Control method of photovoltaic curtain wall and photovoltaic curtain wall

Abstract

The invention provides a photovoltaic curtain wall control method and a photovoltaic curtain wall. The photovoltaic curtain wall comprises an outer-layer curtain wall body, an inner-layer curtain wall body and a photovoltaic assembly arranged on the outer-layer curtain wall body, an air cavity is formed between the outer-layer curtain wall body and the inner-layer curtain wall body, and shutters are arranged on the outer-layer curtain wall body and the inner-layer curtain wall body respectively. The control method of the photovoltaic curtain wall comprises the following steps: acquiring temperature data of the photovoltaic curtain wall and operating parameters of a photovoltaic module; and according to the temperature data and the operation parameters, the operation mode of the photovoltaic curtain wall is determined, wherein the operation mode comprises a refrigeration mode and a heating mode. In summer, the photovoltaic curtain wall can operate in a refrigeration mode to keep the indoor cool; in winter, the photovoltaic curtain wall can operate in a heating mode, and warm air in the air cavity and heat generated by operation of the photovoltaic module are fully utilized to keep the indoor warm. According to the control method of the photovoltaic curtain wall, energy can be saved, and the seasonal adaptability of the photovoltaic curtain wall can be improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic curtain wall technology, and in particular to a control method for a photovoltaic curtain wall and a photovoltaic curtain wall itself. Background Technology

[0002] Under the general trend of sustainable development in the construction industry, building-integrated photovoltaics (BIPV) technology has been widely applied to building roofs, exterior walls, and other areas with low visibility requirements, becoming an important component of green building energy supply. Among them, photovoltaic window systems, which combine good visibility with high power generation efficiency, are gradually becoming a key focus of industry research and application because they can meet the dual needs of building appearance and energy output.

[0003] Existing photovoltaic (PV) curtain walls primarily achieve ventilation by incorporating operable windows and folding windows, allowing fresh air from outside to enter the room, focusing on ventilation and heat dissipation through external air circulation in summer. However, this type of technology still has several limitations.

[0004] On the one hand, traditional photovoltaic curtain walls lack intelligent control mechanisms and cannot dynamically adjust the airflow channel status according to environmental parameters. This directly leads to insufficient heat dissipation efficiency of photovoltaic modules in summer, and the increase in battery temperature causes a decrease in photoelectric conversion efficiency; in winter, due to insufficient heat recovery, a large amount of heat energy is lost through the curtain wall, which not only wastes energy but also weakens the building's thermal insulation effect, seriously restricting the seasonal adaptability and overall energy efficiency improvement of photovoltaic curtain walls.

[0005] On the other hand, the louvers on existing photovoltaic curtain walls can only achieve simple opening or closing operations, with a single adjustment method. They cannot dynamically adjust the opening and angle according to indoor temperature requirements, solar radiation intensity, etc., making it difficult to meet users' needs for refined and diversified control of indoor temperature. Summary of the Invention

[0006] One object of the present invention is to overcome at least one deficiency in the prior art and to provide a control method for a photovoltaic curtain wall and a photovoltaic curtain wall.

[0007] A further object of the present invention is to automatically adjust the airflow channel state to improve the seasonal adaptability of the photovoltaic curtain wall.

[0008] Another further objective of this invention is to optimize the louver angle of the blinds to meet users' needs for refined and diversified control of indoor temperature.

[0009] Specifically, the present invention provides a control method for a photovoltaic curtain wall, the photovoltaic curtain wall comprising an outer curtain wall, an inner curtain wall, and photovoltaic modules arranged on the outer curtain wall, an air cavity forming between the outer curtain wall and the inner curtain wall, and louvers respectively provided on the outer curtain wall and the inner curtain wall, characterized by comprising: Acquire temperature data of the photovoltaic curtain wall and operating parameters of the photovoltaic modules. Temperature data includes outdoor temperature, indoor temperature and air cavity temperature. Operating parameters of the photovoltaic modules include operating temperature and output power. The operating mode of the photovoltaic curtain wall is determined based on temperature data and operating parameters. The operating modes include cooling mode and heating mode. In cooling mode, the photovoltaic curtain wall is configured to close the louvers on the inner curtain wall, open the louvers on the outer curtain wall and dynamically adjust the opening degree, and achieve air exchange with the outside through the thermal pressure effect of the air cavity. In heating mode, the photovoltaic curtain wall is configured to open the louvers on the inner curtain wall and dynamically adjust their opening, while closing the louvers on the outer curtain wall, thereby achieving air exchange with the room through the thermal pressure effect of the air cavity.

