KR20100079520A - Blade apparatus for wind power generation and wind power generator having the same - Google Patents

Abstract

PURPOSE: A blade arrangement for wind power generation and an aerogenerator including the same are provided to reduce installation fee by preventing surface condensation using a simple attachment. CONSTITUTION: A blade arrangement for wind power generation comprises a cover shaped attachment(120) and a blade(110). The blade comprises a leading edge(112) and a following edge(114). The cover shaped attachment is attached on the blade. The attachment is detachably attached on the blade to be separated with a furnace.

Description

Blade Apparatus and Wind Power Generator with Wind Power {Blade Apparatus for Wind Power Generation and Wind Power Generator Having the Same}

The present invention relates to a blade device for wind power generation and a wind power generator having the same. Specifically, by having an attachment that can easily remove dew condensation at the end of the blade, wind power generation can reduce the installation cost and reduce the weight. It relates to a blade device for and a wind turbine having the same.

In general, a wind power generator is a device that generates electric power by converting wind energy obtained from wind resources into electrical energy using a rotor that is a rotor.

The wind power generation can be expected to be a power generation method using wind kinetic energy, which has a great effect of replacing fossil fuels, and provides economical power supply to underdeveloped areas where it is difficult to supply electric facilities. It can rationalize domestic land use. In addition, some specific regions can be used as tourism resources by creating large-scale wind farms.

Looking at the configuration of the facilities according to the wind power generation, a fuselage having a rudder at the rear is installed on the top of the post so that the position is changed according to the wind direction, the blade is rotatably installed on the front end of the fuselage, depending on the rotation of the blade Generates an induced electromotive force, and the electromagnetic field generated therein has a structure in which a separate battery is charged.

That is, the rotor of the wind turbine is composed of a blade and the hub, by installing a drive device in the hub to adjust the pitch angle of the blade.

The blades are formed in accordance with the design conditions using airfoils to form a proper shape. The airfoil consists of a chord, camber, leading edge and trailing edge.

1 is a photograph showing the front condensation phenomenon of the blade for wind power generation, Figure 2 is a photograph showing an enlarged phenomenon of the front condensation generation of the blade.

When driving blades for wind power, dew condensation occurs near the leading edge of the blade due to climate change or rotational speed. Dew condensation refers to a phenomenon in which the moisture contained in the atmosphere forms water droplets on the surface of the object when the temperature of the atmosphere including moisture drops below the dew point.

In a wind power system, the blades have the same function as the engine, so the blades need special care to improve the generation efficiency. Condensation in the front edge of the blades due to the influence of climate and rotor rotation results in the effect of blade geometry changes, thus causing a change in the aerodynamic performance of the blades.

Specifically, due to condensation generated before the blade, the air flow becomes unstable due to stalling of the air flow around the blade, and as a result, the aerodynamic performance of the blade is drastically reduced. Therefore, a condensation preventing device or a condensation removing device is required.

To prevent leading condensation, air circulation systems that circulate hot air are often used inside the front edge of the blade. The air circulation system collects the heat generated by the engine and blows hot air through the air circulation system installed inside the blade.

As another method for preventing condensation, a system is used to separate condensation by planting a tube and blowing it using compressed air to remove condensation from condensation. At this time, the tube is inflated periodically to separate the resulting condensate serves to remove the generated condensate.

In addition, a system for removing condensation by using heat by planting all the heat wires using the battery resistance in front of the blade is also used. In order to construct such a system, the blade leading edge is made of a material having high electrical resistance when the system is manufactured, and if necessary, condensation is generated by raising heat generated by energization.

However, in order to apply a condensation prevention system using an air circulation system, a separate device capable of forming hot air is required. Rotorcraft propulsion systems, such as helicopters, can take advantage of the heat generated by the engine, but in wind power systems, additional equipment must be installed, resulting in cost problems. In addition, since the air circulation system must be installed inside the blade, there is a problem that the weight of the blade is increased and power generation efficiency is lowered.

Compressed air tube systems to remove condensation generated also require additional compressed air generation and storage and supply equipment, which creates cost problems. In addition, not only causes a weight problem due to the attachment of the tube, but also aerodynamic efficiency changes due to the change in blade shape due to the attachment, thereby lowering the power generation efficiency.

