Gas distribution system of artificial chamber and operation method

Abstract

The invention provides a gas distribution system of an artificial chamber, which comprises a gas inlet and outlet pipe, one end of which is connected with a gas compression device and a gas expansion device, the other end of which is arranged in the artificial chamber, and the gas inlet and outlet pipe in the artificial chamber is provided with a plurality of mounting positions; the gas distribution pipe is mounted at the mounting position and is internally provided with a plurality of flow guide pipes; wherein the air inlet and outlet pipes, the air distribution pipes and the flow guide pipes are communicated to form an air distribution channel, the airflow direction extension lines of the flow guide pipes and the centers of the air distribution pipes are staggered, and the airflow direction extension lines of the multiple flow guide pipes intersect at the center of the artificial chamber to form a polygon. According to the gas distribution system, when gas enters or leaves, a cyclone is formed in the center of the chamber, a local high-temperature or low-temperature area is controlled to be in the center of the chamber and away from the wall face of the chamber, and thermal expansion or cold contraction of a sealing layer of the chamber is relieved under the condition that the gas storage or deflation efficiency is not reduced. The invention further provides an operation method of the gas distribution system of the artificial chamber, and local high temperature or low temperature of the wall face of the chamber can be further prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and in particular to a gas distribution system and an operation method of an artificial chamber. Background Art

[0002] Compressed air energy storage has good development prospects and market potential as a storage method that can achieve low-cost peak shaving and valley filling and balance power load. The basic principle of compressed air energy storage is to use a compressor to compress air when there is excess electricity, convert the electrical energy into the potential energy of air and store it; when electricity is needed, the potential energy of air is converted into electrical energy through a turbine and transmitted to the power grid. The gas storage reservoir is an important equipment for storing high-pressure air in the compressed air energy storage system, mainly artificial chambers and abandoned salt caverns. Among them, artificial chambers do not rely on salt cavern resources and do not have brine corrosion, which has great advantages over abandoned salt caverns.

[0003] When using an artificial chamber, in order to reduce the volume of the chamber and reduce the construction cost, the gas storage pressure of the artificial chamber is generally high, and the pressure changes in the gas storage and degassing conditions are more drastic. Therefore, the temperature changes of the artificial chamber during the gas storage and degassing process are also more drastic. Taking the inflation condition as an example, when the high-pressure gas enters the chamber through the gas channel, the gas is compressed and the density increases, the temperature rises significantly, and the farther away from the gas channel, the more intense the compression. Therefore, the temperature of the artificial chamber fluctuates greatly in a storage cycle and presents an uneven distribution. According to simulation calculations, during the gas storage process, the pressure rises from 12MPa to 18MPa, the average temperature of the chamber rises from 40℃ to about 72℃, the local temperature is close to 80℃, and the temperature distribution is extremely uneven, the farther away from the gas inlet, the higher the temperature. The huge temperature rise causes a large thermal expansion of the sealing layer on the chamber wall, and the local high temperature on the chamber wall causes uneven distribution of thermal stress. According to theoretical analysis, there is also a huge temperature drop during the deflation process, which causes a large shrinkage of the sealing layer on the chamber wall. At the same time, the local low temperature on the chamber wall also makes the thermal stress distribution uneven, and the average temperature of the chamber decreases. During an energy storage cycle, the alternating hot and cold conditions on the chamber wall and the local stress concentration make the chamber lining and sealing layer more prone to cracks, increase the risk of gas leakage, reduce the gas storage capacity of the artificial chamber, shorten its service life, increase the operation and maintenance costs, and may even affect the structural stability of the artificial chamber.

[0004] At present, in order to reduce the wall temperature during the inflation process or increase the wall temperature during the deflation process, the method of reducing the intake and exhaust flow rate and slowing down the intake and exhaust speed is generally adopted in engineering. Although this method is effective, it reduces the gas storage and deflation efficiency of the artificial chamber. Summary of the invention

[0005] In response to the above problems, the present invention provides an air distribution system and operation method for an artificial chamber, which can control the high-temperature area during the intake process and the low-temperature area during the exhaust process in the center of the chamber, thereby reducing the impact of local temperature anomalies caused by intake or exhaust on the wall of the artificial chamber.

