JPH04179868A - Wind power and solar heat combined power generation method and device - Google Patents

Abstract

PURPOSE:To improve the recovery efficiency of energy by increasing eddy circulation with eddy draft in an air duct through a disc driven by the rotation of a wind mill and with solar heat on the wall of the air duct to collect circulated eddy draft as rotating power. CONSTITUTION:By the rotation of a wind mill 18 exposed to wind, a disc 34 which is installed in an air duct 10 is rotated and driven to create an eddy in the air duct 10. The eddy is subjected to heat from the wall of the air duct 10 exposed to solar heat so that heat is taken in the eddy. The eddy in the air duct 10 has a core expanded by centrifugal force and heat absorption to enforce eddy circulation. The enforced eddy circulation and the throttle effect of the air duct 10 accelerates a main flow in the air duct 10 and increases blast energy so that a turbine 36 installed on the outlet side of the air duct 10 is rotated with high energy to develop power. It is thus possible to efficiently recover energy.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a wind/solar thermal combined power generation method and device, and in particular, a power generation method and device that can effectively combine wind and solar power to obtain a large total power, and that can be applied to power generation equipment, etc. Regarding equipment.

[Conventional technology]

In recent years, global environmental destruction due to the generation of carbon dioxide gas due to the large-scale combustion of coal and petroleum-based fossil fuels has become a problem.In addition to energy conservation, natural energy sources (solar heat, wind power, wave power, ocean energy, etc.) are being used as countermeasures. ) is being considered. In particular, research on combined power generation using solar thermal energy and wind power is seen as promising. Natural energy on the earth is generally widely distributed and has the advantage of being available everywhere, but on the other hand, its disadvantages are that its energy density is small, regionally unevenly distributed, and highly variable over time, making it difficult to use industrially. It is said that the utility value is small. To compensate for these shortcomings, there are two points: (1) expansion of the total capacity through a combined system, and (2) a control system for energy storage, etc. to eliminate temporal fluctuations in generated power. The present invention mainly relates to a power generation method and device related to (1). - For boat fishing, solar energy and wind power have a complementary relationship locally, which is advantageous for equalizing the generated power. As a conventional facility of this kind, an experimental facility jointly constructed by the German government and a Spanish electric power company is known. This facility is a hybrid solar/wind power generation plant, and has a structure in which the ground plane is covered with a plastic sheet similar to greenhouse cultivation, and a chimney is erected above it. In such equipment, the lower part of the sheet is heated to a maximum of 20 degrees Celsius by solar heat,
The idea is to generate an updraft inside the chimney so that the heated air blows up from the bottom of the chimney to the top, and to use the updraft to rotate a turbine installed inside the chimney (NIKKEI MECHAICAL 1983).
．． 411).

[Problem to be solved by the invention]

However, in the conventional method described above, since the turbine is directly driven by the wind energy of the updraft generated by air heating, sufficient power cannot be absorbed, and the energy recovery efficiency is extremely low. In addition, the heating capacity must be increased to generate strong updrafts.
There is a problem in that it requires a vast site area and imposes a large burden on equipment. The present invention focuses on the above-mentioned conventional problems, and aims to provide a wind/solar thermal combined power generation method and device that can achieve higher energy recovery and extremely reduce the burden on equipment.

[Means to solve the problem]

In order to achieve the above object, the wind/solar power combined power generation method according to the present invention includes solar heating of the wind tunnel wall while ventilation is generated in the wind tunnel as a vortex by a blade wheel driven by the rotation of the wind turbine. Increases vortex circulation,
The structure is such that the ventilation force of this circulating vortex is extracted as rotational power. Further, the wind/solar combined power generation device according to the present invention includes:
A rotary impeller connected to a wind turbine is arranged in a wind tunnel, and the wind tunnel wall is formed of a solar heat absorbing film, and the exit side of the wind tunnel receives a vortex flow generated by the rotary impeller and whose vortex circulation is increased by solar heat. The structure is equipped with an output impeller that is rotated by

[Effect]

