JP2023059550A - Wind power generation system - Google Patents

Abstract

To provide a wind power generation system that can improve utilization factor of equipment.SOLUTION: A wind power generation system 100 includes an artificial wind generator 10 and a wind power generator 20. The artificial wind generator 10 generates an artificial wind. The wind power generator 20 includes a blade 2 and a power generator 3. The blade 2 is configured to rotate with artificial wind. The power generator 3 generates power with the rotation of the blade 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to wind power generation systems.

In recent years, wind power generation has attracted attention from an environmental point of view. Wind power generators need to be installed in places with high average wind speeds in order to secure power generation. Specifically, the wind power generator needs to be installed along the coast or on a mountain top (see Patent Document 1).

JP 2014-101756 A

As described above, even if the wind power generator is installed in a place where the average wind speed is high, there is a problem that the capacity factor of the wind power generator is low because the natural wind is not always blowing.

An object of the present invention is to provide a wind power generation system capable of improving the facility utilization factor.

A wind power generation system according to the present invention includes an artificial wind generator and a wind power generator. The artificial wind generator generates artificial wind. A wind power generator has blades and a generator. The blades are configured to be rotated by artificial wind. A generator generates electricity by rotating blades.

According to this configuration, electric power can be generated by the artificial wind generated by the artificial wind generator. Since power can be generated without relying on natural wind in this way, the facility utilization factor can be improved. Further, when a ventilation fan is used as the artificial wind generator, the power required for the ventilation fan can be generated by the wind power generator, so energy can be saved.

Preferably, the wind power generator further has a plurality of support stays that support the power generator. The support stay has a stay body portion and a mounting portion. The stay body extends radially from the generator. The attachment portion is provided at the tip of the stay body portion.

Preferably, the stay main body is plate-shaped. Further, the stay main body is arranged such that the surface direction of the stay main body is along the direction of the air current of the artificial wind.

Preferably, the stay main body has a chamfered portion facing upstream.

Preferably, the wind power generator further has a diffuser arranged to surround the blades. The flow area of the diffuser increases downstream from the blades. According to this configuration, it is possible to increase the wind speed of the artificial wind flowing through the diffuser.

Preferably, the diffuser has a tubular body. The tubular body includes an inlet and an outlet. The diameter of the cylindrical main body portion increases toward the downstream side.

Preferably, the diffuser has a flange. The flange extends radially outward from the downstream end of the tubular body. According to this configuration, the wind speed of the artificial wind flowing through the diffuser can be further increased.

Preferably, the support stay supports the diffuser.

Preferably, the diffuser is circumferentially divided into a plurality of diffuser sections. Each diffuser portion is arranged between a pair of support stays adjacent in the circumferential direction.

Preferably, the wind power generation system further includes a casing and an impact section. The casing houses the wind generator. The impingement section is arranged downstream of the wind power generator. The collision part is arranged so that the airflow blown out from the outflow port of the diffuser collides therewith. According to this configuration, the diffuser effect can be improved more than when there is no collision portion. Here, the diffuser effect means _the ratio (P ₁ /P ₀ ) of the output (P ₁ ) of the wind power generator with the diffuser to the output (P 0 ) of the wind power generator without the diffuser.

Preferably, the artificial wind generator has a fan for generating the artificial wind. The blades are designed to rotate in the same direction as the fan rotates.

Preferably, the wind power generator is attached to a part other than the building.

ADVANTAGE OF THE INVENTION According to this invention, an equipment utilization factor can be improved.

Sectional drawing of a wind power generation system. A perspective view of a wind power generator. Sectional drawing of a wind power generator. Sectional drawing of the wind power generation system which concerns on a modification.

A wind power generation system according to this embodiment will be described below with reference to the drawings. In the following description, the axial direction is the direction in which the rotating shaft of the wind power generator extends. In addition, the circumferential direction is the circumferential direction of a circle around the rotation axis, and the radial direction is the radial direction of the circle around the rotation axis. Further, in the following description, the upstream side and the downstream side mean the upstream side and the downstream side of the airflow in the wind power generation system.

<Overall composition>
As shown in FIG. 1 , the wind power generation system 100 has an artificial wind generator 10 , a wind power generator 20 and a controller 30 . The rotation axis O of the artificial wind generator 10 and the rotation axis O of the wind power generator 20 are arranged substantially on the same line.

