Hydraulic compressed air energy storage power generation device system capable of enhancing heat exchange

Abstract

The utility model provides a hydraulic compressed air energy storage power generation device system capable of enhancing heat exchange. The hydraulic compressed air energy storage power generation device system comprises an air storage device, a water storage device, a water storage tank and a hydraulic power generation device. The air storage device is used for storing high-pressure air, the air storage device is communicated with the water storage device through an air expansion pipe network and an energy storage air delivery pipe network, a first spraying assembly and a second spraying assembly are arranged in the air storage device and the water storage device respectively, and the first spraying assembly and the second spraying assembly are communicated through a temperature compensation spraying pipe network; the second spraying assembly is further connected with a water storage tank through an energy storage water injection pipe network, the inlet end of the hydroelectric generation device is connected with the water storage device through an energy release water conveying pipe network, and the outlet end of the hydroelectric generation device is connected with the water storage tank. By means of a spraying mode, heat exchange between water and air is enhanced, energy loss is reduced, energy balance is achieved, and power generation efficiency is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage and power generation technology, and relates to a hydraulic compressed air energy storage and power generation device system with enhanced heat exchange. Background Technology

[0002] Currently, compressed air energy storage power generation is an important direction in the field of large-scale clean physical energy storage. By compressing air during the off-peak period of the power grid, the air molecules move more vigorously and the temperature rises, generating a large amount of heat. This heat is then stored, and during the peak period of the power grid, the compressed air is released to drive the power generation equipment to generate electricity. This process plays a positive role in peak shaving and valley filling of the power grid.

[0003] CN206135550U discloses a composite hydroelectric power generation and air compression energy storage system, including an air compressor, a hydroelectric generator, and a transformer. The air compressor is equipped with a pressure gauge and is connected to a water container. The water container is connected to the hydroelectric generator, and the hydroelectric generator is connected to the transformer. The transformer is connected to the national power grid. The hydroelectric generator is connected to a circulating water container, and the circulating water container is connected to a circulating water pump. One end of the circulating water pump is connected to the water container, and the other end of the circulating water pump is connected to the air compressor. This system has the advantages of improving the utilization efficiency of renewable energy and enabling large-scale energy storage when the power grid is at a low load.

[0004] CN208474040U discloses an air-pressurized high-pressure water energy storage device, including a water storage tower, an inlet control valve, an outlet control valve, a pumping device, an air pressurization control valve, a compressed air device, an exhaust valve, a maintenance venting valve, a hydroelectric generator set, and a power grid. The upper part of the water storage tower is connected to the air pressurization control valve and the exhaust valve, and the lower part of the water storage tower is connected to the inlet control valve and the outlet control valve. The bottom of the water storage tower is connected to the maintenance venting valve. The inlet control valve is connected to the pumping device, the outlet control valve is connected to the hydroelectric generator set, and the air pressurization control valve is connected to the compressed air device. The pumping device, the hydroelectric generator set, and the compressed air device are all connected to the power grid. The device is easy to operate, has a long service life, high energy storage density, is environmentally friendly, has a short construction period, and is quick to take effect.

[0005] To improve efficiency, existing compressed air energy storage systems employ heat storage devices to store the heat generated by compressed air. When the air expands and absorbs heat, some of the heat is then added back to the compressed air to avoid energy loss. This requires a relatively complex heat storage and heat exchange structure, resulting in high costs and significant energy efficiency losses. Furthermore, the heat exchange effect during the air compression and expansion process is poor, leading to low energy utilization.