According to the above configuration, when the wind turbine rotates in response to the wind, the blade wheel installed in the wind tunnel is driven to rotate, and a swirling flow is generated in the wind tunnel. This swirling flow is heated by the wind tunnel wall, which receives solar heat, and heat is absorbed into the swirling flow. The core of the swirling flow in a wind tunnel expands due to its centrifugal force and heat absorption, which strengthens the vortex circulation. This enhanced vortex circulation and wind tunnel throttling effect accelerates the mainstream inside the wind tunnel, increasing the energy of the blast, and the output impeller installed at the exit of the wind tunnel is rotated with high energy, making it possible to obtain power. be. Next, the present invention will be explained in detail. A. Principle of energy enhancement of vertical spiral flow by heating The principle of energy enhancement of vertical spiral flow in combination with a vertical axis wind turbine is as follows. The following equation holds true for a complete fluid swirl flow with a change in entropy S. DI'/Dt=f Tds --- (1) Integration is performed for any closed curve. However, F: circulation of vertical spiral flow, t1 time, T: absolute temperature. Next, when calculating the increase in entropy of a perfect fluid due to heat transfer heating, the entropy is: ds= dQ/T (where Q is the amount of heating)...
(2) According to the first law of thermodynamics, dQ = dE + pdV (where E, internal energy, p; pressure, ■, specific volume)... (3) The equation of state is p = Rρ ( (4) where ρ (=1/V) is the density and R is the gas constant. Therefore, from the above equations (2), (3), and (4), Tds=dQ=dE+RdT−dp/ρ, and the following equation obtained by integrating this becomes the increase in entropy. f Tds= f dE+RJ dT-f (dp/ρ
)=-F(dp/ρ) ・・・・・・(5) On the other hand, in the case of adiabatic compressed flow without heating, S=constant, ρ=
Since it is constant, Dr/Dt=0, so r=constant and the circulation is constant and conserved, and there is no enhancement of circulation. The equation of motion and hot water temperature of vertical spiral flow are v”/r=
(1/ρ)・(dp/dr) ・−・(6)ζ=
It can be expressed as (1/r)·δ(rv)/δr (7). However, p is pressure, ■ is circumferential velocity, ζ is hot water temperature, and r is radius. From the above equations (1), (5), and (6), the temporal change in hot water circulation is given by the following equation. DF/Dt=-f f (v'/r)dr-dθ ・
...(8) Integral range is θ=θ~2π, r=oo~
It is 0. By the way, as shown in FIG. 4, the vortex cross section consists of a forced vortex (I) at the center and a free vortex (II) at its outer edge, and this is called a Rankine combined vortex. Applying the above idea to this, in the case of a Rankine combinatorial vortex,
Since ζ=constant, the general solution to equation (7) is: (9) where ω=angular velocity and k=F/2π. Therefore, (I) Since ζ = 2ω and r = 2πr2ω in a forced vortex, V-ωr (10) (II) Since ω = 0 in a free vortex, v = r' /
2yr r --- (11). The outer edge (r = a) of the forced vortex constitutes the root of the vortex, and in this case, = a2ω. Here, the temporal change in circulation in the Rankine combination vortex is calculated from equation (8), where 0≦r≧■, Dr”/
Dt= 2yr (f CLI 2rdr+f k2
r-3drl=2πω2 a 2 ・・・・・・(
12) Since the circulation F at r=a is =2yr ωa2, from equation (12), DI” /Dt= (IJ r' , =-・-(13)
The temporal change in the circulation F at the root radius a is as follows: ω = constant, 1 = 0, r , = r , and by integrating equation (13), r'' a = T' oeWI +・+ ・・+
(14) Therefore, ■If there is no rotor, ω=0, so F. = constant and no enhancement of circulation due to heating occurs. ■When the rotational speed of the rotary impeller is large, ω>0, and the circulation r rapidly increases due to heating. For this reason, by generating a vortex and heating it, the circulation of the vortex can be increased and a large rotational torque can be generated. Synergistic effect of energy conversion by B1 combination As mentioned above, the rate of increase in circulation due to heating is proportional to the square of the product of the strength of the root and its radius, so by creating a vortex below the wind turbine and widening the base of this vortex. Increase the radius of the root of the disaster as much as possible,
All you have to do is increase the area that receives heat from the sun. The initial hot water temperature can be determined by using the rotational force of a windmill and increasing the initial temperature by the rotational torque of a blade wheel rotated by the vertical axis of the windmill. By doing this, a large amount of energy can be generated through the synergistic effect of the generation of eddy currents and the circulation enhancement effect caused by heating, and it is possible to continuously perform energy conversion.

