Performance testing device for spraying type air cooler

Abstract

The utility model provides a spraying type air cooler performance testing device, which is provided with an air cooling system, a testing medium heating circulation system, a spraying system and a data acquisition system, and detection elements are arranged at key positions of the systems, so that accurate measurement of multiple parameters in the operation process of a spraying type air cooler is realized. The air cooling system can monitor the temperature, the pressure difference, the humidity and the wind speed of the air inlet and outlet end of the air cooler in real time, the test medium heating circulation system can accurately obtain the temperature, the flow and the pressure of a test medium at the inlet and outlet of the air cooler, the spraying system can detect the temperature and the pressure of spraying water, and the data are all transmitted to the data acquisition system. Key performance parameters of the spray type air cooler in actual operation can be comprehensively and accurately obtained according to parameters of the data acquisition system, and test data are uploaded to a computer for heat transfer calculation, so that heat transfer performance test and flow resistance performance test of the spray type air cooler under different use conditions in actual application are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spray type air cooler performance test technical field especially is related to a spray type air cooler performance test device. BACKGROUND

[0002] Air cooler is a kind of wall heat exchanger, and hot medium is cooled or condensed in the process of flowing in heat exchange pipe, and air is heated when flowing through heat exchange pipe outside and absorbs the heat of hot medium in pipe, and finally is discharged into atmosphere. According to the cooling mode outside pipe, air cooler is mainly divided into dry type air cooler, wet type air cooler, dry-wet combined air cooler. Among them, wet type air cooler is mainly divided into two types: humidification type and spray type, and spray type air cooler has humidification and evaporation air cooling simultaneously, and the heat transfer coefficient outside pipe is 3-5 times of ordinary dry type air cooler.

[0003] At present, commonly used air cooler performance test device is only suitable for testing conventional dry type air cooler, for example, patent publication number CN212808132U, a kind of heat exchange performance detection device for air cooler and publication number CN106769159A, a kind of air cooler performance detection system. At present, there is no device that can test the actual heat transfer performance of spray type air cooler in production application, and the heat transfer effect of this type of product cannot be quantitatively evaluated, which hinders the speed of research and development, innovation, test demonstration, technological innovation and energy efficiency upgrading of spray type air cooler. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of spray type air cooler performance test device, to solve the problem that there is no system that can test the heat transfer performance of spray type air cooler at present, which affects the research and development of spray type air cooler.

[0005] The utility model provides a kind of spray type air cooler performance test device, including air cooler to be measured, air cooling system, test medium heating circulation system, spray system and data acquisition system;The air cooling system includes the detection element for detecting the air temperature, pressure difference, humidity and wind speed of air inlet end and air outlet end of air cooler to be measured respectively;The test medium heating circulation system includes storage tank for storing test medium, the storage tank is communicated with the medium inlet and medium outlet of air cooler to be measured by circulation pipeline, and detection element for detecting liquid temperature and pressure is arranged on circulation pipeline at medium inlet end and medium outlet end of air cooler to be measured;The spray system includes spray assembly for spraying spray water to air cooler to be measured, detection element for detecting spray water temperature and pressure is arranged on water delivery pipe of spray assembly, and the detection element in air cooling system, test medium heating circulation system and spray system is signal connected with data acquisition system.

[0006] Further, the detection element of the air cooling system comprises a first temperature sensor, a first differential pressure gauge arranged at the air inlet, a second temperature sensor, a second differential pressure gauge and an air speed measuring instrument arranged at the air outlet, and a plurality of air humidity sensors arranged at intervals along the air flow direction.

[0007] Further, a plurality of liquid temperature sensors are arranged at intervals inside the storage tank, and a liquid supplementing pipe and a liquid discharging pipe are arranged at the upper and lower ends of the side of the storage tank, respectively.

[0008] Further, a heating stirrer is arranged inside the storage tank.

[0009] Further, a liquid feeding pump is arranged on the circulating pipeline, and liquid flow adjusting valves, liquid temperature sensors and pressure transmitters are arranged on the circulating pipeline at both sides of the air cooler to be tested.

[0010] Further, the medium inlet and the medium outlet of the air cooler to be tested are connected with the circulating pipeline through first and second adapters, and the first and second adapters are pipe fittings with flanges arranged at both ends.

[0011] Further, the spraying system comprises a water tank and a spraying pipeline, the spraying pipeline is arranged directly above the air cooler to be tested, the spraying nozzles on the spraying pipeline are directed to the surface of the heat exchange pipes of the air cooler to be tested, the water tank is connected with the spraying pipeline through a water feeding pipe, and a circulating water pump, a third flow adjusting valve, a third pressure transmitter and a first temperature transmitter are arranged on the water feeding pipe.

