Photovoltaic and phase change energy storage coupling method, equipment and medium

Abstract

The invention discloses a photovoltaic and phase change energy storage coupling method and device and a medium. The method comprises the steps that light energy absorbed by a photovoltaic and photo-thermal integrated assembly is converted into direct current electric energy, and first heat energy generated by the photovoltaic and photo-thermal integrated assembly is transmitted to a heat transfer medium to be stored; according to the power utilization request of the building energy terminal, the direct current electric energy is converted into alternating current electric energy through current inversion, and the remaining alternating current electric energy is converted into second heat energy through electric heating; the first heat energy and the second heat energy are subjected to phase change storage through heat exchange, and phase change stored energy is generated; the illumination intensity of the environment of the photovoltaic photo-thermal integrated assembly is obtained, and when the illumination intensity is smaller than a preset illumination threshold value, phase change stored energy serves as energy supply; and when the illumination intensity is greater than a preset illumination threshold value, determining the electric energy generated by the photovoltaic and photo-thermal integrated assembly as energy supply. By constructing a deep coupling architecture of the photovoltaic photo-thermal assembly, the phase change energy storage unit and the building energy terminal, the utilization efficiency and supply and demand balance of energy are improved.

Description

Technical Field

[0001] This application relates to the field of renewable energy utilization, and in particular to a coupling method, device and medium for photovoltaic and phase change energy storage. Background Technology

[0002] With the acceleration of global sustainable development and climate change response, the continuous and efficient use of energy has become the core direction of transformation in the construction industry.

[0003] In existing building energy systems, although photovoltaic power generation can provide some electricity, it is significantly affected by weather and sunlight intensity, and is intermittent and unstable, making it difficult to continuously meet the building's energy needs. Moreover, a large amount of waste heat generated during photovoltaic module power generation is not utilized, leading to increased panel temperature and consequently low energy efficiency.

[0004] In addition, building energy demand varies significantly in time and space, with large fluctuations in heating and cooling demand between day and night and in winter and summer. Photovoltaic energy is mainly produced during the day, making it difficult to support efficient and stable energy supply for buildings, resulting in an imbalance between energy supply and demand. Summary of the Invention

[0005] This application provides a photovoltaic and phase change energy storage coupling method, device and medium to solve the problems of low energy utilization efficiency and supply-demand imbalance in existing building energy systems.

[0006] The embodiments of this application adopt the following technical solutions: On one hand, embodiments of this application provide a photovoltaic and phase change energy storage coupling method, which includes: converting the light energy absorbed by the photovoltaic-thermal integrated module into DC power, and transferring the first heat energy generated by the photovoltaic-thermal integrated module to a heat transfer medium for storage; according to the electricity demand of the building energy terminal, converting the DC power into AC power through current inversion, and converting the remaining AC power into second heat energy through electric heating; performing phase change storage on the first heat energy and the second heat energy through heat exchange to generate phase change energy storage; obtaining the light intensity of the environment of the photovoltaic-thermal integrated module, and when the light intensity is less than a preset light threshold, using the phase change energy storage as energy supply; when the light intensity is greater than the preset light threshold, determining the power generated by the photovoltaic-thermal integrated module as energy supply.

[0007] In one example, the first thermal energy is stored through phase change via heat exchange, specifically by adjusting the water pump flow rate to control the storage ratio of the first thermal energy based on the temperature of the photovoltaic-thermal integrated module's solar panel and the storage state of the phase change energy storage.

[0008] In one example, based on the temperature of the photovoltaic-thermal integrated module's solar panel and the storage status of phase change energy storage, the storage ratio of the first thermal energy is controlled by adjusting the water pump flow rate to perform phase change storage. Specifically, this includes: calculating the difference between the solar panel temperature and a preset temperature threshold; when the solar panel temperature is greater than the preset temperature threshold, increasing the water pump flow rate according to a preset temperature-flow ratio table; and when the phase change energy storage reaches the full load threshold, the phase change energy storage unit issues a warning signal and stops storing thermal energy into the phase change energy storage unit.

