WO2014038661A1

WO2014038661A1 - Wind-collecting wind turbine

Info

Publication number: WO2014038661A1
Application number: PCT/JP2013/074069
Authority: WO
Inventors: 壮一郎浅井; 正木舟; 邦光佐藤
Original assignee: 特定非営利活動法人国際資源活用協会
Priority date: 2012-09-06
Filing date: 2013-09-06
Publication date: 2014-03-13
Also published as: JP6110455B2; JPWO2014038661A1; JP6033870B2; JP2016001001A

Abstract

Provided is a wind-collecting wind turbine that is configured in an integrated manner from a front wind tunnel body (11), an intermediate wind tunnel body (12) having a wind turbine (14) arranged therein, and a rear wind tunnel body (13). The front wind tunnel body (11) comprises a wind flow inlet (11a) having a flat cross section in which the length of the width is greater than the length of the height, and is configured so that the cross-sectional area thereof decreases from the wind flow inlet (11a) to a connecting section (11b) with the intermediate wind tunnel body (12). The intermediate wind tunnel body (12) is configured so that the cross-sectional area of the front wind tunnel body (11) that has decreased either increases or retains the same cross-sectional area between the intermediate wind tunnel body (12) and a section (12a) that connects with the rear wind tunnel body (13). The rear wind tunnel body (13) comprises a wind flow outlet (13a) having a flat cross section in which the length of the width is greater than the length of the height, and is configured so that the cross-sectional area thereof increases from the section (12a) that connects with the intermediate wind tunnel body (12) to the wind flow outlet (13a).

Description

Wind-collecting windmill

The present invention relates to a wind-collecting wind turbine, and in particular, has a wind conduit (wind fuselage) with a specific structure to increase the wind speed on the rear surface of the wind turbine, thereby improving the rotational efficiency of the blades of the wind turbine and generating power. The present invention relates to a wind-collecting wind turbine that is improved in height and improved in stability, installation stability, and wind tunnel support stability.

In recent years, the prevention of global warming has been called out, and the development of new clean energy has become an urgent task. One of the clean energy sources that attracts attention is a wind power generation system that does not emit CO ₂ . However, at present, wind power generation is extremely low as a substitute for oil. This is because no means for effectively capturing wind energy has been developed.

Currently, lift type propeller type windmills are the mainstream of wind power generation. In the case of this propeller type windmill, since a long blade (propeller blade) is required, there is a problem that the windmill itself becomes too large. That is, conventionally, wind turbines have been developed in the direction of (1) providing blades with a diameter as large as possible, (2) installing wind turbines that are as tall as possible, and (3) installing them where wind blows as much as possible. However, as a result of increasing the diameter of the rotating blades in order to capture as much wind as possible, the struts have to be raised, become unstable to strong winds, and the operation must be stopped if the winds are too strong There is.

Therefore, in order to effectively use wind power more efficiently with a smaller windmill, focus on the wind flow behind the windmill and expand it in the wind flow direction as a wind power generator with the effect of increasing the wind speed of the wind In a wind turbine generator comprising a cylindrical wind tunnel and a wind turbine for power generation disposed in the vicinity of the wind inlet of the wind tunnel, the inclination angle of the side trunk with respect to the axis of the wind tunnel is in the range of 5 to 25 °. Furthermore, a wind power generator provided with a hook-shaped piece outside the rim of the wind outlet of the wind tunnel has been proposed (see, for example, Patent Document 1). In this case, the wind flow outside the wind tunnel body is dammed up with a hook-shaped piece, a vortex is generated on the back of the hook-shaped piece, and the wind flow behind the wind turbine entrains the flow of air molecules. It is thought that there is an effect to lower. However, there is a limit to the wrinkle width of the hook-shaped piece, and if it is too large, the effect is lost. Therefore, although it is effective for a small windmill having blades with a small turning radius, it is considered that the wind speed hitting the windmill is the same, so that it cannot be scaled up similarly. In other words, when the windmill blade diameter is increased, the area of the kite width is relatively decreased as compared with the cross-sectional area of the wind tunnel body, and the “coffin” effect is reduced.

By the way, when people pass through the valleys and arcades of buildings, they sometimes encounter unexpected strong winds. This is because the wind dammed up on the wall of the building, etc., concentrates on the valleys and arcade-passable points in search of voids. This is considered a kind of Laval tube effect. Therefore, a wind power generator has been proposed in which a windmill is placed in the center of a Laval tube in which a trumpet tube is joined back and forth, that is, in the vicinity of a minimum cross-sectional area (see, for example, Patent Document 2).

In addition, the present inventors provided a partition wall between the fan and the windmill, opened a hole in the wall, sent the wind with the fan through the hole, placed the windmill immediately after the hole, and examined the rotation speed of the windmill. did. Surprisingly, it was found that the number of revolutions of the wind turbine was much lower than when the wind was sent directly from the fan to the wind turbine without a partition. As a result, it turns out that not only the wind at the front of the wind turbine but also the amount of wind that passes from the periphery of the wind turbine to the back is important for the rotation of the wind turbine. A wind-collecting type windmill that improves the power generation efficiency of the windmill by sending a large amount of wind power to the rear surface of the windmill has been proposed (for example, see Patent Document 3).

The wind-collecting windmill as described above functions on the principle described below.

If the velocity of the air passing through the windmill is V, the density is ρ, and the pressure is P, the total energy of the wind per unit volume is (1/2) ρV ² + P = constant. Reduce, increase kinetic energy. This is a decrease in entropy (S) because V and P are rectified (opposite of randomization). Accordingly, the free energy increases by −TΔS (T: temperature). Therefore, the air collection type has higher energy efficiency. However, this is a case where a steady flow of a Bernoulli flow tube is assumed. If a windmill is put on this and energy is taken out, V behind a windmill will reduce and P will increase. Therefore, in order to approximate this to a steady flow, it is necessary to increase the speed of the low speed flow by friction of the high speed flow outside the flow tube. In other words, the air molecules behind the wind turbine that have been slowed down by the high-speed air molecules are knocked out backward.

JP 2003-278635 A JP 2008-520900 A JP2011-140887A

The conventional windmills, including the various windmills described above, capture the wind flow in a circle in accordance with the rotational surface of the circularly moving windmill. In other words, the cross section of the wind flow captured by the windmill was all a circle. Therefore, in order to capture a larger amount of air, a large circular cross-section wind inlet is required, and the supporting pillars that support it must be thick and long. Even if there is an advantage of high efficiency of the windmill, in the conventional windmill, the windmill itself may become unstable due to the pressure of a large amount of wind such as a typhoon, which may cause a problem of damage to the rotor blades (blades). In some cases, the use of the windmill must be stopped.

An object of the present invention is to solve the above-mentioned problems of the prior art in view of the above points, and to provide a wind-collecting wind turbine with improved blade rotation efficiency and, in turn, power generation voltage (power generation amount). It is in.

