A tower type photo-thermal power generation coupling system based on vanadium redox flow battery energy storage

Abstract

The application discloses a tower type photo-thermal power generation coupling system based on a full vanadium liquid flow battery energy storage, which comprises a photo-thermal power generation part and an energy storage power station part, wherein the photo-thermal power generation part comprises a photo-thermal assembly, a heat transfer assembly, a steam generator and a steam power generation assembly, and the energy storage power station part comprises a positive electrolyte storage tank, a negative electrolyte storage tank, a positive input pipeline, a negative input pipeline and a working electric pile; the double power supply design is adopted, the photo-thermal power generation supply is mainly used, the power grid supply is used as a supplement when the photo-thermal power generation does not work at night, and the power supply reliability is increased; the photo-thermal power generation system is arranged around the energy storage power station, the ambient temperature around the energy storage power station can be reduced, the operation frequency of the refrigeration equipment of the energy storage power station can be reduced in summer, and the system power consumption is reduced; if power failure occurs due to extremely cold weather, the heating working medium of the photo-thermal power generation system can provide a heat preservation supplement to the electrolyte storage tank of the energy storage power station through the pipeline, and the continuous operation of the energy storage power station is ensured.

Description

Technical Field

[0001] This invention relates to the field of mobile communications, and more specifically to a tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage. Background Technology

[0002] The current power supply method for factories is mainly based on a single power grid, which lacks stability and reliability. Therefore, in order to ensure normal production and prevent interference from power grid fluctuations, backup power supplies or energy storage stations are generally set up for unforeseen needs.

[0003] However, backup power supplies or energy storage stations generally only serve as backup energy sources. When they are not in operation, they still require resources to maintain and care for them, which is a great waste. Summary of the Invention

[0004] The purpose of this invention is to provide a tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage. It employs a dual-power supply design, with solar thermal power generation as the primary source and grid power as a supplement during nighttime or when solar thermal power generation is not operating, thus increasing power supply reliability. Deploying the solar thermal power generation system around the energy storage power station can lower the ambient temperature, reducing the operating frequency of the cooling equipment in summer and lowering system power consumption. In the event of a power outage due to extreme cold, the heating medium of the solar thermal power generation system can provide insulation and replenishment to the electrolyte storage tank of the energy storage power station through pipelines, ensuring the continuous operation of the energy storage power station.

[0005] A tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage includes a solar thermal power generation section and an energy storage power station section. The solar thermal power generation section includes a solar thermal module, a heat transfer module, a steam generator, and a steam power generation module. The solar thermal module is connected to the steam generator through the heat transfer module. The steam generator is connected to the steam power generation module through a steam pipe. The steam power generation module is connected to the power grid through a main circuit.

[0006] The energy storage power station includes a positive electrolyte storage tank, a negative electrolyte storage tank, a positive input pipe, a negative input pipe, and a working stack. The positive electrolyte storage tank and the negative electrolyte storage tank are connected to the working stack through the positive input pipe and the negative input pipe, respectively. The working stack is connected to the main circuit through an input-output circuit.

[0007] Preferably, the photothermal component includes a photothermal array and a heat absorber. The photothermal array reflects solar energy into the heat absorber to heat the working fluid therein. The heat transfer component includes a hot working fluid transfer pipe and a cold working fluid transfer pipe. The hot working fluid transfer pipe and the cold working fluid transfer pipe are respectively equipped with a hot salt tank and a cold salt tank, and the outlet pipes of the hot salt tank and the cold salt tank are respectively equipped with a high-temperature pump and a low-temperature pump.

[0008] Preferably, the working medium is a mixture of potassium nitrate and sodium nitrate.

[0009] Preferably, the steam power generation unit is connected to a condenser pipe, which is wound around the positive electrolyte storage tank and the negative electrolyte storage tank, and finally connected to the deaerator. The deaerator is then connected to the steam generator through a feed water pump.

