Shaft type double-layer rotary buried pipe heat reservoir and energy storage system

Abstract

The utility model provides a wellbore type double-layer rotary buried pipe heat reservoir and an energy storage system, and the heat reservoir comprises a wellbore pile buried in the inner layer of soil, a double-layer reinforcement cage arranged in the wellbore pile and used for supporting, and a double-layer water pipe spirally wound on the double-layer reinforcement cage and used for water circulation. Different from a traditional spiral buried pipe heat storage device, the spiral buried pipe heat storage device has the advantages that the double pipes are wound on the outer sides of the outer-layer reinforcement cage and the inner-layer reinforcement cage, the heat storage amount is increased, the heat storage speed is increased, and the heat storage performance is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of energy supply, in particular to a wellbore type double-layer rotary buried pipe heat storage device and an energy storage system. Background Art

[0002] The U-shaped buried tube heat storage device is a device that uses the shallow underground soil as a heat storage medium and exchanges heat with the soil through the U-shaped buried tube heat exchanger to achieve heat storage and release. The existing U-shaped buried tube heat exchanger has the following problems:

[0003] 1. Limited heat exchange efficiency

[0004] The U-shaped buried tube heat exchanger is a vertical single U-tube or double U-tube with a diameter of generally 20-32mm. It has a small contact area with the rock and soil layer, and the heat transferred and stored in a certain period of time is limited, and the heat transfer efficiency is low.

[0005] 2. Large area

[0006] U-shaped underground heat pipes typically require a larger area of ​​land for installation. To ensure effective heat exchange, a certain spacing between pipes and a sufficient number of buried pipes are required. This can be a limitation in areas with limited land resources, particularly in urban centers or densely populated areas, where it can be difficult to find a site large enough to install a U-shaped underground heat pipe.

[0007] 3. Construction is difficult

[0008] Boring construction requires extensive underground drilling to install the U-tubes. The depth of the holes is often quite deep, requiring high standards for equipment and techniques. In areas with complex geological conditions, such as rock formations and high groundwater levels, drilling can be even more challenging, and may even require specialized drilling techniques and equipment, increasing construction costs and time.

[0009] Therefore, it is crucial to provide a heat storage device that has a fast heat storage rate and saves space. Utility Model Content

[0010] In view of the problems existing in the prior art, the utility model provides a wellbore type double-layer rotary buried pipe heat storage device and energy storage system.

[0011] Among them, a wellbore double-layer rotary buried pipe heat storage device includes:

[0012] Well piles buried in the inner layer of soil;

[0013] a double-layer steel cage provided inside the shaft pile for support;

[0014] and a double-layer water pipe spirally wound on the double-layer steel cage for water circulation.

[0015] On the basis of the above-mentioned scheme, the double-layer steel reinforcement cage comprises an outer steel reinforcement cage for support and an inner steel reinforcement cage for support arranged inside the outer steel reinforcement cage.

[0016] On the basis of the above-mentioned scheme, the double-layer water pipe comprises:

[0017] An outer water pipe spirally wound on the outer steel reinforcement cage and an inner water pipe spirally wound on the inner steel reinforcement cage.

[0018] On the basis of the above-mentioned scheme, the outer water pipe is spirally wound on the outer side of the outer steel reinforcement cage clockwise from the top of the outer steel reinforcement cage downward, and after spirally winding to the bottom of the outer steel reinforcement cage, the outer water pipe is vertically extended along the inner side of the shaft pile to the ground.

[0019] On the basis of the above-mentioned scheme, further comprising: a medium layer for energy storage and heat preservation between the outer steel reinforcement cage and the inner steel reinforcement cage.

[0020] On the basis of the above-mentioned scheme, the inner water pipe is spirally wound on the outer side of the inner steel reinforcement cage clockwise from the top of the inner steel reinforcement cage downward, and after spirally winding to the bottom of the inner steel reinforcement cage, the inner water pipe is vertically extended along the inner side of the shaft pile to the ground.

[0021] On the basis of the above-mentioned scheme, further comprising: an energy storage assembly water inlet pipe which is communicated with the water inlet end of the outer water pipe and the water inlet end of the inner water pipe through a water inlet pipe tee joint;

[0022] and an energy storage assembly water outlet pipe which is communicated with the water outlet end of the outer water pipe and the water outlet end of the inner water pipe through a water outlet pipe tee joint.

