JP3192427U - Power generation device that combines solar power and wind power - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation device in which solar power generation and wind power generation are combined, which is suitable for installation in a vacant lot existing in an urban area near a city as the urban resident population decreases. SOLUTION: The composite power generation device is a combination of a solar power generation device and a wind power generation device 30, and the solar power generation device includes a plurality of solar power generation panels 12a, 12b, 12c for photoelectric conversion of sunlight. A state in which the light receiving surface of the solar power generation panel is provided with a stand for holding the light receiving surface in the direction in which sunlight is incident, and the solar power generation panel is provided with a gap for air flow between the solar power generation panel and the adjacent solar power generation panel. The wind power generator 30 is a vertical type in which the rotating shaft 34 of the wind turbine 32 is located perpendicular to the ground, and is rotated by the wind passing through the air flow gap of the solar power generation panel. It includes a wind turbine 32 having a plurality of wind receiving members, and a generator 36 that converts the rotational energy generated by the wind turbine 32 into electrical energy to generate electricity. [Selection diagram] Fig. 2

Description

  The present invention relates to a combined power generation device that combines solar power generation and wind power generation, which can generate electric power not only in the daytime but also at night using both solar power generation and wind power generation, particularly in urban areas near cities. The present invention relates to a combined power generation device that combines solar power generation and wind power generation suitable for installation in places with relatively high land prices.

  In recent years, there has been an active movement to reduce the amount of gas that pollutes the atmosphere as a measure against global warming. For example, the Kyoto Protocol has come into effect. In addition, as a special situation in Japan, power supply is tightened due to the shutdown of nuclear power plants due to the Great East Japan Earthquake. Therefore, the establishment of a thermal power plant that uses natural gas as fuel for power supply is being studied. However, in Europe and the United States, pipelines are common for supplying natural gas, but in Japan they are transported as liquefied natural gas by dedicated tankers. The price of this liquefied natural gas is very high due to the effect of the rise in crude oil prices because contracts linked to crude oil prices are common. In Europe and the United States, the price of natural gas due to pipeline transportation has plummeted due to the shale gas revolution, and has fallen below the profitable price of shale gas. However, the price of liquefied natural gas remains largely different from the price of natural gas by pipeline transportation. Accordingly, the use of clean energy instead of energy based on combustion of fossil fuels, in particular, the use of electric power energy created from solar power generation and wind power generation using natural energy is being studied.

  As such a combined power generation device combining solar power generation and wind power generation, for example, in Patent Document 1, a solar power generation device installed on the base of the Yakuradai standing on the foundation and the roof of the Yakuradai And the apparatus comprised with the wind power generator installed in the lower part of a solar power generation device and the battery box installed on the foundation of the bottom part of a Yakura stand is proposed. However, according to such a device, the size of the Yakuradai will increase, so if it is installed in a relatively small place, such as a vacant area in the suburbs of a city, there will be disadvantages such as the right to sunshine and the damage to the landscape. In addition to the possibility of affecting local residents, there is a case where it is necessary to obtain a building confirmation as a premise for the installation work of the combined power generation system, and there is a problem that requires a long period of time for the construction period.

There is also a small independent power supply as proposed in Patent Document 2, for example, but if it is a vacant area in the suburbs of a city, a power line has already been prepared in the vicinity. Considering the above, there has been a problem that the investment efficiency of the power generation facility is low.
Furthermore, for example, by using a power generation evaluation system for actively laying wind power generation means and solar power generation means in a city, as proposed in Patent Document 3, it is possible to cope with different consumption patterns and It is possible to realize simultaneous and suitable operation of wind power generation means and solar power generation means in consideration of facility conditions, and there is also a basic unit model for realizing a smart city concept.

JP 2012-2137039 JP 2008-57428 JP2013-156824A

  The present invention solves the above-mentioned problems, and provides a power generation device that combines solar power generation and wind power generation, which is suitable for installation in a vacant area existing in an urban area near the city as the population living in the urban area decreases. The purpose is to do.

