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INVENTION
Patent of the Russian Federation RU2230218
WIND POWER PLANT
The name of the inventor: Rybak M.B.
(RU); Koposov A.D.
The name of the patent holder: Koposov Alexander Dmitrievich
Address for correspondence: 119991, Moscow, ul.Stroiteley, 8, building 2, office 824, Law Office "Barshchevsky and Partners", Pat. To S.Selivanovsky
The effective date of the patent: 2002.06.13
The invention relates to wind power, namely to wind turbines that convert wind energy into electrical or other energy for use in industry, agriculture, and the like. The technical result, which consists in increasing the efficiency of the use of wind energy, is provided by the fact that in a wind power plant comprising a turbine mechanically coupled to the generator, a central shell, an annular front shell with an inlet channel forming a small diffuser outlet channel with a central envelope, An outer shell forming a large diffuser-confluent channel with the central shell, and an additional annular shell forming a narrowing-expanding first intermediate channel with the outer surfaces of the anterior and central shells, communicating in the intermediate part with a small diffuser outlet channel, and with the inner surface of the outer shell A second intermediate channel communicating with the first intermediate channel with a large diffuser-confluent channel according to the invention, the turbine mechanically coupled to the generator is located in an intermediate channel formed by the central and additional annular shells.
DESCRIPTION OF THE INVENTION
The invention relates to wind power, namely to wind turbines that convert wind energy into electrical or other energy for use in industry, agriculture, and the like.
A wind power plant is known, comprising a turbine mechanically coupled to a generator, a central shell, an annular front shell with an inlet channel forming a small diffuser outlet channel with a central envelope, an annular outer shell forming a large diffuser-confluent channel with a central envelope, and an additional annular shell Forming with the outer surfaces of the front and central shells a tapered-expanding first intermediate channel communicating in the intermediate part with a small diffuser outlet channel and with the inner surface of the outer shell a second intermediate channel communicating with the first intermediate channel with a large diffuser-confluent channel, On a set of essential features of the invention adopted for the closest analog (prototype) (see, for example, RU, 2124142 C1, cl. F 03 D 1/04, 27.12.1998).
The disadvantage of the wind turbine is the inability to use the unit at low initial airflow rates.
The technical result, which consists in increasing the efficiency of the use of wind energy, is provided by the fact that in a wind power plant comprising a turbine mechanically coupled to the generator, a central shell, an annular front shell with an inlet channel forming a small diffuser outlet channel with a central envelope, An outer shell forming a large diffuser-confluent channel with the central shell, and an additional annular shell forming a narrowing-expanding first intermediate channel with the outer surfaces of the anterior and central shells, communicating in the intermediate part with a small diffuser outlet channel, and with the inner surface of the outer shell A second intermediate channel communicating with the first intermediate channel with a large diffuser-confluent channel according to the invention, the turbine mechanically coupled to the generator is located in the intermediate channel formed by the central and additional annular shells, the inlet channels can be equipped with primary air flow accelerators, The shells of the plant are equipped with additional ejecting and air intake channels.
The channels are equipped with devices for twisting the flow.
The drawing shows a longitudinal section of the installation.
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The wind power plant comprises a central shell 1, an annular front shell 2 with an inlet channel 3. The shell 2 forms a small diffuser outlet channel 4 with the central shell 1. In addition, the power unit has an annular outer shell 5 forming a large diffuser-confluent channel 6 with the central shell 1 The power unit is provided with an additional annular shell 7 forming a narrowing-divergent first intermediate channel 8 forming with the outer surfaces of the front 2 and central 1 shells communicating in the intermediate part with a small outlet diffuser channel 4 and with the inner surface of the outer shell 5 the second intermediate channel 9 Communicating with the first intermediate channel 8 with the large diffuser-confluent channel 6. The installation has a turbine 10 located in the converging-divergent first intermediate channel 8 and mechanically connected to the generator 11 located in the central shell 1. The term "generator" Understand not only the electric current generator, but any device for converting mechanical energy into any kind of energy convenient for use in specific circumstances. This can be, for example, a pump in a hydraulic drive system, an air drive compressor, or the like. At the entrance to channels 3, 8, 9, primary flow accelerators 12 with guide devices are installed to twist (not shown) the flow. The shells 1, 2, 5, 7 and primary accelerators 12 are interconnected by bridges. |
In order to provide additional airflow to the installation channels and give additional acceleration, the shells 2, 5, 7 are provided with additional air intake channels 13, and for creating additional vacuum behind the turbine 10 - ejector channels 14. To increase the efficiency of the turbine 10, the channels 3, 4, 8 And 9 are equipped with devices 15 for swirling the flow.
