JP5551748B2 - Power generator - Google Patents

Description

  The present invention relates to a power generation apparatus capable of increasing power generation efficiency by increasing the speed of an airflow acting on an impeller by using renewable energy.

  Currently, in order to solve the problem of fossil fuel depletion and the impact on the global environment caused by the burning of fossil fuel, development of technology using clean renewable energy is progressing rapidly.

  Among power generation technologies using renewable energy, wind power generation has a relatively low power generation cost and high energy conversion efficiency, so further technological development is expected in the future.

  In order to make wind power generation a technology that replaces conventional nuclear power generation and thermal power generation, it is essential to develop technology for higher output and stabilization of the power generation device. Therefore, for example, Patent Document 1 proposes a power generation apparatus (hereinafter referred to as a solar tower) called a so-called solar tower or solar chimney.

  FIG. 16 is a reference cross-sectional view showing the basic configuration of such a conventional solar tower P100. The solar tower P100 includes a tubular body 101, a light-transmitting heat collecting portion 102 provided with a predetermined gap between the tubular body 101 and the ground G in a peripheral region of the lower end opening 101a of the tubular body 101, and the tubular body 101. And an impeller 103 disposed around the lower end opening 101 a of the lower end opening 101 a, and is configured to generate electric power by the rotation of the impeller 103. The space inside the cylinder 101 is communicated with the space between the surface of the heat collecting portion 102 and the ground G, and the impeller 103 is disposed in this communicated space.

  The solar tower P100 generates wind power by generating an artificial air flow inside by utilizing a physical phenomenon that the air whose temperature has risen decreases in density and becomes a heat rising wind. The mechanism for generating artificial airflow is as follows.

  First, when sunlight is irradiated onto the heat collection unit 102, the air existing between the heat collection unit 102 and the ground G is heated. Here, since the height of the ceiling of the heat collecting portion 102 is gradually increased toward the central portion, that is, the cylinder 101, the heated air whose temperature has risen becomes a heat rising air, and becomes the lower end of the cylinder 101. Collect in the opening 101a. And the air which reached | attained the lower end opening part 101a of the cylinder 101 becomes a rising airflow by a chimney effect, raises the inside of the cylinder 101, and is discharged | emitted from the upper end opening part 101b of the cylinder 101 to the sky.

  The solar tower P100 is a device that performs wind power generation by rotating the impeller 103 using the energy of the airflow artificially generated based on such a principle. Therefore, in order to make the solar tower P100 a power generation device with as high an output as possible, in order to obtain a strong chimney effect by the cylinder 101 using the temperature difference between the air in the upper and lower layers (near the ground), the heat collecting unit 102 and the ground It is necessary to make the air existing between G as high a temperature as possible and to make the height of the cylinder 101 as high as possible.

  As described above, sufficient solar energy is indispensable for power generation by the solar tower. For this reason, there is a problem that it is difficult to always supply stable power in a situation where solar energy cannot be obtained such as at night. Therefore, Patent Document 1 proposes a solar tower capable of generating electric power by generating an artificial airflow even at night when solar energy cannot be obtained.

  In other words, the solar tower disclosed in Patent Document 1 includes a solar pond that can absorb and store solar energy in the daytime at a location apart from the installation area of the heat collecting unit. Therefore, it is possible to heat the air between the heat collecting part and the ground even at night when solar energy cannot be obtained. Solar ponds store salt water that is designed to absorb and store solar energy during the day. A circulation path for circulating the salt water is provided between the solar pond and the heat collecting part, and the heat exchanger for dissipating the heat of the salt water into the air in the circulation path arranged in the heat collecting part. Is provided. At night when solar energy cannot be obtained, the heat between the heat collecting section and the ground can be heated by radiating the heat of the salt water by the heat exchanger.

WO2008 / 022372 publication

  The amount of power generated by wind power generation is proportional to the cube of the wind speed. Therefore, in order to make the power generation device as high as possible, it is an important point whether the flow velocity of the airflow acting on the impeller of the wind power generation can be increased as much as possible. Moreover, in order to always supply stable electric power, it is an important point whether or not a high-speed air flow can be stably generated.

  The solar tower is a device for generating wind power by artificially generating an air current by utilizing solar energy and a chimney effect of a cylindrical body. The output of the conventional solar tower, that is, the flow velocity of the artificial airflow that can be generated by the conventional solar tower, is almost the same depending on the installation area of the heat collecting part and the height of the cylinder, assuming that the amount of solar energy reaching the ground is constant. It is determined.

Therefore, in order to obtain a higher output power generation device, the conventional solar tower inevitably becomes a huge device, and enormous costs are required for construction and maintenance. For example, the solar tower that is being planned by Environment Mission of Australia has a scale of about 1000 m in height of the cylinder and about 100 km ^{2 in} the installed area of the heat collecting section.

  Furthermore, the solar tower disclosed in Patent Document 1 requires a large site for installing solar ponds that allow sufficient heat storage, in addition to the site necessary for laying the heat collecting section.

  Moreover, even if it is a solar tower provided with the heat storage means as disclosed in Patent Document 1, there is a problem that heat cannot be stored in the solar pond on rainy or cloudy days.

  For the above reasons, there is a problem that the installation location is limited to a vast land where a long annual sunshine time can be secured, that is, a desert area, etc., in order to fully exhibit the function of the conventional solar tower.

  Therefore, the present invention increases the power generation efficiency by increasing the speed of the airflow acting on the impeller by using renewable energy, and can stably supply power even for a relatively small structure. An object is to provide a solar tower type power generator.

The power generation device according to the first aspect of the present invention is a light-transmitting device that is laid and provided with a space between a standing upwardly-expanding cylindrical body and a ground in a peripheral region of a lower end opening of the cylindrical body. A heat collecting portion including a body, an air flow passage formed by communicating a space between the ground and the transparent body, and an inner space of the cylindrical body, an impeller provided in the air flow passage, and an impeller A low-pressure region is formed above the upper end opening of the cylindrical body by a generator that generates power in conjunction with rotation and a natural airflow that flows substantially horizontally, and the temperature of the air existing between the ground and the transparent body is increased. Low pressure forming means for accelerating the speed at which the artificial airflow generated in the cylinder rises, and the low pressure forming means has a vortex facing the natural airflow direction at the upper end of the cylinder A plate-like or prismatic vortex generator that forms a low-pressure region by generating an air flow is provided.

  Moreover, invention of Claim 2 is the electric power generating apparatus of Claim 1, Comprising: A heat collecting part is provided with the thermal radiation part arrange | positioned under the translucent body.

Moreover, invention of Claim 3 is the electric power generating apparatus of Claim 2, Comprising : A thermal radiation part is provided with the solar cell panel arrange | positioned by making the flat surface into the up-down direction .

The invention according to claim 4 is the power generation device according to any one of claims 1 to 3, wherein the low-pressure forming means is an axis of the cylinder disposed in the vicinity of the upper end opening of the cylinder. a coaxial independent rotation axis, and the vortex generation body which is disposed between the upper edge of the rotatably provided continuously to the cylindrical body to the rotary shaft, Ru comprising a.

Further, the invention according to claim 5 is the power generation device according to any one of claims 1 to 3, wherein the vortex generator of the low pressure forming means has an uneven upper end edge of the cylinder. The convex-concave part formed by is provided.

