A device for coupling photovoltaic utilization with a heating network and a method of using the same

Abstract

The application discloses a device for coupling and utilizing heat supply pipe networks and photovoltaics and a use method thereof, and belongs to the research field of coupling and utilization of heat supply pipe networks and photovoltaic energy. The device comprises an energy storage controller, a cable, a heat exchange liquid tank and heat exchange liquid. The energy storage controller is electrically connected with a photovoltaic panel and stores electric energy generated by the photovoltaic panel. The energy storage controller transmits electric energy to heat the heat exchange liquid tank buried underground through the cable. The cable is electrically connected with an electric heating coil assembly arranged in the heat exchange liquid tank. The heat exchange liquid in the heat exchange liquid tank is used for heat transfer for the heat supply pipe network. The device utilizes the energy storage controller to balance the supply and demand of electric energy. The heat exchange liquid is heated through the electric heating mode, and then the heat supply pipe network is indirectly heated through a heat exchange pipe, so that the overheating phenomenon in the electric heating process is reduced. The heat exchange device is buried underground, soil covering is utilized for heat preservation, energy waste in winter heat exchange is reduced, and the device has high practical value and wide application prospect.

Description

Technical Field

[0001] This invention belongs to the field of heating network technology, specifically relating to a device and its usage method for coupling heating network with photovoltaics. Background Technology

[0002] With the rapid development of the new energy industry, some heating companies have built numerous rooftop distributed photovoltaic (PV) power generation systems. However, PV power generation is limited by natural resources, especially the intensity and duration of sunlight. During off-peak hours, such as at night or on cloudy or rainy days, PV power generation drops significantly or even to zero. If the generated electricity cannot be sold to the grid in a timely manner, it results in energy waste. To alleviate this problem, some companies are considering building energy storage battery systems to store energy during periods of sufficient sunlight and release it during peak demand or when sunlight is insufficient. However, the investment cost of building energy storage batteries is high, and companies cannot recoup their investment in the short term, making it less cost-effective. The high investment cost and long payback period of energy storage batteries make this solution uneconomical for most heating companies.

[0003] Meanwhile, heating companies face immense pressure during winter. They need to raise the temperature of the heating network water to ensure adequate heating in residents' homes. However, heat exchangers in the network are prone to scaling or malfunction during long-term operation, which not only reduces heat transfer efficiency but also increases energy consumption and operating costs. In particular, when scaling or malfunction occurs in the heat exchangers, heat is lost during transfer from the thermal power units. Therefore, how to efficiently and stably raise the heating temperature has become a pressing issue for heating companies.

[0004] Against this backdrop, the coupling of heating networks with photovoltaic power generation, which fully utilizes photovoltaic electricity that cannot be fed into the grid and efficiently converts it into heat energy, then transfers the heat to the heating network to increase heating temperature, is a win-win situation. It not only reduces energy waste but also improves heating efficiency and lowers operating costs. However, this approach faces several challenges. First, regarding heat transfer, while electric heating is the simplest and most effective method, the water in the heating network has a certain alkalinity and hardness, which can lead to scaling on the heat transfer surfaces, affecting heat transfer efficiency. To address this, more efficient and durable heat transfer materials and methods need to be developed to reduce scaling. Second, during the heating season, the low ambient temperature makes freeze protection and insulation of equipment a key factor affecting system stability. Without effective freeze protection and insulation, equipment is prone to freezing cracks or performance degradation. Therefore, it is necessary to strengthen the freeze protection and insulation design of equipment to ensure stable operation in low-temperature environments. Based on these issues, there is currently no mature integrated energy utilization system on the market that couples photovoltaic power with heating networks. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the present invention aims to provide a device and method for utilizing energy coupled with photovoltaic power in a heating network. This device can effectively utilize the electrical energy from distributed photovoltaic power that cannot be connected to the grid, converting electrical energy into heat energy to supplement the water temperature of the heating network during extremely cold periods, avoiding resource waste and improving energy efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for coupling heating network with photovoltaic power generation is characterized by comprising: an energy storage controller, cables, a heat exchange liquid tank, and a heat exchange liquid; the energy storage controller is electrically connected to the photovoltaic panel and stores the electrical energy generated by the photovoltaic panel; the energy storage controller transmits electricity through the cables to heat the heat exchange liquid tank buried underground; the cables are electrically connected to an electric heating coil assembly installed inside the heat exchange liquid tank; the heat exchange liquid in the heat exchange liquid tank is used to transfer heat to the heating network.

