A natural ventilation cooling tower wind power generation system and method

Abstract

The present invention relates to the field of wind power generation, and provides a natural ventilation cooling tower wind power generation system and method, the system includes: a natural ventilation cooling tower, a wind power generation device and a control device; the wind power generation device includes a wind wheel, a generator cabin and a tower, the wind wheel is installed in the wind outlet area of ​​the natural ventilation cooling tower, and the generator cabin and the tower are both installed outside the natural ventilation cooling tower; the wind wheel rotates due to the hot air flow in the wind outlet area of ​​the tower, and the generator cabin is used to convert the mechanical energy generated by the rotation of the wind wheel into electrical energy; the control device is used to determine the energy range corresponding to the electrical energy output by the generator cabin, and send the electrical energy output by the generator cabin to the target power consumption end according to the energy range. The solution provided by the present invention can generate electrical energy by utilizing the hot air flow in the wind outlet area of ​​the tower of the natural ventilation cooling tower by reasonably installing the wind power generation device on the natural ventilation cooling tower, thereby realizing stable and efficient power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a natural ventilation cooling tower wind power generation system and method. Background Art

[0002] A cooling tower is a tower structure in which the exhaust gas from the low-pressure cylinder of a steam turbine is cooled by circulating water, and the circulating water is collected in the tower for heat exchange with the air. The heat is exchanged with the cold air entering from the bottom and then discharged into the atmosphere. For a natural ventilation cooling tower, after the cold air outside the tower enters the tower body, it absorbs the heat lost by evaporation and contact of hot water, and the temperature increases, the humidity increases, and the density decreases. The air outside the tower has a low temperature, low humidity, and high density. Due to the difference in air density inside and outside the tower, a pressure difference is generated inside and outside the air inlet, causing the air outside the tower to flow into the tower continuously without the need for ventilation machinery to provide power.

[0003] A wind power generation system is a system that uses natural wind in the installation environment to generate electricity. It can convert wind energy into electrical energy to power electrical equipment. However, traditional wind power generation systems are generally set up in open outdoor environments, and the power generation is relatively unstable due to the influence of external wind speed.

[0004] Therefore, how to coordinate the traditional wind power generation system with the natural ventilation cooling tower to improve the stability of power generation has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] The present invention provides a natural ventilation cooling tower wind power generation system and method, which are used to solve the defect that the power generation of the traditional wind power generation system in the prior art is relatively unstable due to the influence of external wind speed.

[0006] In one aspect, the present invention provides a natural ventilation cooling tower wind power generation system, comprising: a natural ventilation cooling tower, a wind power generation device and a control device;

[0007] The wind power generation equipment comprises a wind wheel, a generator cabin and a tower, wherein the wind wheel is installed in the wind outlet area of ​​the natural ventilation cooling tower, the generator cabin and the tower are both installed outside the natural ventilation cooling tower, the wheel shaft of the wind wheel extends to the outside of the natural ventilation cooling tower and is connected to the generator cabin, and the generator cabin is connected to the tower;

[0008] The wind wheel is rotated by the hot air flow in the wind outlet area of ​​the tower, and the generator cabin is used to convert the mechanical energy generated by the rotation of the wind wheel into electrical energy;

[0009] The control device is connected to the generator compartment, and is used to determine an energy range corresponding to the electric energy output by the generator compartment, and send the electric energy output by the generator compartment to a target power consumption end according to the energy range.

[0010] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the natural ventilation cooling tower comprises:

[0011] The tower body has a fresh air inlet on its side wall near the bottom of the tower body, and fresh air outside the tower body enters the tower body through the fresh air inlet;

[0012] A water collection tank is arranged at the bottom of the tower body, and a drainage outlet is arranged on one side of the water collection tank;

[0013] A cooling filler is arranged in the middle and lower area of ​​the tower body;

[0014] A sprayer is arranged inside the tower body and above the cooling filler, the water inlet of the sprayer extends to the outside of the tower body, the hot water sprayed by the sprayer passes through the cooling filler and then exchanges heat with the fresh air entering through the fresh air inlet, and water droplets generated by the heat exchange enter the water collection tank;

[0015] The dehumidifier is arranged inside the tower body and located above the sprayer. The hot air flow generated by the heat exchange is cooled by the cooling filler and dehydrated by the dehumidifier before being discharged from the air outlet area in the tower above the dehumidifier.