Further, the invention according to claim 6 is the power generation device according to claim 5, wherein the low-pressure forming means includes a pair of vertical plate-like guide bodies disposed facing each other so as to sandwich the convex and concave portions. vertical plate-like guide bodies have a guide portion that is opposed disposed in expanded shape substantially along a natural gas stream that flows horizontally top opening of the cylindrical body, a pair of vertical plates shaped guide body is cylindrical The cylinder has an independent rotation axis coaxial with the axis of the cylinder disposed in the vicinity of the upper end opening of the body, is rotatably connected to the rotation axis, and is rotatably disposed around the central axis of the cylinder.

  The invention according to claim 7 is the power generation device according to claim 6, wherein the pair of vertical plate-like guide bodies are bent naturally by bending the edge portion on the expansion side of the guide portion outward. A vortex generator is formed to face the airflow.

The invention according to claim 8 is the power generation device according to claim 4, wherein the vortex generator of the low pressure forming means is a rectangular plate and is located between the upper end edge and the upper end edge of the cylindrical body. It was suspended at an interval and connected to one end of a horizontal rod supported at the upper end of the rotating shaft and extending substantially horizontally.

The invention according to claim 9 is the power generation device according to claim 4, wherein the vortex generating body of the low-pressure forming means is a prism and is spaced above the upper end edge of the cylindrical body. And connected to one end of a horizontal rod that is supported at the upper end of the rotating shaft and extends substantially horizontally.

Further, when the invention according to claim 1 0, a power generator according to claim 9, prismatic vortex generating body, the height was h, and front and rear width of the flow direction of the natural gas stream and w In this case, w / h = 0.5 to 0.7.

The invention of claim 1 1, a power generating apparatus according to any one of claims 8-1 0, comprises an end plate at both ends of the vortex generation body.

The invention according to claim 1 2, a power generator according to claim 4, the vortex generation body of the low pressure forming means, between the upper edge above the upper edge of the triangular plate in the tubular body It was obliquely provided with an interval, and was connected to one end of a horizontal ridge supported at the upper end of the rotating shaft and extending substantially horizontally.

Further, an invention according to claim 1 3, claim 4, 8-1 a power generator according to any one of 2, vane stabilizing means low pressure forming means having a flat wind receiving body The low-pressure forming means is arranged so as to face a natural airflow flowing substantially horizontally above the upper end opening of the cylinder.

The invention according to claim 1 4, a power generator according to claim 4, the vortex generation body of the low pressure forming means is constituted by a vertical-axis windmill equipped with a vertical elongated plurality of blades It is arrange | positioned above the upper end edge of a cylinder.

Pair Further, an invention according to claim 1 5, a power generator according to claim 14, the low pressure forming means which is opposed disposed so as to sandwich the rotation space of the plurality of blades having a vertical axis windmill The pair of vertical plate-shaped guide bodies has a guide portion that is arranged in a face-to-face manner along a natural airflow that flows substantially horizontally above the upper end opening of the cylindrical body. The pair of vertical plate-shaped guide bodies are rotatably arranged around the rotation axis independently of the vertical axis windmill.

The invention according to claim 16 is the power generation device according to claim 15, wherein the pair of vertical plate-like guide bodies bends the expansion side end edge portion of the guide portion outward. And a vortex generator formed to face the natural airflow.

Further, an invention according to claim 17, a power generator according to claim 1 4 or 1 5, is continuously provided to the rotation shaft of the vertical axis windmill, housed disposed inside right above the cylindrical body A stirrer is provided.

The invention according to claim 18 is the power generation device according to any one of claims 1 to 17 , wherein the impeller has a cylindrical body at the throat portion where the horizontal cross-sectional area of the air flow passage is minimized. It is rotatably arranged around the central axis.

The invention according to claim 19 is the power generation device according to claim 2 , wherein the heat dissipating part is configured to dissipate heat derived from exhaust heat.

The invention according to claim 20 is the power generation device according to claim 2 , wherein the heat dissipating part is configured to dissipate heat derived from geothermal heat.

  According to the present invention, since the artificial airflow acting on the impeller can be accelerated using renewable energy to increase the power generation efficiency, power can be stably supplied even for a relatively small structure. It can be a solar tower type power generator that can be used.

The external appearance perspective view of the electric power generating apparatus by this invention. The partial cross section figure of the electric power generating apparatus by this invention. Explanatory drawing of the electric power generating apparatus by this invention comprised so that exhaust heat could be utilized. Explanatory drawing of the electric power generating apparatus by this invention comprised so that geothermal could be utilized. The external appearance perspective view of another embodiment of the electric power generating apparatus by this invention. The partial cross section figure of another embodiment of the electric power generating apparatus by this invention. Explanatory drawing which showed the structural example of the low voltage | pressure formation means. Explanatory drawing which showed the structural example of the low voltage | pressure formation means. Explanatory drawing which showed the structural example of the low voltage | pressure formation means. Explanatory drawing which showed the structural example of the low voltage | pressure formation means provided with a vertical axis type windmill. Explanatory drawing which showed the structural example of the low voltage | pressure formation means provided with a vertical axis type windmill. Explanatory drawing which showed the structural example of the low voltage | pressure formation means provided with a vertical axis type windmill. Explanatory drawing which showed the structural example of the low voltage | pressure formation means provided with a vertical axis type windmill. Explanatory drawing which showed the structural example of the low voltage | pressure formation means. Explanatory drawing which showed the structural example of the low voltage | pressure formation means. Reference sectional view of a conventional solar tower.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  A solar tower type power generator P according to the present invention is shown in FIGS. FIG. 1 is an external perspective view of the power generation device P, and FIG. 2 is a partial cross-sectional view of the power generation device P.

  The solar tower type power generation device P according to the present invention is laid out with a gap between the vertically expanded cylindrical body 1 and the ground G in the peripheral region of the lower end opening 1a of the cylindrical body 1. A heat collecting portion Hc including the transparent body 2, an air flow passage 3 formed by communicating a space between the ground G in the peripheral region and the transparent body 2, and an internal space of the cylindrical body 1, and an air flow An impeller 4 provided on the road 3 and a generator 5 that generates electric power in conjunction with the rotation of the impeller 4 are provided.

  The translucent body 2 is laid without any gaps on a plurality of columns 6 standing on the ground G in the peripheral area of the lower end opening 1a of the cylindrical body 1, and a predetermined gap is provided between the translucent body 2 and the ground G. An interval is provided. The height of the translucent body 2 is configured to gradually increase toward the central cylindrical body 1. The lower end opening 1a of the cylindrical body 1 is expanded in a trumpet shape downward and is smoothly continuous with the central portion of the light transmitting body 2.

  The heat collecting part Hc is configured to be able to heat the air existing between the translucent body 2 and the ground G using solar energy that is renewable energy, exhaust heat or geothermal heat described later. The translucent body 2 is made of a translucent material that can transmit sunlight, such as glass and plastic, and the heat collecting portion Hc serves as a greenhouse to remove the air existing between the translucent body 2 and the ground G. It can be heated efficiently by solar energy. In this case, the solar energy that can be used increases as the installation area of the translucent body 2 increases, and the power generation amount of the power generation device P increases. In addition, although the translucent body 2 is laid in the substantially circular shape in FIG. 1, you may design suitably according to the condition etc. of the land where the power generation apparatus P is installed.

  The cylinder 1 is supported by a cylinder support 7 provided at the lower part of the lower end opening 1a. The cylindrical body support portion 7 is formed of a structure that can sufficiently support the weight of the cylindrical body 1, and the space between the translucent body 2 and the ground G and the internal space of the cylindrical body 1 communicate with each other. It is configured. By forming the air flow passage 3 by communicating the space between the light transmitting body 2 and the ground G and the internal space of the cylindrical body 1, the air below the light transmitting body 2 heated by solar energy is transmitted through the light transmitting body. 2 rises along the lower surface of 2 and gathers in the center, rises inside the cylinder 1 by the chimney effect, and is discharged from the upper end opening 1b to the sky. Thus, in the air flow passage 3, the artificial airflow Fa flowing from the lower side of the peripheral edge 2a of the transparent body 2 toward the upper end opening 1b of the cylindrical body 1 is generated.

