Solar air energy large capacity long cycle energy storage peak shaving power station system project

Abstract

The utility model discloses a solar air energy large capacity long -term energy storage peak shaving power station system engineering belongs to new energy comprehensive utilization technical field. This system integrates photovoltaic power generation, air source heat pump and water source heat pump superposition heat collection, giant buried vacuum heat preservation energy storage library, modern agricultural planting and intelligent control module, and constructs the comprehensive energy system of multiple complementary, intelligent regulation and control. Realize cross -season heat storage through underground energy storage library, and reduce heat loss in combination with vacuum heat preservation and natural stratification design; Photovoltaic power priority drives heat pump, realizes " self -generation self -use + valley electricity net ";Winter heating, summer cooling collaborative operation, and recovery refrigeration waste heat;The top of energy storage library constructs organic vegetable botanical garden, realizes " one ground three uses ". The utility model effectively solve photovoltaic power generation fluctuation, air source heat pump low temperature efficiency is low, and the problem such as high carbon emission of heating, improve energy utilization efficiency, reduce energy storage cost, and help low -carbon transformation.

Description

Technical Field

[0001] This utility model belongs to the field of new energy comprehensive utilization technology, specifically relating to a solar air energy large-capacity long-cycle energy storage and peak-shaving power station system engineering. Background Technology

[0002] With profound changes in the global energy structure and increasing pressure on ecological and environmental protection, renewable energy sources, represented by solar and air source heat pumps, have become an important development direction to replace traditional fossil fuels due to their cleanliness, sustainability, and widespread distribution. However, in practical applications, solar power generation suffers from significant uncertainties and intermittency, leading to large fluctuations in power output and difficulties in grid connection. Air source heat pumps experience a significant decrease in operating efficiency and a low COP value in low-temperature environments, hindering their widespread application in cold regions. Furthermore, renewable energy power plants commonly suffer from "curtailment" of solar and wind power, resulting in resource waste and further exacerbating the instability and economic problems of the energy system.

[0003] Currently, winter heating in northern my country and hot-summer, cold-winter regions still mainly relies on coal-fired or gas-fired boilers. The high carbon emission intensity and severe environmental pollution during the heating process have become a key bottleneck restricting regional air quality improvement and green, low-carbon transformation. Although water source heat pump systems have a high energy efficiency ratio (COP) of around 5.0, their large-scale application is limited by groundwater resources. Meanwhile, conventional energy storage methods such as electrochemical energy storage, compressed air energy storage, and hydrogen production energy storage are costly and lack technological maturity, restricting their application in the field of district heating.

[0004] To achieve efficient utilization of renewable energy and flexible regulation of the energy system, there is an urgent need to develop a technological solution capable of long-term, large-capacity, and low-cost energy storage to address the following key issues:

[0005] 1. How to effectively mitigate the volatility of photovoltaic power generation and improve its local consumption rate and peak-shaving capacity.

[0006] 2. How to overcome the operational limitations of air source heat pumps in low-temperature environments and improve their average annual energy efficiency.

[0007] 3. How to construct an integrated energy system with cross-seasonal energy storage capabilities to achieve "summer storage for winter use + winter storage for summer use" of clean energy.

[0008] 4. How to achieve integrated and coordinated operation of heating, cooling, agricultural planting and power generation functions through multi-energy complementarity and intelligent scheduling.

[0009] 5. How to reduce the construction and operation and maintenance costs of energy storage systems to make them economically feasible for large-scale promotion.

[0010] To address the aforementioned issues, scholars both domestically and internationally have conducted extensive research on thermal energy storage technology in recent years. Hot water energy storage, as a physical energy storage method, offers advantages such as moderate energy density, low cost, and high safety, making it particularly suitable for regional centralized energy supply scenarios. However, existing hot water energy storage systems generally lack efficient insulation structure design and layered management mechanisms, resulting in significant heat loss and low system efficiency, making it difficult to meet the demands of long-term, large-capacity energy storage.

[0011] Therefore, there is an urgent need to develop a new integrated energy system that combines photovoltaic power generation, air source and water source heat pump operation, underground vacuum insulated energy storage, intelligent centralized control system and modern agricultural planting. This system has important practical significance and broad application prospects for promoting the replacement of traditional fossil energy with clean energy and achieving low-carbon transformation. Utility Model Content

[0012] To address the aforementioned issues, this utility model proposes a large-capacity, long-cycle solar air-source energy storage and peak-shaving power station system. This system integrates multiple collaborative engineering modules, including a solar photovoltaic power generation system, an air-source heat pump and a water-source heat pump cascade heat collection system, a giant underground vacuum insulated energy storage system, and a modern agricultural planting system, to construct a comprehensive energy system with cross-seasonal energy storage capacity, multi-energy complementarity, and intelligent regulation.

