A water energy storage system utilizing thermocline

Abstract

The application discloses a kind of water energy storage systems using thermocline, it is related to energy power technology field.The present application includes energy storage pond, air conditioning circulating pond and air conditioning circulating system, energy storage pond includes pool body, pool body is fixed with several heat exchangers from front to back in step shape in sequence, pool body is evenly provided with several electric heaters, pool body outside is connected with refrigerating unit, the lower part of pool body is fixed with the first main pipe and the second main pipe with one end sealed.The present application is used for the heat exchange of medium in air conditioning circulating pond by the design of energy storage pond, the arrangement of heat exchanger is carried out in step shape in energy storage pond, in the process of refrigeration or heating, the start of heat exchanger is carried out in sequence, the heat exchange of medium in air conditioning circulating pond is carried out by the technology of thermocline, and the energy storage effect is better, which is beneficial to the temperature control in air conditioning circulating pond, to ensure that heat exchange process is always in high-efficiency stable state.

Description

Technical Field

[0001] This invention belongs to the field of energy and power technology, and in particular relates to a water energy storage system utilizing a thermocline. Background Technology

[0002] For heat exchange in existing large buildings, the air conditioning circulation system mainly consists of air conditioning terminals and air conditioning heat exchangers. The air conditioning heat exchangers are installed in the air conditioning circulating water tank. The heat exchangers exchange heat between the medium in the terminal body and the medium in the circulating water tank. Heating modules and cooling modules are installed in the circulating water tank for heating or cooling the medium in the circulating water tank.

[0003] Because the air conditioning heat exchanger occupies a small volume in the circulating water tank, the medium capacity in the circulating water tank is relatively small, making it impossible to continuously exchange heat for a long time. This results in low efficiency and poor energy storage. In addition, the air conditioning heat exchanger is in a fixed position, and the medium temperature near the heat exchanger in the circulating water tank is exchanged first. Even if a circulation or flow guiding mechanism is set in the water tank, the medium temperature far from the heat exchanger still cannot be exchanged quickly, resulting in poor temperature stability and making it difficult to control.

[0004] Therefore, designing an energy storage system with high energy storage efficiency and improved heat exchange temperature stability is a problem that needs to be solved by those working in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a water energy storage system utilizing a thermocentric layer. The system uses a water storage tank for heat exchange of the medium in an air conditioning circulating water tank. The heat exchangers are arranged in a stepped manner in the water storage tank. During the cooling or heating process, the heat exchangers are activated sequentially. The heat exchange of the medium in the air conditioning circulating water tank is achieved through thermocentric layer technology, resulting in good energy storage effect and facilitating temperature control within the air conditioning circulating water tank, ensuring that the heat exchange process is always in a highly efficient and stable state.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] This invention relates to a water energy storage system utilizing a thermocline, comprising an energy storage tank, an air conditioning circulating water tank, and an air conditioning circulation system;

[0008] The energy storage tank includes a tank body, in which several heat exchangers are fixed in a stepped manner from front to back, and several electric heaters are evenly arranged in the tank body. A refrigeration unit is connected to the outside of the tank body.

[0009] The lower part of the pool body is fixed with a first main pipe and a second main pipe with one end sealed. The other ends of the first main pipe and the second main pipe are respectively connected to the inlet and outlet of the air conditioning circulating water pool.

[0010] The water inlet of the internal medium channel of several heat exchangers is connected in parallel to the second main pipe through a first branch pipe. An electric switch valve is provided on the first branch pipe, and a first pump body is provided on the second main pipe.

[0011] The outlet end of the internal medium channel of several heat exchangers is connected in parallel with the first main channel through a second branch pipe, and a one-way valve is provided on the second branch pipe;

[0012] The air conditioning circulation system includes an air conditioning heat exchanger and a terminal system. The terminal system is connected to the inlet and outlet of the internal medium channel of the air conditioning heat exchanger through an inlet water pipe and an outlet water pipe. The air conditioning heat exchanger is fixed in the air conditioning circulation water tank. A second pump body is provided on the outlet water pipe.

[0013] Furthermore, a first medium circulates in the internal medium channels of several heat exchangers, the first main pipe, the second main pipe, and the air conditioning circulating water tank, and a second medium is provided in the energy storage tank. The first medium in several heat exchangers exchanges heat with the second medium in the energy storage tank.

[0014] Furthermore, a third medium circulates within the internal medium channels of the terminal system, the inlet water pipe, the outlet water pipe, and the air conditioning heat exchanger, and the third medium in the air conditioning heat exchanger exchanges heat with the first medium in the air conditioning circulating water pool.

