Radiation refrigeration material multi-factor coupling aging test device and method

Abstract

The invention discloses a radiation refrigeration material multi-factor coupling aging test device and method, and the device comprises an aging treatment device which comprises a rotatable platform, an environment simulation cabin, a temperature control wind system, a UV irradiation system, a multi-mode raining system, an automatic condensation system, and a central control unit. The rotatable platform is used for placing a radiation refrigeration material and realizing three-dimensional rotation; the temperature control wind system comprises a temperature adjusting unit and a wind speed adjustable fan which are arranged on the environment simulation cabin; the UV irradiation system comprises an ultraviolet light source array arranged at the top of the environment simulation cabin, and a light intensity controller and a radiation intensity probe which are arranged in the environment simulation cabin; the multi-mode raining system is used for simulating a humid environment and raindrop impact; the automatic condensation system is used for simulating a condensation phenomenon in a high-humidity environment; the central control unit is used for setting and regulating operation parameters of the whole testing device. The device simulates the influence of various factors on the performance of the radiation refrigeration material in a real natural environment, and has high universality and flexibility.

Description

Technical Field

[0001] This invention belongs to the field of radiation cooling material testing, specifically relating to a multi-factor coupled aging test device and method for radiation cooling materials. Background Technology

[0002] With the intensification of global climate change and the increasing frequency of extreme weather events, greenhouse gas emissions are exacerbating the damage to the ecological environment. The high energy consumption of traditional refrigeration technologies is becoming increasingly prominent. Therefore, developing new refrigeration technologies to reduce energy consumption in refrigeration and achieve efficient refrigeration has become an urgent problem to be solved.

[0003] Passive radiative cooling technology, as a novel low-energy cooling method, achieves cooling by reflecting sunlight and utilizing high emissivity in the "atmospheric window" (8-13μm) wavelength band, and has broad application prospects. However, in practical applications, radiative cooling materials are affected by various environmental factors, such as ultraviolet radiation, raindrops, and temperature and humidity changes. These factors can accelerate the aging of materials and affect their cooling performance.

[0004] Therefore, developing an aging test device and method that can simulate the coupling of multiple natural environmental factors is of great significance for evaluating the durability and performance stability of radiation cooling materials. Summary of the Invention

[0005] Based on the problems existing in the prior art, this invention proposes a multi-factor coupled aging test device and method for radiative cooling materials. This device can simulate the coupling of various natural environmental factors to conduct comprehensive aging tests on radiative cooling materials in order to evaluate their performance changes under complex environments.

[0006] The present invention adopts the following technical solution:

[0007] A multi-factor coupled aging test device for radiation cooling materials includes an aging treatment device for performing multi-factor coupled aging treatment on radiation cooling materials and a performance test device for performing performance testing on radiation cooling materials after aging treatment. The aging treatment device includes a rotatable platform, an environmental simulation chamber, a temperature control air system, a UV irradiation system, a multi-mode rain system, an automatic condensation system, and a central control unit.

[0008] The rotatable platform is located inside the environmental simulation chamber and is used to place the radiation cooling material and achieve three-dimensional rotation.

[0009] The temperature control system includes a temperature regulation unit and an adjustable fan installed on the environmental simulation chamber;

[0010] The UV irradiation system includes an ultraviolet light source array located on the top of the environmental simulation chamber, and a light intensity controller and a radiation intensity probe located inside the environmental simulation chamber.

[0011] The multi-mode rain system is used to simulate humid environments and raindrop impact;

[0012] The automatic condensation system is used to simulate condensation phenomena in high humidity environments;

[0013] The central control unit is used to set and regulate the operating parameters of the entire testing device.

[0014] Furthermore, the rotatable platform includes: a telescopic rod, a pressure nut, a tray, a rotating motor, and a three-jaw mechanism;

[0015] The bottom end of the telescopic rod is fixed to the center position of the bottom of the environmental simulation chamber;

[0016] The pressure nut is used to fix the telescopic rod after it has been adjusted to the set height.