[0006] Therefore, enhancing the heat exchange effect during air compression energy storage is crucial for improving the power generation efficiency and economic benefits of energy storage systems. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a hydraulic compressed air energy storage and power generation device system with enhanced heat exchange. On the one hand, water is used as the power generation carrier to generate electricity through hydraulic compressed air, thereby increasing the energy storage density and power generation efficiency. On the other hand, water is used as a heat storage carrier and a heat supply carrier to absorb the heat energy of compressed air and supplement the heat to the compressed air during expansion. In addition, a spray heat exchange component is added to effectively enhance the heat exchange efficiency of the system.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] This utility model provides a hydraulic compressed air energy storage and power generation system with enhanced heat exchange, including an air storage device, a water storage device, a water tank, and a hydroelectric power generation device. The air storage device is used to store high-pressure air. The air storage device is connected to the water storage device through a gas expansion pipeline network and an energy storage gas transmission pipeline network. A first spray assembly and a second spray assembly are respectively installed in the air storage device and the water storage device. The first spray assembly and the second spray assembly are connected through a heat-supplementing spray pipeline network. The heat-supplementing spray pipeline network is connected to the water storage device through a circulation branch pipe. A circulation pump is installed on the circulation branch pipe. The second spray assembly is also connected to the water tank through an energy storage water injection pipeline network. The inlet end of the hydroelectric power generation device is connected to the water storage device through an energy release water transmission pipeline network, and the outlet end of the hydroelectric power generation device is connected to the water tank.

[0010] This invention achieves high-density energy storage by tightly combining compressed air and water, and storing and releasing heat based on the compression and expansion processes of air. At the same time, the combination of a circulating pump and a spray assembly ensures full contact between water and air, achieving efficient water-air heat exchange, reducing heat loss, and ensuring that the entire system is in a near-isothermal state.

[0011] As a preferred embodiment of the present invention, the gas storage device includes at least one high-pressure gas tank, the outer peripheral wall of the high-pressure gas tank is provided with a first heat exchange component, and the first spray component is provided at the top of the inner cavity of the high-pressure gas tank.

[0012] The water storage device includes several closed water tanks arranged in parallel. A second heat exchange component is provided on the outer peripheral wall of the closed water tank, and the second spray component is located at the top of the inner cavity of the closed water tank.

[0013] This invention utilizes a first heat exchange component and a second heat exchange component to introduce external waste heat, which is then released into a high-pressure gas tank to heat and expand the air, thereby realizing the utilization of waste heat. At the same time, by adjusting the external air temperature, a cooling effect can be achieved based on the characteristic of air expansion and heat absorption.

[0014] As a preferred embodiment of this utility model, the two ends of the gas expansion pipeline are respectively connected to the top of the high-pressure gas tank and the top of the closed water tank, and a first regulating valve is provided on the gas expansion pipeline.

[0015] As a preferred embodiment of this utility model, the inlet and outlet ends of the energy storage gas transmission pipeline are respectively connected to the bottom of the high-pressure gas tank and the bottom of the sealed water tank, and a second regulating valve is provided on the energy storage gas transmission pipeline.

[0016] As a preferred embodiment of this utility model, the bottom of the sealed water tank is provided with a connecting branch pipe, which is connected to the outlet end of the energy storage gas transmission network and the inlet end of the circulation branch pipe respectively, and a third regulating valve is provided on the connecting branch pipe.

[0017] As a preferred technical solution of this utility model, the two ends of the energy-releasing water pipeline are respectively connected to the bottom of the closed water tank and the hydroelectric power generation device, and a fourth regulating valve is provided on the energy-releasing water pipeline.

[0018] As a preferred embodiment of this utility model, the high-pressure gas tank and the sealed water tank are each equipped with a pressure detection component.

[0019] As a preferred embodiment of this utility model, the second spray assembly is provided with a mixing branch pipe, which is connected to the outlet end of the energy storage water injection network and the heat replenishment spray network respectively. The heat replenishment spray network and the energy storage water injection network are respectively provided with a fifth regulating valve and a sixth regulating valve.

[0020] As a preferred embodiment of this utility model, a high-pressure water pump is also installed on the energy storage water injection pipeline.

[0021] As a preferred embodiment of the present invention, the hydroelectric power generation device includes a water turbine.

[0022] This invention utilizes water as a power carrier to drive a water turbine to generate electricity, which greatly improves power generation efficiency compared to an air expander.