[0008] As a further improvement of the present invention, the heat exchange fluid is demineralized water or dimethyl silicone oil.

[0009] As a further improvement of the present invention, a number of stainless steel heat exchange tubes are also provided in the heat exchange tank; each stainless steel heat exchange tube is provided with fins whose direction corresponds to the flow direction of the heat exchange tank, and the density of the stainless steel heat exchange tubes increases uniformly from the middle to the edge; the arrangement of the stainless steel heat exchange tubes increases in density from the middle to the edge; one end of the stainless steel heat exchange tube is connected to the heat exchange tube inlet pipe, and the other end is connected to the heat exchange tube outlet pipe.

[0010] As a further improvement of the present invention, the stainless steel heat exchange tube and the electric heating coil assembly are arranged opposite to each other.

[0011] As a further improvement of the present invention, a stirring device is provided at the bottom of the heat exchange tank.

[0012] As a further improvement of the present invention, a number of temperature monitors are also provided in the heat exchange tank, wherein at least one temperature monitor is placed on one side of the electric heating coil assembly and at least one temperature monitor is placed on one side of the stainless steel heat exchange tube.

[0013] As a further improvement of the present invention, a number of pressure monitors are also provided in the heat exchange tank, wherein at least one pressure monitor is placed on one side of the electric heating coil assembly and at least one pressure monitor is placed on one side of the stainless steel heat exchange tube.

[0014] As a further improvement of the present invention, a heat exchanger injection pipe and a heat exchanger displacement pipe are provided in pairs on the top of the heat exchanger tank, which are controlled to open and close by a heat exchanger injection valve and a heat exchanger displacement pipe valve, respectively.

[0015] As a further improvement of the present invention, a status monitoring tube is also provided inside the heat exchange tank.

[0016] The method of using a device for coupling heating network and photovoltaic power generation according to the present invention includes: the photovoltaic panel converts light energy into electrical energy, which is collected by the energy storage controller and supplied to the electric heating coil assembly according to demand; the electric heating coil assembly heats the heat exchange fluid to a predetermined temperature and outputs the heat to the heating network.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The present invention discloses a device for coupling and utilizing a heating network with photovoltaic power. This device utilizes the electrical energy generated by photovoltaic power, which is collected through an energy storage controller to balance supply and demand. The heat exchange fluid is heated by electric heating, and then the heating network is indirectly heated through the heat exchange tubes, which can reduce overheating during the electric heating process. The heat exchange device is buried underground, and the soil covering can be used for insulation, reducing energy waste during heat exchange in winter.

[0019] Furthermore, the heat exchange fluid uses demineralized water or dimethyl silicone oil. Both media have good chemical and thermal stability, and will not cause scaling or material corrosion problems, which can improve the efficiency and stability of the equipment operation.

[0020] Furthermore, stainless steel heat exchange tubes possess excellent corrosion resistance and thermal conductivity, which enhances the efficiency of heat exchange between the heat exchange device and the heating network. Fins aligned with the flow direction of the heat exchange fluid tank further improve heat exchange efficiency and avoid obstructing the flow of the heat exchange fluid. The arrangement of the stainless steel heat exchange tubes increases in density from the center to the edges, facilitating uniform heat distribution and effective heat transfer.

[0021] Furthermore, the stainless steel heat exchange tubes and the electric heating coil assembly are arranged in a staggered relative manner to ensure the uniform distribution of heat in the heat exchange tank and the effective use of space to store heat.

[0022] Furthermore, a stirring device is installed at the bottom of the heat exchange liquid tank to promote the circulation and mixing of the heat exchange liquid and improve the heat exchange efficiency.

