An experimental platform for testing the fire behavior of photovoltaic modules

Abstract

The application discloses an experimental platform for testing the combustion behavior of a photovoltaic module, and mainly comprises a photovoltaic fire simulation system, a smoke collecting system, a spraying system, an ignition module and a monitoring system. The photovoltaic fire simulation system mainly comprises a fixed component, building materials, an adjustable support, an electric telescopic module and a photovoltaic sample, which are used for accurately simulating the scene of a building photovoltaic system. The smoke collecting system is used for increasing the smoke flow path and filtering the smoke. The spraying system is used for filtering and purifying the wastewater after water spraying of the smoke dust. The ignition module is used for simulating ignition sources with different widths and powers, and igniting the photovoltaic sample. The monitoring system is used for monitoring the temperature distribution, internal flow field distribution and mass loss of the photovoltaic sample, the total mass of the filtered smoke dust, the temperature signal of the building materials and the radiation heat flow distribution, so as to clearly understand the combustion and spread of different types of building photovoltaic fires, and provide ideas and references for the fireproof design of building photovoltaic fires.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic module testing, in particular to an experimental platform for testing the combustion behavior of photovoltaic modules. BACKGROUND

[0002] Building integrated photovoltaics is a technology that integrates photovoltaic products into buildings, which can effectively reduce the use of fossil energy and accelerate the process of urban carbon neutralization, and has been widely concerned and applied by countries around the world. However, the arrangement of photovoltaic systems can significantly increase the fire load of the building itself, which is prone to cause serious building fire accidents.

[0003] When the photovoltaic system has a short circuit fault or the "hot spot" effect occurs, the photovoltaic module will spontaneously combust and cause fire spread, and the fire will also ignite the building exterior insulation material or the waterproof layer on the building roof, which is prone to cause the expansion of the fire. In addition, in order to improve the heat dissipation efficiency of the photovoltaic system, there is a gap between the photovoltaic system and the outside of the building. The gap will have a significant impact on the "chimney" effect, thereby affecting the flame spread rate and smoke entrainment, and causing more serious building fire accidents.

[0004] For the field of photovoltaic fire safety technology, there is currently a variable-angle solar panel heating test system and method (application publication number CN 119086642 A), which can test multiple types of photovoltaic modules at different angles and analyze the fire performance of photovoltaic modules under the influence of different radiant heat sources. However, this patent does not consider the interaction between the building and the photovoltaic module, and cannot simulate the actual photovoltaic curtain wall or roof photovoltaic fire scene, and the main function is to test the heat resistance of photovoltaic modules. Therefore, a test system that can simulate building photovoltaic integration fires has been developed, which can observe and analyze the photovoltaic system fire development law under the coupling of multiple factors, and determine the fire risk of different types of photovoltaic modules, providing technical support for building photovoltaic safety research. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes an experimental platform for testing the combustion behavior of photovoltaic modules, which can more accurately simulate the photovoltaic system fire at different positions of building photovoltaic integration, determine the interaction between the building material and the photovoltaic module after the photovoltaic system or the building material catches fire, and the influence of the "chimney" effect on the combustion spread of photovoltaic fires, providing an experimental platform and data support for building photovoltaic system fire prevention design.

[0006] The experimental platform for testing the combustion behavior of a photovoltaic module comprises: a photovoltaic fire simulation system, which is used for accurately simulating a building photovoltaic system scene; a smoke collection system, which is used for increasing a smoke flow path and filtering smoke; a spraying system, which is used for filtering and purifying wastewater after water spraying of smoke dust; an ignition module, which is used for simulating an ignition source with different widths and fire source powers, igniting the photovoltaic sample; a monitoring system, which is used for monitoring temperature distribution, internal flow field distribution and mass loss of the photovoltaic sample, total mass of filtered smoke dust, and temperature signal and radiant heat flow distribution of the building material; and a collection module, which is used for collecting real-time data collected by the monitoring system.

