System for detecting evaporation efficiency of high-efficiency enhanced heat exchange cooler

Abstract

The embodiment of the invention provides a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchange cooler, and belongs to the technical field of heat exchange device performance testing, and the system comprises a spray water supply system which comprises a water tank, a high-pressure pump, a spray pipeline and a plurality of nozzles; the weighing device is arranged below the water tank; the spraying control module is connected with the multiple nozzles; the data acquisition module is connected with the weighing device and the spraying control module; and the calculation module is connected with the data module and used for calculating the actual evaporation loss amount of spraying according to the mass change value, the spraying time and the spraying flow parameters in the unit time and obtaining the evaporation rate in the unit time. According to the system for detecting the evaporation efficiency of the high-efficiency enhanced heat exchange cooler provided by the embodiment of the invention, quantitative, real-time and visual evaluation on the evaporation cooling performance of the high-efficiency enhanced heat exchange cooler can be realized.

Description

Technical Field

[0001] This application relates to the field of heat exchanger performance testing technology, and more specifically, to a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler. Background Technology

[0002] High-efficiency enhanced heat exchange coolers are high-efficiency, multi-mode heat exchange devices designed to achieve energy, water, and land savings. They rely on forced convection and spray evaporation-condensation technology to achieve efficient cooling of medium- and high-temperature working fluids. In high heat flux density heat dissipation applications, the evaporation efficiency of the spray cooling process in high-efficiency enhanced heat exchange coolers, as a highly efficient heat exchange device, has a decisive impact on overall energy efficiency and operational stability.

[0003] The testing methods in related technologies mostly adopt energy conservation estimation, which makes it difficult to accurately quantify actual evaporation behavior under dynamic environmental conditions. Summary of the Invention

[0004] This application provides a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler, aiming to achieve a quantitative, real-time, and visual evaluation of the evaporative cooling performance of the high-efficiency enhanced heat exchanger cooler.

[0005] This application provides a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler, comprising: A spray water supply system includes a water tank, a high-pressure pump, a spray pipeline, and multiple nozzles. The input end of the high-pressure pump is connected to the water tank, and the output end of the high-pressure pump is connected to the spray pipeline. The multiple nozzles are arranged on the spray pipeline. A weighing device is installed below the water tank, and the weighing device is used to periodically measure the change in the mass of water stored in the water tank; A spray control module is connected to multiple nozzles, and the spray control module is used to control the spray duration and spray flow rate of the nozzles; A data acquisition module is connected to the weighing device and the spray control module. The data acquisition module is used to record the mass change value of the water tank, the spraying time of the nozzle, and the spray flow rate parameters in real time. The calculation module is connected to the data module. The calculation module is used to calculate the actual evaporation loss of the spray based on the mass change value per unit time, the spray time and the spray flow rate parameters, and to obtain the evaporation rate per unit time.

[0006] Optionally, the formula for calculating the evaporation rate is: E=Δm / (Q×t) Where E is the evaporation rate, Δm is the amount of water tank mass reduction during spraying, Q is the spray flow rate parameter, and t is the spraying time.

[0007] Optionally, the system further includes: The temperature and humidity monitoring module includes multiple temperature and humidity sensors, which are respectively installed in the spray area of ​​multiple nozzles and the air outlet of the heat exchanger. The data acquisition module is connected to the temperature and humidity monitoring module, and the data acquisition module is also used to acquire the temperature and humidity values ​​of the spray area and the air outlet.

[0008] Optionally, the weighing device includes an electronic balance with a sampling period of 10 seconds.

[0009] Optionally, the spray control module includes multiple solenoid valves and a controller. The solenoid valves are disposed on the spray pipeline and correspond one-to-one with the nozzles. The controller is connected to the multiple solenoid valves and is used to control the opening and closing of the solenoid valves.

[0010] Optionally, the atomization angle of the nozzle is greater than or equal to 60° and less than or equal to 90°.

[0011] Optionally, the system further includes: An infrared thermal imager is installed on one side of the heat exchanger, and the infrared thermal imager is used to scan the surface temperature distribution of the heat exchange tubes in the heat exchanger.

[0012] Optionally, the system further includes: A display module is connected to the calculation module. The display module is used to receive the evaporation rate and display it.