<Artificial wind generator>
The artificial wind generator 10 is configured to generate artificial wind. The artificial wind means not natural wind but artificially generated wind. The artificial wind can be generated by, for example, a blower or the like, by creating a temperature difference, or by running a moving body.

Specifically, as the artificial wind generator 10, a rooftop ventilation fan, a wall pressure ventilation fan, a centrifugal fan, an axial fan, or the like can be used. In addition, in this embodiment, the artificial wind generator 10 is a rooftop ventilation fan. The artificial wind generator 10 is installed on the roof of a building such as a factory, a warehouse, or a building, and used for ventilation of the building. The artificial wind generator 10 has a casing 11 , a fan 12 and a motor 13 .

Casing 11 houses fan 12 and motor 13 . Casing 11 also houses wind power generator 20 . The casing 11 has a duct 111 and a hood 112 (an example of a collision portion).

Duct 111 is attached to the roof of the building. The duct 111 also communicates with the space within the building in which it is installed. The duct 111 has a rectangular shape in plan view. A frame member 113 is attached to the inner wall surface of the duct 111 by welding or the like.

The hood 112 is arranged above the duct 111 . Hood 112 is arranged to cover duct 111 . A hood 112 is attached to the duct 111 . The hood 112 is arranged downstream of the wind power generator 20 .

The hood 112 has a top plate 112a and side plates 112b. The hood 112 opens downward. The top plate 112a faces the wind power generator 20 in the axial direction. The top plate 112a has a rectangular shape in plan view. The side plate 112b extends downward from the outer peripheral edge of the top plate 112a. Side plate 112 b is arranged to surround the upper end of duct 111 . A gap is formed between the inner peripheral surface of the side plate 112 b and the outer peripheral surface of the duct 111 . The artificial wind is discharged to the outside through this gap.

A fan 12 and a motor 13 are arranged in the duct 111 . Fan 12 is rotatably attached to motor 13 . A motor 13 rotates the fan 12 . Motor 13 is attached to duct 111 . Specifically, the motor 13 is attached to the frame member 113 by a motor support member 131 .

An airflow (artificial wind) is generated in the duct 111 by rotating the fan 12 . Specifically, the rotation of the fan 12 generates an upward airflow in the duct 111 . By colliding with the hood 112 , this airflow travels horizontally and travels outside through the gap between the duct 111 and the hood 112 .

<Wind generator>
As shown in FIG. 2 , the wind power generator 20 has multiple blades 2 , a power generator 3 , multiple support stays 4 , and a diffuser 5 . The wind power generator 20 is configured to generate power using the artificial wind generated by the artificial wind generator 10 . The wind generator 20 is attached to the artificial wind generator 10, not to the building.

Blades 2 are configured to be rotated by artificial wind generated by artificial wind generator 10 . The blades 2 are designed to rotate in the same direction as the fan 12 rotates. Therefore, the rotating direction of the blades 2 is the same as the rotating direction of the fan 12 . Blades 2 are attached to generator 3 . A plurality of blades 2 radially extend from the generator 3 .

The generator 3 is configured to generate power by rotation of the blades 2 . Electric power generated by the generator 3 is stored or used by the control unit 30 .

The support stay 4 supports the generator 3 . Specifically, a plurality of support stays 4 radially extend from the generator 3 . The support stay 4 is plate-shaped. The support stay 4 also supports the diffuser 5 .

The support stay 4 has a stay body portion 41 and a mounting portion 42 . The stay body portion 41 is plate-shaped. The stay body portion 41 is arranged such that its surface direction is along the direction of the airflow. Therefore, it is possible to reduce the resistance of the stay main body 41 against the airflow. The width of the stay body portion 41 gradually increases radially outward.

The attachment portion 42 is attached to the tip of the stay body portion 41 . The attachment portion 42 is attached to a member inside the duct 111 . Specifically, the attachment portion 42 is attached to the frame member 113 in the duct 111 by fastening members such as bolts.

The diffuser 5 is cylindrical. The diffuser 5 is arranged so as to surround the blade 2 . The flow area within the diffuser 5 increases downstream from the blades 2 . A tip surface of the blade 2 faces the inner peripheral surface of the diffuser 5 . Moreover, a gap is formed between the tip surface of the blade 2 and the inner peripheral surface of the diffuser 5 .

