An energy storage device and heating and ventilation equipment

Abstract

This application discloses an energy storage device and HVAC equipment, relating to the field of energy storage technology. The energy storage device includes a thermal insulation structure, multiple first pile foundations, and multiple heat exchangers. By burying the thermal insulation structure in the foundation soil and forming an energy storage space within the thermal insulation structure, the thermal insulation structure prevents heat exchange between the foundation soil inside the energy storage space and the foundation soil outside the energy storage space, thereby preventing energy loss from the energy storage space. During off-peak hours at night, the energy is stored in the foundation soil inside the energy storage space through heat exchangers. During the day, the energy in the energy storage space can be absorbed by the heat exchangers to provide heating or cooling for users, thus ensuring the "peak shaving and valley filling" effect of the HVAC equipment. Furthermore, since the entire energy storage device is buried in the foundation soil, the footprint can be reduced, and since the energy storage device uses the foundation soil as the energy storage medium, construction costs can be reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage device and heating, ventilation and air conditioning equipment. Background Technology

[0002] Currently, my country's total carbon emissions have reached 11.48 billion tons, of which the total carbon emissions from the building sector amount to 5.08 billion tons, accounting for as much as 44.3%. Among the building sector, heating, ventilation, and air conditioning systems have the highest carbon emissions.

[0003] In related technologies, to reduce carbon emissions and operating costs of HVAC systems, large-capacity energy storage devices can be installed. These devices can utilize off-peak electricity hours at night for peak-shifting heating or cooling energy storage, and can also be used to absorb renewable energy, thus playing a role in "peak shaving and valley filling" to balance the heating or cooling load of the HVAC system. Furthermore, by leveraging the peak-valley electricity price difference on the power grid, the system's operating costs can be significantly reduced.

[0004] However, in practical applications, in order to ensure the "peak shaving and valley filling" effect of the HVAC system, the energy storage device needs to have a large heat capacity, which will result in the energy storage device occupying a large area and having a high construction cost. Utility Model Content

[0005] This application provides an energy storage device and HVAC equipment, which can solve the technical problems of large footprint and high construction cost of energy storage devices.

[0006] In a first aspect, embodiments of this application provide an energy storage device, which is applied to HVAC equipment, and the energy storage device includes:

[0007] A thermal insulation structure is used to be buried in the foundation soil, and the thermal insulation structure is used to enclose an energy storage space, the energy storage space is used to contain the foundation soil, and the thermal insulation structure is used to prevent the energy in the energy storage space from being lost to the outside.

[0008] Multiple first piles are used to be buried in the foundation soil within the energy storage space;

[0009] Multiple heat exchangers are provided, one of which is embedded in one of the first pile foundations, and the heat exchanger is used to exchange heat with the foundation soil in the energy storage space.

[0010] In some embodiments, the energy storage device includes a first pile foundation group, the first pile foundation group including a plurality of first pile foundations, and the thermal insulation structure includes:

[0011] The bottom insulation layer is embedded in the foundation soil and located below the first pile group;

[0012] A lateral heat insulation layer is embedded in the foundation soil and located on the side of the first pile group, extending around the first pile group.

[0013] The top insulation layer is buried in the foundation soil and located above the first pile foundation group. The top insulation layer, the side insulation layer and the bottom insulation layer together form the energy storage space.

[0014] In some embodiments, the energy storage device further includes a plurality of second piles, each of which is buried in the foundation soil and arranged in a circle around the first pile group at intervals, and each of the second piles is connected to the lateral insulation layer.

[0015] In some embodiments, the heat exchanger is configured to communicate with an external heat source and heating equipment;

[0016] The heat exchanger and the external heat source form an energy storage loop, which is used to transfer energy to the foundation soil in the energy storage space for storage.

[0017] The heat exchanger and the heating equipment form an energy circuit, which is used to transfer the energy stored in the foundation soil to the heating equipment.

