BE1024656B9 - Wind turbine device - Google Patents

Abstract

The present invention relates to a device for orienting an air flow towards a wind turbine arranged to be arranged in front of a building corner, comprising an aerodynamic fairing which can be fixed with respect to said corner and having a a distal face and a proximal face, which is arranged to face said corner and form a passage therewith, said proximal face having a first portion forming a first flow section for deflecting said air flow towards said wind turbine, a second portion forming a second flow section and a third portion forming a third flow section arranged to deflect said air flow out of said device, characterized in that said second portion is curved and extends, opposite said distal face, and in that said second flow section is narrower than said first flow section; coulement.

Description

(30) Priority data:

(73) Holder (s):

CERDECAM ASBL 1200, BRUXELLES Belgium (72) Inventor (s):

JANSSENS Kevin

1370 SAINT-JEAN-GEEST

Belgium (54) Wind turbine device (57) The present invention relates to a device for directing an air flow towards a wind turbine arranged to be arranged in front of a corner of a building, comprising an aerodynamic fairing capable of '' being fixed relative to said corner and having a distal face and a proximal face, which is arranged to face said corner and form with it a passage, said proximal face having a first part forming a first flow section intended to deflect said air flow towards said wind turbine, a second part forming a second flow section and a third part forming a third flow section arranged to deflect said air flow outside said device, characterized in that said second part is curved and extends, opposite said distal face, and in that said second flow section is pl us narrower than said first flow section.

BELGIAN INVENTION PATENT

FPS Economy, SMEs, Middle Classes & Energy

Publication number: 1024656 Deposit number: BE2017 / 5153

Intellectual Property Office

International Classification: F03D 9/45 F03D 3/04 Date of issue: 17/05/2018

The Minister of the Economy,

Having regard to the Paris Convention of March 20, 1883 for the Protection of Industrial Property;

Considering the law of March 28, 1984 on patents for invention, article 22, for patent applications introduced before September 22, 2014;

Given Title 1 “Patents for invention” of Book XI of the Code of Economic Law, article XI.24, for patent applications introduced from September 22, 2014;

Having regard to the Royal Decree of 2 December 1986 relating to the request, the issue and the maintenance in force of invention patents, article 28;

Considering the patent application received by the Intellectual Property Office on 03/10/2017.

Whereas for patent applications falling within the scope of Title 1, Book XI of the Code of Economic Law (hereinafter CDE), in accordance with article XI. 19, §4, paragraph 2, of the CDE, if the patent application has been the subject of a search report mentioning a lack of unity of invention within the meaning of the §ler of article XI.19 cited above and in the event that the applicant does not limit or file a divisional application in accordance with the results of the search report, the granted patent will be limited to the claims for which the search report has been drawn up.

Stopped :

First article. - It is issued to

CERDECAM ASBL, Promenade de l'Alma 50, 1200 BRUXELLES Belgium;

represented by a Belgian invention patent with a duration of 20 years, subject to payment of the annual fees referred to in article XI.48, §1 of the Code of Economic Law, for: Device for wind turbines.

INVENTOR (S):

JANSSENS Kevin, Rue Saint-Georges 14, 1370, SAINT-JEAN-GEEST;

PRIORITY (S):

DIVISION:

divided from the basic application: filing date of the basic application:

Article 2. - This patent is granted without prior examination of the patentability of the invention, without guarantee of the merit of the invention or of the accuracy of the description thereof and at the risk and peril of the applicant (s) ( s).

Brussels, 05/17/2018, By special delegation:

BE2017 / 5153 “DEVICE FOR ¹ 'WIND TURBINE

The present invention relates to a device for directing an air flow towards a wind turbine, arranged to be arranged in front of a corner of a building, comprising an aerodynamic fairing capable of being fixed relative to said corner of said building and having a distal face and a proximal face, which is arranged to face said corner of said building and form with it a flow passage, said proximal face having a first air inlet part forming a first flow section of said passage intended to divert said air flow towards said wind turbine, a second housing part of said wind turbine forming a second flow section of said passage and a third air outlet part forming a third flow section of said passage arranged to deflect said air flow outside said device.

Currently, there are few projects aimed at enhancing wind turbines in the city. This is in particular due to regulations, which are particularly strict, when it comes to implementing this type of installation in an urban environment. In fact, the limitations linked in particular to noise, the strobe effect and the lack of aesthetics of current wind turbines do not allow this type of ecological project to be favored. For this reason, it is common for these wind projects to take shape in the countryside, or the regulations in force constitute a less restrictive brake on the creation of renewable energy.

In addition, the countryside landscape is also more favorable for the placement of wind turbines because the air flow speed is more favorable. This is explained by the fact that the surface of the earth has little, if any, effect on the speed of the air flow, when the wind turbine is placed at a high distance (for example, 100 m) from the ground. Conversely, a wind turbine close to the ground can hardly be supplied with air flow since the latter will have a speed close to zero because of the roughness of the soil, which offers resistance to flow

BE2017 / 5153 air. For these reasons, your current wind turbines in the countryside are traditionally placed on relatively high masts to take advantage of the favorable speed of the air flow. These wind turbines, commonly called "multi-megawaft", are interesting for the recovery of wind energy but generate, in return, colossal structural challenges, both in the sizing of the mast and in that of the foundation.