[0010] Optionally, the calculation formula for the operating mode of the photovoltaic curtain wall, based on the outdoor temperature, air cavity temperature, and photovoltaic module operating parameters, is as follows: ; Where M represents the operating mode, Here, To is the function for determining the operating mode, Ti is the outdoor temperature, Tcavity is the air cavity temperature, Tpv is the operating temperature of the photovoltaic module, and Ppv is the operating power of the photovoltaic module. This is a preset duration threshold.

[0011] Optionally, after calculating the operating mode of the photovoltaic curtain wall based on the outdoor temperature, air cavity temperature, and photovoltaic module operating parameters, the process further includes: Obtain outdoor environmental parameters outside the outer curtain wall, including outdoor relative humidity, solar irradiance, outdoor wind speed, and outdoor air quality parameters. Adjust the louver angle according to the operating mode and outdoor environmental parameters; among which... The louver angle includes the louver angle of the louvers opened on the inner curtain wall or the louver angle of the louvers opened on the outer curtain wall.

[0012] Optionally, the formula for adjusting the louver angle based on the operating mode, outdoor relative humidity, solar irradiance, and outdoor air quality parameters is as follows: ; in, To adjust the angle of the louvers in cooling mode, To adjust the louver angle in heating mode, M is the operating mode, f_s is the louver angle adjustment function in cooling mode, f_w is the louver angle adjustment function in heating mode, To is the outdoor temperature, Ti is the indoor temperature, Tcavity is the air cavity temperature, Rho is the outdoor relative humidity, Is is the solar irradiance, Vw is the outdoor wind speed, and t is the time step. In cooling mode, M=1; in heating mode, M=0.

[0013] Optionally, after adjusting the louver angle according to the operating mode, outdoor relative humidity, solar irradiance, outdoor wind speed, and outdoor air quality parameters, the following steps may also be included: Airflow simulation models are used to predict changes in air velocity and pressure within an air cavity; The effective ventilation area of ​​the louvers is calculated based on the changes in air velocity and air pressure within the air cavity. Adjust the louver angle according to the effective ventilation area.

[0014] Optionally, the formula for the airflow simulation model is: ; Where u_i and u_j are velocity components, and x_i and x_j are spatial coordinates. Where p is the air density and p is the pressure. The molecular viscosity coefficient, The turbulent viscosity coefficient, , Let k be the pulse velocity component and k be the turbulent kinetic energy. Let G_k be the turbulent energy dissipation rate, G_b be the turbulent kinetic energy generated by the average velocity gradient, and Y_M be the compressibility correction term. , A dimensionless parameter in turbulent flow that indicates the relationship between boundary temperature and flow boundary layer. , , This is an empirical constant.

[0015] According to another aspect of the present invention, a photovoltaic curtain wall is also provided, comprising: The inner curtain wall is located on the inside of the photovoltaic curtain wall; The outer curtain wall is spaced out on the outside of the inner curtain wall and is used to absorb and transmit solar radiation; An air cavity is set between the inner and outer curtain walls to form a sealed interlayer to isolate the outdoor environment from the indoor environment. Photovoltaic modules are installed in the inner curtain wall, and the heat generated by the photovoltaic modules during operation is introduced into the air cavity; Louvers are installed on both the inner and outer curtain walls; among them, The louvers on the inner curtain wall are used to open or separate the air chamber from the interior space; The louvers on the outer curtain wall are used to open or separate the air chamber from the outdoor space; The control device includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the control method for the photovoltaic curtain wall according to any of the above.

[0016] Optionally, the blinds include: The first louver of the inner curtain wall is located in the upper area of ​​the inner curtain wall; The second louver of the inner curtain wall is located in the lower area of ​​the inner curtain wall; The first and second louvers of the inner curtain wall are configured as follows: In heating mode, air in the air cavity flows into the indoor space through the first louver of the inner curtain wall, and air in the indoor space flows into the air cavity through the second louver of the inner curtain wall.

