Sand heat storage type wind power generation device

Abstract

To provide a sand heat storage type wind power generation device which has: sand base material containing silica sand, silica sands or sand in a sand container; a wind tunnel; a windmill; and a wind power generator and performs wind power generation by utilizing an ascending air current in the wind tunnel.SOLUTION: A sand heat storage type wind power generation device stores heat in a sand base material as thermal energy from heating by means of a heater from outer electric power such as surplus power, heating by means of a heat exchanger, heating by means of a thermal conductor, warm heating, dry steam heating, and heating by means of solar light heating etc. When the electric power demand is required for the outside, the device performs power generation driven by a wind power generator which is driven by a wind mill. A drive of the wind mill is caused by ascending air current of air quantity correlated to inside / outside temperature difference of air within a wind tunnel generated by a rise of air temperature inside the wind tunnel by the thermal energy, a height difference of the position of an opening part in the wind tunnel, and an effective area of the opening part in the wind tunnel.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention has a sand base material for storing thermal energy in a sand container and a wind tunnel, This relates to a sand heat storage type wind power generation device, characterized in that it is configured to be able to store heat from the outside in the sand base material inside the sand container, drive a windmill by the warm rising air current of the air inside the wind tunnel, generate electricity using a wind power generator driven in conjunction with the windmill, and output electricity to the outside when electricity is needed, or output electricity to the outside using a heat exchanger. [Background technology]

[0002] Patent Document 1 describes the wind power generation device as follows: a wind tunnel installed in the extension direction, a plurality of wind inlets provided on the peripheral wall of the cylindrical member for guiding the wind collected by the wind collecting plates into the wind tunnel, and a turbine provided between adjacent wind collecting plates that is driven by the wind collected by the wind collecting plates.

[0003] Patent Document 2 describes a rotating blade for an axial flow turbine wind turbine, which is characterized in that the rotating blade has a shape in which multiple blade flats extend from a circular, flat wheel plate, the thickness of the rotating blade is uniform overall, and a curved plate member that is open on the downwind side and has an arc-shaped cross section is attached to the leading edge of each blade flat in the rotation direction.

[0004] Furthermore, Patent Document 3 states that by attaching the blade so that a negative angle β is formed between the airflow W2 onto the blade and the plane corresponding to the ninth line segment of the blade, it is possible to add a negative pressure due to the negative angle β to the lift force explained by Bernoulli's theorem. Therefore, it is possible to obtain a large torque and increase the efficiency of the wind turbine.

[0005] Furthermore, Patent Document 4 describes a vertical axis wind turbine equipped with a lift-type wind turbine and a drag-type wind turbine whose rotation axes are on concentric axes. More specifically, it describes a vertical axis wind turbine equipped with a lift-type wind turbine and a drag-type wind turbine, which can generate high torque by utilizing the surface effect in addition to the Magnus effect, and can therefore achieve high rotational efficiency despite its small size.

[0006] Furthermore, Patent Document 5 describes a wind power generation device that utilizes the characteristics of the Savonius blades when starting rotation or when there is a light breeze, and that can efficiently convert the rotational energy of the Darrieus blades and Savonius blades into electrical energy regardless of the wind speed. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Re-listed 2008 / 0756766 publication [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-241705 [Patent Document 3] Japanese Patent Application Publication No. 06-159222 [Patent Document 4] Patent No. 6165303 [Patent Document 5] Japanese Patent Application Laid-Open No. 2007-107496 Summary of the Invention [Problem to be solved by the invention]

[0008] Patent Document 1 describes a wind power generation device that includes a wind tunnel installed in the extension direction, multiple wind intakes provided on the peripheral wall of the cylindrical member that guide the wind collected by the wind collecting plates into the wind tunnel, and a turbine-type wind power generation device that is provided between adjacent wind collecting plates and is driven by the wind collected by the wind collecting plates.However, a wind tunnel with multiple wind intakes has a complex configuration and is directly affected by external wind (such as wind dust), so construction costs and maintenance costs are high and maintenance work is expected to be difficult.