  The combined power generation device of the present invention that achieves the above object is a combined power generation device that combines a solar power generation device 10 and a wind power generation device 30 as shown in FIGS. The apparatus 10 includes a plurality of photovoltaic power generation panels 12 that photoelectrically convert sunlight, and a gantry 20 that holds a light receiving surface of the photovoltaic power generation panel in a direction in which sunlight is incident. At least one sheet is attached to the gantry 20 with a space for air circulation between the adjacent photovoltaic power generation panels, and the wind power generation apparatus 30 has a rotating shaft 34 of a windmill 32 perpendicular to the ground. A wind turbine 32 having a plurality of wind receiving members that are rotated by wind passing through the air flow gap 14 of the photovoltaic power generation panel 12, and rotational energy from the wind turbine 32 is converted into electric energy. Characterized in that it comprises a generator 36 for generating electric power by converting the over.

  In the combined power generation apparatus configured as described above, the solar power generation apparatus generates power by receiving sunlight on the solar power generation panel 12. The gantry 20 is a mechanism for holding the photovoltaic power generation panel 12 in a posture suitable for photovoltaic power generation. The wind turbine generator 30 uses a windmill 32 that is perpendicular to the flow of wind, and the mechanical energy of the windmill 32 is converted into electrical energy by a generator 36. Since the solar power generation panel is mounted on the gantry 20 with the air flow gap 14 provided, the solar power generation panel is disposed so as not to obstruct the wind power generation apparatus 30.

  In the combined power generator of the present invention, the air circulation gap 14 of the photovoltaic power generation panel is preferably between 0.2 and 0.8 m as the gap height V. The gap height V is about four times as large as the inclination angle of the photovoltaic power generation panel 12 when the inclination angle of the photovoltaic power generation panel 12 is 15 degrees as a relation with the size of the opening provided in the photovoltaic power generation panel 12. When the angle is 30 degrees, it corresponds to about twice that. In an area where the wind speed is often in a moderate state of about 3 to 5 m / sec, the air circulation gap 14 is preferably between 0.2 and 0.4 m. When the gap height V is less than 0.2 m, the gap is too small and the power generation efficiency of the wind power generator 30 is lowered. If the gap height V exceeds 0.4 m, since the wind is slow, the power generation amount of the wind power generator 30 does not increase, but the photovoltaic power generator becomes larger and the land use efficiency decreases.

  In an area where the wind speed is relatively strong such as about 10 to 15 m / sec, the gap height V for air circulation is preferably between 0.4 and 0.8 m. When the gap height V is less than 0.4 m, the gap is too small and the power generation efficiency of the wind power generator 30 is reduced. When the gap height V exceeds 0.8 m, the wind is strong and the amount of power generation increases, but the wind turbine of the wind power generator 30 increases in size and the equipment cost increases, and the photovoltaic power generator increases in size and the land use efficiency Decreases.

In the combined power generator of the present invention, preferably, the shape of the windmill 32 is a paddle type, as shown in FIG. 4, for example. By making the windmill shape a paddle type, the startability is high and the rotational speed is low, so that it is suitable for installation in an urban area with safety and low noise.
In the combined power generation device of the present invention, preferably, the shape of the windmill 32 is a Savonius type, for example, as shown in FIG. By making the windmill shape Savonius type, the power generation performance is higher in the drag type, and it is suitable for installation in urban areas with safety and low noise.
In the composite power generation device of the present invention, preferably, the shape of the windmill 32 is a gyromill type, for example, as shown in FIG. When the windmill shape is a gyromill type, since it is a vertical lift type, high power generation performance can be expected without requiring wind direction control, which is suitable for a wide range of power usage applications.

  According to the combined power generation device combining solar power generation and wind power generation according to the present invention, it is possible to increase the rotation efficiency of the windmill while increasing the light receiving efficiency to the solar panel. Even when installed, there is an effect that the business profitability of the power selling business can be improved.

1 is a configuration perspective view showing a preferred embodiment of a combined power generator according to the present invention. FIG. 2 is a side view of the combined power generation apparatus shown in FIG. 1, and particularly shows the wind power generation apparatus 30 in detail. FIG. 2 is a rear view of the composite power generator shown in FIG. 1, particularly showing the bracing portion in detail. It is a block diagram which shows the various shapes of the windmill used for a wind power generator.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Hereinafter, a preferred embodiment of a combined power generation device combining solar power generation and wind power generation according to the present invention will be described with reference to the drawings. FIG. 1 is a structural perspective view showing an embodiment of a combined power generation device combining solar power generation and wind power generation according to the present invention, FIG. 2 is a side view of the combined power generation device shown in FIG. 1, and FIG. It is a rear view of the composite power generator shown in FIG. This composite power generator generally includes a gantry 20 erected on foundations 25a and 25b provided on the ground or a roof of a building, and a solar power generation panel 12 installed on a roof portion of the gantry 20. The wind power generation device 30 installed at the lower part of the solar power generation panel 12 and the power regulator 40 installed on the foundation 25c at the bottom of the gantry 20 are configured.

