Building material type roof photovoltaic module containing intelligent heat dissipation system and method

Abstract

The invention discloses a building material type roof photovoltaic module containing an intelligent heat dissipation system and a method. The building material type roof photovoltaic assembly is composed of a photovoltaic assembly body, a heat collection plate, a heat dissipation channel, a waterproof breathable layer, a heat preservation material, a waterproof vapor-proof layer, a roof panel and other structural layers from top to bottom, and the intelligent heat dissipation system is integrated with the photovoltaic assembly body, the heat collection plate and the heat dissipation channel and comprises a temperature sensor, an irradiation monitor, a controller and an air supply / exhaust device. According to the building material type roof photovoltaic module, intelligent control over the working temperature of the building material type roof photovoltaic module can be achieved. The photovoltaic module can provide power for parts in the intelligent heat dissipation system, so that the photovoltaic module does not depend on a public power grid, and energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic buildings, and in particular to a building material type roof photovoltaic assembly with an intelligent heat dissipation system and a method thereof. Background Art

[0002] Energy consumption is the main source of carbon dioxide emissions in my country. Low-carbon and zero-carbon energy transformation is the key to achieving carbon peak and carbon neutrality. Photovoltaic power generation technology can use solar energy, a renewable energy source, to generate electricity, reducing dependence on fossil fuels. It is a clean and environmentally friendly way of generating electricity, and has important practical significance for achieving energy conservation, emission reduction, and environmental protection. The combination of photovoltaics and the construction industry can enable the construction industry to move from passive energy conservation to active production capacity, and gradually enter an era of building energy conservation and production capacity.

[0003] There are two main forms of integration between buildings and photovoltaics: one is to install a photovoltaic power generation system on the building (BAPV), and the other is building integrated photovoltaics (BIPV). As a technology that perfectly combines solar power generation with architecture, BIPV can not only effectively reduce building energy consumption and achieve energy self-sufficiency, but also improve the aesthetics and functionality of the building. It is an important development trend in the field of building photovoltaics. Solar photovoltaic products have the characteristics of building materials and components, and are an important direction for the development of photovoltaic building integration.

[0004] Photothermal effect is accompanied by photovoltaic operation. Studies have shown that the band gap of crystalline silicon solar cells is 1.1eV, corresponding to a wavelength of 1.1μm. Generally, only photons with energy higher than the band gap can excite electron-hole pairs, and the solar spectrum above the band gap energy accounts for 81% of the total solar radiation. Only about a quarter of the energy can be converted into electrical energy, and the remaining three quarters of the energy is converted into thermal energy through carrier recombination and thermalization, resulting in an increase in the temperature of the module. The increase in temperature will cause the lattice expansion of the photovoltaic material, the reduction of the band gap, the increase of the reverse current density, and the decrease in the photoelectric conversion efficiency. For every 1°C increase in temperature, the photoelectric conversion efficiency of the crystalline silicon cell will decrease by 0.4% to 0.5%. In BIPV applications with poor back ventilation design and poor heat dissipation, the temperature of the photovoltaic module may even rise to above 60°C. In addition, high temperature will also cause permanent damage to the battery structure, thereby affecting the battery life. It is particularly important to control the operating temperature of the photovoltaic module. However, the photovoltaic building integrated photovoltaic modules currently used often lack sufficient cooling measures or require human intervention, resulting in excessive energy consumption or increased labor costs.

[0005] Therefore, how to more intelligently and effectively reduce the operating temperature of photovoltaic modules in photovoltaic building integration is conducive to extending the life of photovoltaic modules, protecting the structure of photovoltaic modules, and improving the utilization efficiency of photovoltaic modules, which will play a positive role in promoting the development of the national photovoltaic industry and the implementation of energy conservation and emission reduction. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a building material type roof photovoltaic assembly and method with an intelligent heat dissipation system.

[0007] According to one aspect of the present invention, the first purpose of the present invention is to provide a building material-type roof photovoltaic module with an intelligent heat dissipation system, wherein the building material-type roof photovoltaic module is composed of photovoltaic modules, heat collecting panels, heat dissipation channels, waterproof and breathable layers, thermal insulation materials, waterproof vapor barriers, roof panels and other structural layers from top to bottom, and the intelligent heat dissipation system is integrated with the photovoltaic modules, heat collecting panels and heat dissipation channels, and includes a temperature sensor, an irradiation monitor, a controller and an air supply / exhaust device.