[0013] Beneficial effects: This application provides a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler. A weighing device is installed at the bottom of the water tank to measure the change in water mass during the spraying process in real time. Combined with spray flow rate and duration data, the system calculates the water mist evaporation loss and the evaporation efficiency per unit time based on the mass balance principle. The system uses a spray control module to control spray start / stop and flow rate, and a data acquisition module outputs a unified timestamp signal to synchronize weighing device readings, spray control, and temperature and humidity acquisition. The calculation module generates an evaporation efficiency change curve based on multi-parameter fusion data and, combined with the cooling surface temperature distribution image acquired by an infrared thermal imager, establishes a spatial correlation model between evaporation efficiency and the temperature field, thereby achieving a quantitative, real-time, and visual evaluation of the evaporative cooling performance of the high-efficiency enhanced heat exchanger cooler. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to an embodiment of this application; Figure 2 This is an assembly diagram of a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchange cooler, according to an embodiment of this application. Figure 3 This is a flowchart illustrating the calculation of evaporation rate in a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler, as proposed in one embodiment of this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Reference Figure 1 and Figure 2 As shown in the figure, this application discloses a system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler. The system includes a spray water supply system, a weighing device 4, a spray control module 31, a data acquisition module 5, and a calculation module 6.

[0018] Specifically, the spray water supply system includes a water tank 1, a high-pressure pump 2, a spray pipeline, and multiple nozzles 3. The outlet of the water tank 1 is connected to the inlet of the high-pressure pump 2, and the outlet of the high-pressure pump 2 is connected via the spray pipeline to multiple nozzles 3 arranged above the air inlet surface of the heat exchanger 9. In this way, the high-pressure pump 2 pumps water from the water tank 1 to the nozzles 3 and sprays it onto the heat exchanger 9 in a mist form, thus forming a closed-loop water supply path to ensure stable spray flow and uniform atomization. In this embodiment, the nozzles 3 are tapered atomizing nozzles, and the atomization angle of a single nozzle 3 is greater than or equal to 60° and less than or equal to 90° to ensure uniform droplet distribution.

[0019] Reference Figure 2 As shown, a water receiving tray is provided below the heat exchanger 9 to recover unevaporated water.

[0020] Reference Figure 1and Figure 2 As shown, the weighing device 4 is located below the water tank 1, and is used to periodically measure the change in the mass of water stored in the water tank 1. In this embodiment, the weighing device 4 is an electronic balance, wherein the weighing accuracy of the electronic balance is 0.1g, the sampling period is 10s, and the electronic balance is rigidly connected to the bottom of the water tank 1.

[0021] Reference Figure 1 As shown, the spray control module 31 is connected to multiple nozzles 3. The spray control module 31 is used to control the spray duration and spray flow rate of the nozzles 3. Specifically, the spray control module 31 includes multiple solenoid valves and a controller. The solenoid valves are installed on the spray pipeline, and each solenoid valve corresponds to one nozzle 3. The controller is connected to the multiple solenoid valves and can control the opening and closing of the solenoid valves, as well as the opening degree of the solenoid valves. In this way, the controller can accurately control the spray duration and spray flow rate of the nozzles 3 and output a unified time signal to ensure the synchronization of measurement data. In this embodiment, the controller can be a PLC (Programmable Logic Controller).

[0022] Reference Figure 1 and Figure 2 As shown, the data acquisition module 5 is electrically connected to the weighing device 4 and the spray control module 31. The data acquisition module 5 is used to record the mass change value of the water tank 1, the spraying time of the nozzle, and the spray flow rate parameters in real time. Furthermore, the data acquisition module 5 synchronously records these data using a unified timestamp.

[0023] In the embodiments of this application, reference is made to Figure 2 As shown, the system also includes a temperature and humidity monitoring module 7, which comprises multiple temperature and humidity sensors. These sensors are respectively installed in the spray areas of the multiple nozzles 3 and at the air outlet of the heat exchanger. A data acquisition module 5 is connected to the temperature and humidity monitoring module 7, which can also simultaneously collect temperature and humidity values ​​from the spray areas and the air outlet. The measurement accuracies of the temperature and humidity sensors are ±0.5℃ and ±2%RH, respectively.

[0024] Reference Figure 2 As shown in the embodiment of this application, the system also includes an infrared thermal imager 8, which is disposed on one side of the heat exchanger 9. The infrared thermal imager 8 is used to scan the surface temperature distribution of the heat exchange tubes in the heat exchanger 9.

[0025] Reference Figure 1 and Figure 2As shown, the calculation module 6 is connected to the data acquisition module 5. The calculation module 6 is used to calculate the actual evaporation loss of the spray based on the mass change value, spray time and spray flow parameters collected by the data acquisition module 5 within a unit time, and to obtain the evaporation rate within a unit time.