  It is preferable that the cylindrical body support portion 7 has a shape that does not hinder the flow of the artificial airflow Fa as much as possible. For example, if the cylindrical body support portion 7 is configured by a plurality of columns and the cross-sectional shape of each cylindrical body support portion 7 configured by the columns is a streamlined shape with respect to the flow of the artificial airflow Fa, The flow of the artificial airflow Fa from the space between the light body 2 and the ground G toward the internal space of the cylinder 1 can be made smooth.

  The power generation device P according to the present invention generates power by rotating the impeller 4 using the wind energy of the generated artificial airflow Fa. The impeller 4 can be installed in an arbitrary place as long as the airflow passage 3 through which the artificial airflow Fa passes, and a plurality of impellers 4 may be installed. Since the flow velocity of the artificial airflow Fa increases as the distance from the central portion increases, the impeller 4 is preferably provided at a position as close as possible to the lower end opening 1 a of the cylindrical body 1.

  The cylindrical body 1 has a narrow throat portion 1c that becomes a constriction in the lower end opening portion 1a, and is formed in an upward expansion type (diffuser type) that expands upward from the throat portion 1c. That is, the horizontal cross-sectional area of the internal space of the cylindrical body 1 is the smallest in the throat portion 1c, and gradually increases upward from the throat portion 1c. Thus, by making the shape of the cylindrical body 1 an upwardly expanding type, the diffuser effect is manifested, and the throat portion 1c in which the horizontal sectional area of the internal space is minimized becomes a low pressure. As a result, the flow velocity of the artificial airflow Fa flowing through the throat portion 1c is greatly increased.

  Therefore, the amount of power generation can be effectively increased by disposing the rotatable impeller 4 around the central axis of the cylinder 1 in the throat portion 1c. At that time, a predetermined clearance is provided between the blade tip of the impeller 4 and the inner wall of the throat portion 1c, and the rotor diameter of the impeller 4 is made as large as possible according to the size of the transverse section of the throat portion 1c. Is good.

  The spread angle θ of the cylindrical body 1 is preferably about 4 to 10 degrees. In the present specification, the divergence angle θ refers to an inclination angle of the inner peripheral surface of the cylinder 1 with respect to the vertical direction. By setting the divergence angle θ to about 4 to 10 degrees, the flow velocity of the artificial airflow Fa in the throat portion 1c of the cylindrical body 1 can be sufficiently increased. In the case of a non-viscous fluid, the greater the divergence angle θ, the greater the pressure recovery rate. Therefore, the throat portion 1c has a lower pressure and the artificial airflow Fa flowing through the throat portion 1c is further accelerated. However, in the case of air, which is a viscous fluid, boundary layer separation is likely to occur when the spread angle θ exceeds 10 degrees, so that the effect of increasing the artificial airflow Fa in the throat portion 1c cannot be sufficiently obtained. On the other hand, if the divergence angle is less than 4 degrees, the loss due to friction generated between the inner wall of the cylindrical body 1 and the artificial airflow Fa becomes dominant, so that the effect of increasing the artificial airflow Fa in the throat portion 1c is sufficient. I can't get it.

  Note that an impeller 4 is actually provided in the air flow passage 3, and the impeller 4 is considered to be a resistor against the flow of the artificial airflow Fa. In addition, there may be a thing that can be a resistor against the flow of the artificial airflow Fa, such as a low-pressure forming means A described later. Accordingly, since the optimum value of the spread angle θ varies depending on the design of the power generation device P, it is preferable to obtain the optimum value of the spread angle θ according to the design.

  As described above, the power generation device P according to the present invention has the cylindrical body 1 as an upwardly-expandable type, and even if the structure is relatively small compared to the conventional solar tower, the artificial airflow Fa generated inside increases, Power generation efficiency can be increased and power can be supplied stably.

  In the power generation device P of the present invention, the artificial air current Fa is increased and the power generation efficiency is increased as the temperature of the air existing between the transparent body 2 and the ground G is increased. Therefore, as shown in FIGS. 3 and 4, a heat dissipating part Hr is disposed below the light transmitting body 2 of the heat collecting part Hc, and air existing between the light transmitting body 2 and the ground G is removed by the heat dissipating part Hr. You may comprise so that a heat rising wind can be generated by heating. FIG. 3 is an explanatory view showing a power generation device P configured to generate a heat rising wind using various exhaust heat. FIG. 4 is an explanatory view showing a power generator P configured to generate a heat rising wind using geothermal heat.

  The power generator P shown in FIG. 3 collects exhaust heat exhausted from the factory E1, office building E2, home E3, etc. (hereinafter referred to as the exhaust heat section E) in the heat collection section Hc, and generates heat derived from the exhaust heat. Is configured to be able to radiate heat from the heat radiating portion Hr, which is a so-called cogeneration system configuration. The power generation device P includes a heat radiating portion Hr disposed below the light transmitting body 2 and a circulation path 15 for circulating the heat medium m between the heat exhausting portion E and the heat radiating portion Hr. Yes. By providing a heat sink in the circulation path 15 in the heat radiation part Hr, or by diverging the circulation path 15 in the heat radiation part Hr into a plurality of parts and reducing its diameter, it is easy to radiate the heat of the heat medium m in the heat radiation part Hr. It is good to have a configuration. According to this power generation device P, the exhaust heat exhausted from the exhaust heat section E is collected by the heat collection section Hc through the heat medium m, and is released from the heat radiation section Hr to transmit the light transmitting body 2 and the ground G. The air existing between the two can be heated. In the figure, reference numeral 16 indicates the flow of the high-temperature heat medium m, and reference numeral 17 indicates the flow of the low-temperature heat medium m.

  3 is not limited to the configuration in which the air existing between the transparent body 2 and the ground G is indirectly heated by the heat medium m. For example, a duct that leads from the exhaust heat section E to the heat collection section Hc may be provided so that the exhaust heat generated in the exhaust heat section E can be released from the heat radiation section Hr of the heat collection section Hc through the duct. In that case, an air supply path that flows in one direction from the heat exhausting part E to the heat collecting part Hc is formed inside the duct using a blower fan or the like, and the translucent body 2 is opened from the opening of the duct provided in the heat radiating part Hr. What is necessary is just to comprise so that waste heat can be discharge | released directly below.

  The power generator P shown in FIG. 4 is configured to collect the heat of the geothermal water 81 of the geothermal reservoir 80 in the heat collecting part Hc and to radiate the heat derived from the geothermal heat from the heat radiating part Hr. This power generation device P includes a steam well 82 that extracts the geothermal water 81 of the geothermal reservoir 80, a steam / water separator 83 that separates the extracted geothermal water 81 into steam and hot water, and the steam to the heat radiating portion Hr. And a hot water supply pipe 86 that guides the hot water to the heat radiating part Hr and returns the hot water cooled by the heat radiating part Hr to the reducing well 85.

  The steam supply pipe 84 is formed with a plurality of steam discharge holes 87 in the heat radiating portion Hr, and the steam is discharged from the steam discharge holes 87 below the light transmitting body 2. It is preferable that a heat sink is provided in the hot water supply pipe 86 in the heat radiating portion Hr so that the heat of the hot water is easily radiated by the heat radiating portion Hr. Moreover, it is good also as a structure which is easy to thermally radiate the heat | fever of hot water with the thermal radiation part Hr by branching the hot-water supply piping 86 in the thermal radiation part Hr into multiple, and making the diameter thin.

