Method and system for testing sound wave water collection effect of cooling tower

Abstract

The invention discloses a method and system for testing the sound wave water collection effect of a cooling tower, and the method comprises the following steps: installing a sound wave generator and a water collection measuring instrument in the cooling tower, installing an anemograph and an anemoscope at the periphery of the exterior of the cooling tower, and installing a flow sensor and a temperature sensor on a water inlet pipeline and a water outlet pipeline of the cooling tower; starting a sound wave generator, carrying out a single-factor variable test and a multi-factor combination test, monitoring a velocity field, a temperature field and a humidity field of wet air in the cooling tower at the same time, and measuring basic water drop diameter distribution, water yield and water yield; the measured data are preprocessed, and related curves and charts are drawn according to the preprocessed data to display the influence rule of each factor on the water collection performance index; according to the invention, the water collection effect of the cooling tower is comprehensively measured, the water collection performance index can be systematically measured and analyzed, and a scientific basis and an optimization direction are provided for the application of the sound wave water collection technology of the cooling tower.

Description

Technical Field

[0001] The invention relates to the technical field of cooling tower performance testing, and in particular to a method and system for testing the acoustic wave water collection effect of a cooling tower. Background Art

[0002] Cooling towers play a vital role in industrial production. However, the phenomenon of dripping during their operation leads to a large amount of water waste and potential impact on the surrounding environment. As an emerging solution, acoustic wave water collection technology promotes the aggregation and sedimentation of water droplets by arranging an acoustic wave generator inside the cooling tower, thereby reducing the loss of dripping. Its working principle is: using the characteristic that the wavelength of sound waves is smaller than the diameter of water molecules, water molecules vibrate under the action of sound waves, accelerate aggregation and achieve efficient collection. Water molecules form small water droplets under the action of vibration, which are then carried to the top of the tower by air molecules and stably collected.

[0003] Measuring the water collection efficiency of a cooling tower is a key step in evaluating the water collection effect of a cooling tower. The water collection efficiency is usually defined as the ratio of the amount of water actually collected by the cooling tower to the theoretical amount of water lost. Currently, there is no method to accurately measure the water collection efficiency of acoustic waves, and it is impossible to truly reflect the water collection effect inside the cooling tower. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method and system for testing the acoustic water collection effect of a cooling tower, which can comprehensively measure the water collection effect of the cooling tower, and can systematically measure and analyze the water collection performance indicators, providing a scientific basis and optimization direction for the application of the acoustic water collection technology for cooling towers.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect of the present invention, a method for testing the acoustic water collection effect of a cooling tower is provided, comprising the following steps:

[0007] Install an acoustic wave generator, a water collection meter and a wet air distribution meter inside the cooling tower, install an anemometer and a wind vane around the outside of the cooling tower, and install flow sensors and temperature sensors on the water inlet and outlet pipes of the cooling tower;

[0008] With the sonicator turned off, measure the basic droplet diameter distribution, droplet number, and water collection volume;

[0009] Turn on the sound wave generator, conduct single factor variable test and multi-factor combination test, monitor the velocity field, temperature field and humidity field of the wet air in the cooling tower at the same time, and measure the basic water droplet diameter distribution, water collection amount and water collection rate;

[0010] The measured data is preprocessed, and relevant curves and charts are drawn based on the preprocessed data to show the influence of various factors on the water collection performance indicators.

[0011] In some embodiments of the present invention, multiple representative areas are selected inside the cooling tower based on its structure and airflow distribution characteristics to install sound wave generators, and the installation position, angle and initial operating parameters of each sound wave generator are accurately recorded.

[0012] In some embodiments of the present invention, the water collection measuring instrument is installed at a water distribution tank in a cooling tower, and a plurality of the water collection measuring instruments are provided.

[0013] In some embodiments of the present invention, the single factor variable test includes:

[0014] Keeping the operating conditions of the cooling tower unchanged, the position, frequency, intensity and operating mode of the acoustic wave generator are changed individually, wherein the operating modes include continuous operation, intermittent operation and different intermittent periods and duty cycles;

[0015] Keep the start parameters of the acoustic wave generator unchanged, and change the number of circulating water pumps opened and the water inlet temperature of the cooling tower as well as the ambient wind speed and direction separately.

