Indoor simulation test device and method for soaking performance of cooling material

Abstract

The invention discloses a cooling material soaking performance indoor simulation test device and method, and belongs to the technical field of simulation test. The indoor simulation test device for the soaking performance of the cooling material comprises a light source, a first temperature measurement sensor, a second temperature measurement sensor and a hollow cylindrical shell, the hollow cylindrical shell comprises a sunny side and a shady side, and the light source is arranged on one side of the sunny side; the first temperature measuring sensor is arranged on the inner wall of the sunny side of the hollow cylindrical shell, and the second temperature measuring sensor is arranged on the inner wall of the shady side of the hollow cylindrical shell. According to the indoor simulation test device and method for the soaking performance of the temperature increasing and reducing material, the simulation test is carried out indoors, the influence of factors such as weather change can be avoided, and the influence is not limited by sunshine duration, so that the test period is shortened, and the defects of outdoor performance test experiments are overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of simulation testing, and in particular relates to an indoor simulation testing device and method for the heat-dissipating performance of a cooling material. Background Art

[0002] Overheating of power equipment is an important cause of its failure and shortened life. The insulation and structure of power equipment are closely related to its heat dissipation performance. Excessively high operating temperature will accelerate the aging of insulation materials, thereby shortening the service life of the equipment. Therefore, heat dissipation is related to the safe and stable operation of power equipment and the continuous and reliable power supply of the power grid. In addition to affecting its operating load capacity, the heat dissipation of power equipment will also affect the structure of the equipment. Strong sunshine weather causes the shell temperature of equipment such as GIS / GIL to rise, forming a temperature difference between the sunny and shady sides of the shell, causing asymmetric thermal expansion to cause shell deformation, which in turn causes cracks and even affects the insulation of the equipment. If cooling materials, such as cooling paint or cooling film, are used on the shell of equipment such as GIS / GIL, the power equipment can dissipate heat efficiently.

[0003] In terms of testing and evaluating the cooling performance of cooling materials, laboratories can currently only evaluate certain aspects of the material's performance through indicators such as solar reflectance, near-infrared reflectance, and hemispherical emissivity. Outdoor simulation experiments are usually used to investigate the comprehensive performance of cooling materials. Outdoor simulation experiments simulate the actual service status of the material by placing the cooling material in a real outdoor lighting environment, and then record the temperature changes at different locations on the outdoor environment and the surface of the cooling material to evaluate the cooling performance and heat-dissipating performance of the material. However, this method requires a relatively long time period and is obviously affected by factors such as sunshine duration and weather changes. It is impossible to quickly and efficiently conduct a comprehensive evaluation of the material's heat-dissipating performance and life prediction.

[0004] Therefore, how to quickly and effectively evaluate and test the heat dissipation performance of cooling materials in the laboratory is an urgent problem to be solved in the rapid development of cooling materials. Efficient cooling and heat dissipation materials are the key to ensuring the safe, stable and reliable operation of power equipment, and are of great significance to ensuring reliable power supply to the power grid. Summary of the invention

[0005] Therefore, the present invention provides an indoor simulation test device and method for the heat-averaging performance of cooling materials. By conducting simulation tests indoors, the influence of factors such as weather changes can be avoided and the test period is not limited by the duration of sunshine, thereby shortening the test cycle and making up for the shortcomings of outdoor performance test experiments. It fills the gap in the existing heat-averaging performance test device and method for cooling materials, and can provide support for material selection for power grid engineering construction, performance design, evaluation and life prediction of cooling materials, etc., thereby improving the full life cycle of power grid equipment and providing guarantee for the safe and reliable operation of the power grid.

[0006] To this end, the present invention provides the following technical solutions.

[0007] In a first aspect, the present invention provides an indoor simulation test device for heat-dissipating performance of a cooling material, comprising a light source, a first temperature sensor, a second temperature sensor and a hollow cylindrical shell;

[0008] The hollow cylindrical shell includes a sun-facing side and a shaded side, and the light source is arranged on the sun-facing side; the first temperature sensor is arranged on the inner wall of the sun-facing side of the hollow cylindrical shell, and the second temperature sensor is arranged on the inner wall of the shaded side of the hollow cylindrical shell.