[0016] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the wind power generation equipment is provided with two groups, and the two groups of wind power generation equipment are symmetrically arranged on both sides of the natural ventilation cooling tower;

[0017] The wind wheels of the two groups of wind power generation equipment are arranged vertically, and the two groups of wind wheels are arranged opposite to each other.

[0018] According to the natural ventilation cooling tower wind power generation system provided by the present invention, there are multiple wind wheels, and the multiple wind wheels are arranged horizontally;

[0019] The plurality of wind wheels are all mounted in the wind outlet area of ​​the tower via a mounting platform, and the axles of the plurality of wind wheels extend to the outside of the natural ventilation cooling tower and are all connected to the generator cabin.

[0020] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the blades of the plurality of wind wheels are all facing the bottom of the natural ventilation cooling tower; or, the blades of the plurality of wind wheels are all facing the top of the natural ventilation cooling tower.

[0021] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the generator cabin includes a plurality of gearboxes and a plurality of generators, the plurality of generators are all connected to the control device, and the gearboxes and generators are in one-to-one correspondence with the wind wheel;

[0022] The wheel shaft of each wind wheel is connected to the gearbox, and the gearbox is connected to the generator.

[0023] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the system further comprises a wind speed sensor, the wind speed sensor is installed in the wind outlet area in the tower, and the wind speed sensor is connected to the control device;

[0024] The wind speed sensor is used to collect wind speed data in the wind outlet area of ​​the tower and send the wind speed data to the control device;

[0025] The control device is also used to determine a theoretical lower limit of electric energy based on the wind speed data, and to generate and issue an early warning message when it is determined that the electric energy output by the generator compartment is lower than the theoretical lower limit of electric energy.

[0026] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the control device determines the theoretical lower limit of electric energy according to the wind speed data, including:

[0027] Obtain the lower limit values ​​of historical electric energy corresponding to different wind speed data and establish a sample data set;

[0028] Performing fitting processing on the sample data set to establish a corresponding relationship between the theoretical lower limit value of electric energy and the wind speed data;

[0029] Based on the corresponding relationship and the wind speed data, a theoretical lower limit value of electric energy corresponding to the wind speed data is determined.

[0030] According to the natural ventilation cooling tower wind power generation system provided by the present invention, the wind wheel is made of glass fiber reinforced plastics.

[0031] On the other hand, the present invention further provides a natural ventilation cooling tower wind power generation method, based on any of the above-mentioned natural ventilation cooling tower wind power generation systems, the method comprises:

[0032] The wind wheel is driven to rotate by the hot air flow in the air outlet area of ​​the tower;

[0033] The mechanical energy generated by the rotation of the wind wheel is converted into electrical energy through the generator cabin;

[0034] The energy range corresponding to the electric energy output by the generator compartment is determined by the control device, and the electric energy output by the generator compartment is sent to the target power consumption end according to the energy range.

[0035] The natural ventilation cooling tower wind power generation system and method provided by the present invention are as follows: a wind wheel is installed in the wind outlet area of ​​the natural ventilation cooling tower, a generator cabin and a tower are installed outside the natural ventilation cooling tower, a wheel shaft of the wind wheel extends to the outside of the natural ventilation cooling tower and is connected to the generator cabin, the wind wheel rotates due to the hot air flow in the wind outlet area of ​​the tower, the generator cabin is used to convert the mechanical energy generated by the rotation of the wind wheel into electrical energy, a control device is used to determine the energy range corresponding to the electrical energy output by the generator cabin, and the electrical energy output by the generator cabin is sent to the target power consumption end according to the energy range. By reasonably installing the wind power generation equipment on the natural ventilation cooling tower, the hot air flow in the wind outlet area of ​​the natural ventilation cooling tower can be used to generate electrical energy, and the rotation of the wind wheel can promote the flow of air in the natural ventilation cooling tower, thereby achieving stable and efficient power generation, solving the problem of unstable power generation of traditional wind power generation systems, and improving power generation reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of a natural ventilation cooling tower wind power generation system provided by an embodiment of the present invention;

[0038] Figure 2 is a structural schematic diagram of a natural ventilation cooling tower in an embodiment of the present invention;

[0039] Figure 3 It is one of the structural schematic diagrams of the wind power generation equipment in the embodiment of the present invention;

[0040] Figure 4 This is the second structural schematic diagram of the wind power generation equipment in the embodiment of the present invention;

[0041] Figure 5 is a structural schematic diagram of a steering box in an embodiment of the present invention;

[0042] Figure 6 It is a schematic flow chart of a natural ventilation cooling tower wind power generation method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Combine the following Figures 1 to 6 The detailed scheme of the natural ventilation cooling tower wind power generation system and method provided by the embodiments of the present invention is described.