[0016] In some embodiments of the present invention, the multi-factor combination test comprises:

[0017] Combining different frequencies of the sound wave generator with different opening times of the circulating water pump;

[0018] Alternatively, different sound intensities of the sound wave generator are combined with different inlet water temperatures, while considering changes in ambient wind speed and direction.

[0019] In some embodiments of the present invention, the preprocessing of the measured data includes data cleaning, denoising and outlier removal, and a data filtering algorithm is used to remove abnormal data points caused by temporary sensor failure or external interference.

[0020] In some embodiments of the present invention, the water collection rate is the ratio of the actual water collection amount measured by the water collection measuring instrument to the theoretical dripping water loss of the cooling tower, multiplied by 100%.

[0021] In some embodiments of the present invention, based on the test results, a mathematical model between the water collection performance index and various factors is established using statistical methods and regression analysis techniques to analyze the influence of various factors on the water collection effect and their mutual relationship.

[0022] In a second aspect of the present invention, a cooling tower acoustic wave water collection effect testing system is provided, comprising:

[0023] A sound wave generator unit, comprising a plurality of sound wave generators capable of being independently controlled;

[0024] A water collection measuring instrument unit, comprising a plurality of water collection measuring instruments, wherein the water collection measuring instruments adopt a laser water drop spectrometer or a water drop image analyzer;

[0025] A sensor unit, including a flow sensor, a humidity sensor, a temperature sensor, an anemometer, and a wind direction meter;

[0026] The data acquisition and processing unit comprises a data acquisition card, a microprocessor, a storage device and a communication interface. The data acquisition and processing unit is connected to the sound wave generator unit, the water collection measuring instrument unit and the sensor unit respectively.

[0027] In some embodiments of the present invention, a protective shell is provided outside the sound wave generator and the water collection measuring instrument.

[0028] One or more technical solutions of the present invention have the following beneficial effects:

[0029] (1) The method for testing the acoustic water collection effect of a cooling tower provided by the present invention takes into account the influence of the start-up parameters of the acoustic wave generator and the operating parameters of the cooling tower on the water collection effect for testing. By performing single-factor variable testing and multi-factor combination testing, a comprehensive measurement of the water collection effect of the cooling tower is achieved. At the same time, the influence of each parameter on the water collection effect can be analyzed based on the measurement results. The water collection performance indicators can be systematically measured and analyzed, providing a scientific basis and optimization direction for the application of the acoustic water collection technology for cooling towers.

[0030] (2) The test method of the present invention can accurately measure the water collection effect of the cooling tower under different sound wave generator parameters (such as frequency, sound intensity, operating mode), cooling tower operating conditions (number of circulating water pumps turned on, water temperature entering the tower) and environmental factors (wind speed, temperature). By systematically changing these variables and conducting tests, comprehensive and detailed water collection data can be obtained, thereby deeply analyzing the influence of various factors on the water collection effect. This provides a direct and reliable basis for the optimal design of the cooling tower acoustic wave water collection system, helps to accurately adjust the settings of the acoustic wave generator and the operating parameters of the cooling tower, maximizes the water collection effect, effectively reduces the waste of water resources, and reduces the operating costs of the enterprise.

[0031] (3) The test method of the present invention covers tests of various working conditions, and fully considers various situations that may occur in actual operation. Whether it is cooling towers of different sizes, different types of sound wave generators, or complex and changeable environmental conditions, this test method can be applied. This wide adaptability makes the method universal in different industries and different cooling tower application scenarios, and can meet diverse needs, providing strong support for the promotion and application of cooling tower acoustic water collection technology.