[0023] The system refers to an equipment system, device system, or production device.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This invention provides a hydraulic compressed air energy storage and power generation system with enhanced heat exchange. By ensuring full contact between water and high-pressure air, it absorbs and stores the heat generated during air compression, thereby reducing the energy consumption of the booster equipment. Simultaneously, it utilizes hydraulic power to generate electricity, significantly improving power generation efficiency. Furthermore, the design employs a circulating pump combined with an atomizing spray assembly to replenish the stored heat to the compressed air, achieving near-isothermal conditions during air compression and expansion, maintaining energy balance, enhancing the heat exchange effect between water and air, reducing heat loss, decreasing the power consumption of the circulating pump, and improving the energy utilization rate during air compression and expansion. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the enhanced heat exchange hydraulic compressed air energy storage and power generation device system provided in Embodiment 1 of this utility model.

[0027] Among them, 1-high pressure gas tank; 101-first spray assembly; 102-first heat exchange assembly; 21-first closed water tank; 22-second closed water tank; 23-third closed water tank; 201-second spray assembly; 202-second heat exchange assembly; 203-mixing branch pipe; 204-connecting branch pipe; 3-water storage tank; 4-hydropower generation device; 5-circulating pump; 6-high pressure water supply pump; 7-gas expansion pipeline; 8-energy storage gas transmission pipeline; 9-energy release water transmission pipeline; 10-energy storage water injection pipeline; 11-heat replenishment spray pipeline; k1-first regulating valve; k2-second regulating valve; k3-third regulating valve; k4-fourth regulating valve; k5-fifth regulating valve; k6-sixth regulating valve. Detailed Implementation

[0028] It should be understood that in the description of this utility model, the terms "center," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for 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, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] In one specific embodiment, this utility model provides a hydraulic compressed air energy storage and power generation system with enhanced heat exchange, including a gas storage device, a water storage device, a water tank, and a hydroelectric power generation device. The gas storage device stores high-pressure air, which can be supplied with pressurized air by an external air compressor. The gas storage device is connected to the water storage device via a gas expansion pipeline network and an energy storage gas transmission pipeline network. When gas is injected into the gas storage device, the high-pressure air can enter the water storage device through the energy storage gas transmission pipeline network, thus filling the water storage device with high-pressure air as well. After hydraulic compression of the high-pressure air, it expands and returns to the gas storage device through the gas expansion pipeline network to achieve energy storage. A first spray assembly and a second spray assembly are respectively installed in the gas storage device and the water storage device, respectively. The first spray assembly and the second spray assembly are connected through a heat-supplementing spray pipeline network. The heat-supplementing spray pipeline network is connected to the water storage device through a circulation branch pipe, on which a circulation pump is installed. The second spray assembly is also connected to the water tank through an energy storage water injection pipeline network. When hydraulically compressing high-pressure air for energy storage, water from the storage tank is sprayed into the water storage device via an energy storage water injection network. This allows for thorough heat exchange between the water and the high-pressure air within the water storage device, absorbing the heat generated by air compression. When the compressed air expands and releases heat, a circulating pump sprays the water storing heat from the storage device into the air storage device through a circulating branch pipe, ensuring further heat exchange and replenishing the stored heat to the high-pressure air. This achieves near-isothermal operation throughout the air compression and expansion processes. The inlet of the hydroelectric power generation device is connected to the water storage device via an energy release water supply network, and the outlet of the hydroelectric power generation device is connected to the storage tank. During operation, the compressed air in the water storage device expands, driving the water in the storage device to stimulate the hydroelectric power generation device and generate electricity. When hydropower is generated, the air expands and absorbs heat. This invention uses a circulating pump to draw water from the water storage device and deliver it to the first spray assembly. The water mist is sprayed into the air storage device in the form of atomized spray to release heat into the air. In this way, the heat generated by compression is returned to the air, achieving a near-isothermal process.

[0032] In some embodiments, the gas storage device includes at least one high-pressure gas tank, which is a closed pressure vessel. This invention does not specifically limit the number, volume, or shape of the high-pressure gas tanks; those skilled in the art can adjust them according to actual conditions. The first spray assembly is disposed at the top of the inner cavity of the high-pressure gas tank, releasing heat into the air inside the high-pressure gas tank in the form of water mist to achieve heat replenishment. A first heat exchange assembly is disposed on the outer peripheral wall of the high-pressure gas tank. When there is residual heat outside, it can be exchanged through the first heat exchange assembly to replenish heat to the air and water inside the high-pressure gas tank, achieving waste heat utilization. When external cooling is required, during system energy release, room-temperature air releases heat into the high-pressure gas tank through the first heat exchange assembly, thereby being cooled to form cold air for utilization. This invention does not specifically limit the structure of the first heat exchange assembly; those skilled in the art can select an appropriate heat exchange assembly according to actual process requirements. For example, the first heat exchange assembly can be a shell structure sleeved on the high-pressure gas tank, or a tubular structure spirally wound around the outer peripheral wall of the high-pressure gas tank, or other structures commonly used in the art.