FIG. 3 is a cross-sectional view of the wind power generator 20. As shown in FIG. In addition, since the internal structure of the generator 3 is the same as the conventional one, the details are omitted. As shown in FIG. 3 , the diffuser 5 has a tubular body portion 51 and a flange portion 52 . The cylindrical body portion 51 is open in the airflow direction. The tubular body portion 51 includes an inlet 511 and an outlet 512 . The artificial wind flows into the tubular main body 51 through the inlet 511 and is discharged from the tubular main body 51 through the outlet 512 .

The cylindrical body portion 51 increases in diameter toward the downstream. That is, the diameter of the cylindrical body portion 51 increases toward the outflow port 512 . In addition, the diameter of the cylindrical body portion 51 also increases toward the upstream side. That is, the diameter of the cylindrical body portion 51 increases toward the inlet 511 . For this reason, the cylindrical body portion 51 has a constriction. The diameter of the outflow port 512 is larger than the diameter of the inflow port 511 .

The flange portion 52 extends radially outward from the downstream end portion of the tubular body portion 51 . That is, the flange portion 52 is formed at the end portion of the tubular main body portion 51 on the outflow port 512 side. It should be noted that the flange portion 52 and the tubular main body portion 51 are formed as one member.

As the flow passage area of the diffuser 5 is gradually narrowed on the upstream side in this manner, the artificial wind flowing through the tubular main body 51 is accelerated. Further, since the flow passage area of the diffuser 5 gradually increases and the flange portion 52 is formed, a vortex of the air current is generated and a negative pressure region is formed downstream of the wind power generator 20 . As a result, the wind speed of the artificial wind flowing through the diffuser 5 can be increased.

Further, the hood 112 is arranged downstream of the wind power generator 20 so as to collide with the artificial wind blown out from the outlet 512 of the diffuser 5 . Therefore, the direction of the airflow blown out from the outlet 512 of the diffuser 5 is changed to the radially outer side of the diffuser 5 by the hood 112 . As a result, the diffuser effect can be improved more than when the hood 112 is not provided. The diffuser effect is the ratio of the output (P ₁ ) of the wind power generator 20 with the diffuser 5 to the output (P ₀ ) of the wind power generator 20 without the diffuser 5 (P ₁ /P ₀ ). means

As shown in FIG. 2, the diffuser 5 is divided into a plurality of diffuser portions 50 in the circumferential direction. In addition, the diffuser 5 in this embodiment is divided into four diffuser portions 50 .

Each diffuser portion 50 is arranged between a pair of support stays 4 adjacent in the circumferential direction. The diffuser portion 50 extends in the circumferential direction. The diffuser portion 50 has an arc shape when viewed in the axial direction. Both ends of the diffuser portion 50 are fixed to the support stay 4 by fastening members such as bolts.

As shown in FIG. 1, the diffuser 5 is partially arranged within the duct 111 . Specifically, the inlet 511 of the tubular main body 51 is arranged inside the duct 111 , and the outlet 512 and the flange 52 of the tubular main body 51 are not arranged inside the duct 111 .

The control unit 30 is configured to store electric power generated by the wind power generator 20 . Specifically, the control unit 30 is configured to convert AC power generated by the wind power generator 20 into DC power and store the DC power in a battery. Further, the control unit 30 may be configured such that it is converted into AC power by a power conditioner and supplied to a system power supply or other electrical equipment.

[Modification]
Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications are possible without departing from the gist of the present invention.

Modification 1
Although the hood 112 is used as an example of the collision portion in the above embodiment, the collision portion may have other configurations. For example, the collision part can be configured by arranging the wind power generator 20 in a duct and bending the duct downstream of the wind power generator 20 . In addition, a collision section can also be configured by arranging a baffle plate on the downstream side of the wind power generator 20 .

Modification 2
As shown in FIG. 4, a pressurized ventilation fan for walls can be used as the artificial wind generator 10 . In this case, the artificial wind generator 10 has a fan 12 , a motor 13 , a frame 14 and a mounting frame 15 . The mounting frame 15 is attached to an opening formed in the building. The mounting frame 15 is cylindrical and extends through the building.

The frame 14 is attached to the attachment frame 15 . Specifically, the frame 14 is attached to one opening of the mounting frame 15 (the opening on the right side in FIG. 4). Note that the frame 14 includes a bell mouth 14a. The motor 13 is attached to the frame 14 via a motor support member 131 . Further, the wind power generator 20 is attached to the mounting frame 15 by the support stays 4 . Note that the wind power generator 20 may be directly attached to a building.