[0032] (4) The test method of the present invention uses professional measuring instruments and scientific data processing methods during the test process. The raindrop spectrometer can accurately measure the raindrop spectrum information at different locations, and combine with other high-precision sensors (such as flow sensors, temperature sensors, anemometers, etc.) to accurately monitor relevant parameters to ensure that the collected data is true and reliable. Through the analysis and processing of a large amount of data, the generated test report provides clear and accurate information for technicians and decision makers, enabling them to make reasonable decisions based on scientific data, judge the feasibility and effectiveness of acoustic water collection technology in specific cooling towers, and determine the direction of further improvement.

[0033] (5) The test system of the present invention provides an effective tool for research and innovation in the field of cooling tower acoustic water collection. Through careful analysis and research of different factors, it helps to discover new problems and potential room for improvement, and promote the continuous innovation and development of acoustic water collection technology. For example, new combinations of acoustic wave parameters or cooling tower operation modes may be discovered to further improve water collection efficiency and contribute to the technological progress of the industry.

[0034] (6) The cooling tower acoustic wave water collection effect testing method provided by the present invention calculates the water collection rate based on the measured water collection amount, and reflects the water collection effect through the water collection rate. At the same time, since the water collection measuring instrument is installed inside the cooling tower, compared with the existing testing methods, the test results of the present invention can truly reflect the water collection effect inside the cooling tower.

[0035] (7) The cooling tower acoustic wave water collection effect test system provided by the present invention generates acoustic waves by a set acoustic wave generating unit to achieve the water collection effect in the cooling tower. By changing the frequency, intensity and position of the acoustic wave generator, the influence of the parameters of the acoustic wave generator on the water collection effect can be obtained; by setting flow sensors and temperature sensors on the inlet pipe and outlet pipe of the cooling tower, by changing the number of water pumps turned on, the inlet temperature, the inlet flow rate, the outlet temperature and the outlet flow rate of the cooling tower, the influence of the cooling tower operating parameters on the water collection effect can be obtained; by setting a wind vane and anemometer on the periphery of the cooling tower, the influence of the external environment on the water collection effect of the cooling tower can be obtained; therefore, the system can realize the test of the parameters of the acoustic wave generator, the operating conditions of the cooling tower and the influence of the external environment on the water collection effect, and realize a comprehensive water collection effect test. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the composition of the cooling tower acoustic wave water collection effect test system of Example 2 of the present invention;

[0037] Figure 2 This is a schematic diagram of the distribution of the water collection measuring instrument in the cooling tower according to the second embodiment of the present invention.

[0038] In the figure: 1. Cooling tower; 2. Cooling tower water pool; 3. Cooling tower water distribution pipe; 4. Water pool temperature measuring point; 5. Ground; 6. Ground environmental parameter measuring point; 7. Circulating water inlet temperature measuring point; 8. Sound wave generator; 9. Water collection measuring instrument; 10. Wet air parameter measuring point in the tower; 11. Water distribution trough channel. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Example 1

[0041] In a typical embodiment of the present invention, a method for testing the acoustic water collection effect of a cooling tower is provided, comprising the following steps:

[0042] Step 1: Install an acoustic wave generator, a water collection meter and a wet air distribution meter inside the cooling tower, install an anemometer and a wind vane around the outside of the cooling tower, and install flow sensors and temperature sensors on the inlet and outlet pipes of the cooling tower.

[0043] Specifically, when installing the sound wave generator, multiple representative test areas are selected inside the cooling tower according to its structure and airflow distribution characteristics to install the sound wave generator, and the installation position, angle and initial operating parameters (such as frequency, sound intensity, phase, etc.) of each sound wave generator are accurately recorded. The multiple test areas include the central area of ​​the cooling tower, circumferential areas of different radii, and horizontal areas of at least two different height layers.

[0044] When installing the water collection meter, the water collection meter is installed in the upper space of the water distribution channel in the cooling tower. The water collection meter is specifically installed at least three measuring points near the sound wave generator in the radial direction, at 1 / 2 of the radius of the cooling tower, and at 10 meters near the outer edge. There are multiple water collection meters, which should have fast response, high sensitivity and anti-interference capabilities, can accurately measure the amount of water collected, and transmit data in real time with the data acquisition system through a wireless communication module. The installation position of the water collection meter should cover the influence area and comparison area of ​​the sound wave generator, wherein the comparison area refers to the area far away from the sound wave generator: in the cooling tower, the position far away from the sound wave generator can be used as the comparison area. For example, at the edge corner of the cooling tower or the area on the other side opposite to the plane where the sound wave generator is located. These areas are relatively weakly affected by sound waves, which is in sharp contrast to the area affected by the sound wave generator.