[0033] The water storage device includes several closed water tanks arranged in parallel, employing a closed pressure vessel. This invention does not specifically limit the number, volume, or shape of the closed water tanks; those skilled in the art can adjust them according to actual conditions. The second spray assembly is located at the top of the inner cavity of the closed water tank, used to spray water from the storage tank into the closed water tank in the form of water mist, allowing for sufficient contact and heat exchange with the high-pressure air. A second heat exchange assembly is provided on the outer peripheral wall of the closed water tank. When there is residual heat externally, this residual heat can be exchanged through the second heat exchange assembly to replenish heat to the air and water inside the closed water tank, achieving waste heat utilization. When external cooling is required, during system energy release, ambient temperature air releases heat into the closed water tank through the second heat exchange assembly, thus being cooled and utilized. This invention does not specifically limit the structure of the second heat exchange assembly; those skilled in the art can select an appropriate heat exchange assembly according to actual process requirements. For example, the second heat exchange assembly can be a shell structure fitted onto the closed water tank, a tubular structure spirally wound around the outer peripheral wall of the closed water tank, or other structures commonly used in the art.

[0034] Furthermore, the high-pressure gas tank and the sealed water tank are independently equipped with pressure detection components for detecting the real-time pressure inside the high-pressure gas tank and the sealed water tank, respectively.

[0035] In some embodiments, the two ends of the gas expansion pipeline are respectively connected to the top of the high-pressure gas tank and the top of the sealed water tank for air expansion and flow during energy release. A first regulating valve is provided on the gas expansion pipeline. Depending on the number of high-pressure gas tanks and sealed water tanks, the gas expansion pipeline can be composed of multiple expansion branch pipes connected in parallel to connect the high-pressure gas tanks and sealed water tanks, and each expansion branch pipe is independently equipped with a first regulating valve for control. The first regulating valve can be a manual valve, an electric valve, or a solenoid valve; this invention does not specifically limit its application.

[0036] In some embodiments, the inlet and outlet ends of the energy storage gas transmission pipeline are connected to the bottom of the high-pressure gas tank and the bottom of the sealed water tank, respectively. High-pressure air is injected into the high-pressure gas tank via an air compressor, and the high-pressure air flows through the energy storage gas transmission pipeline into the sealed water tank. Gas injection stops once a set pressure is reached. A second regulating valve is installed on the energy storage gas transmission pipeline for control. The second regulating valve can be a manual valve, an electric valve, or a solenoid valve; this invention does not specifically limit its application.

[0037] In some embodiments, a connecting branch pipe is provided at the bottom of the sealed water tank. The connecting branch pipe is connected to the outlet end of the energy storage gas transmission network and the inlet end of the circulation branch pipe, respectively. A third regulating valve is provided on the connecting branch pipe. The third regulating valve can be a manual valve, an electric valve, or a solenoid valve, and this utility model does not specifically limit it. During application, by switching the second regulating valve and the third regulating valve, before energy storage, the high-pressure air in the high-pressure gas tank flows sequentially through the energy storage gas transmission network and the connecting branch pipe before entering the sealed water tank; during energy release, the water containing heat stored in the sealed water tank flows sequentially through the connecting branch pipe and the circulation branch pipe before entering the first spray assembly in the high-pressure gas tank, releasing heat in the form of spray to achieve temperature replenishment.

[0038] In some embodiments, the two ends of the energy-releasing water supply network are respectively connected to the bottom of the sealed water tank and the hydroelectric power generation device, and a fourth regulating valve is provided on the energy-releasing water supply network. Depending on the number of sealed water tanks, the energy-releasing water supply network can be composed of multiple parallel water supply branch pipes for connecting the sealed water tanks and the hydroelectric power generation device, and each water supply branch pipe is independently equipped with a fourth regulating valve for control. The fourth regulating valve can be a manual valve, an electric valve, or a solenoid valve, and this utility model does not specifically limit it in this regard.

