Conversion and cyclic utilization system based on high-rise building photovoltaic power generation and pumped storage

Abstract

A conversion and cyclic utilization system based on high-rise building photovoltaic power generation and pumped storage comprises a building photovoltaic power generation device, a pumped storage device and a control unit. The pumped storage device is used for converting electric energy into potential energy of water for storage or converting the potential energy of the water into electric energy and comprises an upper water pool and a lower water pool which are communicated through a drainage pipe and a water storage pipe, a drainage electromagnetic valve is arranged on the drainage pipe, and a pumping electromagnetic valve is arranged on the water storage pipe. A water pump connected with the water storage pipe and a running water generator connected with the drainage pipe are arranged in the lower water tank; the upper water tank is higher than the lower water tank; and the control unit controls the pumped storage device to perform potential energy and electric energy conversion based on the current generating capacity of the building photovoltaic power generation device or the current power supply capacity of the power grid. According to the invention, the photovoltaic power generation can be adjusted, so that the high-rise building becomes a green energy-consuming object which operates stably for a long time, and meanwhile, water in the water pool on the roof can be used for greening and maintenance around the building, so that the cyclic utilization of water resources is realized.

Description

Technical Field

[0001] The present invention relates to the regulation of building photovoltaic electric energy and the recycling of rainwater, and particularly to a conversion and recycling system based on high-rise building photovoltaic power generation and pumped storage. Background Art

[0002] In recent years, the application of building photovoltaic power generation has been increasing. However, building photovoltaic power generation is greatly affected by weather, with unstable power generation and low matching degree with building electricity consumption, and a power energy storage device needs to be equipped for regulation. Currently, it is relatively common to use battery energy storage to regulate the fluctuations of photovoltaic power, but the economic cost of using batteries is very high. The operation mode of traditional pumped storage power stations is greatly affected by geographical conditions and weather, with limited regulation ability and is not suitable for use in big cities. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a conversion and recycling system based on high-rise building photovoltaic power generation and pumped storage, which can reduce the use of batteries, has low cost, is less restricted by geographical conditions and weather, has large regulation ability, and is suitable for use in big cities.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A conversion and recycling system based on high-rise building photovoltaic power generation and pumped storage, including a building photovoltaic power generation device, a pumped storage device, and a control unit; The pumped storage device is used to convert electric energy into the potential energy of water for storage or convert the potential energy of water into electric energy, and includes an upper water tank and a lower water tank. The upper water tank and the lower water tank are connected through a drain pipe and a water storage pipe. A drain solenoid valve is provided on the drain pipe, and a pumping solenoid valve is provided on the water storage pipe. A water pump connected to the water storage pipe and a water current generator connected to the drain pipe are provided in the lower water tank. The arrangement position of the upper water tank is higher than that of the lower water tank; The control unit controls the conversion of potential energy and electric energy of the pumped storage device based on the current power generation of the building photovoltaic power generation device or the current power supply of the power grid; both the building photovoltaic power generation device and the pumped storage device are connected to the power grid.

[0005] Further, the upper water tank is arranged on the roof, and the lower water tank is arranged in the basement.

[0006] Further, the control unit includes a power generation amount judgment module, which judges whether the power generation amount is higher than a preset threshold based on the current power generation of the building photovoltaic power generation device. If it is lower than the preset threshold, a power generation signal is sent to the control module; if it is higher than the preset threshold, a water storage signal is sent to the control module; The power supply amount judgment module judges whether the power supply amount is lower than a preset threshold based on the current power supply amount of the power grid. If it is lower than the preset threshold, it sends a power generation signal to the control module; if it is higher than the preset threshold, it sends a water storage signal to the control module.

[0007] Further, the control module includes a solenoid valve control module, a water pump control module, and a flow generator control module; The solenoid valve control module opens the drain solenoid valve or the pumping solenoid valve based on the power generation or water storage signal sent by the power generation amount judgment module or the power supply amount judgment module; The water pump control module controls the water pump to store water in the upper water tank based on the water storage signal sent by the power generation amount judgment module or the power supply amount judgment module; The flow generator control module controls the flow generator to generate electricity based on the power generation signal sent by the power generation amount judgment module or the power supply amount judgment module.

