Device and method for testing service performance of photo-thermal power generation solar energy absorption coating

Abstract

The invention provides a photo-thermal power generation solar energy absorption coating service performance test device and method, and relates to the technical field of photo-thermal power generation. The method solves the problem that the technical blank of the comprehensive evaluation method for the service characteristics of the coating under the synergistic effect of factors such as cold and hot alternation, sun illumination and sand wind is obvious for the service characteristic evaluation method for the tower-type photo-thermal power generation solar energy absorbing coating. The device comprises a test box, a water tank, an air blower and a control box, the water tank, the air blower and the control box are all connected with the test box, a xenon arc lamp is installed at the top end in the test box, a multi-layer test rack is arranged in the middle of the test box, a heating module is arranged at the bottom of the test box, a spraying pipe is arranged between the xenon arc lamp and the test rack, and the test rack is obliquely arranged relative to the bottom face of the test box. A sand containing tray is placed on the heating module, and an air blowing opening is formed in the side wall of the bottom of the test box. The method is mainly used for evaluating the service characteristics of the solar absorbing coating.

Description

Technical Field

[0001] This invention relates to the field of solar thermal power generation technology, and in particular to a testing device and method for the service performance of solar thermal power generation solar energy absorption coatings. Background Technology

[0002] Tower-type solar thermal power generation technology utilizes heliostats to track the sun and reflect sunlight to an absorber at the top of the tower, converting solar energy into heat. The solar absorption coating on the absorber surface has a high absorptivity within the solar spectrum to maximize solar energy capture and ensure the absorber's heat absorption efficiency; it is the core material for achieving photothermal conversion. Depending on the operating conditions of the tower-type solar thermal power absorber, its surface solar absorption coating must not only withstand temperatures no lower than 600℃ but also maintain good adhesion and absorptivity under daily thermal cycling, wind and sand erosion, and ultraviolet radiation. Furthermore, because the absorber is installed at a height of over 200 meters, maintaining its surface coating is more challenging than that of conventional ground-based collectors. Therefore, understanding the service characteristics of the solar absorption coating is crucial for understanding the coating's performance degradation patterns, predicting its lifespan, and developing maintenance plans.

[0003] Currently, there is limited research on evaluation methods for the service characteristics of solar absorption coatings in tower-type concentrated solar power generation. Related studies mainly focus on changes in optical performance, such as the attenuation of coating absorptivity at high temperatures. There are no publicly reported comprehensive evaluation methods for coating service characteristics under the combined effects of factors such as alternating hot and cold temperatures, sunlight, and wind and sand, indicating a significant technological gap. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device and method for the service performance of solar absorber coatings in tower-type concentrated solar power (CSP) systems. By simulating the operating conditions of the absorber, the service characteristics of the solar absorber coating are evaluated to assess coating performance degradation, assess coating performance, and formulate operation and maintenance plans. This invention includes a testing device for the service characteristics of solar absorber coatings and a method for evaluating the service characteristics of coatings under the combined effects of wind and sand erosion, thermal shock, solar radiation, and rain, which can effectively examine the performance changes of solar absorber coatings under service conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a test device for the service performance of a tower-type solar thermal power generation solar absorption coating, comprising a test chamber, a water tank, a blower, and a control box, wherein the water tank, the blower, and the control box are all connected to the test chamber; The test chamber is equipped with a xenon arc lamp at the top, a multi-layer test rack in the middle, and a heating module at the bottom. A spray pipe is provided between the xenon arc lamp and the test rack. Both the spray pipe and the test rack are connected to the inner wall of the test chamber. The test rack is inclined relative to the bottom surface of the test chamber. The test rack is composed of longitudinally arranged grids connected with transversely arranged angle steel. A sand-holding tray is placed on the heating module. An air outlet is provided on the bottom side wall of the test chamber. The inlet side of the air outlet is connected to a blower, and a stainless steel baffle is hinged to the outlet side. A drain outlet is provided at the bottom of the test chamber. A submersible pump is installed at the bottom of the water tank, and the submersible pump is connected to the spray pipe; The xenon arc lamp, submersible pump, blower, and heating module are electrically connected to the control box.

[0006] Furthermore, the xenon arc lamp uses a daylight-type filter, and the bulb transmittance of the xenon arc lamp is ≥92%.

[0007] Furthermore, multiple stainless steel nozzles are installed on the spray pipe.