[0045] Figure 1 It is a structural schematic diagram of a natural ventilation cooling tower wind power generation system provided by an embodiment of the present invention.

[0046] like Figure 1 As shown, the natural ventilation cooling tower wind power generation system provided by the embodiment of the present invention specifically includes: a natural ventilation cooling tower 101, a wind power generation device 102 and a control device 103.

[0047] The wind power generation equipment 102 includes a wind wheel 1021, a generator cabin 1022 and a tower 1023. The wind wheel 1021 is installed in the wind outlet area of ​​the natural ventilation cooling tower 101. The generator cabin 1022 and the tower 1023 are both installed outside the natural ventilation cooling tower 101. The axle of the wind wheel 1021 extends to the outside of the natural ventilation cooling tower 101 and is connected to the generator cabin 1022. The generator cabin 1022 is connected to the tower 1023.

[0048] The wind wheel 1021 rotates due to the hot air flow in the wind outlet area of ​​the tower, and the generator cabin 1022 is used to convert the mechanical energy generated by the rotation of the wind wheel 1021 into electrical energy.

[0049] The control device 103 is connected to the generator compartment 1022, and the control device 103 is used to determine the energy range corresponding to the electric energy output by the generator compartment 1022, and send the electric energy output by the generator compartment 1022 to the target power consumption end according to the energy range.

[0050] The solution provided in this embodiment can generate electricity by utilizing the hot air flow in the air outlet area of ​​the natural ventilation cooling tower by reasonably installing the wind power generation equipment on the natural ventilation cooling tower, and the rotation of the wind wheel can promote the flow of air in the natural ventilation cooling tower, thereby achieving stable and efficient power generation, solving the problem of unstable power generation in traditional wind power generation systems and improving power generation reliability.

[0051] In one embodiment, if Figure 2 As shown, the natural draft cooling tower specifically includes:

[0052] The tower body 201 is provided with a fresh air inlet on a side wall near the bottom of the tower body 201 , and the fresh air outside the tower body 201 enters the interior of the tower body 201 through the fresh air inlet.

[0053] The water collection tank 202 is disposed at the bottom of the tower body 201 , and a drain outlet 203 is disposed on one side of the water collection tank 202 .

[0054] The cooling filler 204 is disposed in the lower middle area of ​​the tower body 201 .

[0055] The sprayer 205 is arranged inside the tower body 201 and is located above the cooling filler 204. The water inlet of the sprayer 205 extends to the outside of the tower body 201. The hot water sprayed by the sprayer 205 passes through the cooling filler 204 and exchanges heat with the new air entering through the new air inlet. The water droplets generated by the heat exchange enter the water collecting tank 202.

[0056] The dehumidifier 206 is arranged inside the tower body 201 and located above the sprinkler 205. The hot air flow generated by the heat exchange is cooled by the cooling filler 204 and dehydrated by the dehumidifier 206 before being discharged from the air outlet area in the tower located above the dehumidifier 206.

[0057] in, Figure 2 The black arrows in the figure indicate the direction of air flow, and the white arrows indicate the direction of hot water flow.

[0058] The function of the cooling tower is to cool the exhaust gas of the low-pressure cylinder of the steam turbine by circulating water, and then the circulating water enters the tower to exchange heat with the air, and then discharges the heat into the atmosphere after exchanging the heat with the cold air entering from the bottom. One of the ways of heat exchange between water and air in the cooling tower is that the air flowing over the water surface directly contacts the water, and the heat in the water is transferred to the air through contact heat transfer and evaporative heat dissipation. The cooling tower using this cooling method is called a wet cooling tower (abbreviated as wet tower). The heat exchange efficiency of the wet tower is high, and the natural ventilation countercurrent wet cooling tower (i.e. natural ventilation cooling tower) is more widely used. The ventilation tube of this type of tower is often in a hyperbolic shape and is cast with reinforced concrete.