[0039] Furthermore, the hydroelectric power generation device includes a water turbine. Those skilled in the art should understand that the hydroelectric power generation device of this invention also necessarily includes necessary pipelines, conventional valves, and general-purpose pumps for achieving complete process operation. However, these are not considered major improvements of this invention. Those skilled in the art can add layouts based on the process flow and equipment structure selection; this invention does not impose special requirements or specific limitations in this regard.

[0040] In some embodiments, a high-pressure water pump is also installed on the energy storage water injection network. By activating the high-pressure water pump, water from the storage tank is drawn and injected into the compressed air within the water storage device for energy storage. A second spray assembly located within the water storage device is equipped with a mixing branch pipe, which connects the outlet end of the energy storage water injection network to the heat replenishment spray network. The heat replenishment spray network and the energy storage water injection network are each independently equipped with a fifth regulating valve and a sixth regulating valve. By switching the fifth and sixth regulating valves, the system's heat replenishment and water injection processes are achieved. Depending on the number of sealed water tanks, the energy storage water injection network can be composed of multiple parallel water injection branch pipes connecting the sealed water tanks and the storage tank, and each water injection branch pipe is independently equipped with a sixth regulating valve for control. The fifth and sixth regulating valves are independently manual valves, electric valves, or solenoid valves, and this invention does not specifically limit their application.

[0041] The device system of this utility model is also equipped with necessary connecting pipelines and switch control valves. This utility model does not make any special limitations on these. Those skilled in the art should reasonably adjust, add or delete them according to actual production needs. It should be noted that new technical solutions generated by deleting some unnecessary connecting pipelines and switch control valves, or replacing single-function switch control valves with multi-function integrated control valves, or using external automatic control systems electrically connected to the switch control valves to control the opening of the corresponding valves, etc., which are common and well-known technical means by those skilled in the art, also fall within the scope of disclosure and protection of this utility model.

[0042] Example 1

[0043] This embodiment provides a hydraulic compressed air energy storage and power generation system with enhanced heat exchange, including an air storage device, a water storage device, a water tank 3, and a hydraulic power generation device 4. Figure 1As shown, the gas storage device includes a high-pressure gas tank 1. A first spray assembly 101 is installed at the top of the inner cavity of the high-pressure gas tank 1, and a first heat exchange assembly 102 is installed on the outer peripheral wall of the high-pressure gas tank 1. The water storage device includes a first closed water tank 21, a second closed water tank 22, and a third closed water tank 23 arranged in parallel. A second spray assembly 201 is independently installed on the inner wall of each of the three closed water tanks. A mixing branch pipe 203 is installed on the second spray assembly 201, and a second heat exchange assembly 202 is independently installed on the outer peripheral wall of each closed water tank. Pressure detection components are installed on both the high-pressure gas tank 1 and the closed water tanks.

[0044] The gas storage device is connected to the water storage device via a gas expansion pipeline network 7 and an energy storage gas transmission pipeline network 8. The gas expansion pipeline network 7 includes a first main pipe, a first expansion branch pipe, a second expansion branch pipe, and a third expansion branch pipe. One end of the first main pipe is connected to the top of the high-pressure gas tank 1, and the other end is connected to the first, second, and third expansion branch pipes respectively. The first expansion branch pipe is connected to the top of the first sealed water tank 21, the second expansion branch pipe is connected to the top of the second sealed water tank 22, and the third expansion branch pipe is connected to the top of the third sealed water tank 23. Each of the first, second, and third expansion branch pipes is equipped with a first regulating valve k1. The bottom of each of the first, second, and third sealed water tanks 21, 22, and 23 is equipped with a connecting branch pipe 204, and each connecting branch pipe 204 is equipped with a third regulating valve k3. The inlet end of the energy storage gas transmission pipeline 8 is connected to the bottom of the high-pressure gas tank 1, and the outlet end is connected to the connecting branch pipes 204 of the first closed water tank 21, the second closed water tank 22 and the third closed water tank 23 respectively. The energy storage gas transmission pipeline 8 is also equipped with a second regulating valve k2.