[0026] In this embodiment of the application, the formula for calculating the evaporation rate is: E=Δm / (Q×t) Where E is the evaporation rate, Δm is the amount of water tank mass reduction during spraying, Q is the spray flow rate parameter, and t is the spraying time.

[0027] Reference Figure 1 , Figure 2 and Figure 3 As shown, during the experiment, the high-pressure pump 2 pumps water from the water tank 1 to the nozzle 3, which sprays the water in a mist and distributes it onto the surface of the heat exchanger. During this process, the weighing device 4 outputs real-time data on the mass change Δm of the water tank 1, and the spray control module 31 provides the spray time t and spray flow rate Q. Next, the data acquisition module 5 adds a unified timestamp to the above parameters and sends them to the calculation module 6. After receiving the synchronized data, the calculation module 6 first filters and smooths the m(t) signal to remove errors caused by mechanical vibration and environmental noise, and then obtains Δm through a differential algorithm. Subsequently, the evaporation rate is automatically calculated according to the formula E=Δm / (Q×t), and a time-series evaporation efficiency curve is generated. Based on this, the system further introduces a temperature and humidity monitoring module 7 and an infrared thermal imager 8 to perform coupled analysis of the ambient temperature, humidity, and cooling surface temperature under different operating conditions, thereby generating a time-series evaporation efficiency curve and a spatial heat distribution map, achieving a comprehensive evaluation of evaporation efficiency. This flowchart highlights the entire information chain of this invention, from initial measurement, data synchronization, calculation analysis to performance evaluation.

[0028] In one embodiment, the system may further include a display module connected to the computing module, and the display module is capable of receiving and displaying evaporation rate and related images, thereby enabling testing personnel to perform visual analysis of the data.

[0029] The following will describe the usage process of the system in the embodiments of this application with reference to example data.

[0030] The detection system in this embodiment is installed on a standardized evaporative cooling experimental platform. The system includes a 10L stainless steel water tank, the bottom of which is mounted on an electronic balance via a fixed bracket. The electronic balance has a weighing accuracy of 0.1g and a sampling cycle of 10s. The water tank outlet is connected to the high-pressure pump inlet, and the high-pressure pump outlet is connected via a spray pipe to a nozzle array positioned above the air inlet of the heat exchanger. The nozzles are tapered atomizing heads, with an atomization angle of 60°–90° for each nozzle to ensure uniform droplet distribution.

[0031] During the integration testing phase, the evaporation efficiency detection system and the high-efficiency enhanced heat exchanger cooler of this invention were arranged in the same duct experimental platform. The main body of the heat exchanger cooler was placed in the middle of the experimental duct, with a spray nozzle array arranged above the air inlet, spraying water mist to cover the air inlet surface of the cooler. Three sets of temperature and humidity sensors were installed at the air outlet of the duct to monitor changes in air parameters in real time; a water tank below the heat exchanger cooler was installed above an electronic balance to detect the consumption of spray water. The system control module and computing module were centrally installed in the control cabinet, communicating with each subsystem via a data bus to achieve synchronous acquisition of the spraying process, weighing data, temperature and humidity information, and infrared images.

[0032] During the experiment, the PLC controller activated the solenoid valve to start the spray, setting the spray flow rate to 7.2 L / min and the spray duration to 10 minutes. The water tank mass started at 8.00 kg and decreased to 6.64 kg after spraying, a decrease of Δm = 1.36 kg. The calculation module automatically read the spray flow rate Q and duration t, and based on the mass balance relationship: E=Δm / (Q×t)=1.36 / (7.2×10)=0.018kg / L The evaporation rate E was found to be 0.018 kg / L. This means that approximately 1.8% of the water in each liter of spray water is actually evaporated, used for heat absorption and energy conversion. This value serves as an evaporation efficiency indicator to evaluate the effectiveness of the spray system.

[0033] Meanwhile, in the experiment, a benchmark test was first conducted under standard environmental conditions (temperature 25℃, relative humidity 50%), recording the evaporation loss and the average temperature drop of the heat exchanger surface after 10 minutes of spraying. Subsequently, the environmental humidity was adjusted to 80%, and the experiment was repeated. The results showed that the evaporation loss Δm decreased to 0.94 kg, and the evaporation rate E decreased to 0.013. The data indicate that increased environmental humidity significantly inhibits evaporation efficiency, and infrared thermal imaging results also show that the temperature drop of the cooler surface decreased by approximately 12%. Comparative analysis can provide quantitative basis for optimizing the operating parameters of high-efficiency heat exchangers (such as spray frequency and wind speed adjustment).