[0018] In some embodiments, the heat exchanger includes a first heat exchange tube embedded in the first pile foundation. The first heat exchange tube is used to communicate with the external heat source to form the energy storage circuit and the energy consumption circuit. The first heat exchange tube is also used to communicate with the heating equipment to form the energy consumption circuit.

[0019] In some embodiments, the heat exchanger includes:

[0020] The first heat exchange tube is buried in the first pile foundation and is used to communicate with the external heat source. The first heat exchange tube and the external heat source form the energy storage circuit.

[0021] The second heat exchange pipe is buried in the first pile foundation and is used to connect with the heating equipment, forming an energy circuit with the heating equipment.

[0022] In some embodiments, the first heat exchange tube includes a first tube segment, a second tube segment, and a third tube segment connected in sequence;

[0023] The first pipe segment is at least partially located outside the first pile foundation, and the first pipe segment extends toward the bottom of the first pile foundation in a first direction;

[0024] The second pipe section is buried in the first pile foundation, and the second pipe section extends along the second direction, which is set at an angle to the first direction;

[0025] The third pipe segment extends toward the top of the first pile foundation in the opposite direction to the first direction, and the third pipe segment extends at least partially beyond the first pile foundation.

[0026] In some embodiments, the plurality of heat exchangers include an energy storage heat exchanger and an energy consumption heat exchanger;

[0027] The energy storage heat exchanger is used to connect with an external heat source to form an energy storage loop, and the energy storage loop is used to transfer energy to the foundation soil in the energy storage space for storage.

[0028] The energy heat exchanger is used to connect with the heating equipment to form an energy circuit, and the energy circuit is used to transfer the energy stored in the foundation soil to the heating equipment.

[0029] In some embodiments, the energy storage heat exchanger is arranged adjacent to the energy consumption heat exchanger.

[0030] Secondly, embodiments of this application provide a heating, ventilation, and air conditioning (HVAC) system, which includes heating equipment and an energy storage device as described in any of the preceding claims, wherein the heating equipment is connected to the heat exchanger.

[0031] The energy storage device and HVAC equipment based on the embodiments of this application have at least the following beneficial effects:

[0032] By embedding an insulation structure within the foundation soil and enclosing it to form an energy storage space, a portion of the foundation soil is contained within the energy storage space. The insulation structure prevents heat exchange between the foundation soil within and outside the energy storage space, thus preventing energy loss from the energy storage space. Multiple first piles are embedded in the foundation soil within the energy storage space, and a heat exchanger is correspondingly embedded within each first pile. This allows the heat exchanger to exchange heat with the foundation soil within the energy storage space. During off-peak hours at night, the heat exchanger stores energy within the foundation soil of the energy storage space. During the day, the heat exchanger absorbs energy from the energy storage space to provide heating or cooling to users, ensuring the "peak shaving and valley filling" effect of the HVAC system. Furthermore, since the entire energy storage device is embedded within the foundation soil, the footprint is reduced, and the use of the foundation soil as the energy storage medium lowers construction costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a cross-sectional structural schematic diagram of an energy storage device provided in an embodiment of this application;

[0035] Figure 2 This is a top view of an energy storage device provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Energy storage device; 10. Thermal insulation structure; 11. Bottom thermal insulation layer; 12. Side thermal insulation layer; 13. Top thermal insulation layer; 14. Waterproof layer; 15. Structural base plate; 16. Concrete layer; 20. Foundation soil; 30. First pile foundation; 40. Heat exchanger; 41. First heat exchange tube; 411. First pipe section; 412. Second pipe section; 413. Third pipe section; 42. Second heat exchange tube; 401. Energy storage heat exchanger; 402. Energy consumption heat exchanger; 50. Second pile foundation. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] Firstly, please refer to Figure 1 and Figure 2 This application proposes an energy storage device 100, which is applied to HVAC equipment. The energy storage device 100 can store energy for use by the HVAC equipment. The energy storage device includes a heat insulation structure 10, a plurality of first pile foundations 30, and a plurality of heat exchangers 40. The heat insulation structure 10 is buried in the foundation soil 20 and forms an energy storage space. The energy storage space is used to contain the foundation soil 20. The heat insulation structure 10 is used to prevent the energy in the energy storage space from being lost outward. The plurality of first pile foundations 30 are buried in the foundation soil 20 in the energy storage space. One heat exchanger 40 is buried in one first pile foundation 30 and is used to exchange heat with the foundation soil 20 in the energy storage space so as to store the foundation soil 20 that can be stored in the energy storage space.