[0012] Further, the spraying system further comprises a water collector arranged below the air cooler to be tested, the water collector is connected with the water tank through a water return pipe, and a second temperature transmitter is arranged on the water return pipe.

[0013] Further, a self-cooling assembly is arranged at one side of the water tank and connected with the water tank, for adjusting the temperature of the spraying water to a preset range.

[0014] Further, the test medium circulating in the test medium heating and circulating system is water, ethylene glycol or oil.

[0015] The beneficial effects of the technical scheme are: the test system is provided with an air cooling system, a test medium heating circulation system, a spraying system and a data acquisition system, and detection elements are installed at key positions of the systems, so that the accurate measurement of multiple parameters in the operation process of the spraying air cooler is realized. The air cooling system can monitor the temperature, pressure difference, humidity and wind speed of the air inlet and outlet of the air cooler in real time, the test medium heating circulation system can accurately obtain the temperature, flow and pressure of the test medium at the inlet and outlet of the air cooler, and the spraying system can detect the temperature and pressure of the spraying water. These data are transmitted to the data acquisition system, and the key performance parameters of the spraying air cooler in the actual operation can be comprehensively and accurately obtained according to the parameters of the data acquisition system, so that the quantitative evaluation of the heat transfer performance of the spraying air cooler is realized, and the development process of the spraying air cooler in research and development innovation, test demonstration, technical innovation and energy efficiency upgrading is promoted. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical schemes in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The overall structure of the present application is shown in the figure.

[0018] The drawings are explained as follows: 1 is a spraying air cooler to be tested, 2 is a first differential pressure meter, 3 is a first temperature sensor, 4 is an air humidity sensor, 5 is a second differential pressure meter, 6 is a wind speed measuring instrument, 7 is a second temperature sensor, 8 is a storage tank, 9 is a circulating pipeline, 10 is a liquid infusion pump, 11 is a first liquid flow regulating valve, 12 is a first pressure transmitter, 13 is a first liquid temperature sensor, 14 is a second liquid flow regulating valve, 15 is a second liquid temperature sensor, 16 is a second pressure transmitter, 17 is a third liquid temperature sensor, 18 is a liquid supplementing pipe, 19 is a liquid discharging pipe, 20 is a heating stirrer, 21 is a first adapter, 22 is a second adapter, 23 is a spraying pipeline, 24 is a spraying regulating valve group, 25 is a spraying nozzle, 26 is a water tank, 27 is a water conveying pipe, 28 is a circulating water pump, 29 is a third flow regulating valve, 30 is a third pressure transmitter, 31 is a first temperature transmitter, 32 is a water collector, 33 is a backwater pipe, 34 is a second temperature transmitter, and 35 is a self-cooling assembly. DETAILED DESCRIPTION

[0019] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] In the description of the present utility model, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientations or positional relationships shown based on the drawings, and are merely for the convenience of describing the present utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model.

[0021] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0022] Embodiment 1

[0023] As Figure 1 shown, the present utility model provides a kind of spray type air cooler performance testing device, including to be measured spray air cooler 1, air cooling system, test medium heating circulation system, spraying system and data acquisition system;Detection element in air cooling system, test medium heating circulation system and spraying system is connected with data acquisition system signal, and data acquisition system real-time acquisition air side, medium side and the parameter of spraying side, and the heat transfer coefficient of to be measured spray air cooler 1 is calculated by computer.

[0024] The air cooling system comprises detection elements for detecting air temperature, pressure difference, humidity and air speed at the air inlet end and the air outlet end of the to-be-tested spray air cooler 1 respectively; the detection elements comprise a first temperature sensor 3, a first pressure difference meter 2 arranged at the air inlet, a second temperature sensor 7, a second pressure difference meter 5 and an air speed measuring instrument 6 arranged at the air outlet, and a plurality of air humidity sensors 4 arranged at intervals along the air flow direction.