  It should be noted that the power generation device P configured to heat the air existing between the translucent body 2 and the ground G using the exhaust heat or the heat of the geothermal water 81 in this way can be used even in an area where the annual sunshine hours are small. A high power generation amount can be ensured, and the material used for the translucent body 2 is not necessarily a translucent material.

  As shown in FIGS. 5 and 6, a solar cell panel 8 is disposed below the installed translucent body 2 with a predetermined gap between the ground G and the translucent body 2. Also good. In this case, the solar cell panel 8 functions as a generator and also functions as a heat radiating part Hr. According to the power generation device P including the solar cell panel 8, the air is warmed by using the thermal energy released without contributing to the power generation by the solar cell panel 8, and the generated artificial airflow Fa is accelerated to impeller. Wind power generation by 4 can be performed.

  At present, the energy absorption rate (power generation efficiency) of a general solar panel is about 15%, and the remaining 85% is discarded as heat. According to the power generation device P including the solar cell panel 8, it is possible to generate the heat rising wind by using 85% of the energy released as heat. That is, it can be said that the power generation device P including the solar cell panel 8 is a so-called highly efficient cogeneration system.

  Furthermore, as shown in FIGS. 5 and 6, low pressure forming means A may be provided in the upper end opening 1 b of the cylinder 1. The low pressure forming means A uses a natural airflow Fb, which is a renewable energy that flows substantially horizontally above the upper end opening 1b of the cylindrical body 1, and has a strong vorticity at the upper end opening 1b, that is, the outlet of the artificial airflow Fa. Is formed so that a low pressure region can be formed. By forming a low pressure region at the outlet of the artificial airflow Fa, the ascending airflow generated in the internal space of the cylindrical body 1 becomes stronger and the flow velocity of the artificial airflow Fa is increased. Can be increased. Further, since the low pressure forming means A includes the wind vane stabilizing means 9 having a flat wind receiver, it always maintains a state facing the natural air flow Fb regardless of the flow direction of the natural air flow Fb. A low pressure region can be stably formed at the outlet of the artificial airflow Fa.

  As the natural air flow Fb, for example, a low-rise jet that is constantly generated in the sky about 50 to 200 m from the ground G can be used. Low-rise jets occur particularly frequently at night, so they are also called night jets or nocturnal jets. By providing the low pressure forming means A at the upper end opening 1b of the cylindrical body 1, the power generator P of the present invention can also use wind energy by such a low-rise jet for power generation.

  According to the power generation device P including the low pressure forming means A, it is possible to stably perform wind power generation by the impeller 4 without being greatly affected by the time zone and the weather. In the daytime, the artificial airflow Fa generated using solar energy can be accelerated by the energy of the natural airflow Fb, and the amount of wind power generation can be increased. Since the solar energy cannot be obtained at night, the chimney effect is weakened. However, since the artificial airflow Fa can be sucked up and accelerated by the low pressure forming means A using the energy of the natural airflow Fb such as a low-rise jet, sufficient power generation is possible. The amount can be secured. In addition, even when it is not possible to obtain sufficient solar energy even in the daytime due to bad weather, the artificial airflow Fa can be accelerated using the energy of the natural airflow Fb such as a low-rise jet as in the nighttime. Sufficient power generation can be secured.

  As described above, according to the power generation device P of the present invention, even if the structure is relatively small compared to the conventional solar tower, the power can be generated using renewable energy without being greatly affected by the time zone and the weather. Can be stably supplied.

  The low pressure forming means A may be a structure that can generate a vortex by the natural airflow Fb at the upper end opening 1b of the cylindrical body 1, that is, the outlet of the artificial airflow Fa, by using a natural airflow Fb such as a low-rise jet. A specific configuration of the low-pressure forming means A capable of generating a vortex with a more preferable strong vorticity will be described in detail below.

[Low-pressure forming means including a rectangular plate-like vortex generator]
FIG. 7 is a diagram showing a configuration example of the low pressure forming means A. FIG. 7A is a perspective view of the low-pressure forming means A1 according to this configuration example, and FIG. 7B is a partial cross-sectional view of the low-pressure forming means A1.

  The low-pressure forming means A1 is suspended vertically around the central axis of the cylindrical body 1 along the central axis of the cylindrical body 1 via the support 10 that is installed in the upper end opening 1b of the cylindrical body 1. The rotating shaft 11, a horizontal rod 12 whose middle part is supported by the upper end of the rotating shaft 11 and extending substantially horizontally, a rectangular plate-like vortex generator C 1 provided at one end of the horizontal rod 12, and the horizontal rod 12 And a flat wind receiving body 13 erected on the other end. One end of the horizontal rod 12 is fixed to the approximate center of the inner surface C1a of the vortex generator C1, and the horizontal rod 12 and the inner surface C1a are vertical. The rectangular plate-shaped vortex generator C1 is positioned substantially above the upper end edge 1d of the cylinder 1 in a suspended state, and between the lower edge C1b of the vortex generator C1 and the upper end edge 1d of the cylinder 1 Is provided with a predetermined interval.

  The natural air flow Fb hitting the outer surface C1c of the rectangular plate-like vortex generator C1 bypasses the lower edge C1b and the upper edge C1d of the vortex generator C1 and wraps around the inner surface C1a of the vortex generator C1 to generate vortex generation. A Karman vortex street V1 having a strong vorticity is generated in the downstream direction of the body C1. The region where the Karman vortex street V1 is generated has a lower pressure than the surrounding atmospheric pressure, and a strong low pressure region L1 is formed.

  Further, in the low pressure forming means A1 of this configuration example, the wind vane stabilizing means 9 is configured by the rotating shaft 11, the horizontal rod 12, and the flat wind receiver 13. Since the wind receiver 13 is erected on the horizontal ridge 12 with both surfaces thereof being perpendicular to the extending direction of the horizontal ridge 12, the outer surface C1c of the vortex generator C1 is flow direction of the natural air flow Fb. Can always be kept facing each other. Therefore, according to the low pressure forming means A1 of the present configuration example, a stable strong low pressure region L1 can be formed in the upper end opening 1b of the cylindrical body 1 regardless of the direction of the natural air flow Fb.

  The low pressure region L1 is preferably formed so as to cover the widest possible range of the opening area of the upper end opening 1b. Therefore, the horizontal length of the rectangular plate-like vortex generator C1 is preferably equal to or larger than the diameter of the upper end opening 1b of the cylindrical body 1. Further, the length of the horizontal rod 12 from the contact point with the upper end of the rotating shaft 11 to the contact point with the inner surface C1a is preferably equal to or larger than the radius of the upper end opening 1b of the cylindrical body 1. In order to form a sufficiently low pressure region L1 while accommodating the low pressure forming means A1 as compactly as possible, the horizontal length of the rectangular plate-like vortex generator C1 is set to the upper end opening 1b of the cylindrical body 1b. It is preferable that the length of the horizontal rod 12 from the contact point with the upper end of the rotating shaft 11 to the contact point with the inner surface C1a is equal to the radius of the upper end opening 1b of the cylindrical body 1 as well as the diameter.

  Furthermore, it is preferable that the rectangular plate-like end plates 14 are opposed to each other at substantially right angles at both ends of the rectangular plate-like vortex generator C1. Since the end plates 14 and 14 function as rectifying plates that regulate the flow of the natural airflow Fb, it is possible to promote the two-dimensional generation of the Karman vortex street V1 arranged in the downstream direction of the vortex generator C1.