The inventors of the present invention have made the cross-sectional area the same by making the cross-section of the wind intake port not a circular shape but a non-circular shape such as an ellipse or a polygon, and a flattened shape extending horizontally. However, the present inventors have noticed that the height problem, installation problem, and the like can be solved by significantly lowering the support column, and the present invention has been completed. By constructing such a cross section, it is not necessary to support it with a high support on a mountain or a rooftop of a building, so that it is possible to install a very stable and stable windmill with a very low height. Therefore, it can be used even with high-speed and high-energy winds such as typhoons, and there is an advantage that the usage efficiency of the windmill is greatly increased.

A first wind-collecting wind turbine according to the present invention is a wind-collecting wind turbine integrally configured from a front wind tunnel, an intermediate wind tunnel in which the wind turbine is installed, and a rear wind tunnel, The front wind tunnel has a wind inlet having a flat cross section whose lateral length is larger than a vertical length, and the cross-sectional area is from the wind inlet to a connection portion with the intermediate wind tunnel. The intermediate wind tunnel is configured such that the reduced cross-sectional area of the front wind tunnel expands or maintains the same cross-sectional area up to the connection with the rear wind tunnel. And the rear wind tunnel has a wind outlet having a flat cross section whose lateral length is larger than its longitudinal length, and the cross-sectional area of the rear wind tunnel is the same as that of the intermediate wind tunnel. It is comprised so that it may expand between a connection part and this wind flow outlet.

A second wind collecting type windmill according to the present invention is a wind collecting type integrally configured from an inner wind tunnel in which the wind turbine is installed, and an outer wind tunnel provided outside the inner wind tunnel. In the wind turbine, the inner wind tunnel includes a front inner wind tunnel member having a wind inlet having a flat cross section whose horizontal length is larger than the vertical length, and a horizontal length longer than the vertical length. And a rear inner wind tunnel member having a wind outlet having a large flat cross section, and the front inner wind tunnel member has a cross-sectional area from the wind inlet to the rear inner wind tunnel member. The rear inner wind tunnel member has a reduced cross-sectional area of the front inner wind tunnel member extending from the connection portion to the wind outlet. Or the outer wind tunnel is configured to retain the same cross-sectional area Has a front outer wind tunnel member having a wind inlet having a flat cross section whose horizontal length is larger than its vertical length, and a flat cross section whose horizontal length is larger than its vertical length. A front outer wind tunnel member having a wind outlet having a cross section of the front outer wind tunnel member from the wind inlet to the connecting portion with the rear outer wind tunnel member. The rear outer wind tunnel member is configured to be reduced, and the reduced outer cross-sectional area of the front outer wind tunnel member is expanded from a connection portion with the front outer wind tunnel member to the wind outlet. The wind turbine is installed in the vicinity of the connecting portion between the front inner wind tunnel member and the rear inner wind tunnel member, and the wind inlet of the front outer wind tunnel member is the front inner wind turbine. Wind outflow of the rear inner wind tunnel member from the connecting portion between the trunk member and the rear inner wind tunnel member The wind outlet of the rear inner wind tunnel member is disposed at or near the connecting portion between the front outer wind tunnel member and the rear outer wind tunnel member. And

A third wind-collecting wind turbine according to the present invention is a wind collecting type integrally formed from an inner wind tunnel in which the wind turbine is installed, and an outer wind tunnel provided outside the inner wind tunnel. In the wind turbine, the inner wind tunnel includes a front inner wind tunnel member having a wind inlet having a flat cross section whose horizontal length is larger than the vertical length, and a horizontal length longer than the vertical length. And a rear inner wind tunnel member having a wind outlet having a large flat cross section, and the front inner wind tunnel member has a cross-sectional area from the wind inlet to the rear inner wind tunnel member. The rear inner wind tunnel member has a reduced cross-sectional area of the front inner wind tunnel member extending from the connection portion to the wind outlet. Or the outer wind tunnel is configured to retain the same cross-sectional area Has a wind inlet and a wind outlet having a flat cross section whose lateral length is larger than the vertical length, and the cross-sectional area of the wind inlet is formed to be reduced to the wind outlet. The wind turbine is installed in the vicinity of a connecting portion between the front inner wind tunnel member and the rear inner wind tunnel member, and the wind inlet of the outer wind tunnel is connected to the front inner wind tunnel member and the rear inner wind tunnel member. It is arranged between the connecting portion with the trunk member and before the wind outlet of the rear inner wind tunnel member, and the wind outlet of the outer wind tunnel is arranged at or near the wind outlet of the rear inner wind tunnel member. It is characterized by.

According to the wind-collecting wind turbine of the present invention, the wind flow has a flat cross section whose horizontal length is larger than the vertical length, and has a larger cross-sectional area than the cross-sectional area of the place where the wind turbine is installed. Since it has a flat cross section whose horizontal length is larger than its vertical length and has a wind outlet having a cross-sectional area larger than the cross-sectional area of the place where the wind turbine is installed In addition to improving the rotational efficiency of the blades and, in turn, the amount of power generation, it is possible to reduce the vertical dimension of the wind collecting wind turbine itself.

According to the wind collecting wind turbine of the present invention, the cross section of the wind tunnel body where the wind turbine is installed has a flat cross section (for example, an elliptical shape or a polygonal shape) whose horizontal length is larger than the vertical length. Non-circular horizontally long cross-section), and is composed of a wind tunnel body having a cross-section larger than the size of the windmill, so it may be on both sides of the side of the windmill, and in some cases, on the top and bottom sides of the windmill. In addition, there is a gap where the wind blows through. For this reason, the blown-out high-speed wind blows out the wind flow with a reduced speed on the rear surface of the wind turbine, and has an effect of restoring speed energy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a schematic configuration example showing an embodiment of a wind collecting wind turbine according to the present invention, where a propeller type wind turbine is installed. It is another embodiment of the wind collection type windmill which concerns on this invention, Comprising: The perspective view of the example of a typical structure which shows the case where a propeller type windmill is installed. FIG. 11 is a perspective view of a schematic configuration example showing still another embodiment of the wind-collecting wind turbine according to the present invention, in which a paddle type wind turbine is installed. FIG. 9 is still another embodiment of the wind-collecting wind turbine according to the present invention, and is a perspective view of a schematic configuration example showing a modification of FIG. 3, in which an installation portion of the paddle type wind turbine is cut open. The typical cross-sectional view of the wind collecting type windmill for demonstrating the installation aspect of the paddle type windmill in FIG.

According to the first embodiment of the wind-collecting wind turbine according to the present invention, the wind-collecting wind turbine includes a cylindrical front wind fuselage having a non-circular cross-sectional area and a wind turbine installed therein. A wind-collecting wind turbine integrally configured from a cylindrical intermediate wind tunnel having a non-circular cross-sectional area and a cylindrical rear wind tunnel having a non-circular cross-sectional area. The front wind tunnel has an elliptical or polygonal non-circular flat cross section that is larger in horizontal length (ie, horizontal width) than in vertical length (ie, vertical width). An inlet is provided, and the cross-sectional area is inclined linearly or curvilinearly from the wind inlet to the connection portion with the intermediate wind tunnel, and is reduced while maintaining its shape. The intermediate wind tunnel has an elliptical or polygonal non-circular flat cross section whose horizontal length is larger than the vertical length, and the reduced cross-sectional area of the front wind fuselage is the same as that of the rear wind fuselage. It is configured to be linearly or curvedly inclined up to the connecting portion, and to expand while maintaining its shape, or to maintain the same cross-sectional area. The rear wind tunnel has an elliptical or polygonal non-circular flat cross section whose lateral length is greater than its longitudinal length, and whose lateral length is greater than its longitudinal length. It has a wind outlet having an elliptical or polygonal non-circular flat cross section, and its cross-sectional area expands while maintaining its shape from the connection to the wind tunnel to the wind outlet. It is configured.