[0009] Patent Documents 2, 3, and 4 do not describe wind power generation methods. Patent Document 5 describes a Savonius wind power generator in which Savonius blades are attached to a rotating rotor shaft, in which a shaft hole is provided along the central axis and extends a predetermined length from the bottom end of the rotor shaft, and a hollow shaft outer rotor type generator is attached to the bottom end of the rotor shaft, and a vertically standing utility pole or support is fitted into the shaft hole through the utility pole hole in the fixing frame of the hollow shaft outer rotor type generator, with the upper end supported by a bearing, and describes the attachment of the generator. [Means for solving the problem]

[0010] The present invention provides a wind power generator that includes a sand-based material containing silica sand, silica sands, or sands, a wind tunnel, a sand container that stores the sand-based material, a wind tunnel front chamber connected to the wind tunnel, a wind turbine installed in the wind tunnel and / or the wind tunnel front chamber, and a wind power generator that is connected to and driven by the wind turbine, wherein the sand-based material stores heat as thermal energy, and when external power is required, the thermal energy causes an increase in the temperature of the air in the wind tunnel, which generates an updraft that drives the wind turbine, and the wind power generator is driven in conjunction with the wind turbine. The sand thermal storage wind power generation device of the present invention is characterized in that it is configured to generate power using the wind power generator connected to the wind power generator, and since the wind turbine is installed in the wind tunnel and / or in the wind tunnel front room and the wind power generator is connected to and driven by the wind turbine, power can be generated even with a weak wind flow velocity in the wind tunnel, damage is reduced, replacement frequency is low, it is less susceptible to damage from lightning strikes, etc., the cost of thermal storage materials is low, construction costs and maintenance costs are low, the installation site can be installed adjacent to a demand area, and it can help reduce power transmission costs. The investment amount is low relative to the amount of power generated. The purpose is to provide these effectively.

[0011] The sand thermal storage wind power generation device according to the present invention comprises: a sand-based material including silica sand, silica sands, or sands; a wind tunnel having an upper opening and a lower opening; a sand container disposed around a side wall of the wind tunnel and containing the sand base material; a wind tunnel front chamber having a wind inlet and connected to the wind tunnel; a wind turbine installed in the wind tunnel and / or the wind tunnel front room; a wind power generator connected to and driven by the wind turbine, The sand base material stores heat as thermal energy obtained by at least one of heating using a heater from external power such as surplus power, heating using a thermal conductor, heating using a heat exchanger, warm heating using a steam pipe, dry steam heating, or solar radiation heating; When external power is required, the wind turbine is driven by an updraft of air volume caused by the temperature rise of the air in the wind tunnel due to the thermal energy stored in the sand base material, which is related to the temperature difference between the inside and outside of the air in the wind tunnel, the elevation difference of the position of the opening of the wind tunnel, and the effective area of ​​the opening of the wind tunnel. The wind power generator is driven in conjunction with the wind turbine to generate electricity.

[0012] In addition, in the sand thermal storage type wind power generation device according to the present invention, The sand base material is heated by a heater using electricity generated by the wind power generator. The heat is stored as thermal energy obtained by at least one of heating using a heater from external power such as surplus power, heating using a thermal conductor, heating using a heat exchanger, warm heating using steam piping, dry steam heating, or solar radiation heating, The device may be characterized in that when external power is required, the thermal energy stored in the sand base material can be output to the outside via the heat exchanger or thermal conductor.

[0013] In addition, in the sand thermal storage type wind power generation device according to the present invention, The wind turbine may be a horizontal axis wind turbine or a vertical axis wind turbine, and may have at least one of a limit load fan, a turbine wind turbine, a Bernoulli theorem wind turbine, a propeller wind turbine, a cell wing wind turbine, a multi-blade wind turbine, a Magnus wind turbine, a Darrieus wind turbine, a Savonius wind turbine, a Gyaromill wind turbine, a cross-flow wind turbine, a Sirocco fan, a turbo fan, a line fan, or an S-type wind turbine.

[0014] In addition, in the sand thermal storage type wind power generation device according to the present invention, The front wind tunnel chamber opening of the front wind tunnel chamber has a lid portion, the lid portion is provided to cover a part of the front chamber of the wind tunnel and be openable and closable; the opening of the front chamber of the wind tunnel can be kept closed by the lid except when the wind turbine or the wind power generator is being installed or maintained and inspected; The front chamber of the wind tunnel has a wind inlet, a wind inlet chamber, and a wind inlet cover on its upper side, The height of the air inlet is set so as to be able to prevent the inflow of water and dust from the outside, and the air inlet cover of the air inlet can be opened and closed to adjust the amount of air inflow, and is set so as to be able to allow air to flow in from the outside as needed, The wind tunnel front chamber has an air inlet on the side and a drainage and dust removal section on the bottom. The air inlet on the side may be configured to allow air to flow in from the outside as needed, and the drainage / dust removal section may be configured to allow drainage and dust removal.