[0017] The bottom of the tray is equipped with a support column, the bottom of which engages with a rotating motor. The test sample is fixed to the surface of the tray with tape to prevent it from being thrown out during rotation.

[0018] The rotating motor is used to drive the tray to rotate, ensuring that the test materials placed on the tray are affected equally in all directions within the horizontal plane.

[0019] The three-claw mechanism includes three identical rods, one end of each rod is hinged to a telescopic rod, and the other end is connected to the bottom of the tray. Each rod has a hinge in the middle section. The tray can be tilted by manually adjusting the bending angle of each rod and adjusting the tightness of the hinge.

[0020] Furthermore, the multi-mode rain system includes: an atomizing nozzle assembly, a drip pipe, a water tank, a water pump, and a drain outlet;

[0021] The atomizing nozzle assembly and drip pipe are fixed to the top of the environmental simulation chamber, located above the rotatable platform;

[0022] The water tank is connected to the atomizing nozzle assembly and the drip pipe via a water pipe;

[0023] The water pump is used to transport water from the water tank to the water pipe;

[0024] The drain outlet is located at the bottom of the environmental simulation chamber and is connected to the water tank;

[0025] The atomizing nozzle assembly generates water mist with a particle size of <100μm, and the humidity control range is 20%-100%RH; the raindrop simulation frequency of the drip tube array is 5-60 drops / min, and the drop height is changed by adjusting the length of the telescopic rod.

[0026] Furthermore, the automatic condensation system includes: a condensation plate fixed on the tray and a temperature and humidity sensor; the temperature and humidity sensor is used to collect temperature and humidity data, which is processed by the central control unit to control the temperature of the condensation plate, with a temperature difference control accuracy of ±0.5℃, so as to realize condensation on the surface of the sample being tested.

[0027] Furthermore, the central control unit includes: a multi-factor coupling program module for setting any combination and duration of wind, sun exposure, rain, and condensation; and a long-cycle cyclic control module that supports continuous testing for ≥30 days and can simulate day-night alternation environments.

[0028] Furthermore, the long-cycle cyclic control module can be programmed with periodic changes, including: UV light intensity changing according to the solar diurnal cycle curve; and wind and rain parameters simulating sudden changes in weather conditions based on meteorological data.

[0029] Furthermore, the environmental simulation chamber has a sample entry / exit door and a ventilation opening on its side.

[0030] Furthermore, the temperature control air system is located on the four side walls of the environmental simulation chamber, with the air outlets facing the rotatable platform. The temperature adjustment range of the temperature control air system is 25°C to 80°C, and the wind speed is continuously adjustable in the range of 0.5-15m / s.

[0031] Furthermore, the spectral range of the ultraviolet light source array is 280-400 nm, and the irradiance is 0.1-1.5 W / m². 2 Adjustable within the range, including independent control modules for UVA / UVB bands.

[0032] A method for testing the multi-factor coupled aging of any of the aforementioned radiation-cooled materials includes the following steps:

[0033] First, the sample of the radiation-cooling material to be tested is fixed on the tray of the rotatable platform. The environmental parameters are determined according to the testing requirements, including temperature, wind speed, ultraviolet intensity, humidity, raindrop frequency, tray rotation speed, and tray angle, as detailed below:

[0034] The tray speed and tray angle can be adjusted by starting the rotating motor of the rotatable platform and adjusting the angle of the three-jaw mechanism;

[0035] Start the temperature control unit, set the heating temperature to heat the air, and turn on the adjustable fan to blow air onto the tray from four directions at a fixed speed.

[0036] The ultraviolet light source array is turned on, and ultraviolet radiation is carried out at a constant light intensity through the light intensity controller. The radiation intensity information is collected through the radiation intensity probe and transmitted to the central control unit. The intensity of the ultraviolet light source array is adjusted according to the feedback of the radiation intensity information.

[0037] Turn on the water pump to start water circulation. Water forms water mist through the atomizing nozzle group. Adjust the humidity of the device. Some water drips directly onto the sample being tested through the drip pipe to simulate rain. By adjusting the power of the water pump 104, the frequency of water droplets falling at different frequencies can be controlled.