[0045] The water collection measuring instrument uses a laser water drop spectrometer or a water drop image analyzer, which can measure the basic water drop diameter distribution, the number of water droplets and the amount of water collected.

[0046] The wet air distribution measuring instrument includes a temperature sensor, a humidity sensor and an anemometer, which are installed at various locations in the cooling tower as needed to monitor the velocity field, temperature field and humidity field of the wet air in the cooling tower.

[0047] High-precision flow sensors and temperature sensors are installed on the water inlet and outlet pipes of the cooling tower to accurately measure the flow and temperature changes of water in and out of the tower. Anemometers and wind vanes are installed around the outside of the cooling tower to monitor the ambient wind speed and direction.

[0048] After installation, all installed sensors and measuring instruments are fully calibrated and debugged to ensure their measurement accuracy and data transmission stability, and the basic parameters of the cooling tower (such as model, size, designed cooling water volume, fan specifications, etc.) and on-site environmental parameters (such as atmospheric pressure, humidity, air temperature, etc.) are recorded.

[0049] Step 2: With the acoustic wave generator turned off, measure the basic water droplet diameter distribution, the number of water droplets, and the amount of water collected.

[0050] Step 3: Turn on the sound wave generator and conduct single-factor variable tests and multi-factor combination tests. At the same time, monitor the velocity field, temperature field and humidity field of the humid air in the cooling tower, and measure the basic water droplet diameter distribution, water droplet number, water collection volume and water collection rate.

[0051] Before turning on the sonic generator, record the environmental parameters of the cooling tower operation, including water inlet temperature, air inlet humidity, flow rate, etc. At the same time, ensure that the power and frequency parameter settings of the sonic generator are consistent with the actual operating conditions.

[0052] Wherein, the single factor variable test includes:

[0053] Keep the operating conditions of the cooling tower (such as the flow rate, head, water temperature entering the tower, ambient wind speed and wind direction of the circulating water pump) unchanged, and change the position, frequency, intensity and operation mode of the sound wave generator separately, where the operation mode includes continuous operation, intermittent operation and different intermittent cycles and duty cycles. Specifically, first test the frequency of the sound wave generator. Starting from the preset lowest frequency, gradually increase the frequency with a certain frequency step. Under each frequency setting, let the sound wave generator run stably for a period of time. During this period, the data acquisition system records the water collection data of the special water collection measuring instrument, the water flow and temperature data of the inlet and outlet tower, and the wind speed and direction data of the anemometer and wind vane in real time. After completing the frequency test, keep other parameters unchanged, and conduct a similar test on the sound intensity of the sound wave generator. The sound intensity step can be set to 3dB-10dB, and the sound intensity is changed in turn and the corresponding data is recorded. Finally, the operation mode of the sound wave generator (such as continuous operation, intermittent operation and its different intermittent cycles and duty cycles) is tested, and data is collected after each mode runs stably for a period of time.

[0054] Alternatively, keep the start parameters of the acoustic wave generator unchanged, and change the number of circulating water pumps started and the water inlet temperature of the cooling tower as well as the ambient wind speed and direction separately.

[0055] Specifically, the parameters of the sonic generator are fixed, and the operating conditions of the cooling tower are adjusted and tested. The number of circulating water pumps turned on is changed (for example, switching from single pump operation to dual pump operation), and after a period of stable operation (45 minutes to 1.5 hours) under the new operating conditions, the data of the dedicated water collection meter, flow sensor, temperature sensor, anemometer and wind vane are collected. Next, the inlet water temperature is adjusted to different set values ​​(such as changing within a certain temperature range in steps of 1°C), and stable operation is performed at each inlet water temperature and relevant data is recorded. Different environmental wind speed and wind direction conditions are simulated using natural wind or by fans (such as wind speed changes within a certain wind speed range in steps of 0.5m / s, and wind direction changes within the range of 0°-360° in steps of 15°), and tests and data collection are performed for each wind speed and wind direction combination.