[0015] In addition, in the sand thermal storage type wind power generation device according to the present invention, The silica sand or silica sand-like material serving as the sand base material may be heated to 1000°C or higher, allowing heat storage at high temperatures.

[0016] In addition, in the sand thermal storage type wind power generation device according to the present invention, Heating by a heater as a means for storing heat from the outside in the sand base material in the sand container, such as silica sand, silica sands, or sands; Heating by equipment that exchanges thermal energy as a heat exchanger, Heat conduction using aluminum, aluminum alloy, silicon carbide, gallium nitride, or copper as a thermal conductor. Heating by steam pipes for heating as steam heating, Alternatively, the method may be characterized by heating with dry steam.

[0017] In addition, in the sand thermal storage type wind power generation device according to the present invention, If you do not need external power output, By closing the air inlet cover of the air inlet, the sand base material can store more heat energy, and the temperature of the air in the wind tunnel can be increased.

[0018] In addition, in the sand thermal storage type wind power generation device according to the present invention, The outer surface of the sand container for storing the thermal energy is made of a material with good thermal insulation such as insulating steel, insulating concrete, insulating cement, etc. The inner surface of the sand container that stores the thermal energy may be characterized by using a material with good thermal conductivity, such as aluminum, aluminum alloy, silicon carbide, gallium nitride, or copper, which is a thermal conductor.

[0019] In addition, in the sand thermal storage type wind power generation device according to the present invention, the sand base material is Electricity generated by wind power, solar power, geothermal power, thermal power, hydroelectric power, nuclear power, etc. is heated by heaters, heat conductors, heat exchangers, steam pipe heating, or dry steam heating. The sand base material having thermal energy is stored in the sand container made of insulating concrete, When the demand for electricity is high, the thermal energy may be converted into electrical power by the wind power generator, the heat exchanger, or the thermal conductor.

[0020] In addition, in the sand thermal storage type wind power generation device according to the present invention, The air volume Q of the ascending air current may be treated in relation to the product of the square root of the product of the height H of the wind tunnel and the temperature difference T between the inside and outside of the air in the wind tunnel, and the effective area A of the opening of the wind tunnel; and when there is a temperature difference between the inside and outside of the air in the wind tunnel, a density difference occurs in the air in the wind tunnel, which in turn causes a pressure difference between the inside and outside, thereby generating an ascending air current.

[0021] In addition, in the sand thermal storage type wind power generation device according to the present invention, As for the type of the limit load fan, the limit load fan is a type of centrifugal fan with characteristics intermediate between a sirocco fan and a turbo fan. There are two types of limit load fans depending on the shape of the impeller blades: LLA type: The blades are wing-shaped, making it low noise and highly efficient. LLB type: The blade is flat, so it is resistant to high temperatures and humidity, and is corrosion resistant. The limit load fan is characterized by the shaft power not exceeding a certain value. No overload occurs and high static pressure efficiency is achieved. In the present invention, when wind speed in a wind tunnel fluctuates, the amount of power generated also fluctuates. To withstand overload, a fan with a constant shaft power, such as a limit load fan, is suitable. With a limit load fan, the shaft power does not exceed a certain value even when the air volume or wind pressure changes. This prevents overload on the wind turbine and wind power generator, enabling stable power generation. Furthermore, limit load fans have high static pressure efficiency. Static pressure efficiency is the ratio of input energy to output energy of a fan. The higher the static pressure efficiency, the better the performance of the fan. Sirocco fans are also known as multi-blade fans. They are fans with many blades attached in the direction of rotation. The long, thin blades are attached to a cylinder, and by rotating these blades, they draw in and exhaust air.