[0038] Temperature and humidity data collected by temperature and humidity sensors are transmitted to the central control unit for feedback adjustment, thereby stabilizing the temperature and humidity within the required range. Based on the multi-factor coupling program module and long-cycle loop control module, the required test temperature, wind speed, ultraviolet intensity, humidity, raindrop frequency, tray rotation speed and tray angle are set, and the duration and cycle of each environmental parameter are set. After the test is completed, the test sample is taken out, and the performance of the radiative cooling material after the aging treatment device is tested through the performance testing device.

[0039] The beneficial effects of this invention are as follows:

[0040] 1. It can simulate the coupling of various natural environmental factors, including ultraviolet radiation, raindrops, and temperature and humidity changes, to comprehensively evaluate the aging performance of radiation cooling materials.

[0041] 2. The rotatable platform can achieve three-dimensional rotation and height adjustment, ensuring that the sample is subjected to uniform force at different angles and positions, thereby improving the accuracy of test results.

[0042] 3. The temperature control system, UV irradiation system, multi-mode rain system, and automatic condensation system work together to accurately simulate various complex natural environmental conditions.

[0043] 4. The central control unit supports long-cycle cyclic testing and programs for periodic changes in various environmental parameters, and can simulate natural environmental changes such as day-night cycles, exhibiting high flexibility and versatility.

[0044] 5. By comparing the effects of cyclical aging of different types on the radiative cooling material under coupled test factors, and subsequently measuring the cooling performance of the radiative cooling material, the advantages and disadvantages of this type of radiative cooling material can be explained. Attached Figure Description

[0045] Figure 1 This is a structural diagram of a multi-factor coupled aging test device for radiation cooling materials according to an embodiment of the present invention;

[0046] Figure 2 This is a structural diagram of a rotatable platform according to an embodiment of the present invention;

[0047] In the diagram: 1. Base; 2. Rotatable platform; 3. Rotating motor; 4. Three-jaw mechanism; 5. Environmental simulation chamber; 51. Sample entry / exit door; 6. Telescopic rod; 7. Pressure nut; 8. Temperature control system; 81. Temperature adjustment unit; 82. Adjustable fan; 9. UV irradiation system; 91. Ultraviolet light source array; 92. Light intensity controller; 93. Radiation intensity probe; 10. Multi-mode rain system; 101. Atomizing nozzle assembly; 102. Drip pipe; 103. Water tank; 104. Water pump; 11. Automatic condensation system; 111. Condensation plate; 112. Temperature and humidity sensor; 12. Central control unit; 13. Ventilation outlet; 14. Drain outlet. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application.

[0049] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0050] Example 1:

[0051] like Figure 1 and 2 As shown, a multi-factor coupled aging performance testing device for radiation cooling materials is disclosed. The aging treatment device is used to perform multi-factor coupled aging treatment on radiation cooling materials, and the performance testing device is used to test the performance of radiation cooling materials after aging treatment. The aging treatment device includes: a base 1;

[0052] The rotatable platform 2, located at the center of the environmental simulation chamber 5, includes: a tray, a rotating motor 3, a three-jaw mechanism 4, a telescopic rod 6, and a pressure nut 7;

[0053] The environmental simulation chamber 5, located on the base 1, includes: a sample entry and exit door 51 and a ventilation opening 13;

[0054] The temperature control air system 8 includes: a temperature adjustment unit 81 that specifically uses resistance wire heating to achieve temperature adjustment, and a fan 82 with adjustable wind speed;

[0055] The UV irradiation system 9 includes: an ultraviolet light source array 91, a light intensity controller 92, and a radiation intensity probe 93;

[0056] The multi-mode rain system 10 includes: atomizing nozzle assembly 101, drip pipe 102, water tank 103, water pump 104, and drain outlet 14;

[0057] Automatic condensation system 11 includes: condenser plate 111 and temperature and humidity sensor 112;

[0058] Central control unit 12.

[0059] All of the above-mentioned structures are waterproof.

