Phase change heat storage temperature control system for gas storage

Abstract

The utility model provides a phase change heat storage temperature control system for a gas storage, which comprises the gas storage for storing compressed air, and is characterized in that the gas storage comprises a spray water circulation module for absorbing and releasing the heat of the compressed air, a heat supplementing and exchanging module for supplementing the heat of the compressed air, and a temperature measuring device. The spraying water circulation module comprises a spraying main pipe arranged at the top of the gas storage and a spraying water pool arranged at the bottom, water suction pipes are fully distributed in the spraying water pool, and the phase change heat storage module is laid on the top faces of the water suction pipes. The water suction pipe is sequentially communicated with a main path shut-off valve, a spraying water pump, a check valve and a spraying main pipe through a main path pipeline. The two ends of the heat supplementing and exchanging module communicate with the spraying water circulation module. The temperature measuring device is arranged on the inner wall of the gas storage and used for monitoring the temperature of compressed air and the temperature of spraying water in the gas storage. Through the synergistic effect of the phase change heat storage material and the spraying water circulation, the temperature of the gas storage is stabilized within a reasonable range, the thermal stress of a sealing layer is reduced, the energy storage density of compressed air is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of compressed air energy storage technology, and in particular to a phase change thermal storage temperature system for an air storage tank. Background Technology

[0002] Compressed air energy storage is currently one of the most promising new large-scale, long-term energy storage technologies. This technology utilizes surplus electricity from wind and solar power or off-peak electricity to drive compressor units, compressing atmospheric air to a high-pressure state and storing it in a gas storage facility. During the compression process, the air temperature rises, and the heat energy generated during compression is recovered. During peak electricity demand periods or times of power shortage, the stored heat energy is used to heat the compressed air released from the storage facility, driving an expander unit to perform work and power a generator. This achieves the storage and release of electrical energy. During energy storage, the air generates a large amount of heat during compression into the storage facility, causing the temperature inside the facility to rise. Without considering heat dissipation, the temperature can rise to 85°C. If airflow is poor and the temperature distribution is uneven, the local temperature can reach over 100°C. During power generation, the storage facility releases energy by venting exhaust gas. The internal gas expands and absorbs heat, causing the temperature inside the storage facility to drop. Without considering heat absorption from the surrounding rock, the temperature can drop below 0°C.

[0003] Compressed air energy storage can take the form of ground-based steel pipelines, salt caverns, or artificial chambers. To meet the flexibility and economy of power plant layout, artificial chambers are currently the most common form of storage. However, the sealing layer of artificial chamber storage is significantly affected by temperature. During operation, as the internal pressure of the artificial chamber fluctuates, the internal temperature also fluctuates dramatically. These drastic temperature fluctuations can damage the sealing layer of the artificial chamber, reducing system lifespan. Simultaneously, temperature changes cause fluctuations in air density, affecting energy storage capacity and efficiency. Current technologies lack effective temperature control methods, resulting in low operational safety and high investment costs for the storage facilities.

[0004] In summary, providing a phase change thermal energy storage temperature control system for gas storage is crucial for improving the safety and economy of compressed air energy storage. Summary of the Invention

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a phase change thermal storage temperature control system for gas storage tanks. Through the synergistic effect of phase change thermal storage materials and spray water circulation, the system stabilizes the temperature of the gas storage tank within a reasonable range, reduces thermal stress in the sealing layer, increases the energy storage density of compressed air, and reduces energy consumption. This invention provides the following technical solution:

[0006] This utility model discloses a phase change thermal storage temperature control system for a gas storage tank, comprising a gas storage tank for storing compressed air, the gas storage tank including a spray water circulation module for absorbing and releasing heat from the compressed air, a heat exchange module for replenishing heat from the compressed air, and a temperature measuring device.

[0007] The spray water circulation module includes a spray header pipe installed at the top of the gas storage tank and a spray water pool at the bottom. The spray water pool is filled with water suction pipes, and a phase change thermal storage module is laid on the top surface of the water suction pipes. The water suction pipes are connected in sequence to the main shut-off valve, the spray water pump, the check valve, and the spray header pipe through the main pipeline.

[0008] The heat exchange module is connected to the spray water circulation module at both ends.

