Mountain-mounted self-suction type wind power generation device and power generation method thereof

Abstract

The invention belongs to the technical field of wind power generation, and particularly relates to a mountainside self-suction type wind power generation device and a power generation method thereof. The solar air heat pipe air duct comprises an air duct, an air duct air inlet and an air duct air outlet, the air duct air inlet is formed in a mountain peak, and the air duct air inlet is formed in a mountain foot; the wind turbine generator set is of a closed structure and comprises a wind turbine generator set air inlet, a wind turbine generator set air outlet and a wind turbine, the wind turbine generator set air outlet is communicated with the air flue air inlet, the wind turbine generator set air inlet is provided with an air gate, and the wind turbine generator set air outlet is communicated with the air flue air inlet. When the air gate is opened, the wind power pushes the wind turbine to rotate, and when the air gate is in the pipe wall, the wind turbine stops rotating.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power generation, and in particular relates to a mountain-side self-priming wind power generation device and a power generation method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, wind turbines are basically open-type, that is, the blades are directly exposed to the air. Among them, the three-blade structure is the most common. Its power output depends entirely on the weather. There is electricity when there is wind, and there is no electricity when there is no wind. Chimney-type wind turbines can be used, but this type of wind turbine has a complex structure, violates the principles of aerodynamics, has a self-contradictory device structure, has a weak power generation capacity, and has a low use value.

[0004] The density of the earth's atmosphere gradually decreases with the increase of altitude, and the atmospheric pressure also gradually decreases with the altitude. If a solar air heat pipe is built between the low altitude and high altitude ends, the gas density in the pipe will decrease, and the airflow will rise along the pipe. If the cross-sectional area of ​​the pipe is large enough, a continuous airflow will be generated in the pipe. Therefore, the airflow can be used to generate heat. Summary of the invention

[0005] To solve the above problems, the present invention proposes a mountain-side self-priming wind power generation device and a power generation method thereof. Relying on the mountain, a solar air heat pipe duct is constructed between the foot of the mountain and the peak, and a closed wind turbine generator is installed at the air inlet of the duct. The high-speed airflow drives the turbine to rotate to generate electricity.

[0006] According to some embodiments, the first solution of the present invention provides a mountain-side self-priming wind power generation device, which adopts the following technical solution:

[0007] A mountain-side self-priming wind power generation device comprises a solar air heat pipe duct and a wind turbine generator set; the solar air heat pipe duct comprises an air duct, an air duct inlet and an air duct outlet, the air duct inlet is arranged on a mountain peak, and the air duct inlet is arranged at the foot of the mountain; the wind turbine generator set adopts a closed structure, comprising a wind turbine generator set inlet, a wind turbine generator set outlet and a wind turbine, the wind turbine generator set outlet is connected to the air duct inlet, and the wind turbine generator set inlet is provided with an air lock door, when the air lock door is opened, the wind force drives the wind turbine to rotate, and when the air lock door is closed, the wind turbine stops rotating.

[0008] As a further technical definition, the wind turbine generator further comprises a turbine rotor and a turbine casing arranged outside the turbine rotor; the turbine rotor comprises a diamond-shaped wind scoop and a disc.

[0009] Furthermore, the diamond-shaped air scoop is arranged on the disc.

[0010] As a further technical limitation, the wind turbine generator also includes a parallel generator and a gearbox connecting the parallel generator and the wind turbine. After the airlock door is opened, the wind drives the wind turbine to rotate, and under the action of the gearbox, the low speed of the wind turbine is converted into a high speed to drive the parallel generator to rotate.

[0011] Furthermore, the parallel generators rotate to obtain alternating current, which is then rectified to obtain direct current to form parallel power outputs, which are then connected to a large power grid via a DC-AC inverter.

[0012] As a further technical limitation, the airlock door realizes the switching of the airlock door opening and closing state under the action of the airlock door motor.

