Multi-sensor detecting device for light-heat performance of light-transmitting roof and detecting method thereof

Abstract

The present application belongs to the technical field of building envelope light-thermal performance detection, and specifically relates to a light-transmitting roof light-thermal performance multi-sensor detection device and a detection method thereof. The light-transmitting roof light-thermal performance multi-sensor detection device comprises a heat metering device, a supply-return air system, a supply-return water system, a control system, an external environment simulation device, an external environment box, an artificial light source, a light-transmitting roof test piece installed at the lower side wall of the external environment box, a spraying device comprising a nozzle, a first light source radiation intensity sensor, a second light source radiation intensity sensor and a first illuminance sensor arranged in the external environment box, wherein the first light source radiation intensity sensor is located below the artificial light source and above the nozzle, and the second light source radiation intensity sensor and the first illuminance sensor are located below the nozzle and above the light-transmitting roof test piece. The present application can accurately evaluate the light-thermal performance of the light-transmitting roof under the spraying condition.

Description

[0001] The present application is a divisional application of the invention patent application with the application number 2025101082666, the title of which is "Spray-type light-transmitting roof light-thermal performance detection device and its detection method", and which was filed on January 23, 2025. TECHNICAL FIELD

[0002] The present application belongs to the technical field of building envelope light-thermal performance detection, and specifically relates to a light-transmitting roof light-thermal performance multi-sensor detection device and its detection method. BACKGROUND

[0003] Light-transmitting roof is a building roof form mainly for natural lighting. Due to its advantages such as no obstruction, good visual effect, and light load, it is widely used in large public buildings such as airports and commercial complexes.

[0004] Although light-transmitting roof can effectively improve the indoor natural lighting environment and reduce the lighting energy consumption of the building, it has a significant negative impact on the indoor thermal environment due to its special thermal performance. In order to improve the indoor thermal environment and reduce the air conditioning energy consumption, spray-type light-transmitting roof with an auxiliary spray system has emerged, thereby achieving the "triple-win" goal of roof cooling, shading, and lighting. Although there are detection devices and methods for detecting the solar heat gain coefficient (SHGC) of light-transmitting envelope, the above-mentioned methods and devices are not suitable for the light-thermal performance evaluation of light-transmitting roof under spray conditions. SUMMARY

[0005] Therefore, the present application provides a light-transmitting roof light-thermal performance multi-sensor detection device, which comprises:

[0006] An external environment simulation device, comprising an external environment box, an artificial light source, and the artificial light source being installed in the external environment box;

[0007] A light-transmitting roof test piece, which is installed at the lower side wall of the external environment box and is located below the artificial light source;

[0008] A spray device, comprising a nozzle, the nozzle being located below the artificial light source and above the light-transmitting roof test piece, and the external environment box further comprising a first light source radiation intensity sensor, a second light source radiation intensity sensor, and a first illuminance sensor, wherein the first light source radiation intensity sensor is located below the artificial light source and above the nozzle, and the second light source radiation intensity sensor and the first illuminance sensor are located below the nozzle and above the light-transmitting roof test piece;

[0009] A heat metering device, comprising a heat metering box, a third light source radiation intensity sensor, and a second illuminance sensor, the heat metering box being located below the light-transmitting roof test piece;

[0010] a return air system for circulating air flow into the heat metering device, the return air system being in communication with the heat metering device;

[0011] a supply and return water system for supplying water for the return air system, the supply and return water system being in communication with the return air system;

[0012] a control system for controlling the external environment simulation device, the heat metering device, the return air system, the supply and return water system and the spray device, the control system being electrically connected with the external environment simulation device, the heat metering device, the return air system, the supply and return water system and the spray device.

[0013] In a second aspect, the present application provides a light-transmitting roof light-thermal performance multi-sensor detection method, which is detected by the light-transmitting roof light-thermal performance multi-sensor detection device of the first aspect, and the method comprises the following steps:

[0014] acquiring preset experimental requirements;

[0015] determining artificial light source control parameters according to the preset experimental requirements;

[0016] controlling the artificial light source to work according to the artificial light source control parameters;

[0017] controlling the supply and return water system to supply water to the return air system, controlling the return air system to circulate air into the heat metering device, and controlling the spray device to spray above the light-transmitting roof test piece;

[0018] acquiring the average radiation intensity of the outer surface of the light-transmitting roof test piece, the average illuminance received by the outer surface of the light-transmitting roof test piece, and the thermal parameters of the return air system, the supply and return water system, the heat metering device, the test piece frame and the light-transmitting roof test piece under the spraying condition;

[0019] calculating the light-thermal performance of the spray-type light-transmitting roof according to the average radiation intensity of the outer surface of the light-transmitting roof test piece, the average illuminance received by the outer surface of the light-transmitting roof test piece and the thermal parameters.