[0008] Preferably, the photovoltaic module is one of a crystalline silicon module, a cadmium telluride module, a copper indium gallium selenide module or a perovskite module.

[0009] Preferably, the heat collecting plate is an aluminum plate or a copper plate with a high thermal conductivity.

[0010] Preferably, the heat dissipation channel is located between the heat collecting plate and the waterproof breathable layer, and the heat dissipation channel is in the form of an equal-height air gap, or the cross-section of the heat dissipation channel can be evenly arranged triangles, semi-cylinders, rectangles or trapezoids.

[0011] Preferably, the height of the heat dissipation channel is 5-20 mm, preferably 8-15 mm, and more preferably 10 mm.

[0012] Preferably, the thermal insulation material is an organic or inorganic thermal insulation material having fire resistance that meets the requirements.

[0013] Preferably, the roof panel is reinforced concrete.

[0014] Preferably, the waterproof breathable layer and the waterproof vapor barrier layer are respectively a waterproof breathable membrane and a waterproof vapor barrier membrane, wherein the waterproof breathable layer is arranged on the outdoor side of the thermal insulation layer to play a waterproof and breathable role, and the waterproof vapor barrier layer is arranged on the indoor side of the thermal insulation layer to play a waterproof and vapor barrier role, which together ensure the good waterproof and airtight performance of the roof as a whole.

[0015] Preferably, the temperature sensor in the intelligent heat dissipation system is arranged close to the photovoltaic component to monitor the temperature of the photovoltaic component.

[0016] Preferably, the radiation monitor in the intelligent heat dissipation system is arranged on the photovoltaic module to monitor the intensity of solar radiation received by the photovoltaic module.

[0017] Preferably, the temperature sensor and the radiation monitor are both electrically connected to the controller to transmit temperature signals and radiation intensity signals to the controller.

[0018] Preferably, the controller is electrically connected to the air supply / exhaust device, and sends a signal to the air supply / exhaust device to control the opening and closing of the air supply / exhaust device.

[0019] According to another aspect of the present invention, another object of the present invention is to provide an intelligent heat dissipation method for controlling a building material type roof photovoltaic assembly having an intelligent heat dissipation system, the method comprising:

[0020] The temperature sensor monitors the temperature of the collector plate, and the irradiance monitor monitors the solar radiation intensity received by the photovoltaic module. Then the temperature sensor and the irradiance monitor transmit the temperature signal and the irradiance intensity signal to the controller respectively. The controller compares the received temperature signal and the irradiance intensity signal with the stored temperature conditions and the irradiance intensity conditions. As long as one of the trigger conditions is met, a signal is sent to the air supply / exhaust device to control the opening or closing of the air supply / exhaust device.

[0021] Preferably, the air supply / exhaust device is turned on under the following conditions:

[0022] When the irradiation intensity is greater than 1100kWh / m 2 When the air supply / exhaust device is turned on; or

[0023] When the temperature of the PV module is higher than its nominal operating temperature (45±2℃) for 5 minutes, turn on the air supply / exhaust device.

[0024] Preferably, the closing condition of the air supply / exhaust device is:

[0025] When the temperature of the PV module is lower than its nominal operating temperature (45±2℃) for 5 minutes, turn off the air supply / exhaust device.

[0026] Beneficial Effects

[0027] The present invention creatively designs the structure of building material roof photovoltaic modules and their heat dissipation system, which can realize intelligent control of the working temperature of building material roof photovoltaic modules. At the same time, by setting a certain inclination angle on the roof, the heat on the top of the roof can be taken away by thermal pressure, and the top air circulation can be strengthened, thereby improving the utilization rate of renewable energy. The photovoltaic module itself can provide the power demand for the components in the intelligent heat dissipation system, so that it can be independent of the public power grid and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a schematic structural diagram of the building material type roof photovoltaic assembly according to the present invention.

[0030] Figure 2 : is a structural diagram of the heat dissipation channel, wherein (a) and (b) are respectively a stereoscopic image and a cross-sectional image of an equal-height air gap, (c) and (d) are respectively a stereoscopic image and a cross-sectional image of a gap with a rectangular cross-section, (e) and (f) are respectively a stereoscopic image and a cross-sectional image of a gap with a triangular cross-section, and (g) and (h) are respectively a stereoscopic image and a cross-sectional image of a gap with a semicircular cross-section.