Modification 3
The tubular body portion 51 of the diffuser 5 may not have a constriction. That is, the cylindrical main body 51 may be configured such that the diameter increases from the inlet 511 toward the outlet 512 .

Modification 4
Although the wind power generator 20 has the diffuser 5 in the above embodiment, the configuration of the wind power generator 20 is not limited to this. That is, the wind power generator 20 does not have to have the diffuser 5 .

Modification 5
Although the wind power generator 20 is arranged on the downstream side of the artificial wind generator 10 in the above embodiment, it may be arranged on the upstream side of the artificial wind generator 10 .

Modification 6
In the above embodiment, the diffuser 5 has a tubular shape, but the diffuser 5 does not have to be tubular as long as it surrounds the blades 2 . For example, the diffuser 5 may be composed of a plurality of diffuser portions arranged so as to surround the blade 2 . In addition, when the diffuser 5 is not cylindrical, the area surrounded by the plurality of diffuser portions is the area of the flow path.

Modification 7
Although the diffuser 5 is divided into a plurality of diffuser sections 50 in the above embodiment, the configuration of the diffuser 5 is not limited to this. For example, the diffuser 5 may be configured in a tubular shape by one member.

Modification 8
Although the diffuser 5 has the flange portion 52 in the above embodiment, the configuration of the diffuser 5 is not limited to this. For example, the diffuser 5 may not have the flange portion 52 .

Modification 9
In the above embodiment, the duct 111 and the top plate 112a are rectangular in plan view, but these shapes are not limited to this. For example, the duct 111 and the top plate 112a may be circular in plan view.

Modification 10
In the above embodiment, the wind power generator 20 is a so-called horizontal axis wind turbine, but the configuration of the wind power generator 20 is not limited to this, and may be a vertical axis wind turbine.

Modification 11
The stay body portion 41 may have a chamfered portion facing the upstream side. That is, the stay body portion 41 may be chamfered at the corners facing the upstream side. Specifically, the corners of the stator main body 41 may be rounded to be R-chamfered, or the corners of the stator main body 41 may be obliquely cut to be C-chamfered. More preferably, the entire surface facing the upstream side of the stator body portion 41 may be curved.

REFERENCE SIGNS LIST 10 artificial wind generator 112 hood 20 wind power generator 2 blades 3 power generator 4 support stay 41 stay main body 42 mounting portion 5 diffuser 50 diffuser portion 51 cylindrical main body 511 inlet 512 outlet 52 flange

Claims (12)

an artificial wind generator for generating artificial wind;
a wind power generator having blades configured to be rotated by the artificial wind, and a power generator generating power by the rotation of the blades;
A wind power generation system comprising:
The wind power generator further has a plurality of support stays that support the power generator,
The support stay has a stay main body extending radially from the generator, and a mounting portion provided at a tip of the stay main body.
The wind power generation system according to claim 1.
The stay main body has a plate shape, and is arranged so that its surface direction is aligned with the direction of the artificial wind.
The wind power generation system according to claim 2.
The stay main body has a chamfered portion facing the upstream side,
The wind power generation system according to claim 2 or 3.
The wind power generator further includes a diffuser arranged to surround the blades and having a flow area that increases downstream from the blades.
The wind power generation system according to any one of claims 1 to 4.
The diffuser has a cylindrical main body that includes an inlet and an outlet and has a diameter that increases downstream.
The wind power generation system according to claim 5.
The diffuser has a flange portion extending radially outward from a downstream end portion of the tubular body portion,
The wind power generation system according to claim 6.
The support stay supports the diffuser,
A wind power generation system according to any one of claims 5-7 depending on any one of claims 2-4.
The diffuser is divided into a plurality of diffuser parts arranged in a circumferential direction,
Each diffuser portion is arranged between a pair of support stays adjacent in the circumferential direction,
A wind power generation system according to any one of claims 5-7 depending on any one of claims 2-4.
a casing housing the wind power generator;
a collision part arranged downstream of the wind power generator and arranged so as to collide with the artificial wind blown out from the outlet of the diffuser;
further comprising
The wind power generation system according to any one of claims 5 to 9.
The artificial wind generator has a fan for generating artificial wind,
The blades are designed to rotate in the same direction as the fan.
The wind power generation system according to any one of claims 1 to 10.
The wind power generator is attached to a part other than a building,
The wind power generation system according to any one of claims 1 to 11.

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