[0013] The technical solution adopted in this utility model is as follows:

[0014] The solar-air-source large-capacity long-cycle energy storage and peak-shaving power station system project includes a solar photovoltaic power generation system, an air-source heat pump and water-source heat pump cascade heat collection system, a giant underground vacuum insulated energy storage system, and a modern agricultural planting system.

[0015] The giant underground vacuum thermal insulation energy storage system includes a giant underground vacuum thermal insulation energy storage tank, which is buried underground. The giant underground vacuum thermal insulation energy storage tank adopts a steel-concrete tank wall with a vacuum insulation structure. Its interior stores liquid heat storage medium, and a water pipeline assembly connected to an air source heat pump and a water source heat pump cascade heat collection system, a residential heating system, and a residential cooling system is installed in the giant underground vacuum thermal insulation energy storage tank.

[0016] The modern agricultural planting system includes an organic vegetable garden located above the ground of a giant underground vacuum insulated energy storage warehouse. The organic vegetable garden is a greenhouse structure built on a steel-concrete cover plate using a standard steel frame and solar photovoltaic modules.

[0017] The solar photovoltaic power generation system includes solar photovoltaic modules built on the walls and roof of the organic vegetable botanical garden. The solar photovoltaic modules are connected to the AC combiner cabinet through a grid-connected inverter. The AC combiner cabinet and the mains power grid are connected to the distribution cabinet through a two-way smart meter. The distribution cabinet supplies power to the air source heat pump and water source heat pump cascade heat collection system, the giant underground vacuum heat storage system, and the modern agricultural planting system. The distribution cabinet is remotely controlled by the intelligent control center.

[0018] The air source heat pump and water source heat pump superimposed heat collection system includes an air source heat pump system and a water source heat pump system built on a giant underground vacuum insulated energy storage facility and an organic vegetable botanical garden. The air source heat pump system and the water source heat pump system are respectively connected to the water supply pipeline components of the giant underground vacuum insulated energy storage facility system, and are also connected to the solar photovoltaic power generation system and the power grid, and remotely controlled by the intelligent control center.

[0019] Furthermore, the interior of the giant underground vacuum thermal energy storage tank is configured with an interconnected upper thermal storage area, a middle thermal storage area, and a caisson thermal storage area from top to bottom. The upper thermal storage area, the middle thermal storage area, and the caisson thermal storage area store liquid thermal storage media at different temperatures respectively.

[0020] The upper thermal storage area is enclosed by a reinforced concrete cover plate, a reinforced concrete tank wall A with an embedded vacuum insulation layer, and a reinforced concrete ceramsite bottom plate; the middle thermal storage area is enclosed by a reinforced concrete ceramsite bottom plate, a reinforced concrete tank wall B with an embedded vacuum insulation layer, and a reinforced concrete bottom plate; the caisson thermal storage area is enclosed by a reinforced concrete bottom plate, a caisson reinforced concrete wall with an embedded caisson vacuum insulation layer, and a caisson reinforced concrete bottom plate.

[0021] Furthermore, the giant underground vacuum insulated energy storage tank is also equipped with an energy storage tank retaining wall inside. The two sides of the energy storage tank retaining wall are connected to the reinforced concrete tank wall A, the reinforced concrete ceramsite base plate, and the reinforced concrete tank wall B. The energy storage tank retaining wall divides the interior of the tank into a smaller high-grade energy storage tank and a larger energy storage tank. The upper part of the heating tank is connected to the upper heat storage area of ​​the energy storage tank, and the lower part of the heating tank is connected to the middle heat storage area of ​​the energy storage tank.

[0022] Furthermore, the water supply pipeline assemblies for the upper heat storage area, the middle heat storage area, and the caisson heat storage area are respectively set at three horizontal heights, and each water supply pipeline assembly includes several sets of water supply pipelines and several sets of return water pipelines.

[0023] The water supply pipeline connected to the air source heat pump system extends to the bottom of the caisson heat storage area of ​​the energy storage tank, and the return water pipeline connected to the air source heat pump system extends to the middle heat storage area of ​​the energy storage tank.

[0024] The water supply pipeline connected to the cooling system extends to the bottom of the caisson thermal storage area of ​​the energy storage tank, and the return water pipeline connected to the cooling system extends to the upper thermal storage area of ​​the energy storage tank.

[0025] The water supply pipeline connected to the water source heat pump system extends to the middle heat storage area of ​​the energy storage tank, and the return water pipeline connected to the water source heat pump system extends to the upper heat storage area of ​​the energy storage tank.

[0026] The water supply pipeline connected to the heating system extends to the upper heat storage area of ​​the heating warehouse, and the return water pipeline connected to the heating system extends to the middle heat storage area of ​​the energy storage warehouse.

[0027] Water distributors are installed at the ends of each water supply and return pipeline.