[0023] Furthermore, temperature monitors are installed in the heat exchange tank, one on each side of the electric heating coil assembly and the other on the stainless steel heat exchange tube, to monitor the temperature of the device in real time and ensure safe operation. The temperature difference between the two sides of the electric heating coil assembly and the stainless steel heat exchange tube can be used to guide the control of the agitator speed and improve heat exchange efficiency.

[0024] Furthermore, the pressure monitors installed in the heat exchange tank are located on one side of the electric heating coil assembly and the stainless steel heat exchange tube, respectively, to monitor the temperature of the device in real time and ensure safe operation; the pressure difference between the two sides of the electric heating coil assembly and the stainless steel heat exchange tube can be used to guide the control of the agitator speed and improve heat exchange efficiency.

[0025] Furthermore, a pair of heat exchanger injection pipes and heat exchanger replacement pipes are installed on the top of the heat exchanger tank for adding and replacing the heat exchanger; the heat exchanger can also be completely drained by injecting nitrogen, and the tank can be filled with nitrogen for corrosion prevention during periods of inactivity.

[0026] Furthermore, a status monitoring tube is installed in the heat exchanger tank, which can be connected to a conductivity meter or a moisture meter to measure the status of the heat exchanger and determine whether the heat exchanger needs to be replaced. Attached Figure Description

[0027] Figure 1 This is a longitudinal cross-sectional schematic diagram of a device for coupling heating pipe network and photovoltaic power according to the present invention;

[0028] Figure 2 This is a top view of a device for coupling heating pipe network with photovoltaic power according to the present invention;

[0029] Figure 3 This is a longitudinal cross-sectional schematic diagram of the stainless steel heat exchanger tube device of the present invention.

[0030] Among them, 1. Photovoltaic panel; 2. Photovoltaic panel; 3. Heat exchange fluid replacement pipeline valve; 4. Heat exchange fluid injection pipeline valve; 5. Cable; 6. Energy storage controller; 7. Heat exchange fluid replacement pipeline; 8. Heat exchange fluid injection pipeline; 9. Electric heating coil assembly; 10. Stainless steel heat exchange tube; 11. Photovoltaic panel; 12. Heat exchange fluid; 13. Photovoltaic cable; 14. Stirring device; 15. First temperature monitor; 16. Second temperature monitor; 17. Heat exchange tube inlet pipeline; 18. Heat exchange fluid tank; 19. First pressure monitor; 20. Second pressure monitor; 21. Status monitoring tube; 22. Heat exchange tube outlet pipeline; 23. Fins. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0032] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Example 1

[0035] like Figure 1 As shown, the present invention provides a device for coupling and utilizing a heating network with photovoltaic power, including an energy storage controller 6, a cable 5, a heat exchange liquid tank 18, and a heat exchange liquid 12; the energy storage controller 6 is electrically connected to photovoltaic panels 1, 2, and 11 to store the electrical energy generated by the photovoltaic panels; the energy storage controller 6 transmits electricity through the cable 5 to heat the heat exchange liquid tank 18 placed underground; the cable 5 is electrically connected to an electric heating coil assembly 9 installed in the heat exchange liquid tank 18; the heat exchange liquid 12 in the heat exchange liquid tank 18 is used to connect to the heating network to provide heat.

[0036] The energy storage controller 6 serves as the core of power management and distribution, ensuring a stable power supply and efficient utilization. Cables 5 act as the medium for power transmission, transferring power from the energy storage controller to the electric heating coil assembly 9 located in the underground heat exchange tank. The selection of cables must consider their high-temperature resistance, corrosion resistance, and safety performance.

[0037] The heat exchanger tank 18 is made of carbon steel and has a rectangular structure. Buried more than 3 meters underground, it can be insulated with soil, reducing energy waste during winter heat exchange. The heat exchanger fluid 12 is demineralized water. Demineralized water refers to the finished water obtained after removing suspended solids, colloids, and inorganic cations and anions from water using various water treatment processes. The conductivity of water can be measured with a conductivity meter, and the purity of water can be measured by its conductivity. Therefore, a status monitoring tube 21 is installed in the heat exchanger tank 18, which can be connected to a conductivity meter or a moisture meter to measure the status of the heat exchanger fluid 12 and determine whether it needs to be replaced. The status monitoring tube 21 can also be used to monitor the color and transparency of the heat exchanger fluid 12, providing important reference for the maintenance and management of the equipment.