[0009] Furthermore, the light source is arranged obliquely above the sun-facing side, forming an angle of 30° to 60° with the horizontal plane, and the light source is 0.5 to 0.8 m away from the hollow cylindrical shell.

[0010] Furthermore, the first temperature measuring sensor is provided in plurality;

[0011] A plurality of first temperature measuring sensors are evenly arranged on the inner wall of the sun-facing side;

[0012] Optionally, five first temperature measuring sensors are provided and are arranged on the inner wall of the sun-facing side using a five-point method.

[0013] Furthermore, the second temperature measuring sensor is provided in plurality;

[0014] A plurality of second temperature measuring sensors are evenly arranged on the inner wall of the shady side;

[0015] Optionally, five second temperature measuring sensors are provided and are arranged on the inner wall of the shady side using a five-point method.

[0016] Furthermore, it also includes a temperature collector, and the first temperature sensor and the second temperature sensor transmit the monitored temperature data to the temperature collector.

[0017] Furthermore, it also includes a slide rail, which is parallel to the axis of the hollow cylindrical shell. The light source is arranged on the slide rail and moves along the slide rail.

[0018] Furthermore, it also includes a light source controller, which can adjust the heating power of the light source, set the lighting time of the light source and the moving speed of the light source on the slide rail, so as to realize the adjustable lighting intensity and lighting time of the light source and the movable position of the light source.

[0019] The combination of light source, slide rail and light source controller can simulate outdoor lighting conditions (the outdoor sun will be in different positions and produce different intensities of solar radiation due to the change of time). The light intensity of the light source and the setting of the lighting time can be adjusted to simulate the strong light at noon on a sunny day outdoors (1000W / m 2 ) environment or cloudy weather (600W / m 2) environment, the illumination intensity and illumination time can be flexibly adjusted according to the specific service environment of the material to be tested, and the illumination angle of the light source can be adjusted by moving the light source on the slide rail.

[0020] Furthermore, the hollow cylindrical shell satisfies at least one of the following conditions:

[0021] (1) Made of stainless steel;

[0022] (2) The hollow cylindrical shell is a hollow cylindrical shell;

[0023] Preferably, the bottom radius of the hollow cylindrical shell is 20 to 40 cm, and the side height is 80 to 120 cm;

[0024] (3) The hollow cylindrical shell is a hollow square cylindrical shell;

[0025] Preferably, the size of the hollow square column shell is (30-100) cm×(30-100) cm×(30-100) cm; preferably 50 cm×50 cm×50 cm;

[0026] (4) The wall thickness of the hollow cylindrical shell is 2 to 5 mm;

[0027] (5) The light source consists of 9 xenon lamp assemblies arranged in a 3×3 linear array.

[0028] The material, shape and size of the hollow cylindrical shell can be flexibly replaced according to the different requirements of the material to be tested.

[0029] Furthermore, the first temperature sensor and the second temperature sensor are wireless temperature sensors, and the temperature collector is a wireless temperature collector. The wireless temperature sensor and the wireless temperature collector are connected via wireless signals. After the wireless temperature sensor collects temperature data, it is transmitted to the wireless temperature collector in real time for data storage and processing.

[0030] Furthermore, the light source controller and the temperature collector are both connected to a power source.

[0031] In a second aspect, the present invention provides an indoor simulation test method for heat dissipation performance of a cooling material, using the indoor simulation test device for heat dissipation performance of a cooling material, comprising the following steps:

[0032] The cooling material is placed on the outer surface of the hollow cylindrical shell, and the light source is turned on to simulate the target lighting conditions;

[0033] The first temperature sensor and the second temperature sensor transmit the monitored temperature data to the temperature collector for data storage and analysis, and draw the temperature change curves of the sun-facing side and the shade-facing side over time and the average temperature difference curve of the sun-facing side and the shade-facing side over time, respectively, to evaluate and characterize the heat-dissipating performance of the cooling material.