WIND POWER PLANT WORKS AS FOLLOWING
The free air flow moving along the second intermediate installation channel 9 and the surface of the outer shell 5 of the plant, due to ejection, creates a vacuum in the first intermediate channel 8, the effective zone of the two total flows participating in the vacuum creation being at least one diameter of the bottom cut Installation, i.e., an annular air flow is involved in this process, the largest diameter of which is not less than three diameters of the bottom cut of the installation.
The energy of this stream can be determined with the help of the first law of thermodynamics or calculated from the formula for determining the elastic energy of a gas, or by other known methods.
The air flow entering the inlet section of the channels 3, 8, 9 and the primary accelerators 12 has a certain energy reserve calculated by the known methods.
Under the influence of two energy flows, from the side of the inlet channels and from the side of the rarefaction, the air flow, having passed the minimum section of the channel 8 formed by the central shell 1 and the annular front shell 2, reaches the maximum effective speed and density. That is, the kinetic energy of the flow increases sharply and this process is associated with a decrease in the enthalpy of the flow. Accordingly, as the velocity increases, the pressure in this section decreases, whose value is denoted by P1. This pressure will be lower than the pressure P0 in the free flow. The pressure in the outlet section of channel 9 will be lower than P1. Consequently, two energies act on the air channel 8 - one on the side of the outlet section of the channel 9, the other on the side of the inlet cross-sections of the channels 3, 8, 9. The vectors of the action of these energies on the flow coincide. Interaction of these energies will lead to an increase in the velocity in the output section of the first intermediate channel 8 (calculation of successive Laval nozzles) and a corresponding decrease in the total pressure in this zone. The drop in the total pressure in the outlet section of the air channel 8 is compensated by the high flow rate and the moment of forces acting on the turbine 10 located in the channel 8 mechanically connected to the generator 11. The kinetic energy at the turbine 10 is a disposable work that will be converted into rotation of the turbine 10 and Associated with it electric generators 11. In zones with a reduced wind speed, the power plant is equipped with primary stream accelerators 12 designed for local acceleration of the stream fed into the inlet sections of channels 3, 8 and 9.
The energy conversion processes in the channels of the installation are identical to the processes occurring in the Laval nozzles, and the minimum flow pressure in the working zone of the turbine 10 will be equal to P2 = 0.528 P0 or somewhat higher, depending on the free-flow velocity. Air turbines are operable even with insignificant pressure drops, and the unit will operate at speeds of free air flow Vo = 5 ... 6 m / s.
CLAIM
1. A wind power plant comprising a turbine mechanically coupled to a generator, a central shell, an annular front shell with an inlet channel forming a small diffuser outlet channel with a central shell, an annular outer shell forming a large diffuser-confluent channel with a central shell, and an additional annular Shell forming with the outer surfaces of the front and central shells a tapered-expanding first intermediate channel communicating in the intermediate part with a small diffuser outlet channel and with the inner surface of the outer shell a second intermediate channel communicating with the first intermediate channel with a large diffuser-confluent channel , Characterized in that the turbine, mechanically connected to the generator, is located in the intermediate channel formed by the central and additional annular shells.
2. Wind power plant according to claim 1, characterized in that its input channels are equipped with primary air flow accelerators.
3. Wind power plant according to claim 1 or 2, characterized in that its shells are equipped with additional air intake channels.
4. Wind power plant according to any one of claims 1 to 3, characterized in that its shells are equipped with additional ejection channels.
5. Wind power plant according to any one of claims 1 to 4, characterized in that its channels are equipped with devices for swirling the flow.
print version
Date of publication 02.02.2007gg
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