[0017] Optionally, the photovoltaic curtain wall also includes: The hose, one end of which is connected to the first louver of the inner curtain wall, is used to guide the air flowing through the first louver of the inner curtain wall into the interior space. A fan, connected to the other end of a hose, is used to draw air from inside the hose into the indoor space.

[0018] Optionally, the blinds include: The first louver of the outer curtain wall is located in the upper area of ​​the outer curtain wall; The second louver of the outer curtain wall is located in the lower area of ​​the outer curtain wall; The first and second louvers of the outer curtain wall are configured as follows: In cooling mode, air in the air cavity flows into the outdoor space through the second louver of the outer curtain wall, and air in the outdoor space flows into the air cavity through the first louver of the outer curtain wall.

[0019] The photovoltaic (PV) curtain wall control method provided by this invention determines the operating mode of the PV curtain wall based on its temperature data and the operating parameters of the PV modules. In summer, the PV curtain wall can operate in cooling mode to keep the interior cool; in winter, it can operate in heating mode, fully utilizing the warm air within the air chamber and the heat generated by the PV modules to keep the interior warm. This control method for PV curtain walls not only saves energy but also improves the seasonal adaptability of the PV curtain wall.

[0020] Furthermore, the control method for photovoltaic curtain walls provided by this invention can adjust the louver angle of the louvers according to the operating mode of the photovoltaic curtain wall and outdoor environmental parameters. Dynamically adjusting the opening and angle of the louvers can meet users' needs for precise and diversified control of indoor temperature.

[0021] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0022] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic flowchart of a control method for a photovoltaic curtain wall according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating a control method for a photovoltaic curtain wall according to another embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the operating principle in a cooling mode according to an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the operating principle in heating mode according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the right-side structure of a photovoltaic curtain wall according to an embodiment of the present invention; Figure 6 This is a connection diagram of a control device according to an embodiment of the present invention; Figure 7 This is a top view of a photovoltaic curtain wall according to an embodiment of the present invention. Detailed Implementation

[0023] This invention provides a photovoltaic curtain wall 10, such as Figure 5 and Figure 6As shown, the photovoltaic curtain wall 10 includes: an inner curtain wall 100 disposed on the inner side of the photovoltaic curtain wall 10; an outer curtain wall 200 disposed at intervals on the outer side of the inner curtain wall 100 for absorbing and transmitting solar radiation; an air cavity 300 disposed between the inner curtain wall 100 and the outer curtain wall 200 for forming a sealed layer to isolate the outdoor environment from the indoor environment; photovoltaic modules 210 disposed on the inner curtain wall 100, and the heat generated by the photovoltaic modules 210 during operation is introduced into the air cavity 300; and louvers disposed on the inner curtain wall 100 and the outer curtain wall 200, respectively. The louvers on the inner curtain wall 100 are used to open or separate the air cavity 300 from the indoor space. The louvers on the outer curtain wall 200 are used to open or separate the air cavity 300 from the outdoor space. A control device includes a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the steps of the control method for the photovoltaic curtain wall 10 of any of the above embodiments.

[0024] In some optional embodiments, the louvers include: a first louver 410 of the inner curtain wall, disposed in the upper region of the inner curtain wall 100; and a second louver 420 of the inner curtain wall, disposed in the lower region of the inner curtain wall 100. The first and second louvers are configured such that, in heating mode, air within the air cavity 300 flows into the indoor space through the first louver 410, and air within the indoor space flows into the air cavity 300 through the second louver 420. In heating mode, waste heat emitted by the photovoltaic modules 210 accumulates in the air cavity 300, forming a high-temperature airflow. Through the partitioned design of the upper first louver of the inner curtain wall 100 for air intake and the lower second louver for air return, the high-temperature waste heat airflow within the air cavity 300 naturally rises and efficiently flows into the room through the upper first louver, meeting the heating needs of the upper indoor space. The low-temperature indoor air sinks due to gravity and flows back into the air cavity 300 through the second 100 louvers at the bottom. There, it exchanges heat with the waste heat from the photovoltaic system and the high-temperature environment of the air cavity 300, forming a closed-loop heat cycle. In this invention, the photovoltaic curtain wall 10 significantly improves the waste heat utilization rate, which can accelerate the rate of indoor temperature increase and reduce heating energy consumption.