[0020] Beneficial effects: The light-transmitting roof light-thermal performance multi-sensor detection device and the detection method can accurately simulate the environmental conditions of different boundary conditions, different steady-state meteorological conditions and dynamic meteorological conditions under the spraying condition through the external environment simulation device and the spray device, and accurately detect the light-thermal performance of the spray-type light-transmitting roof under the foregoing conditions through the heat metering device, so that the solar radiation intensity received by the light-transmitting enclosure surface under the spraying condition can be accurately measured, and the light-thermal performance of the spray-type light-transmitting roof under different boundary conditions can be monitored and evaluated. The present application further makes the temperature in the heat metering device quickly and stably in the preset range through the supply and return water system and the supply and return air system, so as to further improve the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort, and these are within the protection scope of the present application.

[0022] Figure 1 It is a front view of the light-heat performance detection device for the spray type light-transmitting roof of the present application.

[0023] Figure 2 It is a top view of the light-heat performance detection device for the spray type light-transmitting roof of the present application.

[0024] Figure 3 It is a flowchart of the light-heat performance detection method for the spray type light-transmitting roof of the present application.

[0025] Figure 4 It is a flowchart of the method for determining the artificial light source control parameters according to the experimental requirements in the present application.

[0026] Figure 5 It is a fitting curve of the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source in the present application.

[0027] Figure 6 It is a relationship diagram between the hourly solar radiation intensity value and the corresponding artificial light source hourly setting value in the present application.

[0028] Figure 7 It is a flowchart of the method for obtaining each detection parameter in the present application.

[0029] Figure 8 It is a flowchart of the method for calculating the light-heat performance index of the spray type light-transmitting roof in the present application.

[0030] Figure 9 It is a light-heat performance detection result diagram of the spray type light-transmitting roof under the boundary condition of example 1 in the present application.

[0031] Figure 10 It is a light-heat performance detection result diagram of the spray type light-transmitting roof under the boundary condition of example 2 in the present application.

[0032] The components in the drawings and their numbers are as follows:

[0033] The outer environment box 11, the artificial light source 12, the light-transmitting roof test piece 20, the spray water supply pipe 31, the nozzle 32, the heat metering box 41, the heat collector 42, the air conditioner 51, the air supply pipeline 52, the air supply port 53, the air return port 54, the fan 55, the air supply grille 56, the air return grille 57, the water supply pipeline 61, the water return pipeline 62, the water pump 63, the valve 64, the water supply temperature sensor 601, the water return temperature sensor 602, the flow meter 603, the first temperature sensor 501, the second temperature sensor 502, the air inlet temperature sensor 503, the first light source radiation intensity sensor 101, the second light source radiation intensity sensor 102, the first illuminance sensor 103, the third light source radiation intensity sensor 401, and the second illuminance sensor 402. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. It should be noted that, in this document, relational terms such as first and second and the like are used only to differentiate one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present application, it should be understood that the terms “center”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on 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 therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Moreover, the terms “include”, “contain” or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the elements defined by the statement “include” do not exclude the presence of other identical elements in the process, method, article or device including the elements. If there is no conflict, the embodiments of the present application and the various features in the embodiments can be combined with each other, and are all within the protection scope of the present application.

[0035] Embodiment 1

[0036] As shown in Figure 1 and Figure 2 The present embodiment provides a spray type light-transmitting roof light-heat performance detection device, which mainly comprises an outer environment simulation device, a light-transmitting roof test piece 20, a heat metering device, an air supply and return system, a water supply and return system, a spray device and a spray system.

[0037] The external environment simulation device is used to simulate various meteorological conditions outside the light-transmitting roof, including but not limited to different steady-state meteorological conditions and different dynamic meteorological conditions. The external environment simulation device in the embodiment mainly comprises an external environment box 11 and an artificial light source 12 installed in the external environment box 11.