[0007] According to the experimental platform for testing the combustion behavior of a photovoltaic module, the photovoltaic fire simulation system mainly comprises a fixed component, building materials, an adjustable support, an electric telescopic module and a photovoltaic sample; the fixed component is made of a hard high-temperature-resistant material, and is composed of a long plate and two short plates, one end of each of the two short plates is perpendicularly connected to the two ends of the long plate to form a "Z" shape structure; the adjustable support comprises a universal coupling and a telescopic support, the telescopic support is arranged on the upper and lower ends of the fixed component through the universal coupling, and the height of the telescopic support and the included angle between the telescopic support and the fixed component are adjusted to simulate photovoltaic fire under different inclination angles; the building materials are arranged on the fixed component, and the surface area is consistent with the long plate of the fixed component; the electric telescopic module is arranged on the left and right sides of the fixed component, two electric telescopic modules are uniformly arranged on one side, which is used for adjusting the distance between the photovoltaic sample module and the building materials, and a photovoltaic module fixing clamp is arranged at the end of the electric telescopic module to ensure stable fixation of the photovoltaic sample.

[0008] Optionally, the photovoltaic sample can be a flexible photovoltaic module or a hard photovoltaic module, or a combustible material with similar thickness, which is used for simulating the combustion and spread behavior of other combustible materials.

[0009] Optionally, the building materials can be roof tiles, color steel plates or waterproof coiled materials, or can be brick-concrete materials, wood structures, concrete and other materials of building facades.

[0010] According to the experimental platform for testing the combustion behavior of a photovoltaic module disclosed in the application, the smoke collecting system mainly comprises a smoke collecting cover, a filtering module and an adjustable support assembly; the smoke collecting cover is a rectangular structure with open upper and lower ends, the smoke inlet end of the smoke collecting cover is arranged towards the gap between the photovoltaic sample and the building material, and the smoke outlet end of the smoke collecting cover is fixedly connected with the filtering module; the filtering module is also open at both ends, and the opening size is consistent with the size of the smoke outlet end of the smoke collecting cover; two smoke baffles and a filter screen are arranged in the filtering module; the two smoke baffles are arranged on the two sides of the filtering module respectively, and the two smoke baffles are arranged in an inclined and staggered manner with consistent inclination angles; a gap is formed between the two smoke baffles for prolonging the spreading path of the smoke and collecting the sewage; the filter screen can completely cover the opening of the filtering module and is arranged above the smoke baffles for filtering the smoke dust impurities; the adjustable support assembly is connected with the filtering module through a bearing, so that the smoke inlet end of the smoke collecting cover is always perpendicular downward, and the height of the adjustable support assembly is adjustable, so that the smoke inlet end of the smoke collecting cover is always higher than the photovoltaic fire simulation system.

[0011] According to the experimental platform for testing the combustion behavior of a photovoltaic module disclosed in the application, the spraying system mainly comprises the water spray nozzle, the water collecting port, a water pipe, a water purification module, a water tank, a water pump and a power supply; the water spray nozzle, the water collecting port, the water purification module, the water tank and the water pump are sequentially connected through the water pipe, and the power supply supplies power to the water pump; the water spray nozzle, the water collecting port, the water purification module, the water tank and the water pump in the spraying system are sequentially connected through the water pipe, and the power supply supplies power to the water pump; the water spray nozzle is arranged above the filter screen, and the water spraying direction and the inclination angle of the water spray nozzle are consistent, so as to spray water to extinguish the smoke; the water collecting port is arranged on the side of the lower smoke baffle and is slightly higher than the included angle between the lower smoke baffle and the filtering module, so as to collect the sewage after the smoke is extinguished; the water purification module is internally provided with a filter core for filtering the sewage and collecting the smoke dust particles; the water tank is used for containing the filtered purified water; and the water pump is used for providing water circulation power.

[0012] Advantageously, the spraying range of the water spray nozzle covers the entire cross section of the filtering module, so as to ensure that no smoke dust spills out of the upper opening of the smoke collecting cover.

[0013] According to the experimental platform for testing the combustion behavior of a photovoltaic module disclosed in the application, the ignition module comprises an igniter and a telescopic device, the igniter is arranged on the telescopic device, the power and width of the fire source are adjustable, and the igniter is used for igniting the photovoltaic sample; and the telescopic device is used for controlling the movement of the igniter and adjusting the ignition position.

[0014] Advantageously, the igniter is placed on a telescopic device, which is controlled by the telescopic device to move into the interior of the side wall simulation device before ignition to ignite the combustible gas, and to move out of the interior of the side wall simulation device after the ignition is completed to avoid affecting the monitoring of the flame behavior during combustion.