[0022] In addition, in the sand thermal storage type wind power generation device according to the present invention, Horizontal axis wind turbines must remain parallel to the changing wind direction. The lift type includes the propeller windmill and ribbon windmill, while the drag type includes the multi-blade windmill, cell wing windmill, windmill, and Dutch windmill. Vertical axis wind turbines include the Darrieus turbine and the Gyromill turbine as lift types, and the Savonius turbine, the crossflow turbine, the S-type turbine, and the Patreon turbine as drag types. Vertical axis wind turbines have a rotation axis perpendicular to the wind direction, and are usually installed so that the rotation axis is perpendicular to the ground. This means that the wind always blows at a right angle to the rotation axis, eliminating the need for directional control. Darrieus turbines are shaped so that the centrifugal force acting on the blades acts as a tensile stress, and the blade pitch is fixed. Gyromill turbines (H Darrieus turbines, linear Darrieus turbines) have straight blades, which allow for variable pitch and make them easier to start even in light breezes.

[0023] In addition, in the sand thermal storage type wind power generation device according to the present invention, Examples of the vertical axis wind turbine include: Regarding a vertical axis wind turbine equipped with a lift type wind turbine and a drag type wind turbine whose rotation axes are on concentric axes, the vertical axis wind turbine may be characterized as being equipped with a lift type wind turbine and a drag type wind turbine, and capable of generating high torque by utilizing the surface effect in addition to the Magnus effect, thereby achieving high rotational efficiency despite its small size.

[0024] In addition, in the sand thermal storage type wind power generation device according to the present invention, A plurality of the wind turbines and the wind power generators connected to and driven by the wind turbines can be installed in the wind tunnel front chamber of the wind tunnel. Also, a plurality of the wind tunnel front chambers can be provided around the wind tunnel, and a plurality of the wind power generators connected to and driven by the wind turbines can be installed.

[0025] When the axial flow wind turbine or the axial flow turbine type wind turbine is installed, the side wall of the wind tunnel has a substantially cylindrical shape.

[0026] In addition, in the sand thermal storage type wind power generation device according to the present invention, The outer wall of the sand container varies depending on the weight per heat dissipation surface and how the heat insulation material is inserted to retain heat. When storing and radiating heat using stones, the stored heat energy is radiated with a significant peak time lag and peak energy decay.

[0027] The sand base material may be made of dried silica sand or other sands. [Effects of the Invention]

[0028] The present invention provides a sand thermal storage type wind power generation device, and the sand base material containing silica sand, silica sands, or sands is: Heat is stored as thermal energy by heating with a heater from external power such as surplus electricity, heating with a heat exchanger, heating with a heat conductor, thermal heating, dry steam heating, solar heating, etc. When electricity is needed externally, the thermal energy stored in the sand base material causes the temperature of the air in the wind tunnel to rise, resulting in an updraft of air of a volume related to the temperature difference between the inside and outside of the air in the wind tunnel, the elevation difference between the positions of the openings of the wind tunnel, and the effective area of ​​the openings of the wind tunnel, which acts to drive the wind turbine and generates electricity using the wind power generator driven by the wind turbine. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 shows an example of a sand thermal storage type wind power generation apparatus W according to an embodiment of the present invention. [Figure 2] FIG. 2 shows an example of a sand thermal storage type wind power generator W according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] Hereinafter, embodiments of the present invention will be described.

[0031] According to the literature, excellent energy storage technology is important for effectively utilizing intermittent renewable energy sources such as solar and wind power. Surplus electricity from solar and wind power is used to power a heater, which heats the heat storage material, silica sand, to 1200°C, and the sand containing the thermal energy is stored in the sand container made of insulated concrete. When electricity demand is high, the sand is output from the heat exchanger to generate electricity, and when electricity rates are low, the sand base material is heated again to store the energy. The baseline system is expected to store up to 26,000 MWh of thermal energy, and has the advantages of low cost, high efficiency, and safety. Furthermore, because silica sand is an inert material, it is suitable for the long-term storage of large amounts of energy. There are no particular restrictions on installation location, and it can be installed anywhere, in vacant lots, at high altitudes, or in cold regions, and it is relatively easy to change the storage capacity. It is said that decarbonization is also possible by converting renewable electricity into heat.

[0032] Furthermore, when storing and releasing heat in the sand-based material, the stored heat energy is released with a significant peak time lag and peak energy decay. This varies depending on the weight per heat-releasing surface and the type of insulation used for heat retention. For example, if one side of a 10cm-thick pile of solid marble is heated, the peak heat release from the other side will occur with a time lag of roughly 7 hours. In this case, the decay rate is said to be just under 50% of the peak input heat energy without insulation.