In the case of a condensation prevention system or a condensation removal system using a hot wire, since the hot wire must be installed throughout the blade, it is a waste of cost.

Accordingly, it is an object of the present invention to provide a wind turbine blade device and a wind turbine having the same that can easily remove condensation formed on the blade to restore the power generation performance of the wind turbine.

It is also an object of the present invention to provide a wind turbine blade device and a wind turbine having the same, which can bring additional weight savings by installing only the tip of the blade without installing condensation leaving / removing equipment throughout the blade. have.

Still another object of the present invention is to provide a wind turbine blade device and a wind turbine having the same, which can easily remove condensation using a simple attachment, thereby reducing installation costs.

In addition, an object of the present invention, by further providing a heating wire for the detachment of the attachment, to provide a wind turbine blade device and a wind turbine having the same that can ensure the removal of condensation in a double.

In order to achieve the above object of the present invention, a wind turbine blade device according to the present invention includes a blade formed to have a front and rear edge, and an attachment in the form of a cover attached to the blade, the attachment is And detachably attached on the blade to be detachable with condensation generated on the surface of the deposit.

The blade device for wind power generation according to the present invention may further include a heating wire formed on the blade. The hot wire is provided near the edge of the deposit to cut or detach the deposit when the deposit is not released by weight.

Preferably, the blade device for wind power generation according to the present invention may further include a temperature sensor for detecting the departure of the attachment, it is possible to detect the presence or absence of removal of the attachment using the temperature sensor.

Preferably, the attachment may be composed of a plurality, the plurality of attachments may be formed to overlap the blade.

Preferably, the attachment may be formed of at least one of vinyl or paper.

Preferably, the attachment may be attached near the end of the blade.

That is, the attachment may be attached to surround the front edge of the blade near the end of the blade.

Alternatively, the attachment may be attached to surround the entire end of the blade.

Wind turbine according to the present invention, the hub is rotatably installed, the blade is connected to the edge of the hub to rotate the hub by the wind, and connected to the center of the hub receives the rotational force of the hub to generate electrical energy And a generator, wherein the blade includes an attachment to which the blade is detachably attached to an end thereof, and a heating wire positioned on an edge of the attachment and formed on the blade, wherein the attachment includes at least one of vinyl or paper material. Characterized in that it can be formed of either.

According to the wind turbine blade device and the wind turbine having the same, the condensation formed on the blade can be easily removed to restore the power generation performance of the wind turbine.

In addition, according to the blade device for wind power generation and the wind turbine having the same according to the present invention, by installing it only on the blade end, without installing the dew condensation prevention / removal equipment throughout the blade, it is possible to bring additional weight reduction effect. .

According to the blade device for wind power generation and the wind power generator having the same according to the present invention, condensation can be easily removed using a simple attachment, thereby reducing the installation cost.

In addition, according to the blade device for wind power generation and the wind turbine having the same according to the present invention, by further providing a heating wire for cutting or removing the attachment, there is an effect that can ensure the dew condensation in a double.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by quoting the contents described in other drawings under the above rules, and the contents determined or apparent to those skilled in the art may be omitted.

Figure 3 shows a perspective view of a wind turbine according to the present invention, Figure 4 is a schematic view of the configuration of the first embodiment of the blade device for wind power generation according to the present invention and an enlarged view in the vicinity of the blade end, Figure 5 The configuration diagram of the second embodiment of the blade device for wind power generation according to the drawings and the enlarged view in the vicinity of the blade tip are shown.

Referring to Figure 3, the wind turbine generator 10 according to the present invention is rotatably installed hub 300, the blade device (100, 200) connected to the edge of the hub to rotate the hub 300 by wind, And a generator (not shown) connected to the center of the hub 300 to receive the rotational force of the hub 300 to generate electrical energy.

Referring to FIG. 4, the blade apparatus 100 for wind power generation according to the first embodiment of the present invention includes a blade 110, an attachment 120, a heating wire 130, and a temperature sensor (not shown).

Blade 110 has a plurality of blades provided on the edge of the hub 300, generates a rotational force for rotating the hub 300 by the wind.