[0031] Figure 3 It is a flow chart of the intelligent heat dissipation method according to the present invention.

[0032] Figure 4 Physical diagram of a photovoltaic system for setting irradiance intensity limits.

[0033] Figure 5 It is a schematic diagram of the appearance of a double-sided slope roof building according to an embodiment.

[0034] Figure 6 It is a schematic diagram of the structure of arranging different numbers of air supply / exhaust devices in the middle of the roof ridge according to an embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, the preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general and dictionary meanings, but should be interpreted based on the principle of allowing the inventor to appropriately define the terms for the best interpretation, based on the meaning and concept corresponding to the technical level of the present invention. Therefore, the description herein is only a preferred example for illustrative purposes, and is not intended to limit the scope of the present invention, so it should be understood that other equivalent implementations and modifications can be made without departing from the spirit and scope of the present invention.

[0036] In this document, the terms "include", "including", "have", "contain" or any other similar terms are open conjunctions, which are intended to cover non-exclusive inclusions. For example, a composition or product containing multiple elements is not limited to the elements listed herein, but may also include other elements that are not explicitly listed but are generally inherent to the composition or product. In addition, unless otherwise explicitly stated, the term "or" refers to an inclusive "or" rather than an exclusive "or". For example, any of the following situations satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist), A is false (or does not exist) and B is true (or exists), and A and B are both true (or exist). In addition, in this document, the interpretation of the terms "include", "including", "have", and "contain" should be considered to have been specifically disclosed and simultaneously cover closed or semi-closed conjunctions such as "consisting of" and "consisting essentially of".

[0037] In this article, all features or conditions defined in the form of numerical ranges or percentage ranges are only for brevity and convenience. Accordingly, the description of numerical ranges or percentage ranges should be deemed to have covered and specifically disclosed all possible secondary ranges and individual values ​​within the range, especially integer values. For example, the range description of "1 to 8" should be deemed to have specifically disclosed all secondary ranges such as 1 to 7, 2 to 8, 2 to 6, 3 to 6, 4 to 8, 3 to 8, etc., especially secondary ranges defined by all integer values, and should be deemed to have specifically disclosed individual values ​​such as 1, 2, 3, 4, 5, 6, 7, 8, etc. within the range. Unless otherwise specified, the above interpretation method applies to all contents of the entire present invention, regardless of whether the range is broad or not.

[0038] If the quantity or other numerical value or parameter is expressed as a range, a preferred range or a series of upper and lower limits, it should be understood that all ranges consisting of any upper limit or preferred value of the range and the lower limit or preferred value of the range have been specifically disclosed herein, regardless of whether these ranges are disclosed separately. In addition, if a numerical range is mentioned herein, unless otherwise specified, the range should include its endpoints and all integers and fractions within the range.

[0039] In order to clarify the present invention, parts irrelevant to the description are omitted in the drawings, and the same or similar components are denoted by the same reference numerals throughout the specification.

[0040] In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

[0041] Throughout the specification, when it is mentioned that a certain element is “connected” to another element, it includes not only “direct connection” but also “indirect connection” between other components. In addition, when it is mentioned that a certain element “includes” a certain component, it means that the element may further include other components rather than excluding other components, unless explicitly described to the contrary.

[0042] The building material-type roof photovoltaic assembly with an intelligent heat dissipation system according to the present invention has high flexibility and can be installed on a variety of building roofs, such as flat roofs, sloping roofs, curved roofs, etc.