As described above, the cross section of the wind inlet of the front wind tunnel, the cross section of the connection portion between the front wind fuselage and the intermediate wind fuselage, the cross section of the connection portion between the intermediate wind fuselage and the rear wind fuselage, and the rear wind tunnel The cross section of the wind outlet has an oblong or polygonal non-flat flat shape whose lateral length is greater than its longitudinal length.

In the first embodiment, the wind turbine is installed in the vicinity of the connection portion between the front wind tunnel and the intermediate wind tunnel, for example, in the intermediate wind tunnel, and the end of the front wind tunnel or the tip of the intermediate wind tunnel As long as it is installed.

In the first embodiment, in order to integrally configure the front wind tunnel body, the intermediate wind tunnel body, and the rear wind tunnel body, the manufacturing method is not limited, and these may be formed by integral molding. Each may be produced separately and closely joined. The material of these wind tunnel bodies is preferably a material that does not easily deteriorate depending on the environment of the place where the wind collecting wind turbine is installed, but is not particularly limited. For example, it may be made of stainless steel, iron, aluminum, synthetic resin or the like.

The oval shape may be any shape as long as it is flat and horizontally long, and may be a so-called regular oval shape or an approximate oval shape. Also, if the polygon is flat and horizontally long, the shape is not limited. It may be triangular, quadrangular, pentagonal or hexagonal.

In the wind-collecting wind turbine according to the first embodiment, the wind-collecting wind turbine has a Laval tube shape. In the case of having a Laval tube shape, the area of the cross section thereof, as described in Japanese Patent Application Laid-Open No. 2011-140887, as particularly apparent from the graph shown in FIG. the cross-sectional area of air flow outlet of the cross-sectional area and the rear wind trunk and S _1, when the cross-sectional area of the place where the wind turbine is installed and the S _2, the ratio between S ₁ and _{_{S 2 a (S 1 / S}} 2) Is configured to satisfy the relationship of 1 <A <20, preferably 2 ≦ A <20. That is, when the cross-sectional area of the place where the windmill is installed is greater than or equal to the cross-sectional area of the wind inlet and outlet (A is 1 or less), conversely, the cross-sectional area of the place where the wind turbine is installed Is too small (greater than 20), the effect of the present invention tends not to be achieved. This theoretical basis is described in detail in Japanese Patent Application Laid-Open No. 2011-140887. Further, even if the cross-sectional area of the wind inlet of the front wind tunnel and the cross-sectional area of the wind outlet of the rear wind tunnel are the same cross-sectional area, the cross-sectional area of the wind wind inlet of the front wind tunnel is crossing the wind outlet of the rear wind tunnel. It may be larger than the area or vice versa.

According to the second embodiment of the wind-collecting wind turbine according to the present invention, the wind-collecting wind turbine includes a cylindrical inner wind fuselage in which the wind turbine is installed and the cross-sectional area is noncircular. The wind-collecting wind turbine is configured integrally with a cylindrical outer wind tunnel provided outside the inner wind tunnel and having a non-circular cross-sectional area. The inner wind tunnel includes a front inner wind tunnel member having an elliptical or polygonal non-circular flat cross section having a horizontal length larger than the vertical length, and a vertical length longer than the vertical length. A rear inner wind tunnel member having a wind outlet having an elliptical or polygonal non-circular flat cross section having a larger lateral length is integrally formed. The outer wind tunnel has a front outer wind tunnel member having an elliptical or polygonal non-circular flat cross section having a horizontal length larger than the vertical length, and a vertical length. And a rear outer wind tunnel member having a wind outlet having an elliptical or polygonal non-circular flat cross section whose lateral length is larger.

In the second embodiment, the front inner wind tunnel member maintains its shape with a cross-sectional area that is linearly or curvedly inclined between the wind inlet and the connecting portion with the rear inner wind tunnel member. The rear inner wind tunnel member is configured such that the reduced cross-sectional area of the front inner wind tunnel member is inclined linearly or curvilinearly from the connection portion to the wind outlet. It is configured to expand while maintaining the shape or to maintain the same cross-sectional area. The front outer wind tunnel member is configured such that the cross-sectional area thereof is linearly or curvedly inclined from the wind inlet to the connection portion with the rear outer wind tunnel member, and is reduced while maintaining its shape. The rear outer wind tunnel member has a reduced cross-sectional area of the front outer wind tunnel member that is linearly or curvedly inclined between the connection portion with the front outer wind tunnel member and the wind outlet. It is configured to enlarge while maintaining.

In the second embodiment, the windmill is near the connection portion between the front inner wind tunnel member and the rear inner wind tunnel member, that is, from the end of the front inner wind tunnel member to the tip of the rear inner wind tunnel member. It should just be installed between. It may be installed in the rear inner wind tunnel member. The wind inlet of the front outer wind tunnel member is disposed at a predetermined position between the connection portion between the front inner wind tunnel member and the rear inner wind tunnel member and before the wind outlet of the rear inner wind tunnel member. A wind outlet of the inner wind tunnel member is disposed at or near the connection portion between the front outer wind tunnel member and the rear outer wind tunnel member.

In the second embodiment, the front inner wind tunnel other than the wind inlet of the front inner wind tunnel member, the wind outlet of the rear inner wind tunnel member, the wind inlet of the front outer wind tunnel member, and the wind outlet of the rear outer wind tunnel member. As described above, the cross-section of the connection portion between the member and the rear inner wind tunnel member and the connection portion between the front outer wind tunnel member and the rear outer wind tunnel member is larger in the horizontal length than in the vertical length. It is preferably an elliptical or polygonal non-circular flat shape. In addition, the connection part of a front inner wind tunnel member and a back inner wind tunnel member, ie, the cross section of the vicinity of the position which arrange | positioned the windmill, may be circular.

In the second embodiment, in order to integrally form the front inner wind tunnel member and the rear inner wind tunnel member and the front outer wind tunnel member and the rear outer wind tunnel member, There is no limitation, and both may be integrally formed, or both may be separately manufactured and closely joined. Further, the inner wind tunnel member and the outer wind tunnel member are fixed by known attachment means. The material of these wind tunnel bodies is preferably a material that does not easily deteriorate depending on the environment of the place where the wind collecting wind turbine is installed, but is not particularly limited. For example, it may be made of stainless steel, iron, aluminum, synthetic resin or the like.

In the second embodiment, as described above, the oval shape may be any shape as long as it is flat and horizontally long, and may be a so-called regular oval shape or approximate oval shape, and the polygon is also flat. The shape is not limited as long as it is horizontally long. It may be triangular, quadrangular, pentagonal or hexagonal.