[0025] In some optional embodiments, the photovoltaic curtain wall 10 further includes: a flexible hose 220, one end of which is connected to the first louver 410 of the inner curtain wall, for guiding air flowing through the first louver 410 into the indoor space; and a fan 230, connected to the other end of the flexible hose 220, for drawing air from the flexible hose 220 into the indoor space. In heating mode, the photovoltaic waste heat airflow in the air cavity 300 enters the flexible hose 220 through the first louver 410 of the inner curtain wall, and the fan 230 draws air from the air cavity 300 to form a directional airflow channel, which can accurately deliver high-temperature waste heat to the room, breaking the limitations of uneven waste heat diffusion under natural heat circulation. In this invention, the photovoltaic curtain wall 10 can improve the targeting of heating and avoid the problems of insufficient waste heat and poor heating effect in some indoor areas.

[0026] In some optional embodiments, the louvers include: a first louver 430 of the outer curtain wall, disposed in the upper region of the outer curtain wall 200; and a second louver 440 of the outer curtain wall, disposed in the lower region of the outer curtain wall 200. The first louver 430 and the second louver 440 of the outer curtain wall are configured such that, in cooling mode, air within the air cavity 300 flows into the outdoor space through the second louver 440, and air within the outdoor space flows into the air cavity 300 through the first louver 430.

[0027] In some alternative embodiments, such as Figure 7 As shown, the outer curtain wall 200 includes: male columns 240 and female columns 250. The male and female columns 240 and 250 can be connected by a plug-in joint, forming a three-layer sealing structure. A first layer of dust-tight sealant, consisting of double-layer waterproof strips, is installed between adjacent male and female columns. A second layer of water-tight sealant, also a waterproof strip, is installed. A third layer of air-tight sealant, also a waterproof strip, is installed. Weather-resistant silicone sealant and foam strips are installed on the outer side to enhance the seal. Thermal bridges are installed at the joints to effectively block heat conduction and improve the overall thermal performance of the curtain wall.

[0028] The inner curtain wall 100 includes: an inner curtain wall male column 110 and an inner curtain wall female column 120. The inner curtain wall male column 110 and inner curtain wall female column 120 can also be connected by a plug-in connection. The inner curtain wall male column 110 and inner curtain wall female column 120 can be made of fluorocarbon coated profiles. Fluorocarbon coating can effectively improve the rigidity of the inner curtain wall male column 110 and inner curtain wall female column 120 and extend their service life. Fireproof rock wool can be installed on the side of the inner curtain wall male column 110 and inner curtain wall female column 120 that is close to the air cavity 300 to ensure the safety of the photovoltaic curtain wall 10.

[0029] This invention also provides a control method for a photovoltaic curtain wall, used to control the photovoltaic curtain wall. For example... Figure 1As shown, the control method for the photovoltaic curtain wall includes at least the following steps S101 to S102.

[0030] Step S101: Obtain the temperature data of the photovoltaic curtain wall and the operating parameters of the photovoltaic modules.

[0031] Step S102: Determine the operating mode of the photovoltaic curtain wall based on temperature data and operating parameters.

[0032] The temperature data includes outdoor temperature, indoor temperature, and air cavity temperature. The operating parameters of the photovoltaic module include operating temperature and output power.

[0033] Operating modes include cooling mode and heating mode. For example... Figure 3 and Figure 4 As shown, in cooling mode, the photovoltaic curtain wall is configured to close the louvers on the inner curtain wall and open the louvers on the outer curtain wall, dynamically adjusting their opening degree. Air exchange with the outside is achieved through the thermal pressure effect of the air cavity. In heating mode, the photovoltaic curtain wall is configured to open the louvers on the inner curtain wall and dynamically adjust their opening degree, while closing the louvers on the outer curtain wall. Air exchange with the indoor environment is achieved through the thermal pressure effect of the air cavity.

[0034] By determining the operating mode of the photovoltaic curtain wall based on outdoor temperature, indoor temperature, air cavity temperature, and photovoltaic module operating parameters, the seasonal adaptability of the photovoltaic curtain wall can be improved. In cooling mode, closing the louvers on the inner curtain wall and opening the louvers on the outer curtain wall allows the heat inside the air cavity to be expelled to the outside and cooler air to be introduced into the air cavity using the thermal pressure effect of the air cavity.