[0006] The present invention provides a gas distribution system for an artificial chamber, comprising: an inlet and outlet pipe, one end of which is respectively connected to a gas compression device and a gas expansion device, and the other end is arranged in the artificial chamber, and the inlet and outlet pipe located in the artificial chamber is evenly provided with a plurality of installation positions;

[0007] The air distribution pipe is installed in the installation position accordingly, and a plurality of guide pipes are arranged inside;

[0008] Among them, the air inlet and exhaust pipes, the air distribution pipe and the guide pipe are interconnected to form an air distribution channel, the air flow direction extension line of the guide pipe is staggered with the center of the air distribution pipe, and the air flow direction extension lines of multiple guide pipes intersect at the center of the artificial chamber to form a polygon.

[0009] According to the above technical scheme, through multiple inclined guide pipes, when the gas enters or leaves the chamber, a high-temperature or low-temperature cyclone can be formed in the center of the chamber, thereby controlling the local high-temperature or low-temperature area in the center of the chamber, away from the chamber wall, thereby alleviating the thermal expansion or contraction of the chamber sealing layer without reducing the gas storage or release efficiency of the artificial chamber, reducing the huge thermal stress caused by uneven temperature distribution, enhancing the stability of the lining and sealing layer of the artificial chamber, improving the safety and stability of the artificial chamber, and reducing the operation and maintenance cost of the artificial chamber.

[0010] Optionally, the shape of the air distribution pipe is the same as the longitudinal section of the artificial chamber, and the peripheral wall of the air distribution pipe is in close contact with the inner wall of the artificial chamber.

[0011] According to the above technical scheme, it can be ensured that a cyclone can be formed at the center of the chamber when air is introduced and exhausted through the air distribution pipe, so that the local high temperature or low temperature area is away from the chamber wall.

[0012] Optionally, the number of the flow guide pipes provided in each air distribution pipe is at least 3, and the flow guide pipes are evenly distributed in the air distribution pipe.

[0013] According to the above technical scheme, the airflow distribution can be made more uniform during the process of gas input or discharge into the chamber. At the same time, the extension lines of the airflow directions of more than three evenly distributed guide tubes can intersect at the center of the chamber and form a regular polygon, further ensuring that a high-temperature or low-temperature cyclone can be stably formed at the center of the chamber and away from the chamber wall during the air intake and exhaust process.

[0014] Optionally, the length of the guide pipe is 1 / 6-2 / 5 of the inner diameter of the artificial chamber, and the angle between the guide pipe and the center of the gas distribution pipe is 0°-60°.

[0015] According to the above technical scheme, by reasonably designing the length of the guide pipe and the angle between the guide pipe and the center of the gas distribution pipe, it is possible to ensure that the gas forms a stable flow field when entering or leaving the chamber, thereby forming a stable cyclone in the center of the chamber.

[0016] Optionally, the length of the flow guide tube is 1 / 5-1 / 3 of the inner diameter of the artificial chamber.

[0017] According to the above technical solution, the preferred length of the guide tube can further ensure that a stable cyclone can be formed at the center of the chamber during the intake and exhaust processes.

[0018] Optionally, the gas compression device is a compressor and the gas expansion device is a turbine.

[0019] Optionally, it also includes: a flow control device, including an intake total flow valve arranged between the intake and exhaust pipes and the gas compression device, an exhaust total flow valve arranged between the intake and exhaust pipes and the gas expansion device, and an air distribution pipe flow valve arranged between the intake and exhaust pipes and the air distribution pipe.

[0020] According to the above technical solution, the gas medium flow rate entering or leaving the chamber in each gas distribution pipe can be accurately adjusted while controlling the total intake and exhaust flow rate, so that the average temperature and local temperature can be adjusted through flow regulation.

[0021] Optionally, it also includes: a temperature control device, including a temperature sensor and a controller, the controller is communicatively connected with the flow control device, the temperature sensors are evenly arranged and installed on the inner wall of the artificial chamber, the local temperature and the average temperature in the artificial chamber are monitored, the controller adjusts the average temperature by controlling the total air intake flow valve or the total exhaust flow valve to perform overall flow control according to the average temperature, and the controller adjusts the local temperature by controlling the air distribution pipe flow valve to perform local flow control according to the local temperature.