[0008] Furthermore, the test rack is tilted at 30° relative to the bottom surface of the test chamber, and has four layers.

[0009] Furthermore, the angle steel has two layers, one layer connected to the middle of the grille and the other layer connected to the bottom of the grille, and multiple drainage holes are provided on one side of the angle steel along its length.

[0010] Furthermore, the water tank has a water inlet at the top and a water outlet on the bottom side wall.

[0011] Furthermore, the outer wall of the control box is equipped with a display panel and multiple control switches.

[0012] Furthermore, the inner wall, grating, angle steel, sand tray, and water tank of the test chamber are all made of stainless steel.

[0013] Furthermore, the stainless steel is a nickel-based high-temperature alloy or a cobalt-based high-temperature alloy.

[0014] A method for testing the service performance of a solar absorber coating for tower-type concentrated solar power generation, using the aforementioned testing device for the service performance of a solar absorber coating for tower-type concentrated solar power generation, specifically includes the following steps: S1. Test plate preparation: S11. Raw material preparation: Select test plates of suitable material and size, and in sufficient quantity; S12. Degreasing: Use a non-polar solvent to wipe the surface of the test panel to remove oil. After wiping, use dry, oil-free compressed air to blow the surface of the test panel to remove the cloth fibers that fall off during the degreasing process. After blowing, use a strong flashlight to shine a horizontal light obliquely on the surface of the test panel to check and ensure that there are no cloth fibers or other dirt residues on the surface of the test panel. S13. Surface treatment: The surface of the test plate shall be sandblasted to achieve a surface roughness of Rz10~25μm; S14. Spray-coated test panel: The solar energy absorbing coating is sprayed onto the surface of the test panel using an air spraying method, and then the coating is cured by heating. S15. Avoid direct sunlight and allow the test plate to stand for at least 24 hours. S2. Preparation of test sand and water: S21. Sand preparation: Based on the location of the test object, take sand samples from the corresponding area, dry the sand, filter it, and set it aside for later use. S22. Test water preparation: Based on the composition and pH value of rainwater in the area where the test object is located, test water is prepared using a buffer solution or rainwater is directly collected from the corresponding area for later use. S3. Service performance test: S31. Place sand in the sand tray and pour the test water into the water tank; S32. Divide the test plate into two parts, one part being the test plate and the other part being the control plate, and place the test plate on the test rack; S33. According to the test requirements, the xenon arc lamp, submersible pump, blower and heating module are controlled by the control box to simulate sunlight exposure, rain erosion, wind and sand erosion and adjust the ambient temperature to carry out coating service performance tests. S34. After the test, remove the test plate, collect the sand from the sand tray, and open the drain to drain the test water from the test chamber. S35. According to relevant testing standards, test the adhesion and absorption rate of the comparison panel; test the adhesion, paint film aging and absorption rate of the test panel, compare the changes in adhesion and absorption rate of the comparison panel and the test panel, and determine the service performance of the coating of the test panel under the specified time by combining the degree of paint film aging.

[0015] Compared with the prior art, the beneficial effects of the tower-type solar thermal power generation solar absorption coating service performance testing device and method described in this invention are: 1. This invention provides a test device and method for evaluating the service performance of solar absorption coatings in tower-type solar thermal power generation. It specifies in detail the evaluation items, test parameters, and the composition of the test device, filling the gap in the evaluation method for the service characteristics of solar absorption coatings.