[0060] The environmental simulation chamber 5 is equipped with a drain outlet 14 at the bottom, which facilitates the discharge of water generated during the test into the water tank 103 of the multi-mode rain system 10, forming a circulation loop with the multi-mode rain system 10.

[0061] The telescopic rod 6 is fixed at its bottom to the center of the environmental simulation chamber 5. The pressure nut 7 is used to fix the telescopic rod 6 after it has been adjusted to a set height. The bottom of the tray is provided with a support column, the bottom of which engages with the rotating motor 3. The test sample is fixed to the surface of the tray with tape to prevent it from being thrown out during rotation. The rotating motor 3 is used to drive the tray to rotate, ensuring that the test material placed on the tray is affected equally by all directions in the horizontal plane. The three-claw mechanism 4 includes three identical rods, one end of which is hinged to the telescopic rod 6 and the other end is connected to the bottom of the tray. Each rod has a hinge in the middle section.

[0062] The tilt angle of the rotatable platform 2 can be adjusted by the three-jaw mechanism 4. Specifically, the adjustment method is to manually adjust the tension of the three rods of the three-jaw mechanism 4, that is, the middle hinge of the three mechanical connection parts, so that the hinge of each part is at a different angle, thereby achieving different platform heights in three directions and realizing a small range of tilt adjustment from 0° to 30°.

[0063] The adjustable fan 82 of the temperature control system 8 is fixed to the four walls of the environmental simulation chamber 5, with the air outlet facing the tray. The resistance wire is installed on the adjustable fan 82 to adjust the temperature and wind speed inside the environmental simulation chamber 5.

[0064] The UV irradiation system 9 has an ultraviolet light source array 91 installed on the top of the environmental simulation chamber 5 to simulate ultraviolet irradiation; a radiation intensity probe 93 is installed on the side of the environmental simulation chamber 5 to measure the radiation intensity and transmit it to the central controller 12.

[0065] The drip pipe 102 is installed on the top of the environmental simulation chamber 5 and can release raindrops at a set frequency and intensity. The height of the droplet can be adjusted by adjusting the height of the telescopic rod 6 to meet the test requirements and simulate rainfall conditions of different intensities.

[0066] The automatic condensation system 11 is installed on the upper surface of the rotatable platform 2 to simulate condensation phenomena in a high humidity environment. The system includes a condenser plate 111 and a temperature and humidity sensor 112. The condenser plate 111 achieves dew point regulation through temperature difference control, while the temperature and humidity sensor 112 is used to precisely control the temperature of the condenser plate, thereby simulating the condensation process. The temperature difference control accuracy can reach ±0.5℃.

[0067] The central control unit 12 is the core control component of this device, used to set and regulate the operating parameters of the entire testing device. The central control unit 12 includes a multi-factor coupling program module and a long-cycle loop control module, which can achieve coordinated control of multiple environmental factors such as the temperature control system 8, the UV irradiation system 9, the multi-mode rain system 10, and the automatic condensation system 11. It can also simulate long-term environmental changes such as day-night alternation and seasonal changes according to preset programs, supporting continuous testing for ≥30 days.

[0068] The ventilation opening 13 is installed above the side wall of the environmental simulation chamber 5 to maintain ventilation inside the chamber. The exhaust fan of the ventilation opening 13 can promptly remove excess exhaust gas and heat from the chamber, maintaining a stable environment inside the chamber; the drain outlet 14 is used to drain water generated during the test, ensuring the normal operation of the device and the accuracy of the test results.

[0069] The tested radiation-cooling material sample refers to a material with radiation-cooling capability, which can be either a radiation-cooling coating or a radiation-cooling film.

[0070] The quality of a radiation cooling material is evaluated by comparing its cooling performance after being treated under specified time, environmental conditions, and cyclical conditions.