[0022] According to the above technical solution, by monitoring the temperature through the temperature sensor and correspondingly controlling the flow control device to control the flow, the temperature distribution in the chamber can be adjusted, thereby more effectively preventing local high or low temperatures from occurring on the chamber wall.

[0023] The present invention also provides an operating method for the above-mentioned gas distribution system of the artificial chamber, comprising the following steps:

[0024] Intake steps: the intake total flow valve is opened, and the exhaust total flow valve is closed at the same time. The gas compression device compresses the gas medium, and the gas medium is input into the intake and exhaust pipes, and then transported to the interior of the artificial chamber through the air distribution pipes through the guide pipes;

[0025] Intake flow control steps: During the intake process, the temperature sensor monitors the average temperature and local temperature in the artificial cavern, and the controller adjusts the total intake flow valve and the gas distribution pipe flow valve accordingly to adjust the temperature. When the average temperature approaches the warning temperature, or the local temperature approaches the local warning temperature, and the controller cannot control the temperature by adjusting the total intake flow valve and the gas distribution pipe flow valve, the controller will stop the gas compression device and close the total intake flow valve to terminate the intake;

[0026] Exhaust steps: the total intake flow valve is closed, and the total exhaust flow valve is opened at the same time, the gas medium leaves the artificial chamber, passes through the guide pipe in the gas distribution pipe, enters the intake and exhaust pipes from the gas distribution pipe, and then goes to the gas expansion device for expansion and work;

[0027] Exhaust flow control steps: During the exhaust process, the temperature sensor monitors the average temperature and local temperature in the artificial cavern, and the controller adjusts the exhaust total flow valve and the gas distribution pipe flow valve accordingly to adjust the temperature. When the average temperature is close to the warning temperature, or the local temperature is close to the local warning temperature, and the controller cannot control the temperature by adjusting the exhaust total flow valve and the gas distribution pipe flow valve, the controller will stop the gas expansion device and close the exhaust total flow valve to terminate the exhaust.

[0028] According to the above technical scheme, a high-temperature or low-temperature cyclone is formed in the center of the chamber through multiple guide tubes in the gas distribution pipe, thereby controlling the high-temperature or low-temperature area in the center of the chamber away from the wall. At the same time, the temperature is further monitored by a temperature control device and the flow control device is used to control the flow of the gas medium entering or leaving the chamber accordingly, thereby further adjusting the temperature distribution in the chamber, and further more effectively preventing local high or low temperatures from occurring on the chamber wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A system block diagram of a gas distribution system for an artificial chamber in an embodiment of the present invention;

[0030] Figure 2 A schematic structural diagram of a gas distribution system for an artificial chamber in an embodiment of the present invention;

[0031] Figure 3 A schematic cross-sectional view of an artificial chamber in an embodiment of the present invention in which the longitudinal section is circular and the air distribution pipe is provided with four air guide pipes;

[0032] Figure 4 A schematic cross-sectional view of an artificial chamber in an embodiment of the present invention in which the longitudinal section is circular and the air distribution pipe is provided with five air guide pipes;

[0033] Figure 5 A schematic cross-sectional view of an embodiment of the present invention in which the longitudinal section of the artificial chamber is in the shape of a doorway and the air distribution pipe is provided with four air guide pipes.

[0034] Figure numerals: gas distribution system 100 of artificial chamber, gas compression device 10, compressor 11, gas expansion device 20, turbine 21, gas distribution device 30, inlet and outlet pipes 31, gas distribution pipe 32, flow guide pipe 321, artificial chamber 40, temperature control device 50, temperature sensor 51, flow control device 60, total air intake flow valve 61, total exhaust flow valve 62, gas distribution pipe flow valve 63. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] refer to Figure 1 The gas distribution system 100 of the artificial chamber of this embodiment includes a gas compression device 10, a gas expansion device 20, a gas distribution device 30, an artificial chamber 40, a temperature control device 50, and a flow control device 60.