[0015] According to the experimental platform for testing the combustion behavior of a photovoltaic module disclosed by the application, the monitoring system comprises a temperature monitoring module, an airflow pressure module, an internal radiation monitoring module, a ground scale and a mass measurement module; the temperature monitoring module comprises a plurality of photovoltaic module temperature measuring thermocouples and building material temperature measuring thermocouples, the photovoltaic module temperature measuring thermocouples are uniformly arranged on the inner side surface of the photovoltaic sample and are used for measuring the surface temperature distribution of the photovoltaic sample; the building material temperature measuring thermocouples are uniformly arranged on the surface of the building material and in the building interior and are used for measuring the temperature at different positions of the building material; the airflow pressure module is longitudinally uniformly arranged in the building material interior, the probe of the airflow pressure module is arranged on the center line of the gap between the photovoltaic sample and the building material, and is used for recording the air pressure at different positions of the gap; the internal radiation monitoring module comprises a plurality of internal radiation heat flow meters, the internal radiation heat flow meters are longitudinally arranged in the building material, the probe of the internal radiation heat flow meter is flush with the surface of the building material, and is used for measuring the size of the received radiation heat flow of the building material at different positions; the ground scale is arranged below the photovoltaic fire simulation system and is used for measuring the mass loss of the photovoltaic sample in real time; and the mass measurement module is arranged below the water purification module and is used for measuring the mass change of the water purification module, and then measuring the mass of the filtered smoke dust.

[0016] Advantageously, a high-transmittance high-temperature-resistant glass cover is arranged on the internal radiation monitoring module to prevent the probe of the internal radiation monitoring module from being directly burned by the flame and high-temperature flue gas.

[0017] According to the experimental platform for testing the combustion behavior of a photovoltaic module disclosed by the application, the acquisition module is used for collecting the real-time data collected by the monitoring system.

[0018] Additional aspects and advantages of the application will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0020] Figure 1 FIG. 1 is a schematic diagram of the overall structure of an experimental platform for testing the combustion behavior of a photovoltaic module according to an embodiment of the application.

[0021] Figure 2A structure diagram of an adjustable support in an experimental platform for testing the combustion behavior of a photovoltaic module according to an embodiment of the present application.

[0022] Figure 3 A structure diagram of a smoke collection system and a spraying system in an experimental platform for testing the combustion behavior of a photovoltaic module according to an embodiment of the present application.

[0023] In the present application, all the drawings are schematic drawings, which are only used for explaining the principles of the present application, and are not drawn according to the actual proportions.

[0024] Explanation of reference signs:

[0025] an experimental platform 1000 for testing the combustion behavior of a photovoltaic module,

[0026] a photovoltaic fire simulation system 100, a fixed module 110, a building material 120, an adjustable support 130, a universal coupling 131, a telescopic support 132, an electric telescopic module 140, a photovoltaic module fixing clamp 141, a photovoltaic sample 150,

[0027] a smoke collection system 200, a smoke collection cover 210, a filter module 220, a smoke baffle 221, a filter screen 222, an adjustable support module 230,

[0028] a spraying system 300, a water spray nozzle 310, a water collection port 320, a water pipe 330, a water purification module 340, a filter element 341, a water tank 350, a water pump 360, a power supply 370,

[0029] an ignition module 400, an igniter 410, a telescopic device 420,

[0030] a monitoring system 500, a temperature monitoring module 510, a photovoltaic module temperature measuring thermocouple 511, a building material temperature measuring thermocouple 512, an air flow pressure module 520, an internal radiation monitoring module 530, a ground scale 540, a mass measuring module 550,

[0031] a collection module 600. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only used for explaining the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] An experimental platform 1000 for testing the combustion behavior of a photovoltaic module is described below with reference to the accompanying drawings of the specification.

[0035] An experimental platform 1000 for testing the combustion behavior of a photovoltaic module according to an embodiment of the present application, as shown in Figure 1 , includes a photovoltaic fire simulation system 100, a smoke collection system 200, a sprinkler system 300, an ignition module 400, a monitoring system 500, a temperature monitoring module 510, and a collection module 600.