[0071] Example 2:

[0072] Based on the testing device described in Example 1, its working method is as follows:

[0073] First, the sample of the radiation-cooling material to be tested is fixed on the rotatable platform 2. Then, environmental parameters are set according to the testing requirements, including temperature, wind speed, ultraviolet intensity, humidity, and raindrop frequency. The temperature regulation unit 81 of the temperature-controlled air system 8 is activated, specifically by energizing the heating resistance wire. The air inside the temperature-controlled air system 8 is preheated by setting the heating temperature. After the air temperature inside the temperature-controlled air system 8 stabilizes, the adjustable fan 82 is turned on to blow air from four directions towards the center at a fixed speed. Next, the irradiation system 9 is activated, and the ultraviolet light source array 91 is turned on. Ultraviolet irradiation is carried out at a constant light intensity through the light intensity controller 92. The radiation intensity information is collected by the radiation intensity probe 93 and transmitted to the central control unit 12. The intensity of the UVA / UVB band ultraviolet lamps is adjusted based on the feedback of the irradiation intensity information. The multi-mode rain system 10 is further activated by turning on the water pump 104 to start water circulation. Water is atomized into mist through the atomizing nozzle group 101 to regulate the humidity of the device. Some water is dripped directly onto the test material through the drip pipe 102 to simulate rain. The frequency of water droplets is controlled by adjusting the power of the water pump 104. Data from the temperature and humidity sensors collected by the central control unit 12 is used for feedback adjustment to stabilize the humidity within the required range. Furthermore, a periodic control program is set in the central control unit to set the required test temperature, wind speed, ultraviolet intensity, humidity, raindrop frequency, platform speed, etc., and to set the duration and cycle of each aging simulation test (e.g., 1 hour of irradiation – 1 hour of water droplet dripping – 1 hour of constant temperature wind blowing, cycling in sequence). After the test is completed, the test sample is removed.

[0074] This testing device can achieve coupled simulation of various natural environmental factors, and can precisely control various environmental parameters and achieve periodic simulation through the central control unit 12. By adjusting the angle and position of the rotatable platform 2, it can achieve multi-angle and all-round environmental exposure, simulate the influence of various factors on the performance of radiation cooling materials under real natural environment, and has strong universality and flexibility.

Claims

1. A multi-factor coupled aging test device for radiation cooling materials, characterized in that, It includes an aging treatment device for performing multi-factor coupled aging treatment on radiative cooling materials and a performance testing device for performing performance testing on radiative cooling materials after aging treatment; the aging treatment device includes a rotatable platform, an environmental simulation chamber, a temperature control air system, a UV irradiation system, a multi-mode rain system, an automatic condensation system, and a central control unit. The rotatable platform is located inside the environmental simulation chamber and is used to place the radiation cooling material and achieve three-dimensional rotation. The temperature control system includes a temperature regulation unit and an adjustable fan installed on the environmental simulation chamber; The UV irradiation system includes an ultraviolet light source array located on the top of the environmental simulation chamber, and a light intensity controller and a radiation intensity probe located inside the environmental simulation chamber. The multi-mode rain system is used to simulate humid environments and raindrop impact; The automatic condensation system is used to simulate condensation phenomena in high humidity environments; The central control unit is used to set and regulate the operating parameters of the entire testing device.

2. The testing apparatus according to claim 1, characterized in that, The rotatable platform includes: a telescopic rod, a pressure nut, a tray, a rotating motor, and a three-jaw mechanism; The bottom end of the telescopic rod is fixed to the center position of the bottom of the environmental simulation chamber; The pressure nut is used to fix the telescopic rod after it has been adjusted to the set height. The bottom of the tray is equipped with a support column, the bottom of which engages with a rotating motor. The test sample is fixed to the surface of the tray with tape to prevent it from being thrown out during rotation. The rotating motor is used to drive the tray to rotate, ensuring that the test materials placed on the tray are affected equally in all directions within the horizontal plane. The three-claw mechanism includes three identical rods, one end of each rod is hinged to a telescopic rod, and the other end is connected to the bottom of the tray. Each rod has a hinge in the middle section. The tray can be tilted by manually adjusting the bending angle of each rod and adjusting the tightness of the hinge.