In the wind-collecting wind turbine according to the second embodiment, the inner wind tunnel body has a Laval tube shape. If having a Laval tube shape, as described above when the cross-sectional area of the air flow inlet cross-sectional area and air flow outlet of the inner-air fuselage and S _1, the cross-sectional area of the place where the wind turbine is installed and the S _2, S The ratio A (S ₁ / S ₂ ) between ₁ and S ₂ satisfies 1 <A <20, preferably 2 ≦ A <20. That is, when the cross-sectional area of the place where the windmill is installed is greater than or equal to the cross-sectional area of the wind inlet and outlet (A is 1 or less), conversely, the cross-sectional area of the place where the wind turbine is installed Is too small (greater than 20), the effect of the present invention tends not to be achieved. Further, the cross-sectional area of the wind inlet of the inner wind tunnel and the cross-sectional area of the wind outlet of the inner wind tunnel are the same as in the first embodiment, but the cross-sectional area of the wind inlet of the inner wind tunnel is the same. May be larger than the cross-sectional area of the wind outlet of the inner wind tunnel or vice versa. The above point is the same as that of the inner wind tunnel in the case of the outer wind tunnel.

According to the third embodiment of the wind-collecting wind turbine according to the present invention, the wind-collecting wind turbine includes a cylindrical inner wind fuselage in which the wind turbine is installed and the cross-sectional area is noncircular. The wind-collecting wind turbine is configured integrally with a cylindrical outer wind tunnel provided outside the inner wind tunnel and having a non-circular cross-sectional area. The inner wind tunnel is configured in the same manner as the inner wind tunnel in the second embodiment, and the outer wind tunnel is composed only of the front outer wind member in the second embodiment.

That is, the inner wind tunnel includes a front inner wind tunnel member having a wind inlet having an elliptical or polygonal non-circular flat cross section whose horizontal length is larger than the vertical length, and a vertical length. And a rear inner wind tunnel member having a wind outlet having an elliptical or polygonal non-circular flat cross section whose lateral length is larger than the vertical length. The outer wind tunnel member is configured such that the cross-sectional area thereof is linearly or curvedly inclined between the wind inlet and the wind outlet and is reduced while maintaining its shape.

In the third embodiment, the front inner wind tunnel member maintains its shape with a cross-sectional area that is linearly or curvedly inclined between the wind inlet and the connecting portion with the rear inner wind tunnel member. The rear inner wind tunnel member is configured such that the reduced cross-sectional area of the front inner wind tunnel member is inclined linearly or curvilinearly from the connection portion to the wind outlet. It is configured to expand while maintaining the shape or to maintain the same cross-sectional area. The outer wind tunnel has an elliptical or polygonal non-circular flat cross section with a horizontal length greater than the vertical length and a horizontal length greater than the vertical length. It has a wind outlet with an elliptical or polygonal non-circular flat cross section. The outer wind tunnel is maintained in its shape by being inclined linearly or curvilinearly between the cross-sectional area of the wind tunnel and the wind outlet provided at or near the wind outlet of the rear inner wind tunnel member. It is configured to reduce as it is.

In the third embodiment, the wind turbine is installed in the same manner as in the second embodiment, and the wind inlet of the outer wind tunnel is also a front inner wind tunnel member in accordance with the second embodiment. And the rear inner wind tunnel member and the front inner wind tunnel member before the wind outlet. Also, the shape of the connecting portion between the front inner wind tunnel member and the rear inner wind tunnel member, the shape of an ellipse or a polygon, the integration of the front inner wind tunnel member and the rear inner wind tunnel member, the inner wind tunnel body and the outer wind tunnel body The attachment and the like are also the same as in the second embodiment.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In the following drawings, the dimensions of each member are shown as a schematic configuration example by appropriately changing the scale of each member for convenience of explanation.

The wind-collecting wind turbine according to the first embodiment will be described below with reference to FIG. FIG. 1 is a perspective view illustrating a schematic configuration example of a wind-collecting wind turbine including an intermediate wind tunnel and a rear wind tunnel in which a front wind tunnel and a wind turbine are installed.

The wind-collecting wind turbine shown in FIG. 1 is a Laval tube wind turbine, and is integrally formed of a front wind tunnel 11, an intermediate wind tunnel 12, and a rear wind tunnel 13, and the propeller-type wind turbine 14 is disposed inside the intermediate wind tunnel 12. At a predetermined location, preferably at the tip thereof.

Forward wind body 11, while the length r ₂ of the transverse cross section has a wind flow inlet 11a of the vertical length of r ₁ greater than a flat rectangular shape, and its cross-section holds the same flat rectangular shape The airflow inlet 11a and the connecting portion 11b between the front wind tunnel body 11 and the intermediate wind tunnel body 12 are configured to be linearly (or curvilinearly) inclined and reduced along the wind flow direction. The length of the longitudinal cross-section of the connecting portion 11b is _{r 1,} the horizontal length is _{_{_{r 3 (r 1 <r 3}}} ). The vertical length of the wind inlet 11a may be the same as or longer than the vertical length of the intermediate wind tunnel 12 on which the wind turbine 14 is installed. Moreover, the vertical length of the intermediate wind tunnel body 12 may be the same as the vertical diameter of the windmill or may be larger than the vertical diameter of the windmill. Of course, there is a margin that allows the windmill 14 to rotate.

The intermediate wind tunnel 12 is linear or curved between the connection portion 11b and the connection portion 12a between the intermediate wind tunnel 12 and the rear wind tunnel 13 while maintaining the same flat rectangular shape with the reduced cross section. It is configured to be inclined while maintaining its shape, or to maintain the same cross-sectional area. In FIG. 1, the rectangular shape is configured to maintain the same cross-sectional area as it is. Since the intermediate wind tunnel body 12 is configured as described above, there is a gap around the wind turbine 14, that is, on both sides of the side surface of the wind turbine 14 and / or the upper and lower surfaces. For this reason, the wind blows through the gap as it is, and the high-speed airflow of the blown wind is supplied to the back of the windmill 14, and the collected high-speed airflow blows out the windflow with a reduced speed on the back of the windmill, thereby Can be recovered. When the paddle type wind turbine is installed as shown in FIGS. 4 and 5 to be described later, the intermediate wind tunnel 12 can be attached to the bottom surface of the intermediate wind tunnel 12 by appropriately installing the lower portion of the paddle type wind turbine. You may expand and comprise in such a shape.

The rear wind tunnel 13 has the same cross section from the connecting portion 12a (horizontal length r ₃ > long length r ₁ ) to the intermediate wind tunnel 12 having a flat rectangular cross section to the wind outlet 13a. While maintaining the shape, it is formed so as to expand linearly or curvedly along the wind flow direction. In FIG. 1, it forms so that it may expand linearly. Vertical length of the cross section of the air flow outlet 13a is r _1, the horizontal length is r _4. As for the vertical length, it is sufficient that the vertical lengths of the wind inlet 11a and the wind outlet 13a are equal to or longer than the vertical length of the intermediate wind tunnel 12, and regarding the horizontal length, r ₂ > r ₃ , r _It is only necessary to satisfy the relationship of ₄ > r ₃ . In FIG. 1, r ₂ = r ₄ is set.