[0036] As shown in Figure 1 and Figure 2 , the photovoltaic fire simulation system 100 mainly includes a fixed component 110, a building material 120, an adjustable support 130, an electric telescopic module 140, and a photovoltaic sample 150. The fixed component 110 is made of a hard and high-temperature-resistant material, consisting of a long plate and two short plates. One end of each of the two short plates is connected perpendicularly to the two ends of the long plate, forming a "Z" shape structure. The adjustable support 130 includes a universal coupling 131 and a telescopic support 132. The telescopic support 132 is arranged at the upper and lower ends of the fixed component 110 through the universal coupling 131. By adjusting the height of the telescopic support 132 and the angle between the telescopic support 132 and the fixed component 110, the photovoltaic fire under different inclination angles can be simulated. The building material 120 is arranged on the fixed component 110, and its surface area is consistent with that of the long plate of the fixed component 110. The electric telescopic module 140 is arranged on the left and right sides of the fixed component 110. Two electric telescopic modules 140 are evenly arranged on one side, which are used to adjust the distance between the photovoltaic sample 150 module and the building material 120. The electric telescopic module 140 is provided with a photovoltaic module fixing clamp 141 at the end to ensure stable fixation of the photovoltaic sample 150.

[0037] Optionally, the height of the telescopic support 132 in the adjustable support 130 is adjusted so that the fixed component 110 is vertical, simulating the building facade.

[0038] Optionally, the photovoltaic sample 150 can be a flexible photovoltaic module, simulating the combustible material of the building photovoltaic integration.

[0039] Optionally, the building material 120 is a concrete material, simulating the building facade material.

[0040] Combination Figure 1 and Figure 3 As shown, the smoke collection system 200 mainly includes a smoke collection hood 210, a filter module 220, and an adjustable support assembly 230. The smoke collection hood 210 is open at both ends, with the smoke inlet facing the gap between the photovoltaic sample 150 and the building material 120. The smoke outlet of the smoke collection hood 210 is fixedly connected to the filter module 220. The filter module 220 is open at both ends, with the size of the openings matching the size of the smoke outlet of the smoke collection hood 210. The filter module 220 has two smoke baffles 221 and a filter screen 222 inside. The two smoke baffles 221 are respectively arranged on the filter module. On both sides of 220, two smoke baffles 221 are arranged at an angle and are staggered, with the same angle of inclination. There is a gap between the two smoke baffles 221 to extend the path of smoke spread and collect sewage. The filter screen 222 completely covers the open section of the filter module 220 for secondary filtration of smoke and dust impurities. The adjustable support component 230 is connected to the filter module 220 through a bearing, so that the smoke inlet end of the smoke hood 210 is always vertically downward. The height of the adjustable support component 230 is adjustable, so that the smoke inlet end of the smoke hood 210 is always higher than the photovoltaic fire simulation system 100.

[0041] Continue to refer to Figure 3 As shown, the spray system 300 mainly includes a water spray nozzle 310, a water inlet 320, a water pipe 330, a water purification module 340, a water tank 350, a water pump 360, and a power supply 370. The water spray nozzle 310, water inlet 320, water purification module 340, water tank 350, and water pump 360 are connected sequentially through the water pipe 330, and the power supply 370 supplies power to the water pump 360. The water spray nozzle 310 is arranged above the filter screen 222, and the water spray direction of the water spray nozzle 310 is consistent with the tilt angle, used for spraying water to eliminate smoke. The water inlet 320 is arranged on one side of the lower smoke baffle 221, slightly higher than the angle between the lower smoke baffle 221 and the filter module 220, used to collect the wastewater after smoke elimination. The water purification module 340 contains a filter element 341, used to filter wastewater and collect smoke particles. The water tank 350 is used to hold the filtered purified water. The water pump 360 is used to supply the power for water circulation.

[0042] Advantageously, the spray range of the water spray nozzle 310 covers the entire fume hood 210, ensuring that no smoke or dust overflows from the upper opening of the fume hood 210.

[0043] Reference Figure 1 As shown, the ignition module 400 includes an igniter 410 and a telescopic device 420. The igniter 410 is located on the telescopic device 420 and the ignition power and ignition width are adjustable for igniting the photovoltaic sample 150. The telescopic device 420 is used to control the movement of the igniter 410 and adjust the ignition position.

[0044] Advantageously, the igniter 410 is placed on the telescopic device 420, which is controlled to move into the interior of the sidewall simulation device before ignition to ignite the combustible gas, and to move out of the interior of the sidewall simulation device after the completion of ignition to avoid affecting the monitoring of the flame behavior during the combustion process.

