DK201800097U3 - WINDMILL DEHUMP INCLUDING A SECONDARY POWER SOURCE - Google Patents

Abstract

Herein is described a dehumidifier unit (2) for an offshore wind turbine comprising a removable wind generator (1) and a dehumidifier (3), operatively connected (5.51) for power transmission from the wind generator (1) to the dehumidifier (3) so that during operation of the wind generator ( 1) operates the dehumidifier (3); characterized in that the wind generator (1) generates less than 5 kW at 4 m / s wind speed.

Description

SECONDARY POWER SOURCE FOR WINDMILL DEHUMP

TECHNICAL FIELD

Within the field of offshore wind turbine dehumidifiers, as secondary power sources for a wind turbine dehumidifier, at least one wind rose or a mini-wind turbine is additionally mounted on the foundation, tower or nacelle of the offshore wind turbine.

BACKGROUND

Modern power generating wind turbines have achieved a unique position in Denmark in the attempt to reduce the nation's CO2 footprint and to mitigate climate change. Denmark is particularly suited to reap the benefits of a comprehensive renewable energy investment from wind turbines due to the geographical location where frequent wind-bearing low pressures pass over sea and land. In particular, the shallow seabed within Denmark's offshore territory has created a significant investment in the development of offshore wind turbines.

However, special offshore wind turbines place special and increased requirements for dehumidification and possibly desalination of the indoor air in the foundation, tower and nacelle of the offshore wind turbine to avoid corrosion, condensation and mold formation. This dehumidification process contributes to the wind turbine's operating energy consumption, which operating energy consumption of modern wind turbines, and especially offshore wind turbines, can be quite considerable, an energy consumption that must be maintained even at the production shutdown of the wind turbine to avoid consequential damage to the wind turbine electronics. installed in the wind turbine's foundation, tower and / or nacelle.

A particular problem with the shutdown and discontinuation of the electricity supply for the operation of offshore wind turbines is the very rapid molding that takes place in the interior of offshore wind turbines due to the high humidity in the sea air which requires continuous dehumidification. In particular, the cost of cleaning the inside of the offshore wind turbine for mold is high, but necessary, to secure the mill and operating personnel against mold. Therefore, solutions are now needed to solve the problem of secondary power sources for wind turbines, and especially offshore wind turbines, which can ensure operational flow even when the wind turbine experiences a downtime.

A further, but very significant, problem arises in the very design phase of the offshore wind turbine, where no operational flow has yet been established. Here, even very modest delays in the establishment of operating current will also result in the emergence of mold in the interior of the offshore wind turbine, just as salt-induced corrosion cannot be slowed or reduced.

Therefore, in both situations, secondary power supplies are needed to secure operating power to the wind turbines during downtime and shutdowns, which will typically be short-term batteries, and onshore or offshore power generators for extended consumption. However, during the design phase of the offshore wind turbines, it is not possible to use onshore power to operate equipment in the offshore wind turbine, and it is therefore necessary to use offshore power generators, typically diesel generators, which are costly and rapidly depleted due to the extreme operating environment.

Therefore, to address some of the challenges posed by the lack of operating current during operation and construction of offshore wind turbines, the Generators propose the present dehumidifier comprising at least one smaller secondary wind turbine mounted on either foundation, tower and / or nacelle as herein described, producing a dehumidifier for a wind turbine comprising an internal power source, characterized in that the internal power source is a wind turbine mounted on the outside of an offshore wind turbine with a production capacity of less than 5 kW at 4 m / s wind power.