[0023] On the basis of the above-mentioned scheme, further comprising: a water inlet pipe valve, a water inlet pipe flow meter, a water inlet pipe pressure gauge and a water inlet pipe thermometer arranged on the energy storage assembly water inlet pipe along the fluid flow direction.

[0024] On the basis of the above-mentioned scheme, further comprising: a water outlet pipe thermometer, a water outlet pipe pressure gauge, a water outlet pipe flow meter and a water outlet pipe valve arranged on the energy storage assembly water outlet pipe along the fluid flow direction.

[0025] On the basis of the above-mentioned scheme, the shaft pile is provided with a data acquisition instrument for measuring cold / heat storage temperature and collecting data, a temperature measuring optical fiber and a temperature probe.

[0026] In addition, the utility model provides a kind of energy storage system, comprising:

[0027] Pipe network;

[0028] The well-shaft double-layer rotary buried pipe heat accumulator of one described is communicated with the water inlet end and the water outlet end of pipe network respectively;

[0029] A cold storage component for cold storage circulation, connected to the water inlet and water outlet of the wellbore type double-layer rotary buried pipe heat storage;

[0030] A heat storage component for heat storage circulation, which is in communication with the water inlet and the water outlet of the wellbore type double-layer rotary buried pipe heat storage device;

[0031] An energy supply component connected to the water inlet and outlet of the wellbore double-layer rotary buried pipe heat storage device for performing a heating cycle or a cooling cycle for the user side;

[0032] A hot water supply component is communicated with the heat storage component and is used to supply water to users.

[0033] Compared to existing technologies, this new system utilizes the thermal insulation properties of the ground to store solar heat underground. Unlike traditional spiral buried pipe heat storage systems, this system utilizes a double tube wrapped around the outer and inner steel cages, increasing the heat storage capacity, speed, and performance. Compared to other heat storage methods, such as U-shaped buried pipes and horizontal buried pipes, the spiral buried pipe heat storage system significantly alleviates the high initial investment, complex construction process, and environmental pollution associated with drilling. Furthermore, the system maintains a large contact area with the rock and soil, resulting in a rapid heat storage rate. The present invention effectively addresses the issues of traditional ground-source heat pump systems, such as the large number of holes drilled in U-shaped tubes, high costs, and slow heat storage. By combining the cold and heat storage components with the rotating buried tube energy storage component, the system can improve the cold and heat storage rates and efficiency compared to conventional U-shaped buried tube energy storage components. It maximizes the use of natural energy sources such as dry air energy, solar energy, and geothermal energy, resolving the problem of underground heat and cold imbalances. It achieves integrated energy supply and storage, enabling sustainable utilization of geothermal resources and enabling four operating modes: cold storage, heat storage, energy supply, and hot water supply. This truly achieves integrated supply and storage, while also being simple and easy to install and maintain. In particular, the rotating buried tube energy storage component simultaneously utilizes the transitional season cooling tower for cold storage and solar energy for heat storage, achieving "dual cold and heat storage," breaking the limitations of traditional single energy storage. Furthermore, cross-seasonal energy storage improves the heat pump's operating efficiency, facilitating long-term stable operation of the system and achieving sustainable utilization of geothermal resources. Furthermore, the components included in the present invention are easy to purchase and assemble, resulting in low production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of the wellbore type double-layer rotary buried pipe heat storage device of the utility model;

[0035] Figure 2 This is a structural diagram of the wellbore type double-layer rotary buried pipe heat storage device of the utility model (showing a cross-sectional view);

[0036] Figure 3 This is a structural diagram of the energy storage system of the utility model. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments described below are intended to facilitate understanding of the present invention and do not have any limiting effect on the present invention.

[0038] Example 1

[0039] like Figure 1 As shown, the utility model provides a wellbore type double-layer rotary buried pipe heat storage device comprising: a wellbore pile 2-1 buried in the inner layer of the soil, a double-layer steel cage 2-2 for support arranged inside the wellbore pile 2-1, and a double-layer water pipe 2-3 spirally wound on the double-layer steel cage 2-2 for water circulation.

[0040] The double-layer steel cage 2-2 includes an outer steel cage 2-2-1 and an inner steel cage 2-2-2 arranged inside the outer steel cage 2-2-1.