[0035] In heating mode, opening the louvers on the inner curtain wall and closing the louvers on the outer curtain wall allows heat from the air cavity and the photovoltaic modules to be transferred into the room through the thermal pressure effect of the air cavity, while also introducing cooler indoor air into the air cavity. This fully utilizes the waste heat from the photovoltaic modules and the heat within the air cavity, reducing indoor heating energy consumption and improving energy efficiency.

[0036] In some optional embodiments, the calculation formula for the operating mode of the photovoltaic curtain wall, based on the outdoor temperature, air cavity temperature, and photovoltaic module operating parameters, is as follows: ; Where M represents the operating mode, Here, To is the function for determining the operating mode, Ti is the outdoor temperature, Tcavity is the air cavity temperature, Tpv is the operating temperature of the photovoltaic module, and Ppv is the operating power of the photovoltaic module. This is a preset duration threshold.

[0037] The operation mode determination function can be implemented by setting a preset threshold for each parameter. For example, the operation mode determination function can be: ; in, This indicates a logical AND condition, meaning that triggering both cooling and heating modes requires meeting all parallel conditions, where Pn is the rated output power of the photovoltaic module. The above formula can be interpreted as: The system operates in cooling mode when the outdoor temperature exceeds 28℃, the photovoltaic module temperature exceeds 30℃, the air cavity temperature exceeds 25℃, the duration exceeds 24 hours, and the real-time output power of the photovoltaic module exceeds 30% of the rated power. The system operates in heating mode when the outdoor temperature is below 15℃, the photovoltaic module temperature is below 20℃, the air cavity temperature is below 18℃, the duration exceeds 24 hours, and the real-time output power of the photovoltaic module exceeds 30% of the rated power.

[0038] In other cases, such as when the temperature conditions do not meet the requirements for either cooling or heating mode, the current operating mode should be maintained without change to avoid frequent mode switching and ensure the stability of the photovoltaic curtain wall operation.

[0039] The above method of determining the operating mode is merely an example. Those skilled in the art can choose other preset thresholds based on the actual application environment, or select an appropriate operating mode determination function based on the actual usage situation.

[0040] In some alternative embodiments, such as Figure 2 As shown, after the step of calculating the operating mode of the photovoltaic curtain wall based on the outdoor temperature, air cavity temperature and photovoltaic module operating parameters, at least the following steps S201 to S207 are also included.

[0041] Step S201: Obtain the temperature data of the photovoltaic curtain wall and the operating parameters of the photovoltaic modules.

[0042] Step S202: Determine the operating mode of the photovoltaic curtain wall based on temperature data and operating parameters.

[0043] Step S203: Obtain outdoor environmental parameters outside the outer curtain wall. These parameters include outdoor relative humidity, solar irradiance, outdoor wind speed, and outdoor air quality. These key environmental parameters provide an accurate and comprehensive data basis for adjusting the louver angle.

[0044] Step S204: Adjust the louver angle according to the operating mode and outdoor environmental parameters. The louver angle includes the angle of the louvers on the inner curtain wall or the angle of the louvers on the outer curtain wall. The louver angle can be dynamically adjusted according to the operating mode and outdoor environmental parameters, giving users multiple options for controlling indoor temperature. For example, adjusting the louver angle in cooling mode in conjunction with solar irradiance can enhance the shading effect. Furthermore, adjusting the louver angles on both the inner and outer curtain walls separately can improve indoor environmental comfort and meet users' needs for precise and diverse control of indoor temperature.

[0045] Step S205 involves using an airflow simulation model to predict changes in air velocity and pressure within the air cavity. Predicting these changes through the airflow simulation model allows for advance understanding of the airflow conditions inside the air cavity, preventing potential airflow turbulence issues caused by blindly adjusting the louvers. Furthermore, predicting air velocity and pressure changes within the air cavity through the airflow simulation model provides a data foundation for subsequent calculations of the effective ventilation area.