In urban areas, the speed of air flow is not necessarily as advantageous as that in the countryside. However, the Venturi effect existing in the vicinity of the corners of buildings makes it possible to have an exploitable concentration of air flow. This air flow thus constitutes a potential means for generating renewable energy, but turns out to be a challenge in view of the points mentioned above,

More specifically, when the air flow meets a building, it can typically either abut against and generate turbulence, or bypass it, which creates a Venturi effect at the exposed corners of the building. This Venturi effect thus tends to create a significant concentration of energy on the corners of buildings that can potentially be exploited by a wind turbine.

It is in this context that devices designed to direct an air flow towards a wind turbine have been developed. Such a device generally comprises an aerodynamic fairing which can be fixed relative to said corner of said building and which is arranged opposite the wind turbine to supply the latter with air flow.

With such a system, the air flow is oriented by means of the aerodynamic fairing in the direction of the wind turbine to supply it with air flow in order to recover the energy created, which can then be used to produce l 'electricity.

Document US 2012/0080884 Ä1 discloses a device comprising a fairing, which is intended to direct an air flow towards a wind turbine, which is arranged opposite a corner of

BE2017 / 5153 building. Several embodiments are described which each have their limitations.

According to an exemplary embodiment, an air flow orientation device has an air inlet which forms a first passage which narrows over a length L in order to form a narrower passage. This narrower passage is located adjacent to the area where the wind turbine is located. Thus, the air flow is compressed when it enters the device and then turns the blades of the wind turbine. The fairing has a symmetrical structure.

Unfortunately, the energy performance of such a faired wind turbine leaves something to be desired since it is limited by the lack of efficiency of the fairing which does not optimally deflect the air flow towards the wind turbine.

Document US 2012/0080884 A1 also proposes a device which is only intended for new constructions. According to this option, it is essential to integrate the fairing into the structure of the building by adapting the shape of the corner of the building.

This document also teaches a device whose fairing is movable relative to the corner of the building so as to adapt the size of air inlet and air outlet. Such a configuration necessarily involves the use of a computer system to automate the adjustment of the angle formed by the displacement of the fairing relative to the corner of the building.

Such a system is therefore complex to implement for integration projects of streamlined wind turbines in an urban environment. In addition, the reliability of such a system leaves something to be desired as well as the robustness of the device which is presented in two parts.

In short, there is a need to provide a device capable of directing the air flow towards a wind turbine which is simpler, efficient, practical and economical, while guaranteeing a

BE2017 / 5153 optimal use of air flow to sufficiently supply air to a wind turbine.

In fact, the higher the wind speed, the greater the energy transferred to the wind turbine.

The purpose of the invention is to overcome the drawbacks of the state of the art by providing a device which makes it possible to increase the speed of air flow, when the latter enters the device for efficiently supplying a wind turbine. Thus, the wind turbine will be efficient in that it will produce electricity continuously.

To resolve the aforementioned drawbacks, provision is made according to the present invention for a device as indicated at the start, characterized in that said second part is curved and extends, opposite to said distal face of said fairing, and in that that said second flow section of said passage is narrower than said first flow section of said passage.

The device according to the invention makes it possible to considerably increase the speed of flow of air or wind, which makes it possible to efficiently power a wind turbine. Indeed, it has been found that the device according to the invention makes it possible to amplify the wind power up to more than 500% and to recover about 20% thereof with a view to a possible energy transformation. In other words, for a given surface, the device according to the invention is capable of recovering more than 100% of the power initially present in the air flow, which is particularly advantageous.

This is in particular due to the particular shape of the aerodynamic fairing, the second part of which is curved and extends away from the distal face of the fairing. Thus, when the air flow enters the device according to the invention, it strikes this second curved part resulting in an acceleration of the air flow in the second passage flow section, according to the principle a "ventun nozzle". This is therefore favorable, when the device supplies

BE2017 / 5153 a wind turbine arranged in front of a corner of a building, preferably in an urban environment. In this case, the air flow enters the first flow section and is diverted to the second flow section, where the wind turbine is located. This is where the air flow is accelerated and optimized because it then abuts the second curved part of the fairing. The second flow section being narrower than the inlet flow section has the effect of amplifying the Venturi effect within the device, which makes it possible to efficiently concentrate the energy towards the wind generator. the wind turbine can be optimized.

In addition, the device according to the invention is effective in this formation of vortices or stalling within the reduced, which avoids disturbing the air flow and promotes the concentration of air flow in an area. given, in particular the area located at the second air flow section, where the second curved part of the aerodynamic fairing is located.

The phenomenon of vortices can take place, when the speed of the air flow in the vicinity of the corner of the building has an inversion of direction, which leads to what is called “a separation of the boundary layer” because of loss of grip on part of the device and / or on the corner of the building. Such a phenomenon is avoided thanks to the device according to the invention, in particular at the level of the second housing part of the wind turbine.