[0045] The hydroelectric power generation device 4 includes a water turbine. The inlet end of the hydroelectric power generation device 4 is connected to a water storage device through an energy release water transmission network 9, and its outlet end is connected to a water storage tank 3. The energy release water transmission network 9 includes a second main pipe, a first water transmission branch pipe, a second water transmission branch pipe, and a third water transmission branch pipe. One end of the third main pipe is connected to the hydroelectric power generation device 4, and the other end is connected to the first water transmission branch pipe, the second water transmission branch pipe, and the third water transmission branch pipe, respectively. The first water transmission branch pipe is connected to the bottom of the first closed water tank 21, the second water transmission branch pipe is connected to the bottom of the second closed water tank 22, and the third water transmission branch pipe is connected to the bottom of the third closed water tank 23. A fourth regulating valve k4 is installed on the first water transmission branch pipe, the second water transmission branch pipe, and the third water transmission branch pipe.

[0046] The water storage device is also connected to the water storage tank 3 through the energy storage water injection network 10. The energy storage water injection network 10 includes a third main pipe, a first water injection branch pipe, a second water injection branch pipe, and a third water injection branch pipe. One end of the second main pipe is connected to the water storage tank 3, and the other end is connected to the first water injection branch pipe, the second water injection branch pipe, and the third water injection branch pipe, respectively. A high-pressure water pump 6 is installed on the second main pipe. The first water injection branch pipe is connected to the mixing branch pipe 203 on the second spray assembly 201 inside the first closed water tank 21. The second water injection branch pipe is connected to the mixing branch pipe 203 on the second spray assembly 201 inside the second closed water tank 22. The third water injection branch pipe is connected to the mixing branch pipe 203 on the second spray assembly 201 inside the third closed water tank 23. A sixth regulating valve k6 is installed on the first water injection branch pipe, the second water injection branch pipe, and the third water injection branch pipe.

[0047] The first spray assembly 101 and the second spray assembly 201 are connected by a supplementary heating spray network 11. The supplementary heating spray network 11 includes a fourth main pipe, a first supplementary heating branch pipe, a second supplementary heating branch pipe, and a third supplementary heating branch pipe. One end of the fourth main pipe is connected to the first spray assembly 101 of the high-pressure gas tank 1, and the other end is connected to the first supplementary heating branch pipe, the second supplementary heating branch pipe, and the third supplementary heating branch pipe, respectively. The first supplementary heating branch pipe is connected to the mixing branch pipe 203 on the second spray assembly 201 inside the first sealed water tank 21. The second supplementary heating branch pipe is connected to the mixing branch pipe 203 on the second spray assembly 201 inside the second sealed water tank 22. The third supplementary heating branch pipe is connected to the mixing branch pipe 203 on the second spray assembly 201 inside the third sealed water tank 23. A fifth regulating valve k5 is provided on each of the first, second, and third supplementary heating branch pipes.

[0048] The working principle of the enhanced heat exchange hydraulic compressed air energy storage and power generation device system provided in this embodiment includes:

[0049] During energy storage, high-pressure air is injected into the high-pressure air tank 1, the first sealed water tank 21, the second sealed water tank 22, and the third sealed water tank 23, so that the air inside the tanks reaches the set pressure. The high-pressure water pump 6 is turned on, and water in the water storage tank 3 is drawn and injected into the second spray assembly 201 in the first sealed water tank 21, the second sealed water tank 22, and the third sealed water tank 23 through the energy storage water injection network 10. The water is injected into the sealed water tanks by spraying, so that it can fully exchange heat with the compressed air and absorb the heat generated by the air compression, thus completing the water injection energy storage.

[0050] During energy release, the compressed air in the high-pressure gas tank 1 expands, pushing the water in the sealed water tank through the energy release water pipeline into the hydroelectric power generation device 4, driving it to perform work and generate electricity. After the work is completed, the water flows into the water storage tank 3, completing the energy release and power generation process. During the energy release process, the circulation pump 5 is turned on, injecting water containing heat into the high-pressure gas tank 1 through the first spray assembly 101 for sufficient heat exchange, so as to release the stored heat into the compressed air for reheating, achieving an approximately isothermal overall process for air compression and expansion.

