400 and the outlet 230, which in this case is the outlet of the funnel 600, which is shown here as a funnel outlet Aperture 625. Funnel 600 has a funnel inlet aperture 610 complementary to cavity outlet aperture 404 , and a funnel face 610 that forms the portion of channel face 310 from cavity face 410 to outlet 230 .

In this embodiment, the funnel face 610 is substantially symmetrical about the axis of symmetry 1200 . The axis of symmetry 1200 is substantially aligned with the axis of rotation 1060 during intended operation of the wind turbine.

The funnel face 610 has at least one main funnel radius 640 around which the funnel face 610 is penetrated at least once to the funnel drain 630 . FIG. 2 shows the water flow line 122 directing water to the funnel drain 630 .

FIG. 4 shows optional details of the transition from cavity 400 towards interior 1110 to cavity outlet aperture 404 . In this embodiment, a drop catcher 470 is also shown, here having an L-shape with one leg attached outside the cavity 400, and Another leg extending into cavity 400 for catching water droplets.

FIG. 5 shows details of the connection of the funnel 600 visible in the transition between the cavity 400 and the funnel 600 in the lower part of FIG. 3 . Structural parts such as spinners form cavity face 410 and are curved and extend upstream and form part of funnel face 610A. The funnel 600 is also formed by a structure that forms a funnel face 610 that slopes downward towards the funnel connection 670 where the funnel drain 630 is shaped as the main body of the actual spinner 200 and the funnel 600. gaps between structural parts.

FIG. 6 shows an embodiment of a cavity drain 450 that penetrates the cavity face 410 . In this embodiment, the penetration is at approximately the maximum width. A number of cavity drains 450 are shown in this embodiment. The drain is shaped to direct the separated water away from the cavity 400 (not shown), where the cavity drain is shaped to direct the water to the outside of the spinner face. Alternatively, drains may be connected to a common drain to direct water away.

FIG. 7 shows an embodiment of a cavity drain 450 that penetrates the cavity face 410 . In this embodiment, the penetrations are at approximately the maximum width and are shaped as a helix 460 that spirals toward the inlet 220 . The helical travel of the screw 460 forms the thread according to the intended direction of rotation of the rotor 1030 .

Figure 8 shows an alternative embodiment of a capture body 500 having a capture body face 510 having a capture body void 530 that connects the capture body front face 512 to the capture body The back 514 is spaced. The capture body void 530 is shown here as being formed by the capture body front face 512 , which has a smaller stretch or radius than the capture body back face 514 . Furthermore, the capture body front face 512 extends into the capture body back face 514 , thereby being arranged to capture water into the capture body 500 . Drainage holes in the capture body can be provided as desired.

Claims (14)

1. A water and gas separation system (100) for a wind turbine (1000), the wind turbine (1000) having a wind turbine hub (1040) supporting blades (1050), the blades (1050) being arranged to rotate about a rotational axis (1060) supported by a nacelle (1020), the wind turbine hub (1040) being protected by a spinner (200), the spinner (200) isolating an outer portion (1100) from an inner portion (1110) and being arranged to rotate with the wind turbine hub (1040); the water gas separation system (100) is configured to:

-a spinner (200), the spinner (200) having a spinner front face (210), the spinner front face (210) being arranged on the outside to face away from the nacelle (1020) in a yaw direction (1070) during intended operation, the spinner front face (210) having an inlet (220), the inlet (220) connecting the exterior (1100) with the interior (1110) through a passage (300);

-a channel (300), said channel (300) having a channel face (310) connecting an inlet (222) with an outlet (230) in an interior (1110), and the system having:

-a cavity (400), said cavity (400) having a cavity surface (410), said cavity surface (410) being penetrated at least once to a cavity drainage means (450), and said cavity (400) partially surrounding a trap (500);

-a catch body (500), the catch body (500) having a catch body face (510), the catch body face (510) having a catch body front face (512) facing the inlet (220) and having a catch body rear face (514) extending away from the front face (512) and facing the outlet (230); the capture body (500) substantially defines a volume and is suspended in the cavity (400).

2. The water gas separation system (100) according to claim 1, wherein the passage face (310) is substantially symmetrical with respect to an axis of symmetry (1200), said axis of symmetry (1200) being substantially aligned with the axis of rotation (1060) during intended operation.

3. The water gas separation system (100) according to one or more of the preceding claims, wherein the trap body face (510) is substantially symmetrical with respect to an axis of symmetry (1200), said axis of symmetry (1200) being substantially aligned with the axis of rotation (1060) during expected operation.

4. The water gas separation system (100) according to any one or more of the preceding claims, wherein the trap body (500) has a trap body front face (512), said trap body front face (512) being arranged to cover more extension than the inlet aperture (222).

5. The water gas separation system (100) according to any one or more of the preceding claims, wherein the trap (500) has a trap back face (514), said trap back face (514) being shaped with a curvature that is more curved compared to the curvature of the trap front face (512).

6. The water gas separation system (100) according to any one or more of the preceding claims, wherein the trap (500) is arranged in the cavity (400) and its cavity surface (410) and trap surface (510) are shaped such that the channel (300) converges from the inlet (220) towards a minimum channel width and from there diverges the channel (300) towards the outlet (230).

7. The water gas separation system (100) according to one or more of the preceding claims, wherein the channel (300) has an inlet central flow line (320) centered between the cavity face (410) and the capturing body face (510), and an outlet central flow line (330) centered between the cavity face (410) and the capturing body face (510), the cavity face (410) and the capturing body face (510) being shaped and arranged such that the inlet central flow line (320) and the outlet central flow line (330) are turned by a turn (350), said turn (350) being at least 70 degrees.

8. The water gas separation system (100) according to any one or more of the preceding claims, wherein the spinner front face (210) is substantially symmetrical about an axis of symmetry (1200) and has a forwardmost stagnation point (250) in radial cross-section and, from said stagnation point (250) towards the cavity (400), an aerodynamically shaped inlet face (260).

9. The water gas separation system (100) according to any one or more of the preceding claims, wherein the cavity drain (450) penetrates the cavity face (410) at about the maximum width and is shaped as a spiral (460), said spiral (460) spiraling towards the spinner inlet (220) penetrating the spinner front face (210), the spiraling of the spiral (460) being threaded according to the intended direction of rotation of the rotor (1030).

10. The water gas separation system (100) according to any one or more of claims 1-8, wherein the cavity drain (450) penetrates the cavity face (410) at about the maximum width and is shaped as a spiral (460), said spiral (460) spiraling towards the outlet (230) and penetrating the spinner front face (210), the spiraling of the spiral (460) being threaded in a direction opposite to the intended direction of rotation of the rotor (1030).

11. The water gas separation system (100) according to any one or more of the preceding claims, further comprising a funnel (600) arranged between the cavity (400) and the outlet (230), said funnel (600) having a funnel inlet aperture (610) complementary to the cavity outlet aperture (404), and a funnel face (610), said funnel face (610) forming part of the passage face (310) from the cavity face (410) to the outlet (230).

12. The water gas separation system (100) according to claim 11, wherein the funnel face (610) is substantially symmetrical with respect to an axis of symmetry (1200), said axis of symmetry (1200) being substantially aligned with the axis of rotation (1060) during intended operation.

13. The water gas separation system (100) according to claim 11 or 12, wherein the funnel face (610) has at least one main funnel radius (640), around which radius (640) the funnel face (610) is penetrated at least once to the funnel drain (630).

14. A method of ventilating an interior (1110) of a wind turbine (1000), the method comprising the act of using the water gas separation system (100) according to any one of claims 1 to 13.

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