[0046] Step S206: Calculate the effective ventilation area of ​​the louvers based on changes in air velocity and pressure within the air cavity. Converting the airflow state into a quantifiable ventilation area avoids relying on experience to adjust the opening. By calculating the effective ventilation area, the specific target for the louver opening can be clearly defined, ensuring that the ventilation effect meets heat exchange requirements without causing energy waste due to over-ventilation, thus balancing ventilation efficiency and energy consumption.

[0047] Step S207: Adjust the louver angle according to the effective ventilation area. Adjusting the louver angle by adjusting the effective ventilation area can correct any deviations that may exist in step S204, ensuring that the louver angle matches the actual ventilation requirements. This not only guarantees the heat exchange efficiency of the air cavity but also avoids problems such as backflow of air or excessive noise caused by improper angles, thereby improving the system control accuracy and operational stability.

[0048] In some optional embodiments, the formula for adjusting the louver angle based on the operating mode, outdoor relative humidity, solar irradiance, and outdoor air quality parameters is as follows: ; in, To adjust the angle of the louvers in cooling mode, To adjust the louver angle in heating mode, M represents the operating mode, f_s is the louver angle adjustment function in cooling mode, f_w is the louver angle adjustment function in heating mode, To is the outdoor temperature, Ti is the indoor temperature, Tcavity is the air cavity temperature, Rho is the outdoor relative humidity, Is is the solar irradiance, Vw is the outdoor wind speed, and t is the time step. In cooling mode, M=1, and in heating mode, M=0.

[0049] In some optional embodiments, the louver angle adjustment function in heating mode can be: ; In heating mode, the base angle value is set to 75°, and then dynamically adjusted using various parameter correction options. Considering that insufficient shading may occur when the louver angle is below 30°, and ventilation efficiency may be affected when the louver angle is above 75°, the louver angle can be limited to between 30° and 50° to balance shading and ventilation efficiency.

[0050] Where I_Is is the solar irradiance coefficient, Is≥1000W / m 2 When I_Is=1, 500W / m 2 <Is<1000W / m 2 When I_Is=0.5, Is≤500W / m 2 When the outdoor temperature is above 28℃ and the irradiance is strong, the angle decreases by 0.8° for every 1℃ increase in temperature to balance shading and ventilation. I_Tcavity is the cavity temperature coefficient: I_Tcavity = 1 when Tcavity ≥ 28℃, I_Tcavity = 0.4 when 25℃ < Tcavity < 28℃, and I_Tcavity = 0 when Tcavity ≤ 25℃. When the cavity temperature is too high, the angle can be further reduced to enhance heat dissipation. I_light is the light demand coefficient: I_light = 1 when indoor light intensity < 300 lux, I_light = 0.3 when 300 lux ≤ indoor light intensity ≤ 800 lux, and I_light = 0 when indoor light intensity > 800 lux. When the irradiance is weak and indoor light is insufficient, the angle is increased by 0~0.3° to supplement lighting. For every 1m / s increase in wind speed Vw, the angle decreases by 0.2° to reduce wind resistance and avoid airflow turbulence. For every 10% increase in outdoor relative humidity (RHo), the angle should be increased by 0.1° to appropriately reduce ventilation volume and prevent high humidity airflow from entering the room.

[0051] In some optional embodiments, the louver angle adjustment function in cooling mode can be: ; In cooling mode, the base angle value is set to 10°, and then dynamically adjusted using various parameter correction options. Considering that dust easily accumulates when the louver angle is below 5°, and that an angle above 40° would affect the indoor temperature's reception of radiation.

[0052] Where I_Tpv is the photovoltaic temperature coefficient, I_Tpv=1 when Tpv≤20℃, I_Tpv=0.3 when 20℃<Tpv<25℃, and I_Tpv=0 when Tpv≥25℃. When the photovoltaic module temperature is below 20℃, the angle is increased by 1.2° for every 1℃ decrease to enhance the heat absorption capacity of the photovoltaic curtain wall. I_solar is the irradiance coefficient, Is≥800W / m 2 When I_solar=1, 300W / m 2 <Is<800W / m 2 When I_solar=0.6, Is≤300W / m 2 When I_solar = 0, the angle increases by 0~0.6° when irradiance is strong to fully utilize solar radiation. I_Ti is the indoor temperature coefficient: I_Ti = 1 when Ti ≥ 22℃, I_Ti = 0.4 when 20℃ < Ti < 22℃, and I_Ti = 0 when Ti ≤ 20℃. When the indoor temperature is too high, the angle decreases by 0~0.4° to avoid excessive heat absorption. For every 1m / s increase in wind speed Vw, the angle decreases by 0.3° to reduce heat loss. For every 0.1 increase in outdoor air quality AQIo, the angle decreases by 0.2° to weaken ventilation and prevent polluted air from entering the room.