[0009] In one example, based on the electricity demand of the building energy terminal, the DC power is converted into AC power through a current inverter, and the remaining AC power is converted into a second type of heat energy through electric heating. Specifically, this includes: determining the power consumption of the building energy terminal based on its electricity demand; calculating the difference between the power generation of the photovoltaic-thermal integrated module and the power consumption of the building energy terminal; when the absolute value of the difference between the power generation and the power consumption is less than or equal to a preset power threshold, increasing the power generation of the photovoltaic-thermal integrated module according to a preset power ratio; and when the absolute value of the difference between the power generation and the power consumption is greater than the preset power threshold, converting the remaining AC power into a second type of heat energy.

[0010] In one example, the method further includes: dividing the phase change energy storage unit into a heating zone and a cooling zone according to the energy storage temperature efficiency; the heating zone uses a phase change material with a phase change temperature of 30-40℃ and a latent heat of ≥180kJ / kg, and the cooling zone uses a phase change material with a phase change temperature of 18-25℃ and a latent heat of ≥150kJ / kg, and the two zones achieve thermal energy isolation storage through independent heat exchange loops.

[0011] In one example, the method also includes: the heat exchange channel on the back of the photovoltaic panel of the photovoltaic-thermal integrated module is connected to the phase change energy storage unit through a preset pipe diameter and sealed interface.

[0012] In one example, the method further includes: the heat transfer medium in the heat exchange channel on the back of the photovoltaic panel of the photovoltaic-thermal integrated module is a 60% aqueous solution of ethylene glycol.

[0013] In one example, the method also includes: monitoring the power generation of the photovoltaic-thermal integrated module, the temperature of the heat transfer medium, and the flow rate of the pipeline; generating a fault type when an anomaly is detected; and sending a corresponding fault repair instruction to the client based on the fault type.

[0014] On the other hand, embodiments of this application provide a photovoltaic and phase change energy storage coupling device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform any of the above-mentioned photovoltaic and phase change energy storage coupling methods.

[0015] On the other hand, embodiments of this application provide a photovoltaic and phase change energy storage coupling non-volatile computer storage medium storing computer-executable instructions that can execute any of the above-mentioned photovoltaic and phase change energy storage coupling methods.

[0016] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects: This application constructs a deeply coupled architecture of photovoltaic (PV) thermal modules, phase change energy storage units, and building energy terminals. A dedicated heat exchange pipeline directly connects the heat output end of the PV thermal modules to the phase change energy storage module, simultaneously achieving the coordinated transmission and distribution of electrical and thermal energy, forming a closed-loop system of power generation, thermal storage, and energy consumption. This solves the spatiotemporal matching problem between PV energy and building energy consumption. Furthermore, the heat exchange channels on the back of the PV panels are filled with an ethylene glycol aqueous solution, which both absorbs heat to reduce the panel temperature and recovers waste heat. This overcomes the limitations of traditional PV modules that only generate electricity while wasting thermal energy. The phase change energy storage module adopts a zoned design, solving the problem that a single phase change material cannot meet the diverse energy needs of buildings, resulting in a significantly higher energy storage density compared to traditional single-temperature zone modules. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, some embodiments of this application will be described in detail below with reference to the accompanying drawings, in which: Figure 1 A schematic flowchart illustrating a photovoltaic and phase change energy storage coupling method provided in an embodiment of this application; Figure 2 This is a schematic diagram of a photovoltaic and phase change energy storage coupling device provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Some embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic flowchart illustrating a photovoltaic and phase change energy storage coupling method provided in an embodiment of this application. This method can be applied to different business areas. Certain input parameters or intermediate results in this process can be manually adjusted to help improve accuracy.

[0021] The analysis method involved in the embodiments of this application can be implemented by a terminal device or a server, and this application does not impose any special limitations on it. For ease of understanding and description, the following embodiments are all described in detail using a controller as an example.

[0022] Based on this Figure 1 The process may include the following steps: S101: Converts the light energy absorbed by the photovoltaic-thermal integrated module into DC power, and transfers the first heat energy generated by the photovoltaic-thermal integrated module to the heat transfer medium for storage.

[0023] In some embodiments of this application, it should be noted in advance that the photovoltaic-thermal integrated module of this application is responsible for absorbing solar energy and converting it into electrical energy and thermal energy.