[0037] The gas compression device 10 is used to compress the gas medium, improve the quality of the gas medium that can be stored in the artificial chamber 40, and enhance the energy storage capacity of the artificial chamber.

[0038] The gas expansion device 20 is used to expand the gas medium to do work and release the energy stored in the artificial chamber 40 .

[0039] Specifically, refer to Figure 2 , the gas compression device 10 is a compressor 11, and the gas expansion device 20 is a turbine 21. In this embodiment, the gas compression device 10 includes a plurality of compressors 11 connected in series, and the gas expansion device 20 includes a plurality of turbines 21 connected in series. In some embodiments, the gas compression device 10 and the gas expansion device 20 can be replaced by one or more other devices or device combinations capable of gas compression / expansion, which are not limited here.

[0040] The gas distribution device 30 connects the gas compression device 10, the gas expansion device 20 and the artificial chamber 40, and controls the flow field through the gas distribution device 30 during the process of compressed gas entering or leaving the chamber, and controls the high-temperature area or the low-temperature area in the center of the chamber away from the chamber wall, thereby reducing the temperature fluctuation and uneven temperature distribution of the wall during the filling and deflation of the artificial chamber 40 and the impact on the structure of the artificial chamber 40.

[0041] Specifically, refer to Figure 2 and Figure 3 The air distribution device 30 includes an air inlet and outlet pipe 31 , an air distribution pipe 32 and a flow guide pipe 321 .

[0042] One end of the inlet and outlet pipe 31 is connected to the gas compression device 10 and the gas expansion device 20 respectively, and the other end is arranged in the artificial chamber 40. In this embodiment, the other end of the inlet and outlet pipe 31 penetrates into the artificial chamber 40 and extends along the inner wall of the chamber body to the inside of the chamber until the other wall of the chamber.

[0043] The air inlet and outlet pipes 31 in the artificial chamber 40 are evenly provided with a plurality of installation positions, and the air distribution pipes 32 are correspondingly installed in the installation positions. Meanwhile, a plurality of flow guide pipes 321 are provided inside the air distribution pipes 32.

[0044] The air inlet and exhaust pipes 31, the air distribution pipe 32 and the guide pipe 321 are interconnected to form an air distribution channel, connecting the gas compression device 10 and the gas expansion device 20 with the artificial chamber 40. The air flow direction extension line of the guide pipe 321 is staggered with the center of the air distribution pipe, that is, the guide pipes 321 are all arranged obliquely relative to the inner wall surface of the air distribution pipe 32, and the air flow direction extension lines of multiple guide pipes 321 intersect at the center position of the artificial chamber 40 to form a regular polygon.

[0045] The inlet and exhaust pipes 31, the air distribution pipes 32 and the guide pipes 321 can control the flow field during the process of compressed gas entering or leaving the chamber. A central cyclone is formed by multiple inclined guide pipes 321 to control the high-temperature area during the intake process or the low-temperature area during the exhaust process in the center of the chamber, away from the chamber wall.

[0046] Specifically, refer to Figure 3 The shape of the air distribution pipe 32 is the same as the longitudinal section of the artificial chamber 40, and it fits with the wall of the chamber. There are four guide pipes 321 on the air distribution pipe 32 to guide the air flow into or out of the chamber, and they are evenly distributed on the air distribution pipe 32. The length of the four guide pipes 321 is 1 / 4 of the inner diameter of the chamber. The guide pipes 321 are arranged obliquely, and the angle α with the center line of the air distribution pipe 32 is 30°. The angle between adjacent guide pipes 321 is 90°. The extension lines of the air flow directions of each guide pipe intersect at the center of the chamber and form a square.

[0047] Under the above structure, due to the inclined arrangement and uniform distribution of the guide tube 321, the gas will flow along the direction of the guide tube 321 when entering or leaving the chamber, and form a high-temperature or low-temperature cyclone in the center of the chamber, thereby controlling the local high-temperature or low-temperature area in the center of the chamber, away from the chamber wall.