[0038] The artificial light source 12 is used to simulate solar radiation. The artificial light source 12 uses a light source with a spectrum close to that of sunlight, such as a xenon lamp, and the light rays of the artificial light source 12 are as parallel and uniform as possible. In addition, the intensity of the solar radiation simulated by the artificial light source 12 is adjustable in the range of 0-1000 W / m 2 In the embodiment, the cross-sectional size of the external environment box 11 is 2.5 m x 2.5 m, and the parameter adjustment range is: wind speed 0.5-10 m / s, temperature 10-40℃, and relative humidity 40%-98%. A hole is provided on the lower side wall of the external environment box 11, and a light-transmitting roof test piece 20 to be tested can be installed;

[0039] The light-transmitting roof test piece 20 is installed at the lower side wall of the external environment box 11, and the light-transmitting roof test piece 20 is located below the artificial light source 12;

[0040] The spray device in the embodiment comprises a spray nozzle 32, which is located below the artificial light source 12 and above the light-transmitting roof test piece 20;

[0041] The spray nozzle 32 is used to spray the light-transmitting roof test piece 20 from above, and the artificial light source 12 irradiates the light-transmitting roof test piece 20 from above after the spray nozzle 32 is turned on, thereby accurately simulating the scene when sunlight irradiates the light-transmitting roof under the condition of spraying, and laying a foundation for subsequent accurate detection of the light-thermal performance of the spray-type light-transmitting roof.

[0042] The heat metering device is used to detect the indoor heat gain through the light-transmitting roof test piece. The heat metering device in the embodiment mainly comprises a heat metering box 41 and a plurality of detection sensors, and the heat metering box 41 is located below the light-transmitting roof test piece 20;

[0043] In specific implementation, the heat metering box 41 is located directly below the light-transmitting roof test piece 20 to be tested, and a heat collector 42 with a pure black installation surface and a solar radiation absorption coefficient greater than 0.95 is installed.

[0044] The air supply and return system is in communication with the heat metering device. The air supply and return system in this embodiment is used to circulate air flow to the heat metering device, and the air speed, temperature, humidity and other parameters of the air supply and return system are controlled to quickly stabilize the air temperature in the heat metering box 41 in the preset range. The parameter adjustment range is: air speed 0.5-10 m / s, temperature 18-26℃, relative humidity 55%-65%.

[0045] The size of the heat metering box 41 can be set to 2.5m x 2.5m x 1.0m, which makes the volume small and is conducive to the air supply and return system to quickly stabilize the temperature.

[0046] The water supply and return system is used to circulate water for the air supply and return system, and the water of the water supply and return system can exchange heat with the air supply and return system to control the temperature of the air supply of the air supply and return system; the water supply and return system is in communication with the air supply and return system.

[0047] The control system of this embodiment is used to control the external environment simulation device, the heat metering device, the air supply and return system, the water supply and return system and the spraying device. In specific implementation, corresponding control modules can be respectively arranged for the environment simulation device, the heat metering device, the air supply and return system, the water supply and return system and the spraying device for control. The control system is electrically connected with the external environment simulation device, the heat metering device, the air supply and return system, the water supply and return system and the spraying device.

[0048] The air supply and return system includes an air conditioner 51, an air supply pipeline 52, an air supply port 53, an air return port 54 and a fan 55, the fan 55 is arranged in the air supply pipeline 52, the air inlet of the air conditioner 51 is in communication with the air return port 54 through the air supply pipeline 52, the air outlet of the air conditioner 51 is in communication with the air supply port 53, the air supply port 53 and the air outlet are respectively located at opposite ends of the external environment box 11, the external environment box 11 is further provided with an air supply grille 56 and an air return grille 57, the first temperature sensor 501 is arranged on the side of the air supply grille away from the air supply port 53, and the second temperature sensor 502 is arranged on the side of the air return grille 57 facing the air return port 54.

[0049] The first temperature sensor 501 is used to detect the air outlet temperature Ta2 of the air conditioner 51, and the second temperature sensor 502 is used to detect the air return temperature Ta3 of the heat meter box 41. The air adjusted by the air conditioner 51 is sent out from the air outlet of the air conditioner 51 and transported into the heat meter box 41 through the air supply opening 53. The air in the heat meter box 41 enters the air supply pipeline 52 from the air return opening 54 and returns to the air conditioner 51 through the air supply pipeline 52 and the air inlet of the air conditioner 51. In order to make the air in the air supply system circulate, a fan 55 is arranged in the air supply pipeline 52 in this embodiment. In order to improve the air supply effect, the fan 55 can be an axial flow fan. The air supply grille 56 and the air return grille 57 arranged in the heat meter box 41 can improve the uniformity of the internal flow field of the heat meter box 41, thereby facilitating the rapid and stable temperature of the heat meter box 41. An air inlet temperature sensor 503 of the air conditioner 51 is also arranged at the air inlet of the air conditioner 51 to detect the temperature of the air inlet of the air conditioner 51.

[0050] In this embodiment, the water supply and return system includes a water supply pipeline 61, a water return pipeline 62 and a water pump 63. The water pump 63 pumps water from the water supply pipeline 61 to the air conditioner 51 and flows back to the water pump 63 through the water return pipeline 62 after heat exchange at the air conditioner 51.