[0009] The temperature measuring device is installed on the inner wall of the gas storage tank to monitor the temperature of compressed air and spray water inside the gas storage tank.

[0010] By adopting the above technical solution, the phase change thermal energy storage module is immersed in a spray water tank. The high latent heat characteristic of the phase change thermal energy storage material absorbs or releases heat from the spray water. The spray water, after being atomized, ensures that the temperature of the compressed air inside the gas storage tank remains within a reasonable range, extending the service life of the gas storage tank's sealing materials and ensuring the safe operation of the gas storage tank. Simultaneously, the thermal expansion force of the compressed air is correspondingly reduced, and the resistance overcome by the compression system is also lower, reducing the energy consumption of the compression system and increasing the compressed air energy storage density, system recycling rate, and electroconversion efficiency.

[0011] While adopting the above technical solutions, this utility model may also adopt or combine the following technical solutions:

[0012] As a preferred technical solution of this utility model, the heat exchange module includes a heat exchanger and spray water inlet shut-off valves and spray water outlet shut-off valves at both ends. The spray water inlet shut-off valve is connected to the main shut-off valve through the main pipeline, and the spray water outlet shut-off valve is connected to the spray header pipe through the main pipeline. The two ends of the heat exchanger are also connected to an external low-temperature heat source and an external cold source.

[0013] By adopting the above technical solution, the heat exchange module is used to supplement the insufficient heat inside the gas storage tank.

[0014] As a preferred technical solution of this utility model, the main pipeline between the water suction pipe and the spray header is connected in series with a bypass shut-off valve and a bypass pipeline, and the bypass shut-off valve is connected in parallel with the spray water inlet shut-off valve and the spray water outlet shut-off valve.

[0015] By adopting the above technical solution, the bypass shut-off valve is controlled to achieve flexible coupling between the thermal energy changes of the gas storage tank and the heat replenishment system, thereby making use of waste heat resources and improving the overall energy utilization efficiency.

[0016] As a preferred technical solution of this utility model, the phase change thermal storage module is a multi-row circumferentially arranged support frame, which is immersed in the liquid of the spray water tank. The phase change thermal storage module absorbs heat when storing gas in the gas storage tank and releases heat when releasing gas.

[0017] By adopting the above technical solution, the phase change temperature of the phase change thermal storage material in the phase change thermal storage module is close to the ambient temperature of the underground gas storage tank, thereby reducing heat transfer between the gas storage tank and its surrounding environment.

[0018] As a preferred technical solution of this utility model, a plurality of temperature measuring devices are provided around the perimeter and center of each radial section of the gas storage tank. The temperature measuring devices are used to monitor the gas-side space temperature and the spray water-side space temperature at different locations in the gas storage tank, and to measure the temperature of the phase change thermal energy storage module by measuring the water-side space temperature.

[0019] As a preferred technical solution of this utility model, the spray header is horizontally opened with multiple downward diverging nozzles, and the nozzles spray water mist to absorb and release the heat of the compressed air in the gas storage tank.

[0020] By adopting the above technical solution, the spray water pump draws water from the spray water pool and sends it to the spray main pipe. After being atomized by the nozzle, it forms a spray-scattered water mist in the upper space of the gas storage tank, which absorbs the heat of compression and sprays the water pool.

[0021] As a preferred technical solution of this utility model, the diameter of the water suction pipe gradually increases from both ends to the middle, and multiple water suction branch pipes are evenly distributed on the outer wall of each water suction pipe.

[0022] By adopting the above technical solution, the water suction pipe is used to uniformly draw in the water flow of the spray pool, so that the water flow in each position in the pool can participate in the circulation, ensuring the uniformity of the pool temperature and the temperature of the internal phase change heat storage module.

[0023] As a preferred technical solution of this utility model, the phase change thermal storage temperature system of the gas storage tank also includes a control module connected to the temperature measuring device. The control module receives temperature data and adjusts the spray water flow rate working parameters or starts the heat exchanger to introduce external waste heat according to the preset temperature threshold through the main circuit shut-off valve, so as to optimize energy use efficiency.