[0008] Further, the control unit includes an alarm module for sending an alarm signal when an abnormal situation occurs in the system; an interruption module for disconnecting the system power supply and interrupting the system operation based on the alarm signal of the alarm module.

[0009] Further, a rainwater collection and filtration device is provided on the upper water tank.

[0010] Further, the control unit includes a water tank water volume adjustment module for balancing the water volumes of the two water tanks based on a preset threshold.

[0011] Further, the system further includes a first water level monitoring device provided on the upper water tank and a second water level monitoring device provided on the lower water tank for real-time water level monitoring of the upper water tank and the lower water tank, and sending the detection signal to the water tank water volume adjustment module to cooperate with this module to adjust the water volumes of the two water tanks.

[0012] The technical principle of the present invention: Adopting the pumped-storage method, taking advantage of the very considerable height difference of high-rise buildings in the city for pumped-storage power generation. When the photovoltaic power generation in the building is surplus, the electric energy is converted into the potential energy of water, and when the photovoltaic power generation in the building is insufficient, the water is released to generate electricity, realizing the maximum utilization of the height difference of high-rise buildings, making high-rise buildings become an object of long-term stable operation for energy conservation and emission reduction. This solution makes the conversion and recycling less restricted by weather and geographical conditions. It can store the excessive electric energy output by the photovoltaic into the potential energy of water when the output of the photovoltaic is too large, and release water to generate electricity and stably output when the output is too small. It not only plays a regulating role in photovoltaic power generation, but also reduces the use of storage batteries, with low cost and no pollution.

[0013] The beneficial effects of the present invention: 1. Utilize the very significant height difference of high-rise buildings to generate hydroelectric power. The water cycle is in a closed system, with almost no water evaporation or leakage, and rainwater replenishment. The required water volume is small and it is easy to implement. The size of the water tank and the flow rate can be designed according to the actual height of the floor and the electricity consumption to control the power generation amount and power generation time. 2. By using the method of pumped storage and re-generation to replace the battery for regulating the output of photovoltaic power, the power quality and utilization efficiency are improved. At the same time, the use of this set of devices reduces the use of batteries, and the economic benefits are more significant, thus achieving energy conservation and emission reduction. 3. Utilize combined photovoltaic and rainwater power generation, which is less restricted by weather and site conditions, has high system stability and is easy to maintain, and can be widely used in cities. At the same time, the proportion of photovoltaic and rainwater collection can be designed according to the annual precipitation of specific cities, giving full play to the adjustment ability of this set of devices and having great flexibility. 4. It helps to solve the problem of fire extinguishing in high-rise buildings. For high-rise buildings over 100 meters, it is difficult for fire trucks to play a role, and the water pressure of the tap water system in the building cannot meet the fire extinguishing requirements. Therefore, once a fire occurs, it will cause great economic losses. If this set of systems is connected to the building fire extinguishing system, the higher water pressure can help with smooth fire extinguishing inside the building when a fire occurs in high-rise buildings. 5. By placing a large water tank on the top floor of the building, rainwater can be stored, and a large amount of precipitation will not flow away in vain through the rainwater pipes, and it can also reduce the pressure on the urban sewer drainage system during heavy rain. At the same time, a large amount of water in the water tank can absorb the energy of the strong sunlight in summer, avoiding the roof temperature from being directly irradiated by the sun, thereby reducing the heat absorbed by the building and lowering the room temperature. 6. After meeting the green electricity demand of the building, the water in the water tank on the roof is connected to the automatic greening irrigation device for maintaining the greening around the building, realizing the recycling of water resources. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of a conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings; In the figure: 1. Building photovoltaic roof battery panel, 2. First water level monitoring device, 3. Building photovoltaic power generation film, 4. Control unit, 5. Second water level monitoring device, 6. Flow water generator, 7. Drainage solenoid valve, 8. Lower water tank, 9. Water pump, 10. Pumping solenoid valve, 11. Upper water tank, 12. Rainwater collection and filtration device, 13. Automatic greening irrigation device. Detailed Embodiments