[0043] like Figure 1 As shown, the building material type roof photovoltaic module is composed of photovoltaic modules, heat collecting panels, heat dissipation channels, waterproof and breathable layers, thermal insulation materials, waterproof and vapor barrier layers, roof panels and other structural layers from top to bottom. Among them, the photovoltaic modules are crystalline silicon modules, cadmium telluride modules, copper indium gallium selenide modules or perovskite modules; the heat collecting panels are aluminum plates or copper plates with high thermal conductivity; the height of the heat dissipation channel is preferably 10 mm. The form of the heat dissipation channel is as follows Figure 2 The equal-height air gaps shown (the equal-height air gaps represent the overall air passages without spatial division) or the uniformly arranged cross-sections are triangles, semi-cylindrical bodies, rectangles, trapezoids; the insulation materials are organic or inorganic insulation materials that meet the fire resistance requirements, such as aerogel insulation felt, XPS boards, EPS boards, etc.; the roof panels are reinforced concrete. The waterproof breathable layer and the waterproof vapor barrier layer are respectively a waterproof breathable membrane and a waterproof vapor barrier membrane, wherein the waterproof breathable layer is arranged on the outdoor side of the insulation layer to play the role of waterproof and breathable, and the waterproof vapor barrier layer is arranged on the indoor side of the insulation layer to play the role of waterproof and vapor barrier, which together ensure the good waterproof and airtight performance of the roof as a whole.

[0044] The building material-type roof photovoltaic assembly with an intelligent heat dissipation system according to the present invention further includes the intelligent heat dissipation system, which is integrated with the photovoltaic assembly, the heat collecting plate and the heat dissipation channel, and includes a temperature sensor, an irradiation monitor, a controller and an air supply / exhaust device.

[0045] The temperature sensor is arranged close to the photovoltaic component and is used to monitor the temperature of the photovoltaic component.

[0046] The irradiation monitor is arranged on the photovoltaic module and is used for monitoring the intensity of solar radiation received by the photovoltaic module.

[0047] The radiation monitors are all electrically connected to the controller to transmit temperature signals and radiation intensity signals to the controller.

[0048] The controller is electrically connected to the air supply / exhaust device and sends a signal to the air supply / exhaust device to control the opening and closing of the air supply / exhaust device.

[0049] The intelligent cooling system is activated when the irradiance is greater than 1100kWh / m 2 When the temperature of the photovoltaic module is continuously higher than its nominal operating temperature (45±2℃) for 5 minutes, the controller outputs a signal to turn on the air supply / exhaust device. When the temperature of the photovoltaic module is continuously lower than its nominal operating temperature (45±2℃) for 5 minutes, the air supply / exhaust device is turned off. The irradiation intensity limit can be adjusted according to the temperature coefficient of the photovoltaic module, preferably 1100kWh / m 2 .

[0050] Based on the principle of shortening the pipeline as much as possible, reducing the exhaust distance, saving materials and reducing system resistance, and facilitating construction and maintenance, the heat generated by the photovoltaic modules is discharged after being converged through the channel. The exhaust vent is located on the roof or ridge.

[0051] In order to determine the number of exhaust devices to be set, first calculate the heat that needs to be removed by air cooling (i.e. the heat generated by the photovoltaic modules), simulate the inlet and outlet air temperatures of the photovoltaic modules after a certain period of air cooling, and then calculate the required air volume. Then, combine the exhaust partitions of the photovoltaic modules, the air volume required for cooling, and the product parameters to match the exhaust devices. The specific calculation process is as follows:

[0052] The heat generated by the photovoltaic module is calculated according to Formula 1, that is, the heat that needs to be removed by air cooling.

[0053] Q0=Isα(100%-β) (Formula 1)

[0054] Q0 represents the heat generated by the photovoltaic module, the unit is W; I represents the incident light intensity, the unit is W / m 2 ; s represents the area of ​​PV panels, in m 2 ; α represents the absorption coefficient of photovoltaic modules to solar radiation, the unit is %; β represents the photoelectric conversion efficiency of photovoltaic modules, the unit is %.

[0055] According to Formula 2, calculate the air volume required to remove the heat of the photovoltaic components using air:

[0056] Q = cmΔT (Equation 2)

[0057] Q represents the heat absorbed by the air, in J; C represents the specific heat capacity, in J / kg·℃. In this paper, the specific heat capacity of air is taken as 1.0×10 3 J / (kg·℃); m represents mass, in kg; ΔT represents temperature difference, in ℃. The relationship between the heat Q0 generated by the photovoltaic module and the heat Q that the air needs to take away from the photovoltaic module is as follows: Equation 3, where t represents time, in h.