[0025] The test medium heating circulation system comprises a storage tank 8 for storing test medium, which is used for storing cooling liquid meeting the required liquid inlet temperature of different models of air coolers and collecting the cooling liquid after circulation. The storage tank 8 is in communication with the medium inlet and the medium outlet of the to-be-tested spray air cooler 1 through a circulation pipeline 9. The medium inlet and the medium outlet of the to-be-tested spray air cooler 1 are connected with the circulation pipeline 9 through a first adapter 21 and a second adapter 22 respectively. The first adapter 21 and the second adapter 22 are stainless steel pipes with flanges at both ends, which can realize quick installation and batch performance testing of air coolers of different specifications and models. A plurality of third liquid temperature sensors 17 are arranged at intervals in the storage tank 8 to measure the liquid temperature in different areas of the storage tank 8. A liquid supplementing pipe 18 and a liquid discharging pipe 19 are arranged at the upper end and the lower end of the side of the storage tank 8 respectively. A heating stirrer 20 is installed in the storage tank 8 to heat and stir the cooling liquid in the storage tank 8 to ensure uniform temperature of the cooling liquid. A liquid conveying pump 10 is installed on the circulation pipeline 9. The liquid conveying pump 10 drives the liquid to flow in the circulation pipeline 9. After the liquid enters the to-be-tested spray air cooler 1, it exchanges heat with the air flow in the air cooling system. Therefore, the temperature of the liquid flowing out of the to-be-tested spray air cooler 1 decreases, and the temperature of the air flow flowing through the to-be-tested spray air cooler 1 increases. Liquid flow regulating valves, liquid temperature sensors and pressure transmitters are arranged on the circulation pipeline 9 on both sides of the to-be-tested spray air cooler 1. In order to distinguish them, the liquid inlet of the to-be-tested spray air cooler 1 is named as a first liquid flow regulating valve 11, a first liquid temperature sensor 13 and a first pressure transmitter 12, and the liquid outlet of the to-be-tested spray air cooler 1 is named as a second liquid flow regulating valve 14, a second liquid temperature sensor 15 and a second pressure transmitter 16.

[0026] The test medium circulating in the test medium heating circulation system is water, ethylene glycol or oil and other actual working condition media.

[0027] The spray system comprises a spray assembly for spraying the spray water to the spray air cooler 1 to be tested, the water supply pipe 27 of the spray assembly is provided with a detection element for detecting the temperature and pressure of the spray water, the spray assembly comprises a water tank 26, a spray pipeline 23 and a water collector 32, the water tank 26 is connected with a water supplement pipeline, the water supplement pipeline is connected with a water source, the water tank 26 is communicated with the spray pipeline 23 through the water supply pipe 27, and the spray pipeline 23 is arranged directly above the spray air cooler 1 to be tested. The spray nozzle 25 on the spray pipeline 23 is directed to the surface of the heat exchange pipe of the spray air cooler 1 to be tested, and a continuous and uniform water film is formed outside the pipe, and the water drops on each layer of pipe in turn until falling into the water collector 32. The water supply pipe 27 is provided with a circulating water pump 28, a third flow regulating valve 29, a third pressure transmitter 30 and a first temperature transmitter 31. The water collector 32 is arranged below the spray air cooler 1 to be tested, and the water collector 32 is connected with the water tank 26 through a backwater pipe 33. The backwater pipe 33 is provided with a second temperature transmitter 34.

[0028] A self-cooling assembly 35 is arranged on one side of the water tank 26 and communicated with the water tank 26, so that the temperature of the spray water can be adjusted to a preset range.

[0029] The storage tank in the test medium heating circulation system, the water tank in the spray system and the spray pipeline are all made of S304 stainless steel, so that the test requirements of different media can be met.

[0030] The use method of the performance testing device is as follows: during the test, the test medium heating circulation system is started first, the test medium is selected and added into the storage tank 8, the test medium is heated to a specified test temperature by using the heating stirrer 20 and the third liquid temperature sensor 17, the delivery pump 10 is started, the test medium enters the heat exchange pipe through the circulating pipeline 9, and the tube side of the spray air cooler 1 to be tested is filled.

[0031] After the tube side is filled, the spray system is started, the circulating water pump 28 pumps water, the water is adjusted in flow through the third flow regulating valve 29, and then is supplied to the spray pipeline 23 at the top through the third pressure transmitter 30 and the first temperature transmitter 31. The spray flow and spray pressure are adjusted through the spray regulating valve group 24, and the water is distributed to the spray nozzle 25 and then sprayed onto the spray air cooler 1 to be tested. The water film completes heat exchange with the surface of the heat exchange pipe of the spray air cooler 1 to be tested on one hand, and evaporates and takes away a large amount of heat under the action of air on the other hand, so that the heat transfer performance test of the spray air cooler can be carried out, and the spray water and the evaporated water vapor are condensed and then returned to the water tank 26 through the water collector 32.

[0032] Finally, the air cooling system is started, the fan / fan of the spray air cooler 1 to be tested is used, air is sucked from below the air cooler, and the air flows from bottom to top through the spray air cooler 1 to be tested, and forms a counterflow with the spray water.