[0015] To illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and the drawings. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0016] Referring to Figure 1 , a conversion recycling system based on photovoltaic power generation and pumped-storage in high-rise buildings, includes a building photovoltaic power generation device, a pumped-storage device and a control unit 4; the pumped-storage device is used to convert electrical energy into the potential energy of water for storage or convert the potential energy of water into electrical energy, and includes an upper water tank 11 and a lower water tank 8. The upper water tank 11 and the lower water tank 8 are connected through a drain pipe and a water storage pipe. A drain solenoid valve 7 is provided on the drain pipe, and a pumping solenoid valve 10 is provided on the water storage pipe. A water pump 9 connected to the water storage pipe and a flow generator 6 connected to the drain pipe are provided in the lower water tank 8. In the present invention, the height difference of medium- or high-rise buildings in the city is utilized for pumped-storage power generation. Therefore, the layout position of the upper water tank 11 should be higher than that of the lower water tank 8, that is, the upper water tank 11 is arranged on the roof and the lower water tank 8 is arranged in the basement. The control unit 4 controls the conversion of potential energy and electrical energy of the pumped-storage device based on the current power generation amount of the building photovoltaic power generation device or the current power supply amount of the power grid, and includes a power generation amount judgment module, which judges whether the power generation amount is higher than a preset threshold based on the current power generation amount of the building photovoltaic power generation device. If it is lower than the preset threshold, a power generation signal is sent to the control module. If it is higher than the preset threshold, a water storage signal is sent to the control module; a power supply amount judgment module, which judges whether the power supply amount is lower than a preset threshold based on the current power supply amount of the power grid. If it is lower than the preset threshold, a power generation signal is sent to the control module. If it is higher than the preset threshold, a water storage signal is sent to the control module; a solenoid valve control module, which opens the drain solenoid valve 7 or the pumping solenoid valve 10 based on the power generation or water storage signal sent by the power generation amount judgment module or the power supply amount judgment module; a water pump control module, which controls the water pump 9 to store water in the upper water tank 11 based on the water storage signal sent by the power generation amount judgment module or the power supply amount judgment module; a flow generator control module, which controls the flow generator 6 to generate electricity based on the power generation signal sent by the power generation amount judgment module or the power supply amount judgment module.

[0017] To ensure the safety of the system, an alarm module and an interruption module are also set in the control unit of the present invention. This module can send an alarm signal according to abnormal situations such as control failure, failure of the water storage and power generation device, and failure of water level control in the system. After receiving the alarm signal, the signal control interruption module disconnects the system power supply and interrupts the system operation.

[0018] A rainwater collection and filtration device 12 is provided on the upper water tank 11, which can effectively utilize the potential energy of high-rise rainwater for power generation and can be used for the automatic irrigation device 13 for greening, saving energy, recycling water resources and improving economic benefits.

[0019] To better distribute the water storage amounts in the upper water tank 11 and the lower water tank 8, a water tank water volume adjustment module is also set in the control unit 4. This module balances and adjusts the water volumes of the two water tanks based on a preset threshold.

[0020] The system further includes a first water level monitoring device 2 disposed on the upper water tank 11 and a second water level monitoring device 5 disposed on the lower water tank 8, which monitor the water levels of the upper water tank 11 and the lower water tank 8 in real time, send detection signals to the water volume adjustment module of the water tank, and cooperate with this module to adjust the water volumes of the two water tanks.