[0013] As a further technical limitation, the airlock door is controlled to be opened when the airlock door motor rotates forward, and is controlled to be closed when the airlock door motor rotates reversely.

[0014] According to some embodiments, the second solution of the present invention provides a power generation method of a mountain-side self-priming wind power generation device, which adopts a mountain-side self-priming wind power generation device provided by the first solution and adopts the following technical solutions:

[0015] A power generation method of a mountain-side self-priming wind power generation device, comprising:

[0016] Based on the sunlight, the air density in the air duct of the solar air heat pipe decreases, the air gate is opened, and the air at the foot of the mountain enters the wind turbine generator set, driving the wind turbine to rotate. The air enters the air duct through the air duct inlet, and the hot air in the air duct flows out from the air duct outlet on the mountain peak under the action of the solar heat pipe heating;

[0017] The wind turbine rotates, driving the wind turbine generator set to generate electricity.

[0018] As a further technical limitation, the airflow at the air inlet of the wind turbine generator set is introduced into the wind turbine through the rotor of the cheek bag nested structure in the wind turbine generator, causing the wind turbine to rotate, and after the speed is changed by the gearbox, the parallel generator rotates to generate electricity.

[0019] As a further technical definition, the power generation of the wind turbine generator set is related to the radius of the wind turbine rotor, the cross-sectional area of ​​the wind duct, and the air density at the wind duct inlet and the wind duct outlet.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention constructs a solar convection channel at both ends of low altitude and high altitude based on the principle of rising thermal air flow, and generates electricity by using wind energy in the channel; it leads low-altitude, high-humidity air to high-altitude peaks, converts water vapor in the air into ice and snow, and changes the climate of the local area; the embedded wind turbine is installed in the wheel cover, and operates safely, without noise, and is environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0023] Figure 1 A schematic diagram of the structure of a mountain-side self-priming wind power generation device in the first embodiment of the present invention;

[0024] Among them, 1. airlock door; 2. turbine casing; 3. turbine rotor; 4. rotor wind scoop. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0029] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances, and they cannot be understood as limitations on the present invention.

[0030] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0031] Embodiment 1

[0032] The first embodiment of the present invention introduces a mountain-side self-priming wind power generation device.

[0033] like Figure 1 The mountainside self-priming wind power generation device shown includes a solar thermal air duct and a wind turbine generator set; wherein the solar thermal air duct includes an air duct inlet, a light-transmitting air duct and an air duct outlet, the air duct inlet is arranged on the mountain peak, and the air duct inlet is arranged at the foot of the mountain; the wind turbine generator set adopts a closed structure, including a wind turbine generator set air inlet, a wind turbine generator set air outlet, a wind turbine, a turbine rotor 3 and a turbine casing 2 arranged on the outside of the turbine rotor 3, the wind turbine generator set outlet is connected to the air duct inlet, and the wind turbine generator set air inlet is provided with an air lock door 1, when the air lock door is opened, the wind force drives the wind turbine to rotate, and when the air lock door pipe wall is closed, the wind turbine stops rotating; the turbine rotor 3 includes a rhombus-shaped wind scoop with a symmetrical structure.

[0034] The diamond-shaped wind scoop in this embodiment is fixed on the inner disc of the rotor; the wind enters from the air inlet and drives the diamond-shaped wind scoop to rotate, and the gearbox and generator are installed on the base outside the wheel cover. When the rotor rotates, the generator can rotate at a high speed to generate electricity.

[0035] In order to enable multiple generators to use one wind duct at the same time and expand the power generation capacity, the generators are connected in parallel after AC rectification. After the AC power output by the generator is rectified into DC power with positive and negative poles, the positive and negative poles are connected separately to form a parallel power output, thereby expanding the capacity, and then connected to the grid through DC-AC inverter.

[0036] In order to arbitrarily control the amount of power generated, an air volume control damper 1 is provided, which can accept power dispatching control instructions under computer control and operate in an automatic power generation control mode.