The blade 110 has a leading edge 112 and a trailing edge 114 formed with a predetermined space with the front edge 112.

Condensation (D) is mainly generated at the front edge 112 of the blade 110 due to climate change or rotational speed when the blade 110 is driven. Condensation (D) is gradually generated and stacked from the region of the lowest temperature of the blade 110, because the speed near the end of the blade 110 is the fastest the temperature here. Therefore, condensation D is generated and accumulated from the end of the blade 110.

In order to easily remove the condensation (D), the attachment 120 is provided near the end of the blade (110). Attachment 120 may be configured in a wrap shape consisting of a paper material or a vinyl material, and may be formed to surround the end of the blade 110.

The reason why the attachment 120 is formed to surround the end of the blade 110 is that from the wind turbine 10 to the end of the blade 110, from 80% to 100% (the end) of the length of the blade 110. This is because most of the part is responsible for power generation performance, and since the speed near the end is generally the fastest, the temperature change is sensitive and the generation of condensation starts.

Therefore, the attachment 120 according to the first embodiment is formed to surround the vicinity of the end of the blade 110, in particular near the front edge 112 of the end. Attachment 120 attached near the end is not only light in weight but also does not significantly change the shape of the blade 110, it is possible to prevent the performance degradation of the blade 110 according to the weight and shape changes.

Attachment 120 may be attached to blade 110 in general, such as by bonding, if the condensation (D) generated on the attachment 120 is a certain weight or more, the attachment 120 is the blade 110 It can be attached at a strength that can naturally leave the phase.

The heating wire 130 may be provided at an edge of the attachment portion to which the attachment 120 is attached on the end of the blade 110. Preferably, the heating wire 130 may be embedded in the blade 110 and may be connected to a separate power source. The hot wire 130 generates heat to cut the attachment 120 or to remove condensation (D).

The blade device 100 for wind power generation according to the first embodiment may further include a temperature sensor (not shown), and the temperature sensor may be provided at an end of the blade 110 in which the attachment 120 is installed. . The presence or absence of the attachment 120 may be detected by the temperature sensor, which will be described in detail later.

Hereinafter, the operation of the blade device 100 for wind power generation according to the first embodiment of the present invention will be described.

As described above, when the wind power generator 10 is driven, condensation D is generated in the front part 112 of the blade 110 due to climate change or the rotational speed of the blade 110. At this time, condensation is gradually generated and accumulated from the end of the blade 110, which is the lowest temperature region among the blades 110. That is, condensation D is produced at the surface of the attachment 120.

If condensation (D) continues to accumulate, the weight of the condensation (D) will also increase continuously. At this time, if the weight of the condensation (D) is more than the attachment performance of the predetermined attachment 120, a part of the attachment 120 is peeled off, the attachment 120 by the rotational inertia (centrifugal force) of the blade 110 Is peeled off from the blade 110 and completely escaped. Along with the detachment of the deposit 120, the condensation D generated on the deposit 120 may also be removed.

However, even if the weight of the dew condensation (D) exceeds the attachment performance of the preset attachment 120, the attachment 120 may not be peeled off from the blade 110. At this time, the temperature sensor detects a failure state of removal of the attachment 120.

For example, after a predetermined time has elapsed, the temperature at which a predetermined amount of condensation (D) is generated is set in advance from experimental data, and the like, and then the temperature sensor compares the preset data with the actual measured temperature after a predetermined time, and the blade 110. It is determined whether to remove the attachment (120). That is, when the actual measurement temperature is lower than the preset temperature, it may be determined that the deposit 120 is peeled off. Otherwise, it may be determined that the deposit 120 is not removed.

Alternatively, the temperature sensor may sense that the surrounding temperature of the blade 110 falls below a predetermined temperature, and may be configured to energize the heating wire 130 when the low temperature lasts for a predetermined time.

Since the heating wire 130 is formed along the edge of the attachment 120, when the heating wire 130 is operated, the attachment 120 may be cut and easily removed from the blade 110. In addition, the heating wire 130 may be used to remove condensation (D) by continuously generating heat even after the removal of the attachment (120).