It has long been known to mount small, secondary wind turbines, so-called wind roses (see Figure 1), or bow catches, on a tower or nacelle of a primary wind turbine, thereby obtaining access to utilize a smaller, but more flexible, source to transform the wind energy for mechanical energy, such as that shown in Figure 1 (1), patented in England in 1745 by Edmund Lee. Figure 1 depicts such a self-tapping Dutch wind turbine comprising a wind rose (1) on the hat / nacelle, which winds up an automatic turning plant which, unlike a tail to be operated manually from the ground, ensures that the hat is always rotating according to the wind direction , so the mill is curled up in the wind. The wind rose is mounted on two rose bushes opposite the wing side. When the wind strikes the wind rose from the side, it turns around, thereby triggering small cogs and shafts associated with a tooth ring on the mill, thereby turning the entire mill cap. When the wind rose shelters and stops, the windmill is curled up in the wind.

The generation takes advantage of the advantageous situation that during the lack of operating flow for a production wind turbine, small domestic wind turbines can still produce enough electricity to ensure the operation of, for example, the necessary dehumidification of the interior of the production wind turbine, ie. foundation, tower and nacelle. The particular advantage of utilizing weak winds to produce operating current rather than solar cells is partly independence from sunshine, which can reduce the need for backup batteries, but also due to reduced maintenance, which is particularly significant for offshore solar cells due to salt pollution of the solar surface and due to. due to the risk of solar cells blowing in severe weather due to their large surface area.

SUMMARY OF PRODUCTION

According to the invention, a dehumidifier unit (2) for an offshore wind turbine comprising a removable wind generator (1) and a dehumidifier (3), operatively connected (5.51) for power transmission from the wind generator (1) to the dehumidifier (3) is described thus. during operation of the wind generator (1), the dehumidifier (3) is operated; characterized in that the wind generator (1) generates less than 5 kW at 4 m / s wind speed.

In one embodiment, a dehumidifier unit (2) for an offshore wind turbine according to the invention is disclosed comprising a removable wind generator (1) and a dehumidifier (3), wherein the dehumidifier (3) is a drying wheel dehumidifier comprising a drying wheel (31).

In one embodiment, a dehumidifier unit (2) is described for an offshore wind turbine according to the invention comprising a removable wind generator (1) and a dehumidifier (3), wherein the dehumidifier (3) is a drying wheel dehumidifier comprising a drying wheel (31), which dehumidifier (3) further comprises a burner unit whereby heated regeneration air for regenerating the drying wheel (31) is obtained by combustion of a fuel, preferably oil.

In one embodiment, a dehumidifier unit (2) for an offshore wind turbine according to the invention is disclosed comprising a removable wind generator (1) and a dehumidifier (3), further comprising a backup power supply (4) comprising at least one backup battery (41) and an inverter (42). ; wherein the wind generator (1) is operatively connected (5,51,52) to the dehumidifier (3) and the backup power supply (4) for power transmission from the wind generator (1) and the backup power supply (4) is operatively connected (53) to the dehumidifier (3) to current transmission from the backup power supply such that during operation of the wind generator (1), the dehumidifier (3) and the backup power supply (4) are charged, and when the wind generator (1) is not powered, the dehumidifier is powered by the backup power supply (4), characterized in that the wind generator (1) ) generates less than 5 kW at 4 m / s wind speed.

In one embodiment, a dehumidifier unit (2) for an offshore wind turbine according to the invention is disclosed comprising a removable wind generator (1) and a dehumidifier (3), wherein the dehumidifier (3) and the backup power supply (4) are assembled into a removable dehumidifier unit (6). ).

In one embodiment, a dehumidifier unit (2) for an offshore wind turbine according to the invention is disclosed comprising a removable wind generator (1) and a dehumidifier (3), wherein the removable wind generator (1) generates less than 3 kW at 4 m / s wind speed.

In one embodiment, offshore wind turbine according to removable wind generator (1) and movable wind generator (1) (91.92) is disclosed for attachment to a dehumidifier unit (2) for the production comprising a dehumidifier (3), comprising fasteners an outer surface of the wind turbine foundation (8) or tower (9), or a support (92).

preferably fittings (91)

In one embodiment, a dehumidifier unit (2) for an offshore wind turbine according to the invention is disclosed comprising a removable wind generator (1) and a dehumidifier (3), wherein the removable wind generator (1) comprises means for folding up and down (101) of the movable wind generator (1).