[0021] The working principle of the system of the present invention: The current power generation amount of the building photovoltaic power generation device is judged by the power generation amount judgment module in the control unit or the current power supply amount of the power grid is judged by the power supply amount judgment module. According to the currently required mode, the solenoid valve control module, the water pump control module and the flow generator control module are used to control the drain solenoid valve 7, the pumping solenoid valve 10, the water pump 9 and the flow generator 6 to perform operations of storing water or generating electricity. The rainwater collection and filtration device and the water storage function of the system are used to store water in the upper water tank, so as to achieve the purpose of energy storage. The detection values of the first water level monitoring device 2 and the second water level detection device 5 are compared with the preset thresholds in the water volume adjustment module of the water tank, so as to adjust the balance of the water volumes in the upper water tank 11 and the lower water tank 8, and avoid the water being too full or too little. If an abnormal situation occurs in the system, the alarm module will send an alarm signal, and the interruption module will disconnect the system power supply according to the alarm signal and interrupt the system operation to ensure the safety of the system.

[0022] The present invention will be further described below through specific embodiments.

[0023] The upper water tank 11 is placed on the roof of a high-rise building or a high-rise building, and the lower water tank 8 is placed in the basement. The building photovoltaic power generation device can adopt building photovoltaic panels 1 disposed on the roof or building photovoltaic power generation films 3 pasted on the wall or glass of the building.

[0024] On a sunny day, the electricity generated by the photovoltaic system is inverted and then connected to the power grid to supplement the insufficient power consumption of the grid. At the same time, the power generation judgment module in the control unit 4 is used to monitor the outputs of the building photovoltaic panels 1 and the building photovoltaic thin films 3 in real time. When the power output of the photovoltaic system is too large, the water pump 9 is used to store energy by pumping water in time to consume the excessive power output of the photovoltaic system, avoiding impact on the power grid. Specifically, when the power generation judgment module detects that the output of the photovoltaic system is too large, the solenoid valve control module opens the water pumping solenoid valve 10, and the water pump control module sends an opening signal to the water pump 9. Then, the water in the lower water tank 8 is pumped to the top floor using the electric energy in the power grid. At this time, this set of systems is equivalent to the charging process of a battery. When the output of the photovoltaic system is too small, the system stops the water pumping process. The power generation judgment module sends a power generation signal to the flowing water generator control module, the solenoid valve control module sends an opening signal to the drain solenoid valve 7, and the flowing water generator control module sends a power generation signal to the flowing water generator 6. The drain pipe starts to release water to generate electricity to stabilize the output of the photovoltaic system. At this time, the system is equivalent to the discharging process of a battery. Throughout the process, the output of the photovoltaic system is always kept relatively stable, avoiding excessive impact on the power grid. At night, the power supply judgment module in the control unit of this system is used to judge the current power supply of the power grid. If the current power supply reaches the preset threshold, a water storage signal is sent to the water pump 9, the solenoid valve control module sends an opening signal to the water pumping solenoid valve 10, and the water pump control module sends a water storage signal to the water pump 9. Thus, the excess power of the power grid at night is used to supply power to the water pump 9 for pumping water and energy storage until the first water level monitoring device 2 on the upper water tank 11 on the roof detects that the water level of the upper water tank 11 on the roof reaches the upper limit and then stops pumping water. During the day, the water stored in the upper water tank 11 is released to generate electricity using the flowing water generator 6 to supplement the power supply of the power grid during the daytime electricity peak, achieving the purpose of conversion and recycling.

[0025] On rainy days, the rainwater collection and filtration device 12 installed on the upper water tank 11 is used to receive and collect rainwater, conduct preliminary filtration, and accumulate the water level. When the building power consumption increases sharply, the power supply judgment module judges that the power generation of the building photovoltaic system is insufficient, and sends a power generation signal to the flowing water generator 6 through the flowing water generator control module. At the same time, the solenoid valve control module sends an opening signal to the drain solenoid valve 7 to start generating electricity to supplement the insufficient power consumption.

[0026] On cloudy days, only the pumped-storage energy device is used to adjust the power supply to achieve the purpose of conversion and recycling.