[0045] With continued reference to Figure 1 As shown, the monitoring system 500 comprises a temperature monitoring module 510, an airflow pressure module 520, an internal radiation monitoring module 530, a ground scale 540, and a mass measurement module 550; the temperature monitoring module 510 comprises a plurality of photovoltaic component temperature measuring thermocouples 511 and building material temperature measuring thermocouples 512, the photovoltaic component temperature measuring thermocouples 511 are uniformly arranged on the inner surface of the photovoltaic sample 150 for measuring the temperature distribution of the surface of the photovoltaic sample 150; the building material temperature measuring thermocouples 512 are uniformly arranged on the surface of the building material 120 and inside the building for measuring the temperature at different positions of the building material 120; the airflow pressure module 520 is uniformly arranged inside the building material 120 along the longitudinal direction, the probe of the airflow pressure module 520 is arranged at the center line of the gap between the photovoltaic sample 150 and the building material 120 for recording the air pressure at different positions of the gap; the internal radiation monitoring module 530 comprises a plurality of internal radiation heat flow meters, the internal radiation heat flow meters are arranged inside the building material 120 along the longitudinal direction, the probes of the internal radiation heat flow meters are flush with the surface of the building material 120 for measuring the amount of radiation heat received by the building material 120 at different positions; the ground scale 540 is arranged below the photovoltaic fire simulation system 100 for measuring the mass loss of the photovoltaic sample 150 in real time; the mass measurement module 550 is arranged below the water purification module 340 for measuring the mass change of the water purification module 340, and further measuring the mass of the filtered smoke dust.

[0046] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is more than three.

[0047] Optionally, the internal radiation monitoring module 530 is a water-cooled radiation heat flow meter, which facilitates the acquisition of radiation heat flow data.

[0048] Advantageously, a high-transparency high-temperature-resistant glass cover is arranged on the internal radiation monitoring module 530 to prevent the probes of the internal radiation monitoring module 530 from being directly burned by the flame and high-temperature flue gas.

[0049] As Figure 1 shown, the acquisition module 600 is connected to each module of the monitoring system 500 for collecting real-time data collected by the monitoring system 500.

[0050] Advantageously, the acquisition module 600 can be a computer, which can collect and analyze the collected data, improve the automation of data processing, and help analyze the state information of the flame.

[0051] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, or can be electrical connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] Figure 1 The 18 temperature monitoring devices 510, 3 air flow pressure modules 520 and 3 internal radiation monitoring modules 530 are shown for illustrative purposes, but a person of ordinary skill in the art, after reading the above technical solutions, can obviously understand that the application of the solutions to other numbers of temperature monitoring devices 510, air flow pressure modules 520 and internal radiation monitoring modules 530 is also within the scope of the present application.