[0010] Preferably, the working stack is also connected to the positive electrolyte storage tank and the negative electrolyte storage tank through the positive electrode circuit and the negative electrode circuit, respectively.

[0011] Preferably, the positive input pipe and the negative input pipe are further provided with a positive pump and a negative pump, respectively.

[0012] Preferably, the condenser pipe is also equipped with a condensate pump and multiple valves.

[0013] The advantages of this invention are as follows: It employs a dual-power design, primarily using concentrated solar power (CSP) for power supply, with grid power as a supplement during nighttime hours or when CSP is not operating, thus increasing power supply reliability. Deploying CSP systems around the energy storage power station can lower the ambient temperature, reducing the operating frequency of the station's cooling equipment in summer and lowering system power consumption. In the event of a power outage due to extreme cold, the heating medium from the CSP system can provide insulation and replenishment to the electrolyte storage tank of the energy storage power station through pipelines, ensuring continuous operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the structural principle of the present invention;

[0015] Figure 2 This is a schematic diagram of the energy storage power station section of the present invention; Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0017] like Figures 1 to 2 As shown, the present invention includes a solar thermal power generation section and an energy storage power station section. The solar thermal power generation section includes a solar thermal module, a heat transfer module, a steam generator, and a steam power generation module. The solar thermal module is connected to the steam generator through the heat transfer module. The steam generator is connected to the steam power generation module through a steam pipe. The steam power generation module is connected to the power grid through the main circuit.

[0018] The energy storage power station includes a positive electrolyte storage tank, a negative electrolyte storage tank, a positive input pipe, a negative input pipe, and a working stack. The positive electrolyte storage tank and the negative electrolyte storage tank are connected to the working stack through the positive input pipe and the negative input pipe, respectively. The working stack is connected to the main circuit through an input-output circuit.

[0019] The photothermal component includes a photothermal array and a heat absorber. The photothermal array reflects solar energy into the heat absorber to heat the working fluid therein. The heat transfer component includes a hot working fluid transfer pipe and a cold working fluid transfer pipe. A hot salt tank and a cold salt tank are respectively installed on the hot and cold working fluid transfer pipes, and a high-temperature pump and a low-temperature pump are respectively installed on the outlet pipes of the hot and cold salt tanks. The working fluid is a mixture of potassium nitrate and sodium nitrate.

[0020] The optimal operating state is constant power output: In the early stage of solar thermal power generation, the vanadium redox flow battery energy storage station works synchronously to ensure constant output power. As the solar thermal power generation power gradually increases, the discharge power of the energy storage station gradually decreases and gradually switches from discharge mode to charging mode. When the solar thermal power generation power decreases, the energy storage station switches to discharge mode to maintain constant power until it is completely discharged, and then charges at night.

[0021] The steam power generation unit is connected to a condenser pipe, which is wound around the positive and negative electrolyte storage tanks and ultimately connected to a deaerator. The deaerator is then connected to the steam generator via a feedwater pump. The condenser pipe is also equipped with a condensate pump and multiple valves.

[0022] 2. In the event of excessively low temperatures at the energy storage power station, the hot water from the condenser can be used to heat the positive and negative electrolyte tanks by controlling the valves.

[0023] The working stack is also connected to the positive electrolyte storage tank and the negative electrolyte storage tank through the positive circuit and the negative circuit, respectively.

[0024] The positive input pipe and the negative input pipe are also equipped with a positive pump and a negative pump, respectively.

[0025] Detailed implementation methods and principles:

[0026] A solar thermal + energy storage system is formed by coupling a vanadium redox flow battery energy storage system with a solar thermal power generation system, which has three operating states:

[0027] Under normal circumstances, a concentrated solar power (CSP) plant operates by reflecting solar energy through a solar thermal array onto a receiver to heat a working fluid (typically a mixture of potassium nitrate and sodium nitrate). This heated fluid is then stored in a hot salt tank via pipelines. When power generation is needed, the fluid enters a steam generator to heat water in the pipes, producing high-temperature steam that drives a steam engine to generate electricity. After releasing its heat, the working fluid returns to the cold salt tank through pipelines for the next working cycle. CSP solves the problem of self-consumption electricity for energy storage power plants, but the generated electricity is directly fed into the power grid. The energy storage power plant stores electricity through the grid at night and releases it during the day.