[0056] The multi-factor combination test includes:

[0057] Combining different frequencies of the sound wave generator with different opening times of the circulating water pump;

[0058] Alternatively, different sound intensities of the sound wave generator are combined with different inlet water temperatures, while considering changes in ambient wind speed and direction.

[0059] Specifically, based on actual operating conditions and experience, select representative combinations of factors for testing. For example, combine different frequencies of the sound wave generator with different opening numbers of the circulating water pump, or combine different sound intensities of the sound wave generator with different water temperatures entering the tower, while considering changes in ambient wind speed and direction. After each combination has been running stably for a period of time (such as 1 hour), collect relevant data from the dedicated water collection meter, flow sensor, temperature sensor, anemometer and wind vane through the data acquisition system to study the impact of the interaction between various factors on the water collection effect.

[0060] Step 4: Preprocess the measured data, and draw relevant curves and charts based on the preprocessed data to show the influence of various factors on the water collection performance index.

[0061] Specifically, the measured data is preprocessed including data cleaning, denoising and outlier removal. At the same time, a data filtering algorithm (such as a Kalman filter algorithm or a wavelet transform filter algorithm) is used to remove abnormal data points caused by temporary sensor failure or external interference to ensure the quality and reliability of the data.

[0062] The water collection performance index is calculated based on the measured data, where the water collection rate is calculated as follows: actual water collection volume / theoretical drip loss of cooling tower × 100%; the water collection volume is the total water volume obtained by adding the measured data of the water collection measuring instrument, and taking into account the water collection area in the tower represented by each water collection measuring instrument.

[0063] Use data analysis software (such as MATLAB or Excel) to draw various curves and charts, such as the curve showing the change of water collection rate with the frequency of the acoustic generator, the curve showing the change of water collection volume with the water temperature entering the tower, and the three-dimensional surface diagram of the water collection effect under different combinations of factors, so as to intuitively show the influence of various factors on the water collection performance indicators.

[0064] According to the test results, statistical methods (such as variance analysis, correlation analysis) and regression analysis techniques are used to establish a mathematical model between the water collection performance index and various factors (such as the mathematical model between the water collection performance index and the parameters of the acoustic wave generator, the operating conditions of the cooling tower and environmental factors), quantitatively analyze the influence of various factors on the water collection effect and their mutual relationship, and determine the key influencing factors and their optimal value range.

[0065] Generate a detailed test report based on the data analysis results, including the test purpose, test method, test data summary, water collection performance index calculation results, analysis of the impact of various factors on water collection effect, conclusions and suggestions, etc. The report should be presented in a clear and easy-to-understand manner to provide comprehensive and accurate information for technicians and decision makers so that they can evaluate the application effect of acoustic water collection technology in the cooling tower and make reasonable decisions.

[0066] The test results are applied to the optimization and improvement of the cooling tower acoustic water collection system. Based on the best parameter combination and operating conditions obtained through analysis, the settings of the acoustic generator (such as the adjustment of frequency, sound intensity, position and operating mode) and the operation management of the cooling tower (such as the control strategy of the circulating water pump and the adjustment of the water temperature entering the tower) are optimized to improve the water collection effect, reduce water resource waste and environmental impact, and achieve efficient operation and sustainable development of the cooling tower.

[0067] The water collection performance of the cooling tower is evaluated based on the test results, including:

[0068] Calculate the increase in water collection rate under the action of sound waves: (water collection rate when the sound waves are turned on - water collection rate when the sound waves are turned off) / water collection rate when the sound waves are turned off;

[0069] Calculate the absolute increase in the amount of water collected by the sound wave;

[0070] Evaluate the improvement of the overall water loss of cooling towers by using the acoustic wave water collection effect.