In one embodiment, a dehumidifier unit (2) for an offshore wind turbine according to the invention is disclosed comprising a removable wind generator (1) and a dehumidifier (3), wherein said means for up and down (101) of the removable wind generator (1) is operative. connected to power transmission with a covered reserve power supply (4), whereby said means can be actuated for up and down the movable wind generator (1) without external power supply.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1: Dutch wind turbine with wind rose and pitcher.

Figure 2: Dehumidification after generation.

Character

3:

Mounted dehumidifier after generation.

Character

Mounting of removable wind generator on foundation.

Character

5:

Installation of removable wind generator pa

Character

6:

Installation of removable wind generator pa

DETAILED DESCRIPTION OF THE MOVEMENT

According to the invention, there is disclosed herein a dehumidifier unit (2) for a wind turbine comprising a removable wind generator (1) and a dehumidifier (3) operatively connected (5.51) for power transmission from the wind generator (1) to the dehumidifier (3). during operation of the wind generator (1), the dehumidifier (3) is operated; characterized in that the wind generator (1) generates less than 5 kW at 4 m / s wind speed. It is preferred that the dehumidifier (3) is a drying wheel dehumidifier comprising a drying wheel (31).

The conditions at sea, both during the construction of offshore wind turbines and during downtime, make it extremely problematic to establish emergency power to avoid moisture-induced damage. The present generation solves this problem by connecting a wind generator and a dehumidifier to a removable unit, so that power can be quickly established to the dehumidifier locally and without dependence on the establishment of operating current from central power generators or land-based operating current.

In one embodiment of the generation, the dehumidifier (3) further comprises a secondary connection to operating current and a switching relay arranged to allow switching between operating current and current transmission from the wind generator (1) in the event of a failure of the operating current.

It is intended that the removable wind generator (1) should generate less current than 5 kW at 4 m / s wind speed. A useful wind generator that meets such conditions could be, for example, SD3 or SD3EX from SD Windpower (https://sdwindenergy.com/smal 1-wind-turblnes / sd3 ~ 3kw ~ wind-turbine /).

This maximum limit is chosen because most production wind turbines are not operational at wind speeds lower than 4 m / s, so the removable wind generator (1) must be operable when the production wind turbine on which it is mounted goes into service stoppage due to lack of wind.

In preferred embodiments, the removable wind generator (1) provides 3 kW at 4 m / s wind speed, preferably 1 kW at 4 m / s wind speed. Also smaller wind generators can be used, but then it is advantageous to operationally connect more than one wind generator (1) to the dehumidifier (3). The movable wind generator (1) shown in the figures is representative and other types of wind generators other than 3-blade rotor with horizontal rotor shaft can also be used. In certain embodiments, movable wind generators with vertical rotor shafts may be advantageous.

In a particular embodiment of the dehumidifier (3) comprising a drying wheel dehumidifier comprising a drying wheel (31), the dehumidifier further comprises a burner unit, whereby heated regeneration air for regenerating the drying wheel (31) is obtained by combustion of fuel, preferably oil. This reduces the operating current requirement for the dehumidifier (3) from approx. 1 kW for dehumidifying an offshore wind turbine to between 150-200 W, which can be achieved with a portable wind generator.

Figure 2 shows the dehumidifier unit (2) according to the production in its most general embodiment. It is particularly preferred that the wind turbine in which the dehumidifier is to be installed according to the generation is an offshore wind turbine.