[0037] The design power calculation process of the turbine generator in this embodiment is as follows:

[0038] 1) Design the equivalent cross-sectional area of ​​the turbine rotor scoop

[0039] The air flowing through the turbine flows out through the rotor scoop. Therefore, the rotor scoop part is equivalent to a throttling device for the fluid. The rotor scoop is a throttling link in fluid mechanics, and the size of its cross-sectional area determines the flow rate of the turbine.

[0040] Assume V0 is the maximum flow rate when the duct section has a throttle hole, according to the public fluid flow calculation formula:

[0041]

[0042] Where c is the outflow coefficient (dimensionless), d is the equivalent diameter of the turbine rotor bail, r is the bail radius, and q m Indicates mass flow rate Kg / s, q v Indicates volume flow rate m 3 / s, β represents the ratio of the diameter of the cheek bag throttle hole, d / D is dimensionless, D represents the diameter of the air duct, which is approximately equal to 0 here. ρ represents the density of the fluid Kg / m 3 , δP: pressure difference between inside and outside of the air inlet.

[0043] Then the throttle flow rate V0:

[0044]

[0045] V0 is related to the differential pressure between the inside and outside of the air duct inlet.

[0046]

[0047] When the rotor is stationary, the wind bucket is subjected to the greatest force, so the rotor cannot rotate at high speed. The force per unit area is calculated according to the wind resistance of the object:

[0048] Wp=0.5ρ(V0-V1) 2 ;

[0049] Take the rotor design speed of 15rpm (0.25Hz) as an example, the wind bucket radius is r, the rotor radius is 3r (turbine diameter D = 6r), and the movement distance of the wind bucket center (force center) per second is L (1 / 4 of the arc length of the center movement circle, which is equal to the speed V1):

[0050] L = π·r (V1 = L);

[0051] The wind force F on the rotating wind bucket is:

[0052] F=Wp·S=0.5ρ(V0-π·r) 2 S;

[0053] Where S represents the effective area of ​​a single wind bucket.

[0054] 2) Design and calculate the power of the turbine

[0055] The formula for calculating the output (work, G) per second of the wind bucket in motion is:

[0056]

[0057] Among them, F represents force, unit: kilogram; r represents the radius of the wind bucket, unit: m, meter.

[0058] Considering that the turbine efficiency η is less than 1, the actual turbine output should be multiplied by the efficiency coefficient η.

[0059] like Figure 1 As shown, a turbine generator is installed at the bottom, and the output of the entire unit is calculated based on the wind duct height.

[0060] 3) Determine the power of a single generator

[0061] After determining the output of the turbine, select a generator that matches its power.

[0062] Generator output power: P = G / 102, unit: kW;

[0063] Power is the change of work per unit time, 1 kilowatt (kW) = 102 kg*m / s.

[0064] The duct height, cross-sectional area, turbine size, generator power, etc. can be designed according to different requirements.

[0065] This embodiment relies on the mountain, constructs a wind duct between the foot of the mountain and the peak, installs a closed wind turbine generator at the air inlet of the wind duct, and the high-speed airflow drives the turbine to rotate to generate electricity.

[0066] Embodiment 2

[0067] The second embodiment of the present invention introduces a power generation method of a mountain-side self-priming wind power generation device, which adopts the mountain-side self-priming wind power generation device introduced in the first embodiment.

[0068] A power generation method of a mountain-side self-priming wind power generation device, comprising:

[0069] Based on the sunlight, the air density in the air duct of the solar air heat pipe decreases, the air gate is opened, and the air at the foot of the mountain enters the wind turbine generator set, driving the wind turbine to rotate. The air enters the air duct through the air duct inlet, and the hot air in the air duct flows out from the air duct outlet on the mountain peak under the action of the solar heat pipe heating;

[0070] The wind turbine rotates, driving the wind turbine generator set to generate electricity.