The device according to the invention has the advantage of being robust and economical in that it requires few elements to manufacture it. When the device according to the invention is used in front of a slow wedge to supply a wind turbine with air flow, this is more practical, since it does not require any modification of a corner of a building to function effectively. .

Another advantage is that the device according to the present invention is relatively easy to build and to arrange in view of the small quantity

BE2017 / 5153 of elements that compose you, which therefore allows to produce electricity at lower cost.

An additional advantage of the present invention is that the fairing can be mobile and be arranged as a function of the orientation and / or the intensity of the wind, which makes it possible to best concentrate the wind energy and therefore to improve the production of electricity by the wind turbine present within the device.

In addition, the aerodynamic fairing according to the present invention also makes it possible to protect the wind turbine against vandalism, degradation due to external factors, such as exposure to the sun and the intrusion of projectiles.

The town planning rules being often restrictive concerning the installation of devices according to the invention in an urban environment, the fairing can serve as a decorative or advertising element, which would make its integration, in terms of town planning, easier and advantageous.

In a particular embodiment, said second part has a radius of curvature between 0.2 and 1 m, preferably between 0.2 and 0.9 m, more preferably between 0.5 and 0.8 m. In this way, the listening of air within the device can be particularly accelerated, especially at the level of said second housing part of said eohenne. This therefore allows the wind turbine to recover more energy at a specific location on the device.

In a particular embodiment, said aerodynamic fairing has in cross section at least one point of inflection, preferably at least two points of inflection, in order to further increase the speed of air flow in said second part of housing of said wind turbine.

Preferably, said first part is curved and extends opposite to said second curved part so as to form in cross section at least one point of inflection. In this way, the shape of said first part makes it possible to provide, in cross section, a point

BE2017 / 5153 inflection which allows the air flow to be accelerated more optimally when the air flow flows from said first flow section from said passage to said second passage flow section.

Advantageously also, said first curved part has a radius of curvature between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m. In this way, the selection of a radius of curvature makes it possible to optimize the air flow within the device which can be particularly accelerated, especially at the level of said second flow section where the wind turbine is located. therefore allows the wind turbine to recover more energy.

In a particular embodiment, said third part is curved and extends opposite to said second curved part so as to form, in cross section, at least one inflection point. This inflection point optimally evacuates the air flow outside the device.

Advantageously also, said third curved part has a radius of curvature between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m. Selecting a radius of curvature further optimizes the speed of air flow out of the device.

In addition, in a particular embodiment, the device further comprises at least one curved deflector located opposite said proximal face of said aerodynamic fairing and being arranged to be disposed adjacent to said corner of said building. Thus, the air flow can be maintained more intensely in said second passage flow section. In addition, this makes it possible to increase the vacuum zone and the suction phenomenon in the device according to the invention. which is favorable for significantly increasing the efficiency of the device in order to supply the wind turbine with sufficient air flow,

BE2017 / 5153

In a particular embodiment, said at least one curved deflector extends in the direction of said proximal face of said aerodynamic fairing. This has the effect of reducing said second flow section, which increases the power of the wind at said second section and therefore improves the recovery of electricity by a wind turbine located at this location.

Advantageously, said had at least one deflector has a radius of curvature between 0.1 and 2 m, preferably between 0.2 and 1 m, more preferably between 0.2 and 0.7 m. A selection of the radius of curvature makes it possible to further accentuate the aforementioned effect at the entry of the device according to the invention when the air flow enters the first part to be effectively diverted towards the second part which has the second section. of flow.

In addition, in a particular embodiment of the device according to the invention, the latter comprises at least two deflectors of curved shape arranged opposite said proximal face of said aerodynamic fairing and arranged to be located adjacent to said corner of said building. Thus, when the device is located in front of a wind turbine, said at least two deflectors are located on either side of the corner of the building. This has in particular the effect of preventing the separation of the boundary layer and thus increasing the pressure difference between the first flow section and the third flow section, which makes it possible to improve the air flow speed. within the system. Consequently, the wind turbine located within the device can recover more energy.

In a particular embodiment of the device, a first curved shape deflector extends in the direction of said first part of said proximal face and in which a second curved shape deflector extends in the direction of said third part of said proximal face . In this way, the air flow within the

BE2017 / 5153 is optimized as well as possible and also makes it possible to maximize the power of the wind within the device without disturbing the air flow.

Preferably, said first deflector has a first end which is connected to a first end of said second deflector so as to form a curved part, located opposite the second curved part of the fairing. According to an advantageous embodiment, the part formed by said first and second deflectors has a curvature greater than or equal to that of the second curved part of the fairing.

In a particularly advantageous embodiment, said distal face is provided with a covering element. This covering element also makes it possible to improve the aesthetics of the device and to facilitate its integration into the city in terms of town planning. Indeed, it is then possible to personalize the covering element to make it more aesthetic. The covering element can also serve to reinforce the general solidity of the device and to improve its physical, chemical and climatic resistance.