[0048] During the air intake process, the gas enters the air distribution pipe 32 and then enters the chamber from each guide pipe 321, forming a high-temperature cyclone in the central area of ​​the air distribution pipe 32, which can control the local high-temperature area in the center of the chamber, away from the chamber wall, and prevent thermal expansion caused by the local high temperature of the chamber wall.

[0049] In this embodiment, in the simulated air intake process, the temperature at the center of the chamber is about 4°C higher than that at the chamber wall, indicating that the above-mentioned air distribution device 30 can form a cyclone in the center of the chamber, so that the high-temperature area is away from the chamber wall, thereby reducing the thermal stress caused by uneven temperature distribution and reducing damage to the chamber lining and sealing layer.

[0050] During the exhaust process, the gas enters the gas distribution pipe 32 from each guide pipe 321 and leaves the chamber, forming a low-temperature cyclone in the central area of ​​the gas distribution pipe 32, which can control the local low-temperature area in the center of the chamber, away from the chamber wall, and prevent the local low temperature of the chamber wall from causing cold shrinkage.

[0051] refer to Figure 4 In a more preferred embodiment, there are five guide pipes 321 on the gas distribution pipe 32, and the guide pipes 321 are evenly distributed on the gas distribution pipe 32. The length of the guide pipe 321 is 1 / 4 of the inner diameter of the chamber, and the guide pipe 321 is arranged obliquely, and the angle α between the center line of the gas distribution pipe 32 is 15°, and the angle between adjacent guide pipes 321 is 72°. The extension lines of the airflow directions of the guide pipes intersect at the center of the chamber and form a regular pentagon.

[0052] Specifically, when the total gas mass flow rate is the same, the five flow guides can guide the gas flow more evenly, forming a more stable and uniform central cyclone, thereby better controlling the temperature distribution. Figure 4 The gas flow field formed by the gas distribution pipe structure shown will be better than the control of high temperature or low temperature areas. Figure 3 The air pipe structure shown.

[0053] refer to Figure 5 When the longitudinal section of the chamber is in the shape of a doorway, the shape of the air distribution pipe 32 remains the same as the longitudinal section of the chamber and fits with the wall of the chamber. There are four guide pipes 321 on the air distribution pipe 32 to guide the airflow into or out of the chamber. The four guide pipes 321 are evenly distributed on the air distribution pipe 32. The guide pipes 321 are arranged obliquely, and the angle α with the center line of the air distribution pipe is 30°. The extension lines of the airflow directions of the guide pipes intersect at the center of the chamber and form a square.

[0054] Specifically, by keeping the shape of the air distribution pipe 32 the same as the longitudinal section of the chamber and fitting it into the wall of the chamber, even when used in chambers of different shapes, the inclined and evenly distributed flow guide pipes 321 can form a cyclone in the central area of ​​the air distribution pipe 32, so that the formed high-temperature or low-temperature cyclone can be located at the center of the chamber at the same time, away from the wall of the chamber.

[0055] Furthermore, the number of guide pipes 321 on the air distribution pipe 32 can be 3, 4, 5 or more, which can be determined according to the specific conditions of air intake and exhaust of the artificial chamber; the length of the guide pipe 321 is 1 / 6-2 / 5 of the inner diameter of the chamber, preferably 1 / 5-1 / 3, and the guide pipe 321 is inclined relative to the inner wall of the air distribution pipe 32, with an angle of 0-60°, which can be adjusted according to actual conditions to ensure that the gas can fully diffuse and form a stable flow field; the extended lines of the air flow directions of each guide pipe 321 intersect at the center of the chamber and form a regular polygon, so that during the air intake and exhaust process, a stable high-temperature or low-temperature cyclone can be formed at the center of the chamber, away from the chamber wall.

[0056] The temperature control device 50 is used to monitor the local temperature and average temperature of each area in the artificial chamber 40, and adjust the flow control device 60 according to the monitoring situation.

[0057] The flow control device 60 is used to adjust the total flow of the gas medium entering or leaving the artificial chamber 40 and the flow distribution of the gas distribution device 30, so as to adjust the local temperature and average temperature of the artificial chamber 40.