[0024] The photovoltaic-thermal integrated module of this application integrates a highly efficient heat exchange channel on the back of a traditional photovoltaic panel. The channel is filled with an ethylene glycol aqueous solution, which has excellent heat transfer properties. When sunlight shines on the photovoltaic panel, some of the light energy is converted into electrical energy, and the rest into heat energy, causing the panel temperature to rise. The liquid medium within the heat exchange channel absorbs the heat dissipated by the panel and carries it away, thereby reducing the panel temperature and improving power generation efficiency. Simultaneously, the heated liquid medium can be output as heat energy for building heating or stored in a phase change energy storage module.

[0025] It should also be noted that the heat exchange channel on the back of the photovoltaic panel of the photovoltaic-thermal integrated module is connected to the phase change energy storage unit through a preset pipe diameter and sealed interface.

[0026] It should also be noted that the installation of integrated photovoltaic (PV) and solar thermal (SPTM) modules involves rationally planning the layout of the PV module array based on the building's roof area, orientation, and lighting conditions. The integrated PV and SPTM modules should be installed on the building's roof or facade, ensuring that the modules receive sufficient sunlight. During installation, the module installation instructions must be strictly followed to ensure correct and secure electrical connections between modules and tight, leak-free heat exchange pipe connections. It should also be noted that this application monitors the power generation, heat transfer medium temperature, and pipeline flow rate of the photovoltaic-thermal integrated module in real time. When a system fault occurs, the controller will issue an alarm signal and preliminarily determine the fault type and location through a fault diagnosis program. Maintenance personnel will then promptly conduct on-site troubleshooting and repairs based on the alarm information and fault diagnosis results. For example, if the power generation of the photovoltaic-thermal integrated module abnormally decreases, it may be due to damage to some components, electrical connection faults, or sunlight obstruction. Maintenance personnel need to inspect and replace the damaged components one by one, repair electrical connection problems, and remove sunlight obstructions.

[0027] S102: Based on the electricity demand of the building energy terminal, the DC power is converted into AC power through a current inverter, and the remaining AC power is converted into a second heat energy through electric heating; the remaining AC power is the power remaining after the converted AC power satisfies the electricity demand.

[0028] In some embodiments of this application, when a power consumption request is received from a building energy terminal, the power consumption of the building energy terminal is determined; the power generation of the photovoltaic-thermal integrated module is calculated to differ from the power consumption of the building energy terminal; when the absolute value of the difference between the power generation and the power consumption is less than or equal to a preset power threshold (e.g., 5kW), the power generation of the photovoltaic-thermal integrated module is increased according to a preset power ratio; when the absolute value of the difference between the power generation and the power consumption is greater than the preset power threshold, the remaining AC power is converted into second heat energy.

[0029] It should be noted that the conversion of DC power to AC power is achieved through an energy conversion and control unit, which includes an inverter, controller, heat exchanger, water pump, valves, and other equipment. The inverter converts the DC power generated by the photovoltaic modules into AC power to power electrical equipment within the building, and can store excess energy in batteries or feed it into the grid. The controller monitors parameters in real time, such as the power generation and temperature of the photovoltaic modules, the temperature and energy storage status of the phase change energy storage module, and the energy demand of the building's energy consumption terminals, through sensors. Based on a preset control strategy, it automatically controls the opening and closing of water pumps and valves and adjusts their flow rates, achieving efficient matching and control between the electrical and thermal energy generated by the photovoltaic modules, the thermal energy stored and released by the phase change energy storage module, and the energy consumption terminals of the building.

[0030] It should also be noted that regarding the installation of the energy conversion and control unit, the inverter, controller, heat exchanger, water pump, valves, and other equipment should be installed in a dedicated electrical equipment room or control room. Electrical wiring and equipment connections should be carried out according to the equipment wiring diagram and installation requirements, ensuring that communication lines between devices are correctly connected and control signals are transmitted accurately. S103: The first thermal energy and the second thermal energy are phase-change stored through heat exchange to generate phase-change energy storage.