[0051] The water pump 63 is installed on the water supply pipeline 61, and a water supply temperature sensor 601 is arranged on the water supply pipeline 61 to detect the system water supply temperature. The water return pipeline 62 is also provided with a flow meter 603 to measure the flow of the water supply and return system, and a water return temperature sensor 602 is arranged to detect the system water return temperature. The water return pipeline 62 is connected with the water inlet of the water tank, and the water supply pipeline 61 is connected with the water outlet of the water tank. In addition, the water supply and return system is also provided with a valve 64 which can directly connect the water return pipeline 62 and the water supply pipeline 61.

[0052] The first light source radiation intensity sensor 101, the second light source radiation intensity sensor 102 and the first illuminance sensor 103 are also arranged in the external environment box 11. The first light source radiation intensity sensor 101 is located below the artificial light source 12 and above the nozzle 32, the second light source radiation intensity sensor 102 and the illuminance sensor are located below the nozzle 32 and below the light-transmitting roof specimen 20.

[0053] The first light source radiation intensity sensor 101 can detect the radiation intensity of the artificial light source 12 without spraying, the second light source radiation intensity sensor 102 can detect the radiation intensity of the artificial light source 12 under the condition of spraying, and the first illuminance sensor 103 can detect the illuminance outside the specimen under the condition of spraying.

[0054] The several detection sensors of the heat metering device in the embodiment include a third light source radiation intensity sensor 401 and a second illuminance sensor 402. The third light source radiation intensity sensor 401 is used to detect the radiation intensity in the heat metering box 41 below the light-transmitting roof test piece 20. The second illuminance sensor 402 is used to detect the illuminance in the heat metering box 41 below the light-transmitting roof test piece 20.

[0055] In the embodiment, the spraying device further includes a spraying water supply pipe 31, the spraying water supply pipe 31 is in communication with a water source, and the nozzle 32 is in communication with the spraying water supply pipe 31. The spraying water supply pipe 31 delivers tap water to the position of the nozzle 32 and sprays the tap water above the test piece by the nozzle 32.

[0056] Embodiment 2

[0057] The embodiment also provides a spraying type light-transmitting roof light-heat performance detection method, which utilizes the spraying type light-transmitting roof light-heat performance detection device in the embodiment 1 to perform detection, as shown in the following Figure 3 The method includes the following steps:

[0058] S1: obtaining a preset experiment requirement;

[0059] S2: determining a man-made light source control parameter according to the preset experiment requirement;

[0060] S3: controlling the man-made light source to work according to the man-made light source control parameter;

[0061] S4: controlling a water supply and return system to circulate water to a supply and return air system, controlling the supply and return air system to circulate air to a heat metering box, and controlling a spraying device to spray above a light-transmitting roof test piece;

[0062] S5: obtaining an average radiation intensity of an outer surface of the light-transmitting roof test piece, an average illuminance received by the outer surface of the light-transmitting roof test piece, and thermal parameters of the supply and return air system, the heat metering box, a test piece frame, and the light-transmitting roof test piece under the spraying condition;

[0063] S6: calculating a light-heat performance of the spraying type light-transmitting roof according to the average radiation intensity of the outer surface of the light-transmitting roof test piece, the average illuminance received by the outer surface of the light-transmitting roof test piece, and the thermal parameters.

[0064] As shown in the following Figure 4 S2: determining a man-made light source control parameter, a supply and return air system control parameter, and a water supply and return system control parameter according to the preset experiment requirement:

[0065] S21: obtaining a preset average radiation intensity of an outer surface of a light-transmitting roof test piece according to the experiment requirement;

[0066] S22: Obtain the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source;

[0067] The corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source can be obtained by experiment under dry conditions and by fitting data through experiment, specifically including:

[0068] S221: Control the water supply and return system to circulate water to the air supply system, and control the air supply and return system to circulate air to the heat metering box;

[0069] S222: Divide the outer surface of the light-transmitting roof test piece into a plurality of area regions;

[0070] S223: Control the artificial light source to output according to the set output radiation intensity;

[0071] S224: Measure the output radiation intensity of the artificial light source of each area region;

[0072] S225: Calculate the average output radiation intensity of the artificial light source of the light-transmitting roof test piece corresponding to the current artificial light source set output radiation intensity according to the output radiation intensity of the artificial light source of each area region;

[0073] S226: Calculate the average output radiation intensity of the artificial light source of the light-transmitting roof test piece according to the output radiation intensity of the artificial light source of each area region;

[0074] S227: Repeat steps S224 to S226 after changing the set artificial light source output radiation intensity until the average output radiation intensity of the artificial light source corresponding to all set artificial light source output radiation intensities is obtained;

[0075] S228: Obtain the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source by fitting the average output radiation intensity of the artificial light source corresponding to the set output radiation intensity of the artificial light source of each set using a regression model s = f(S m,ave ). Wherein S s is the output radiation intensity of the artificial light source, and S m,ave is the average radiation intensity of the test piece outer surface. Wherein the output radiation intensity of the artificial light source can be detected by the first light source radiation intensity sensor arranged below the artificial light source and above the spray device.