[0016] 2. The tower-type solar thermal power generation solar absorption coating service performance test device and method described in this invention can determine key test parameters such as test temperature, temperature adjustment frequency, and sunlight duration in the service characteristic test of solar absorption coating based on actual engineering application conditions, according to the sunshine duration and diurnal operating temperature difference in different seasons. The test device of this invention can realize wind and sand circulation purging and rainfall simulation, and the wind force and rainfall can be freely adjusted. The rainwater composition can be autonomously adjusted or directly collected from the corresponding area for use, thereby maximally restoring the operating conditions of the solar absorption coating and obtaining data to effectively guide the operation and maintenance of the solar absorption coating on the surface of the absorber. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of a tower-type solar thermal power generation solar absorption coating service performance testing device according to the present invention; Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a side view of the multi-layer test rack in the test chamber described in this invention; Figure 4 This is a schematic diagram of the structure of the test frame described in this invention; Figure 5 This is a cross-sectional view of the angle steel described in this invention; In the diagram: 1-Test chamber; 2-Water tank; 3-Blower; 4-Control box; 11-Xenon arc lamp; 12-Spray pipe; 13-Test rack; 14-Sand tray; 15-Heating module; 16-Stainless steel baffle; 17-Drain outlet; 131-Grate; 132-Angle steel; 133-Drain hole 21-Submersible pump; 22-Water tank inlet; 23-Water tank outlet; 41-Display panel; 42-Control switch. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0019] I. Detailed Implementation Method 1, see [link / reference] Figure 1-5This embodiment describes a test device for the service performance of a tower-type solar thermal power generation solar absorption coating, which includes a test chamber 1, a water tank 2, a blower 3, and a control box 4. The water tank 2, the blower 3, and the control box 4 are all connected to the test chamber 1. The test chamber 1 is equipped with a xenon arc lamp 11 at the top, a multi-layer test rack 13 in the middle, and a heating module 15 at the bottom. A spray pipe 12 is provided between the xenon arc lamp 11 and the test rack 13. Both the spray pipe 12 and the test rack 13 are connected to the inner wall of the test chamber 1. The test rack 13 is inclined relative to the bottom surface of the test chamber 1. The test rack 13 is composed of longitudinally arranged grids 131 connected with transversely arranged angle steel 132. The angle steel 132 is used to place the test plate. A sand tray 14 is placed on the heating module 15. The bottom side wall of the test chamber is provided with an air vent. The inlet side of the air vent is connected to a blower 3, and the top of the outlet side is hinged with a stainless steel baffle 16. A drain outlet 17 is opened at the bottom of the test chamber. The test chamber 1 is provided with a door for placing or removing components and sand, etc., after opening. The water tank 2 is equipped with a submersible pump 21 at the bottom, and the submersible pump 21 is connected to the spray pipe 12; The xenon arc lamp 11, submersible pump 21, blower 3 and heating module 15 are electrically connected to the control box 4.

[0020] The submersible pump 21 is made of plastic and features adjustable outlet pressure and flow rate. When the submersible pump 21 is turned on, test water is sprayed onto the test plate surface through multiple stainless steel nozzles mounted on the spray pipe 12. Adjusting the submersible pump pressure and flow rate can simulate different rainfall levels, such as heavy rain, moderate rain, and light rain. Adjusting the composition of the test water can simulate rainwater from different regions, or corrosive media can be added to accelerate corrosion tests. The blower 3 is frequency-converted, capable of adjusting the airflow. Air is blown in from one side of the bottom of the test chamber 1, creating a circulating airflow inside. Simultaneously, this airflow causes the sand in the sand tray 14 to be blown onto the surface of the test plate, simulating the effects of natural wind blowing and sand erosion. By adjusting the airflow of the blower 3, the intensity of the sand erosion can be adjusted to adapt to the simulated sand erosion characteristics of different regions. A stainless steel baffle 16 is hinged to the outlet side of the air blower. When the blower 3 is turned on, the stainless steel baffle 16 is opened by the wind. When the blower 3 is turned off, the stainless steel baffle 16 falls naturally under gravity and closes the air blower.

[0021] Preferably, the xenon arc lamp 11 uses a daylight-type filter, and the bulb transmittance of the xenon arc lamp 11 is ≥92%. The spectrum emitted by the xenon arc lamp 11 includes ultraviolet, visible, and infrared light. However, the unfiltered spectrum may be distorted or too strong in the short-wave ultraviolet region, failing to realistically simulate natural sunlight on the Earth's surface. The daylight-type filter can filter out unnecessary short-wave ultraviolet light (such as the portion with wavelengths below 295nm), adjusting the spectral energy distribution to more closely resemble the actual usage environment, thereby simulating the solar spectrum under different conditions and ensuring the accuracy and relevance of the test results.

[0022] Preferably, a plurality of stainless steel nozzles are installed on the spray pipe 12.

[0023] Preferably, the test rack 13 is inclined at 30° relative to the bottom surface of the test chamber 1, and has four layers.

[0024] Preferably, the angle steel 132 has two layers, one layer is connected to the middle of the grid 131, and the other layer is connected to the bottom of the grid 131. Multiple drainage holes 133 are provided on one side of the angle steel 132 along the length of the angle steel 132. During simulated rainfall, the test water can be discharged to the bottom of the test chamber through the drainage holes 133 and then discharged through the drain outlet 17.

[0025] Preferably, the water tank 2 has a water tank inlet 22 on the top and a water tank drain outlet 23 on the bottom side wall.