According to an embodiment of the generation as described above, a dehumidifier unit (2) for a wind turbine comprising a removable wind generator (1) and a dehumidifier (3) as well as an additional power supply (4) comprising at least one spare battery (41) are described. ); wherein the wind generator (1) is operatively connected (5.51.52) to the dehumidifier (3) and the reserve power supply (4) for power transmission from the wind generator (1) and the reserve power supply (4) is operatively connected (53) to the dehumidifier (3) for power transmission from the backup power supply such that during operation of the wind generator (1), the dehumidifier (3) and the backup power supply (4) are charged, and when the wind generator (1) is not powered, the dehumidifier is powered by the backup power supply (4), characterized in that the wind generator (1) generates less than 5 kW at 4 m / s wind speed. In some embodiments, the backup power supply further comprises an inverter (42).

It is preferred that the dehumidifier (3) and, if included, the backup power supply (4) be assembled into a removable dehumidifier unit (6) so that the wind generator (1) and the

removable dehumidifier unit (6) able to placed independently of each other in relation to one wind turbine , especially one offshore wind turbine, interior and exterior as defined at the wind turbine

wall (7) (cf. Figure 3).

However, there are a number of safety aspects that require consideration of the location of the removable wind generator, and it must be ensured that employees at the wind turbine cannot be harmed because of the removable wind generator. One of the challenges is to be able to access offshore wind turbines and their operating platform by boat from several sides, depending on the wind direction. Therefore, if the removable wind generator is temporarily mounted on the operating platform, which is the easiest, cf. below, it may be advantageous with the above burner solution and one or more small wind turbine-type wind generators. Alternatively, the removable wind generator (1) should be mounted at an appropriate height on the tower of the offshore wind turbine or on the nacelle so that the removable wind generator (1) does not pose a danger to the operating personnel. A further problem with the installation of the removable wind generator (1) is due to turbine formation around the tower and nacelle. Depending on the direction of the wind, there is a risk of turbulence whereby the offshore wind turbine tower could affect the wind movement to the detriment of the mobile wind generator's electricity generation and durability.

The examples of Figures 4 and 5 are shown to illustrate how the removable wind generator (1) can be mounted on either the foundation (8) or platform (81) of the offshore wind turbine (Figure 4), or on the offshore wind turbine (Figure 5) tower (9).

For the smallest of the intended removable wind generators (1), IkW or less, it is simple to mount the wind generator on the work platform (81) on the foundation (8) which provides access to the interior of the tower (9) and docking facilities for supply and crew ships. Possible mounting points are indicated by arrow (M), both directly on the work platform itself (81) but also on the railing of the platform (82). The latter is best suited for the smallest wind turbines that only need to remain mounted for a short time, while mounting directly on the platform (81) is more stable and can handle larger wind generators (1) and stronger winds.

For the larger wind generators, it is desirable to place them away from the work areas near the sea surface, and mounting of the wind generator (1) should thus be done either on the tower (9) by welding directly on the tower, bolt-on bolts, or by brackets (91) (Figure 5) . The advantage of bracket belts (91) is that the wind generator (1) can be moved more easily along the belt if it turns out that the wind conditions and turbulence around the turbine tower make an initial mounting location inappropriate. Alternatively, one may choose to use a support (92) for the wind generator (1) which can be attached to tower (8) or foundation (8) and create a longer distance between wind generator and wind turbine, thereby less turbulence.

Thus, in one embodiment of the dehumidifier (2) according to the invention, the removable wind generator (1) comprises fasteners (91.92) for attachment to an exterior of the foundation (8) or tower (9) of the wind turbine, preferably bracket (91) or a support (92).

However, it is particularly preferred to mount the removable wind generator (1) on the offshore wind turbine's nacelle (10), especially on the nacelle's working platform, when this has become possible (Figure 6). When mounting on the nacelle (10), both the safety of the operating crew is avoided, as well as the turbulence and wind shade created by the tower of the offshore wind turbine (9).