[0038] The heat exchange tank 18 also includes a reciprocating electric heating coil assembly 9, used to further increase the heat exchange area and improve heat exchange efficiency. Figure 2 As shown, the stainless steel heat exchange tube 10 and the electric heating coil assembly 9 are arranged opposite each other to avoid mutual interference and to make full use of the heat storage space in the heat exchange liquid tank 18, thereby improving the uniformity and stability of heat exchange. One end of the stainless steel heat exchange tube 10 is connected to the heat exchange tube inlet pipe 17, and the other end is connected to the heat exchange tube outlet pipe 22, which is used to connect to the heating network to provide heat.

[0039] The heat exchanger tank 18 also includes a bottom-mounted stirring device 14 to promote the circulation and mixing of the heat exchanger fluid 12, thereby improving heat exchange efficiency. The stirring device 14 can be electrically connected to the energy storage controller 6, which controls its start-up, shutdown, and speed. When the energy storage controller 6 continuously supplies power to the electric heating coil assembly 9, the stirring device 14 can be turned on, and its speed can be increased as needed; when the energy storage controller 6 stops supplying power to the electric heating coil assembly 9, the speed can be gradually reduced until the stirring device 14 is turned off.

[0040] Several temperature monitors are installed in the heat exchange tank 18, with the first temperature monitor 15 located on one side of the electric heating coil assembly 9 and the second temperature monitor 16 located on one side of the stainless steel heat exchange tube 10. Temperature monitors 15 and 16 are used to monitor the temperature of the device in real time to ensure safe operation. The temperature difference between the electric heating coil assembly 9 and the stainless steel heat exchange tube 10 can be used to guide the control of the stirring speed of the agitator 14, improving heat exchange efficiency. This invention can also be equipped with a control device that, based on the monitored temperature difference data between the electric heating coil assembly 9 and the stainless steel heat exchange tube 10, combined with real-time weather, heating demand, and energy storage status, automatically controls the output of the energy storage controller 6 and the opening, closing, and speed of the agitator 14, while simultaneously adjusting the flow rate of the heat exchange medium within the stainless steel heat exchange tube 10, achieving precise heat supply and regulation to improve energy utilization efficiency.

[0041] Example 2

[0042] like Figures 1-2 As shown, this invention provides a device for coupling heating pipe networks with photovoltaic power, including an energy storage controller 6, a cable 5, a heat exchange liquid tank 18, and a heat exchange liquid 12. The energy storage controller 6 is electrically connected to photovoltaic panels 1, 2, and 11 via photovoltaic cables 13, storing the electrical energy generated by the photovoltaic panels. The energy storage controller 6 transmits electricity through the cable 5 to heat the underground heat exchange liquid tank 18. The cable 5 is electrically connected to an electric heating coil assembly 9 installed in the heat exchange liquid tank 18. The heat exchange liquid 12 in the heat exchange liquid tank 18 is used to connect to the heating pipe network to provide heat. The electric heating coil assembly 9 and the stainless steel heat exchange tube 10 adopt advanced welding and sealing technology to ensure leak-free and long-term stable operation.

[0043] The heat exchange fluid 12 is made of dimethyl silicone oil. Dimethyl silicone oil has excellent chemical stability, high-temperature stability, low toxicity, low corrosiveness, non-volatility, and resistance to oxidation, making it a suitable heat transfer medium. Alternatively, the heat exchange fluid 12 can also be made of novel, high-efficiency heat exchange fluids, such as nanofluids or phase change materials, to improve heat exchange efficiency and heat transfer rate.