[0028] Furthermore, the steel-concrete ceramsite base plate is set at a 45° inclination angle; the bottom of the caisson steel-concrete wall is provided with a caisson cutting edge; a steel-concrete support is installed on the steel-concrete silo wall A, and the steel-concrete cover plate is fixedly installed on the top of the steel-concrete silo wall A through the steel-concrete support.

[0029] Furthermore, the vertical cross-section of the giant underground vacuum thermal energy storage facility is square, rectangular, trapezoidal, or circular.

[0030] Furthermore, the intelligent control center consists of several industrial computers that are remotely connected to the power distribution cabinet, air source heat pump system, and water source heat pump system via the Internet.

[0031] Furthermore, the roof and south facade of the organic vegetable botanical garden are covered with monocrystalline solar photovoltaic modules, while the east and west sides use low-light solar photovoltaic modules as wall structures, and the north side uses an air source heat pump system and power distribution equipment as the enclosure wall, forming an enclosed greenhouse structure.

[0032] The beneficial effects of this utility model are:

[0033] The beneficial effects of this large-capacity, long-cycle solar-air energy storage and peak-shaving power station system are mainly reflected in the following aspects:

[0034] 1. High-efficiency insulation and low heat loss: The giant underground vacuum insulated energy storage facility uses steel-concrete walls and covers with vacuum insulation layers, significantly improving the insulation performance of the thermal storage system. This design effectively reduces heat loss, extends the storage time, meets cross-seasonal energy storage needs, and thus improves the overall energy utilization efficiency of the system.

[0035] 2. Modular Zoned Thermal Storage Design: The giant underground vacuum insulated energy storage facility consists of an upper thermal storage zone, a middle thermal storage zone, and a caisson thermal storage zone. Each zone stores liquid thermal storage media at different temperatures and is separated into energy storage and heating zones by a retaining wall. This modular design optimizes the storage of the thermal storage media, improves the flexibility of thermal storage and extraction, and meets the needs of different application scenarios.

[0036] 3. Multi-energy complementarity and intelligent control: The overall system engineering integrates multiple energy forms such as solar photovoltaic power generation, air source heat pump system, and water source heat pump system, and realizes remote control and coordinated operation through intelligent central control. The water pipeline components connect to different heat pump systems, heating systems, cooling systems, etc. according to needs, ensuring efficient energy conversion and distribution, and improving the overall energy utilization efficiency.

[0037] 4. Energy conservation, environmental protection, and low carbon emissions: Replacing traditional coal-fired or gas-fired boilers with photovoltaic power generation and clean energy heating significantly reduces carbon emissions and environmental pollution. Simultaneously, the overall system engineering fully utilizes the geothermal advantages of underground energy storage facilities to reduce heat pump operating energy consumption, further enhancing environmental benefits.

[0038] 5. Space Utilization and Multifunctional Integration: The giant underground vacuum-insulated energy storage system is combined with a modern agricultural planting system, while an organic vegetable garden greenhouse is built above ground, realizing the three-dimensional utilization of land resources. The photovoltaic module roof and wall enclosure design not only provide a suitable environment for agricultural planting, but also realize the organic integration of photovoltaic power generation and agricultural production, resulting in significant economic and social benefits.

[0039] 6. Long-cycle, large-capacity energy storage capacity: The structural design of the giant underground vacuum insulated energy storage facility supports large-scale thermal storage, and its vertical cross-section can be flexibly adjusted according to actual needs. This design enables it to have long-cycle, large-capacity energy storage capacity, realizing "summer storage for winter use + winter storage for summer use" of clean energy, providing a reliable guarantee for energy peak shaving.

[0040] 7. Stability and Safety: The giant underground vacuum insulated energy storage facility adopts a steel-concrete structure with an embedded vacuum insulation layer, possessing excellent mechanical strength and compressive resistance, enabling long-term stable operation. The inclined steel-concrete ceramsite base plate and the caisson cutting edge design further enhance structural stability and reduce safety hazards during construction and operation.

[0041] 8. Economic feasibility and promotional value

[0042] The system engineering adopts low-cost thermal storage media and physical energy storage methods, which significantly reduces construction and operation and maintenance costs and has economic feasibility for large-scale promotion and application, especially suitable for centralized heating scenarios in northern and cold regions.