【Example】

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the wind/solar combined power generation method and apparatus according to the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment in which the present invention is applied to a power generation device. As shown in the figure, the power generation device according to the embodiment has a wind tunnel 10 that is vertically erected, and is provided with a skirt 12 that is formed to widen at the lower end. The skirt 12 is arranged at a distance from the site surface 14 and forms an air intake port 16 at its outer peripheral end. The wall surface of the wind tunnel 10 including this skirt 12 is formed of a solar heat absorbing film.
By exposing the outside to sunlight, the air introduced inside is heated. The vertically erected wind tunnel 10 has an open upper end, and a vertical rotating shaft 17 is disposed at the center of the wind tunnel 10. A windmill 18 is attached to the As shown in FIG. 3, the wind turbine 18 has a structure in which a plurality of movable blades 20 are attached to the outer periphery of a rotating shaft 17 so as to be movable up and down about an axis parallel to the rotating shaft 17. That is, this windmill 18 has a rotating cylinder 22 that is integrally attached to the vertical rotating shaft 17, and has an inner ring 24 and an outer ring 2 on its outer periphery.
6 are also integrally attached. In such a rotating body, blade support shafts 30 parallel to the vertical rotation axis 17 are provided on the outer ring 28 at equal intervals in the circumferential direction, and the movable blades 20 are attached to these. The movable wing 20 is attached to the wing support shaft 3
The leading edge 20A is mounted so as to stand up from the surface of the cylindrical body including the outer ring 28, and the trailing edge 2OB is simultaneously drawn into the cylindrical body, and the leading edge 2OA side can be moved up and down. It makes it possible. In addition, movable wing 2
A coil spring 32 pivotally attached to the circumferential surface of the rotary cylinder 22 is connected to the trailing edge 2OB of the rotary cylinder 22, and is restrained and supported so that the movable blade 20 follows the circumferential surface of the outer ring 28 in a normal state. There is. Therefore, when no superior pressure is applied, the structure is such that they are aligned along the outer ring 28 in a plan view. When the windmill 18 receives wind, the trailing edge 2OB of the movable blade 20 sinks toward the inner ring 24 against the elastic force of the coil spring 32, and on the contrary, the leading edge 2OA sinks into the circumferential surface of the outer ring 28. I am able to stand up from the ground. On the other hand, a vertical rotation shaft 17 rotated by the windmill 18
The lower end of the shaft is supported on the site surface 14, and a rotary impeller 34 is integrally attached to the lower end of this shaft so that it rotates together with the windmill 18. The rotor wheel 34 is arranged at the joint between the main body part of the wind tunnel 10 and the skirt 12,
Air is sucked in from the air intake port 16 of the skirt 12 by rotation and blown out toward the upper part of the wind tunnel 10, and the blowing flow becomes a vortex flow. That is, the rotary impeller 34 is formed of an impeller for axial flow blowing. For this reason, when the wind turbine 18 is rotated by the wind, the rotary impeller 34 in the wind tunnel 10 is rotationally driven.
As a result, air is taken in through the air intake port 16 of the skirt 12, heated by solar heat, and blown up through the wind tunnel 10 in a whirlpool state. A turbine 36 is attached to the upper end opening of the wind tunnel 10 as an output impeller for receiving the vortex airflow blown up and extracting it as rotational energy. This turbine 36 has a rotating shaft 37 installed concentrically with the vertical rotating shaft 17, and blades are attached to the outer periphery of this rotating shaft 37 so as to cover the wind tunnel opening, and are rotated by the vortex of air blown up. is configured to be and,
A ring gear 40 is provided on the outer periphery of such a turbine 36. Further, a plurality of generators 42 are arranged around the outer periphery of the turbine 36, and the input gear 4 of the generator 42 is
4 and the ring gear 4o are engaged, and the turbine 36
The generator 42 is driven by the rotational power of the motor. In this case, the ring gear 40 and the gear 44 of the generator 42
Instead of using a constant meshing method, a clutch mechanism or the like may be used to adjust the number of startup stages according to the rotational power of the turbine 36. The operation of the power generating device configured in this way is as follows. When the wind turbine 18 located at the top end receives wind from a certain direction, the leading edge 20A of the movable blade 20 stands up in the half where the leading edge 2OA faces the wind direction, and the angle of attack increases due to wind pressure. This generates a rotational moment in the wind turbine 18. At the same time, in the remaining half where the trailing edge 2OB faces the wind direction, the movable blade 20 or the outer ring 2 is moved by the action of the coil spring 32.
The leading edge 2OA sinks along the circumference of the wind turbine 8, and the wind turbine rotation moment in the opposite direction to the wind direction decreases. As a result, the movable blades 20 of the wind turbine 18 always operate to increase the rotational power according to the wind direction, and the rotational resistance due to the blades can be reduced. When the windmill 18 is rotated in this way, the vertical rotation axis 1
A rotary impeller 34 attached to the lower part of the wind tunnel 10 is driven to rotate through the rotary impeller 7 , outside air is taken in from the air intake port 16 of the skirt 12 , and air flows in from the circumferential direction through the guide vanes of the rotary impeller 34 . Converts the flow into a powerful magekonryu. Since the skirt 12 and the wall surface of the wind tunnel 10 are formed of a solar heat absorbing film, the air flow introduced from the air intake port 16 absorbs heat. As a result, the circulation of the vertical vortex is rapidly strengthened by the heating effect of the magnifying flow, and this is transmitted upstream. The flow that is circulated upward in the wind tunnel 10 is circulated by a turbine 86 disposed at the outlet of the wind tunnel 10.
and rotates it. The rotational power thus obtained drives the generator 42 meshed with the turbine 36, thereby making it possible to obtain powerful electric power.