[0034] Furthermore, during the test, the indoor temperature was controlled between 20 and 25°C, and the indoor humidity was controlled between 40% and 70%.

[0035] Furthermore, at least one of the following conditions is met:

[0036] (1) The light source spectrum adopts the AM1.5G standard solar spectrum;

[0037] (2) The light source irradiance can be adjusted from 600 to 1200 W / m 2 ;

[0038] (3) The effective spectrum of the light source is 400-1100nm;

[0039] (4) The light source moving speed is 0-10m / h.

[0040] Furthermore, the cooling material can be arranged on the outer surface of the hollow cylindrical shell by spraying or pasting. For example, if the cooling material to be tested is in the form of a coating, the cooling coating can be sprayed on the surface of the shell, and the performance test can be carried out after the coating is cured; after the test, the coating to be tested on the surface can be removed by physical methods or organic solvents. If the cooling material to be tested is in the form of a film, the cooling film can be pasted on the outer surface of the hollow cylindrical shell, and then the performance test can be carried out. After the test is completed, the cooling film can be easily removed. The entire test process is simple, convenient, efficient and has good repeatability.

[0041] Furthermore, if the cooling material to be tested is in the form of a coating, before spraying the cooling material onto the outer surface of the hollow cylindrical shell, the outer surface of the hollow cylindrical shell is polished or sandblasted to improve the interface compatibility between the cooling material to be tested and the hollow cylindrical shell.

[0042] The technical solution of the present invention has the following advantages:

[0043] 1. The indoor simulation test device for the heat-averaging performance of the cooling material of the present invention comprises a light source, a first temperature sensor, a second temperature sensor and a hollow cylindrical shell; the hollow cylindrical shell comprises a sun-facing side and a shaded side, and the light source is arranged on the sun-facing side; the first temperature sensor is arranged on the inner wall of the sun-facing side of the hollow cylindrical shell, and the second temperature sensor is arranged on the inner wall of the shaded side of the hollow cylindrical shell.

[0044] Compared with the existing outdoor cooling material heat-dissipating performance test device and method, the present invention proposes an indoor simulation test device for the heat-dissipating performance of cooling materials. The heat-dissipating performance of cooling materials can be quickly and effectively tested by this device, and its operation is relatively simple. It can realize comparative studies, rapid evaluations, and predictive studies on the heat-dissipating performance of cooling materials under simulated outdoor lighting conditions in the laboratory. The present invention has good simulation, acceleration, and reproducibility, and provides support for material selection, cooling material performance design, evaluation, and life prediction for power grid engineering construction, improving the full life cycle of power grid equipment, and providing guarantees for safe and reliable operation of the power grid.

[0045] 2. The light source is set obliquely above the sun-facing side, at an angle of 30° to 60° with the horizontal plane, and the light source is 0.5 to 0.8m away from the hollow cylindrical shell. The angle of 30° to 60° with the horizontal plane makes the lighting conditions more in line with the actual illumination conditions. The set illumination distance can provide appropriate illumination intensity for the sun-facing side, avoiding excessive local illumination intensity or overly concentrated illumination range caused by too close distance, and avoiding insufficient local illumination intensity or overly dispersed illumination range caused by too far distance.

[0046] 3. There are multiple first temperature sensors, which are evenly arranged on the inner wall of the sun-facing side; there are multiple second temperature sensors, which are evenly arranged on the inner wall of the shady side. Setting multiple temperature sensors and taking the average temperature value can reduce errors and improve accuracy.

[0047] 4. The indoor simulation test device for the heat-dissipating performance of cooling materials also includes a slide rail, which is parallel to the axis of the hollow cylindrical shell. The light source is arranged on the slide rail and moves along the slide rail. The light source can be moved, so that each point can be heated evenly, which is closer to the real condition and the test result is more accurate.