[Configuration of solar power generator]
As shown in FIGS. 1 to 3, the solar power generation device 10 is combined with a standard output rectangular solar power generation panel 12 as appropriate, and a gap is provided in consideration of power generation by the wind power generation device. is there. For example, when the cell conversion efficiency is 10% to 20% and the height and width are about 1.0 mx 1.6 m, the solar power generation panel 12 has a power generation capacity of about 150 W to 300 W per sheet. In relation to mounting the photovoltaic power generation panel 12 on the gantry 20, for example, in the upper stage, two x4 pieces are arranged as a set in the vertical x horizontal direction, and 0.2 to 0 with respect to the set of adjacent photovoltaic power generation panels 12. Provide a gap of 8m. As for the lower stage, 1 sheet x 4 sheets are arranged as a set in length x width. And the ventilation opening 14 between panels is good to set it as the gap | interval of about 1.0 m of about one panel of the photovoltaic power generation panel 12. FIG.

For example, the panels 12a ₁ , 12a ₂ , 12a ₃ , 12a ₄ positioned at the top of the upper stage of the photovoltaic power generation panel 12 are assembled in this order. Panels 12b ₁ , 12b ₂ , 12b ₃ , and 12b ₄ are assembled in this order on the inter-panel ventilation opening 14 side in the upper stage of the photovoltaic power generation panel 12. Panels 12c ₁ , 12c ₂ , 12c ₃ , 12c ₄ are assembled in this order in the lower stage of the photovoltaic power generation panel 12.
In addition, about the installation number of the photovoltaic power generation panels 12 in the width direction, the case where the four horizontal panels are arranged as one set is shown here, but an appropriate number of three or five or more may be used.

  The inter-panel ventilation opening 14 acts as a gap for air circulation. In an area where the wind speed is often in a moderate state of about 3 to 5 m / sec, the gap height V for air circulation is preferably between 0.2 and 0.4 m. As shown in FIG. 1, the height V of the opening in the vertical direction is related to the dimension H of the opening provided in the photovoltaic power generation panel 12 when the inclination angle of the photovoltaic power generation panel 12 is 15 degrees. Corresponds to about 4 times, and when the inclination angle of the photovoltaic power generation panel 12 is 30 degrees, it corresponds to about 2 times. In regions where there are many relatively strong wind speeds of about 10 to 15 m / sec, the air circulation gap is preferably between 0.4 and 0.8 m. The gap height V for air circulation is set so that air can freely enter from the light receiving surface side of the photovoltaic power generation panel 12 toward the back side thereof. When strong winds or gusts of wind blow up, the possibility that the photovoltaic power generation panel 12 is damaged by being lifted upward is reduced.

Further, the photovoltaic power generation apparatus 10 may be provided with a plurality of sets of photovoltaic power generation panels 12 as shown in FIG. The gap with respect to the set of adjacent photovoltaic power generation panels 12 is preferably set to an appropriate interval so that maintenance work can be easily performed. For example, the width for one worker is 0.8 m to 1.5 m for two people. Between is good.
Here, for example, in the case of installation in Japan, the gantry 20 is provided so that the inclination angle of the photovoltaic power generation panel 12 is about 15 degrees to 30 degrees in consideration of the position of the sun in summer and winter. When the solar power generation panel 12 is installed in a snowy area, the inclination angle of the solar power generation panel 12 is preferably set to a large angle of about 30 degrees so that the snow easily falls from the panel. In snow-free areas, it is recommended to make the angle as shallow as 15 degrees so that the influence of sunlight reflection on the adjacent land is reduced or it is difficult to be affected by strong winds.