[0015] Furthermore, the terminal system consists of several terminal bodies, and the water outlets and inlets of the several terminal bodies are connected in parallel to the water inlet main pipe and the water outlet main pipe, respectively.

[0016] Furthermore, the inlet of the air conditioning circulating water tank is located on the upper outer side of the air conditioning circulating water tank, and the outlet of the air conditioning circulating water tank is located on the lower outer side of the air conditioning circulating water tank.

[0017] Furthermore, it also includes a control device, which includes a processor and several control units, and several of the electric switching valves, the first pump body and the second pump body are electrically connected to the processor.

[0018] Furthermore, a number of temperature sensors are fixed inside the pool, each of which is at the same height as the heat exchanger and is electrically connected to the processor.

[0019] Furthermore, the refrigeration unit is a refrigeration compressor unit, which is used for refrigerating the second medium in the energy storage tank.

[0020] Furthermore, both the outer walls of the energy storage tank and the air conditioning circulating water tank are provided with insulation layers, and the first main pipe, the second main pipe, the inlet main pipe, and the outlet main pipe are all antifreeze fittings.

[0021] Furthermore, the volume of the energy storage tank is larger than that of the air conditioning circulating water tank, and the energy storage tank is a well-type underground water tank or an insulated water tank.

[0022] The present invention has the following beneficial effects:

[0023] 1. This invention utilizes an energy storage tank design for heat exchange of the medium within an air conditioning circulating water tank. The energy storage tank features a stepped arrangement of heat exchangers, which are activated sequentially during cooling or heating. The heat exchange of the medium in the air conditioning circulating water tank is achieved through the principle that hot water density is lower than cold water density, i.e., a thermocline technique. This results in good energy storage performance, facilitates temperature control within the air conditioning circulating water tank, and provides strong temperature stability, ensuring that the heat exchange process remains in a highly efficient and stable state.

[0024] 2. This invention utilizes a newly added energy storage tank to heat or cool the medium within the tank during off-peak electricity hours. This allows the heat or cold energy to be transferred to the air conditioning circulating water tank via a heat exchanger during peak electricity hours. Compared to using the air conditioning circulating water tank alone for heat exchange, this greatly increases the heat exchange capacity, ensuring long-term cooling or heating with high efficiency.

[0025] 3. This invention utilizes a large number of heat exchangers in a storage tank, enabling the simultaneous activation of multiple heat exchangers when there is a high demand for cooling or heating. This makes it widely applicable, suitable for large buildings, and avoids the problem of insufficient heat exchange effect and efficiency caused by low power.

[0026] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a water energy storage system utilizing a thermocline according to the present invention;

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1-Storage water tank, 2-Air conditioning circulating water tank, 3-Air conditioning circulating system, 4-First main pipe, 5-Second main pipe, 101-Tank body, 102-Heat exchanger, 301-Air conditioning heat exchanger, 302-Terminal system, 303-Inlet main pipe, 304-Outlet main pipe, 305-Second pump body, 401-Second branch pipe, 402-Check valve, 501-First branch pipe, 502-Electric switch valve, 503-First pump body. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1 As shown, the present invention is a water energy storage system utilizing a thermocline, comprising an energy storage tank 1, an air conditioning circulating water tank 2, and an air conditioning circulating system 3;

[0033] The energy storage tank 1 includes a tank body 101. Several heat exchangers 102 are fixed in a stepped manner from front to back inside the tank body 101. Several electric heaters are evenly arranged inside the tank body 101. A refrigeration unit is connected to the outside of the tank body 101.

[0034] A first main pipe 4 and a second main pipe 5 with one end sealed are fixed in the lower part of the pool body 101. The other ends of the first main pipe 4 and the second main pipe 5 are respectively connected to the inlet and outlet of the air conditioning circulating water pool 2.

[0035] The water inlet end of the internal medium channel of several heat exchangers 102 is connected in parallel with the second main pipe 5 through the first branch pipe 501. The first branch pipe 501 is equipped with an electric switch valve 502, and the second main pipe 5 is equipped with a first pump body 503.

[0036] The outlet end of the internal medium channel of several heat exchangers 102 is connected in parallel with the first main pipe 4 through the second branch pipe 401, and a one-way valve 402 is provided on the second branch pipe 401.

[0037] The air conditioning circulation system 3 includes an air conditioning heat exchanger 301 and a terminal system 302. The terminal system 302 is connected to the inlet and outlet of the internal medium channel of the air conditioning heat exchanger 301 through the inlet water pipe 303 and the outlet water pipe 304. The air conditioning heat exchanger 301 is fixed in the air conditioning circulating water tank 2. A second pump body 305 is provided on the outlet water pipe 304.