As described above, the cross section of the wind inlet 11a and the connection portion 11b of the front wind tunnel 11, both end portions (

connection portions

11b and 12a) of the intermediate wind tunnel 12 and the wind outlet 13a of the rear wind tunnel 13 are flat oval. Or what is necessary is just to have a polygonal shape. In FIG. 1, it is shown as a rectangle.

The cross-sectional shapes of the wind inlet 11a, the wind outlet 13a, and the

connection portions

11b and 12a shown in FIG. 1 may all be the same or different. Also, at that time with respect to the area of the cross section, as described above, the cross-sectional area of the cross-sectional area and air flow outlet 13a of air flow inlets 11a and S _1, the cross-sectional area of the place where the wind turbine is installed and the S _2, The ratio A (S ₁ / S ₂ ) between S ₁ and S ₂ satisfies 1 <A <20, preferably 2 ≦ A <20. That is, if the cross-sectional area of the place where the windmill is installed is larger than or equal to the cross-sectional area of the wind inlet 11a and the wind outlet 13a (A is 1 or less), conversely, the cross-sectional area of the place where the windmill is installed If it is too small (greater than 20), the effect of the present invention tends not to be achieved. Further, the cross-sectional area of the wind inlet of the front wind tunnel and the cross-sectional area of the wind outlet of the rear wind tunnel are the same cross-sectional area as in the case of the first embodiment. The cross sectional area of the inlet may be larger than the cross sectional area of the wind outlet of the rear wind tunnel or vice versa.

The wind-collecting wind turbine according to the second embodiment will be described in detail below with reference to FIG.

FIG. 2 shows a wind tunnel having a double structure, and the wind inlet of the front outer wind tunnel member constituting the outer wind tunnel is arranged at a predetermined position in the longitudinal direction of the rear inner wind tunnel member constituting the inner wind tunnel. It is a perspective view which shows the typical structural example of the wind collection type windmill currently used.

The wind-collecting wind turbine shown in FIG. 2 has a cylindrical inner wind tunnel body 22 having a flat rectangular cross section whose horizontal length is longer than the vertical length, and a vertical length provided outside the inner wind tunnel body. A propeller type windmill 21 is integrally formed with a cylindrical outer wind tunnel body 23 having a flat rectangular cross section longer than the horizontal length, and is installed at a predetermined location inside the inner wind tunnel body 22. The inner wind tunnel 22 has a Laval tube shape, and is integrally formed of a front inner wind tunnel member 22a and a rear inner wind tunnel member 22b. In FIG. 2, the propeller-type wind turbine 21 is a rear inner wind tunnel member 22b. It is installed inside. The windmill 21 may be installed in the rear end part of the front inner wind tunnel member 22a. The outer wind tunnel body 23 has a Laval tube shape, and is configured integrally with a front outer wind tunnel member 23a and a rear outer wind tunnel member 23b.

The front inner wind tunnel member 22a includes a front inner wind tunnel member 22a having a wind inlet 22c (vertical length r ₁ <horizontal length r ₂ ) having a flat rectangular cross section, and a flat rectangular cross section. A rear inner wind tunnel member 22b having a wind outlet 22e having a plane (vertical length r ₁ <horizontal length r ₄ ) and a connecting portion 22d (having a flat rectangular cross section; vertical length r It is fixed via ₁ <lateral length r ₃ ). Vertical length _{r 1} is wind flow inlet 22c of the front inner wind tunnel member 22a, connecting portion 22 d, and the air flow outlet 22e of the rear inner wind tunnel member 22b, may be different and the same. In particular, the vertical length of the connecting portion 22d is preferably larger than the diameter of the windmill 21. Further, the horizontal lengths r ₂ and r ₃ may satisfy the following relationship.
r ₂ > r ₃

The front inner wind tunnel member 22a has a vertical length r ₁ (same as the vertical length r ₁ of the cross section of the place where the wind turbine 21 is installed) and a horizontal length r ₂ (transverse of the place where the wind turbine 21 is installed). between the air flow inlet 22c having a cross-section having a larger) than the lateral length r ₃ face to the connection portions 22 d, the cross-sectional area, linearly inclined in the flow direction of the air its shape It is formed to shrink while maintaining the above. The rear inner wind tunnel member 22b is formed such that the reduced cross sectional area of the front inner wind tunnel member 22a maintains the same cross sectional area between the connecting portion 22d and the wind outlet 22e (in the wind flow direction). And may be enlarged while maintaining its shape by inclining linearly or curvilinearly). The vertical length of the wind inlet 22c and the connecting portion 22d may be the same as or longer than the vertical length of the place where the windmill is installed.

The front outer wind tunnel member 23a has a vertical length equal to the vertical length of the cross section of the rear inner wind tunnel member 22b at a predetermined position outside the connection portion 22d and the air outlet 22e. Length: having a flat rectangular shape having r ₁ (or a longitudinal length larger than r ₁ ) and a lateral length (r ₅ ) greater than the lateral length of the transverse section of the rear inner wind tunnel member 22b It has the wind inlet 23c which consists of a cross section. The front outer wind tunnel member 23a extends from the wind inlet 23c to the connecting portion 23d (a location corresponding to or near the wind outlet 22e of the rear inner wind tunnel member 22b) along the wind flow direction. It is configured such that it is inclined linearly (or curvilinearly) and reduced while maintaining its shape. The connecting portion 23d has a flat rectangular cross section having a longitudinal length r ₁ (or a longitudinal length greater than r ₁ ) and a lateral length r ₆ .

The rear outer wind tunnel member 23b extends between the connecting portion 23d and the wind outlet 23e with its cross-sectional area inclined linearly (or curvilinearly) along the wind flow direction while maintaining its shape. It is configured as follows. In FIG. 2, the connecting portion 23d is disposed so as to be provided at a location corresponding to the wind outlet 22e of the rear inner wind tunnel member 22b, but may be in the vicinity of the location. The air outlet 23e has a flat rectangular cross section having a longitudinal length r ₁ (or a longitudinal length greater than r ₁ ) and a lateral length r ₇ .

Wind flow inlet 22c and connection portion 22d of the front inner wind tunnel member 22a, wind flow outlet 22e of the rear inner wind tunnel member 22b, wind flow inlet 23c and connection portion 23d of the front outer wind tunnel member 23a, and wind flow of the rear outer wind tunnel member 23b. As described above, the cross-section of the outlet 23e is a flat non-circular shape (a flat rectangular shape is shown in FIG. 2) spreading laterally such as an elliptical shape or a polygonal shape. The elliptical shape and polygonal shape in this case are as described above.

The relationship between the cross-sectional areas of the wind inlet 22c, the connecting portion 22d, the wind outlet 22e, the wind inlet 23c, the connecting portion 23d, and the wind outlet 23e can be summarized as follows. The cross-sectional area of the wind inlet 22c is larger than the cross-sectional area of the connecting portion 22d, the cross-sectional area of the connecting portion 22d is smaller than or equal to the cross-sectional area of the wind outlet 22e, and the total cross-sectional area of the wind inlet 23c (the rear inner wind tunnel member 22b). The cross-sectional area of the wind flow outlet 23e is smaller than the area of the wind outlet 23e, and the substantial cross-sectional area of the wind inlet 23c (the area obtained by subtracting the cross-sectional area of the rear inner wind tunnel member 22b from the total cross-sectional area of the wind inlet 23c) is connected. It is larger than the substantial cross-sectional area of the portion 23d (the area obtained by subtracting the cross-sectional area of the rear inner wind tunnel member 22b from the total cross-sectional area of the connecting portion 23d).