[0043] In summary, this system engineering achieves multiple advantages in structural design, including high-efficiency insulation, modular zoning, multi-energy complementarity, low carbon and environmental protection, and intensive space utilization, providing an innovative solution for building a sustainable integrated energy system. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a block diagram of the structure of the solar air energy large-capacity long-cycle energy storage and peak-shaving power station system of this utility model;

[0046] Figure 2 This is a side sectional view of the structure of the giant underground vacuum thermal insulation energy storage tank of this utility model;

[0047] Figure 3 This is a top sectional view of the structure of the giant underground vacuum thermal insulation energy storage tank of this utility model;

[0048] Figure 4 This is a schematic diagram illustrating the principle of the dynamic circulation mechanism of this utility model;

[0049] Figure 5 A schematic diagram illustrating the natural circulation flow pattern of the energy storage reservoir retaining wall in this utility model;

[0050] In the diagram, 1 – Upper thermal storage area, 2 – Middle thermal storage area, 3 – Caisson thermal storage area, 4 – Reinforced concrete cover plate, 5 – Reinforced concrete silo wall A, 6 – Reinforced concrete ceramsite bottom plate, 7 – Reinforced concrete silo wall B, 8 – Reinforced concrete bottom plate, 9 – Caisson reinforced concrete wall, 10 – Caisson reinforced concrete bottom plate, 11 – Energy storage silo retaining wall, 12 – Heating silo, 13 – Energy storage silo, 14 – Water supply pipeline connected to the air source heat pump system, 15 – Return water pipeline connected to the air source heat pump system, 16 – Water supply pipeline connected to the water source heat pump system, 17 – Water supply pipeline connected to the water source heat pump system. 18 – Return water pipe connected to the heat pump system; 19 – Water supply pipe connected to the heating system; 20 – Return water pipe connected to the heating system; 21 – Water supply pipe connected to the cooling system; 22 – Water distributor; 23 – Vacuum insulation layer A; 24 – Vacuum insulation layer B; 25 – Vacuum insulation layer of the caisson; 26 – Vacuum extraction pipe; 27 – Caisson cutting edge; 28 – Steel-concrete support; 29 – Organic vegetable botanical garden; 30 – Standard steel frame; 31 – Solar photovoltaic module. Detailed Implementation

[0051] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] This embodiment provides a large-capacity, long-cycle solar-air energy storage and peak-shaving power station system engineering project, such as... Figure 1 As shown, the system integrates multiple collaborative engineering modules, including a solar photovoltaic power generation system, an air source heat pump and a water source heat pump cascade heat collection system, a giant underground vacuum insulated energy storage system, and a modern agricultural planting system. It constructs a comprehensive energy system with cross-seasonal energy storage capacity, multi-energy complementarity, and remote control, in order to achieve efficient, stable, and low-cost utilization of clean energy.

[0053] The following provides a detailed description of each subsystem of this large-capacity, long-cycle solar-air energy storage peak-shaving power station system:

[0054] Giant underground vacuum thermal insulation energy storage system:

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, the giant underground vacuum thermal energy storage system includes a giant underground vacuum thermal energy storage tank. Inside the tank, there are interconnected upper thermal storage zone 1, middle thermal storage zone 2 and caisson thermal storage zone 3 arranged from top to bottom. The upper thermal storage zone 1, middle thermal storage zone 2 and caisson thermal storage zone 3 store liquid thermal storage media at different temperatures.

[0056] The upper thermal storage zone 1 is enclosed by a reinforced concrete cover plate 4, a reinforced concrete wall A5 with a vacuum insulation structure, and a reinforced concrete ceramsite base plate 6. The reinforced concrete wall A5 is made of reinforced concrete; a vacuum insulation layer A23 is embedded within the wall, and a vacuum extraction pipe 26 is installed on the wall, connected to the vacuum insulation layer A23 to maintain the vacuum level. Reinforced concrete supports 28 are installed on the wall A5, and the reinforced concrete cover plate 4 is fixedly installed on top of the wall via these supports. The reinforced concrete ceramsite base plate 6 is a 45° inclined reinforced concrete structure with embedded ceramsite material to enhance the insulation performance of the base plate. The 45° inclination eliminates dead zones in the water flow of the middle thermal storage zone 2.

[0057] The central thermal storage zone 2 is enclosed by a reinforced concrete ceramsite base slab 6, a reinforced concrete storage wall B7 with a vacuum insulation structure, and a reinforced concrete base slab 8. The reinforced concrete storage wall B7 and the reinforced concrete base slab 8 are made of reinforced concrete. The reinforced concrete storage wall B7 has an embedded vacuum insulation layer B24, and a vacuum extraction pipe 26 is installed on the reinforced concrete storage wall B7. The vacuum extraction pipe 26 is connected to the vacuum insulation layer B24 to maintain the vacuum level.

[0058] The caisson thermal storage zone 3 is enclosed by a reinforced concrete base slab 8, a caisson reinforced concrete wall 9 with a vacuum insulation structure, and a caisson reinforced concrete base slab 10. The caisson reinforced concrete wall 9 and the caisson reinforced concrete base slab 10 are made of reinforced concrete. A caisson vacuum insulation layer 25 is embedded within the caisson reinforced concrete wall 9, and a vacuum extraction pipe 26 is installed on the caisson reinforced concrete wall 9, which is connected to the caisson vacuum insulation layer 25 to maintain the vacuum level. A caisson cutting edge 27 is provided at the bottom of the caisson reinforced concrete wall 9, and the caisson cutting edge 27 is made of high-strength reinforced concrete.