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

[0025] In this invention, the phase change thermal energy storage module is immersed in a spray water tank. The high latent heat of the phase change thermal energy storage material absorbs or releases heat from the spray water. The spray water, after being atomized, ensures that the temperature of the compressed air inside the storage tank remains within a reasonable range, extending the service life of the storage tank's sealing materials and ensuring safe operation. Simultaneously, the thermal expansion force of the compressed air is reduced, lowering the resistance overcome by the compression system, reducing energy consumption, and increasing the compressed air energy storage density, system recycling rate, and electroconversion efficiency.

[0026] In this invention, the heat exchange module is connected to an external waste heat source to effectively compensate for the temperature drop of the phase change material in the gas storage tank caused by the heat conduction of the surrounding rock and the insufficient heat in the gas storage tank, thus maintaining the thermodynamic balance of the system. The spray water circulation module is combined with the heat exchange module, and through a modular heat exchange intervention mechanism, it ensures that the gas storage tank can quickly recover its working temperature through controllable heat exchange after a long period of quiescence, thus ensuring the stability and continuity of the energy storage and release cycle. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a front view of the overall structure of this utility model;

[0029] Figure 2 Is it along Figure 1 Sectional view of the AA section;

[0030] In the diagram: 1. Spray water tank; 2. Spray water; 3. Suction pipe; 4. Main shut-off valve; 5. Spray water pump; 6. Check valve; 7. Spray water circulation module; 8. Phase change heat storage module; 9. Bypass shut-off valve; 10. Bypass pipeline; 11. Main pipeline; 12. Spray header; 13. Nozzle; 14. Spray water inlet shut-off valve; 15. Spray water outlet shut-off valve; 16. Heat exchanger; 17. Gas storage tank; 18. Support frame; 19. Temperature measuring device; 20. Heat exchanger module; 21. External low-temperature heat source; 22. External cold source. Detailed Implementation

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

[0032] like Figure 1 As shown, a phase change thermal energy storage temperature control system for a gas storage tank 17 includes a gas storage tank 17 for storing compressed air. The gas storage tank 17 includes a spray water circulation module 7 for absorbing and releasing heat from the compressed air, a heat exchange module 20 for replenishing heat from the compressed air, and a temperature measuring device 19.

[0033] The spray water circulation module 7 includes a spray header pipe 12 at the top of the gas storage tank 17 and a spray water pool 1 at the bottom. The spray water pool 1 is filled with water suction pipes 3, and a phase change thermal energy storage module 8 is laid on the top surface of the water suction pipes 3. The water suction pipes 3 are connected in sequence to the main shut-off valve 4, the spray water pump 5, the check valve 6, and the spray header pipe 12 via the main pipeline 11. The spray header pipe 12 has multiple downward-radiating nozzles 13 horizontally arranged. The nozzles 13 spray water mist to absorb and release the heat of the compressed air in the gas storage tank 17. The spray water pump 5 draws water from the spray water pool 1 and sends it to the spray header pipe 12. After being atomized by the nozzles 13, water mist is formed in the upper space of the gas storage tank 17, absorbing the heat of compression and spraying the water pool 1. The diameter of the water suction pipe 3 gradually increases from both ends to the middle. The outer wall of each water suction pipe 3 is evenly distributed with multiple water suction branches. The number and diameter of the water suction pipe 3 are set to ensure that the water flow rate in each pipe section is controlled within a certain range. This is used to evenly draw water from the spray water tank 1, so that water flow in each position in the water tank can participate in circulation, ensuring the uniformity of the water tank temperature and the temperature of the internal phase change heat storage module 8.

[0034] The heat exchange module 20 is connected to the spray water circulation module 7 at both ends. The heat exchange module 20 includes a heat exchanger 16 and spray water inlet shut-off valves 14 and 15 at both ends. The spray water inlet shut-off valve 14 is connected to the main shut-off valve 7 through the main pipeline 11. The spray water outlet shut-off valve 15 is connected to the spray header pipe 12 through the main pipeline. The heat exchanger 16 is also connected to an external low-temperature heat source 21 and an external cold source 22 at both ends. This effectively compensates for the temperature drop of the phase change material in the gas storage tank and the insufficient heat in the gas storage tank caused by the heat conduction of the surrounding rock, and maintains the thermodynamic balance of the system. The spray water circulation module 7 is combined with the heat exchange module. Through a modular heat replenishment intervention mechanism, it ensures that the gas storage tank can quickly recover its working temperature through controllable heat replenishment after a long period of quiescence, thus ensuring the stability and continuity of the energy storage and release cycle. The heat source side inlet of the supplementary heat exchanger is connected to the external low-temperature heat source 21, and the heat source side outlet of the supplementary heat exchanger is connected to the external cold source 22. The external low-temperature heat source 21 can be a low-grade heat source collected during the expansion and energy release period, or a low-grade compressed waste heat during the energy storage stage, or other low-grade waste heat from the compressed air energy storage power station, such as waste heat from the instrument air compressor station, lubricating oil waste heat, etc.