[0041] The double-layer water pipe 2-3 includes an outer water pipe 2-3-1 spirally wound clockwise around the outer steel cage 2-2-1, and an inner water pipe 2-3-2 spirally wound clockwise around the inner steel cage 2-2-2. Specifically, the outer water pipe 2-3-1 is spirally wound clockwise downward from the top of the outer steel cage 2-2-1, spirally wound to the bottom of the outer steel cage 2-2-1, and then vertically extended along the inner side of the shaft pile 2-1 to the ground. The inner water pipe 2-3-2 is spirally wound clockwise downward from the top of the inner steel cage 2-2-2, spirally wound to the bottom of the inner steel cage 2-2-2, and then vertically extended along the inner side of the shaft pile 2-1 to the ground.

[0042] like Figure 2 As shown, in order to realize the diversion of the fluid, it also includes: an energy storage component water inlet pipe 2-5 that is interconnected with the water inlet end of the outer water pipe 2-3-1 and the water inlet end of the inner water pipe 2-3-2 through the water inlet pipe tee 2-4, and an energy storage component water outlet pipe 2-7 that is interconnected with the water outlet end of the outer water pipe 2-3-1 and the water outlet end of the inner water pipe 2-3-2 through the water outlet pipe tee 2-6.

[0043] The shaft pile 2-1 is a double-layer cylindrical structure, and the space between the double-layer cylindrical walls is filled with original soil as a medium layer 2-16 for energy storage and heat preservation.

[0044] To further monitor parameters such as pressure, temperature, and flow, the system also includes a water inlet valve 2-8, a water inlet flow meter 2-9, a water inlet pressure gauge 2-10, and a water inlet thermometer 2-11, arranged along the fluid flow direction on the water inlet pipe 2-5 of the energy storage assembly. The wellbore pile 2-1 is internally equipped with a data acquisition device 2-17, a temperature measurement optical fiber 2-18, and a temperature probe 2-19 for measuring the cold and hot storage temperatures and collecting data.

[0045] As a specific implementation scheme, it also includes: a water outlet pipe thermometer 2-12, a water outlet pipe pressure gauge 2-13, a water outlet pipe flow meter 2-14 and a water outlet pipe valve 2-15 arranged on the energy storage component water outlet pipe 2-7 along the fluid flow direction.

[0046] In this embodiment, the energy storage component water inlet pipe 2-5, the energy storage component water outlet pipe 2-7, the input end of the outer water pipe 2-3-1, the input end of the inner water pipe 2-3-2, the output end of the outer water pipe 2-3-1, and the output end of the inner water pipe 2-3-2 are all PE pipes with a diameter of 32 cm.

[0047] Different from traditional spiral buried pipe heat storage, the utility model provides a wellbore double-layer rotary buried pipe heat storage that uses double pipes wrapped around the outside of the outer and inner steel cages, which increases the heat storage capacity, improves the heat storage speed, and enhances the heat storage performance.

[0048] Example 2

[0049] like Figure 3 As shown, this embodiment provides a specific implementation of an energy storage system based on a wellbore double-layer rotary buried pipe heat storage device in Example 1, specifically including:

[0050] Pipeline network 1;

[0051] A well-type double-layer rotary buried pipe heat storage device 2 in embodiment 1, which is respectively connected to the water inlet and the water outlet of the pipe network 1;

[0052] A cold storage component 3 for cold storage circulation, connected to the water inlet and water outlet of the wellbore type double-layer rotary buried pipe heat storage device 2;

[0053] A heat storage component 4 for heat storage circulation, which is connected to the water inlet and the water outlet of the wellbore type double-layer rotary buried pipe heat storage device 2;

[0054] An energy supply component 5 connected to the water inlet and outlet of the wellbore double-layer rotary buried pipe heat storage device 2 for performing a heating cycle or a cooling cycle for the user side;

[0055] A hot water supply component 6 is connected to the heat storage component 4 and is used to supply water to users.

[0056] The above-mentioned system of the present invention includes a dry air energy cold storage component, a solar energy heat storage component, a rotating buried pipe energy storage component and a ground source heat pump energy supply component, which can provide users with cold storage, heat storage, energy supply or hot water supply, and can provide one energy supply mode alone or both heat storage and hot water supply.