In a particular embodiment, said aerodynamics is molded in one piece. The fairing definition exposed to the wind, it undergoes many mechanical stresses which can cause the deterioration of said device. This characteristic makes it possible to give the fairing a particularly advantageous mechanical resistance in so far as the latter then has fewer points of weakness.

Other embodiments of the device according to the invention are indicated in the appended claims.

The present invention also relates to a streamlined wind turbine, preferably with a vertical axis, comprising the fairing device according to the present invention. This faired wind turbine has the advantage of being able to accelerate the wind within said device, which in turn supplies electricity efficiently. In addition, the wind turbine

BE2017 / 5153 fairing also takes advantage of all the aforementioned advantages linked to the device and to the various embodiments of the latter.

Preferably, the wind turbine is a vertical axis wind turbine, for example of the Darrieus or Savonius type, or a horizontal axis wind turbine.

A Savonius type wind turbine is a vertical axis wind turbine whose movement is based on an aerodynamic torque induced by the deflection of the air flow on the blades of a wind turbine.

Advantageously, the device according to the invention can be used with a series of wind turbines with a horizontal axis, that is to say at least two wind turbines of this type.

Other embodiments of the faired wind turbine according to the invention are indicated in the appended claims.

The present invention also relates to a device for orienting an air flow towards a wind turbine arranged opposite a corner of a building, comprising an aerodynamic fairing which can be fixed relative to said corner of said building and having a distal face and a proximal face, which is located opposite said corner of said building and which forms with it an air flow passage, said proximal face having a first air inlet part forming a first section of flow of said passage intended to divert said air flow towards said wind turbine, a second housing part of said wind turbine form a second flow section of said passage and a third air outlet part form a third flow section of said passage arranged to deflect said air flow outside said device, characterized in that said second by tie is curved and extends, opposite said distal face of said fairing, and in that the second flow section of said passage is narrower than the first flow section of said passage.

BE2017 / 5153

In this embodiment, the device according to the invention is limited to the presence of a wind turbine and to a corner of the building.

In a particular embodiment, said second part has a radius of curvature between 0.2 and 1m, preferably between 0.2 and 0.9m, more preferably between 0.5 and 0.8m. In this way, the air flow within the device can be particularly accelerated, especially at the level of said second housing part of said wind turbine. This therefore allows the wind turbine to recover more energy at a specific location on the device.

In a particular embodiment, said aerodynamic fairing has in cross section at least one point of inflection, preferably at least two points of inflection, in order to further increase the speed of air flow in said second part of housing of said wind turbine.

Preferably, said first part is curved and extends opposite to said second curved part so as to form in cross section at least one point of inflection. In this way, the shape of said first part makes it possible to provide, in cross section, an inflection point which makes it possible to accelerate the air flow more optimally when the air flow is heard from said first flow section of said passage to said second passage flow section.

Advantageously also, said first curved part has a radius of curvature between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m. In this way, the selection of a radius of curvature makes it possible to optimize the flow of air within the device which can be particularly accelerated, especially at the level of said second flow section where the wind turbine is located. This therefore allows the wind turbine to recover more energy.

In a particular embodiment, said third part is curved and extends opposite to said second curved part of

BE2017 / 5153 so as to form, in cross section, at least one inflection point. This inflection point optimally evacuates the air flow outside the device.

Advantageously also, said third curved part has a radius of curvature between 0.5 and 5 m, preferably between 0.5 and 3 m, pies preferably between 0.5 and 2.5 m, The selection of a radius of curvature makes it possible to further optimize the speed of air flow at the outlet of the device.

In addition, in a particular embodiment, the device further comprises at least one curved-shaped deflector located opposite said proximal face of said aerodynamic fairing and being arranged to be disposed adjacent to said corner of said building. , the air flow can be maintained more intensely in said second passage flow section. In addition, this makes it possible to increase the vacuum zone and the suction phenomenon in the device according to the invention, which is favorable for significantly increasing the efficiency of the device in order to supply the wind turbine with sufficient air flow. .

In a particular embodiment, said at least one deflector of curved shape extends in the direction of said proximal face of said aerodynamic fairing. This has the effect of reducing said second flow section, which increases the power of the wind at said second section and therefore improves the recovery of electricity by a wind turbine located at this location.

Advantageously, said at least one deflector has a radius of curvature between 0.1 and 2 m, preferably between 0.2 and 1 m, more preferably between 0.2 and 0.7 m. A selection of the radius of curvature makes it possible to further accentuate the aforementioned effect at the entry of the device according to the invention when the air flow enters the first part to be effectively diverted towards the second part which has the second section. of flow.

BE2017 / 5153

In addition, in a particular embodiment of the device according to the invention, the latter comprises at least two deflectors of curved shape arranged opposite said proximal face of said aerodynamic fairing and arranged to be located adjacent to said corner of said building. when the device is located opposite a wind turbine, said at least two deflectors are located on either side of the corner of the building. This has in particular the effect of preventing the separation of the boundary layer and thus increasing the pressure difference between the first flow section and the third flow section, which makes it possible to improve the air flow speed. within the system. Consequently, the wind turbine located within the device can recover more energy.