[0059] In order to meet the air flow required for hot water cooling, there must be enough pressure difference between the inside and outside of the tower, but the difference in air density between the inside and outside of the tower is limited. Therefore, a tall tower (i.e., tower body) must be built for natural ventilation cooling towers. The air flow velocity of the cooling filler section in the tower is generally 1.0-1.2 m / s. The cooling filler layer is generally set at a height of about 15 meters in the tower body. According to the chimney effect, the higher the chimney is, the more hot air is sucked into the chimney according to the temperature difference between the inside and outside, the greater the total buoyancy it is subjected to, the greater the pressure generated by the buoyancy, and the stronger the smoke exhaust capacity. Based on this, in order to better cool the circulating water, the natural ventilation cooling tower generally has a tower body height of about 150 meters, and the wind speed in the wind outlet area in the middle and upper part of the tower body will reach 3-4 m / s, which can provide a relatively stable wind source for wind power generation equipment.

[0060] In one embodiment, if Figure 3 As shown, there are two groups of wind power generation equipment 102, and the two groups of wind power generation equipment 102 are symmetrically arranged on both sides of the natural ventilation cooling tower 101;

[0061] The wind rotors 1021 of the two groups of wind power generation equipment 102 are both arranged vertically, and the two groups of wind rotors 1021 are arranged opposite to each other.

[0062] In this embodiment, both groups of wind power generation equipment 102 adopt a traditional vertical wind wheel arrangement. The two groups of wind power generation equipment 102 can work simultaneously. Specifically, the two wind wheels 1021 can be driven to rotate by the hot air flow in the air outlet area of ​​the tower, and then the mechanical energy generated by the rotation of the wind wheels 1021 can be converted into electrical energy through their respective corresponding generator cabins 1022. Both generator cabins 1022 are connected to the control device.

[0063] In one embodiment, if Figure 4 As shown, there are multiple wind wheels 1021, and the multiple wind wheels 1021 are arranged horizontally.

[0064] The plurality of wind wheels 1021 are all installed in the wind outlet area of ​​the tower through the mounting platform 301 , and the axles of the plurality of wind wheels 1021 extend to the outside of the natural ventilation cooling tower 101 and are all connected to the generator cabin 1022 .

[0065] In some embodiments, the installation platform 301 may adopt a hollow structure such as a grid or a circular hole to reduce the impact of the installation platform on the air circulation in the natural ventilation cooling tower.

[0066] Specifically, the number of wind wheels 1021 can be reasonably set according to the width of the natural ventilation cooling tower 101. In this embodiment, 2 to 4 wind wheels 1021 can be provided.

[0067] In this embodiment, one or more groups of wind power generation equipment may be provided. In each group of wind power generation equipment, a plurality of wind wheels 1021 are provided. The plurality of wind wheels 1021 are arranged horizontally. Figure 5 A steering box 401 is provided above each wind wheel 1021. Two gear shafts can be set in the steering box 401, namely a first gear shaft 4011 and a second gear shaft 4012. The first gear shaft 4011 is arranged horizontally and connected to the wheel axle of the wind wheel 1021. The second gear shaft 4012 is arranged vertically and meshed with the first gear shaft 4011. The second gear shaft 4012 is connected to the generator cabin 1022 through a transmission rod 402.

[0068] In actual applications, in order to ensure that the installation positions of multiple wind wheels 1021 belonging to the same group of wind power generation equipment are on the same straight line, the sizes of the two gear shafts in the steering box 401 can be adaptively configured according to the actual installation height of the transmission rod 402.

[0069] In one embodiment, the blades of the plurality of wind wheels may all face the bottom of the natural draft cooling tower; or, the blades of the plurality of wind wheels may all face the top of the natural draft cooling tower.

[0070] In this embodiment, in order to ensure that the wind direction generated during the rotation of multiple wind wheels is consistent, it is necessary to make the directions of multiple wind wheels consistent, so as to ensure that the airflow generated during the rotation of the wind wheels can drive the flow of humid air in the tower, so that the cold air at the bottom of the tower body can be better inhaled, and the flow of air in the tower can be promoted, so as to better improve the heat exchange efficiency of the circulating water in the natural ventilation cooling tower, and better play the role of reducing the circulating water temperature.