[Low pressure forming means with prismatic vortex generator]
FIG. 8 is a view showing another configuration example of the low pressure forming means A. FIG. 8A is a perspective view of the low-pressure forming unit A2 according to this configuration example, and FIG. 8B is a partial cross-sectional view of the low-pressure forming unit A2.

  The low-pressure forming means A2 is suspended vertically around the central axis of the cylindrical body 1 along the central axis of the cylindrical body 1 via the support 20 that is installed in the upper end opening 1b of the cylindrical body 1. The rotating shaft 21, the horizontal rod 22 whose middle part is supported by the upper end of the rotating shaft 21 and extending substantially horizontally, the prismatic vortex generator C 2 provided at one end of the horizontal rod 22, and the horizontal rod 22 And a flat plate-shaped wind receiver 23 standing at the end. One end of the horizontal rod 22 is fixed to the approximate center of the inner surface C2a of the vortex generator C2, and the horizontal rod 22 and the inner surface C2a are perpendicular to each other. The prismatic vortex generator C2 is placed sideways with the inner surface C2a positioned substantially above the upper end edge 1d of the cylinder 1, and the lower surface C2b of the vortex generator C2 and the upper end edge 1d of the cylinder 1 are arranged. A predetermined interval is provided between them.

  The natural air flow Fb hitting the outer surface C2c of the prismatic vortex generator C2 bypasses the lower surface C2b and upper surface C2d of the vortex generator C2 and wraps around the inner surface C2a side of the vortex generator C2 to form the vortex generator C2. A Karman vortex street V2 having a strong vorticity in the downstream direction is generated. The region where the Karman vortex street V2 is generated has a lower pressure than the surrounding atmospheric pressure, and a strong low pressure region L2 is formed.

  Further, in the low pressure forming means A2 of this configuration example, the wind vane stabilizing means 9 is configured by the rotating shaft 21, the horizontal rod 22 and the flat wind receiver 23. Since the wind receiving body 23 is erected on the horizontal ridge 22 with its both surfaces oriented in a direction perpendicular to the extending direction of the horizontal ridge 22, the direction of the flow of the natural air flow Fb on the outer surface C2c of the vortex generator C2 Can always be kept facing each other. Therefore, according to the low pressure forming means A2 of the present configuration example, it is possible to form a stable strong low pressure region L2 in the upper end opening 1b of the cylindrical body 1 regardless of the direction of the natural air flow Fb.

  The low pressure region L2 is preferably formed so as to cover the widest possible range of the opening area of the upper end opening 1b. Therefore, the length of the prismatic vortex generator C2 in the longitudinal direction is preferably equal to or larger than the diameter of the upper end opening 1b of the cylindrical body 1. In addition, the length of the horizontal rod 22 from the contact point with the upper end of the rotating shaft 21 to the contact point with the inner surface C2a is preferably equal to or greater than the radius of the upper end opening 1b of the cylinder 1. In order to form a sufficiently low pressure region L2 while accommodating the low pressure forming means A2 as compactly as possible, the length of the prismatic vortex generator C2 in the longitudinal direction is set to the diameter of the upper end opening 1b of the cylindrical body 1. It is preferable that the length of the horizontal rod 22 from the contact point with the upper end of the rotating shaft 21 to the contact point with the inner surface C2a is equal to the radius of the upper end opening 1b of the cylindrical body 1.

  Furthermore, when the height of the prismatic vortex generator C2 is h and the longitudinal width in the flow direction of the natural air flow Fb is w, w / h = 0.5 to 0 with w / h = 0.6 as a peak. A low back pressure coefficient (about 1.7 to 2.0 times the back pressure coefficient as compared with the rectangular plate-like vortex generator C1) is shown in the range of about 0.7. That is, by setting the shape of the prismatic vortex generator C2 to about w / h = 0.5 to 0.7, and more preferably about w / h = 0.6, downstream of the natural airflow Fb of the vortex generator C2. A Karman vortex street V2 having a stronger vorticity can be generated on the side, and a strong low pressure region L2 can be formed by the upper end opening 1b of the cylindrical body 1.

  Further, it is preferable to provide rectangular plate-like end plates 24, 24 facing each other at both ends of the prismatic vortex generator C2. Since the end plates 24 and 24 function as rectifying plates that adjust the flow of the natural airflow Fb, it is possible to promote two-dimensional generation of the Karman vortex street V2 arranged in the downstream direction of the vortex generator C2.

[Low-pressure forming means provided with an inclined triangular plate-like vortex generator]
FIG. 9 is a view showing still another configuration example of the low pressure forming means A. In FIG. FIG. 9A is a perspective view of the low-pressure forming means A3 according to this configuration example, and FIG. 9B is a partial cross-sectional view of the low-pressure forming means A3.

  The low-pressure forming means A3 is provided so as to be rotatable about the central axis along the central axis of the cylindrical body 1 through the support 30 and the supporting body 30 laid over the upper end opening 1b of the cylindrical body 1. The rotating shaft 31, a horizontal rod 32 whose middle part is supported by the upper end of the rotating shaft 31 and extending substantially horizontally, a triangular plate-like vortex generator C 3 obliquely installed at one end of the horizontal rod 32, and the horizontal rod 32 And a flat wind receiving body 33 erected on the other end. One end of the horizontal rod 32 is fixed to the lower surface C3a of the vortex generator C3, and the vortex generator C3 is obliquely installed with the apex angle C3p facing downward with an angle of about 10 to 40 degrees with respect to the horizontal. ing. A predetermined interval is provided between the apex angle C3p of the vortex generator C3 and the upper end edge 1d of the cylindrical body 1, and the apex angle C3p is positioned substantially above the upper end edge 1d.

  The natural airflow Fb that hits the upper surface C3b of the triangular plate-like vortex generator C3 bypasses both side edges C3c and C3d of the vortex generator C3 and circulates toward the lower surface C3a. Column V3 is generated. The region where the vortex street V3 is generated has a lower pressure than the surrounding atmospheric pressure, and a strong low pressure region L3 is formed.

  Further, in the low pressure forming means A3 of this configuration example, the wind vane stabilizing means 9 is configured by the rotating shaft 31, the horizontal rod 32, and the flat wind receiver 33. Since the wind receiver 33 is erected on the horizontal rod 32 with its both surfaces oriented in a direction perpendicular to the extending direction of the horizontal rod 32, the upper surface C3b of the vortex generator C3 is directed to the flow direction of the natural air flow Fb. Can always be kept facing each other. At this time, if the vortex generator C3 is obliquely installed with the apex angle C3p directed downward and at an angle of about 10 to 40 degrees with respect to the horizontal, the cylinder is formed regardless of the flow direction of the natural air flow Fb. A stable strong low pressure region L3 can be formed in the upper end opening 1b of the body 1.

  The rear end edge C3e of the vortex generator C3 is preferably extended until it is positioned substantially above the upper end edge 1d of the cylindrical body 1. By setting it as such a structure, since the low voltage | pressure area | region L3 formed with the natural airflow Fb will cover most of the area of the upper end opening part 1b of the cylinder 1, the artificial airflow Fa can be accelerated more effectively. Can be made.

[Low-pressure forming means including a vertical axis type windmill and an expanded guide body]
10 and 11 are diagrams showing still another configuration example of the low-pressure forming means A. FIG. FIG. 10A is a perspective view of the low pressure forming means A4 according to this configuration example, FIG. 10B is a plan view of the low pressure forming means A4, and FIG. 11 is a partial cross-sectional view of the low pressure forming means A4. is there.