3. The testing apparatus according to claim 1, characterized in that, The multi-mode rain system includes: several atomizing nozzle groups, several drip pipes, a water tank, a water pump, and a drain outlet; Several atomizing nozzle groups and several drip pipes are fixed to the top of the environmental simulation chamber, located above the rotatable platform; The water tank is connected to the atomizing nozzle assembly and the drip pipe via a water pipe; The water pump is used to transport water from the water tank to the water pipe; The drain outlet is located at the bottom of the environmental simulation chamber and is connected to the water tank; The atomizing nozzle assembly generates water mist with a particle size of <100μm and a humidity control range of 20%-100%RH; several drip tubes form a drip tube array, with a raindrop simulation frequency of 5-60 drops / min, and the drop height is changed by adjusting the length of the telescopic rod.

4. The testing apparatus according to claim 2, characterized in that, The automatic condensation system includes a condensation plate fixed on the tray and a temperature and humidity sensor. The temperature and humidity sensor is used to collect temperature and humidity data, which is processed by the central control unit to control the condensation plate to cool down. The temperature difference control accuracy is ±0.5℃, thereby realizing condensation on the surface of the sample being tested.

5. The testing apparatus according to claim 1, characterized in that, The central control unit includes: a multi-factor coupling program module for setting any combination and duration of wind, sun exposure, rain, and condensation; and a long-cycle cyclic control module that supports continuous testing for ≥30 days and can simulate day-night alternation environments.

6. The testing apparatus according to claim 5, characterized in that, The long-cycle cyclic control module can be programmed with periodic changes, including: UV light intensity changing according to the solar diurnal cycle curve; and wind and rain parameters simulating sudden changes in weather conditions based on meteorological data.

7. The testing apparatus according to claim 1, characterized in that, The environmental simulation chamber has a sample entry / exit door and a ventilation opening on its side.

8. The testing apparatus according to claim 1, characterized in that, The temperature control air system (8) is located on the four side walls of the environmental simulation chamber, with the air outlet facing the rotatable platform. The temperature adjustment range of the temperature control air system (8) is 25°C to 80°C, and the wind speed is continuously adjustable in the range of 0.5-15m / s.

9. The testing apparatus according to claim 1, characterized in that, The ultraviolet light source array has a spectral range of 280-400 nm and an irradiance of 0.1-1.5 W / m². 2 Adjustable within the range, including independent control modules for UVA / UVB bands.

10. A method based on the testing apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: First, the radiation cooling material sample to be tested is fixed on the tray of the rotatable platform 2. The environmental parameters are determined according to the testing requirements, including temperature, wind speed, ultraviolet intensity, humidity, raindrop frequency, tray rotation speed, and tray angle, as detailed below: The tray speed and tray angle can be adjusted by starting the rotating motor of the rotatable platform and adjusting the angle of the three-jaw mechanism; Start the temperature control unit, set the heating temperature to heat the air, and turn on the adjustable fan to blow air onto the tray from four directions at a fixed speed. The ultraviolet light source array is turned on, and ultraviolet radiation is carried out at a constant light intensity through the light intensity controller. The radiation intensity information is collected through the radiation intensity probe and transmitted to the central control unit. The intensity of the ultraviolet light source array in the UVA / UVB band is adjusted according to the feedback of the radiation intensity information. Turn on the water pump to start water circulation. Water forms water mist through the atomizing nozzle assembly. Adjust the humidity of the device. Some water drips directly onto the sample being tested through the drip pipe to simulate rain. By adjusting the power of the water pump, the frequency of water droplets falling at different frequencies can be controlled. Temperature and humidity data collected by temperature and humidity sensors are transmitted to the central control unit for feedback adjustment, thereby stabilizing the temperature and humidity within the required range. Based on the multi-factor coupling program module and long-cycle loop control module, the required test temperature, wind speed, ultraviolet intensity, humidity, raindrop frequency, tray rotation speed and tray angle are set, and the duration and cycle of each environmental parameter are set. After the test is completed, the test sample is taken out, and the performance of the radiative cooling material after the aging treatment device is tested through the performance testing device.

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