[0076] Wherein S222: the dividing of the outer surface of the light-transmitting roof test piece into a plurality of area regions includes: determining the number N of the divided area regions according to the light source distance test piece surface height H, test piece surface area A s , and the number N l of artificial light source lampsm , where N m Negatively correlated with H and negatively correlated with A s and N l For example, for H = 1.5 to 2.5 m, A s =1.5*1.5=2.25m2, N l =9 device, N m 9 or 16 are preferred.

[0077] like Figure 5 As shown, the corresponding relationship obtained through experiments is S s =0.6293×S m,ave -22.935.

[0078] S23: determining a preset output radiation intensity of the corresponding artificial light source according to the preset average radiation intensity of the outer surface of the light-transmitting roof test piece and the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source.

[0079] For example, according to the experimental requirements, the radiation intensity S m,ave 600W / m 2 When the radiation intensity is substituted into the corresponding relationship, the preset output radiation intensity of the artificial light source is calculated to be 354.6W / m 2 .

[0080] For example, when conducting a dynamic experiment, the required hourly solar radiation intensity (the value is S m,ave ) Calculate the hourly setting value S of the artificial light source s For example, taking the hourly solar radiation intensity of Guangzhou’s typical day weather data as an example, the hourly setting value S of the artificial light source can be calculated based on the above corresponding relationship. s , the calculation results are as follows Figure 6 shown.

[0081] like Figure 7 As shown, in this embodiment, the S5: obtaining the average radiation intensity and the average illuminance received by the outer surface of the light-transmitting roof test piece under the spray condition, as well as the thermal parameters of the second supply and return air system, the supply and return water system, the heat metering box, the test piece frame, and the light-transmitting roof test piece include:

[0082] S51: Obtain the output radiation intensity of the current artificial light source;

[0083] S52: determining the average radiation intensity of the outer surface of the corresponding light-transmitting roof test piece according to the corresponding relationship between the output radiation intensity of the current artificial light source and the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source;

[0084] The method for accurately obtaining the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source has been described in detail in the foregoing, and will not be described here.

[0085] S53: Obtain the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the average illuminance received by the outer surface of the light-transmitting roof test piece;

[0086] This step specifically includes:

[0087] S521: Divide the outer surface of the light-transmitting roof test piece into a plurality of area regions;

[0088] S522: Control the artificial light source to output according to the set output radiation intensity;

[0089] S523: Measure the radiation intensity and the illuminance of each area region; specifically, the second radiation intensity sensor and the first illuminance sensor arranged below the nozzle and above the light-transmitting roof test piece can be used to detect the radiation intensity and the illuminance of each area region, respectively;

[0090] S524: Obtain the average radiation intensity of the outer surface of the light-transmitting roof test piece according to the radiation intensity of each area region, and obtain the corresponding average illuminance received by the outer surface of the light-transmitting roof test piece according to the illuminance of each area region;

[0091] S525: Determine the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the average illuminance received by the outer surface of the light-transmitting roof test piece under the spray condition through a regression model according to the average radiation intensity of the outer surface of the light-transmitting roof test piece and the corresponding average illuminance of the artificial light source;

[0092] The regression model obtained through experiments is: I m,ave = 42.391 x S m,ave + 1645.4. I m,ave is the average illuminance received by the outer surface of the light-transmitting roof test piece.

[0093] S54: Determine the corresponding average illuminance received by the outer surface of the light-transmitting roof test piece according to the average radiation intensity of the outer surface of the light-transmitting roof test piece and the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the average illuminance received by the outer surface of the light-transmitting roof test piece;

[0094] Since the spray-type light-transmitting roof photothermal performance detection needs to be detected under the spray condition, but the detection of the radiation intensity of the outer surface of the light-transmitting roof test piece and the illuminance received by the outer surface of the test piece by the sensor will be affected by the spray, how to accurately obtain the radiation intensity of the outer surface of the light-transmitting roof test piece and the illuminance received by the outer surface of the test piece under the spray condition has been a problem that has plagued technical personnel in the field for a long time.