[0035] The main pipeline between the water intake pipe 3 and the spray header pipe 12 is connected in series with a bypass shut-off valve 9 and a bypass pipeline 10. The bypass shut-off valve 9 is connected in parallel with the spray water inlet shut-off valve 14 and the spray water outlet shut-off valve 15. Controlling the bypass shut-off valve enables flexible coupling between the thermal energy changes of the gas storage tank and the heat replenishment system, thereby utilizing waste heat resources and improving overall energy efficiency.

[0036] The temperature measuring device 19 is installed on the inner wall of the gas storage tank 17 to monitor the temperature of compressed air and spray water 2 inside the gas storage tank 17.

[0037] like Figure 2 As shown, the phase change thermal energy storage module 8 is a multi-row, circumferentially arranged support frame. The support frame is immersed in the liquid in the spray pool 1. The phase change thermal energy storage module 8 absorbs heat when storing gas in the gas storage tank 17 and releases heat when releasing gas. The phase change temperature of the phase change thermal energy storage material in the phase change thermal energy storage module 8 is close to the ambient temperature of the underground gas storage tank 17, thereby reducing heat transfer between the gas storage tank 17 and its surrounding environment. The structural shape of the phase change thermal energy storage module 8 can be selected as a parallel plate structure, a cylindrical sleeve structure, a solid cylindrical structure, or a spherical particle structure, etc.

[0038] The phase change thermal energy storage module 8 is immersed in the spray water tank 1. It absorbs or releases heat from the spray water 2 through the high latent heat characteristics of the phase change thermal energy storage material. The spray water 2 is atomized and sprayed to ensure that the temperature of the compressed air inside the gas storage tank 17 remains within a reasonable range, extending the service life of the sealing material of the gas storage tank 17 and ensuring the safe operation of the gas storage tank 17. Simultaneously, the thermal expansion force of the compressed air is reduced accordingly, and the resistance overcome by the compression system is also lower. To compress the same mass of air to the target pressure, less work is required from the compression system, reducing compression energy consumption. Therefore, under the same power generation conditions, the energy storage charging amount is reduced, the energy consumption of the compression system is lowered, and the compressed air energy storage density, system recycling rate, and electroconversion efficiency are improved.

[0039] The gas storage 17 phase change thermal storage temperature system has multiple temperature measuring devices 19 installed around the perimeter and center of each radial section of the gas storage 17. The temperature measuring devices 19 are used to monitor the gas-side space temperature and the spray water-side space temperature at different locations within the gas storage 17, and to measure the temperature of the phase change thermal storage module 8 by measuring the water-side space temperature.

[0040] The phase change thermal storage temperature control system of the gas storage 17 also includes a control module connected to the temperature measuring device 19. The control module receives temperature data and, based on a preset temperature threshold, precisely adjusts the flow rate and operating parameters of the spray water 2 through the main circuit shut-off valve or starts the supplementary heat exchanger to introduce external waste heat in order to optimize energy efficiency.

[0041] Working principle:

[0042] Temperature control during energy storage

[0043] Step 1: Close the main shut-off valve 4, check valve 6, bypass shut-off valve 9, spray water inlet shut-off valve 14, and spray water outlet shut-off valve 15. During the constant volume injection process of the gas storage tank 17, the temperature of the compressed air inside it gradually increases. When the temperature rises to the set temperature threshold (e.g., 60℃), the spray water pump 2 is triggered to start, and at the same time the main shut-off valve 4, check valve 6, and bypass shut-off valve 9 are opened.