[0044] The heat exchange tank 18 also includes a reciprocating electric heating coil assembly 9, used to further increase the heat exchange area and improve heat exchange efficiency. Figure 2As shown, the stainless steel heat exchange tubes 10 and the electric heating coil assembly 9 are arranged in a staggered manner to avoid mutual interference and to fully utilize the heat storage space within the heat exchange tank 18, thereby improving the uniformity and stability of heat exchange. The heat exchange tank 18 can also have its internal design optimized, employing a multi-stage heat exchange structure to increase the heat exchange area and reduce heat loss. For example... Figure 3 As shown, each stainless steel heat exchange tube 10 is equipped with fins 23 whose direction corresponds to the flow direction of the heat exchange liquid tank. The fins can increase the heat exchange area. The flow direction is up and down, and the direction of the fins corresponds to the flow direction in the heat exchange liquid tank, which helps to increase the flow velocity and enhance the heat exchange efficiency. The arrangement of the stainless steel heat exchange tubes 10 can increase the density from the middle to the edge, with a looser middle and denser edge, which facilitates the uniform distribution and effective transfer of heat and avoids the reduction in heat exchange efficiency caused by excessive heat concentration. One end of the stainless steel heat exchange tube 10 is connected to the heat exchange tube inlet pipe 17, and the other end is connected to the heat exchange tube outlet pipe 22, which is used to connect to the heating network to provide heat.

[0045] The heat exchange tank 18 also includes a stirring device 14 at the bottom to promote the circulation and mixing of the heat exchange fluid 12 and improve the heat exchange efficiency.

[0046] Several pressure monitors are installed in the heat exchange tank 18, with the first pressure monitor 19 located on one side of the electric heating coil assembly 9 and the second pressure monitor 20 located on the other side of the stainless steel heat exchange tube 10. Pressure monitors 19 and 20 are used to monitor the pressure of the device in real time to ensure safe operation; the pressure difference between the electric heating coil assembly 9 and the stainless steel heat exchange tube 10 can be used to guide the control of the agitator 14's rotation speed, thereby improving heat exchange efficiency.

[0047] Example 3

[0048] This invention provides a method for using a device that couples a heating network with photovoltaic power, comprising:

[0049] The photovoltaic panel converts light energy into electrical energy, which is collected by the energy storage controller 6 and supplied to the electric heating coil assembly 9 according to demand. The electric heating coil assembly 9 heats the heat exchange fluid 12 to a predetermined temperature and outputs the heat to the heating network.

[0050] When heat exchange fluid 12 needs to be injected, open heat exchange fluid injection pipe valve 4, and inject it into heat exchange fluid tank 18 through heat exchange fluid injection pipe 8. When heat exchange fluid 12 needs to be discharged, open heat exchange fluid injection pipe valve 4, inject dry nitrogen gas through heat exchange fluid injection pipe 8, and open heat exchange fluid displacement pipe valve 3. Relying on gas pressure, the heat exchange fluid 12 is squeezed out of heat exchange fluid tank 18 through heat exchange fluid displacement pipe 7. In summer and other times when the heating network does not require heat exchange, dry nitrogen gas can be injected into heat exchange fluid tank 18 through heat exchange fluid injection pipe 8 to discharge heat exchange fluid 12 from heat exchange fluid tank 18. During the off-season, the device is protected against corrosion by filling it with nitrogen. After the heat exchange fluid 12 is discharged, the injected nitrogen gas provides physical support for heat exchange fluid tank 18 to prevent it from being crushed by the soil covering.

[0051] When demineralized water is used as the heat exchange fluid 12, its conductivity can be monitored via the status monitoring tube 21. Demineralized water typically has low conductivity due to its low ion content. However, as the dissolved salts or other conductive substances in the heat exchange fluid increase, the conductivity rises, usually indicating the accumulation of deposits, corrosion products, or other impurities. When the conductivity exceeds 10 μS / cm, the heat exchange fluid 12 needs to be replaced using the following replacement method to prevent the accumulation of deposits and corrosion products.

[0052] First, ensure a sufficient quantity of fresh, qualified demineralized water is available as the new heat exchange fluid. Then, before replacement, shut down the unit and disconnect the power and fluid supply. Next, open the heat exchange fluid replacement valve 3 to discharge the old heat exchange fluid into the designated collection container. Then, use appropriate cleaning agents and tools to clean the heat exchange fluid tank 18 to remove residual deposits and corrosion. Next, inject the prepared fresh demineralized water into the heat exchange fluid tank 18 through the heat exchange fluid injection valve 4 until the specified level is reached. Finally, after confirming that the heat exchange fluid tank 18 has been thoroughly cleaned and filled with new fluid, restart the unit and perform necessary commissioning and checks to ensure normal operation. After replacement, continue to monitor the conductivity of the heat exchange fluid through the status monitoring pipe 21 to ensure it remains within the specified range.