  The low pressure forming means A4 includes a vertical axis type windmill 40 rotatably disposed above the upper end opening 1b of the cylinder 1. The vertical axis type windmill 40 is installed on the upper end opening 1b of the cylindrical body 1 and has a shape that extends radially from a position on the central axis of the cylindrical body 1, and a vertical axis type windmill 40 on the central axis of the supporting body 43. A first bearing 44 provided at a position, and supported by the support body 43 via the first bearing 44 and extend in and out of the upper end opening 1b along the central axis of the cylindrical body 1 A rotary shaft 41 that is vertically rotatable around, a first arm 45 that extends radially from the upper side of the upper end opening 1 b of the rotary shaft 41 in a substantially horizontal direction, and a tip of the first arm 45. And a vertically long blade 46 provided vertically. Here, by providing a plurality of support bodies 43 including the first bearings 44 at predetermined intervals in the upper end opening 1b of the cylindrical body 1, the rotation shaft 41 is stably supported by the plurality of first bearings 44. can do. The shape of the blade 46 is not particularly limited, and either a lift type or a drag type may be used.

  The vertical axis type windmill 40 is freely rotated by the action of the natural airflow Fb. Therefore, when the blade 46 is positioned upstream of the natural airflow Fb by rotation, a vortex is generated by the natural airflow Fb behind the natural airflow Fb, that is, in the upper end opening 1b of the cylindrical body 1, and the upper end A low pressure region is formed in the opening 1b. As a result, the artificial airflow Fa generated inside the cylinder 1 is accelerated. The number of blades 46 is not limited, but the lower the number of blades 46, the more stable the low pressure region formed in the upper end opening 1b. In the case where a plurality of blades 46 are provided, it is preferable to arrange the plurality of blades 46 so that the center of gravity comes on the rotation shaft 41 in consideration of the balance during rotation.

  The vertical axis type windmill 40 may be provided with a generator capable of generating power in conjunction with the rotation of the rotating shaft 41. In this case, the smaller the number of blades 46, the faster the rotation speed of the vertical axis type windmill 40 and the greater the amount of power generation.

  The low-pressure forming means A4 may be provided with a pair of vertical plate-shaped guide bodies 50, 50 that are substantially L-shaped in plan view and cover the vertical axis wind turbine 40 from the side. The pair of guide bodies 50, 50 are provided via a second bearing 51 provided rotatably around the rotation shaft 41 and a support frame 52 extending radially from the second bearing 51 in a substantially horizontal direction. It is supported and is arranged in a face-to-face state so as to sandwich the rotation space of the plurality of blades 46 included in the vertical axis wind turbine 40. The first bearing 44 and the second bearing 51 are each configured to be independently rotatable about the rotation shaft 41. Therefore, independent of the rotation of the vertical axis wind turbine 40 connected via the rotation shaft 41, the pair of guide bodies 50, 50 can freely rotate around the rotation shaft 41, that is, around the central axis of the cylindrical body 1. It is possible to rotate.

  The pair of guide bodies 50, 50 includes guide portions 50a, 50a that are arranged in a face-to-face manner along a natural airflow Fb that flows substantially horizontally above the upper end opening 1b of the cylindrical body 1, and guide portions 50a, There are vortex generators 50b and 50b formed so as to be bent at a substantially right angle outwardly (an edge on the downstream side of the natural air flow Fb) 50a and facing the natural air flow Fb. doing. In other words, the distance between the guide portions 50a and 50a disposed facing each other is configured to gradually increase toward the vortex generating portions 50b and 50b.

  Due to the front edge portions 50c and 50c of the pair of guide bodies 50 and 50, the natural air flow Fb causes an internal flow Fb1 that passes between the pair of guide bodies 50 and 50 and an outside that passes outside the pair of guide bodies 50 and 50. The flow is divided into Fb2. Here, by making the pair of guide bodies 50, 50 expand toward the downstream direction of the natural airflow Fb, a diffuser effect is exhibited, and the pressure in the upstream region where the distance between the pair of guide bodies 50, 50 is small. Decreases and the flow velocity of the internal flow Fb1 increases. Therefore, the rotational speed of the blade 46 can be increased by providing a pair of guide bodies 50, 50 that expand in the downstream direction of the natural airflow Fb so as to cover the side of the vertical axis windmill 40. it can. At this time, in order to further increase the rotational speed of the blade 46, the distance between the pair of guide bodies 50, 50 in the rotational region of the blade 46 is made as small as possible, and the downstream direction of the natural airflow Fb from the rotational region of the blade 46. It is better to make it gradually expand toward the front. Further, the longer the length of the guide portions 50a, 50a, the higher the diffuser effect, and the rotational speed of the blade 46 can be further increased. When the rotational speed of the blade 46 is increased, the low pressure region formed in the upper end opening 1b of the cylindrical body 1 is further stabilized by the natural airflow Fb acting on the blade 46. Moreover, when the generator which can generate electric power in connection with rotation of the rotating shaft 41 is provided, the electric power generation amount increases.

  The boundary layer of the internal flow Fb1 is separated at the bent portions 50d and 50d of the guide bodies 50 and 50, and a vortex is generated on the downstream side. Similarly, the boundary layer of the external flow Fb2 is separated at the side edges 50e and 50e of the vortex generators 50b and 50b, and a vortex is generated downstream. At this time, the respective vortices generated by the internal flow Fb1 and the external flow Fb2 are alternately generated so as to be wound downstream of the vortex generating units 50b and 50b. That is, a Karman vortex train V4 having a strong vorticity is generated in the downstream direction of the vortex generators 50b and 50b. The region where the Karman vortex street V4 is generated has a lower pressure than the surrounding atmospheric pressure, and a strong low pressure region L4 is formed. Since the internal flow Fb1 further increases due to the formation of the low pressure region L4, the rotational speed of the blade 46 is further increased.

  In the low pressure forming means A4 according to this configuration example, the rotating shaft 41, the second bearing 51 provided to be rotatable around the rotating shaft 41, and the second bearing 51 extending radially in a substantially horizontal direction. The wind vane stabilizing means 9 is configured by the support frame 52 and the guide body 50 fixed and supported at the tip of the support frame 52. That is, by the configuration of the wind vane stabilizing means 9, the guide bodies 50, 50 are kept in a state in which the front edge portions 50c, 50c face the upwind side of the natural airflow Fb and the vortex generating portions 50b, 50b face the downwind side of the natural airflow Fb. be able to. Therefore, according to the low pressure forming means A4 according to this configuration example, the guide portions 50a and 50a are substantially parallel to the flow direction of the natural air flow Fb regardless of the flow direction of the natural air flow Fb, and the vortex generation portion. Since the guide bodies 50 and 50 can be kept in a state of facing the natural airflow Fb on the leeward side, the guide bodies 50 and 50b can be kept downstream of the vortex generators 50b and 50b, that is, on the widened side of the guide bodies 50 and 50. A Karman vortex street V4 having a strong vorticity can be stably generated.

  In the configuration of the low pressure forming means A4, the guide bodies 50 and 50, and the support body 43 for rotatably supporting the guide bodies 50 and 50, the first bearing 44, the rotating shaft 41, and the second bearing 51 are provided. Even with the configuration of the support frame 52, it is possible to form a low pressure region in the upper end opening 1 b of the cylinder 1. That is, even when the vertical axis type windmill 40 is not provided, the internal flow Fb1 is accelerated by the action of the guide bodies 50, 50 facing each other so as to sandwich the space above the upper end opening 1b of the cylindrical body 1. Therefore, the upper end opening 1b of the cylinder 1 becomes a low pressure, and the artificial airflow Fa generated in the cylinder 1 is accelerated.