[0071] As one or more embodiments, the rotor of the cheek bag nested structure in the wind turbine generator allows the airflow at the wind turbine generator set air inlet to enter the wind turbine, causing the wind turbine to rotate, and after the gearbox changes speed, the parallel generator rotates to generate electricity.

[0072] As one or more implementation modes, the power generation of the wind turbine generator set is related to the radius of the wind turbine rotor, the cross-sectional area of ​​the wind duct, and the air density at the wind duct inlet and the wind duct outlet.

[0073] The detailed steps are the same as the working principle of the mountain-side self-priming wind power generation device provided in Example 1, and will not be repeated here.

[0074] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A self-priming wind power generation device near a mountain, characterized in that: It includes a solar air heat pipe duct and a wind turbine generator set; the solar air heat pipe duct includes an air duct, an air duct inlet and an air duct outlet, the air duct inlet is arranged on the peak, and the air duct inlet is arranged at the foot of the mountain; the wind turbine generator set adopts a closed structure, including a wind turbine generator set inlet, a wind turbine generator set outlet and a wind turbine, the wind turbine generator set outlet is connected with the air duct inlet, and the wind turbine generator set inlet is provided with an air lock door, when the air lock door is opened, the wind force drives the wind turbine to rotate, when the air lock door is closed, the wind turbine stops rotating.

2. A mountain-side self-priming wind power generation device as claimed in claim 1, characterized in that: The wind turbine generator further comprises a turbine rotor and a turbine housing arranged outside the turbine rotor; the turbine rotor comprises a diamond-shaped wind scoop and a disc.

3. A mountain-side self-priming wind power generation device as claimed in claim 2, characterized in that: The diamond-shaped air scoop is arranged on the disc.

4. A mountain-side self-priming wind power generation device as claimed in claim 1, characterized in that: The wind turbine generator also includes a parallel generator and a gearbox connecting the parallel generator and the wind turbine. After the airlock door is opened, the wind drives the wind turbine to rotate, and under the action of the gearbox, the low speed of the wind turbine is converted into a high speed to drive the parallel generator to rotate.

5. A mountain-side self-priming wind power generation device as claimed in claim 4, characterized in that: The parallel generators rotate to obtain alternating current, which is then rectified to obtain direct current to form parallel power outputs, which are then connected to a large power grid via a DC-AC inverter.

6. A mountain-side self-priming wind power generation device as claimed in claim 1, characterized in that: The air gate realizes the switching of the opening and closing states of the air gate under the action of the air gate motor.

7. A mountain-side self-priming wind power generation device as claimed in claim 1, characterized in that: When the air gate motor rotates forward, the air gate is controlled to be opened, and when the air gate motor rotates reversely, the air gate is controlled to be closed.

8. A method for generating electricity using a self-priming wind power generation device near a mountain, using a self-priming wind power generation device near a mountain as claimed in any one of claims 1 to 7, characterized in that: include: Based on the sunlight, the air density in the air duct of the solar air heat pipe decreases, the air gate is opened, and the air at the foot of the mountain enters the wind turbine generator set, driving the wind turbine to rotate. The air enters the air duct through the air duct inlet, and the hot air in the air duct flows out from the air duct outlet on the mountain peak under the action of the solar heat pipe heating; The wind turbine rotates, driving the wind turbine generator set to generate electricity.

9. A power generation method for a mountain-side self-priming wind power generation device as claimed in claim 8, characterized in that: The rotor of the wind turbine generator with a nested cheek bag structure allows the airflow at the wind turbine generator set air inlet to enter the wind turbine, causing the wind turbine to rotate. After the gearbox changes speed, the parallel generator rotates to generate electricity.

10. A power generation method for a mountain-side self-priming wind power generation device as claimed in claim 8, characterized in that: The power generation of the wind turbine generator set is related to the radius of the wind turbine rotor, the cross-sectional area of ​​the wind duct, and the air density at the wind duct inlet and the wind duct outlet.

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