[0071] At the same time, considering that the low-frequency noise of the wind turbine will affect the surrounding environment, the wind wheel is installed inside the natural ventilation cooling tower. The noise of the wind wheel rotation can be well blocked and absorbed by the tower body, thereby achieving the effect of noise reduction.

[0072] In addition, due to the chimney effect, the natural ventilation cooling tower is not affected by external wind and the operation of the unit. Except for the maintenance period of the wind turbine, the wind power generation equipment can generate electricity all day long. The wind power generation equipment has a high number of available hours, and the power generation stability and efficiency are improved. In practical applications, the electricity generated by the wind power generation equipment can be used to supply power for the power plant, and can also be connected to the grid for external sales.

[0073] In one embodiment, the generator cabin includes multiple gearboxes and multiple generators, the multiple generators are all connected to the control device, and the gearboxes and the generators correspond to the wind wheels one by one.

[0074] The axle of each wind wheel is connected to a gearbox, and the gearbox is connected to a generator.

[0075] It is understandable that the gearbox is one of the key components connecting the wind rotor and the generator. Its main function is to convert the low-speed, high-torque mechanical energy generated by the rotation of the wind rotor into high-speed, low-torque mechanical energy to match the generator. The gearbox uses a series of different gears to adjust the speed and torque of the output end within a certain range while ensuring the operating efficiency and reliability of the wind turbine. The generator can further convert the mechanical energy transmitted by the gearbox into electrical energy, thereby achieving the purpose of wind power generation.

[0076] In one embodiment, the above-mentioned natural ventilation cooling tower wind power generation system may further include a wind speed sensor, which is installed in the air outlet area of ​​the tower and is connected to the control device.

[0077] The wind speed sensor is used to collect wind speed data in the wind outlet area of ​​the tower and send the wind speed data to the control device.

[0078] The control device is also used to determine the theoretical lower limit of electric energy based on wind speed data, and to generate and issue a warning message when it is determined that the electric energy output by the generator compartment is lower than the theoretical lower limit of electric energy.

[0079] In this embodiment, one or more wind speed sensors may be installed. When multiple wind speed sensors are installed, the control device may average the wind speed data in the wind outlet area of ​​the tower collected by each wind speed sensor, and then determine the theoretical lower limit of electric energy based on the average wind speed value.

[0080] In one embodiment, the control device determines the theoretical lower limit of electric energy according to the wind speed data, specifically including:

[0081] The first step is to obtain the lower limit value of historical electric energy corresponding to different wind speed data and establish a sample data set.

[0082] In this step, the wind speed data in the wind outlet area of ​​the tower in different time periods can be collected, and the lower limit value of the historical electric energy corresponding to the wind power generation equipment in the corresponding time period can be determined. In practical applications, the lower limit value of the historical electric energy can be obtained based on the collected wind speed data and the theoretical power generation efficiency of the wind power generation equipment under the wind speed data. In some embodiments, the actual power generation of the wind power generation equipment in the time period can also be obtained first, and then the lower limit value of the historical electric energy corresponding to the wind power generation equipment in the time period can be determined based on the actual power generation and the current power generation loss estimate.

[0083] The second step is to fit the sample data set and establish the corresponding relationship between the theoretical lower limit of electric energy and the wind speed data.

[0084] In this step, the wind speed data can be used as the first coordinate axis data, and the lower limit value of electric energy can be used as the second coordinate axis data to establish a two-dimensional coordinate system. Each sample data in the sample data set can be input into the two-dimensional coordinate system to obtain a series of discrete data points. Finally, the discrete data points are fitted to obtain a relationship curve between the lower limit value of electric energy and the wind speed data, that is, the corresponding relationship.

[0085] In some embodiments, before the fitting operation, outliers in the discrete data points may be removed, for example, data points with large value fluctuations may be removed, to ensure the accuracy and reliability of the data during the fitting process.

[0086] When the number of discrete data points is small, data expansion can be performed based on the current discrete data points to ensure the fullness of the data volume before the fitting operation, thereby improving the fitting effect.

[0087] The third step is to determine the theoretical lower limit of electric energy corresponding to the wind speed data based on the corresponding relationship and wind speed data.

[0088] In this step, after the corresponding relationship is obtained, when the wind speed data is known, the theoretical lower limit value of electric energy corresponding to the current wind speed data can be directly determined according to the corresponding relationship.