[0059] like Figure 1 and Figure 2 As shown, in this embodiment, the upper thermal storage area 1 and the middle thermal storage area 2 adopt a trapezoidal structure. The top of the upper thermal storage area 1 is sealed at the ground surface by a reinforced concrete cover plate 4, and the bottom is connected to the middle thermal storage area 2. The caisson thermal storage area 3 below the middle thermal storage area 2 is a circular caisson structure, and the bottom of the middle thermal storage area 2 is connected to the caisson thermal storage area 3. The bottom of the caisson reinforced concrete wall 9 is circumferentially provided with caisson cutting feet 27. Relying on the self-weight of the caisson reinforced concrete wall 9, it is excavated from the inside and cuts the soil to sink to the caisson reinforced concrete bottom plate 10, thus sealing the entire giant underground vacuum thermal insulation energy storage tank. Of course, this giant underground vacuum thermal insulation energy storage tank can also be designed with other shapes such as square, rectangular, trapezoidal, and circular vertical cross-sections according to actual engineering and geological conditions.

[0060] Furthermore, such as Figure 2 As shown, the giant underground vacuum insulated energy storage facility in this embodiment is also equipped with an energy storage retaining wall 11. The two sides of the energy storage retaining wall 11 are connected to the reinforced concrete storage wall A5, the reinforced concrete ceramsite base plate 6, and the reinforced concrete storage wall B7. The energy storage retaining wall 11 divides the interior of the storage facility into a heating storage room 12 and an energy storage room 13. The storage capacity ratio of the heating storage room 12 to the energy storage room 13 is as follows: the heating storage room 12 accounts for 30% of the total storage capacity, and the energy storage room 13 accounts for 70% of the total storage capacity. The upper part of the heating storage room 12 is connected to the upper heat storage area 1 of the energy storage room 13, and the lower part of the heating storage room 12 is connected to the middle heat storage area 2 of the energy storage room 13.

[0061] Based on the above description of the structure of the giant underground vacuum insulated energy storage facility, this facility utilizes reinforced concrete walls and a reinforced concrete ceramsite base with insulation, combined with a vacuum system that uses vacuum pipes 26 to control the vacuum level of each vacuum insulation layer in real time. Furthermore, the 45° inclination of the reinforced concrete ceramsite base 6 eliminates dead zones for water flow. These features enable this giant underground vacuum insulated energy storage facility to achieve a lower average annual heat loss rate and be more energy-efficient compared to traditional thermal storage facilities and hot water tanks. In addition, because this giant underground vacuum insulated energy storage facility uses a reinforced concrete structure with embedded vacuum insulation layers, its insulation layer has a longer lifespan, better corrosion resistance, and lower maintenance costs compared to traditional thermal storage facilities and hot water tanks.

[0062] Air source heat pump and water source heat pump cascade heat collection system:

[0063] Because the aforementioned giant underground vacuum insulated energy storage system does not have the ability to heat the stored heat medium itself, it needs to be used in conjunction with an air-source heat pump and a water-source heat pump cascade heat collection system. In this embodiment, the air-source heat pump and water-source heat pump cascade heat collection system includes an air-source heat pump system and a water-source heat pump system. Meanwhile, as... Figure 2 As shown, the giant underground vacuum insulated energy storage facility is also equipped with a layered water pipeline distribution system to work with the air source heat pump system and the water source heat pump system to achieve heating and cooling functions.

[0064] The giant underground vacuum insulated energy storage system, in conjunction with the air-source heat pump and water-source heat pump cascade collection system, can achieve a dynamic circulation mechanism for the stratified distribution system. The dynamic circulation mechanism of the stratified distribution system: through the synergistic action of multiple sets of water supply pipelines at three horizontal levels and the water distributor 22, the giant underground vacuum insulated energy storage system can achieve natural stratification and efficient circulation of the heat storage medium. Taking water, a low-cost and technologically mature liquid heat storage medium, as an example, the water supply pipeline 16 connected to the water-source heat pump system pumps water from the middle heat storage zone 2, heats it to 60–80°C, and then discharges it back to the upper heat storage zone 1 through the return water pipeline 17 connected to the water-source heat pump system; the water supply pipeline 14 connected to the air-source heat pump system pumps water from the well area, heats it to 40–60°C, and then discharges it back to the middle heat storage zone 2 through the return water pipeline 15 connected to the air-source heat pump system.