[0031] In some embodiments of this application, after obtaining the first thermal energy and the second thermal energy, the thermal energy is subjected to phase change storage. For the phase change storage of the first thermal energy, the storage ratio of the first thermal energy is controlled by adjusting the water pump flow rate according to the temperature of the photovoltaic-thermal integrated module and the storage state of the phase change energy storage.

[0032] Specifically, the difference between the solar panel temperature and the preset temperature threshold is calculated. When the solar panel temperature is greater than the preset temperature threshold (usually 25°C), the water pump flow rate is increased according to the preset temperature-flow ratio table (for example, the flow rate increases by 10%-15% for every 5°C increase in temperature). When the phase change energy storage reaches the full load threshold, the phase change energy storage unit issues a warning signal and stops storing heat energy into the phase change energy storage unit.

[0033] It should be noted that each unit of the phase change energy storage unit is filled with a suitable phase change material, such as paraffin wax or fatty acids. The phase change temperature of the phase change material is selected based on the building's heating and cooling needs. For heating scenarios, a phase change material with a phase change temperature of 30℃-40℃ and a latent heat ≥180kJ / kg is selected; for cooling scenarios, a phase change material with a phase change temperature of 18℃-25℃ and a latent heat ≥150kJ / kg is selected. When excess heat energy generated by photovoltaic modules or heat energy converted from off-peak electricity is transferred to the phase change energy storage unit, the phase change material absorbs heat and undergoes a phase change, changing from a solid to a liquid state, storing the heat energy. When the building needs heating or cooling, the phase change material undergoes a reverse phase change, changing from a liquid to a solid state, releasing the stored heat energy, which is then transferred to the circulating medium within the building through a heat exchange device to meet the building's energy needs.

[0034] It should also be noted that regarding the installation of phase change energy storage units (PCS units), they should be installed in suitable locations inside the building, such as basements or equipment rooms, for ease of maintenance and management. A support structure should be designed and constructed based on the number and size of the PCS units, and the PCS units should be neatly arranged and fixed to the support structure. Heat exchange pipes should be connected between the PCS units, ensuring smooth connections. These pipes should also connect the PCS modules to the photovoltaic module array, energy conversion and control unit, and the building's heating and cooling cycle system.

[0035] S104: Obtain the ambient light intensity of the photovoltaic-thermal integrated module environment; when the light intensity is less than a preset light threshold, use the phase change energy storage as the energy supply; when the light intensity is greater than the preset light threshold, determine the electrical energy generated by the photovoltaic-thermal integrated module as the energy supply.

[0036] In some embodiments of this application, the decision to use phase change energy storage as an energy supply is made based on the light intensity of the environment surrounding the photovoltaic-thermal integrated module. Specifically, when the light intensity is less than a preset light threshold, phase change energy storage is used as an energy supply; when the light intensity is greater than the preset light threshold, the electrical energy generated by the photovoltaic-thermal integrated module is determined as the energy supply.

[0037] Furthermore, it should be noted that during periods of ample sunlight, the photovoltaic-thermal integrated modules generate electricity, prioritizing the power needs of electrical equipment within the building. Simultaneously, a portion of the heat generated by the photovoltaic modules is directly used for building heating (such as heating domestic hot water), while the remainder is transferred to the phase change energy storage module for storage. If the building requires cooling, the energy conversion and regulation unit utilizes the cooling capacity of the low-temperature phase change material stored in the phase change energy storage module, in conjunction with the air conditioning system, to provide auxiliary cooling.

[0038] At night or when there is insufficient sunlight, the phase change energy storage module releases the stored heat energy to heat the building's heating circulating water through a heat exchanger to meet the building's heating needs. If the heat energy stored in the phase change energy storage module is insufficient, a backup heat source (such as electric heating equipment, but its use should be minimized to maintain the zero-carbon target) can be activated to supplement it.

[0039] During transitional seasons or periods of low demand, the energy flow between photovoltaic modules, phase change energy storage modules, and energy consumption terminals can be flexibly adjusted according to the building's actual energy needs. For example, in spring and autumn, when building heating and cooling demands are low, the electricity generated by photovoltaic modules is mainly used to meet the building's lighting and small electrical appliance needs. Excess electricity is stored or transmitted to the grid, and the phase change energy storage modules are in a relatively stable energy storage state, only being fine-tuned when there are small fluctuations in building energy demand.