In FIG. 2, since the inner wind tunnel body 22 is configured as described above, there is a gap through which the wind blows as it is on both sides of the side surface of the windmill 21 and / or the upper and lower surfaces. For this reason, the wind blows through the gap as it is, and the high speed airflow of the blown wind is supplied to the back surface of the windmill 21, and the collected high speed airflow blows out the windflow with a reduced speed on the back surface of the windmill, and the speed energy is increased. Can be recovered.

The flat cross-sectional shape of each of the wind flow inlets and the wind flow outlets may be the same shape or different shapes. Also, the location thereof with respect to the area of the cross section, as described above, when the inner air trunk 22, the cross-sectional area of the cross-sectional area and air flow outlet 22e of the air flow inlet 22c (23e) and S _1, the wind turbine is installed (e.g., the connecting portion 22d near) when the cross-sectional area of the _{S 2,} _{S 1} and _{S 2} ratio of _{a _(S} 1 / S ₂₎ is 1 <a <20, preferably of 2 ≦ a <20 related It is configured to satisfy. That is, when the cross-sectional area of the place where the windmill is installed is greater than or equal to the cross-sectional area of the wind inlet and outlet (A is 1 or less), conversely, the cross-sectional area of the place where the wind turbine is installed Is too small (greater than 20), the effect of the present invention tends not to be achieved. The magnitude of S ₁ are as described above.

The inner wind tunnel body 22 and the outer wind tunnel body 23 are fixedly mounted by an attachment member (not shown), and the outer wall of the inner wind tunnel body 22 (rear inner wind tunnel member 22b) and the outer wind tunnel body 23 (front outer wind tunnel). A straight air flow path is formed between the inner wall of the member 23a).

In the conventional propeller type windmill used in FIGS. 1 and 2, the blades must be enlarged to capture a wide range of winds, even on a building or mountain. There wasn't. Huge propellers have torsional problems, vibration problems, noise problems, etc., and there are also problems with qualifying wind speeds, which usually must be stopped when there is a wind speed exceeding 25 m / sec. 1 and 2, the wind-collecting wind turbine shown in FIGS. 1 and 2 is extremely effective because it is low in height and has good installation stability, and traps winds having typhoon-class wind speeds. It is also possible.

The windmill that can be used in the present invention is not particularly limited. In addition to the propeller type windmill as shown in FIGS. 1 and 2, for example, a paddle type windmill can also be used. For example, a wind-collecting windmill provided with a paddle-type windmill provided with a blower duct as shown in FIG. 3 can be configured in the same manner as in the case of the propeller-type windmill.

The wind-collecting type windmill shown in FIG. 3 is obtained by replacing the propeller-type windmill with the paddle-type windmill 15 in the wind-collecting type windmill shown in FIG. 1, and the other configurations are the same as those in FIG. Is omitted.

In a paddle type windmill, usually, for example, a plurality of blades made up of a pair of flat blade members are mounted so as to be axially symmetric with respect to the blade rotation axis and to be rotatable, and the wind receiving surface receives wind. Are configured to rotate. The blade member of the blade has a surface of the blade member that is effective for rotation of the blade, which is a wind receiving surface, and a surface that is not a wind receiving surface and has resistance to rotation. As shown in FIG. 3, in order to efficiently apply the taken-in wind to the wind receiving surface of the blade of the wind turbine and generate wind turbine output by the wind energy, the wind is shielded against the blade member that resists rotation. It is preferable to make it. In the case of the wind-collecting wind turbine of the present invention in which such a paddle type wind turbine is installed, means for taking in the wind flow below and sideways of the blades is provided in order to solve the problem of deceleration of the wind flow that has passed through the blades. Thus, the wind flow that has been decelerated is accelerated by contacting and mixing the wind flow that has been taken in with the decelerated wind flow, and the wind turbine output is increased. At this time, the main flow and the new tributary are configured so that the wind flow is first squeezed and accelerated at the intake of the wind flow, and then the discharge port is expanded to take a Laval tube shape as a whole.

4 and 5, which are modified examples of the wind collecting wind turbine shown in FIG. 3, are the wind collecting wind turbine shown in FIG. 1, in which the propeller type wind turbine is replaced with the paddle type wind turbine 16. Since the other configuration is substantially the same as the configuration of FIG. 1, detailed description other than the installation mode of the paddle type wind turbine 16 is omitted.

The wind-collecting wind turbine shown in FIGS. 4 and 5 is a wind-collecting wind turbine provided with a paddle-type wind turbine 16, and the wind-receiving surfaces of the blade members 17 of the plurality of blades of the paddle-type wind turbine 16 It is installed and attached in the intermediate wind tunnel so that the wind flowing through can be received efficiently. 4 and 5, unlike the wind-collecting wind turbine in which the entire paddle-type wind turbine 15 shown in FIG. 3 is installed and attached in the intermediate wind fuselage 12, the upper portion of the paddle-type wind turbine 16 (the number of blade members 17) is different. Is installed in the flow path of the wind flowing in the intermediate wind tunnel 12, and the lower part of the paddle type wind turbine 16 (the remaining half of the number of the blade members 17) is provided on the bottom surface of the intermediate wind tunnel. It is installed in the opening and is configured to be attached. In this case, the ratio of the upper part and the lower part may be arbitrary, and it is only necessary that the wind is efficiently applied to the wind receiving surface of the blades of the paddle type wind turbine. The wind-collecting wind turbine shown in FIGS. 4 and 5 is configured so as to have a Laval tube shape as a whole, so that the problem of deceleration of the wind flow that has passed through the blade member 17 of the paddle-type wind turbine 16 is solved as described above. Can rather be accelerated and increase windmill output.

In addition, although the wind-collecting type windmill of the present invention is used on a mounting table, it is preferable that the mounting table is rotatable in order to direct the wind inlet to the direction in which the wind blows. In addition, about this mounting base, it is good also as a base as shown in FIG. 5, for example.

In this example, the wind-collecting wind turbine of the present invention was compared with a normal propeller-type wind turbine.

The rotation area of a propeller type windmill having a rotating surface with a blade of 10 m (radius) is A ₁ (314 m ² ), the velocity of the wind hitting the rotating surface is V, the air density is α, and the windmill passes through this windmill. When wind energy (the kinetic energy) and S _1, the following equation holds.
[Equation 1]
S ₁ = (1/2) · αA ₁ V ³ = (314/2) αV ³

If you half (5m) length of the blade (the radius) In the above, the rotation area _{_{A 2 = (1/4) · A}} 1 = 314 / 4m 2 = 78.5m 2. A wind collecting wind turbine shown in FIG. 1 using this propeller type wind turbine is assumed.