[Composition of the frame]
The gantry 20 is preferably made of a metal structural material such as a steel frame, an iron pipe, or an extruded material made of aluminum. For example, in a steel frame or an iron pipe, the weather resistance may be improved by galvanizing. The gantry 20 may have a structure in which the wooden frame construction method is simplified. The height of the gantry 20 is appropriately determined depending on the relationship between the photovoltaic power generation panel 12 and the installation location of the wind power generation apparatus 30, and may be about 1 m at the lowest location of the photovoltaic power generation panel 12. For example, when the wind power generator 30 is installed below the solar power generation panel 12, the height of the gantry 20 needs to be higher than the height of the wind power generator 30. Moreover, when installing the wind power generator 30 adjacent to the solar power generation panel 12, it is good to make it higher than the height of a windmill so that the ventilation of the wind power generator 30 may not be interfered.
The place where the combined power generator is installed is not limited to the gantry 20 shown in FIG. 1, and for example, a certain amount of sunshine can be secured on the roof of a building, under an elevated railway or an elevated highway. It can also be installed in an appropriate building or structure that can secure a certain amount of sunlight and ventilation to the place.

  Next, the detailed structure of the gantry 20 will be described. The gantry 20 has four corners 22, joists 24 located on the foundation side of the pillars 22, girders and rafters 26 located on the roof side of the pillars 22, and braces that reinforce the frame structure. 28. The column portion 22 includes a front column portion 22a having a short height on the front side, and a rear column portion 22b having a high height on the back side. When the inclination angle of the photovoltaic panel 12 is 15 °, for example, the height of the front pillar portion 22a is 1.0 m, the height of the rear pillar portion 22b is 2.0 m, the front pillar portion 22a and the rear pillar portion 22b. Is about 3 to 4 m.

The joist part 24 includes a front joist part 24a on the front side, a rear joist part 24b on the rear side, a right joist part 24c on the left and right sides, a left joist part 24d, and an intermediate joist part for fixing the wind power generator 30. 24e. The longitudinal dimension of the front joist 24a is, for example, about 5 to 6 m. Further, the longitudinal dimension of the rear joist part 24b is, for example, the same as the longitudinal dimension of the front joist part 24a. The front joist part 24a and the rear joist part 24b are supported in a state of floating from the ground by foundations 25a and 25b each having a height of about 0.2 m. The distance between the front joist part 24a and the rear joist part 24b is, for example, about 2.5 to 3.5 m. For the foundations 25a and 25b, for example, a concrete quadrangular frustum shape or a truncated cone-shaped general-purpose product may be used.
The right side joist portion 24c and the left side joist portion 24d constitute a frame structure by connecting the base joists 24a and the base joists 24b of the rear joists 24b, and both ends thereof are connected to the foundations 25a and 25b. Fixed.

  The intermediate joist 24e is provided at the installation position of the wind power generator 30, and both ends of the intermediate joist 24e are fixed to the corresponding positions of the right side joist 24c and the left joist 24d with fixing brackets, respectively. . The intermediate joist portion 24e is preferably connected to the flange portion 39 of the wind power generator 30, and is preferably slightly wider than the flange portion 39. For example, the width is set to about 0.1 m to 0.3 m. A base 23 for supporting the weight of the wind power generator 30 may be provided in the middle of the intermediate joist 24e. For the foundation 23, for example, a concrete quadrangular frustum shape or a truncated cone-shaped general-purpose product may be used.

The girder / rafter portion 26 is a structural material that connects the front pillar portion 22a and the rear pillar portion 22b on the roof side, and is made of, for example, a steel frame or a steel pipe, and supports the photovoltaic power generation panel 12 at a predetermined inclination angle. The girder / rafter portion 26 only needs to be an object that retains strength integrally with a frame member provided in the photovoltaic power generation panel 12. For example, the inter-panel ventilation opening 14 may be held in a frame structure.
The lower girder 26a is a structural member that connects the top end portions of the left and right front column portions 22a. The upper girder 26b corresponds to a purlin and is a structural member that connects the top end portions of the left and right rear column portions 22b. The rafter 26c is a structural member that connects the top end portions of the left and right front column portions 22a and the rear column portions 22b. In Figure 3, between the left and right rafter 26c, the solar panels _{12a 1,} 12a _2, 12a 3, every 12a ₄ in is shown each rafter ₂₆ 1-26 ₈ provided with 2 pcs. By each rafters 26 _{1-26 8,} each photovoltaic panel 12 fixed to the roof side of the frame 20, has a structure to withstand high winds or when snow.