[0026] Preferably, the outer wall of the control box 4 is provided with a display panel 41 and a plurality of control switches 42, the control switches 42 including a xenon arc lamp switch, a spray switch, a blower switch and a temperature adjustment switch.

[0027] The inner wall of the test chamber 1, the grid 131, the angle steel 132, the sand-filling tray 14 and the water tank 2 are all made of stainless steel, and the water tank 2 can also be made of plastic.

[0028] To adapt to the test conditions of solar absorption coatings at no less than 650℃, and to the working conditions of different corrosive media in simulated rainwater tests, the stainless steel described in this invention is a nickel-based high-temperature alloy (nickel-based alloys refer to a class of alloys with high strength and certain resistance to oxidation and corrosion at high temperatures of 650 to 1000℃) or a cobalt-based high-temperature alloy (an austenitic high-temperature alloy containing 40 to 65% cobalt, which has certain high-temperature strength, good resistance to hot corrosion and oxidation at 730 to 1100℃).

[0029] A method for testing the service performance of a solar absorber coating for tower-type concentrated solar power generation, using the aforementioned testing device for the service performance of a solar absorber coating for tower-type concentrated solar power generation, specifically includes the following steps: S1. Test plate preparation: S11. Raw material preparation: Use materials and sizes that are appropriate and in sufficient quantity; for example, use stainless steel plates with a minimum size of 30mm×30mm×2mm as test plates. S12. Degreasing: Wipe the surface of the test panel with a non-polar solvent to remove oil. After wiping, blow dry, oil-free compressed air onto the surface of the test panel to remove any fabric fibers shed from the wiping cloth during the degreasing process. After blowing, use a strong flashlight to shine a horizontal light obliquely on the surface of the test panel to check and ensure that there are no fabric fibers or other dirt residues on the surface of the test panel. The non-polar solvent is, for example, xylene. S13. Surface treatment: The surface of the test plate is sandblasted to achieve a surface roughness of Rz10~25μm; the abrasive used in the sandblasting is quartz sand with a mesh size of 80~100 mesh. S14. Spray coating test panel: The solar energy absorbing coating is sprayed onto the surface of the test panel using air spraying, and then the coating is cured at high temperature according to the coating technical data instructions. S15. Avoid direct sunlight and allow the test plate to stand for at least 24 hours in a room temperature environment that avoids direct sunlight before conducting a service performance test of the solar absorption coating. S2. Preparation of test sand and water: S21. Sand preparation: Based on the location of the test object, take sand samples from the corresponding area, dry the sand, filter it, and set it aside for later use; the sand should be dried at 100℃ for 2 hours; the sand should be sieved using a 60-mesh sieve, and the sand with a mesh size of 60 or larger should be reserved for later use. S22. Test water preparation: Based on the composition and pH value of rainwater in the area where the test object is located, test water is prepared using a buffer solution or rainwater is directly collected from the corresponding area for later use or tap water is used. S3. Service performance test: S31. Place sand in sand tray 14, with a quantity of ≥20g, and pour test water into water tank 2; S32. Divide the test plate into two parts, one part being the test plate and the other part being the control plate. Place the test plate on the test rack 13. S33. According to the test requirements, the xenon arc lamp 11, submersible pump 21, blower 3 and heating module 15 are controlled by the control box 4 to simulate sunlight exposure, rain erosion, wind and sand erosion and adjust the ambient temperature to carry out coating service performance tests. For example: Step 1: Turn on the heating module 15 through the control box 4 to raise the temperature inside the test chamber 1 to 650℃, with a heating rate ≤10℃ / min; After the temperature rises to 650℃, turn on the blower 2 switch to blow away the sand and soil, and at the same time turn on the xenon arc lamp 11 switch to keep warm for 6-12 hours. The heat preservation time can be set according to the sunshine hours of different regions and seasons. Step 2: If you need to simulate rainy weather, start the submersible pump 21 through the spray switch. The test water can then be sprayed onto the surface of the test plate through multiple stainless steel nozzles installed on the spray pipe 12. After the specified time is reached, turn off the spray switch. Step 3: After the heat preservation is completed, turn off the heating module 15 and the xenon arc lamp 11. After the test chamber 1 cools down to room temperature, turn off the blower 3 switch. Repeat the above three steps to carry out the cyclic test. The number of tests can be determined according to actual needs.