[0048] 5. The bottom radius of the hollow cylindrical shell is 20-40 cm, and the side height is 80-120 cm. The size of the hollow square column shell is (30-100) cm×(30-100) cm×(30-100) cm; preferably 50 cm×50 cm×50 cm. The use of the shell within the scope of the present invention can avoid the influence of too large or too small size on the accuracy and effectiveness of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 Schematic diagram of an indoor simulation test device for the heat-dissipating performance of the cooling material of the present invention;

[0051] Figure 2 It is a side schematic diagram of an indoor simulation test device for the heat-dissipating performance of a cooling material of the present invention;

[0052] Figure 3 This is a schematic diagram of the arrangement of the first temperature sensor in Example 1;

[0053] Figure 4 The experimental results of the simulation test of Example 2 are shown below:

[0054] Figure 5 The experimental results of the simulation test of Example 3 are shown below;

[0055] Figure 6 The following are the experimental results of the simulation test of Example 4.

[0056] Reference numerals:

[0057] 1-slide rail; 2-light source; 3-light source controller; 4-first temperature sensor; 5-second temperature sensor; 6-temperature collector; 7-power supply; 8-hollow cylindrical shell; 801-sun side; 802-shaded side. DETAILED DESCRIPTION

[0058] The following examples are provided for a better understanding of the present invention, but are not intended to limit the best mode of implementation, nor to limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention.

[0059] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in the field can be used. If no manufacturer is specified for the reagents or instruments used, they are all conventional reagent products that can be obtained commercially.

[0060] Example 1

[0061] This embodiment provides an indoor simulation test device for the heat dissipation performance of a cooling material. Figure 1 , Figure 2 As shown, it includes a light source 2, a first temperature sensor 4, a second temperature sensor 5 and a hollow cylindrical shell 8; the hollow cylindrical shell 8 is placed flat on the test bench, the hollow cylindrical shell 8 includes a sun-facing side 801 and a shady side 802, and the light source 2 is arranged on the side of the sun-facing side 801; the first temperature sensor 4 is arranged on the inner wall of the sun-facing side 801 of the hollow cylindrical shell, and the second temperature sensor 5 is arranged on the inner wall of the shady side 802 of the hollow cylindrical shell.

[0062] The light source 2 is arranged obliquely above the sun-facing surface 801 , forming an angle of 45° with the horizontal plane, and 0.5 m away from the surface of the hollow cylindrical shell 8 .

[0063] There are five first temperature measuring sensors 4, which are arranged on the inner wall of the sun-facing surface 801 using a five-point method (i.e., top, bottom, left, right, and center). Figure 3 As shown, a first temperature sensor 4 is respectively arranged at the center of the sun-facing surface 801, the midpoint between the center and the left and right boundaries, and the midpoint between the center and the upper and lower boundaries. Five second temperature sensors 5 are arranged on the inner wall of the shady surface 802 using a five-point method.

[0064] The indoor simulation test device also includes a temperature collector 6 , and the first temperature sensor 4 and the second temperature sensor 5 transmit the monitored temperature data to the temperature collector 6 .

[0065] The indoor simulation test device also includes a slide rail 1 and a light source controller 3. The slide rail 1 is axially parallel to the hollow cylindrical housing 8, and the light source 2 is arranged on the slide rail 1 and moves along the slide rail 1. The light source controller 3 can adjust the heating power of the light source 2, set the illumination time of the light source 2 and the moving speed of the light source 2 on the slide rail 1, so as to realize the adjustable illumination intensity and illumination time of the light source 2 and the movable position of the light source.

[0066] The hollow cylindrical shell 8 of this embodiment is a hollow cylindrical shell made of stainless steel; the bottom radius of the hollow cylindrical shell is 30 cm, and the side height is 100 cm; the wall thickness of the hollow cylindrical shell 8 is 2 mm.

[0067] In this embodiment, the light source is composed of 9 xenon lamp assemblies arranged in a 3×3 linear array.

[0068] In this embodiment, the first temperature sensor 4 and the second temperature sensor 5 are wireless temperature sensors, and the temperature collector 6 is a wireless temperature collector. The wireless temperature sensor and the wireless temperature collector are connected via wireless signals. After the wireless temperature sensor collects temperature data, it is transmitted to the wireless temperature collector in real time for data storage and processing.