【Effect of the invention】

As explained above, according to the present invention, a suction vortex is formed by the rotational force obtained by the windmill, and this can be extracted as rotational power while heating the vortex with solar heat to enhance hot water circulation. Therefore, it is possible to obtain a wind/solar thermal combined power generation method and device that can achieve high energy recovery and have an extremely small burden on equipment.

[Brief explanation of drawings]

Fig. 1 is a front view of the power generation device according to the example, Fig. 2 is a plan configuration diagram thereof, Fig. 3 is a plan cross-sectional view of the wind turbine, Fig. 4 is a vortex cross-sectional view, and Fig. 5 is an explanatory diagram of Rankine vortices. It is. 10...Wind tunnel, 12...Skirt, 1
6... Air intake, 17... Vertical rotation axis, 18... Wind turbine, 20... Movable blade,
34... rotor, 36... turbine, 42... generator. Agent Patent Attorney Tomo Murakami - 1st m1 10: Wind cylinder 34: Rotary wheel 12 Niss 1-) 36: Nuhin I6
:Denhachi" L entrance 42 j ll' for the first time (
17I" rotating shaft / 188 wind turbine Figure 2 IJ 3 Figure 4 Figure procedure amendment and 1990 Patent Application No. 306538 2, title of invention Wind-solar combined power generation method and device 3, case of person making amendment Relationship with Patent applicant address Mr. 7, 622 Zushicho, Machida City, Tokyo
Mei 1) Heihachi Part 4, Deputy
Address 5-10-2 Nishiikebukuro, Toshima-ku, Tokyo 171
issue? , Detailed description of the invention in the specification to be amended. ), content of amendment (1), “0≦r≧■” on page 8, line 17 of the specification has been changed to “0
≦r≦X”. that's all

Claims (2)

[Claims] (1) The circulation of the vortex is increased by solar heating the wind tunnel wall while the blade wheel driven by the rotation of the windmill generates a vortex in the wind tunnel, and the ventilation force of the circulating vortex is used as rotational power. A wind/solar power combined power generation method characterized by extracting power from the wind and solar power. (2) A rotary impeller connected to a windmill is placed in a wind tunnel, and the wind tunnel wall is formed of a solar heat absorbing film, and on the exit side of the wind tunnel, vortex circulation is increased by the solar heat generated by the rotary impeller. A wind/solar thermal combined power generation device characterized by installing an output impeller that is rotated by receiving a vortex flow.