[0058]

[0059] Regarding the irradiation intensity limit of 1100kWh / m 2 The basis for setting:

[0060] A photovoltaic system was built on the open space to test the power generation. At the same time, weather, solar irradiance, temperature, wind speed, rain and snow and other meteorological parameters were monitored to analyze the relationship between the power generation of photovoltaic modules and solar irradiation. The photovoltaic modules used were JA Solar JAM72S30-555 / MR monocrystalline silicon modules with a peak power of 555Wp. The photovoltaic array was arranged facing south with an inclination of 23°. The inverter used was GoodWe GW5000 with a rated output power of 5kW. The actual construction scene is as follows: Figure 4 The test results of power generation and solar irradiance for 5 consecutive days from June 26, 2024 to June 30, 2024 are shown in Table 1.

[0061] As can be seen from Table 1, the daily power generation curve and the irradiation curve show the same change pattern. As the solar irradiation increases, the power generation of the photovoltaic system increases. However, the time when the power generation reaches its peak is later than the time when the irradiance reaches its peak. From June 26, 2024 to June 30, 2024, it is 21min, 3min, 20min, 58min, and 0min later respectively. Moreover, the greater the irradiance peak, the longer the interval between the time when the power generation reaches its peak and the time when the irradiance reaches its peak. This is because when the irradiance reaches a certain level, it will cause the temperature of the photovoltaic module to rise, thereby causing a decrease in power generation; the greater the irradiance peak, the greater the power generation loss caused by the temperature increase, and the longer the interval between the power generation peak and the irradiation peak.

[0062] Analyzing the test results of 5 days, the interval between the power generation peak and the irradiation peak is from large to small: 4#, 1#, 3#, 2#, 5#; the irradiation peak is from large to small: 4#, 1#, 3#, 5#, 2#; the power generation peak is from large to small: 4#, 1#, 5#, 3#, 2#. This shows that the degree of impact on photovoltaic modules is strongly correlated with the irradiation peak.

[0063] The intervals between 2# and 5# are the shortest, indicating that the peak irradiance is 1100kWh / m 2 At the same time, according to the 10th China Wind and Solar Energy Resources Bulletin released by the Wind and Solar Energy Center of the China Meteorological Administration, in 2023, the total irradiance on the best slope in most parts of my country will exceed 1100kWh / m 2 .

[0064] Table 1 Photovoltaic system test irradiance and power generation performance test results

[0065]

[0066] The following examples are only listed as examples of embodiments of the present invention and do not constitute any limitation to the present invention. It can be understood by those skilled in the art that modifications within the scope of the essence and concept of the present invention fall within the scope of protection of the present invention. Unless otherwise specified, the reagents and instruments used in the following examples are all commercially available products.

[0067] Example

[0068] Design a simulation experiment in which the irradiance of incident sunlight is 1200W / m 2 The size of a single photovoltaic module is 2256mm×1133mm, the incident light power received on the front is 3045.5W, and the absorption coefficient is 90% (10% is reflected back into the atmosphere), then the actual module absorbs 2760.5W. Among them, the power output of photoelectric conversion is 24%, then the power used for photoelectric conversion output is 662.5W, and the remaining 2098W is converted into heat. The initial temperature of the photovoltaic module is 60℃. The simulation shows that the temperature of the photovoltaic module is 50℃ after forced exhaust for 1 minute, and the heat absorbed by the air is 125.88kJ. The air temperature at the inlet is 25℃, the air temperature at the outlet is 35℃, and the temperature difference is 10℃. The required air volume is calculated to be 12.588kg, and the air density is 1.29kg / m 3 , the required air volume is 9.76m 3 Therefore, the air volume requirement for the exhaust device selected for a single photovoltaic module is about 60m 3 / h.

[0069] Take the double-sided slope roof as an example, see the attached Figure 5 The building is 12m long, 8m wide, 5m high, and has a roof inclination angle of 23°. Two rows and 11 columns of photovoltaic modules are arranged vertically on both sides of the roof, with an installed capacity of 12.1kWp, and a total installed capacity of 24.2kWp on both sides. The size of a single photovoltaic module is 1133mm×2256mm.

[0070] Use the following three methods to set up an exhaust device in the middle of the roof ridge, see the attached Figure 6 .

[0071] ① Install an exhaust device in the middle of the roof ridge, with an air volume greater than 2640m 3 / h.

[0072] ② Two exhaust devices are installed in the middle of the roof ridge, and the air volume of each device is greater than 1320m 3 / h.