[0095] To address this issue, this embodiment employs an indirect detection method for the average radiation intensity and average radiation intensity of the outer surface of the light-transmitting roof test piece under spray conditions. A first light source radiation sensor positioned above the spray device detects the radiation intensity at the current location. The corresponding average radiation intensity of the outer surface of the light-transmitting roof test piece is then determined using the corresponding relationship between the output radiation intensity of the artificial light source at that location and the average radiation intensity of the outer surface of the light-transmitting roof test piece and the output radiation intensity of the artificial light source. The corresponding average illuminance received by the outer surface of the light-transmitting roof test piece is then determined based on the corresponding relationship between the average radiation intensity of the outer surface of the light-transmitting roof test piece and the average illuminance received by the outer surface of the light-transmitting roof test piece. Because the first light source radiation sensor is unaffected by the spray device, the radiation intensity detected by the first light source radiation sensor above the spray device and the aforementioned corresponding relationship can be used to accurately convert the average radiation intensity and average illuminance received by the outer surface of the light-transmitting roof test piece unaffected by the spray.

[0096] S54: Detect the air inlet temperature and outlet temperature of the air conditioner in the supply and return air system, detect the return air temperature of the heat metering box, detect the inner and outer surface temperatures of the four walls of the heat metering box, detect the air conditioner water inlet temperature and outlet water temperature of the air conditioner supply and return water system, detect the inner and outer surface temperatures of the test piece frame, detect the inner and outer surface temperatures of the light-transmitting roof test piece, and detect the average solar radiation intensity and average illumination received by the lower surface of the test piece.

[0097] like Figure 8 As shown, in this embodiment, the step S6 of calculating the photothermal performance of the spray-type translucent roof according to the average radiation intensity of the outer surface of the translucent roof test piece, the average illuminance received by the outer surface of the translucent roof test piece, and the thermal parameters includes:

[0098] S61: According to thermal parameters and formulas

[0099]

[0100] Calculate the indoor solar radiation heat gain Q t The thermal parameters include: the heat capacity C of cooling water, the density ρ of cooling water, the inlet water temperature T of air conditioner w,i , air conditioner outlet water temperature T w,e , cooling water flow G, air inlet temperature T of the air conditioner for the supply and return air system a1 , air conditioner outlet temperature T a2 , heat metering box return air temperature T a3 , the inner surface temperature of the four walls of the heat metering box is T bx,i , the outer surface temperature of the four walls of the heat metering box is T bx,e , the inner surface temperature of the specimen frame Tkx,i the outer surface temperature T of the test frame kx,e where x e {1, 2, 3, 4}, the heat flux coefficient per unit area M of the heat metering box bx the surface area A of the heat metering box bx the heat flux coefficient per unit area M of the test frame kx the surface area A of the test frame kx the inner surface temperature T of the light-transmitting roof test piece s,i the outer surface temperature T s,e the heat flux coefficient per unit area M of the light-transmitting roof test piece s and the surface area A of the light-transmitting roof test piece s ;

[0101] S62: calculating the solar heat gain coefficient SHGC according to the formula , wherein S m,ave is the average radiation intensity of the outer surface of the light-transmitting roof test piece;

[0102] S63: calculating T sol according to the formula r,ave = S m,ave / S sol , wherein S r,ave is the average solar radiation intensity received by the lower surface of the light-transmitting roof test piece;

[0103] S64: calculating T vis according to the formula r,ave = I m,ave / I vis , wherein I r,ave is the average illuminance received by the lower surface of the light-transmitting roof test piece, and I m,ave is the average illuminance received by the outer surface of the light-transmitting roof test piece.

[0104] In order to more accurately obtain the light-heat performance of the light-transmitting roof, the detection results can be corrected by the following method, and the S6: calculating the light-heat performance of the spray-type light-transmitting roof according to the average radiation intensity of the outer surface of the light-transmitting roof test piece, the average illuminance received by the outer surface of the light-transmitting roof test piece, and the thermal parameters comprises:

[0105] S65: determining the residual water amount of the outer surface of the light-transmitting roof test piece according to the spray flow and the drainage amount of the outer surface of the light-transmitting roof test piece;

[0106] wherein the residual water amount Vf = Vspray-Vdrain, wherein Vspray is the spray flow, and Vdrain is the drainage amount.

[0107] S66: determining the thickness of the water film of the outer surface of the light-transmitting roof test piece according to the residual water amount of the outer surface of the light-transmitting roof test piece and

[0108] where the thickness of the water film is δfilm= (Vspray-Vdrain-Mevap) / p w / As, where p w is the density of water.