[0030] S34. After the coating service performance test is completed, remove the test plate, collect the sand in the sand tray 14, and open the drain 17 to drain the test water in the test chamber 1. S35. According to relevant testing standards, test the adhesion and absorption rate of the comparison panel; test the adhesion, paint film aging and absorption rate of the test panel, compare the changes in adhesion and absorption rate of the comparison panel and the test panel, and determine the service performance of the coating of the test panel under the specified time by combining the degree of paint film aging.

[0031] The adhesion is evaluated by cross-cutting tests according to relevant industry standards to assess the adhesion level of the coating. The aging of the paint film is assessed according to relevant industry standards, including evaluation of the coating's blistering, rusting, cracking, peeling, and chalking levels. The absorption rate was measured on the test panel according to relevant industry standards.

[0032] Taking a tower-type solar thermal power project in Guazhou County, Gansu Province, operating under receiver conditions for six months as an example: S1. Test plate preparation: S11. Raw material preparation: The test plates are made of N06690 (commonly known as 690 alloy, which is a nickel-based high-temperature alloy with nickel as the base and rich in chromium), with a size of 50×50×2mm, and a total of 6 pieces; S12. Degreasing: Use xylene to wipe and remove oil. After wiping, use dry, oil-free compressed air to blow the surface of the test panel to remove the cloth fibers that fall off during the degreasing process. After blowing, use a strong flashlight to shine a horizontal light obliquely on the surface of the test panel to check and ensure that there are no cloth fibers or other dirt residues on the surface of the test panel. S13. Surface treatment: The surface of the test plate is sandblasted with quartz sand of 80 mesh. The surface roughness of the test plate after sandblasting should reach Rz10~25μm. S14. Spray-coated test panel: The solar energy absorbing coating is sprayed onto the surface of the test panel using air spraying and then cured at high temperature according to the coating technical data instructions. S15. Avoid direct sunlight and allow the test plate to stand for at least 24 hours in a room temperature environment that avoids direct sunlight before conducting a service performance test of the solar absorption coating. S2. Preparation of test sand and water: S21. Sand preparation: Take sand from the Gobi Desert area of ​​Guazhou County for testing. The sand should be dried at 100℃ for 2 hours. After drying, the sand should be sieved using a 60-mesh sieve, and the sand with a mesh size of 60 or larger should be kept for later use. S22. Test water preparation: Tap water shall be used as the test water; S3. Service performance test: S31. Place 25g of sand in the sand tray 14 and pour tap water into the water tank 2. S32. Divide the test plate into two parts: 3 test plates and 3 control plates. Place the test plates on the test rack 13. S33. Step 1: Turn on the heating module 15 through the control box 4 to raise the temperature inside the test chamber 1 to 650℃ at a heating rate of 5℃ / min. After the temperature reaches 650℃, turn on the blower 2 to blow away the sand and simultaneously turn on the xenon arc lamp 11 and keep it warm for 8 hours. Step 2: After 2 hours of heat preservation, start the submersible pump 21 through the spray switch. The test water can then be sprayed onto the surface of the test plate through multiple stainless steel nozzles installed on the spray pipe 12. After the specified time is reached, turn off the spray switch. Step 3: After the heat preservation is completed, turn off the heating module 15 and the xenon arc lamp 11. After the test chamber 1 cools down to room temperature, turn off the blower 3 switch. Repeat the above three steps to carry out the cyclic test. The number of test cycles is 180.

[0033] S34. After the coating service performance test is completed, remove the test plate, collect the sand in the sand tray 14, and open the drain 17 to drain the test water in the test chamber 1. S35. Test the adhesion and absorption rate of the comparison panel; test the adhesion, paint film aging and absorption rate of the test panel, compare the changes in adhesion and absorption rate between the comparison panel and the test panel, and determine the service performance of the coating of the test panel under the specified time in combination with the degree of paint film aging.