[0033] The present invention will now be described in detail with reference to a wind power generator that utilizes the ability of sand-based materials to store large amounts of thermal energy.

[0034] In the sand thermal storage type wind power generation device according to the present invention, The air volume Q of the ascending air current is treated in relation to the product of the square root of the product of the height H of the wind tunnel and the temperature difference T between the inside and outside of the air in the wind tunnel, and the effective area A of the opening of the wind tunnel, and when there is a temperature difference between the inside and outside of the air in the wind tunnel, a density difference occurs in the wind tunnel, which in turn creates a pressure difference between the inside and outside, thereby generating an ascending air current. Furthermore, the sand-based material containing silica sand, silica sands, or sands that stores thermal energy according to the present invention constitutes the dried sand-based material.

[0035] As an embodiment of the present invention, the sand thermal storage type wind power generating device W is shown in conceptual diagram 1 and conceptual diagram 2 as a product configuration. In the sand thermal storage type wind power generation device W according to the present invention, A sand-based material 3 containing silica sand, silica sands, or sands; a wind tunnel 6 having an upper opening 4 and a lower opening 5; arranged around the side wall of the wind tunnel 6, A sand container 1 containing the sand base material 3, a sand container installation section 2, a wind tunnel front chamber 9 having a wind inlet 71 and connected to the wind tunnel 6; a wind turbine 8, 81, 85, or 86 installed in the wind tunnel 6 and / or the wind tunnel front chamber 9, and a wind power generator 10, 11, 15, or 16 connected to and driven by the wind turbine; The sand base material 3 stores heat as thermal energy obtained by at least one of heating using a heater 18 from external power such as surplus power, heating using a thermal conductor, heating using a heat exchanger 17, warm heating using a steam pipe, dry steam heating, or solar radiation heating, When external electricity is required, the thermal energy stored in the sand base material 3 causes the temperature of the air in the wind tunnel 6 to rise, which causes an updraft of air volume related to the temperature difference between the inside and outside of the air in the wind tunnel 6, the elevation difference between the positions of the openings 4 and 5 of the wind tunnel 6, and the effective area of ​​the openings 4 and 5 of the wind tunnel 6.This drives the wind turbine, and electricity is generated by the wind power generator, which is driven in conjunction with the wind turbine.This is a sand thermal storage wind power generation device W. Furthermore, when no external power output is required, by closing the air inlet lid 73 of the air inlet 71, the heat energy storage capacity of the sand base material 3 is increased, and the temperature of the air in the wind tunnel 6 is raised to a higher temperature.

[0036] As another embodiment of the present invention, in the sand thermal storage type wind power generation device W according to the present invention, The sand base material 3 stores heat as thermal energy obtained by at least one of heating using a heater 18 of electric power generated by the wind power generators 10, 11, 15, or 16, heating using a heater 18 from external electric power such as surplus electric power, heating using a thermal conductor, heating using a heat exchanger 17, warm heating using a steam pipe, dry steam heating, or solar radiation heating; This sand thermal storage wind power generation device W is characterized by being configured so that when external power is required, the thermal energy stored in the sand base material 3 can be output to the outside via the heat exchanger 17 or a thermal conductor.

[0037] In one embodiment of the present invention, the wind turbines 8 and 81 are horizontal axis wind turbines, The wind turbines 85, 86 are vertical axis wind turbines, and are characterized in that they have at least one of a limit load fan, a turbine wind turbine, a Bernoulli theorem wind turbine, a propeller wind turbine, a cell wing wind turbine, a multi-blade wind turbine, a Magnus wind turbine, a Darrieus wind turbine, a Savonius wind turbine, a Gyaromill wind turbine, a cross-flow wind turbine, a Sirocco fan, a turbo fan, a line fan, or an S-type wind turbine. Furthermore, depending on the direction of wind inflow, the limit load fan is suitable for the rotation shaft of the wind turbine 86 and the wind power generator 16.