[0040] Optionally, the insulation structure 10 can divide the foundation soil 20 into two parts: the foundation soil 20 located within the energy storage space is the first part, and the foundation soil 20 located within the energy storage space is the second part. For ease of description, the foundation soil 20 within the energy storage space is defined as the energy storage soil part, and the foundation soil 20 outside the energy storage space is defined as the supporting soil part. The insulation structure 10 can isolate the transfer of heat. By burying multiple first piles 30 in the energy storage soil part within the energy storage space, and correspondingly burying a heat exchanger 40 in one of the first piles 30, the heat exchanger 40 can exchange heat with the energy storage soil part within the energy storage space, and the insulation structure 10 can prevent the energy storage soil part from exchanging heat with the supporting soil part, thereby storing energy in the energy storage soil part.

[0041] More specifically, during off-peak hours at night, the energy is stored in the energy storage soil section within the energy storage space through the heat exchanger 40. During the day, the energy stored in the energy storage soil section can be absorbed by the heat exchanger 40 to provide heating or cooling to users, thereby ensuring the "peak shaving and valley filling" effect of the HVAC equipment. Furthermore, since the entire energy storage device 100 is buried in the foundation soil 20, the footprint can be reduced, and since the energy storage device 100 uses the foundation soil 20 as the energy storage medium, the construction cost can be reduced.

[0042] Please see Figure 1 and Figure 2 In some embodiments, the energy storage device includes a first pile foundation 30 group, which includes a plurality of first pile foundations 30. The heat insulation structure 10 includes a bottom heat insulation layer 11, a side heat insulation layer 12, and a top heat insulation layer 13. The bottom heat insulation layer 11 is buried in the foundation soil 20 and is located below the first pile foundation 30 group. The side heat insulation layer 12 is buried in the foundation soil 20 and is located on the side of the first pile foundation 30 group. The side heat insulation layer 12 extends around the first pile foundation 30 group. The top heat insulation layer 13 is buried in the foundation soil 20 and is located above the first pile foundation 30 group, so that the top heat insulation layer 13, the side heat insulation layer 12, and the bottom heat insulation layer 11 together form an energy storage space.

[0043] Optionally, the thermal insulation structure 10 is a structure used to reduce heat transfer in order to maintain a stable temperature in a specific space. During the installation of the thermal insulation structure 10, a foundation pit can be excavated on the foundation soil 20. A bottom thermal insulation layer 11 can be formed on the bottom slab of the pit using a pile bottom grouting process. Then, a side thermal insulation layer 12 is placed on the perimeter wall of the pit, and the foundation soil 20 is backfilled into the pit. Multiple first piles 30 are then embedded in the foundation soil 20 within the pit. Finally, the multiple first piles... A top insulation layer 13 is provided on the top of the 30, so that the top insulation layer 13, the side insulation layer 12 and the bottom insulation layer 11 enclose and form an energy storage space. The top insulation layer 13 can prevent the energy in the energy storage space from being lost from the top of the energy storage space, the side insulation layer 12 can prevent the energy in the energy storage space from being lost from the sides of the energy storage space, and the bottom insulation layer 11 can prevent the energy in the energy storage space from being lost from the bottom of the energy storage space, so that the foundation soil 20 in the energy storage space can be used as an energy storage medium to store energy.

[0044] Please see Figure 1 In some embodiments, the thermal insulation structure 10 further includes a waterproof layer 14 disposed above the top thermal insulation layer 13.

[0045] Optionally, the waterproof layer 14 is a structural layer used to prevent water penetration. The waterproof layer 14 is disposed above the top insulation layer 13 so that the waterproof layer 14 can protect the top insulation layer 13 from water erosion and ensure that the top insulation layer 13 can be used normally.