In a particular embodiment of the device, a first curved shape deflector extends in the direction of said first part of said proximal face and in which a second curved shape deflector extends in the direction of said third part of said proximal face . In this way, the air flow within the device is optimized as well as possible and also makes it possible to maximize the power of the wind within the device without disturbing the air flow.

In a particularly advantageous embodiment, said distal face is provided with a covering element. This covering element also makes it possible to improve the aesthetics of the device and to facilitate its integration into the city in terms of town planning. Indeed, it is then possible to personalize the covering element to make it more aesthetic. The covering element can also serve to reinforce the general solidity of the device and to improve its physical, chemical and climatic resistance.

In a particular embodiment, said aerodynamic fairing is molded in one piece. The fairing being by definition exposed to the wind, it undergoes numerous mechanical stresses which can cause ia deterioration of said device. This characteristic

BE2017 / 5153 makes it possible to give the fairing a particularly advantageous mechanical resistance insofar as it then has fewer points of weakness.

Preferably, said second curved part has a vertex which extends in the direction of said wind turbine, preferably of the Savonius type, provided with a rotor, and in which a space remains between said vertex and said rotor, said space having a dimension between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%.

Even more advantageously, said at least two deflectors form a curved part substantially similar to said second curved part of said fairing. Said curved part formed by said at least two deflectors has a vertex which extends in the direction of said second curved part of said fairing and a radius of curvature greater than or equal to that of said second part of said fairing.

Preferably, said rotor of the wind turbine is located at a distance y from the top of said curved part formed by said at least two deflectors. The distance there is preferably between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%.

A vertical axis wind turbine, preferably of the Savonius type, can have a large area in the air, that is to say that the rotor of the wind turbine can partially block the passage of the air flow. .

This blocking surface can thus cause a pressure drop in the system, which limits the ability of the flow to pass through the device. Optimizing the pressure drop may consist in modifying the air flow passage surface by having a predefined space between the rotor and the top of said second curved part of said fairing and / or of the curved part formed by said at least two deflectors.

BE2017 / 5153

A predefined difference, as indicated above, makes it possible to further reduce the pressure drop that can be generated by the device and facilitates the flow of air, which, ultimately, improves your performance of the device according to the invention.

Other embodiments of the above-mentioned orientation device and according to the invention are indicated in the appended claims.

It is obvious that modifications can be made to said device according to the invention and to said faired wind turbine according to the invention so as to take into account the dimensions and any architectural particularities of the building, in particular at the corner of said building.

Other characteristics, details and advantages of the invention will emerge from the description given below, without limitation and with reference to the accompanying drawings.

Figure 1 shows a top view of an advantageous embodiment of a device according to the invention in the presence of a building, its corner and a wind turbine.

Figure 2 is an illustration from above of a preferred embodiment of a device according to the invention, which having two deflectors, in the presence of a building, its corner and a wind turbine.

Figure 3 is a top view of the device according to the invention illustrated in Figure 2, where radii of curvature have been shown.

FIG. 4 illustrates a top view of a preferred embodiment of the device according to the invention.

FIG. 5 illustrates a variant of a device according to the invention when it is located opposite a corner of a building.

FIG. 6 illustrates a perspective view of a preferred embodiment of a device according to the invention.

BE2017 / 5153

In your figures, your identical or analogous elements bear your same references.

The device according to the invention can be placed in front of a corner of a building or on a roof of a dwelling which is provided with a sharp edge or a corner.

The term "building corner" refers to any corner formed by the architecture of a building. A corner can thus have an edge, called "sharp", where an acceleration of the speed of the air flow takes place there. In addition, a building corner may have a right angle, or an angle less than or greater than 90 °, or a curved corner.

Figure 1 illustrates a preferred embodiment of a device according to the invention which comprises an aerodynamic fairing 4 fixed relative to a corner 2 of building 3 and having a distal face 5 and a proximal face 8, located opposite said corner 2 of building 3

As illustrated, the proximate face 8 of the fairing 4 forms an air flow passage 7 with the corner 2 of the building 3. In addition, said proximal face 8 has a first air intake part 8 which forms a first flow section 7a e of said passage 7, a second part 9, where is housed) a wind turbine 1. and which forms a second flow section, and a third air outlet part 10 which forms a third section 7c flow of said passage 7.

The first air inlet part 8 is curved and extends opposite to said second curved part 9 so as to form, in cross section, an inflection point 12. This inflection point 12, in cross section, results in a change in curvature which is located between the first flow section 7a and the second flow section 7b.

Likewise, the third part 10 of the air sorb is curved and extends opposite to said second curved part 9, so as to form, in cross section, an inflection point 13. This inflection point 13, in

BE2017 / 5153 cross section, results in a change in curvature which is located between the second flow section 7b and the third flow section 7c

As illustrated in Figure 1. it appears that said second part 9 is curved and extends, opposite said distal face 5, towards the corner 2 of the building 3 and said second section 7b of flow of said passage 7 is narrower than said first flow section 7a of said passage 7, which is also the case of the third flow section 7c, which is wider than the second flow section 7b.