[0038] As another embodiment of the present invention, in the sand thermal storage type wind power generation device W according to the present invention, a sand container (1); a sand container installation section (2); a sand base material (3) containing silica sand, silica sands, or sands; a sand container (1) containing the sand base material (3); a wind tunnel front chamber (9) having an air inlet (71) and connected to the wind tunnel (6) and extending in a direction intersecting the upper direction of the wind tunnel (6); Or, a wind tunnel 6 having an upper opening 4 and a lower opening 5 installed vertically from the foundation surface; a sand container 1 arranged around the side wall of the wind tunnel 6 and containing the sand base material 3; a wind tunnel front chamber 9 connected to the wind tunnel 6 and extending horizontally from the base surface; It also has an air inlet 71 and an air inlet chamber 72.

[0039] As another embodiment of the present invention, in the sand thermal storage type wind power generation device W according to the present invention, The wind tunnel front chamber openings 13 and 14 of the wind tunnel front chamber 9 have lids, The lid portion is provided to cover a part of the wind tunnel front chamber 9 and be openable and closable. the wind tunnel front chamber openings 13, 14 can be kept closed by the lids except when the wind turbines 81, 85, or 86 and / or the wind power generators 11, 15, or 16 are installed or maintained; The wind tunnel front chamber 9 has a wind inlet 71, a wind inlet chamber 72, and a wind inlet cover 73 on its upper side. The height of the air inlet 71 is set so as to be able to prevent the inflow of water and dust from the outside, and the air inlet cover 73 of the air inlet 71 can be opened and closed to adjust the amount of air that flows in, so that air can flow in from the outside as needed. The wind tunnel front chamber 9 has an air inlet on a side of the wind tunnel front chamber opening 14 and a drainage and dust removal section 12 on a lower side, and the air inlet on the side is set to allow air to flow in from the outside as needed, The sand thermal storage type wind power generator W is characterized in that the drainage and dust removal section 12 is configured to be capable of draining water and removing dust. When installing or maintaining the wind turbine 81, 85, or 86 and the wind power generator 11, 15, or 16, the entire upper surface of the wind tunnel front chamber 9 can be configured to be removable.

[0040] Furthermore, as an embodiment of the present invention, a plurality of the wind power generators 11, 15, or 16 connected to and driven by the wind turbines 81, 85, or 86 can be installed in the wind tunnel front chamber 9 of the wind tunnel 6. Furthermore, a plurality of the wind tunnel front chambers 9 can be provided around the wind tunnel 6 (not shown).

[0041] Furthermore, as one embodiment of the present invention, in the sand thermal storage type wind power generation device W of the present invention, the sand container 1 can be characterized in that its cross-sectional outer shape is approximately circular, approximately elliptical, approximately semicircular, approximately crescent-shaped semicircular, approximately triangular, approximately rectangular, or polygonal.

[0042] In one embodiment of the present invention, the wind turbine 8 or 81 is a horizontal axis wind turbine, such as a propeller wind turbine, a turbine wind turbine, a Bernoulli theorem wind turbine, or a ribbon wind turbine, and a drag type wind turbine such as a cell wing wind turbine, a multi-blade wind turbine, a Dutch wind turbine, or a vane type wind turbine, and is a sand thermal storage wind power generation system W that drives the wind turbine and generates electricity with the wind power generator 10 or 11 driven by the wind turbine.

[0043] In one embodiment of the present invention, the wind turbine 85 or 86 is an example of a vertical axis wind turbine, and includes a Darrieus wind turbine or a Gyaromyel wind turbine as a lift type, and a crossflow wind turbine, a Savonius wind turbine, a Magnus wind turbine, a Buttle wind turbine, an S-type wind turbine, or the like as a drag type, and drives the wind turbine to generate electricity with the wind power generator 15 or 16, in the sand thermal storage wind power generation device W.

[0044] An example of the vertical axis wind turbine of wind turbine 85 or 86 is a vertical axis wind turbine equipped with a lift type wind turbine and a drag type wind turbine whose rotation axes are on concentric axes. The vertical axis wind turbine is equipped with a lift type wind turbine and a drag type wind turbine, and is capable of generating high torque by utilizing the surface effect in addition to the Magnus effect, so it is a vertical axis wind turbine that can achieve high rotational efficiency despite its small size.