[0044] Step 2: Spray water 2 is drawn from spray water pool 1 through water suction pipe 3 to spray main pipe 12, and atomized into scattered water mist through nozzle 13. The scattered water mist is sprayed into the upper space of gas storage 17 to absorb the heat of compressed air and reduce the temperature of compressed air.

[0045] Step 3: The high-temperature spray water 2 falls back into the spray water tank 1, and the heat is transferred to the phase change thermal storage module 8. The material undergoes a phase change and absorbs heat, and the temperature of the spray water 2 drops to the phase change temperature of the phase change thermal storage module 8 (e.g., 45°C). This cycle repeats. Because the phase change thermal storage material has a large phase change potential near the phase change temperature, the temperature of the entire gas storage chamber is maintained at the phase change temperature of the phase change thermal storage material (e.g., 45°C).

[0046] Step 4: Temperature measuring device 19 monitors the temperature of compressed air and spray water 2 inside gas storage tank 17 in real time.

[0047] If the local temperature is abnormal, the control module adjusts the operating parameters of the spray water 2 flow rate through the main shut-off valve 4 or starts the heat exchanger to introduce external waste heat to optimize energy efficiency based on the preset temperature threshold.

[0048] Temperature control for energy storage to end and energy release to begin.

[0049] Step 1: Close the main shut-off valve 4, check valve 6, bypass shut-off valve 9, spray water inlet shut-off valve 14, and spray water outlet shut-off valve 15. During the constant volume release process of the gas storage tank 17, the temperature of the compressed air inside it gradually decreases until it drops to the set temperature threshold (e.g., 5℃), triggering the start of spray water pump 2. At the same time, the main shut-off valve 4, check valve 6, and bypass shut-off valve 9 are opened.

[0050] Step 2: Spray water 2 is drawn from spray water pool 1 through water suction pipe 3 to spray main pipe 12, and atomized into scattered water mist through nozzle 13. The scattered water mist is sprayed into the upper space of gas storage tank 17 to replenish the heat of compressed air and raise the temperature of compressed air.

[0051] Step 3: The low-temperature spray water 2 falls back into the spray water tank 1, the phase change thermal storage module 8 releases heat, the material undergoes a phase change and releases heat, and the spray water 2 heats up to the phase change temperature of the phase change thermal storage module 8 (e.g., 45℃); this cycle repeats. Because the phase change thermal storage material has a large phase change potential near the phase change temperature, the temperature of the entire gas storage chamber is maintained at the phase change temperature of the phase change thermal storage material (e.g., 45℃).

[0052] Step 4: Temperature measuring device 19 monitors the temperature of compressed air and spray water 2 inside gas storage tank 17 in real time.

[0053] If the local temperature is abnormal, the control module adjusts the operating parameters of the spray water 2 flow rate through the main shut-off valve 4 or starts the heat exchanger to introduce external waste heat to optimize energy efficiency based on the preset temperature threshold.

[0054] Temperature control for energy release after long-term static storage ends.

[0055] Step 1: When the air temperature inside the gas storage tank 17 drops to the set temperature threshold (e.g., 5℃), the temperature of the spray water 2 and the phase change thermal storage module 8 also drops to the set temperature threshold (e.g., 5℃), triggering the start of the spray water pump 5. At the same time, the main shut-off valve 4, check valve 6, spray water inlet shut-off valve 14, and spray water outlet shut-off valve 15 are opened, the bypass shut-off valve 9 is closed, and the heat exchanger 20 is started to introduce external waste heat to supplement the heat.

[0056] Step 2: Spray water 2 is drawn from spray water pool 1 through water suction pipe 3 to spray main pipe 12, and atomized into scattered water mist through nozzle 13. The scattered water mist is sprayed into the upper space of gas storage tank 17 to replenish the heat of compressed air and raise the temperature of compressed air.

[0057] Step 3: Temperature measuring device 19 monitors the temperature of compressed air in gas storage tank 17 in real time, and adjusts the flow rate of spray water 2 to ensure that the temperature of compressed air in gas storage tank 17 does not fall below the set temperature threshold (e.g., 5°C).