The device illustrated makes it possible to orient an air flow e in the direction of the wind turbine 1 in order to supply it effectively with air flow e in order to produce electricity.

Preferably, said second curved part 9 has a top which extends in the direction of said wind turbine 1, preferably of the Savonius type, provided with a rotor (not illustrated), and in which a space remains between said top and said rotor. , said space having a dimension between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%.

Thus, said top of said second curved part 9 can be located at a distance x from said rotor of said wind turbine 1. This distance x being between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%.

In operation, the flow of air e or of the wind e, preferably turbulent, enters the device described above by the flow passage 7, in the first flow section 7a, located between the building and the first part 8 of the proximal face 6 of the aerodynamic fairing 4. When the air flow e is located in the first flow section 7a, the latter then strikes the curved shape of the second part 9, at the point inflection 12, At this point, the speed of the air flow e is accelerated, so that

BE2017 / 5153 the air flow effectively supplied the wind turbine. It is in the second section 7b of flow that the wind turbine can operate to produce electricity. When the air flow e passes from the first flow section 7a to the second flow section 7b, the narrowing of the latter makes it possible to further increase the speed of air flow in the zone which comprises the wind turbine 1.

Then, the air flow then reaches the third flow section 7c, which is wider compared to the second flow section 7b, at the second inflection point 13 and leaves the device through the third part 10.

When the first 8 and third 10 parts are curved, these may still include a straight and then curved portion for the portion which is connected to the second part 9, as illustrated in FIG. 1.

In FIG. 1, said first part 8 is connected to said third part 10 by the second part 9 at the two inflection points 12 and 13.

Preferably, the device described in Figure 1 does not include inflection points, in cross section. Thus, the first part 8 of air inlet and the third part 10 of air outlet can be rectilinear. In this way, the only curved part is formed by the second part 9 for housing the wind turbine 1.

Preferably, the third part is rectilinear so that the device has a single inflection point 16, 18, located between the first part 8 and the second part 9 or between the second part 9 and the third part 10,

Preferably, said second part 9 has a radius of curvature 11 between 0.2 and 1 m, between 0.2 and 0.9 m, more preferably between 0.5 and 0.8 m.

Advantageously, said first part 8 or said third part 10 has a radius of curvature between 0.5 and 5

BE2017 / 5153 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5

m.

Advantageously, said distal face 5 is provided with a covering element (not illustrated).

In addition, said aerodynamic fairing 4 can be molded in one piece.

Advantageously, the streamlined wind turbine is a wind turbine with vertical or horizontal axis

Preferably, the device illustrated is designed to fair at least one wind turbine with a vertical axis or a series of wind turbines with a horizontal axis (at least two wind turbines),

Figure 2 illustrates a preferred embodiment of the device according to the present invention, which includes all the elements described for Figure 1 above. In addition to the elements shown in FIG. 1, the device according to this second embodiment comprises two deflectors 18, 18 of curved shape, which are located on either side of the corner 2 of the building 3,

Each deflector 18, 18 extends in the direction of said proximal face 6 of said aerodynamic fairing 4. More precisely, the first deflector 18 extends in the direction of said first part 8 of said proximal face 6 and in which a second deflector 18 of curved shape extends towards said third part 10 of said proximal face 6.

The device illustrated in FIG. 2 also includes all the preferred modes indicated for FIG. 1,

In operation, the flow of air e or of the wind e, preferably turbulent, enters the device described above by the flow passage 7, in the first flow section 7a, located between the building 3 and the first part 8 of the proximal face 8 of the aerodynamic fairing 4. When the air flow e is located in the first flow section 7a, the latter then strikes the curved shape of the second part 9, at the level of the inflection point 12 as well as the

BE2017 / 5153 first deflector 18. At this time, the speed of the air flow e is accelerated, so that the air flow e efficiently feeds the wind turbine. It is in the second section 7b of flow that the wind turbine can operate to produce electricity. When the air flow e passes from the first flow section 7a to the second flow section 7b, the narrowing of the latter makes it possible to further increase the speed of air flow e in the zone which includes wind turbine 1,

Then, the air flow then reaches the third flow section 7c, wider compared to the second flow section 7b, at the second inflection point 13 and leaves the device through the third part 10. The presence of the second deflector 18 makes it possible to direct the air flow at the outlet of the device effectively without risking the formation of any vortex at the level of the wind turbine.

Thus, the power of the wind is used wisely and in the right place, in this case in the second section of flow 7b, where the wind turbine is located.

Figure 3 illustrates the device of Figure 2 and includes all the elements described for Figures 1 and 2 above. In this illustration, preferred radii of curvature of the first, second and third parts 8, 9, 10 have been illustrated, as well as first and second deflectors 18, 18. Thus, preferably, said second part 9 has a radius of curvature 11 between 0.2 and 1 m, between 9.2 and 0.9 m, more preferably between 9.5 and 9.8 m.