[0071] Implementation method 1: Taking the effect of the frequency of the acoustic wave generator on the water collection effect as an example, the specific steps are as follows:

[0072] (1) In the cooling tower, select positions with radii of 3m, 6m, and 9m in the horizontal direction, and evenly arrange 6 special water collection measuring instrument measuring points on the circumference corresponding to each radius; and install special water collection measuring instruments at the corresponding positions.

[0073] The temperature sensors were installed in the inlet and outlet pipes of the cooling tower and in the environment 10m away from the cooling tower. The anemometer was installed 20m upwind of the cooling tower. The acoustic wave generator parameter measuring instrument was connected to the 6 installed acoustic wave generators. The data acquisition system was connected to all measuring instruments and debugged normally. The initial acoustic wave generator frequency was set to 1000Hz, the sound intensity to 120dB, the circulating water pump was turned on as a single pump, the inlet water temperature was 30℃, the ambient wind speed was 2m / s, and the ambient temperature was 25℃.

[0074] (2) Conduct a single factor test, i.e., a sound wave generator frequency test, and change the sound wave generator frequency to 1200 Hz, 1500 Hz, and 1800 Hz in sequence. After each frequency change, keep other conditions unchanged and run stably for 1 hour. The data acquisition system records the water collection volume of each dedicated water collection measuring instrument.

[0075] (3) Sort the collected data and remove obviously abnormal data points. Calculate the water collection volume for each frequency value.

[0076] Implementation method 2: Taking the effect of the position of the acoustic wave generator on the water collection effect as an example, the specific steps are as follows:

[0077] (1) The layout of the special water collection measuring instrument is the same as that of the first embodiment. The initial sound wave generator frequency is set to 1300 Hz, the sound intensity is 130 dB, the circulating water pump is turned on, the water temperature at the inlet tower is 32 ° C, the ambient wind speed is 3 m / s, and the ambient temperature is 26 ° C.

[0078] (2) A single factor test, namely the acoustic wave generator position test, was conducted. First, the acoustic wave generator was changed from a radius of 4 m to 6 m and 8 m from the center of the tower. After each position change, it was allowed to run stably for 45 minutes and data from a dedicated water collection meter was collected.

[0079] (3) After preprocessing the data, draw the water collection curve at different distances from the center of the tower.

[0080] Implementation method 3: Take the effect of testing the frequency of the acoustic wave generator and the number of circulating water pumps on water collection as an example:

[0081] (1) The layout of the dedicated water collection measuring instrument is the same as that of the first embodiment. The initial sound wave generator frequency is set to 1100 Hz, the sound intensity is 125 dB, the tower water temperature is 31 ° C, the ambient wind speed is 2.5 m / s, and the ambient temperature is 24 ° C.

[0082] (2) Conduct the following combined tests:

[0083] Combination 1: The frequency is 1100 Hz, single pump is running, and data is collected after 1.5 hours of stable operation.

[0084] Combination 2: The frequency is 1400 Hz, single pump is running, and data is collected after 1.5 hours of stable operation.

[0085] Combination 3: The frequency is 1100 Hz, dual pumps are running, and data is collected after 1.5 hours of stable operation.

[0086] Combination 4: The frequency is 1400 Hz, dual pumps are running, and data is collected after 1.5 hours of stable operation.

[0087] (3) After sorting the data, a mathematical model between the water collection volume, frequency, and the number of circulating water pumps turned on was established using multivariate regression analysis. The analysis found that there was an interaction between the frequency and the number of circulating water pumps turned on. When the frequency was low (1100Hz), the water collection effect of dual pump operation was less improved than that of single pump operation; when the frequency was high (1400Hz), dual pump operation could significantly improve the water collection effect. According to the analysis results, the optimal matching scheme between the frequency of the acoustic wave generator and the number of circulating water pumps turned on under different working conditions can be determined according to the actual operation requirements of the cooling tower to achieve the optimal water collection effect.