[0058] Prolonged static storage causes heat to continuously diffuse from the gas storage tank 17 to the surrounding rock outside, resulting in a decrease in the temperature of the phase change thermal energy storage module 8. Consequently, the phase change thermal energy storage module 8 lacks excess heat to provide to the compressed air inside the gas storage tank. This leads to excessively low air temperature inside the gas storage tank during the energy release process. When the temperature drops below 0°C, the water inside the gas storage tank freezes, damaging the sealing layer structure and affecting the safe operation of the system. The supplementary heat exchange module 20 ensures that the gas storage tank 17 can still be controlled and supplemented with heat after prolonged static storage, ensuring a balance between heat supply and demand in the energy storage and release cycle, and improving the stability and continuity of system operation.

[0059] 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 present invention. In this specification, the 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.

[0060] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model 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 this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A phase change thermal energy storage temperature control system for a gas storage tank, comprising a gas storage tank (17) for storing compressed air, characterized in that: The gas storage tank (17) includes a spray water circulation module (7) for absorbing and releasing the heat of compressed air, a heat exchange module (20) for replenishing the heat of compressed air, and a temperature measuring device (19). The spray water circulation module (7) includes a spray main pipe (12) installed on the top of the gas storage tank (17) and a spray water pool (1) at the bottom. The spray water pool (1) is filled with water suction pipes (3). A phase change thermal storage module (8) is laid on the top surface of the water suction pipes (3). The water suction pipes (3) are connected to the main shut-off valve (4), spray water pump (5), check valve (6) and spray main pipe (12) in sequence through the main pipeline. The heat exchange module (20) is connected to the spray water circulation module (7) at both ends; The temperature measuring device (19) is installed on the inner wall of the gas storage tank (17) to monitor the temperature of compressed air and spray water (2) inside the gas storage tank (17).

2. The phase change thermal storage temperature control system for gas storage tank according to claim 1, characterized in that: The heat exchange module (20) includes a heat exchanger (16) and spray water inlet shut-off valve (14) and spray water outlet shut-off valve (15) at both ends. The spray water inlet shut-off valve (14) is connected to the main shut-off valve (4) through the main pipeline (11). The spray water outlet shut-off valve (15) is connected to the spray header pipe (12) through the main pipeline (11). The heat exchanger (16) is also connected to an external low-temperature heat source (21) and an external cold source (22) at both ends.

3. The phase change thermal storage temperature control system for gas storage tank according to claim 2, characterized in that: The main pipeline (11) between the water suction pipe (3) and the spray header pipe (12) is connected in series with a bypass shut-off valve (9) and a bypass pipeline (10). The bypass shut-off valve (9) is connected in parallel with the spray water inlet shut-off valve (14) and the spray water outlet shut-off valve (15).

4. The phase change thermal storage temperature control system for gas storage tanks according to claim 1, characterized in that: The phase change thermal storage module (8) is a multi-row ring-shaped support frame and is immersed in the liquid of the spray pool (1). The phase change thermal storage module (8) absorbs heat when storing gas in the gas storage tank (17) and releases heat when releasing gas.

5. The phase change thermal storage temperature control system for gas storage tank according to any one of claims 1-4, characterized in that: Multiple temperature measuring devices (19) are provided around and at the center of each radial section of the gas storage tank (17). The temperature measuring devices (19) are used to monitor the gas-side space temperature and the spray water (2)-side space temperature at different locations in the gas storage tank (17), and to measure the temperature of the phase change thermal energy storage module (8) by measuring the water space temperature.

6. The phase change thermal storage temperature control system for gas storage tank according to claim 5, characterized in that: The spray header (12) has multiple downward-radiating nozzles (13) horizontally arranged, and the nozzles (13) spray water mist to absorb and release the heat of compressed air in the gas storage tank (17).

7. The phase change thermal storage temperature control system for gas storage tanks according to claim 6, characterized in that: The diameter of the water suction pipe (3) gradually increases from both ends to the middle. The diameter of the water suction pipe (3) gradually increases from both ends to the middle. Multiple water suction branches are evenly distributed on the outer wall of each water suction pipe (3).

8. The phase change thermal storage temperature control system for gas storage tank according to claim 1, characterized in that: It also includes a control module, which is connected to the temperature measuring device (19) to receive temperature data. The control module adjusts the flow rate of the spray water (2) or starts the heat exchanger to introduce external waste heat according to the preset temperature threshold through the main shut-off valve.

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