[0053] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

[0054] The above content provides a further detailed description of the present invention. It should not be construed that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection of the present invention as defined by the submitted claims.

Claims

1. A device for coupling heating pipe network with photovoltaic power, characterized in that, include: The system includes an energy storage controller (6), a cable (5), a heat exchange tank (18), and a heat exchange fluid (12). The energy storage controller (6) is electrically connected to the photovoltaic panel and stores the electrical energy generated by the photovoltaic panel. The energy storage controller (6) transmits electricity through the cable (5) to heat the heat exchange tank (18) buried underground. The cable (5) is electrically connected to the electric heating coil assembly (9) installed inside the heat exchange tank (18). Several stainless steel heat exchange tubes (10) are also installed inside the heat exchange tank (18). One end of each stainless steel heat exchange tube (10) is connected to the heat exchange tube inlet pipe, and the other end is connected to the heat exchange tube outlet pipe for connection to the heating network. The stainless steel heat exchange tubes (10) and the electric heating coil assembly (9) are arranged opposite to each other. The heat exchange fluid (12) in the heat exchange tank (18) is used to transfer the heat generated by the electric heating coil assembly (9) to the stainless steel heat exchange tubes (10). Several temperature monitors (15, 16) are also provided in the heat exchange tank (18), of which at least one temperature monitor (15) is placed on one side of the electric heating coil assembly (9), and at least one temperature monitor (16) is placed on one side of the stainless steel heat exchange tube (10). Several pressure monitors are also installed in the heat exchange tank (18), of which at least one pressure monitor (19) is placed on one side of the electric heating coil assembly (9), and at least one pressure monitor (20) is placed on one side of the stainless steel heat exchange tube (10). Each stainless steel heat exchange tube (10) is provided with fins (23) that correspond to the direction of the heat exchange liquid tank flow, and the density of the stainless steel heat exchange tubes (10) increases uniformly from the middle to the edge. Dry nitrogen is injected through the heat exchange liquid injection pipe (8), and the heat exchange liquid replacement pipe valve (3) is opened. The heat exchange liquid (12) is squeezed out of the heat exchange liquid tank (18) by the gas pressure through the heat exchange liquid replacement pipe (7). When the heating network does not need heat exchange in summer, dry nitrogen is injected into the heat exchange liquid tank (18) through the heat exchange liquid injection pipe (8) to discharge the heat exchange liquid (12) in the heat exchange liquid tank (18). During the shutdown period, the device is protected against corrosion by filling it with nitrogen. After the heat exchange liquid (12) is discharged, the nitrogen is filled to provide physical support for the heat exchange liquid tank (18) to avoid damage from the soil covering. The temperature difference between the electric heating coil assembly and the stainless steel heat exchange tube is used to guide the control of the speed of the agitator.

2. The device for coupling heating network with photovoltaic power according to claim 1, characterized in that, The heat exchange fluid (12) is either demineralized water or dimethyl silicone oil.

3. The device for coupling heating pipe network with photovoltaic power according to claim 1, characterized in that, A stirring device (14) is installed at the bottom of the heat exchange tank (18).

4. The device for coupling heating network with photovoltaic power according to claim 1, characterized in that, The top of the heat exchanger tank (18) is provided with a heat exchanger injection pipe (8) and a heat exchanger displacement pipe (7), which are controlled to open and close by the heat exchanger injection valve (4) and the heat exchanger displacement pipe valve (3), respectively.

5. The device for coupling heating pipe network with photovoltaic power according to claim 1, characterized in that, A status monitoring tube (21) is also installed inside the heat exchange tank (18).

6. The method of using the device for coupling heating network and photovoltaic utilization according to claim 1, comprising: The photovoltaic panel converts light energy into electrical energy, which is collected by the energy storage controller (6) and supplied to the electric heating coil assembly (9) according to demand. The electric heating coil assembly (9) heats the heat exchange fluid (12) to a predetermined temperature and outputs the heat to the heating network.

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