[0028] In the event of power curtailment or outage, the electricity generated by the solar thermal power plant charges the energy storage station, ensuring the continuous and uninterrupted operation of the entire system. Especially in low-temperature conditions, the system provides heating and insulation to the electrolyte in the energy storage station via pipelines, preventing the electrolyte from freezing and damaging the fuel cell stack.

[0029] The coupled system of concentrated solar power (CSP) and vanadium redox flow battery (vanadium redox flow battery) can leverage the continuous and stable characteristics of CSP and the long-term energy storage effect of vanadium redox flow battery, while simultaneously solving the following pain points:

[0030] Vanadium redox flow battery energy storage power stations can leverage their long-term storage capabilities to address the issue of solar power curtailment. The condensate from solar thermal power generation can be used as insulation for the vanadium redox flow battery storage tank at lower temperatures by controlling valves. In the event of a power outage, solar thermal power generation can continuously supply power to the vanadium redox flow battery energy storage power station. The heat absorption principle of solar thermal power generation can be considered as external physical cooling for the energy storage power station.

[0031] Based on the above, this invention adopts a dual-power supply design, with concentrated solar power (CSP) as the primary power source and grid power as a supplement during nighttime or when CSP is not operating, thus increasing power supply reliability. Deploying a CSP system around the energy storage power station can lower the ambient temperature around the station, reducing the operating frequency of the cooling equipment in summer and lowering system power consumption. In the event of a power outage due to extreme cold, the heating medium from the CSP system can provide insulation and replenishment to the electrolyte storage tank of the energy storage power station through pipelines, ensuring continuous operation of the energy storage power station.

[0032] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage, characterized in that, It includes a solar thermal power generation section and an energy storage power station section. The solar thermal power generation section includes a solar thermal module, a heat transfer module, a steam generator, and a steam power generation module. The solar thermal module is connected to the steam generator through the heat transfer module. The steam generator is connected to the steam power generation module through a steam pipe. The steam power generation module is connected to the power grid through the main circuit. The energy storage power station includes a positive electrolyte storage tank, a negative electrolyte storage tank, a positive input pipe, a negative input pipe, and a working stack. The positive electrolyte storage tank and the negative electrolyte storage tank are connected to the working stack through the positive input pipe and the negative input pipe, respectively. The working stack is connected to the main circuit through an input-output circuit. The photothermal component includes a photothermal array and a heat absorber. The photothermal array reflects solar energy into the heat absorber to heat the working fluid therein. The heat transfer component includes a hot working fluid transfer pipe and a cold working fluid transfer pipe. The hot working fluid transfer pipe and the cold working fluid transfer pipe are respectively equipped with a hot salt tank and a cold salt tank, and the outlet pipes of the hot salt tank and the cold salt tank are respectively equipped with a high-temperature pump and a low-temperature pump. The steam power generation unit is connected to a condenser pipe, which is wound around the positive electrolyte storage tank and the negative electrolyte storage tank, and finally connected to the deaerator. The deaerator is then connected to the steam generator through a feed water pump.

2. A tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage according to claim 1, characterized in that: The working medium is a mixture of potassium nitrate and sodium nitrate.

3. A tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage according to claim 1, characterized in that: The working stack is also connected to the positive electrolyte storage tank and the negative electrolyte storage tank through the positive circuit and the negative circuit, respectively.

4. A tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage according to claim 1, characterized in that: The positive input pipe and the negative input pipe are also equipped with a positive pump and a negative pump, respectively.

5. A tower-type solar thermal power generation coupling system based on vanadium redox flow battery energy storage according to claim 1, characterized in that: The condenser pipe is also equipped with a condensate pump and multiple valves.

Images