[0088] Example 2

[0089] In a typical embodiment of the present invention, a cooling tower acoustic wave water collection effect test system is provided, comprising:

[0090] The sound wave generator unit includes multiple independently controllable sound wave generators; each sound wave generator has precise frequency, sound intensity and phase adjustment functions. The shell of the sound wave generator is made of corrosion-resistant and high-temperature resistant materials, with good waterproof, dustproof and heat dissipation performance. The interior adopts efficient sound wave emission devices and stable power amplifier circuits, which can operate stably in the harsh environment of the cooling tower and generate a uniform and stable sound wave field.

[0091] The water collection meter unit includes a plurality of water collection meters, which use a laser raindrop spectrometer or an image analyzer to measure the basic water droplet diameter distribution, the number of water droplets and the amount of water collected. The water collection meter is equipped with a low-power wireless communication module (such as Bluetooth, ZigBee or Wi-Fi), which can transmit the measurement data to the data acquisition system in real time. It also has battery power monitoring and automatic sleep wake-up functions to extend the battery life and ensure long-term reliable operation in the humid environment at the bottom of the cooling tower.

[0092] The sensor unit includes a flow sensor, a temperature sensor, an anemometer and a wind vane; wherein,

[0093] Flow sensor: installed on the inlet and outlet pipes of the cooling tower, it adopts high-precision electromagnetic flowmeter or ultrasonic flowmeter technology, with a measurement accuracy of within ±0.3%. It has a wide range ratio and good temperature adaptability, and can accurately measure the flow changes of water in and out of the tower, and transmit the data to the data acquisition system via wired or wireless means.

[0094] Temperature sensor: Use high-precision platinum resistance temperature sensor or thermocouple temperature sensor, installed in the cooling tower inlet and outlet pipes and key positions inside the cooling tower. The measurement accuracy is within ±0.2℃, the response time is less than 2s, and it can feed back water temperature and ambient temperature change data to the data acquisition system in real time.

[0095] Anemometer and wind vane: Using advanced ultrasonic anemometer and wind vane or three-cup anemometer and wind vane, the measurement accuracy is ±0.1m / s and ±3° respectively, which can quickly and accurately measure the changes in ambient wind speed and wind direction, and transmit the data to the data acquisition system.

[0096] The data acquisition and processing unit comprises a data acquisition card, a microprocessor, a storage device and a communication interface. The data acquisition and processing unit is connected to the sound wave generator unit, the water collection measuring instrument unit and the sensor unit respectively.

[0097] Specifically, the data acquisition card has multiple analog and digital signal acquisition channels, which can simultaneously collect signals from water collection meters, flow sensors, temperature sensors, anemometers and wind vanes, and convert them into digital signals for transmission to the microprocessor. The microprocessor uses a high-performance embedded processor, which is responsible for real-time processing, storage and preliminary analysis of the collected data, such as data caching, filtering, packaging and other operations. The storage device uses a large-capacity solid-state hard drive (SSD) or a high-speed SD card for long-term storage of test data. The communication interface includes a wired Ethernet interface and a wireless communication module (such as a 4G or 5G module), which can transmit the processed data in real time to a remote server or a local computer for further analysis and processing, and can also receive remote control instructions to realize remote monitoring and parameter adjustment of the test system. The data acquisition and processing unit is also equipped with a human-computer interaction interface (such as a display screen and buttons) to facilitate on-site operators to perform system settings, data viewing and status monitoring and other operations.

[0098] When the components of the cooling tower acoustic wave water collection effect test system provided in this embodiment are installed in the cooling tower, Figure 1 and Figure 2As shown, the sound wave generator 8 is installed above the water distribution trough channel 11 in the cooling tower 1, and the water collection measuring instrument 9 is installed in the influence area and the comparison area of ​​the sound wave generator 8 as needed. A temperature sensor is installed at the water pool temperature measuring point 4 in the cooling tower water pool 2; an anemometer and a wind vane are installed at the ground environmental parameter measuring point 6 on the ground 5; a temperature sensor is installed at the circulating water inlet temperature measuring point 7 on the cooling tower water distribution pipe 3; a temperature sensor, a humidity sensor and an anemometer are installed at the wet air parameter measuring point 10 in the cooling tower, which are used to measure the humidity distribution, temperature distribution and velocity distribution of the wet air in the cooling tower.