[0065] In addition, such as Figure 4 As shown by the middle arrow, due to the lower density of high-temperature water and the higher density of low-temperature water, this density difference will trigger a buoyancy effect, causing high-temperature water to float naturally due to its lower density and low-temperature water to sink naturally due to its higher density, forming the first type of natural circulation flow. Thus, the upper thermal storage zone 1 stores high-temperature media at 60–80℃, the middle thermal storage zone 2 stores medium-temperature media at 40–60℃, and the caisson thermal storage zone 3 stores low-temperature media at 7–40℃.

[0066] The giant underground vacuum insulated energy storage facility, through its temperature zoning, 45° inclined steel-concrete ceramsite base plate 6, and water distributor 22, avoids heat stagnation and dead zones, maximizing the use of natural convection to achieve efficient stratification and stable circulation of the heat storage medium. This solves the problems of high energy consumption and low stratification efficiency in traditional technologies. Simultaneously, the air-source heat pump and water-source heat pump cascade collection system, based on the structure of the giant underground vacuum insulated energy storage facility, solves the problem of poor heat pump energy efficiency. This passive circulation mechanism generated by density differences not only saves energy and reduces consumption but also significantly improves the stability and economy of cross-seasonal energy supply.

[0067] Furthermore, to ensure a stable supply of high-temperature heating media during the heating season, such as Figure 5As indicated by the middle arrow, the energy storage retaining wall 11 within this giant underground vacuum insulated energy storage facility plays a crucial role. During the heating season, the heating system, water source heat pump system, and air source heat pump system operate simultaneously. The water supply pipeline 18, connected to the heating system, works in conjunction with the heating system to draw 60–80°C high-temperature water from the top of the heating storage facility 12 for heating. Simultaneously, the high-temperature medium from the upper heat storage zone 1 of the energy storage facility 13 is automatically replenished to the heating storage facility 12. At the same time, the water supply pipeline 16, connected to the water source heat pump system, works in conjunction with the water source heat pump system to draw 40–60°C medium-temperature water from the middle heat storage zone 2 of the energy storage facility 13. Meanwhile, the medium-temperature medium from the bottom of the heating storage facility 12 flows back to the energy storage facility 13, thus forming a second form of natural circulation, ensuring a stable supply of high-temperature medium and replenishment of return water during the heating season.

[0068] Dual-storage (hot and cold) mode: Before the heating season, the giant underground vacuum insulated energy storage facility operates in cascade mode using a water source heat pump system and an air source heat pump system, raising the temperature of the stored heat medium from 7°C to 80°C. During the heating season, the heating system, water source heat pump system, and air source heat pump system operate simultaneously to ensure a stable supply of high-temperature heat medium.

[0069] As the heating season draws to a close, the water supply pipeline 16, connected to the water source heat pump system, draws in the heat storage medium. Simultaneously, the water source heat pump system reverses its operation, cooling the heat storage medium from 80°C to 7°C. At this time, the water supply pipeline 20, connected to the cooling system, can work with the cooling system to draw in the low-temperature heat storage medium from the well-type heat storage area, providing cooling for hot-summer, cold-winter regions during the summer. The cooling heat storage medium is returned to the upper heat storage area 1 via the return water pipeline 21, connected to the cooling system. After absorbing heat, the density of the low-temperature heat storage medium changes, causing it to float upwards, thus recovering waste heat from the cooling cycle and storing energy, achieving year-round recycling.

[0070] Modern agricultural planting systems:

[0071] Taking a giant underground vacuum-insulated energy storage facility with a single storage capacity of 1 million cubic meters as an example, its overall dimensions are 200 meters long × 200 meters wide × 40 meters high. Since the main structure of this giant underground vacuum-insulated energy storage facility is buried underground, approximately 60 acres of usable land are left above ground. To improve the efficiency of comprehensive land use, this embodiment sets up an organic vegetable garden above the reinforced concrete cover of the energy storage facility. For example... Figure 2 As shown, the organic vegetable botanical garden 29 is supported by a standard steel frame 30 and combined with solar photovoltaic modules 31 to construct a greenhouse structure. The top and south facade of the organic vegetable botanical garden 29 are covered with monocrystalline solar photovoltaic modules, while the east and west sides use low-light solar photovoltaic modules as wall structures. The north side uses an air-source heat pump system, power distribution equipment, and other engineering facilities as the enclosure wall, forming a closed greenhouse structure.

[0072] The organic vegetable botanical garden 29 not only achieves the organic integration of agricultural planting and energy facilities, but also effectively utilizes the waste heat resources on the back of the solar photovoltaic modules 31, providing a stable growing environment for the botanical garden and significantly improving land utilization and energy efficiency.