[0034] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A testing device for the service performance of a tower-type solar thermal power generation solar absorption coating, characterized in that, It includes a test chamber (1), a water tank (2), a blower (3) and a control box (4), wherein the water tank (2), the blower (3) and the control box (4) are all connected to the test chamber (1); The test chamber (1) is equipped with a xenon arc lamp (11) at the top, a multi-layer test rack (13) in the middle, and a heating module (15) at the bottom. A spray pipe (12) is provided between the xenon arc lamp (11) and the test rack (13). Both the spray pipe (12) and the test rack (13) are connected to the inner wall of the test chamber (1). The test rack (13) is inclined relative to the bottom surface of the test chamber (1). The test rack (13) is composed of longitudinally arranged grids (131) and transversely arranged angle steels (132). A sand tray (14) is placed on the heating module (15). An air outlet is provided on the bottom side wall of the test chamber. The inlet side of the air outlet is connected to the blower (3), and a stainless steel baffle (16) is hinged to the outlet side. A drain outlet (17) is provided at the bottom of the test chamber. The water tank (2) is equipped with a submersible pump (21) at the bottom, and the submersible pump (21) is connected to the spray pipe (12); The xenon arc lamp (11), submersible pump (21), blower (3) and heating module (15) are electrically connected to the control box (4).

2. The test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to claim 1, characterized in that, The xenon arc lamp (11) uses a daylight filter, and the bulb transmittance of the xenon arc lamp (11) is ≥92%.

3. The tower-type solar thermal power generation solar absorption coating service performance testing device according to claim 1, characterized in that, Multiple stainless steel nozzles are installed on the spray pipe (12).

4. The test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to claim 1, characterized in that, The test rack (13) is inclined at 30° relative to the bottom surface of the test chamber (1), and has four layers.

5. The test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to claim 1, characterized in that, The angle steel (132) has two layers. One layer is connected to the middle of the grid (131), and the other layer is connected to the bottom of the grid (131). Multiple drainage holes (133) are provided on one side of the angle steel (132) along the length of the angle steel (132).

6. The test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to claim 1, characterized in that, The water tank (2) has a water tank inlet (22) at the top and a water tank drain outlet (23) on the bottom side wall.

7. The test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to claim 1, characterized in that, The outer wall of the control box (4) is provided with a display panel (41) and multiple control switches (42).

8. The test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to claim 1, characterized in that, The inner wall of the test chamber (1), the grid (131), the angle steel (132), the sand tray (14) and the water tank (2) are all made of stainless steel.

9. A test device for the service performance of a tower-type solar thermal power generation solar absorption coating according to any one of claims 1-8, characterized in that, The stainless steel is a nickel-based alloy or a cobalt-based alloy.

10. A method for testing the service performance of solar absorber coatings in tower-type concentrated solar power generation systems, characterized in that, The service performance testing device for a tower-type solar thermal power generation solar absorption coating as described in any one of claims 1-8 specifically includes the following steps: S1. Test plate preparation: S11. Raw material preparation: Select test plates of suitable material and size, and in sufficient quantity; S12. Degreasing: Use a non-polar solvent to wipe the surface of the test panel to remove oil. After wiping, use dry, oil-free compressed air to blow the surface of the test panel to remove the cloth fibers that fall off during the degreasing process. After blowing, use a strong flashlight to shine a horizontal light obliquely on the surface of the test panel to check and ensure that there are no cloth fibers or other dirt residues on the surface of the test panel. S13. Surface treatment: The surface of the test plate shall be sandblasted to achieve a surface roughness of Rz10~25μm; S14. Spray-coated test panel: The solar energy absorbing coating is sprayed onto the surface of the test panel using an air spraying method, and then the coating is cured by heating. S15. Avoid direct sunlight and allow the test plate to stand for at least 24 hours. S2. Preparation of test sand and water: S21. Sand preparation: Based on the location of the test object, take sand samples from the corresponding area, dry the sand, filter it, and set it aside for later use. S22. Test water preparation: Based on the composition and pH value of rainwater in the area where the test object is located, test water is prepared using a buffer solution or rainwater is directly collected from the corresponding area for later use. S3. Service performance test: S31. Place sand in the sand tray (14) and pour test water into the water tank (2); S32. Divide the test plate into two parts, one part being the test plate and the other part being the control plate. Place the test plate on the test rack (13). S33. According to the test requirements, the xenon arc lamp (11), submersible pump (21), blower (3) and heating module (15) are controlled by the control box (4) to simulate sunlight, rain, wind and sand erosion and adjust the ambient temperature to carry out coating service performance test. S34. After the test, remove the test plate and collect the sand in the sand tray (14). Open the drain (17) to drain the test water in the test chamber (1). S35. Test the adhesion and absorption rate of the comparison panel; test the adhesion, paint film aging and absorption rate of the test panel, compare the changes in adhesion and absorption rate between the comparison panel and the test panel, and determine the service performance of the coating of the test panel under the specified time in combination with the degree of paint film aging.

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