If the cross-sectional area of the wind inlet is A ₁ (314 m ² ), the wind inlet is rectangular, and its vertical length r ₁ = 10 m (with a margin to allow the blades to rotate), the horizontal length r ₂ = 314/10 = 31.4 m. The front wind tunnel of this wind-collecting wind turbine is squeezed while maintaining the shape of the wind inlet, and the cross-sectional area B at the position where the propeller-type wind turbine is installed is half of the cross-sectional area of the wind inlet (1/2) · A _{When 1} = 157 m ² , the horizontal length is 1/2 · r ₂ = 15.7 m. Relationship wind speed (2V) and wind energy S ₂ passing through this surface is as follows.
[Equation 2]
S ₂ = (1/2) · αA ₂ · (2V) ³ = αA ₁ V ³ = 314 αV ³

Therefore, even if the blade radius is halved and the rotation area is ¼, the wind energy is doubled. Therefore, when obtaining the same wind energy as the original windmill, the rotation area can be reduced to 1/8. The radius R ₁ of the blade at this time is 314/8 = 3.14R ₁ ² , and therefore R ₁ = 3.54 m. In other words, the wind-collecting wind turbine can be downsized to about 1/3 only by the turning radius.

Further, when the aperture from the wind inlet of the front wind tunnel to the propeller type wind turbine position is reduced to 1/4, the wind speed is quadrupled. Therefore, since the wind energy density is 64 times, the rotation area of the windmill may be 1/64. Then, the rotation radius R ₂ of the propeller type wind turbine is 314/64 = 3.14R ₂ ² , and therefore R ₂ = 1.25 m. That is, the size can be reduced to a height of 1/8.

Moreover, the cross-sectional area of a propeller type windmill position at this time, since a _1/4 · A 1, which is 16 times the rotation area. Accordingly, the gap (gap) outside the wind turbine (outer periphery of the wind turbine) is 15 times the wind turbine area, and the wind flow passing through the wind turbine back without passing through the wind turbine is also 15 times the amount of wind passing through the wind turbine. Therefore, it is possible to secure a sufficient air volume to cancel the decrease in the flow velocity and the increase in the back pressure on the rear surface of the wind turbine.

In the Laval tube, according to Bernoulli's theorem, the flow velocity increases and the pressure decreases according to Bernoulli's theorem, but this is in a continuous flow tube. However, if you install a windmill, you lose energy and lose continuity. Therefore, in order to maintain the continuity as much as possible and bring it closer to the ideal state, it is necessary to accelerate the back flow in order to reduce the decrease in flow velocity and the increase in pressure at the back of the wind turbine. For this purpose, it is only necessary to accelerate by friction and mixing by a high-speed wind flow that is in contact with the wind flow outside the wind turbine passage flow tube. The more outer high-speed wind current is, the better.

From the above, the wind-collecting wind turbine of the present invention can be reduced in size by increasing the aperture, and the porosity on the both sides of the wind turbine, in some cases, on the upper and lower surfaces of the wind turbine is increased, and the external air volume is increased. The high-speed wind flow that increases and blows out the wind flow with reduced speed on the rear surface of the wind turbine, and has an extremely remarkable effect of restoring the speed energy. In this case, as described above, the aperture ratio A has a limiting condition of 1 <A <20. What is necessary is just to find an optimal condition within this range and to design appropriately.

In this embodiment, a Laval tube type wind-collecting wind turbine as shown in FIG. 1 and a wind-collecting wind turbine having a double-type wind tunnel composed of an inner wind tunnel and an outer wind tunnel as shown in FIG. The wind turbine was installed on the roof of the house, the wind turbine was operated with natural ventilation, the generator load was measured with a voltmeter, and the generator load with the propeller type wind turbine alone was compared.

As a windmill, in the case of FIG. 1, FIG. 2 or a propeller type windmill alone, a small wind turbine for wind power generation (product name: SW-114) manufactured by Natural Wind Company is used. It was. The windmill area (wind receiving area) of this windmill was 7.5 cm × 7.5 cm × 3.14 cm≈177 cm ² .

In the Laval tube-like wind-collecting wind turbine in which the wind turbine is installed at the center as shown in FIG. 1, the wind turbine 14 is installed at the inner end of the intermediate wind fuselage 12 which is the constricted portion of the central portion of the Laval tube. did. Cross section of the air flow inlet 11a of the front wind fuselage 11 on the front of the wind turbine 14, the same 150mm diameter of the wind turbine has a vertical length r ₁ of the (of course, the wind turbine is to have some margin to allow rotation) The horizontal length r ₂ (r ₂ = 470 mm) is set so that the cross-sectional area is four times the wind turbine area, and the cross-sectional area extends from the wind inlet 11 a to the connecting portion 11 b with the intermediate wind tunnel 12. In between, it is formed so as to shrink linearly along the wind flow direction while maintaining its shape. The cross section of the connecting portion 11b has a vertical length r ₁ of 150 mm which is the same as the diameter of the windmill (of course, a slight margin is provided so that the windmill can rotate), and is set to be twice the windmill area. Length r ₃ (235 mm). The cross-sectional area of 11a = 47 cm × 15 cm = 705 cm ² and the cross-sectional area of 11b = 23.5 cm × 15 cm = 353 cm ² .

In the intermediate wind tunnel 12, a windmill is installed at the tip portion inside thereof, and the connection portion 12 a with the rear wind tunnel 13 is formed to have the same cross-sectional area as the connection portion 11 b with the front wind tunnel 11. Yes.

The rear wind tunnel 13 is formed to linearly incline along the wind flow direction from the connecting portion 12a with the intermediate wind tunnel 12 to the wind outlet 13a and expand while maintaining its shape. Yes. The cross section of the wind outlet 13a has a vertical length r ₁ of 150 mm which is the same as the diameter of the wind turbine, and a horizontal length r ₄ (r ₄ = 470 mm) set so that the cross-sectional area is four times the wind turbine area. Configured.

By configuring as described above, high-speed air flow into the gap provided on both sides of the wind turbine 14 can be a passage passing through, also, than the vertical diameter length r ₁ windmills 14 of the connecting portion 11b When it is large, a passage through which a high-speed flow passes is formed in gaps provided on both side surfaces and upper and lower surfaces of the wind turbine 14, and the flow of the high-speed wind passes through the wind turbine. It becomes possible to push the flow directly toward the wind outlet 13a.

In wind collecting windmill of Figure 2, the cross section of wind flow inlet 22c is a large flat rectangular shape than the lateral length a vertical length, vertical length r ₁ and windmill diameter = 150 mm approximately the same And has a horizontal length r ₂ set so that the cross-sectional area is twice the wind turbine area (354 cm ² ), and the cross-section is between the wind inlet 22c and the connecting portion 22d, and the wind flow direction It is formed so as to be reduced while maintaining its shape by inclining linearly along the line. The rear inner wind tunnel member 22b is formed so as to maintain the same cross-sectional area as the cross-sectional area of the connection portion 22d up to the wind outlet 22e along the wind flow direction.