[0034] The evaporation efficiency detection system provided in this application embodiment can realize dynamic quantitative evaluation of the spray cooling process. It has the advantages of high measurement accuracy, good data synchronization and strong scalability. It can be widely used in the performance testing and optimization control of high-efficiency enhanced heat exchange coolers, evaporative condensers and other evaporative cooling equipment.

[0035] Furthermore, the evaporation efficiency monitoring system provided in this application embodiment has at least the following beneficial effects: 1) High-precision real-time measurement By directly measuring mass change using an electronic balance, the indirect errors of the energy balance method are avoided, and the accuracy of evaporation detection can be improved by an order of magnitude.

[0036] 2) Multi-parameter synchronous acquisition A unified timestamp mechanism is adopted to achieve time synchronization of signals such as balance, spray control, and environmental monitoring, effectively eliminating delay errors.

[0037] 3) Multidimensional performance analysis By combining temperature, humidity, and infrared thermal imager data, a spatial correspondence between evaporation efficiency and temperature field distribution can be established, which can intuitively reflect the actual cooling effect of the heat exchange surface.

[0038] 4) Dynamic response assessment By analyzing data from multiple time periods, the dynamic variation characteristics of the evaporation efficiency of the spray system can be obtained, providing a basis for optimizing the operating parameters of the cooler (such as spray cycle, wind speed, and water supply temperature).

[0039] 5) System scalability This application can be modularly expanded according to different cooling equipment or experimental platforms, and is applicable to the performance research of evaporative condensers, wet cooling towers and high heat flux density electronic heat dissipation equipment.

[0040] In summary, this application establishes an evaporation efficiency testing system based on mass balance, enabling quantitative, real-time, and visual evaluation of the spray cooling performance of high-efficiency enhanced heat exchange coolers. This has significant engineering application value and promotional significance.

[0041] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0042] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0043] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler, characterized in that, include: A spray water supply system includes a water tank, a high-pressure pump, a spray pipeline, and multiple nozzles. The input end of the high-pressure pump is connected to the water tank, and the output end of the high-pressure pump is connected to the spray pipeline. The multiple nozzles are arranged on the spray pipeline. A weighing device is installed below the water tank, and the weighing device is used to periodically measure the change in the mass of water stored in the water tank; A spray control module is connected to multiple nozzles, and the spray control module is used to control the spray duration and spray flow rate of the nozzles; A data acquisition module is connected to the weighing device and the spray control module. The data acquisition module is used to record the mass change value of the water tank, the spraying time of the nozzle, and the spray flow rate parameters in real time. The calculation module is connected to the data module. The calculation module is used to calculate the actual evaporation loss of the spray based on the mass change value per unit time, the spray time and the spray flow rate parameters, and to obtain the evaporation rate per unit time.

2. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that: The formula for calculating the evaporation rate is: E=Δm / (Q×t) Where E is the evaporation rate, Δm is the amount of water tank mass reduction during spraying, Q is the spray flow rate parameter, and t is the spraying time.

3. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that, The system also includes: The temperature and humidity monitoring module includes multiple temperature and humidity sensors, which are respectively installed in the spray area of ​​multiple nozzles and the air outlet of the heat exchanger. The data acquisition module is connected to the temperature and humidity monitoring module, and the data acquisition module is also used to acquire the temperature and humidity values ​​of the spray area and the air outlet.

4. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that: The weighing device includes an electronic balance, and the sampling period of the electronic balance is 10s.

5. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that: The spray control module includes multiple solenoid valves and a controller. The solenoid valves are installed on the spray pipeline and correspond one-to-one with the nozzles. The controller is connected to the multiple solenoid valves and is used to control the opening and closing of the solenoid valves.

6. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that: The atomization angle of the nozzle is greater than or equal to 60° and less than or equal to 90°.

7. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that, The system also includes: An infrared thermal imager is installed on one side of the heat exchanger, and the infrared thermal imager is used to scan the surface temperature distribution of the heat exchange tubes in the heat exchanger.

8. The system for detecting the evaporation efficiency of a high-efficiency enhanced heat exchanger cooler according to claim 1, characterized in that, The system also includes: A display module is connected to the calculation module. The display module is used to receive the evaporation rate and display it.

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