[0109] S67: determining the evaporation amount of the water on the outer surface of the light-transmitting roof test piece according to the outer surface temperature of the light-transmitting roof test piece and the ambient air humidity;

[0110] where the evaporation amount mevap is the evaporation rate per unit area (kg / (m 2 ·s));

[0111] mevap= hm[Psat(Tsurf)-Pv,air]. hm is the mass transfer coefficient (kg / (m 2 ·s·Pa)), which can be calibrated by experiments, Psat(Tsurf) is the saturated water vapor partial pressure (Pa) of water at the film surface temperature Tsurf, and Pv,air is the actual water vapor partial pressure (Pa) of indoor / outdoor air, which can be calculated from the relative humidity, air pressure, and temperature.

[0112] The evaporation mass for a period of time At is: mevap= mevap×As×At.

[0113] S68: correcting the indoor heat gain Q t from solar radiation according to the evaporation amount of the water on the outer surface of the light-transmitting roof test piece, and updating the solar heat gain coefficient SHGC according to the corrected indoor heat gain Q t from solar radiation.

[0114] that is, subtracting the heat taken away by the evaporation of the water on the outer surface to obtain the corrected Q t from solar radiation, and then updating the solar heat gain coefficient SHGC according to the corrected indoor heat gain Q t from solar radiation. t

[0115] S68: obtaining an optical correction factor according to the thickness of the water film.

[0116] This step first establishes the correlation between the thickness of the water film and the change in optical transmission, and a corresponding relationship between the "water film thickness" and the "optical transmission change value" can be established based on reference data or calibrated by experiments before or during the experiment.

[0117] The corresponding relationship can be expressed as: when the water film is in a certain thickness interval, the transmittance of the light-transmitting material increases or decreases by how much (which can be expressed as a ratio or percentage) compared to the dry condition.

[0118] ​The water film thickness-optical transmission change correspondence is combined to determine the transmittance adjustment amount of the roof under the current working condition. The adjustment amount is defined as an optical correction factor. For example, the transmittance is a certain reference value under dry conditions, and the transmittance change caused by the water film is within a percentage range. The percentage change or ratio change can be used as the optical correction factor. If the optical correction factor is greater than 1, it indicates that the water film causes the transmittance to be higher than that under dry working conditions. If the optical correction factor is less than 1, it indicates that the transmittance is reduced. The optical correction factor is output and stored as key reference data for subsequent correction of solar radiation transmittance and visible light transmittance.

[0119] S69: Correcting the solar radiation direct transmittance and the visible light transmittance according to the optical correction factor;

[0120] This step multiplies the original solar radiation direct transmittance by the optical correction factor to obtain the corrected solar radiation direct transmittance, and multiplies the original visible light transmittance by the optical correction factor to obtain the corrected visible light transmittance. These two correction values can better reflect the optical changes caused by the water film formed on the roof surface under the spraying working condition.

[0121] The following describes an example of detecting the light-heat performance of a light-transmitting roof under different boundary conditions using the device and method of the present application.

[0122] Example 1

[0123] Taking a double-layer hollow glass light-transmitting roof configured as 6mm white glass + 12mm argon + 6mm white glass as an example, according to the JGJ / T151-2008 “Building Door and Window Glass Curtain Wall Thermal Calculation Regulation”, the theoretical calculation value of SHGC is 0.70.

[0124] At the same time, the boundary conditions of the above calculation regulation are reproduced using the detection device and method provided by the present application, wherein the temperature of the external environment box is set to 30℃, the wind speed is 2m / s, and the solar radiation intensity received by the surface of the glass test piece is ensured to be 500W / m 2 The temperature of the thermal metering box is set to 25℃. After the device is stable, the SHGC measured value is calculated according to the formula to be 0.702, and the relative error with the theoretical calculation value is only 0.3%, which indicates that the accuracy of the detection device is high. The curve measured by SHGC is shown in Figure 9 .

[0125] Example 2

[0126] In order to further fully verify the accuracy of the detection device on the basis of example 1, the boundary conditions are changed according to GB / T 30592-2014 "Translucent envelope solar heat gain coefficient detection method", wherein the outer environment box is set to 26.5℃, the wind speed is 2m / s, and the solar radiation intensity received by the surface of the glass sample is ensured to be 600W / m 2 After the device is stable, the SHGC measured value calculated by the method of the application is 0.73, and the relative error with the theoretical calculation value is only 4.3%, which indicates that the accuracy of the detection device is high.

[0127] It should be noted that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, detailed descriptions of well-known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after understanding the spirit of the present application. The functional blocks shown in the above structure block diagram can be implemented as hardware, software, firmware or their combination. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, etc. When implemented in software, the elements of the present application are program or code segment used to perform the required tasks. The program or code segment can be stored in a machine readable medium or transmitted on a transmission medium or communication link through a data signal carried in a carrier wave. The "machine readable medium" can include any medium capable of storing or transmitting information. Examples of machine readable medium include electronic circuit, semiconductor memory device, ROM, flash memory, erasable ROM (EROM), floppy disk, CD-ROM, optical disk, hard disk, optical fiber medium, radio frequency (RF) link, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc. It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in an order different from the embodiments, or several steps can be performed simultaneously.