[0038] Among them, such as Figure 1As shown, a first medium circulates in the internal medium channels of several heat exchangers 102, the first main pipe 4, the second main pipe 5 and the air conditioning circulating water tank 2, and a second medium is provided in the energy storage tank 1. The first medium in several heat exchangers 102 exchanges heat with the second medium in the energy storage tank 1.

[0039] Among them, such as Figure 1 As shown, a third medium circulates in the internal medium channels of the terminal system 302, the inlet water pipe 303, the outlet water pipe 304, and the air conditioning heat exchanger 301. The third medium in the air conditioning heat exchanger 301 exchanges heat with the first medium in the air conditioning circulating water pool 2.

[0040] Among them, such as Figure 1 As shown, the terminal system 302 consists of several terminal bodies, and the water outlets and water inlets of the several terminal bodies are connected in parallel to the water inlet main pipe 303 and the water outlet main pipe 304, respectively.

[0041] Among them, such as Figure 1 As shown, the inlet of the air conditioning circulating water tank 2 is located on the upper part of the outer side of the air conditioning circulating water tank 2, and the outlet of the air conditioning circulating water tank 2 is located on the lower part of the outer side of the air conditioning circulating water tank 2.

[0042] It also includes a control device, which includes a processor and several control units. Several electric switching valves 502, a first pump body 503 and a second pump body 305 are all electrically connected to the processor.

[0043] Several temperature sensors are fixed inside the pool body 101. The temperature sensors are at the same height as the heat exchanger 102 and are electrically connected to the processor.

[0044] The refrigeration unit is a refrigeration compressor unit, which is used to refrigerate the second medium in the energy storage tank 1.

[0045] Among them, the outer walls of the energy storage tank 1 and the air conditioning circulating water tank 2 are both equipped with heat insulation layers, and the first main pipe 4, the second main pipe 5, the inlet main pipe 303 and the outlet main pipe 304 are all antifreeze pipe fittings.

[0046] Among them, the volume of the energy storage tank 1 is larger than the volume of the air conditioning circulating water tank 2, and the energy storage tank 1 is a well-type underground water tank or an insulated water tank.

[0047] The first, second, and third media are primarily water or other fluids. When a higher temperature is required, oil-based fluids can be selected. To prevent the media from solidifying, antifreeze materials can be mixed into the media or other fluid media with lower solidification temperatures can be selected.

[0048] The working principle of this invention is as follows:

[0049] During the heat storage process (such as in winter), the electric heater is activated during off-peak hours to uniformly heat and store the second medium in the energy storage tank 1. The temperature is monitored in real time by a temperature sensor, and heating is provided during peak hours. The specific heating process is as follows: the electric switch valves 502 on the heat exchanger 102 are opened sequentially from top to bottom. Figure 1 As shown, if the power drops to a set threshold, heat exchanger 1, heat exchanger 2... heat exchanger n will be turned on in sequence.

[0050] The reason for sequential activation is as follows: After heat exchanger 1 completes heat exchange, the cold water in the energy storage tank 1, due to its high density, will slowly move towards the bottom of the tank 1 without disrupting the temperature slope layer. Furthermore, the temperature slope layer will gradually move upwards. Because of the presence of the temperature slope layer, the water temperature distribution above heat exchanger 1 will not be affected; that is, the area above heat exchanger 1 remains at a high temperature, while the area below heat exchanger 1 remains at a low temperature (the operation of the remaining heat exchangers 102 is the same). As the usage time increases, heat exchanger 2, heat exchanger 3… heat exchanger n are activated sequentially. The temperature slope layer will gradually move upwards, ensuring that the heat exchangers currently in operation maintain high efficiency. This process is based on the technology of the temperature slope layer. In actual use, if a larger heat exchange power is required, heat exchangers 1 and 2 can be activated simultaneously, and then sequentially from bottom to top, and so on.

[0051] During the cold storage process (such as in summer), the chiller unit is started during off-peak electricity to uniformly cool and store the second medium in the energy storage tank 1. The temperature is monitored in real time by a temperature sensor, and cooling is provided during peak electricity hours. The specific cooling process is as follows: the electric switching valves 502 on the heat exchanger 102 are opened sequentially from bottom to top. Figure 1 As shown, if the power drops to the set threshold, heat exchanger n, heat exchanger n-1... heat exchanger 1 will be turned on in sequence.