The bracing portion 28 includes front bracing portions 28a ₁ and 28a ₂ made of two steel bars for bracing on the front side, and a right side bracing portion 28b made of two steel bars for bracing on the right side. ₁ , 28b ₂ , back side bracing portions 28c _{1 to} 28c ₂ made of two steel bars for bracing on the back side, and left side bracing portion made of two steel bars for bracing on the left side 28d ₁ , 28d ₂ and roof side bracing portions 28e _{1 to} 28e ₂ made of two steel bars for bracing on the roof side. The front braces 28a ₁ and 28a ₂ are shown in FIG. The right side bracing portions 28b ₁ and 28b ₂ are shown in FIGS. Rear portion brace portion 28C1～28c ₂ and the roof portion brace portion _28e 1 _{~28e 2} is shown in FIG. The left side bracing portions 28d ₁ and 28d ₂ are shown in FIG. The bracing portion 28 may be galvanized steel bar or painted to prevent iron corrosion.

[Configuration of wind power generator]
The wind power generator 30 is a vertical type in which the rotating shaft 34 of the windmill 32 is positioned perpendicular to the ground, and a plurality of wind receiving members that are rotated by the wind that has passed through the air circulation gap of the photovoltaic power generation panel 12. A windmill 32 having power, a generator 36 that generates electric power by converting rotational energy from the windmill 32 into electric energy, a fixed shaft portion 38 provided below the generator 36, and an end portion of the fixed shaft portion 38. A flange portion 39 is provided.
The installation height of the windmill 32 is preferably set to a height suitable for receiving the wind that has passed through the air circulation gap V of the photovoltaic power generation panel 12. The wind power generator 30 is supported by a flange portion 39 fixed to the intermediate joist portion 24e. The wind power generator 30 is preferably provided corresponding to each one of the solar power generation panels 12. For example, in the present embodiment, four units 30 ₁ , 30 ₂ , 30 ₃ , and 30 ₄ are provided in the inter-panel ventilation openings 14. Accordingly, four units are provided in the horizontal direction.

  Here, the windmill may be used as a general-purpose vertical windmill. 4A and 4B are configuration diagrams showing various shapes of a wind turbine used in the wind power generator. FIG. 4A shows a paddle type, FIG. 4B shows a Savonius type, and FIG. 4C shows a gyromill type. These windmill shapes are suitable for installation in urban areas, and are safe and low noise. Further, the paddle type has high startability and is suitable for installation in an urban area.

  Further, as other shapes of the windmill used in the wind turbine generator, a cross flow type, a straight blade type, an S type rotor type, and a Darrie type are known. Compared with those shown in FIG. 4, these shapes are expensive and inferior in terms of power generation efficiency, but the present invention excludes other types of windmill shapes. is not.

The amount of power generated by a vertical wind turbine is determined by the following factors.
(1) The amount of energy obtained from the wind is proportional to the wind receiving area of the windmill. Therefore, since the wind receiving area of the vertical windmill is proportional to the rotor diameter, when the rotor diameter of the windmill is doubled, the wind power obtained is also doubled. In this respect, unlike a horizontal wind turbine, the wind receiving area is different from the square of the rotor diameter.
(2) The amount of energy obtained from the wind is proportional to the air density. The air density varies depending on the atmospheric pressure and the amount of moisture in the air. Usually, the density of air on a flat ground is approximately 1.2 [kg / m ³ ].
(3) The amount of energy obtained from the wind is proportional to the cube of the wind speed. That is, if the wind speed is doubled, the amount of energy obtained from the wind is 8 times, and if the wind speed is tripled, the amount of energy obtained from the wind is 27 times. Therefore, depending on the wind speed, the amount of energy obtained from the wind varies greatly, that is, the output of the wind power generator varies greatly accordingly.

[Configuration of power conditioner]
The power regulator 40 converts the voltage into an appropriate voltage or AC frequency suitable for supplying power to the commercial power system. Charging with a function to prevent the overcharge from occurring in the power regulator 40 by incorporating an appropriate secondary battery so that the output voltage of the photovoltaic power generation panel 12 and the wind power generator 30 is a voltage suitable for charging. A circuit should also be built in. As a power supply destination of the charged secondary battery, a device corresponding to the current capacity of the secondary battery of the power regulator 40 may be used. These devices include, for example, street lights, fish lighting, house lighting, vegetable lighting, etc., fruit farmer damage prevention sensors, anti-theft sensors, road sign lights and safety lights. It is most suitable for power supply to non-electrified areas. When the load requires an AC power supply, a DC-AC conversion circuit is connected to the secondary battery.
In the current power purchase system using natural energy in Japan, the unit price of the power purchase price differs greatly between solar and wind power. Therefore, the power regulator 40 is also preferably configured to supply power to the commercial power system separately for sunlight and wind power.