[0057] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A well-type double-layer rotary buried pipe heat storage device, characterized in that: include: Well piles (2-1) buried in the inner layer of soil; A double-layer steel cage (2-2) for support arranged inside the shaft pile (2-1); and a double-layer water pipe (2-3) spirally wound on the double-layer steel cage (2-2) for water circulation.

2. The wellbore type double-layer rotary buried pipe heat storage device according to claim 1 is characterized in that: The double-layer steel cage (2-2) comprises an outer steel cage (2-2-1) for support and an inner steel cage (2-2-2) for support arranged inside the outer steel cage (2-2-1).

3. The wellbore type double-layer rotary buried pipe heat storage device according to claim 2 is characterized in that: Also includes: A medium layer (2-16) for energy storage and heat preservation is provided between the outer steel cage (2-2-1) and the inner steel cage (2-2-2).

4. The wellbore type double-layer rotary buried pipe heat storage device according to claim 2, characterized in that: The double-layer water pipe (2-3) comprises: An outer water pipe (2-3-1) is spirally wound around the outer steel cage (2-2-1), and an inner water pipe (2-3-2) is spirally wound around the inner steel cage (2-2-2).

5. The wellbore type double-layer rotary buried pipe heat storage device according to claim 4 is characterized in that: The outer water pipe (2-3-1) is wound clockwise downward from the top of the outer steel cage (2-2-1) to the outside of the outer steel cage (2-2-1), spirally wound to the bottom of the outer steel cage (2-2-1), and then vertically extended to the ground along the inner side of the well pile (2-1); The inner water pipe (2-3-2) starts from the top of the inner steel cage (2-2-2) and is wound clockwise downwards around the outer side of the inner steel cage (2-2-2). After being spirally wound to the bottom of the inner steel cage (2-2-2), it extends vertically along the inner side of the well pile (2-1) to the ground.

6. The wellbore type double-layer rotary buried pipe heat storage device according to claim 4, characterized in that: Also includes: an energy storage component water inlet pipe (2-5) connected to the water inlet end of the outer water pipe (2-3-1) and the water inlet end of the inner water pipe (2-3-2) through a water inlet pipe tee (2-4); and an energy storage component water outlet pipe (2-7) which is interconnected with the water outlet end of the outer water pipe (2-3-1) and the water outlet end of the inner water pipe (2-3-2) through a water outlet pipe tee (2-6).

7. The wellbore type double-layer rotary buried pipe heat storage device according to claim 6, characterized in that: Also includes: A water inlet pipe valve (2-8), a water inlet pipe flow meter (2-9), a water inlet pipe pressure gauge (2-10) and a water inlet pipe thermometer (2-11) are arranged on the water inlet pipe (2-5) of the energy storage component along the fluid flow direction.

8. The wellbore type double-layer rotary buried pipe heat storage device according to claim 6, characterized in that: Also includes: A water outlet pipe thermometer (2-12), a water outlet pipe pressure gauge (2-13), a water outlet pipe flow meter (2-14) and a water outlet pipe valve (2-15) are arranged on the water outlet pipe (2-7) of the energy storage component along the fluid flow direction.

9. The well-type double-layer rotary buried pipe heat storage device according to claim 1, characterized in that: The well pile (2-1) is provided with a data acquisition instrument (2-17), a temperature measuring optical fiber (2-18) and a temperature probe (2-19) for measuring the cold / heat storage temperature and collecting data.

10. An energy storage system, characterized in that: include: Pipeline network (1); A well-type double-layer rotary buried pipe heat storage device (2) as claimed in any one of claims 1 to 9, which is respectively connected to the water inlet and the water outlet of the pipe network (1); A cold storage component (3) for cold storage circulation, connected to the water inlet and water outlet of the wellbore type double-layer rotary buried pipe heat storage device (2); A heat storage component (4) for heat storage circulation, which is in communication with the water inlet and the water outlet of the wellbore type double-layer rotary buried pipe heat storage device (2); An energy supply component (5) connected to the water inlet and the water outlet of the wellbore type double-layer rotary buried pipe heat storage device (2) for performing a heating cycle or a cooling cycle for the user side; A hot water supply component (6) is in communication with the heat storage component (4) and is used to supply water to users.

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