[0052] The reason for sequential activation is as follows: After heat exchanger n completes heat exchange, the hot water in storage tank 1, due to its low density, will slowly move towards the top of the tank without disrupting the temperature slope layer. Furthermore, the temperature slope layer will gradually descend. Because of its presence, the water temperature distribution below heat exchanger 6 will not be affected; that is, the area below heat exchanger n remains at a low temperature, while the area above heat exchanger n remains at a high temperature (the operation of the remaining heat exchangers 102 is the same). As usage time increases, heat exchangers n-1, n-2, and so on, are activated sequentially. The temperature slope layer will gradually descend, ensuring that the currently operating heat exchangers maintain high efficiency. This process is based on the technology of the temperature slope layer. In actual use, if a larger heat exchange capacity is required, heat exchangers n and n-1 can be activated simultaneously, and then sequentially from top to bottom, and so on.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A water energy storage system utilizing a thermocline, characterized in that: It includes a storage tank (1), an air conditioning circulating water tank (2), and an air conditioning circulation system (3); The energy storage tank (1) includes a tank body (101), and a number of heat exchangers (102) are fixed in a stepped manner from front to back inside the tank body (101). A number of electric heaters are uniformly arranged inside the tank body (101), and a refrigeration unit is connected to the outside of the tank body (101). The lower part of the pool body (101) is fixed with a first main pipe (4) and a second main pipe (5) with one end sealed. The other ends of the first main pipe (4) and the second main pipe (5) are respectively connected to the inlet and outlet of the air conditioning circulating water pool (2). The water inlet end of the internal medium channel of several heat exchangers (102) is connected in parallel with the second main pipe (5) through a first branch pipe (501). An electric switch valve (502) is provided on the first branch pipe (501), and a first pump body (503) is provided on the second main pipe (5). The outlet end of the internal medium channel of several heat exchangers (102) is connected in parallel with the first main pipe (4) through a second branch pipe (401), and a one-way valve (402) is provided on the second branch pipe (401). The air conditioning circulation system (3) includes an air conditioning heat exchanger (301) and a terminal system (302). The terminal system (302) is connected to the inlet and outlet of the internal medium channel of the air conditioning heat exchanger (301) through the inlet pipe (303) and the outlet pipe (304). The air conditioning heat exchanger (301) is fixed in the air conditioning circulation water tank (2). A second pump body (305) is provided on the outlet pipe (304).

2. The water energy storage system utilizing a thermocline according to claim 1, characterized in that, The heat exchangers (102) have a first medium circulating in their internal medium channels, first main pipe (4), second main pipe (5) and air conditioning circulating water tank (2), and the energy storage tank (1) has a second medium. The first medium in the heat exchangers (102) exchanges heat with the second medium in the energy storage tank (1).

3. A water energy storage system utilizing a thermocline according to claim 2, characterized in that, The terminal system (302), the inlet water pipe (303), the outlet water pipe (304) and the air conditioning heat exchanger (301) have a third medium circulating in their internal medium channels. The third medium in the air conditioning heat exchanger (301) exchanges heat with the first medium in the air conditioning circulating water pool (2).

4. A water energy storage system utilizing a thermocline according to claim 1, characterized in that, The terminal system (302) consists of several terminal bodies, and the outlets and inlets of the several terminal bodies are connected in parallel to the inlet main pipe (303) and the outlet main pipe (304).

5. A water energy storage system utilizing a thermocline according to claim 1, characterized in that, The inlet of the air conditioning circulating water tank (2) is located on the upper part of the outer side of the air conditioning circulating water tank (2), and the outlet of the air conditioning circulating water tank (2) is located on the lower part of the outer side of the air conditioning circulating water tank (2).

6. A water energy storage system utilizing a thermocline according to claim 1, characterized in that, It also includes a control device, which includes a processor and several control units, and several of the electric switching valves (502), the first pump body (503) and the second pump body (305) are electrically connected to the processor.

7. A water energy storage system utilizing a thermocline according to claim 6, characterized in that, Several temperature sensors are fixed inside the pool body (101). The temperature sensors are at the same height as the heat exchanger (102) and are electrically connected to the processor.

8. A water energy storage system utilizing a thermocline according to claim 2, characterized in that, The refrigeration unit is a refrigeration compressor unit, which is used for refrigeration of the second medium in the energy storage tank (1).

9. A water energy storage system utilizing a thermocline according to claim 1, characterized in that, The outer walls of the energy storage tank (1) and the air conditioning circulating water tank (2) are both provided with heat insulation layers. The first main pipe (4), the second main pipe (5), the inlet main pipe (303) and the outlet main pipe (304) are all antifreeze pipe fittings.

10. A water energy storage system utilizing a thermocline according to claim 1, characterized in that, The volume of the energy storage tank (1) is greater than the volume of the air conditioning circulating water tank (2), and the energy storage tank (1) is a well-type underground water tank or an insulated water tank.

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