[0046] In some other embodiments, a waterproof layer 14 may also be provided on the side of the side insulation layer 12 facing away from the first pile foundation 30, and a waterproof layer 14 may also be provided below the bottom insulation layer 11, so as to prevent moisture from penetrating into the energy storage space and to prevent heat loss from the energy storage space.

[0047] Optionally, a structural base plate 15 can be provided above the waterproof layer 14. The structural base plate 15 can protect the waterproof layer 14, prevent sharp objects from piercing the waterproof layer 14, reduce the direct friction on the waterproof layer 14, and extend the service life of the waterproof layer 14.

[0048] The thermal insulation structure 10 may also include a concrete layer 16, and a top thermal insulation layer 13 may be disposed between the concrete layer 16 and the waterproof layer 14. The concrete layer 16 may be connected to the top of the plurality of first pile foundations 30, so that the concrete layer 16 and the plurality of first pile foundations 30 can be supported under the top thermal insulation layer 13, thereby increasing the structural strength of the top thermal insulation layer 13 and preventing the top thermal insulation layer 13 from being damaged due to compression. Furthermore, the concrete layer 16 and the plurality of first pile foundations 30 are all located within the energy storage space, so that the bottom thermal insulation layer 11, the side thermal insulation layer 12 and the top thermal insulation layer 13 can better enclose the energy storage space.

[0049] Please see Figure 1 and Figure 2 In some embodiments, the energy storage device 100 further includes a plurality of second pile foundations 50, all of which are buried in the foundation soil 20 and are arranged in a circle around the first pile foundation group 30 at intervals. All of the second pile foundations 50 are connected to the side insulation layer 12.

[0050] Optionally, multiple second piles 50 are embedded in the foundation soil 20, and a portion of the multiple second piles 50 can be arranged in two rows in the transverse direction, while another portion of the multiple second piles 50 can be arranged in two columns in the longitudinal direction. The two rows of second piles 50 are located on opposite sides of the first pile group 30 in the longitudinal direction, and the two columns of second piles 50 are located on opposite sides of the first pile group 30 in the transverse direction, so that the multiple second piles 50 are arranged in a circle around the first pile group 30 at intervals. The shape formed by the multiple second piles 50 around the first pile group 30 is the same as the shape formed by the side insulation layer 12 around the first pile group 30. The multiple second piles 50 are all connected to the side insulation layer 12, so that the multiple second piles 50 can provide support for the side insulation layer 12 and enhance the overall strength of the insulation structure 10.

[0051] Please see Figure 2 In some embodiments, multiple first pile foundations 30 are arranged in an array, so that the multiple first pile foundations 30 can be evenly distributed in the energy storage space, thereby enabling multiple heat exchangers 40 to exchange heat more evenly with the foundation soil 20 in the energy storage space, further improving the energy storage effect of the energy storage device 100.

[0052] In some embodiments, the heat exchanger 40 can be connected to an external heat source and a heating device, the heat exchanger 40 and the external heat source can form an energy storage circuit, and the heat exchanger 40 and the heating device can form an energy consumption circuit.

[0053] The heat exchanger 40 is connected to an external heat source via a first open valve, and to a heating device via a second open valve. When the first open valve is open and the second open valve is closed, the heat exchanger 40 is connected to the external heat source and forms an energy storage circuit. At this time, the heat exchanger 40 is in an energy storage state, and the heat generated by the external heat source can be transferred to the heat exchanger 40 through the energy storage circuit. The heat exchanger 40 can transfer the heat to the foundation soil 20 in the energy storage space for storage. When the first open valve is closed and the second open valve is open, the heat exchanger 40 is connected to the heating device and forms an energy consumption circuit. At this time, the heat exchanger 40 is in an energy consumption state, and the heat exchanger 40 can transfer the energy stored in the foundation soil 20 to the heating device for use.