  Further, the low pressure forming means A4 may be provided with a vortex generator C4 that is connected to the rotating shaft 41 of the vertical axis type windmill 40 and accommodated in the interior immediately above the cylindrical body 1. The vortex generator C4 includes a second arm 47 extending radially from a position below the upper end opening 1b of the rotating shaft 41 extending to the inside immediately above the cylindrical body 1 and a tip of the second arm 47. And a plate-like stirring body 48 provided vertically. The vertical axis type windmill 40 and the vortex generator C4 are connected to each other via a rotating shaft 41, and the blade 46 and the stirring member 48 rotate coaxially via the rotating shaft 41. The plate-like stirring body 48 is suspended from the tip of the second arm 47 so as to face the rotational direction directly inside the cylinder 1.

  Accordingly, the agitator 48 also rotates coaxially around the rotation axis 41 in conjunction with the rotation of the blade 46 by the natural air flow Fb, and the air inside the cylinder 1 is agitated, so that the cylinder directly above the cylinder 1 is agitated. A vertical vortex V5 having a strong vorticity around the central axis 1 is generated, and a strong low pressure region L5 is formed. Then, the artificial airflow Fa generated in the cylindrical body 1 is accelerated by the formed low pressure region L5.

  The number of the stirring bodies 48 is not particularly limited, but when a plurality of stirring bodies 48 are provided, it is preferable to arrange the plurality of stirring bodies 48 so that the center of gravity comes on the rotation shaft 41 in consideration of the balance during rotation.

  Further, when the guide bodies 50, 50 that cover the vertical axis wind turbine 40 from the side are further provided in the same manner as the above-described configuration, the rotational speed of the stirring body 48 becomes faster and the pressure in the low pressure region L5 further decreases.

  12 and 13 are views showing a modified example of the low-pressure forming means A4 provided with the vertical axis type windmill 40. FIG. FIG. 12A is a perspective view of the low pressure forming means A4 ′ according to this modification, FIG. 12B is a plan view of the low pressure forming means A4 ′, and FIG. 13 is a part of the low pressure forming means A4 ′. It is sectional drawing. The low pressure forming means A4 ′ and the low pressure forming means A4 described above are different only in the configuration of the vortex generators C4 and C4 ′. In the configuration of the low pressure forming means A4 ′ shown in FIGS. , 11, the same reference numerals are given to the same components as those of the low-pressure forming means A4, and the description thereof will be omitted as appropriate.

  The low pressure forming means A4 ′ is connected to the rotating shaft 41 of the vertical axis type windmill 40 rotatably disposed above the upper end opening 1b of the cylindrical body 1 and accommodated and disposed in the interior immediately above the cylindrical body 1. A vortex generator C4 ′.

  The vortex generator C4 'is composed of a helical screw-like stirring body 48' provided on the lower side of the upper end opening 1b of the rotating shaft 41 extending to the inside immediately above the cylinder 1. The vertical axis wind turbine 40 and the vortex generator C4 'are connected to each other via a rotating shaft 41, and the blade 46 and the helical screw-like stirring body 48' rotate coaxially via the rotating shaft 41. The helical screw-shaped stirring body 48 ′ is configured to send the air directly above the cylinder 1 upward by rotating coaxially with the rotation of the blade 46 by the natural airflow Fb. That is, when the blade 46 of the vertical axis type windmill 40 is configured to rotate clockwise in plan view, the spiral screw-shaped stirring body 48 ′ is a right-hand screw type, and the blade 46 of the vertical axis type windmill 40 is flat. When configured to rotate counterclockwise, the spiral screw-shaped stirring member 48 'may be a left-handed screw type. Since the blade 46 of the vertical axis wind turbine 40 shown in FIGS. 12 and 13 is configured to rotate counterclockwise in plan view, the spiral screw-shaped stirring member 48 ′ is a left-handed screw type.

  Accordingly, the helical screw-like stirring body 48 ′ rotates coaxially around the rotation shaft 41 in conjunction with the rotation of the blade 46 by the natural air flow Fb, and the air directly above the cylindrical body 1 is stirred. A vertical vortex V6 having a strong vorticity around the central axis of the cylindrical body 1 is generated in the interior immediately above, and a strong low pressure region L6 is formed. Then, the artificial airflow Fa generated inside the cylindrical body 1 is accelerated by the formed low pressure region L6.

  Further, the low-pressure forming means A4 'may be provided with a pair of guide bodies 50, 50 having a substantially L shape in plan view that covers the vertical axis wind turbine 40 from the side. In addition, since it is the same as that of the case of the said low voltage | pressure formation means A4 about the structure of a pair of guide bodies 50 and 50, its effect | action, an effect, etc., description here is abbreviate | omitted.

[Low-pressure forming means composed of an uneven upper end opening]
FIG. 14 shows a perspective view of a low pressure forming means A5 which is still another example of the configuration of the low pressure forming means A.

  In the present configuration example, the upper end edge 1d of the cylindrical body 1 is formed in an uneven shape, and the uneven portion 60 formed in the uneven shape functions as the low pressure forming means A5. That is, when the natural air flow Fb acts from the outer surface side of the convex portion 61 of the convex concave portion 60, the vortex row V7 having a strong vorticity in the upper end opening 1b due to the flow separated from the convex upper edge 62 and the convex left and right edges 63. Produces. The region where the vortex row V7 is generated has a lower pressure than the surrounding atmospheric pressure, and a strong low pressure region L7 is formed. As a result, the artificial airflow Fa generated inside the cylinder 1 is accelerated.

  As shown in FIG. 15, the low-pressure forming means A5 includes a pair of vertical L-shaped members in a plan view that is configured to cover the convex and concave portions 60 from the side and be rotatable about the central axis of the cylindrical body 1. Plate-shaped guide bodies 70 and 70 may be provided. The pair of guide bodies 70 are disposed so as to face each other with the convex recess 60 interposed therebetween. The horizontal distance from the center of the rotation shaft 41 at an arbitrary position on the inner side surface of the pair of guide bodies 70, 70 is configured to be larger than the outer peripheral radius of the upper end opening 1b. The lower end edges 70a, 70a of the pair of guide bodies 70, 70 extend until they are positioned below the recess bottom edge 64 of the convex recess 60, and the upper end edges 70b, 70b of the pair of guide bodies 70, 70 are uneven. It extends until it is located above the upper edge 62 of the convex part of the part 60. The other configuration of the pair of guide bodies 70 and 70 corresponds to the configuration of the pair of guide bodies 50 and 50 described above, and the function and effect of the pair of guide bodies 70 and 70 is the same as that of the pair of guide bodies 50 and 50 described above. Since it is the same as the case of 50, in FIG. 15, the same code | symbol is attached | subjected to the component similar to the structural example of the low voltage | pressure formation means A4 shown to FIG. 10, 11, and description is abbreviate | omitted suitably.

  In the low pressure forming means A5 provided with the pair of guide bodies 70, 70, the internal flow Fb1 passing between the pair of guide bodies 70, 70 increases, so that the vortex generated in the upper end opening 1b by the action of the convex recess 60. The vorticity of the row V7 becomes stronger and the low pressure region L7 becomes lower pressure. As a result, the artificial airflow Fa generated inside the cylindrical body 1 is further accelerated, and the amount of power generated by the impeller 4 is increased.

  Furthermore, although illustration is omitted, it is possible to further provide the low pressure forming means A5 with the same configuration as that of the low pressure forming means A1 to A4 'shown in FIGS. Further, when the vertical axis wind turbine 40 and the vortex generators C4 and C4 ′ are provided in the low pressure forming means A5 and the pair of guide bodies 70 and 70 are provided, both the convex recess 60 and the vertical axis wind turbine 40 are laterally provided. What is necessary is just to extend a pair of guide bodies 70 and 70 to an up-down direction so that it can cover.