[0069] The light source controller 3 and the temperature collector 6 are both connected to a power source 7 .

[0070] Example 2

[0071] This embodiment provides an accelerated simulation test method for the heat dissipation performance of a cooling material under constant light conditions. The simulation test is performed using the device of Embodiment 1, and includes the following steps:

[0072] During the test, the indoor temperature was controlled between 20 and 25°C, the indoor humidity was controlled between 40% and 70%, the light source spectrum adopted the AM1.5G standard solar spectrum, and the effective spectrum band was 400 to 1100nm; according to the actual light intensity data of a certain area, the light intensity of the simulated light source was set to 600W / m 2 , the illumination time is 6h to simulate the illumination conditions under outdoor cloudy conditions and the light source moving speed is given to be 1m / h. Then, cooling material is pasted on the surface of the equipment casing as the experimental group for heat uniformity performance test.

[0073] After the test is completed and the test data of the heat-isolating performance of the cooling material is obtained, the cooling material on the outer surface of the hollow cylindrical shell is removed by physical methods, and the same test is carried out with the outer surface of the hollow cylindrical shell not covered with cooling material as a blank group.

[0074] After the test, the heat dissipation performance of the cooling material was characterized and evaluated by comparing the average temperature difference between the sun-facing side and the shade-facing side measured by the blank group and the experimental group over time. The experimental results are as follows: Figure 4 shown.

[0075] Example 3

[0076] This embodiment provides an accelerated simulation test method for the heat-dissipating performance of various cooling materials under constant light conditions. The simulation test is performed using the device of Embodiment 1, including the following steps:

[0077] During the test, the indoor temperature was controlled between 20 and 25°C, the indoor humidity was controlled between 40% and 70%, the light source spectrum used the AM1.5G standard solar spectrum, and the effective spectrum band was 400 to 1100nm. According to the actual light intensity data of a certain area, the light intensity of the simulated light source was set to 600W / m 2 , the illumination time is 6h to simulate the illumination conditions under outdoor cloudy conditions and the light source moving speed is given to be 1m / h. Then, cooling material A is coated on the surface of the equipment casing as experimental group 1 to carry out heat uniformity performance test.

[0078] After the test is completed and the test data of the heat-isolating performance of the cooling material is obtained, the cooling material on the outer surface of the hollow cylindrical shell is removed by a chemical solvent, and the cooling material B is coated on the outer surface of the hollow cylindrical shell as experimental group 2 for heat-isolating performance test.

[0079] By analogy, the heat-isolating performance of various cooling materials can be tested and test data can be obtained.

[0080] After the test, the heat dissipation performance of different cooling materials was characterized and evaluated by comparing the average temperature difference between the sun-facing side and the shaded side obtained from different experimental groups over time. The experimental results are as follows: Figure 5 shown.

[0081] Example 4

[0082] This embodiment provides an accelerated simulation test method for the heat-dissipating performance of the same cooling material under different lighting conditions. The simulation test is performed using the device of Embodiment 1, including the following steps:

[0083] During the test, the indoor temperature was controlled between 20 and 25°C, the indoor humidity was controlled between 40% and 70%, the light source spectrum adopted the AM1.5G standard solar spectrum, and the effective spectrum band was 400 to 1100nm; according to the actual light intensity data of a certain area, the light intensity of the simulated light source was set to 1000W / m 2 , the illumination time is 6h to simulate the strong light conditions outdoors at noon on a sunny day and the light source moving speed is given to be 1m / h. Then, cooling material is pasted on the surface of the equipment shell as experimental group 1 to carry out heat uniformity performance test.

[0084] After the test is completed and the test data of the cooling material's heat dissipation performance is obtained, the cooling material on the equipment shell is removed by physical methods and the same cooling material is repeatedly prepared on the outer surface of the hollow cylindrical shell. According to the characteristics of light intensity in different regions, the light intensity of the simulated light source is adjusted to 600W / m 2 The illumination time is 6 hours to simulate the illumination conditions under outdoor cloudy conditions, and the moving speed of the light source remains unchanged. This is the experimental group 2 for the heat uniformity performance test.