[0033] After the working condition is stable, data acquisition is performed:

[0034] The temperature difference of the liquid medium after flowing through the to-be-tested spray air cooler 1 is tested through the first liquid temperature sensor 13 and the second liquid temperature sensor 16. The pressure difference of the liquid before and after flowing through the to-be-tested spray air cooler 1 is obtained through the first pressure transmitter 12 and the second pressure transmitter 16, so as to obtain the flow resistance performance of the to-be-tested spray air cooler 1. The fluid medium side heat load and the heat transfer coefficient of the to-be-tested spray air cooler 1 are calculated according to the flow difference of the liquid before and after flowing through the to-be-tested spray air cooler 1 through the first liquid flow regulating valve 11 and the second liquid flow regulating valve 14, and according to the collected temperature, pressure drop and flow data.

[0035] The air temperature difference before and after the air flow flowing through the to-be-tested spray air cooler 1 is obtained through the first temperature sensor 3 and the second temperature sensor 7, the air humidity at different positions of the to-be-tested spray air cooler 1 is obtained through the plurality of air humidity sensors 4, the pressure drop of the air flow at the inlet is obtained through the first pressure difference meter 2 and the second pressure difference meter 5, and then the air side flow resistance performance is obtained, and the flow rate of the air outlet is obtained through the air speed measuring instrument 6. The heat load and the heat transfer coefficient of the air side are obtained according to the collected air side temperature, humidity, pressure drop and flow rate data.

[0036] The total heat transfer coefficient of the to-be-tested spray air cooler 1 is calculated through the calculated fluid medium side heat load, air side heat load and air speed, and the heat transfer performance test experiment is completed.

[0037] In the embodiment, the calculation methods of the air side heat load, the fluid medium side heat load and the heat transfer coefficient of the to-be-tested spray air cooler 1 are disclosed in GB / T 27698.1-2023 “Performance test methods for heat exchangers and heat transfer elements Part 1: General requirements” and GB / T 27698.2-2023 “Performance test methods for heat exchangers and heat transfer elements Part 2: Heat exchangers”, which belong to the prior art, and thus the calculation principles are not described in detail.

[0038] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A performance testing device for a spray type air cooler, characterized by, The air cooling system comprises detection elements for detecting air temperature, pressure difference, humidity and air speed at the air inlet end and air outlet end of the air cooler respectively. The test medium heating circulation system comprises a storage tank for storing test medium, which is in communication with the medium inlet and medium outlet of the air cooler through a circulation pipeline, and detection elements for detecting liquid temperature and pressure are arranged on the circulation pipeline at the medium inlet end and medium outlet end of the air cooler respectively.

2. The spray type air cooler performance testing device according to claim 1, wherein The detection elements of the air cooling system comprise a first temperature sensor, a first pressure difference meter arranged at the air inlet, a second temperature sensor, a second pressure difference meter and an air speed measuring instrument arranged at the air outlet, and a plurality of air humidity sensors arranged at intervals along the air flow direction.

3. The spray-type air cooler performance test device according to claim 1, wherein A plurality of liquid temperature sensors are arranged at intervals inside the storage tank, and a liquid supplementing pipe and a liquid discharging pipe are arranged at the upper and lower ends of the side of the storage tank respectively.

4. The spray-type air cooler performance testing device according to claim 1, wherein A heating stirrer is installed inside the storage tank.

5. The spray-type air cooler performance test device according to claim 1, wherein A liquid delivery pump is installed on the circulation pipeline, and a liquid flow regulating valve, a liquid temperature sensor and a pressure transmitter are arranged on the circulation pipeline at both sides of the air cooler.

6. The spray-type air cooler performance testing device according to claim 1, wherein The medium inlet and medium outlet of the air cooler are connected to the circulation pipeline through a first adapter and a second adapter respectively, and the first adapter and the second adapter are both pipe fittings with flanges at both ends.

7. The spray-type air cooler performance testing device according to claim 1, wherein The spraying system comprises a water tank and a spraying pipeline, the spraying pipeline is erected above the air cooler, the spraying nozzles on the spraying pipeline are directed towards the surface of the heat exchange pipes of the air cooler, the water tank is in communication with the spraying pipeline through a water delivery pipe, and a circulating water pump, a third flow regulating valve, a third pressure transmitter and a first temperature transmitter are installed on the water delivery pipe.

8. The spray-type air cooler performance testing device according to claim 7, wherein The spraying system further comprises a water collector, which is arranged below the air cooler, and the water collector is connected to the water tank through a backwater pipe, and a second temperature transmitter is arranged on the backwater pipe.

9. The spray-type air cooler performance testing device according to claim 7, wherein A self-cooling assembly is arranged on one side of the water tank in communication therewith, for adjusting the temperature of the spraying water to a preset range.

10. The spray-type air cooler performance testing device according to claim 1, wherein The test medium circulating in the test medium heating circulation system is water, ethylene glycol or oil.

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