[0128] The above merely describes specific implementation of the present application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, module and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein again. It should be understood that the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A multi-sensor detection device for photovoltaic-thermal performance of a transparent roof, characterized in that, The device comprises: an external environment simulation device, including an external environment box, an artificial light source, and the artificial light source being installed in the external environment box; a light-transmitting roof test piece, which is installed at the lower side wall of the external environment box and is located below the artificial light source; a spraying device, including a nozzle, which is located below the artificial light source and above the light-transmitting roof test piece, and the external environment box is further provided with a first light source radiation intensity sensor, a second light source radiation intensity sensor, and a first illuminance sensor, wherein the first light source radiation intensity sensor is located below the artificial light source and above the nozzle, and the second light source radiation intensity sensor and the first illuminance sensor are located below the nozzle and above the light-transmitting roof test piece; a heat metering device, including a heat metering box, a third light source radiation intensity sensor, and a second illuminance sensor, and the heat metering box is located below the light-transmitting roof test piece; an air supply and return system for circulating air flow to the heat metering device, which is in communication with the heat metering device; a water supply and return system for supplying water to the air supply and return system, which is in communication with the air supply and return system; a control system for controlling the external environment simulation device, the heat metering device, the air supply and return system, the water supply and return system, and the spraying device, which is electrically connected with the external environment simulation device, the heat metering device, the air supply and return system, the water supply and return system, and the spraying device; the air supply and return system includes an air conditioner, an air supply pipeline, an air supply port, an air return port, and a fan, the fan is arranged in the air supply pipeline, the air supply port and the air return port are respectively located at opposite ends of the external environment box, the air inlet of the air conditioner is in communication with the air return port through the air supply pipeline, and the air outlet of the air conditioner is in communication with the air supply port; the heat metering box is further provided with an air supply grille and an air return grille, the first temperature sensor is arranged on the side of the air supply grille facing away from the air supply port, and the second temperature sensor is arranged on the side of the air return grille facing the air return port.

2. The transparent roofing light-thermal performance multi-sensor detection device according to claim 1, characterized in that, a heat collector is arranged directly below the light-transmitting roof test piece.

3. The transparent roofing light-thermal performance multi-sensor detection device according to claim 2, characterized in that, The solar radiation absorption coefficient of the heat collector is greater than 0.

95.

4. The light-transmitting roofing light-thermal performance multi-sensor detection device according to claim 1, characterized in that, The water supply and return system further comprises a water supply pipeline, a water return pipeline, and a water pump, the water pump pumps water from the water supply pipeline to the air conditioner, and the water returns to the water pump from the water return pipeline after heat exchange at the air conditioner.

5. The light-transmitting roofing light-thermal performance multi-sensor detection device according to claim 4, characterized in that, A water supply temperature sensor is further arranged on the water supply pipeline, a flow meter and a water return temperature sensor are further arranged on the water return pipeline.

6. The light-transmitting roofing light-thermal performance multi-sensor detection device according to claim 4, characterized in that, The water return pipeline is connected with the water inlet of the water tank, the water supply pipeline is connected with the water outlet of the water tank, and the water supply and return system is further provided with a valve directly connecting the water return pipeline and the water supply pipeline.

7. The transparent roofing photothermal performance multi-sensor detection device according to any one of claims 1 to 6, characterized in that, The spraying device further comprises a spraying water supply pipe, the spraying water supply pipe is in communication with a water source, and the nozzle is in communication with the spraying water supply pipe.

8. A method for detecting the light-thermal performance of a transparent roof by using multiple sensors, characterized in that, The method comprises: acquiring preset experimental requirements; determining artificial light source control parameters according to the preset experimental requirements; controlling the artificial light source to work according to the artificial light source control parameters; controlling the water supply and return system to circulate water to the air supply and return system, controlling the air supply and return system to circulate air to the heat metering box, and controlling the spraying device to spray above the light-transmitting roof test piece; acquiring the average radiation intensity of the outer surface of the light-transmitting roof test piece under the spraying condition, the average illumination received by the outer surface of the light-transmitting roof test piece, and the thermal parameters of the air supply and return system, the water supply and return system, the heat metering box, the test piece frame, and the light-transmitting roof test piece; calculating the light-thermal performance of the spraying light-transmitting roof according to the average radiation intensity of the outer surface of the light-transmitting roof test piece, the average illumination received by the outer surface of the light-transmitting roof test piece, and the thermal parameters.

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