Preferably, said second curved part 9 has a top which extends in the direction of said wind turbine 1, preferably of the Savonius type, provided with a rotor, and in which a space remains between said top and said rotor, said space having a dimension between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%.

BE2017 / 5153

Even more advantageously, said at least two deflectors form a curved part substantially similar to said second curved part 9 of said fairing 4. Said curved part formed by said at least two deflectors 18, 18 has a vertex which extends in the direction of said second curved part 9 of said fairing 4 and a radius of curvature greater than or equal to that of said second part of said fairing.

Preferably, said rotor of the wind turbine is located at a distance y relative to the top of said curved part formed by said at least two deflectors 18, 18. The distance there is preferably between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%. Advantageously, said first curved part 8 has a radius of curvature 14 of between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m.

Preferably, said third curved part 10 has a radius of curvature 15 of between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m.

In addition, each deflector 16, 18 may have a radius of curvature 17 of between 0.1 and 2 m, preferably between 0.2 and 1 m, more preferably between 0.2 and 0.7 m,

Figure 4 illustrates a preferred embodiment) of the device according to the invention and includes all the elements described for Figure 2 above.

In addition, in this embodiment, said second curved part 9 has a top which extends in the direction of said wind turbine 1, preferably of the Savonius type, provided with a rotor, and in which a space remains between said top and said rotor, said space having a dimension between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%,

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Thus, said top of said second curved part 9 is located at a distance x from said rotor of said wind turbine 1, this distance x being between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20 %.

Said first deflector 16 has a first end which is connected to a first end of said second deflector 18 so as to form a curved part, situated opposite the second curved part 9 of the fairing. The curved part formed by said first and second deflectors 16, 18 has a greater radius of curvature (preferably equal) than that of the second curved part 9 of the fairing 4.

Said at least two deflectors 16, 18 form a curved part substantially similar to said second curved part 9 of said fairing 4. Said curved part formed by said at least two deflectors 16, 18 has a vertex which extends in the direction of said second part 9 curve of said fairing 4 and a radius of curvature greater than or equal to that of said second part 9 of said fairing 4,

Finally, said rotor of the wind turbine 1 is located at a distance y relative to the top of said curved part formed by said at least two deflectors, The distance y is preferably between 1 and 50% of the diameter of said rotor, preferably 5 and 25%, more preferably 10 and 20%.

FIG. 5 illustrates a particularly advantageous embodiment of the device according to the invention, when it is fixed to a corner 2 of building 3. Thus, the device comprises an aerodynamic fairing 4 fixed relative to the corner 2 of building 3, with using a fixing device and has a distal face 5 and a proximal face 6, located opposite said corner 2 of building 3.

As illustrated, the proximal face 6 of the fairing 4 forms an air flow passage 7 e with the corner 2 of the building 3. In addition, said proximal face 6 has a first air inlet part 8 which forms a first section 7a of flow e of said passage 7, a

BE2017 / 5153 second part 9, where a wind turbine 1 is housed, which forms a second flow section, and a third air outlet part 10 which forms a third flow section 7c of said passage 7.

As illustrated in Figure 5, it appears that said second part 9 is curved and extends, opposite said distal face 5, towards the corner 2 of the building 3 and said second section 7b of flow of said passage 7 is narrower than said first flow section 7a of said passage 7, which is also the case of the third flow section 7c which is wider than the second flow section 7b.

The device illustrated makes it possible to orient an air flow e in the direction of the wind turbine 1 in order to supply it effectively with air flow e in order to produce electricity.

In addition, the device according to this second embodiment comprises two deflectors 16, 18 of curved shape which are located on either side of the corner 2 of the building 3.

Each deflector 18, 18 extends in the direction of said proximal face 8 of said aerodynamic fairing 4. More specifically, the first deflector 16 extends in the direction of said first part 8 of said proximal face 8 and in which a second deflector 18 of curved shape extends towards said third part 10 of said proximal face 8.

As it appears in FIG. 5, the device according to this embodiment extends along a part of the corner 2 of the building 3, so as to fair the wind turbine located in its center.

Preferably, the wind turbine is positioned in the bisector of the external angle formed by the corner 2 of the building 3.

Figure 8 illustrates a preferred embodiment of the device according to the invention which includes all the elements described in Figure 1 above, except that it is fixed to a corner 2 of building 3 in a preferred configuration. According to this exemplary embodiment, it would be

BE2017 / 5153 possible to envisage assembling a series of planks so as to form the fairing according to the invention.

Preferably, the device described in Figure 1 does not include points of inflection, in cross section. Thus, the first part 8 of air intake and the third part 10 of air outlet can be rectilinear. In this way, the only curved part is formed by the second part 9 for housing the wind turbine 1.

Preferably, the third part is rectilinear so that the device has a single inflection point 18, 18, located between the first part 8 and the second part 9 or between the second part 9 and the third part 10.

Preferably, said second part 9 has a radius of curvature 11 of between 0.2 and 1 m, between 0.2 and 0.9 m, more preferably between 0.5 and 0.8 m,

Advantageously, said first part 8 or said third part 10 has a radius of curvature between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m.