[0040] Finally, it should be noted that after the installation of each part of the system was completed, comprehensive commissioning was carried out. First, the power generation of the photovoltaic module array was checked by monitoring the voltage, current, and power output of the photovoltaic modules through the inverter to ensure normal power generation. Then, the energy storage and release performance of the phase change energy storage module was tested by inputting heat into the phase change energy storage unit, observing the phase change process and temperature changes of the phase change material, and checking the heat transfer effect of the heat exchange pipes. Next, the energy conversion and control unit was commissioned by setting different operating parameters through the controller, testing the start / stop control and flow regulation functions of the water pumps and valves, and verifying whether the system could achieve intelligent control of electrical and thermal energy according to the preset control strategy. Finally, the entire system was jointly commissioned, simulating different weather conditions and building energy demand scenarios to check the stability and reliability of the system, ensuring that the system could operate normally and meet the design requirements.

[0041] Furthermore, this application will regularly clean the photovoltaic-thermal integrated modules to remove surface dust, dirt, and debris, ensuring effective sunlight exposure and improving power generation efficiency. The electrical connections of the photovoltaic modules will be inspected to ensure they are secure and free from loosening or oxidation. The phase change energy storage module will be inspected for leaks or deterioration of the phase change material, and heat exchange pipes will be regularly maintained to prevent blockage and corrosion. Maintenance will be performed on the equipment in the energy conversion and control unit, such as regularly replacing water pump seals and filters, checking the inverter's cooling fan for proper operation, and calibrating the controller's sensors. It should be noted that, although the embodiments in this application are based on... Figure 1 Steps S101 to S104 will be described sequentially, but this does not mean that steps S101 and S104 must be performed in a strict order. The reason this embodiment follows this order is... Figure 1 The order in which steps S101 to S104 are described is provided to facilitate understanding of the technical solutions of the embodiments of this application by those skilled in the art. In other words, in the embodiments of this application, the order of steps S101 to S104 can be appropriately adjusted according to actual needs.

[0042] pass Figure 1 This application constructs a deeply coupled architecture of photovoltaic (PV) thermal modules, phase change energy storage units, and building energy terminals. A dedicated heat exchange pipeline directly connects the heat output end of the PV thermal modules to the phase change energy storage module, simultaneously achieving the coordinated transmission and distribution of electrical and thermal energy, forming a closed-loop system of power generation, thermal storage, and energy consumption. This solves the spatiotemporal matching problem between PV energy and building energy consumption. Furthermore, the heat exchange channels on the back of the PV panels are filled with an ethylene glycol aqueous solution, which both absorbs heat to reduce the panel temperature and recovers waste heat. This overcomes the limitations of traditional PV modules that only generate electricity while wasting thermal energy. The phase change energy storage module adopts a zoned design, solving the problem that a single phase change material cannot meet the diversified energy needs of buildings, resulting in a significantly higher energy storage density compared to traditional single-temperature zone modules.

[0043] Figure 2 A schematic diagram of a photovoltaic and phase change energy storage coupling device provided in this application embodiment includes: At least one processor; and, A memory that is communicatively connected to at least one processor; wherein, A photovoltaic and phase change energy storage coupling method wherein the memory stores instructions that can be executed by at least one processor, the instructions being executed by at least one processor to enable at least one processor to perform any of the above-mentioned methods.

[0044] Some embodiments of this application provide a photovoltaic and phase change energy storage coupling non-volatile computer storage medium storing computer-executable instructions that can execute any of the above-mentioned photovoltaic and phase change energy storage coupling methods.

[0045] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device and medium embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the description of the method embodiments.

[0046] The devices and media provided in this application are one-to-one with the methods. Therefore, the devices and media also have similar beneficial technical effects as their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be repeated here.

[0047] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0048] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0049] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0050] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0051] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0052] Memory may include non-persistent storage in computer-readable media, random access memory (RAM), and non-volatile memory such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0053] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0054] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0055] The above are merely embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the technical principles of this application should fall within the protection scope of this application.