[0073] ② Four exhaust devices are installed in the middle of the roof ridge, and the air volume of each device is greater than 720m 3 / h.

[0074] The power generation was simulated using PVsyst software, and the simulation results are shown in the table below. It can be calculated that the power generation of each photovoltaic panel is about 1.661kWh per day.

[0075]

[0076]

[0077] The power consumption of a conventional exhaust device is about 0.035 kWh / h. If it works for about 3 hours a day, it will consume about 0.105 kWh / day, which only accounts for about 0.13% of the total power generation of the rooftop photovoltaic module. At the same time, when the working temperature of the photovoltaic module is reduced by 10°C, the power generation will increase by about 4% to 5%, which is much higher than the power consumption of the exhaust device. Therefore, the building material rooftop photovoltaic module with an intelligent heat dissipation system according to the present invention can produce significant economic and social benefits.

[0078] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A building material type roof photovoltaic module with an intelligent heat dissipation system, the building material type roof photovoltaic module is composed of photovoltaic modules, heat collecting panels, heat dissipation channels, waterproof and breathable layers, thermal insulation materials, waterproof vapor barriers, roof panels and other structural layers from top to bottom, the intelligent heat dissipation system is integrated with the photovoltaic modules, heat collecting panels and heat dissipation channels, and includes a temperature sensor, an irradiation monitor, a controller and an air supply / exhaust device.

2. The building material type roof photovoltaic assembly with intelligent heat dissipation system according to claim 1, characterized in that: The temperature sensor in the intelligent heat dissipation system is arranged close to the photovoltaic assembly and is used to monitor the temperature of the photovoltaic assembly; Preferably, the radiation monitor in the intelligent heat dissipation system is arranged on the photovoltaic module to monitor the intensity of solar radiation received by the photovoltaic module; Preferably, the temperature sensor and the radiation monitor are both electrically connected to the controller to transmit temperature signals and radiation intensity signals to the controller; Preferably, the controller is electrically connected to the air supply / exhaust device, and sends a signal to the air supply / exhaust device to control the opening and closing of the air supply / exhaust device.

3. The building material type roof photovoltaic assembly with intelligent heat dissipation system according to claim 1, characterized in that: The photovoltaic module is one of a crystalline silicon module, a cadmium telluride module, a copper indium gallium selenide module or a perovskite module; Preferably, the heat collecting plate is an aluminum plate or a copper plate with a high thermal conductivity; Preferably, the heat dissipation channel is located between the heat collecting plate and the waterproof breathable layer, and the heat dissipation channel is in the form of an equal-height air gap, or the cross-section of the heat dissipation channel is a uniformly arranged triangle, semi-cylinder, rectangle or trapezoid; Preferably, the height of the heat dissipation channel is 5-20 mm, preferably 8-15 mm, more preferably 10 mm; Preferably, the thermal insulation material is an organic or inorganic thermal insulation material having fire resistance that meets the requirements; Preferably, the roof panel is reinforced concrete; Preferably, the waterproof breathable layer and the waterproof vapor barrier layer are respectively a waterproof breathable membrane and a waterproof vapor barrier membrane.

4. A method for controlling the intelligent heat dissipation of a building material-type roof photovoltaic assembly with an intelligent heat dissipation system according to any one of claims 1 to 3, the method comprising: The temperature sensor monitors the temperature of the collector plate, and the irradiance monitor monitors the solar radiation intensity received by the photovoltaic module. Then the temperature sensor and the irradiance monitor transmit the temperature signal and the irradiance intensity signal to the controller respectively. The controller compares the received temperature signal and the irradiance intensity signal with the stored temperature conditions and the irradiance intensity conditions. As long as one of the trigger conditions is met, a signal is sent to the air supply / exhaust device to control the opening or closing of the air supply / exhaust device.

5. The heat dissipation method according to claim 4, characterized in that: The opening conditions of the air supply / exhaust device are: When the irradiation intensity is greater than 1100kWh / m 2 When the air supply / exhaust device is turned on; or When the temperature of the PV module is higher than its nominal operating temperature (45±2℃) for 5 minutes, turn on the air supply / exhaust device; The closing conditions of the air supply / exhaust device are: When the temperature of the PV module is lower than its nominal operating temperature (45±2℃) for 5 minutes, turn off the air supply / exhaust device.

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