A super-large buried vacuum thermal energy storage library structure

Abstract

The utility model discloses a giant buried vacuum heat preservation energy storage structure belongs to new energy storage technology field. The energy storage library is buried in the ground, and the gradient heat storage partition of the upper high temperature heat storage, the middle temperature heat storage and the caisson area low temperature heat storage that communicate is arranged in the inside of the library body, and the library wall is integrated steel clay particle bottom plate, vacuum heat preservation layer and layered delivery and distribution system, realizes the natural circulation of heat storage medium and the ultra -low energy consumption of annual average heat loss rate <1%. The utility model discloses as the large capacity, long -term cross -season energy storage peak shaving engineering system, can effectively overcome solar intermittency, air source heat pump low temperature performance attenuation and power grid peak shaving problem, replaces traditional coal heating mode, realizes clean heat energy " summer storage winter use + winter storage summer use " all -year -round recycling, and helps low -carbon transformation and climate management target realization.

Claims

1. A giant underground vacuum thermal energy storage structure, characterized in that: This giant underground vacuum thermal energy storage facility is buried underground. Inside the facility, there are interconnected upper thermal storage area, middle thermal storage area and caisson thermal storage area from top to bottom. The upper thermal storage area, middle thermal storage area and caisson thermal storage area store liquid thermal storage media at different temperatures respectively. The upper thermal storage zone is enclosed by a reinforced concrete cover plate, a reinforced concrete wall A with a vacuum insulation structure, and a reinforced concrete ceramsite bottom plate; the middle thermal storage zone is enclosed by a reinforced concrete ceramsite bottom plate, a reinforced concrete wall B with a vacuum insulation structure, and a reinforced concrete bottom plate; the caisson thermal storage zone is enclosed by a reinforced concrete bottom plate, a caisson reinforced concrete wall with a vacuum insulation structure, and a caisson reinforced concrete bottom plate. The reservoir is also equipped with water supply pipelines extending to the upper heat storage area, the middle heat storage area, and the caisson heat storage area. The water supply pipelines in the upper heat storage area pass through the reservoir and connect to the heating system pipelines. The water supply pipelines in the middle heat storage area pass through the reservoir and connect to the water source heat pump system. The water supply pipelines in the caisson heat storage area pass through the reservoir and connect to the air source heat pump system.

2. The giant underground vacuum thermal insulation energy storage structure 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 interior of the tank into a smaller heating 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.

3. The giant underground vacuum thermally insulated energy storage structure according to claim 2, 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 heat storage area of ​​the energy storage tank, and the return water pipeline connected to the cooling system extends to the upper heat 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 tank, and the return water pipeline connected to the heating system extends to the middle heat storage area of ​​the energy storage tank; water distributors are installed at the ends of each water supply pipeline and return water pipeline.

4. The giant underground thermal vacuum thermal energy storage structure according to claim 1, characterized in that: The steel-concrete silo wall A is embedded with a vacuum insulation layer A, the steel-concrete silo wall B is embedded with a vacuum insulation layer B, and the caisson steel-concrete wall is embedded with a caisson vacuum insulation layer; vacuum pipes are respectively provided on the steel-concrete silo wall A, steel-concrete silo wall B and caisson steel-concrete wall, and the vacuum pipes are connected to the corresponding vacuum insulation layers.

5. The giant underground thermal vacuum thermal energy storage structure according to claim 1, characterized in that: The steel-concrete ceramsite base plate is set at a 45° inclination angle.

6. The giant underground thermal vacuum thermal energy storage structure according to claim 1, characterized in that: 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.

7. The giant underground thermal vacuum thermal energy storage structure according to claim 1, characterized in that: The vertical cross-section of this giant underground vacuum thermal energy storage facility is square, rectangular, trapezoidal, or circular.

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