The cross section of the wind inlet 23c of the front outer wind tunnel member 23a is a flat rectangular shape as in the case of the wind inlet 22c of the front inner wind tunnel member (vertical length r ₁ <horizontal length r ₅ ). . For the cross-section of the air flow inlet 23c, longitudinal length r ₁ of the same city as the windmill diameter = 150 mm, the rear inner wind tunnel member from the total cross-sectional area of the lateral length r ₅ that substantially cross-sectional area (wind flow inlet 23c The area obtained by subtracting the cross-sectional area of 22b) was set to be twice the windmill area (354 cm ² ). The cross-sectional area is linearly inclined along the wind flow direction between the wind inlet 23c and the connecting portion 23d between the front outer wind tunnel member 23a and the rear outer wind tunnel member 23b, and the shape is maintained. It is formed to shrink. The substantial cross-sectional area of the connection portion 23d (the area obtained by subtracting the cross-sectional area of the rear inner wind tunnel member 22b from the total cross-sectional area of the connection portion 23d) is half the substantial cross-sectional area of the wind inlet 23c along the wind flow direction. It was set to narrow down to. Next, the cross section of the rear outer wind tunnel member 23b connected to the connection portion 23d is linearly inclined toward the wind outlet 23e along the wind flow direction so as to expand while maintaining its shape. Formed. The outer wind tunnel 23 has a Laval tube-like shape. In the above case, the total cross-sectional area of the wind inlet 23c (including the total cross-sectional area of the rear inner wind tunnel member 22b) is smaller than the area of the wind outlet 23e, and the substantial cross-sectional area of the wind inlet 23c is substantially equal to the connection portion 23d. It is larger than the cross-sectional area (the area obtained by subtracting the cross-sectional area of the rear inner wind tunnel member 22b from the total cross-sectional area of the connecting portion 23d).

Using two types of wind-collecting wind turbines configured as described above and a control propeller-type wind turbine alone, power generation experiments were conducted at various wind speeds. The relationship between the output voltage (V) measured with a voltmeter and the wind speed (m / s) is shown in Table 1 below.

As is clear from Table 1, the wind-collecting wind turbine of the present invention in which the cross section of the wind inlet and outlet of the wind tunnel has a flat rectangular shape obtains an extremely high output voltage as compared with the case of the propeller type wind turbine alone. I can see that

In this embodiment, when the cross-sectional area of the wind inlet and the cross-sectional area of the wind outlet of the inner wind tunnel is S ₁ and the cross-sectional area at the position where the wind turbine is installed is S ₂ , A = S ₁ / S ₂ = However, when A was less than 20, that is, when A = 15, 10 and 5, the same result as in the above example was obtained.

According to the wind-collecting wind turbine of the present invention, since a high power generation voltage can be obtained, it can be used in technical fields that require high wind energy, such as wind power generation.

DESCRIPTION OF SYMBOLS 11 Front wind tunnel

11a Wind inlet

11b Connection part 12 Intermediate wind tunnel 12a Connection part 13 Back wind tunnel 13a Wind outlet 14 (propeller type) windmill 15 Paddle type windmill 16 Paddle type windmill 17 Wing member 21 (propeller type) windmill 22 Inner wind Body 22a Front inner wind tunnel member 22b Rear inner wind tunnel member

22c Wind inlet

22d Connection part

22e Wind outlet 23 Outer wind tunnel 23a Front outer wind tunnel member 23b Rear outer wind tunnel member

23c Wind inlet

23d Connection part 23e Wind outlet r ₁ Vertical Length r ₂ to r ₇ horizontal length

Claims

A wind-collecting wind turbine integrally configured from a front wind tunnel, an intermediate wind tunnel in which a wind turbine is installed, and a rear wind tunnel, the front wind tunnel being laterally longer than a vertical length A wind inlet having a flat cross section with a longer length, and the cross-sectional area of the wind inlet is reduced between the wind inlet and the connecting portion with the intermediate wind tunnel, The wind tunnel is configured such that the reduced cross-sectional area of the front wind tunnel expands or retains the same cross-sectional area up to the connection with the rear wind tunnel, And a wind outlet having a flat cross section whose lateral length is larger than its longitudinal length, and the cross-sectional area of the wind outlet is enlarged from the connection portion with the intermediate wind tunnel to the wind outlet. A wind-collecting type windmill characterized by being configured as described above.
In a wind-collecting wind turbine integrally configured from an inner wind tunnel in which the wind turbine is installed and an outer wind tunnel provided outside the inner wind tunnel, the inner wind tunnel has a longitudinal length of A front inner wind tunnel member having a wind inlet having a flat cross section whose lateral length is larger, and a rear having a wind outlet having a flat cross section whose horizontal length is larger than its vertical length. The front inner wind tunnel member is integrally formed with the inner wind tunnel member, and the front inner wind tunnel member is formed so that the cross-sectional area thereof is reduced from the wind inlet to the connection portion with the rear inner wind tunnel member. The rear inner wind tunnel member is configured such that a reduced cross-sectional area of the front inner wind tunnel member increases or maintains the same cross-sectional area from the connecting portion to the wind outlet. And the outer wind tunnel has a lateral length rather than a vertical length. A front outer wind tunnel member having a wind flow inlet having a flat cross section and a rear outer wind tunnel member having a wind flow outlet having a flat cross section whose horizontal length is larger than the vertical length. The front outer wind tunnel member is formed so that a cross-sectional area thereof is reduced between the wind inlet and a connection portion with the rear outer wind tunnel member, and the rear outer wind tunnel member The member is formed such that a reduced cross-sectional area of the front outer wind tunnel member expands from a connection portion with the front outer wind tunnel member to the wind outlet, and the wind turbine It is installed in the vicinity of the connection portion between the wind tunnel member and the rear inner wind tunnel member, and the wind inlet of the front outer wind tunnel member is connected to the front inner wind tunnel member and the rear inner wind tunnel member from the connection portion. Arranged between the rear inner wind tunnel member and the front of the wind outlet, Square wind flow outlet of the inner wind tunnel member, said front outer wind tunnel member and said rearward connecting portion between the outer wind tunnel member or wind collecting windmill, characterized in that it is arranged in its vicinity.
In a wind-collecting wind turbine integrally configured from an inner wind tunnel in which the wind turbine is installed and an outer wind tunnel provided outside the inner wind tunnel, the inner wind tunnel has a longitudinal length of A front inner wind tunnel member having a wind inlet having a flat cross section whose lateral length is larger, and a rear having a wind outlet having a flat cross section whose horizontal length is larger than its vertical length. The front inner wind tunnel member is integrally formed with the inner wind tunnel member, and the front inner wind tunnel member is formed so that the cross-sectional area thereof is reduced from the wind inlet to the connection portion with the rear inner wind tunnel member. The rear inner wind tunnel member is configured such that a reduced cross-sectional area of the front inner wind tunnel member increases or maintains the same cross-sectional area from the connecting portion to the wind outlet. And the outer wind tunnel has a lateral length rather than a vertical length. The wind turbine has a wind inlet and a wind outlet having a flat cross section, and the cross section of the wind inlet is reduced to the wind outlet, and the wind turbine includes the front inner wind tunnel member and It is installed in the vicinity of the connection portion with the rear inner wind tunnel member, and the wind inlet of the outer wind tunnel body is connected to the rear inner wind tunnel member from the connection portion between the front inner wind tunnel member and the rear inner wind tunnel member. A wind-collecting wind turbine, which is disposed between before a wind flow outlet and the wind flow outlet of the outer wind tunnel body is disposed at or near the wind flow outlet of the rear inner wind tunnel member.