[0027] In summary, the present invention adopts the pumped-storage method to utilize the considerable height difference of high-rise buildings in the city for pumped-storage power generation. It converts the surplus electric energy of building photovoltaic into the potential energy of water, and then discharges water for power generation when the building photovoltaic power generation is insufficient, achieving the maximum utilization of the height difference of high-rise buildings and making high-rise buildings become an object of energy conservation and emission reduction with long-term stable operation. This solution makes the conversion and recycling less restricted by weather and geographical conditions, and at the same time, the power generation efficiency of high-potential water is considerable. The system can further convert the excessive electric energy output by the photovoltaic into the potential energy of water for storage when the photovoltaic output is too large, and discharge water for power generation to stably output when the output is too small. It not only plays a regulating role in photovoltaic power generation, but also reduces the use of storage batteries, with low cost and no pollution, further improving the penetration rate of renewable energy in the power grid. At the same time, in recent years, the application of rainwater power generation has become more and more extensive. The rainwater collected on the rooftops of high-rise buildings itself has a large potential energy. The present invention uses a collection device to use rainwater for power generation, thereby realizing the use of rainwater for power generation to supplement the insufficient urban electricity consumption, improving economic benefits and the effect of energy conservation and emission reduction.

[0028] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation modes of the present invention. For those of ordinary skill in the art, based on the above description, other different forms of changes or variations can be made. It is impossible to enumerate all the implementation modes here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings, characterized by: It includes building photovoltaic power generation device, pumped storage device and control unit; The pumped storage device is used to convert electrical energy into water potential energy for storage or convert water potential energy into electrical energy, and comprises an upper water tank and a lower water tank, wherein the upper water tank is connected to the lower water tank through a drainage pipe and a water storage pipe, wherein a drainage solenoid valve is provided on the drainage pipe, and a pumping solenoid valve is provided on the water storage pipe, wherein a water pump connected to the water storage pipe and a flow generator connected to the drainage pipe are provided in the lower water tank, and the upper water tank is arranged at a higher position than the lower water tank; The control unit controls the pumped storage device to convert potential energy and electrical energy based on the current power generation of the building photovoltaic power generation device or the current power supply of the power grid; the building photovoltaic power generation device and the pumped storage device are both connected to the power grid.

2. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 1 is characterized in that: The upper water pool is arranged on the roof, and the lower water pool is arranged in the basement.

3. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 1 or 2 is characterized in that: The control unit includes a power generation judgment module, which judges whether the power generation is higher than a preset threshold based on the current power generation of the building photovoltaic power generation device, and sends a power generation signal to the control module if it is lower than the preset threshold; if it is higher than the preset threshold, it sends a water storage signal to the control module; The power supply judgment module judges whether the power supply is lower than the preset threshold based on the current power supply of the power grid. If it is lower than the preset threshold, it sends a power generation signal to the control module; if it is higher than the preset threshold, it sends a water storage signal to the control module.

4. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 3 is characterized by: The control module includes a solenoid valve control module, a water pump control module, and a water generator control module; The solenoid valve control module opens the drainage solenoid valve or the pumping solenoid valve based on the power generation or water storage signal sent by the power generation judgment module or the power supply judgment module; A water pump control module controls the water pump to store water in the upper pool based on the water storage signal sent by the power generation judgment module or the power supply judgment module; The flow generator control module controls the flow generator to generate electricity based on the power generation signal sent by the power generation judgment module or the power supply judgment module.

5. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 4 is characterized in that: The control unit includes an alarm module, which is used to send out an alarm signal when an abnormal situation occurs in the system; and an interruption module, which disconnects the system power supply and interrupts the system operation based on the alarm signal of the alarm module.

6. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 1 or 2 is characterized in that: The upper water pool is provided with a rainwater collecting and filtering device.

7. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 1 or 2 is characterized in that: The control unit includes a water volume adjustment module for balancing the water volumes of the two water pools based on a preset threshold.

8. The conversion and recycling system based on photovoltaic power generation and pumped storage in high-rise buildings according to claim 7 is characterized in that: The system also includes a first water level monitoring device arranged on the upper water pool and a second water level monitoring device arranged on the lower water pool, which monitor the water levels of the upper water pool and the lower water pool in real time, send detection signals to the water volume adjustment module of the water pool, and cooperate with the module to adjust the water volume of the two water pools.

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