  As described above, the power generation device P of the present invention is configured to increase the power generation efficiency using renewable natural energy. That is, the power generation device P of the present invention collects the airflow on the impeller 4 by increasing the flow of the generated artificial airflow Fa in addition to the wind generating effect of generating the artificial airflow Fa using solar energy. It is what has. A solar tower type power generator having such a wind collecting effect has not been proposed. Since the amount of power generated by wind power generation is proportional to the cube of the wind speed, it can be said that this wind collection effect contributes greatly to the power generation efficiency. As described above, according to the power generation device P of the present invention, the artificial airflow Fa generated inside can be increased even with a relatively small structure, so that the power generation amount can be increased and the power can be stably supplied. It is possible to supply.

  Furthermore, the cogeneration system using the power generation device P that can use the exhaust heat and the power generation device P that includes the solar battery panel 8 can also use the heat energy that has been abandoned in the past. It can be expected to be realized.

  As mentioned above, although embodiment of this invention was described in detail based on drawing, these are illustrations, Based on the knowledge of those skilled in the art, the form which changed various combinations, various deformation | transformation, improvement, etc. are shown. It is possible to implement the present invention in other forms. It goes without saying that the present invention is not limited to the configurations and combinations shown in the drawings, and can be appropriately changed without departing from the spirit and technical idea described in the embodiment for carrying out the invention.

DESCRIPTION OF SYMBOLS 1 Cylindrical body 1a Lower end opening part 1b Upper end opening part 1c Throat part 1d Upper end edge 2 Translucent body 3 Air flow path 4 Impeller 5 Generator 8 Solar cell panel 9 Weather vane stabilization means 13, 23, 33 Wind receiver 14, 24 End plate 40 Vertical axis type windmill 41 Rotating shaft 46 Blade 48, 48 'Stirring body 50, 70 Guide body 50a Guide portion 50b Vortex generating portion 60 Convex recess A, A1, A2, A3, A4, A4', A5 Low pressure forming means C1, C2, C3, C4, C4 'Vortex generator Fb Natural airflow G Ground Hc Heat collection part Hr Heat radiation part P Power generator

Claims (20)

A vertically-expanding cylindrical body,
A heat collecting section including a translucent body provided with a space between the bottom surface opening of the cylindrical body and a space between the ground; and
An air flow passage formed by communicating the space between the ground and the translucent body and the internal space of the cylindrical body;
An impeller provided in the air flow path;
A generator that generates power in conjunction with the rotation of the impeller;
An artificial airflow generated by forming a low-pressure region above the upper end opening of the cylindrical body by a natural airflow that flows substantially horizontally and increasing the temperature of the air existing between the ground and the translucent body is Low pressure forming means for increasing the speed of ascending in the cylinder,
The low-pressure forming means includes a plate-like or prismatic vortex generator that forms the low-pressure region by generating an air flow with a vortex facing the natural air flow direction at an upper end of the cylindrical body.   The power generation device according to claim 1, wherein the heat collecting unit includes a heat radiating unit disposed below the light transmitting body.   The power generation device according to claim 2, wherein the heat radiating unit includes a solar cell panel provided with a flat surface in a vertical direction.   The low-pressure forming means includes an independent rotation axis coaxial with the axis of the cylinder disposed in the vicinity of the upper end opening of the cylinder, and an upper end edge of the cylinder that is rotatably connected to the rotation axis. The power generator according to any one of claims 1 to 3, further comprising the vortex generator disposed between the two.   The power generator according to any one of claims 1 to 3, wherein the vortex generator of the low-pressure forming means includes a convex and concave portion formed by making the upper end edge of the cylindrical body convex and concave. The low-pressure forming means includes a pair of vertical plate-like guide bodies disposed facing each other so as to sandwich the convex and concave portions,
The pair of vertical plate-shaped guide bodies have guide portions that are arranged in a face-to-face manner along the natural airflow that flows substantially horizontally through the upper end opening of the cylindrical body,
The pair of vertical plate-shaped guide bodies has an independent rotation axis coaxial with the axis of the cylinder disposed in the vicinity of the upper end opening of the cylinder and is rotatably connected to the rotation axis. The power generation device according to claim 5, wherein the power generation device is rotatably arranged around a central axis of the cylindrical body.   The power generation according to claim 6, wherein the pair of vertical plate-shaped guide bodies have a vortex generating portion that is formed so as to be opposed to the natural airflow by bending outward the edge portion on the expansion side of the guide portion. apparatus.   The vortex generating body of the low-pressure forming means is a rectangular plate and is suspended above the upper end edge of the cylindrical body with a space between the upper end edge and supported by the upper end of the rotating shaft and substantially horizontally. The power generation device according to claim 4, wherein the power generation device is connected to one end of an extending horizontal rod.   The vortex generating body of the low-pressure forming means is a prismatic shape, and is provided horizontally above the upper end edge of the cylindrical body with a space between the upper end edge, and is supported at the upper end of the rotating shaft and extends substantially horizontally. The power generator according to claim 4 connected to one end of a horizontal rod.   10. The power generation according to claim 9, wherein the prismatic vortex generator has w / h = 0.5 to 0.7 when the height is h and the front-rear width in the flow direction of the natural airflow is w. apparatus.   The power generator according to any one of claims 8 to 10, comprising end plates at both ends of the vortex generator.   The vortex generating body of the low-pressure forming means is a triangular plate and is obliquely provided above the upper end edge of the cylindrical body with a gap between the upper end edge and supported at the upper end of the rotating shaft and extends substantially horizontally. The power generator according to claim 4 connected to one end of a horizontal rod.   The low pressure forming means includes a wind vane stabilizing means having a flat wind receiver, and the low pressure forming means is disposed so as to face the natural airflow flowing substantially horizontally above the upper end opening of the cylindrical body. The power generator according to any one of claims 4 and 8 to 12.   5. The power generator according to claim 4, wherein the vortex generator of the low-pressure forming unit is configured by a vertical axis wind turbine having a plurality of vertically long blades and is disposed above the upper end edge of the cylindrical body. . The low-pressure forming means includes a pair of vertical plate-shaped guide bodies disposed facing each other so as to sandwich a rotation space of a plurality of blades of the vertical axis wind turbine,
The pair of vertical plate-shaped guide bodies have guide portions that are arranged to face each other in an expanded manner along the natural airflow that flows substantially horizontally above the upper end opening of the cylindrical body,
The power generator according to claim 14, wherein the pair of vertical plate-shaped guide bodies are rotatably disposed around the rotation axis independently of the vertical axis wind turbine.   The power generation according to claim 15, wherein the pair of vertical plate-shaped guide bodies includes a vortex generating portion formed so as to bend outwardly on an enlarged side edge portion of the guide portion so as to face the natural airflow. apparatus.   The power generation device according to claim 14 or 15, further comprising an agitator that is connected to the rotation shaft of the vertical axis wind turbine and is housed and disposed immediately above the cylindrical body.   The power generator according to any one of claims 1 to 17, wherein the impeller is rotatably disposed around a central axis of the cylindrical body at a throat portion where a horizontal cross-sectional area of the air flow passage is minimized. The power generator according to claim 2, wherein the heat dissipating unit is configured to be able to dissipate heat derived from exhaust heat. The power generator according to claim 2, wherein the heat radiating unit is configured to be able to radiate heat derived from geothermal heat.

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