[0054] Please see Figure 1In some embodiments, the heat exchanger 40 includes a first heat exchange tube 41, which is embedded in the first pile foundation 30. The first heat exchange tube 41 is used to communicate with an external heat source and to transfer energy to the foundation soil 20 in the energy storage space for storage. The first heat exchange tube 41 is also used to communicate with heating equipment and to transfer the energy stored in the foundation soil 20 to the heating equipment.

[0055] Specifically, the first heat exchange pipe 41 includes a first pipe section 411, a second pipe section 412, and a third pipe section 413 connected in sequence. At least a portion of the first pipe section 411 is located outside the first pile foundation 30 and extends towards the bottom of the first pile foundation 30 along a first direction. The second pipe section 412 is buried inside the first pile foundation 30 and extends along a second direction, which is set at an angle to the first direction. The third pipe section 413 extends towards the top of the first pile foundation 30 in the opposite direction of the first direction and at least a portion of the third pipe section 413 extends out of the first pile foundation 30, making the first heat exchange pipe 41 a U-shaped pipe. This increases the length of the pipe buried in the first pile foundation 30, thereby enabling the first heat exchange pipe 41 to better exchange heat with the foundation soil 20.

[0056] The first pipe section 411 has a first interface end, and the third pipe section 413 has a second interface end. Both the first interface end and the second interface end are located outside the foundation soil 20. The external heat source has a first port and a second port, and the heating equipment has a first interface and a second interface. The first interface end and the second interface end are respectively connected to the first tee pipe and the second tee pipe. The first interface end is connected to the first port of the external heat source and the first interface of the heating equipment through the first tee pipe. The second interface end is connected to the second port of the external heat source and the second interface of the heating equipment through the second tee pipe.

[0057] Thus, the first heat exchange tube 41 can be connected in series with an external heat source and with heating equipment. The first heat exchange tube 41 can absorb heat from the external heat source and transfer the heat to the foundation soil 20 in the energy storage space for storage. In this way, it can be used for off-peak heating or cooling energy storage during off-peak hours at night. The first heat exchange tube 41 can also be used to absorb the energy stored in the foundation soil 20 and transfer the energy to the heating equipment for use.

[0058] Please see Figure 1 and Figure 2In some other embodiments, the heat exchanger 40 includes a first heat exchange tube 41 and a second heat exchange tube 42, both of which are buried within the first pile foundation 30. The first heat exchange tube 41 is used to connect with an external heat source, enabling it to absorb energy from the external heat source and transfer it to the foundation soil 20 within the energy storage space for storage. The second heat exchange tube 42 is used to connect with heating equipment, enabling it to absorb energy stored in the foundation soil 20 and transfer it to the heating equipment for use. Thus, the first heat exchange tube 41 is only used for energy storage, allowing for better utilization of off-peak electricity hours for peak heating or cooling energy storage. The second heat exchange tube 42 is only used to transfer heat to the heating equipment, and there is no interference between energy storage and energy use.

[0059] In some embodiments, the plurality of heat exchangers 40 include an energy storage heat exchanger 401 and an energy consumption heat exchanger 402. The energy storage heat exchanger 401 is used to connect with an external heat source to form an energy storage loop, and the energy storage loop is used to transfer heat to the foundation soil 20 in the energy storage space for storage. The energy consumption heat exchanger 402 is used to connect with a heating device to form an energy consumption loop, and the energy consumption loop is used to transfer the energy stored in the foundation soil to the heating device for use.

[0060] Thus, the heat from the external heat source can be transferred to the foundation soil 20 for storage through the energy storage heat exchanger 401, and the energy stored in the foundation soil 20 can be transferred to the heating equipment through the energy consumption heat exchanger 402. Energy storage and energy consumption can be carried out simultaneously, and since energy storage and energy consumption are not carried out in the same first pile foundation 30, mutual interference can be reduced when energy storage and energy consumption are carried out simultaneously.

[0061] In some embodiments, the energy storage heat exchanger 401 is arranged adjacent to the energy consumption heat exchanger 402, so that the heat stored in the foundation soil 20 can be transferred to the energy consumption heat exchanger 402 through a shorter path.