[0099] In this embodiment, a protective shell is provided on the outside of the sound wave generator, the water collection measuring instrument and the humid air measuring instrument to protect the sound wave generator, the water collection measuring instrument and the humid air measuring instrument from the harsh environment inside the cooling tower. The protective device includes a waterproof, anti-corrosion and anti-impact structure which is an existing structure, and the material of the protective device has fireproof performance.

[0100] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A cooling tower acoustic wave water collection effect testing method, characterized in that: The following steps are involved: Install an acoustic wave generator, a water collection meter and a wet air distribution meter inside the cooling tower, install an anemometer and a wind vane around the outside of the cooling tower, and install flow sensors and temperature sensors on the water inlet and outlet pipes of the cooling tower; With the sonicator turned off, measure the basic droplet diameter distribution, droplet number, and water collection volume; Turn on the sound wave generator, conduct single factor variable test and multi-factor combination test, monitor the velocity field, temperature field and humidity field of the wet air in the cooling tower at the same time, and measure the basic water droplet diameter distribution, water droplet number, water collection amount and water collection rate; The measured data is preprocessed, and relevant curves and charts are drawn based on the preprocessed data to show the influence of various factors on the water collection performance indicators.

2. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: According to the structure and airflow distribution characteristics of the cooling tower, several representative areas are selected to install acoustic wave generators, and the installation position, angle and initial operating parameters of each acoustic wave generator are accurately recorded.

3. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: The water collection measuring instrument is installed at the water distribution tank in the cooling tower, and a plurality of the water collection measuring instruments are provided.

4. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: The single factor variable test includes: Keeping the operating conditions of the cooling tower unchanged, the position, frequency, intensity and operating mode of the acoustic wave generator are changed individually, wherein the operating modes include continuous operation, intermittent operation and different intermittent periods and duty cycles; Keep the start parameters of the acoustic wave generator unchanged, and change the number of circulating water pumps started and the water inlet temperature of the cooling tower as well as the ambient wind speed and direction separately.

5. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: The multi-factor combination test includes: Combining different frequencies of the sound wave generator with different opening times of the circulating water pump; Alternatively, different sound intensities of the sound wave generator are combined with different inlet water temperatures, while considering changes in ambient wind speed and direction.

6. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: The preprocessing of the measured data includes data cleaning, denoising and outlier removal. At the same time, a data filtering algorithm is used to remove abnormal data points caused by short-term sensor failures or external interference.

7. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: The water collection rate is the ratio of the actual water collection measured by the water collection measuring instrument to the theoretical dripping water loss of the cooling tower, multiplied by 100%.

8. The cooling tower acoustic wave water collection effect testing method according to claim 1, characterized in that: According to the test results, the mathematical model between water collection performance index and various factors was established by using statistical methods and regression analysis techniques, and the influence degree and mutual relationship of various factors on the water collection effect were analyzed.

9. A cooling tower acoustic wave water collection effect test system, used to implement the cooling tower acoustic wave water collection effect test method according to any one of claims 1 to 8, characterized in that: include: A sound wave generator unit, comprising a plurality of sound wave generators capable of being independently controlled; A water collection measuring instrument unit, comprising a plurality of water collection measuring instruments, wherein the water collection measuring instruments adopt a laser water drop spectrometer or a water drop image analyzer; A sensor unit, including a flow sensor, a humidity sensor, a temperature sensor, an anemometer, and a wind direction meter; The data acquisition and processing unit comprises a data acquisition card, a microprocessor, a storage device and a communication interface. The data acquisition and processing unit is connected to the sound wave generator unit, the water collection measuring instrument unit and the sensor unit respectively.

10. The cooling tower acoustic wave water collection effect testing system according to claim 9, characterized in that: A protective shell is arranged outside the sound wave generator and the water collection measuring instrument.

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