[0053] The formulas for adjusting the louver angle in heating mode and cooling mode are merely examples. Those skilled in the art can select appropriate functions based on actual application conditions to adjust the louver angle and meet users' needs for precise and diversified control of indoor temperature.

[0054] In some optional embodiments, the formula for the airflow simulation model is: ; Where u_i and u_j are velocity components, and x_i and x_j are spatial coordinates. Where p is the air density and p is the pressure. The molecular viscosity coefficient, The turbulent viscosity coefficient, , Let k be the pulse velocity component and k be the turbulent kinetic energy. Let G_k be the turbulent energy dissipation rate, G_b be the turbulent kinetic energy generated by the average velocity gradient, and Y_M be the compressibility correction term. , A dimensionless parameter in turbulent flow that indicates the relationship between boundary temperature and flow boundary layer. , , These are empirical constants. In the actual structure of the air cavity of the photovoltaic curtain wall, a three-dimensional rectangular coordinate system can be used to define spatial coordinates x_i and x_j. i and j are taken as 1, 2, and 3, respectively, corresponding to the three coordinate axes x1, x2, and x3. A right-handed rectangular coordinate system is established with the lower left corner of the outer layer of the curtain wall as the origin O(0,0,0); where the x1 axis is along the horizontal direction of the curtain wall, the x2 axis is along the vertical direction of the curtain wall, and the x3 axis is along the thickness direction of the curtain wall.

[0055] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

[0056] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] Unless otherwise specified, all terms used in the description of this disclosure (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0058] In the description of this disclosure, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

Claims

1. A control method for a photovoltaic curtain wall, the photovoltaic curtain wall comprising an outer curtain wall, an inner curtain wall, and photovoltaic modules arranged on the outer curtain wall, an air cavity forming between the outer curtain wall and the inner curtain wall, and louvers respectively provided on the outer curtain wall and the inner curtain wall, characterized in that... include: The temperature data of the photovoltaic curtain wall and the operating parameters of the photovoltaic modules are obtained. The temperature data includes outdoor temperature, indoor temperature and air cavity temperature. The operating parameters of the photovoltaic modules include operating temperature and output power. The operating mode of the photovoltaic curtain wall is determined based on the temperature data and the operating parameters. The operating mode includes a cooling mode and a heating mode. In the cooling mode, the photovoltaic curtain wall is configured to close the louvers on the inner curtain wall, open the louvers on the outer curtain wall and dynamically adjust the opening degree, and achieve air exchange with the outside through the thermal pressure effect of the air cavity; In the heating mode, the photovoltaic curtain wall is configured to open the louvers on the inner curtain wall and dynamically adjust their opening, and close the louvers on the outer curtain wall, thereby achieving air exchange with the room through the thermal pressure effect of the air cavity.

2. The control method for a photovoltaic curtain wall according to claim 1, characterized in that, The calculation formula for determining the operating mode of the photovoltaic curtain wall based on the outdoor temperature, the air cavity temperature, and the photovoltaic module operating parameters is as follows: ； Where M represents the operating mode, Here, To is the operating mode determination function, Ti is the indoor temperature, Tcavity is the air cavity temperature, Tpv is the operating temperature of the photovoltaic module, and Ppv is the operating power of the photovoltaic module. This is a preset duration threshold.

3. The control method for a photovoltaic curtain wall according to claim 2, characterized in that, After the step of calculating the operating mode of the photovoltaic curtain wall based on the outdoor temperature, the air cavity temperature, and the photovoltaic module operating parameters, the method further includes: Obtain outdoor environmental parameters outside the outer curtain wall, including: outdoor relative humidity, solar irradiance, outdoor wind speed, and outdoor air quality parameters; The louver angle is adjusted according to the operating mode and the outdoor environmental parameters; wherein... The louver angle includes: the louver angle of the louver window opened on the inner curtain wall or the louver angle of the louver window opened on the outer curtain wall.