[0062] Secondly, this application provides a heating, ventilation, and air conditioning (HVAC) device, which includes a heating device and an energy storage device 100 as described above. The heating device is connected to a heat exchanger 40.

[0063] The beneficial effects of the HVAC equipment in this embodiment are the same as those of the energy storage device 100, and will not be repeated here.

[0064] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized by, The energy storage device, used in HVAC equipment, includes: A thermal insulation structure is used to be buried in the foundation soil, and the thermal insulation structure is used to enclose an energy storage space, the energy storage space is used to contain the foundation soil, and the thermal insulation structure is used to prevent the energy in the energy storage space from being lost to the outside. Multiple first piles are used to be buried in the foundation soil within the energy storage space; Multiple heat exchangers are provided, one of which is embedded in one of the first pile foundations, and the heat exchanger is used to exchange heat with the foundation soil in the energy storage space.

2. The energy accumulating device according to claim 1, wherein The energy storage device includes a first pile foundation group, the first pile foundation group includes a plurality of first pile foundations, and the thermal insulation structure includes: The bottom insulation layer is embedded in the foundation soil and located below the first pile group; A lateral heat insulation layer is embedded in the foundation soil and located on the side of the first pile group, extending around the first pile group. The top insulation layer is buried in the foundation soil and located above the first pile foundation group. The top insulation layer, the side insulation layer and the bottom insulation layer together form the energy storage space.

3. The energy storage device of claim 2, wherein, The energy storage device also includes a plurality of second piles, which are all buried in the foundation soil and arranged in a circle around the first pile group at intervals. The plurality of second piles are all connected to the side insulation layer.

4. The energy storage device according to claim 1, characterized in that, The heat exchanger is used to connect to an external heat source and heating equipment. The heat exchanger and the external heat source form an energy storage loop, which is used to transfer energy to the foundation soil in the energy storage space for storage. The heat exchanger and the heating equipment form an energy circuit, which is used to transfer the energy stored in the foundation soil to the heating equipment.

5. The energy storage device of claim 4, wherein, The heat exchanger includes a first heat exchange tube, which is buried in the first pile foundation. The first heat exchange tube is used to connect with the external heat source to form the energy storage circuit and the energy consumption circuit. The first heat exchange tube is also used to connect with the heating equipment to form the energy consumption circuit.

6. The energy accumulating device according to claim 4, wherein The heat exchanger includes: The first heat exchange tube is buried in the first pile foundation and is used to communicate with the external heat source. The first heat exchange tube and the external heat source form the energy storage circuit. The second heat exchange pipe is buried in the first pile foundation and is used to connect with the heating equipment, forming an energy circuit with the heating equipment.

7. The energy accumulating device according to claim 5 or 6, characterized in that, The first heat exchange tube includes a first tube section, a second tube section, and a third tube section connected in sequence; The first pipe segment is at least partially located outside the first pile foundation, and the first pipe segment extends toward the bottom of the first pile foundation in a first direction; The second pipe section is buried in the first pile foundation, and the second pipe section extends along the second direction, which is set at an angle to the first direction; The third pipe segment extends toward the top of the first pile foundation in the opposite direction to the first direction, and the third pipe segment extends at least partially beyond the first pile foundation.

8. The energy accumulating device of claim 1, wherein The plurality of heat exchangers include an energy storage heat exchanger and an energy consumption heat exchanger; The energy storage heat exchanger is used to connect with an external heat source to form an energy storage loop, and the energy storage loop is used to transfer energy to the foundation soil in the energy storage space for storage. The energy heat exchanger is used to connect with the heating equipment to form an energy circuit, and the energy circuit is used to transfer the energy stored in the foundation soil to the heating equipment.

9. The energy storage device of claim 8, wherein, The energy storage heat exchanger is arranged adjacent to the energy consumption heat exchanger.

10. A heating and ventilation device, characterized by It includes heating equipment and an energy storage device as described in any one of claims 1-9, wherein the heating equipment is connected to the heat exchanger.

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