In a particularly preferred embodiment (Figure 6B) of the dehumidifier (2) according to the invention, the removable wind generator (1) comprises means for folding and folding (101) of the removable wind generator (1). In this way, the wind generator (1) can be sheltered in harsh weather conditions when desired, and put into a folded production position when the dehumidifier (2) has to use electricity from the wind generator (1). For the collapsible and removable wind generator (1), it may be advantageous to use a vertical wind generator (1) with a vertical rotor shaft, thereby reducing the space requirement of the nacelle's working platform in the folded-down state. Alternatively, and also preferably, a 3-blade rotor with horizontal shaft and collapsible wings can be used.

In one embodiment, it is contemplated that said means for up-down (101) of the removable wind generator (1) are operatively connected for power transmission with the reserve power supply (4) when it is included in the generation, whereby said means can be activated for up-down of the removable wind generator (1), including, for example, when the production turbine is shut down due to wind speeds below the production turbine's minimum operating wind power.

Claims (9)

A dehumidifier unit (2) for an offshore wind turbine comprising a removable wind generator (1) and a dehumidifier (3), operatively connected (5.51) for power transmission from the wind generator (1) to the dehumidifier (3) such that during operation of the wind generator ( 1) operates the dehumidifier (3); characterized in that the wind generator (1) generates less than 5 kW at 4 m / s wind speed. A dehumidifier unit (2) for an offshore wind turbine according to claim 1 comprising a removable wind generator (1) and a dehumidifier (3), wherein the dehumidifier (3) is a drying wheel dehumidifier comprising a drying wheel (31). A dehumidifier unit (2) for an offshore wind turbine according to claim 2 comprising a removable wind generator (1) and a dehumidifier (3), wherein the dehumidifier (3) is a drying wheel dehumidifier comprising a drying wheel (31), further dehumidifying (3) comprises a burner unit whereby heated regeneration air for regenerating the drying wheel (31) is obtained by combustion of a fuel, preferably oil. A dehumidifier unit (2) for an offshore wind turbine according to one of claims 1 to 3 comprising a removable wind generator (1) and a dehumidifier (3), further comprising a backup power supply (4) comprising at least one spare battery (41); wherein the wind generator (1) is operatively connected (5,51,52) to the dehumidifier (3) and the backup power supply (4) for power transmission from the wind generator (1) and the backup power supply (4) is operatively connected (53) to the dehumidifier (3) to current transmission from the backup power supply such that during operation of the wind generator (1), the dehumidifier (3) and the backup power supply (4) are charged, and when the wind generator (1) is not powered, the dehumidifier is powered by the backup power supply (4), characterized in that the wind generator (1) ) generates less than 5 kW at 4 m / s wind speed. The dehumidifier unit (2) for an offshore wind turbine according to claim 4 comprising a removable wind generator (1) and a dehumidifier (3), wherein the dehumidifier (3) and the backup power supply (4) are assembled into a removable dehumidifier unit (6). A dehumidifier unit (2) for an offshore wind turbine according to one of claims 1 to 5 comprising a removable wind generator (1) and a dehumidifier (3), wherein the removable wind generator (1) generates less than 3 kW at 4 m / s wind speed . A dehumidifier unit (2) for an offshore wind turbine according to one of claims 1 to 6 comprising a removable wind generator (1) and a dehumidifier (3), wherein the removable wind generator (1) comprises fastening means (91.92) for attachment to a wind turbine. exterior of the wind turbine foundation (8) or tower (9), preferably bracket belt (91) or a support (92). A dehumidifier unit (2) for an offshore wind turbine according to one of claims 1 to 7 comprising a removable wind generator (1) and a dehumidifier (3), wherein the removable wind generator (1) comprises means for folding up and down (101) by the removable wind generator (1). 9. Dehumidifier unit (2) for an offshore wind turbine according to claim 8 comprising a removable wind generator (1) and a dehumidifier (3), wherein said means for folding up and down (101) of the removable wind generator (1) are operatively connected to 5 power transmission with a covered reserve power supply (4), whereby said means can be actuated for up and down of the removable wind generator (1) without external power supply.