[0051] Waste heat utilization and external refrigeration: During the expansion and work done by compressed air, external waste heat is introduced through the first heat exchange component 102 and the second heat exchange component 202, and released into the high-pressure air tank 1 and the sealed water tank to heat the expanding air, thus realizing waste heat utilization. Additionally, the external air temperature is adjusted by utilizing the characteristic of air expansion absorbing heat; ambient temperature air is introduced into the first heat exchange component 102 and the second heat exchange component 202, causing the ambient temperature air to decrease and form cold air, thus achieving a refrigeration effect.

[0052] This invention uses water as both a heat storage and heat release medium. During air compression, water absorbs heat to store energy, and during air expansion, it releases heat to generate electricity. Because water has a higher specific heat than air, and its mass is much greater, the temperature rise and fall during heat absorption and release are relatively small, making the entire system approximately isothermal. Furthermore, using water as the work medium to compress air and drive a water turbine to generate electricity saves on heat storage and exchange equipment and improves power generation efficiency through direct heat exchange.

[0053] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A hydraulic compressed air energy storage and power generation system with enhanced heat exchange, characterized in that, The system includes a gas storage device, a water storage device, a water tank, and a hydroelectric power generation device. The gas storage device stores high-pressure air. The gas storage device is connected to the water storage device via a gas expansion pipeline network and an energy storage gas transmission pipeline network. The gas storage device and the water storage device are respectively equipped with a first spray assembly and a second spray assembly. The first spray assembly and the second spray assembly are connected via a supplementary heating spray pipeline network. The supplementary heating spray pipeline network is connected to the water storage device via a circulation branch pipe. A circulation pump is installed on the circulation branch pipe. The second spray assembly is also connected to the water tank via an energy storage water injection pipeline network. The inlet end of the hydroelectric power generation device is connected to the water storage device via an energy release water transmission pipeline network. The outlet end of the hydroelectric power generation device is connected to the water tank.

2. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 1, characterized in that, The gas storage device includes at least one high-pressure gas tank, the outer peripheral wall of the high-pressure gas tank is provided with a first heat exchange component, and the first spray component is provided at the top of the inner cavity of the high-pressure gas tank. The water storage device includes several closed water tanks arranged in parallel. A second heat exchange component is provided on the outer peripheral wall of the closed water tank, and the second spray component is located at the top of the inner cavity of the closed water tank.

3. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 2, characterized in that, The two ends of the gas expansion pipeline are respectively connected to the top of the high-pressure gas tank and the top of the sealed water tank, and a first regulating valve is provided on the gas expansion pipeline.

4. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 2, characterized in that, The inlet and outlet of the energy storage gas transmission pipeline are respectively connected to the bottom of the high-pressure gas tank and the bottom of the sealed water tank, and a second regulating valve is provided on the energy storage gas transmission pipeline.

5. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 4, characterized in that, The bottom of the sealed water tank is provided with a connecting branch pipe, which is connected to the outlet end of the energy storage gas transmission pipeline and the inlet end of the circulation branch pipe respectively. A third regulating valve is provided on the connecting branch pipe.

6. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 2, characterized in that, The two ends of the energy-releasing water pipeline are respectively connected to the bottom of the closed water tank and the hydroelectric power generation device, and a fourth regulating valve is provided on the energy-releasing water pipeline.

7. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 2, characterized in that, The high-pressure gas tank and the sealed water tank are each equipped with a pressure detection component.

8. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 1, characterized in that, The second spray assembly is provided with a mixing branch pipe, which is connected to the outlet end of the energy storage water injection network and the heat replenishment spray network respectively. The heat replenishment spray network and the energy storage water injection network are respectively provided with a fifth regulating valve and a sixth regulating valve.

9. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 1, characterized in that, The energy storage water injection pipeline is also equipped with a high-pressure water pump.

10. The enhanced heat exchange hydraulic compressed air energy storage and power generation device system according to claim 1, characterized in that, The hydroelectric power generation device includes a water turbine.

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