[0089] In one embodiment, the wind wheel can be made of glass fiber reinforced plastic. Considering the high humidity in the natural ventilation cooling tower, if the material is not properly selected, the wind wheel is easily damaged by corrosion in the hot and humid environment, which affects the service life. Therefore, in this embodiment, the wind wheel is made of glass fiber reinforced plastic, which can play a better role in corrosion and moisture resistance, improve the durability of the wind wheel, and further improve the operating stability of the entire natural ventilation cooling tower wind power generation system.

[0090] In one embodiment, the energy range corresponding to each power consumer can be determined according to the type of the power consumer, and each energy range does not overlap or has a small amount of numerical overlap. When there is a small amount of numerical overlap in each energy range, the power consumption priority of each power consumer can be set, and when the computer output from the generator compartment falls into the overlapped range, the target power consumer can be determined according to the power consumption priority.

[0091] In one embodiment, the wind power generation equipment adopts a variable pitch wind power generation equipment, and the above-mentioned natural ventilation cooling tower wind power generation system can also include a wind speed sensor, which is installed in the wind outlet area of ​​the tower and is connected to the control device.

[0092] The wind speed sensor is used to collect wind speed data in the wind outlet area of ​​the tower and send the wind speed data to the control device.

[0093] The control device is also used to compare the wind speed data with a preset wind speed threshold. If the wind speed data is higher than the preset wind speed threshold, a first control instruction is sent to the variable pitch controller so that the variable pitch controller adjusts the current pitch angle of the wind rotor to a rated pitch angle.

[0094] If the wind speed data is lower than or equal to the preset wind speed threshold, the generator speed value in the generator compartment is determined according to the wind speed data, and the generator speed value is compared with the speed setting threshold. If the generator speed value is higher than the speed setting threshold, and the higher value exceeds the preset upper limit, a second control instruction is issued to the engine controller, so that the engine controller controls the generator in the generator compartment to adjust from the current generator speed value to the speed setting threshold. The sum of the speed setting threshold and the preset upper limit is less than or equal to the speed upper limit of the generator.

[0095] In this embodiment, the wind speed data in the wind outlet area of ​​the tower is detected, and two schemes are adopted to deal with different wind speed conditions. When the wind speed is high, the pitch angle of the wind wheel is controlled by variable pitch control, thereby achieving safe regulation of the generator speed while ensuring the safety of regulation.

[0096] When the wind speed is low, by directly and effectively controlling the generator speed, it is possible to avoid the problem of the generator speed being too fast and the generator overloading due to the wind speed in the air outlet area of ​​the tower being too high, thereby improving the working safety of the generator and further improving the working stability of the entire natural ventilation cooling tower wind power generation system.

[0097] In one embodiment, the above-mentioned natural ventilation cooling tower wind power generation system may further include a distance measuring sensor, which is installed in the air outlet area of ​​the tower and is connected to the control device.

[0098] The distance measuring sensor is used to detect the straight-line distance value between the wind rotor blades and the inner wall of the tower body, and send the straight-line distance value to the control device.

[0099] The control device is also used to compare the straight-line distance value with a preset distance threshold, and when the straight-line distance value is lower than the preset distance threshold, generate and send an early warning message to the management terminal.

[0100] Considering that the wind rotor blades may deform or shift during high-speed rotation, if the wind rotor blades are too close to the inner wall of the tower body, a safety accident of the wind rotor hitting the inner wall of the tower body may occur. To this end, this embodiment monitors the straight-line distance between the wind rotor blades and the inner wall of the tower body in real time, and when the straight-line distance is lower than the preset distance threshold under the safety range, a warning message is promptly sent to the management terminal, so as to promptly remind the management personnel to pay attention to the safety hazards caused by the close distance between the wind rotor and the inner wall of the tower body. If necessary, the management personnel can intervene and adjust in time to ensure the safe operation of the wind power generation equipment.

[0101] Based on the same general inventive concept, the present invention also protects a natural ventilation cooling tower wind power generation method. The natural ventilation cooling tower wind power generation method provided by the present invention is described below. The natural ventilation cooling tower wind power generation method described below and the natural ventilation cooling tower wind power generation system described above can be referenced to each other.