[0085] By analogy, the heat-dissipating performance test data of the same cooling material under different lighting conditions can be obtained.

[0086] After the test, the influence of different light intensities on the heat-dissipating performance of the same cooling material was characterized and evaluated by comparing the average temperature difference between the sun-facing side and the shaded side obtained from different experimental groups over time. The experimental results are as follows: Figure 6 shown.

[0087] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. An indoor simulation test device for heat dissipation performance of cooling materials, characterized in that: It includes a light source, a first temperature sensor, a second temperature sensor and a hollow cylindrical shell; The hollow cylindrical shell includes a sun-facing side and a shaded side, and the light source is arranged on the sun-facing side; the first temperature sensor is arranged on the inner wall of the sun-facing side of the hollow cylindrical shell, and the second temperature sensor is arranged on the inner wall of the shaded side of the hollow cylindrical shell.

2. The indoor simulation test device for heat dissipation performance of cooling materials according to claim 1, characterized in that: The light source is arranged obliquely above the sun-facing side, forming an angle of 30° to 60° with the horizontal plane, and the light source is 0.5 to 0.8 m away from the hollow cylindrical shell.

3. The indoor simulation test device for heat dissipation performance of cooling materials according to claim 1, characterized in that: The first temperature measuring sensor is provided in plurality; A plurality of first temperature measuring sensors are evenly arranged on the inner wall of the sun-facing side.

4. The indoor simulation test device for heat dissipation performance of cooling materials according to claim 1, characterized in that: The second temperature measuring sensor is provided in plurality; A plurality of second temperature measuring sensors are evenly arranged on the inner wall of the shady side.

5. The indoor simulation test device for heat dissipation performance of cooling materials according to any one of claims 1 to 4, characterized in that: It also includes a temperature collector, and the first temperature sensor and the second temperature sensor transmit the monitored temperature data to the temperature collector.

6. The indoor simulation test device for heat dissipation performance of cooling materials according to any one of claims 1 to 4, characterized in that: It also includes a slide rail, which is parallel to the axis of the hollow cylindrical shell. The light source is arranged on the slide rail and moves along the slide rail.

7. The indoor simulation test device for heat dissipation performance of cooling materials according to any one of claims 1 to 4, characterized in that: The hollow cylindrical shell satisfies at least one of the following conditions: (1) Made of stainless steel; (2) The hollow cylindrical shell is a hollow cylindrical shell; (3) The hollow cylindrical shell is a hollow square cylindrical shell; (4) The wall thickness of the hollow cylindrical shell is 2 to 5 mm; (5) The light source consists of 9 xenon lamp assemblies arranged in a 3×3 linear array.

8. An indoor simulation test method for heat dissipation performance of cooling materials, characterized in that: The indoor simulation test device for heat dissipation performance of cooling materials according to any one of claims 1 to 7 is used, comprising the following steps: The cooling material is placed on the outer surface of the hollow cylindrical shell, and the light source is turned on to simulate the target lighting conditions; The first temperature sensor and the second temperature sensor transmit the monitored temperature data to the temperature collector for data storage and analysis, and respectively draw the temperature change curves of the sunny side and the shady side over time and the average temperature difference curve of the sunny side and the shady side over time.

9. The indoor simulation test method for heat dissipation performance of cooling materials according to claim 8, characterized in that: During the test, the indoor temperature is controlled between 20 and 25°C, and the indoor humidity is controlled between 40% and 70%.

10. The indoor simulation test method for heat dissipation performance of cooling materials according to claim 8, characterized in that: At least one of the following conditions is met: (1) The light source spectrum adopts the AM1.5G standard solar spectrum; (2) The light source irradiance can be adjusted from 600 to 1200 W / m 2 ; (3) The effective spectrum of the light source is 400-1100nm; (4) The light source moving speed is 0-10m / h.

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