As a modification of the attachment 120, the attachment 120 may be configured in plural. That is, the plurality of attachments 120 may be formed to be attached by forming a layered layer around the ends of the blades 110. At this time, the edge of the attachment 120 is to be attached to the blade 110, the inner attachment 120 is formed to be smaller in size than the outer attachment (120). Thereby, even after the outermost attachment 120 in which the dew condensation D is generated is peeled off from the blade 110, the inner attachment 120 is again exposed to the outside, thereby being used to remove newly created condensation D. Can be.

Referring to Figure 5, hereinafter will be described for the blade unit 200 for wind power generation according to the second embodiment of the present invention. Since the blade unit 200 for wind power generation according to the second embodiment has many of the same or similar points as the blade unit 100 for other wind power generation in the first embodiment, the following description will focus on the differences.

Attachment 220 is formed over the entire vicinity of the end of the blade 210 according to the second embodiment. That is, the attachment 220 has a shape surrounding the entire end of the blade 210 near the end. At this time, the heating wire 230 is formed at the distal end portion of the vicinity of the attachment 220 that is near the edge of the attachment 220.

Specifically, dew condensation (D) is formed in the vicinity of the front edge 212 of the blade 210 of the surface of the attachment 220 of the shape surrounding the entire end of the blade 210. The weight of the dew condensation (D) is increased so that a part of the attachment 220 is peeled off, and then the entire attachment 220 is peeled off due to the influence of rotational inertia. When the attachment 220 fails to be removed, the heating wire 230 is activated to cut the attachment 220 to start the removal or to remove condensation D generated by the heat of the heating wire 230.

Since other parts of the second embodiment are the same as or similar to those of the first embodiment, description thereof will be omitted for simplicity.

Blade apparatus for wind power generation according to the present invention (100, 200) and the wind power generator 10 having the same can not only restore the power generation performance through the removal of condensation, but also requires the installation of expensive condensation prevention / removal related equipment It does not require condensation prevention / removal equipment throughout the blades 110 and 210 and is effective in weight reduction. In addition, condensation (D) can be easily removed by using simple attachments (120, 220), thereby reducing installation and maintenance costs, and by using a double removal method by hot wires (130, 230). The effect of removing condensation (D) can be increased.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Included in this specification.

1 is a photograph showing the front condensation phenomenon of the blade for wind power generation;

Figure 2 is an enlarged photograph of the front condensation phenomenon of the blade for wind power generation;

3 is a perspective view of a wind turbine according to the invention;

4 is a configuration diagram and a partially enlarged view of a blade unit for wind power generation according to the first embodiment of the present invention;

5 is a configuration diagram and a partially enlarged view of a blade device for wind power generation according to the second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: wind power generator 100, 200: blade device

110, 210: Blade 112, 212: Leading edge

114, 214: Rear front 120, 220: Attachment

130, 230: heating wire 300: hub

D: Condensation

Claims (9)

In the blade device for wind power generation used for wind power generation, A blade formed to have a front edge and a rear edge; And A cover form attachment attached to the blade; Including, And said attachment is detachably attached to said blade so as to be detachable with condensation produced on a surface thereof. The method of claim 1, And a hot wire formed on the blade, wherein the hot wire is provided near the edge of the attachment. The method of claim 2, Blade device for a wind turbine further comprises a temperature sensor for detecting the departure of the attachment. The method of claim 3, wherein When the attachment is composed of a plurality, blades for wind power generation, characterized in that the overlap on the blade cover. The method according to any one of claims 1 to 4, The attachment is a blade device for wind power, characterized in that formed of at least one of a vinyl material or a paper material. The method of claim 5, The attachment is a blade device for wind power, characterized in that attached to near the end of the blade. The method of claim 6, The attachment is a blade device for wind power, characterized in that attached to surround the front edge of the blade. The method of claim 6, The attachment is a blade device for wind power, characterized in that attached to surround the entire end of the blade. A rotatably installed hub; A blade connected to an edge of the hub to rotate the hub by wind; And A generator connected to the center of the hub to generate electric energy by receiving the rotational force of the hub; Including, The blade, An attachment to which the blade is detachably attached near the tip; And A heating wire positioned on an edge of the attachment and formed on the blade; It includes, The attachment is a wind power generator, characterized in that formed with at least one of a vinyl material or a paper material.

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