[0102] Figure 6 It is a schematic flow chart of a natural ventilation cooling tower wind power generation method provided by an embodiment of the present invention.

[0103] like Figure 6 As shown, the natural ventilation cooling tower wind power generation method provided in the embodiment of the present invention can be performed by the natural ventilation cooling tower wind power generation system provided in the above embodiments. The method specifically includes the following steps:

[0104] Step 510: The wind wheel is driven to rotate by the hot air flow in the air outlet area of ​​the natural ventilation cooling tower.

[0105] Step 520: Convert the mechanical energy generated by the rotation of the wind wheel into electrical energy through the generator cabin.

[0106] Step 530: Determine the energy range corresponding to the electric energy output by the generator compartment through the control device, and send the electric energy output by the generator compartment to the target power consumption end according to the energy range.

[0107] In one embodiment, the natural ventilation cooling tower wind power generation system further includes a wind speed sensor, which is installed in the air outlet area of ​​the tower and is connected to the control device.

[0108] The above-mentioned natural ventilation cooling tower wind power generation method may further include:

[0109] The wind speed data in the wind outlet area of ​​the tower is collected by the wind speed sensor and sent to the control device.

[0110] The control device determines the theoretical lower limit of electric energy according to the wind speed data, and generates and issues a warning message when it is determined that the electric energy output by the generator compartment is lower than the theoretical lower limit of electric energy.

[0111] In one embodiment, determining the theoretical lower limit of electric energy according to wind speed data specifically includes:

[0112] Obtain the lower limit values ​​of historical electric energy corresponding to different wind speed data and establish a sample data set.

[0113] The sample data set is fitted to establish the corresponding relationship between the theoretical lower limit of electric energy and the wind speed data.

[0114] Based on the corresponding relationship and the wind speed data, a theoretical lower limit value of electric energy corresponding to the wind speed data is determined.

[0115] In summary, the natural ventilation cooling tower wind power generation method provided by the embodiment of the present invention is to install the wind wheel in the wind outlet area of ​​the natural ventilation cooling tower, so that the wind wheel rotates due to the hot air flow in the wind outlet area of ​​the tower, and the generator compartment is used to convert the mechanical energy generated by the rotation of the wind wheel into electrical energy. The control device is used to determine the energy range corresponding to the electrical energy output by the generator compartment, and send the electrical energy output by the generator compartment to the target power consumption end according to the energy range. By reasonably installing the wind power generation equipment on the natural ventilation cooling tower, the hot air flow in the wind outlet area of ​​the natural ventilation cooling tower can be used to generate electrical energy, and the rotation of the wind wheel can promote the flow of air in the natural ventilation cooling tower, thereby achieving stable and efficient power generation, solving the problem of unstable power generation of traditional wind power generation systems, and improving power generation reliability.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A natural ventilation cooling tower wind power generation system, characterized in that: include: Natural draft cooling towers, wind power generation equipment and control equipment; The wind power generation equipment comprises a wind wheel, a generator cabin and a tower, wherein the wind wheel is installed in the wind outlet area of ​​the natural ventilation cooling tower, the generator cabin and the tower are both installed outside the natural ventilation cooling tower, the wheel shaft of the wind wheel extends to the outside of the natural ventilation cooling tower and is connected to the generator cabin, and the generator cabin is connected to the tower; The wind wheel is rotated by the hot air flow in the wind outlet area of ​​the tower, and the generator cabin is used to convert the mechanical energy generated by the rotation of the wind wheel into electrical energy; The control device is connected to the generator compartment, and is used to determine an energy range corresponding to the electric energy output by the generator compartment, and send the electric energy output by the generator compartment to a target power consumption end according to the energy range; The system further comprises a wind speed sensor, which is installed in the wind outlet area of ​​the tower and is connected to the control device; The wind speed sensor is used to collect wind speed data in the wind outlet area of ​​the tower and send the wind speed data to the control device; The control device is also used to determine the theoretical lower limit of electric energy according to the wind speed data, and generate and issue a warning prompt message when it is determined that the electric energy output by the generator compartment is lower than the theoretical lower limit of electric energy; The control device determines the theoretical lower limit value of electric energy according to the wind speed data, including: obtaining the historical lower limit values ​​of electric energy corresponding to different wind speed data, and establishing a sample data set; The sample data set is fitted to establish a corresponding relationship between the theoretical lower limit of electric energy and the wind speed data; including: using the wind speed data as the first coordinate axis data and the lower limit of electric energy as the second coordinate axis data to establish a two-dimensional coordinate system, inputting each sample data in the sample data set into the two-dimensional coordinate system to obtain a series of discrete data points, fitting the discrete data points to obtain a relationship curve between the lower limit of electric energy and the wind speed data as the corresponding relationship; Based on the corresponding relationship and the wind speed data, determining a theoretical lower limit value of electric energy corresponding to the wind speed data; The control device is also used to compare the wind speed data with a preset wind speed threshold. If the wind speed data is higher than the preset wind speed threshold, a first control instruction is issued to the variable pitch controller so that the variable pitch controller adjusts the current pitch angle of the wind wheel to the rated pitch angle; if the wind speed data is lower than or equal to the preset wind speed threshold, the generator speed value in the generator compartment is determined according to the wind speed data, and the generator speed value is compared with the speed setting threshold. If the generator speed value is higher than the speed setting threshold and the higher value exceeds the preset upper limit value, a second control instruction is issued to the engine controller so that the engine controller controls the generator in the generator compartment to adjust from the current generator speed value to the speed setting threshold; wherein the sum of the speed setting threshold value and the preset upper limit value is less than or equal to the generator speed upper limit value.