[0053] The installation and use of monitoring devices such as "chimney" effect generation principle, thermocouple and heat flow meter in the experimental platform 1000 for testing the combustion behavior of photovoltaic modules according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0054] In the description of the present application, the description of the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An experimental platform for testing the fire behavior of photovoltaic modules, characterized in that, The application relates to a photovoltaic fire simulation system. The photovoltaic fire simulation system mainly comprises a fixed assembly, building materials, an adjustable support, an electric telescopic module and a photovoltaic sample, is used for simulating photovoltaic system arrangement schemes under different types of building outer wall scenes, a smoke collection system mainly comprises a smoke collection cover, a filtering module and an adjustable support assembly, is used for prolonging a smoke spreading path and filtering and removing smoke particles, a spraying system mainly comprises water spray nozzles, a water collecting port, a water pipe, a water purification module, a water tank, a water pump and a power supply, is used for spraying water to absorb smoke particles, an ignition module comprises an igniter and a telescopic device, the igniter is located on the telescopic device, the fire source power and the fire source width are adjustable, and the photovoltaic sample is ignited, the telescopic device is used for controlling the igniter to move and adjusting an ignition position, a monitoring system comprises a temperature monitoring module, an airflow pressure module, an internal radiation monitoring module, a ground scale and a mass measurement module, is used for monitoring temperature distribution of the photovoltaic sample, internal flow field distribution and mass loss, total mass of filtered smoke dust and temperature signals and radiation heat flow distribution of the building materials in real time, and a collection module is used for collecting real-time data collected by the monitoring system. The fixed assembly is made of a long plate and two short plates, one end of the two short plates is respectively connected with the two ends of the long plate perpendicularly and fixedly, and a "Z" shaped structure is formed; the building materials are arranged on the fixed assembly, and the surface area is consistent with the long plate of the fixed assembly; the adjustable support comprises a universal coupling and a telescopic support, is used for changing the inclination angle of the fixed assembly, and then simulates photovoltaic fire of building facades or different inclination angle roofs; the telescopic support in the adjustable support is arranged on the upper and lower ends of the fixed assembly through the universal coupling, the height of the telescopic support and the included angle between the telescopic support and the fixed assembly are adjusted, and photovoltaic fire under different inclination angles is simulated; The electric telescopic module is used for adjusting the distance between the photovoltaic sample module and the building materials; the electric telescopic module is arranged on the left and right sides of the fixed assembly, two electric telescopic modules are uniformly arranged on one side, and photovoltaic assembly fixing clamps are arranged at the ends of the electric telescopic modules, so that the photovoltaic sample is stably fixed; The smoke collection cover is a rectangular structure with open upper and lower ends, the smoke inlet end faces the gap between the photovoltaic sample and the building materials, and the smoke outlet end of the smoke collection cover is fixedly connected with the filtering module; the filtering module is open at both ends, the opening size is consistent with the size of the smoke outlet end of the smoke collection cover, and two smoke baffle plates and a filter screen are arranged in the filtering module; the two smoke baffle plates are arranged on the two sides of the filtering module, the two smoke baffle plates are arranged in an inclined and staggered mode, the inclined angles are consistent, a gap is left between the two smoke baffle plates, and the gap is used for prolonging the smoke spreading path and converging sewage; the filter screen can completely cover the opening of the filtering module, is arranged above the smoke baffle plates, and is used for filtering smoke dust impurities again. The adjustable support assembly is connected with the filter module through a bearing, so that the smoke inlet end of the smoke hood is always vertically downward, and the adjustable support assembly is adjustable in height, so that the smoke inlet end of the smoke hood is always higher than the photovoltaic fire simulation system. The water spray nozzle, the water collecting port, the water purification module, the water tank and the water pump in the spraying system are connected in sequence through the water pipe, and the power supply supplies power to the water pump; the water spray nozzle is arranged above the filter screen, and the water spraying direction is consistent with the inclination angle, which is used for spraying water to smoke; the water collecting port is arranged on the side of the lower smoke baffle, and is slightly higher than the included angle between the lower smoke baffle and the filter module, which is used for collecting sewage after smoke elimination; the water purification module is internally provided with a filter core, which is used for filtering sewage and collecting smoke dust particles; The ground scale is arranged below the photovoltaic fire simulation system, and is used for measuring the mass loss of the photovoltaic sample in real time; the mass measurement module is arranged below the water purification module, and is used for measuring the mass change of the water purification module, so as to measure the mass of filtered smoke dust.

2. The experimental platform for testing the fire behavior of photovoltaic modules according to claim 1, characterized in that, The temperature monitoring module includes a plurality of photovoltaic component temperature measuring thermocouples and building material temperature measuring thermocouples, the photovoltaic component temperature measuring thermocouples are uniformly arranged on the inner side surface of the photovoltaic sample, and are used for measuring the surface temperature distribution of the photovoltaic sample; the building material temperature measuring thermocouples are uniformly arranged on the surface and inside of the building material, and are used for measuring the temperature at different positions of the building material.

3. The test platform for testing the fire behavior of a photovoltaic module according to claim 1, wherein, The air flow pressure module is longitudinally and uniformly arranged in the building material, and the probe of the air flow pressure module is arranged at the center line of the gap between the photovoltaic sample and the building material, and is used for recording the air pressure at different positions of the gap.

4. The test platform for testing the fire behavior of photovoltaic modules according to claim 1, characterized in that, The internal radiation monitoring module includes a plurality of internal radiation heat flow meters, the internal radiation heat flow meters are longitudinally arranged in the building material, the probes of the internal radiation heat flow meters are flush with the surface of the building material, and are used for measuring the size of the received radiation heat flow of the building material at different positions; the internal radiation monitoring module is covered with a high-transparency high-temperature-resistant glass cover, so as to prevent the probes of the internal radiation monitoring module from being directly burned by the flame and high-temperature flue gas.

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