Advantageously, said distal face 5 is provided with a covering element (not illustrated).

In addition, said aerodynamic fairing 4 can be molded in one piece.

It is understood that the present invention is in no way limited to the embodiments described above and that many modifications can be made without departing from the scope of the appended claims.

BE2017 / 5153

Claims (5)

1. Device for directing an air flow (e) towards a wind turbine (1) arranged to be arranged opposite a corner (2) of building (3), comprising an aerodynamic fairing (4) 5 capable of being fixed relative to said corner (2) of said building (3) and having a distal face (5) and a proximal face (8), which is arranged to face said corner (2) of said building (3) and forming with it an air flow passage (7), said proximal face (8) having a first air inlet part (8) forming a first 10 flow section (7a) of said passage (7) intended to deflect said air flow (e) towards said wind turbine (1), a second part (9) for housing said wind turbine (1) forming a second flow section (7b) of said passage (7) and a third air outlet part (10) forming a third flow section (7c) Passage (7) arranged to deflect said air flow (e) outside said device, characterized in that said second part (9) is curved and extends, opposite said distal face (5) of said shroud (4), and in that said second section (7b) of said flow passage (7) is narrower than ^â ADTE first section (7a) 20 flow of said passage (7), 2. Device according to claim 1, wherein said second part (9) has a radius of curvature (11) between 0.2 and 1 m, between 0.2 and 0.9 m, more preferably between 0.5 and 0.8 m, 3. Device according to claim 1 or 2, wherein said aerodynamic fairing (4) has in cross section had at least one point of inflection (12), preferably at least two points of inflection (12,13). 4. Device according to claim 3, wherein said first part (8) is curved and extends opposite to said second 30 part (9) curved so as to form in cross section at least one point of inflection (12). BE2017 / 5153 5, Device according to claim 4, wherein said first curved part (8) has a radius of curvature (14) between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0.5 and 2.5 m. 5 6. Device according to any one of claims 3 to 5, wherein said third part (10) is curved and extends opposite to said second part (9) curved so as to form, in cross section, at minus an inflection point (13). 7. Device according to claim 6, wherein said third curved part (10) has a radius of curvature (15) of between 0.5 and 5 m, preferably between 0.5 and 3 m, more preferably between 0, 5 and 2.5 m. 8. Device according to any one of the preceding claims, further comprising at least one deflector (18) of 15 curved shape located opposite said proximal face (6) of said aerodynamic fairing (4) and being arranged to be disposed adjacent to said corner (2) of said building (3). S. Device according to claim 8, wherein said at least one curved shape deflector (16) extends in the direction of said 20 proximal face (6) of said aerodynamic fairing (4). 10. Device according to claim 8 or 9, wherein said at least one deflector (16) has a radius of curvature (17) between 0.1 and 2 m, preferably between 0.2 and 1 m, more preferably between 0.2 and 0.7 m. 25 11. Device according to any one of claims 8 to 10, comprising at least two deflectors (16, 18) of curved shape disposed opposite said proximal face (8) of said aerodynamic fairing (4) and arranged to be located so adjacent to said corner (2) of said building (3), 12, Device according to claim 11, wherein a first deflector (18) of curved shape extends in the direction of said BE2017 / 5153 first part (8) of said proximal face (8) and in which a second deflector (18) of curved shape extends in the direction of said third part (10) of said proximal face (6). 13. Device according to any one of the preceding claims S, in which said distal face (5) is provided with a covering element (19). 14. Device according to any one of the preceding claims, in which said aerodynamic fairing (4) is molded in one piece. 15. Faired wind turbine (1), preferably with a vertical axis, comprising the fairing device according to any one of the preceding claims. 18. Device for orienting an air flow (e) towards a wind turbine (1) arranged opposite a corner (2) of a building 15 (3), comprising an aerodynamic fairing (4) which can be fixed relative to said corner (2) of said building (3) and having a distal face (5) and a proximal face (8), which is located opposite said corner (2) of said building (3) and which forms with it an air flow passage (7), said proximal face (8) having a first inlet part (8) 20 of air forming a first section (7a) for the flow of said passage (7) intended to deflect said air flow (e) in the direction of said wind turbine (1), a second portion (9) for housing said wind turbine (1) forming a second section (7b) for the flow of said passage (7) and a third air outlet part (10) closing a third section 25 (7c) for the flow of said passage (7) arranged to deflect said air flow (e) outside said device, characterized in that said second part (9) is curved and extends, opposite to said distal face (5) of said fairing (4), ot in that said second flow section (7b) of said passage (7) is narrower than said first 30 section (7a) of flow of said passage (7). BE2017 / 5153 17. Device according to claim 16, in which said second curved part (9) has a top which extends in the direction of said wind turbine (2) provided with a rotor, and in which a space remains between said top and said rotor. , said space having a 5 dimension between 1 and 50% of the diameter of said rotor, of BE2017 / 5153 BE2017 / 5153 BE2017 / 5153