[Operation of combined power generator]
According to the device configured as described above, power generation by the solar power generation panel 12 is performed in an environment where sunlight in the daytime can be received. Further, when the wind is at an appropriate wind speed, power generation by the wind power generator 30 is performed. In the wind power generator 30, it is important to select an installation location in order to prevent the wind turbine from being installed at all and not being profitable.

The following points are examined as the construction conditions of the wind turbine generator 30.
(1) Strong wind (annual average wind speed of 6m / s or more). Since the amount of energy obtained from the wind is proportional to the cube of the wind speed, it is possible to obtain greater energy if the wind is strong. Even when the wind speed is, for example, a strong wind of 25 m / s or more, the wind power generator as a target of the present invention has a small output.
(2) The transmission line is nearby. When installing a plurality of wind power generators 30, it may be necessary to connect to a power transmission line of an electric power company in order to send electricity generated by the wind power generator 30. When a new transmission line is laid between the windmill and the transmission line, the longer the distance, the higher the cost and the impact on profitability.

  The combined power generation system that combines solar power generation and wind power generation is a power generation system that uses solar power and wind power as energy supply sources, so by using multiple generators with different characteristics, the biased power generation characteristics are averaged. There is merit that can be made. For example, solar power generation plays an active role from spring to autumn when the amount of solar radiation is large, and wind power generation plays an active role during the winter when the average wind speed tends to be short due to insufficient solar radiation. it can. In addition, in cases where the amount of power generated is limited by solar power generation, and the battery tends to discharge, adding a wind power generator will cause large-scale power generation by wind power generation. The battery can be recovered to a charged state, which can contribute to extending the battery life.

  Further, in the combined power generation device combining solar power generation and wind power generation, when the wind power generation device 30 is installed below the solar power generation panel 12, rain and snow are received by the solar power generation panel 12, so It is possible to reduce the influence of rain and snow on the power generation device 30 and extend the life of the device. Moreover, it is preferable that the photovoltaic power generation panel 12 is arranged so as to be hardly affected by snowfall even when snowfalls from an adjacent structure so as to be hardly affected by snowfall.

  The combined power generation apparatus of the present invention can generate electric power not only in the daytime but also at night using both solar power generation and wind power generation, and wind power generation is also possible by providing a ventilation section in the solar power generation panel. As possible, it is suitable for installation in places with relatively high land prices, especially in urban areas near the city.

10 Photovoltaic power generation device 12 Photovoltaic power generation panel 14 Ventilation opening between panels (gap for air circulation)
20 Base 22 Pillar part 24 joist part 25 foundation 26 girder / rafter part 28 bracing part 30 wind power generator 32 windmill 34 rotating shaft 36 generator 38 fixed shaft part 39 flange part 40 power regulator

Claims (5)

A combined power generation device combining a solar power generation device and a wind power generation device,
The photovoltaic power generation apparatus includes a plurality of photovoltaic power generation panels that photoelectrically convert sunlight, and a pedestal that holds a light receiving surface of the photovoltaic power generation panel in a direction in which sunlight is incident, and the photovoltaic power generation panel At least one of these is attached to the gantry in a state where a gap for air circulation is provided between the photovoltaic power generation panel adjacent thereto,
The wind turbine generator is a vertical type in which a rotating shaft of a windmill is positioned perpendicular to the ground, and has a plurality of wind receiving members that rotate by wind passing through an air circulation gap of the photovoltaic power generation panel. A combined power generator comprising: the windmill; and a generator that generates electric power by converting rotational energy generated by the windmill into electric energy. The combined power generator according to claim 1,
The solar power generation panel has a gap height for air circulation between 0.2 and 0.8 m.   The combined power generator according to claim 1 or 2, wherein the windmill has a paddle shape.   The composite power generator according to claim 1 or 2, wherein the wind turbine has a Savonius shape. The composite power generator according to claim 1 or 2, wherein the windmill has a gyromill shape.

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