Claims

1. A method for coupling photovoltaic and phase change energy storage, characterized in that, The method includes: The photovoltaic-thermal integrated module converts the light energy absorbed by the photovoltaic-thermal integrated module into DC power, and transfers the first heat energy generated by the photovoltaic-thermal integrated module to the heat transfer medium for storage. According to the electricity demand of the building energy terminal, the DC power is converted into AC power through current inversion, and the remaining AC power is converted into a second heat energy through electric heating; the remaining AC power is the power remaining after the converted AC power meets the electricity demand. Phase change energy storage is generated by performing phase change storage on the first thermal energy and the second thermal energy through heat exchange. The light intensity of the environment of the photovoltaic-thermal integrated module is obtained. When the light intensity is less than a preset light threshold, the phase change energy storage is used as the energy supply; when the light intensity is greater than the preset light threshold, the electrical energy generated by the photovoltaic-thermal integrated module is determined as the energy supply.

2. The method according to claim 1, characterized in that, The first thermal energy is stored through phase change via heat exchange, specifically including: Based on the temperature of the solar panel and the storage status of phase change energy storage in the photovoltaic-thermal integrated module, the storage ratio of the first thermal energy is controlled by adjusting the water pump flow rate to carry out phase change storage.

3. The method according to claim 2, characterized in that, The method of controlling the storage ratio of the first thermal energy by adjusting the water pump flow rate to perform phase change storage based on the temperature of the photovoltaic-thermal integrated module's solar panel and the storage state of phase change energy storage specifically includes: The difference between the solar panel temperature and the preset temperature threshold is calculated. When the solar panel temperature is greater than the preset temperature threshold, the water pump flow rate is increased according to the preset temperature flow rate ratio table. When the energy storage capacity of the phase change energy storage reaches the full load threshold, the phase change energy storage unit issues a warning signal and stops storing thermal energy into the phase change energy storage unit.

4. The method according to claim 1, characterized in that, The process of converting DC power into AC power via a current inverter based on the building energy terminal's power demand, and then converting the remaining AC power into a second type of heat energy via electric heating, specifically includes: Determine the power consumption of the building energy terminal based on its power demand; The difference between the power generation of the photovoltaic-thermal integrated module and the power consumption of the building energy terminal is calculated. When the absolute value of the difference between the power generation and the power consumption is less than or equal to the preset power threshold, the power generation of the photovoltaic-thermal integrated module is increased according to the preset power ratio. When the absolute value of the difference between the generated power and the consumed power is greater than the preset power threshold, the remaining AC power is converted into secondary heat energy.

5. The method according to claim 1, characterized in that, The method further includes: Based on the energy storage temperature efficiency, the phase change energy storage unit is divided into a heating temperature zone and a cooling temperature zone. The heating temperature zone uses a phase change material with a phase change temperature of 30-40℃ and a latent heat of ≥180kJ / kg, while the cooling temperature zone uses a phase change material with a phase change temperature of 18-25℃ and a latent heat of ≥150kJ / kg. The two temperature zones achieve thermal energy isolation storage through independent heat exchange loops.

6. The method according to claim 1, characterized in that, The method further includes: The photovoltaic and solar thermal integrated module's photovoltaic panel back heat exchange channel and phase change energy storage unit are connected through a preset pipe diameter and sealed interface.

7. The method according to claim 6, characterized in that, The method further includes: The heat transfer medium in the heat exchange channel on the back of the photovoltaic panel of the photovoltaic-thermal integrated module is a 60% ethylene glycol aqueous solution.

8. The method according to claim 1, characterized in that, The method further includes: Monitor the power generation, heat transfer medium temperature, and pipeline flow of the photovoltaic-thermal integrated module, and generate a fault type when an anomaly is detected; Based on the fault type, send the corresponding fault repair command to the client.

9. A photovoltaic and phase change energy storage coupling device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform a photovoltaic and phase change energy storage coupling method according to any one of claims 1-8.

10. A photovoltaic and phase change energy storage coupled storage medium, storing computer-executable instructions, characterized in that, The computer-executable instructions are capable of executing the photovoltaic and phase change energy storage coupling method described in any one of claims 1-8.

Images