[0073] Solar photovoltaic power generation system:

[0074] Furthermore, considering the power supply issues of the organic vegetable botanical garden 29 and the air-source heat pump and water-source heat pump systems, a solar photovoltaic power generation system is also installed in this implementation. Simultaneously, to further improve the comprehensive land utilization efficiency, the solar photovoltaic power generation system includes the aforementioned low-light solar photovoltaic modules and monocrystalline solar photovoltaic modules built on the walls of the organic vegetable botanical garden 29. The solar photovoltaic modules 31 are connected to an AC combiner cabinet via a grid-connected inverter. The AC combiner cabinet and the municipal power grid are connected to a distribution cabinet via a bidirectional smart meter. The distribution cabinet supplies power to the air-source heat pump and water-source heat pump cascade collection system, the giant underground vacuum insulated energy storage system, and the modern agricultural planting system.

[0075] The modern agricultural planting system, in conjunction with a giant underground vacuum insulated energy storage system, a solar photovoltaic power generation system, and an air-source heat pump and water-source heat pump cascade heat collection system, maintains a constant temperature within the organic vegetable garden. In winter, the organic vegetable garden 29 utilizes the heat dissipation from the back of the photovoltaic modules combined with the heat dissipation from the giant underground vacuum insulated energy storage system to transfer temperature to the organic soil, creating a greenhouse effect within the garden. Simultaneously, the air-source heat pump system provides auxiliary heating to the air within the garden, maintaining a constant temperature. In summer, when the temperature inside the garden is higher, the air-source heat pump system extracts heat generated within the garden and stores it in the giant underground vacuum insulated energy storage system. The air-source heat pump system also blows air onto the top of the garden, reducing the back temperature of the solar photovoltaic modules 31, increasing power generation while maintaining a constant temperature within the garden.

[0076] The solar photovoltaic power generation system converts solar radiation into electricity through photovoltaic modules. The generated electricity is prioritized for use by system loads, including air-source heat pump systems, water-source heat pump systems, and electrical equipment in the organic vegetable botanical garden 29, thereby improving the local energy consumption rate. When sunlight is insufficient and power generation cannot meet load demand, the system can automatically switch to grid power supply via the control distribution cabinet, ensuring the continuity and stability of overall operation. Through the "self-generation and self-consumption + off-peak electricity grid connection" operating mode, electricity costs are reduced.

[0077] Furthermore, considering the remote control of solar photovoltaic power generation systems, air-source heat pump and water-source heat pump cascade heat collection systems, giant underground vacuum insulated energy storage systems, and modern agricultural planting systems, such as... Figure 1As shown, this embodiment also includes an intelligent control center that is remotely connected to the distribution cabinet of the solar photovoltaic power generation system, the air source heat pump system and the water source heat pump system of the air source heat pump and water source heat pump cascade heat collection system via the Internet.

[0078] The intelligent control center consists of several computers. Based on weather and electricity load data, the center can remotely control the distribution cabinets of the solar photovoltaic power generation system, switching between power supply from the solar photovoltaic system and the municipal power grid. Furthermore, it can remotely send information to the air-source heat pump system, water-source heat pump system, heating system, and cooling system, enabling remote dynamic optimization and scheduling of the entire energy storage and peak-shaving power station.

[0079] It should be noted that the vacuum system, water source heat pump system, air source heat pump system, heating system, cooling system, and greenhouse structure mentioned in this embodiment are all existing technologies, and their composition, function, and role are common knowledge in the field, and will not be described in detail here; at the same time, the connection between the above systems and the corresponding components of the giant underground vacuum thermal insulation energy storage is only a conventional pipeline connection.

[0080] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A large-capacity, long-cycle solar-air energy storage peak-shaving power station system, characterized by: These include solar photovoltaic power generation systems, air source heat pump and water source heat pump cascade heat collection systems, giant underground vacuum insulated energy storage systems, and modern agricultural planting systems; The giant underground vacuum thermal insulation energy storage system includes a giant underground vacuum thermal insulation energy storage tank, which is buried underground. The giant underground vacuum thermal insulation energy storage tank adopts a steel-concrete tank wall with a vacuum insulation structure. Its interior stores liquid heat storage medium, and a water pipeline assembly connected to an air source heat pump and a water source heat pump cascade heat collection system, a residential heating system, and a residential cooling system is installed in the giant underground vacuum thermal insulation energy storage tank. The modern agricultural planting system includes an organic vegetable garden located above the ground of a giant underground vacuum insulated energy storage warehouse. The organic vegetable garden is a greenhouse structure built on a steel-concrete cover plate using a standard steel frame and solar photovoltaic modules. The solar photovoltaic power generation system includes solar photovoltaic modules built on the walls and roof of the organic vegetable botanical garden. The solar photovoltaic modules are connected to the AC combiner cabinet through a grid-connected inverter. The AC combiner cabinet and the mains power grid are connected to the distribution cabinet through a two-way smart meter. The distribution cabinet supplies power to the air source heat pump and water source heat pump cascade heat collection system, the giant underground vacuum heat storage system, and the modern agricultural planting system. The distribution cabinet is remotely controlled by the intelligent control center. The air source heat pump and water source heat pump superimposed heat collection system includes an air source heat pump system and a water source heat pump system built on a giant underground vacuum insulated energy storage facility and an organic vegetable botanical garden. The air source heat pump system and the water source heat pump system are respectively connected to the water supply pipeline components of the giant underground vacuum insulated energy storage facility system, and are also connected to the solar photovoltaic power generation system and the power grid, and remotely controlled by the intelligent control center.