2. The natural ventilation cooling tower wind power generation system according to claim 1, characterized in that: The natural draft cooling tower comprises: The tower body has a fresh air inlet on its side wall near the bottom of the tower body, and fresh air outside the tower body enters the tower body through the fresh air inlet; A water collection tank is arranged at the bottom of the tower body, and a drainage outlet is arranged on one side of the water collection tank; A cooling filler is arranged in the middle and lower area of ​​the tower body; A sprayer is arranged inside the tower body and above the cooling filler, the water inlet of the sprayer extends to the outside of the tower body, the hot water sprayed by the sprayer passes through the cooling filler and then exchanges heat with the fresh air entering through the fresh air inlet, and water droplets generated by the heat exchange enter the water collection tank; The dehumidifier is arranged inside the tower body and located above the sprayer. The hot air flow generated by the heat exchange is cooled by the cooling filler and dehydrated by the dehumidifier before being discharged from the air outlet area in the tower above the dehumidifier.

3. The natural ventilation cooling tower wind power generation system according to claim 1, characterized in that: The wind power generation equipment is provided with two groups, and the two groups of wind power generation equipment are symmetrically arranged on both sides of the natural ventilation cooling tower; The wind wheels of the two groups of wind power generation equipment are arranged vertically, and the two groups of wind wheels are arranged opposite to each other.

4. The natural ventilation cooling tower wind power generation system according to claim 1, characterized in that: There are multiple wind wheels, and the multiple wind wheels are arranged horizontally; The plurality of wind wheels are all mounted in the wind outlet area of ​​the tower via a mounting platform, and the axles of the plurality of wind wheels extend to the outside of the natural ventilation cooling tower and are all connected to the generator cabin.

5. The natural ventilation cooling tower wind power generation system according to claim 4, characterized in that: The blades of the plurality of wind wheels are all facing the bottom of the natural ventilation cooling tower; or, the blades of the plurality of wind wheels are all facing the top of the natural ventilation cooling tower.

6. The natural ventilation cooling tower wind power generation system according to claim 4, characterized in that: The generator cabin includes a plurality of gearboxes and a plurality of generators, the plurality of generators are all connected to the control device, and the gearboxes and generators correspond to the wind wheels one by one; The wheel shaft of each wind wheel is connected to the gearbox, and the gearbox is connected to the generator.

7. The natural ventilation cooling tower wind power generation system according to any one of claims 1 to 6, characterized in that: The wind wheel is made of glass fiber reinforced plastic.

8. A natural ventilation cooling tower wind power generation method, characterized in that: Based on the natural ventilation cooling tower wind power generation system according to any one of claims 1 to 7, the method comprises: The wind wheel is driven to rotate by the action of the hot air flow in the air outlet area of ​​the tower; The mechanical energy generated by the rotation of the wind wheel is converted into electrical energy through the generator cabin; The energy range corresponding to the electric energy output by the generator compartment is determined by the control device, and the electric energy output by the generator compartment is sent to the target power consumption end according to the energy range.

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