[0045] The present invention stores thermal energy in a sand-based material 3, and since the wind turbines 8, 81, 85, or 86 and wind power generators 10, 11, or 16 are located within the wind tunnel 6 and wind tunnel front chamber 9, they are less susceptible to damage, are less susceptible to lightning strikes, etc., require less frequent replacement, and the cost of materials used to store heat is low, making construction and maintenance costs low. Furthermore, power generation is possible even with weak winds inside the wind tunnel 6, and the installation site can be located adjacent to a demand area, which can help reduce power transmission costs. It has the advantage of being able to be implemented effectively, with a low investment amount relative to the amount of power generated. [Explanation of symbols]

[0046] 1 sand container 2 Sand container installation part 3 Sand base material 4 Upper opening 5 Lower opening 6 Wind tunnel 71 Wind inlet 72 Wind inflow chamber 73 Wind flow inlet cover 8, 81, 85, 86 windmill 9 Wind tunnel front room 10, 11, 15, 16 Wind turbines 12 Drainage / dust removal section 13, 14 Wind tunnel front chamber opening 17 Heat exchanger 18 Heater

Claims

1. A sand base material including silica sand, silica sands, or sands; a wind tunnel having an upper opening and a lower opening; a sand container disposed around a side wall of the wind tunnel and containing the sand base material; a wind tunnel front chamber having a wind inlet and connected to the wind tunnel; A wind turbine installed in the wind tunnel and / or in the wind tunnel front room; a wind power generator connected to and driven by the wind turbine, The sand base material is stored as heat energy obtained by at least one of heating methods including heating by a heater from external power such as surplus power, heating by a heat conductor, heating by a heat exchanger, warm heating by a steam pipe, dry steam heating, and solar radiation heating; When electric power is required from the outside, the windmill is driven by an updraft of air volume related to the temperature difference between the inside and outside of the air in the wind tunnel, the height difference of the position of the opening of the wind tunnel, and the effective area of ​​the opening of the wind tunnel, which is caused by the heat energy stored in the sand base material and the temperature rise of the air in the wind tunnel, and the updraft of air volume related to the temperature difference between the inside and outside of the air in the wind tunnel, the height difference of the position of the opening of the wind tunnel, and the effective area of ​​the opening of the wind tunnel. A sand thermal storage type wind power generation device, characterized in that electricity is generated by the wind power generator which is driven in conjunction with the wind turbine.

2. The sand base material is heated by a heater using electricity generated by the wind power generator. The heat is stored as thermal energy obtained by at least one of heating using a heater from external power such as surplus power, heating using a thermal conductor, heating using a heat exchanger, warm heating using a steam pipe, dry steam heating, or solar radiation heating; 2. The sand thermal storage type wind power generation device according to claim 1, characterized in that, when electric power is required externally, the thermal energy stored in the sand base material can be output to the outside by the heat exchanger or the thermal conductor.

3. The sand thermal storage type wind power generation device according to claim 1, characterized in that the wind turbine is a horizontal axis wind turbine or a vertical axis wind turbine, and has at least one of a limit load fan, a turbine type wind turbine, a Bernoulli theorem type wind turbine, a propeller type wind turbine, a cell wing type wind turbine, a multi-blade type wind turbine, a Magnus type wind turbine, a Darrieus type wind turbine, a Savonius type wind turbine, a Gyaromill wind turbine, a cross-flow wind turbine, a Sirocco fan, a turbo fan, a line fan, or an S-type wind turbine.

4. The front wind tunnel chamber opening of the front wind tunnel chamber has a lid portion, The lid portion is provided to cover a part of the front wind tunnel chamber and be openable and closable, the wind tunnel front chamber opening can be kept closed by the lid except when the wind turbine or the wind power generator is installed or maintained, The front chamber of the wind tunnel has an air inlet, an air inlet chamber, and an air inlet cover on an upper side thereof, The height of the air inlet is set so as to be able to prevent the inflow of water and dust from the outside, and the air inlet cover of the air inlet can be opened and closed to adjust the amount of air inflow, and is set so as to allow air to flow in from the outside as necessary; The wind tunnel front chamber has an air inlet on a side surface and a drainage and dust removal section on a lower surface, The air inlet on the side is set to allow air to flow in from the outside as needed, 2. The sand thermal storage type wind power generation apparatus according to claim 1, wherein the drainage and dust removal section is configured to be capable of draining water and removing dust.

Images