2. The solar air energy large capacity long period energy storage peak shaving power plant system engineering of claim 1, wherein: The giant underground vacuum thermal energy storage tank has an internal structure consisting of an upper thermal storage area, a middle thermal storage area, and a caisson thermal storage area arranged from top to bottom. The upper thermal storage area, the middle thermal storage area, and the caisson thermal storage area store liquid thermal storage media at different temperatures. The upper thermal storage area is enclosed by a reinforced concrete cover plate, a reinforced concrete tank wall A with an embedded vacuum insulation layer, and a reinforced concrete ceramsite bottom plate; the middle thermal storage area is enclosed by a reinforced concrete ceramsite bottom plate, a reinforced concrete tank wall B with an embedded vacuum insulation layer, and a reinforced concrete bottom plate; the caisson thermal storage area is enclosed by a reinforced concrete bottom plate, a caisson reinforced concrete wall with an embedded caisson vacuum insulation layer, and a caisson reinforced concrete bottom plate.

3. The solar air energy large capacity long period energy storage peak shaving power plant system project according to claim 1, characterized in that: The giant underground vacuum insulated energy storage tank is also equipped with an energy storage tank retaining wall inside. The two sides of the energy storage tank retaining wall are connected to the reinforced concrete tank wall A, the reinforced concrete ceramsite base plate, and the reinforced concrete tank wall B. The energy storage tank retaining wall divides the inside of the tank into a smaller high-grade energy storage tank and a larger energy storage tank. The upper part of the heating tank is connected to the upper heat storage area of ​​the energy storage tank, and the lower part of the heating tank is connected to the middle heat storage area of ​​the energy storage tank.

4. The solar air energy large capacity long period energy storage peak shaving power plant system engineering of claim 3, characterized in that: The water supply pipeline assemblies for the upper heat storage area, the middle heat storage area, and the caisson heat storage area are respectively set at three horizontal heights, and each water supply pipeline assembly includes several sets of water supply pipelines and several sets of return water pipelines. The water supply pipeline connected to the air source heat pump system extends to the bottom of the caisson heat storage area of ​​the energy storage tank, and the return water pipeline connected to the air source heat pump system extends to the middle heat storage area of ​​the energy storage tank. The water supply pipeline connected to the cooling system extends to the bottom of the caisson thermal storage area of ​​the energy storage tank, and the return water pipeline connected to the cooling system extends to the upper thermal storage area of ​​the energy storage tank. The water supply pipeline connected to the water source heat pump system extends to the middle heat storage area of ​​the energy storage tank, and the return water pipeline connected to the water source heat pump system extends to the upper heat storage area of ​​the energy storage tank. The water supply pipeline connected to the heating system extends to the upper heat storage area of ​​the heating warehouse, and the return water pipeline connected to the heating system extends to the middle heat storage area of ​​the energy storage warehouse. Water distributors are installed at the ends of each water supply and return pipeline.

5. The solar air energy large capacity long period energy storage peak-shaving power plant system engineering of claim 2, characterized in that: The reinforced concrete ceramsite base plate is set at a 45° inclination angle; the bottom of the caisson reinforced concrete wall is provided with a caisson cutting edge; a reinforced concrete support is installed on the reinforced concrete silo wall A, and the reinforced concrete cover plate is fixedly installed on the top of the reinforced concrete silo wall A through the reinforced concrete support.

6. The solar air energy large capacity long period energy storage peak-shaving power plant system engineering of claim 1, characterized in that: The vertical cross-section of the giant underground vacuum thermal energy storage facility is square, rectangular, trapezoidal, or circular.

7. The solar air energy large capacity long period energy storage peak-shaving power plant system project according to claim 1, characterized in that: The intelligent control center consists of several industrial computers that are remotely connected to the power distribution cabinet, air source heat pump system, and water source heat pump system via the Internet.

8. The solar air energy large capacity long period energy storage peak-shaving power plant system project according to claim 1, characterized in that: The roof and south facade of the organic vegetable botanical garden are covered with monocrystalline solar photovoltaic modules, while the east and west sides use low-light solar photovoltaic modules as the wall structure. The north side uses an air source heat pump system and power distribution equipment as the enclosure wall, forming an enclosed greenhouse structure.

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