4. The control method for a photovoltaic curtain wall according to claim 3, characterized in that, The formula for adjusting the louver angle based on the operating mode, outdoor relative humidity, solar irradiance, and outdoor air quality parameters is as follows: ； in, Adjust the angle of the louvers in the cooling mode. In the heating mode, the angle of the louvers is adjusted, M is the operating mode, f_s is the louver angle adjustment function in the cooling mode, f_w is the louver angle adjustment function in the heating mode, To is the outdoor temperature, Ti is the indoor temperature, Tcavity is the air cavity temperature, Rho is the outdoor relative humidity, Is is the solar irradiance, Vw is the outdoor wind speed, and t is the time step. In the cooling mode, M=1, and in the heating mode, M=0.

5. The control method for a photovoltaic curtain wall according to claim 3, characterized in that, Following the step of adjusting the louver angle according to the operating mode, outdoor relative humidity, solar irradiance, outdoor wind speed, and outdoor air quality parameters, the method further includes: The airflow simulation model is used to predict the changes in air velocity and air pressure within the air cavity; The effective ventilation area of ​​the louvers is calculated based on the air velocity and air pressure changes within the air cavity. Adjust the louver angle according to the effective ventilation area.

6. The control method for a photovoltaic curtain wall according to claim 5, characterized in that, The formula for the airflow simulation model is: ； Where u_i and u_j are velocity components, and x_i and x_j are spatial coordinates. Where p is the air density and p is the pressure. The molecular viscosity coefficient, The turbulent viscosity coefficient, , Let k be the pulse velocity component and k be the turbulent kinetic energy. Let G_k be the turbulent energy dissipation rate, G_b be the turbulent kinetic energy generated by the average velocity gradient, and Y_M be the compressibility correction term. , A dimensionless parameter in turbulent flow that indicates the relationship between boundary temperature and flow boundary layer. , , This is an empirical constant.

7. A photovoltaic curtain wall, characterized in that, include: The inner curtain wall is located on the inner side of the photovoltaic curtain wall; The outer curtain wall is spaced apart on the outside of the inner curtain wall and is used to absorb and transmit solar radiation; An air cavity is provided between the inner curtain wall and the outer curtain wall to form a sealed interlayer to isolate the outdoor environment from the indoor environment. A photovoltaic module is installed in the inner curtain wall, and the heat generated by the photovoltaic module during operation is introduced into the air cavity; Louvers are respectively installed on the inner curtain wall and the outer curtain wall; wherein, The louvers on the inner curtain wall are used to open or separate the air cavity from the indoor space; The louvers on the outer curtain wall are used to open or separate the air cavity from the outdoor space; A control device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that the processor executes the computer program to implement the steps of the control method for the photovoltaic curtain wall according to any one of claims 1 to 6.

8. The photovoltaic curtain wall according to claim 7, characterized in that, The louvers include: The first louver of the inner curtain wall is located in the upper area of ​​the inner curtain wall; The second louver of the inner curtain wall is located in the lower area of ​​the inner curtain wall; The first and second louvers of the inner curtain wall are configured as follows: In the heating mode, air in the air cavity flows into the indoor space through the first louver of the inner curtain wall, and air in the indoor space flows into the air cavity through the second louver of the inner curtain wall.

9. The photovoltaic curtain wall according to claim 7, characterized in that, Also includes: A flexible hose, one end of which is connected to the first louver of the inner curtain wall, for guiding the air flowing through the first louver of the inner curtain wall into the indoor space; A fan, connected to the other end of the hose, is used to draw air from the hose into the indoor space.

10. The photovoltaic curtain wall according to claim 7, characterized in that, The louvers include: The first louver of the outer curtain wall is located in the upper area of ​​the outer curtain wall; The second louver of the outer curtain wall is located in the lower area of ​​the outer curtain wall; The first louver and the second louver of the outer curtain wall are configured as follows: In the cooling mode, air in the air cavity flows into the outdoor space through the second louver of the outer curtain wall, and air in the outdoor space flows into the air cavity through the first louver of the outer curtain wall.

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