[0058] Specifically, refer to Figure 2 The flow control device 60 includes an intake total flow valve 61 disposed between the intake and exhaust pipes 31 and the gas compression device 10, an exhaust total flow valve 62 disposed between the intake and exhaust pipes 31 and the gas expansion device 20, and an air distribution pipe flow valve 63 disposed between the intake and exhaust pipes 31 and the air distribution pipe 32. The intake total flow valve 61, the exhaust total flow valve 62, and the air distribution pipe flow valve 63 can accurately adjust the gas medium flow rate of each air distribution pipe 32 entering or leaving the chamber while controlling the total intake and exhaust flow rate, thereby effectively regulating the local temperature and the average temperature.

[0059] The temperature control device 50 includes a temperature sensor 51 and a controller (not shown in the figure), and the controller is in communication connection with the flow control device 60 .

[0060] The temperature sensors 51 are evenly arranged and installed on the inner wall of the artificial chamber 40 to monitor the local temperature and average temperature in the artificial chamber 40. The controller adjusts the average temperature by controlling the total intake flow valve 61 or the total exhaust flow valve 62 to control the overall flow rate according to the average temperature. The controller adjusts the local temperature by controlling the gas distribution pipe flow valve 63 to control the local flow rate according to the local temperature. The temperature control device 50 can monitor the temperature in the chamber and adjust the flow rate of the gas medium entering or leaving the chamber accordingly, thereby reducing the overall temperature fluctuation of the chamber and further preventing local temperature abnormalities.

[0061] This embodiment also provides an operation method of the gas distribution system 100 of the artificial chamber, comprising the following steps:

[0062] Intake step: Under the intake condition, the total intake flow valve 61 is opened, and the total exhaust flow valve 62 is closed. The gas compression device 10 compresses the gas medium, and the gas medium is input into the exhaust pipe 31, and then transported to the interior of the artificial chamber 40 by each gas distribution pipe 32 through the guide pipe 321.

[0063] Specifically, the gas medium enters the chamber through multiple flow guide tubes 321 and forms a reasonable flow field in the chamber. By forming a high-temperature cyclone at the center of the chamber, the high-temperature area is controlled in the center of the chamber away from the wall, preventing thermal expansion caused by local high temperature of the chamber wall.

[0064] Intake flow control steps: During the intake process, the gas medium inside the chamber is compressed, pressurized and heated. The temperature sensor 51 monitors the average temperature and local temperature in the artificial chamber 40. When the average temperature rises, the controller adjusts the total intake flow valve 61 to adjust the total intake flow; when the temperature sensor 51 at the corresponding position detects that the local temperature of the local area is too high, the controller adjusts the gas distribution pipe flow valve 63 of the gas distribution pipe 32 that affects the area to adjust the local flow entering the chamber. When the average temperature of the chamber approaches the preset warning temperature, or the local temperature approaches the preset local warning temperature, and the controller cannot control the temperature by adjusting the total intake flow valve 61 and the gas distribution pipe flow valve 63, the controller will stop the gas compression device 10 and close the total intake flow valve 61 to terminate the intake.

[0065] Specifically, in this embodiment, the gas medium is input through multiple flow guide pipes 321 and a high-temperature cyclone is formed at the center of the chamber, thereby controlling the high-temperature area in the center of the chamber away from the wall surface to prevent thermal expansion caused by local high temperature on the chamber wall surface. In addition, the temperature is further monitored by the temperature control device 50 and the total air intake flow valve 61 and the air distribution pipe flow valve 63 are controlled accordingly to change the flow rate of the gas medium entering the chamber, thereby further reducing the temperature rise of the gas medium in the chamber, thereby more effectively preventing local high temperature on the chamber wall surface.

[0066] Exhaust step: Under the exhaust condition, the total intake flow valve 61 is closed, and the total exhaust flow valve 62 is opened at the same time, the gas medium leaves the artificial chamber 40, and the gas medium passes through the guide pipe 321 in the gas distribution pipe 32, enters the intake and exhaust pipe 31 from the gas distribution pipe 32, and then goes to the gas expansion device 20 to expand and perform work.

[0067] Specifically, the gas medium enters the gas distribution pipe 32 through multiple flow guide pipes 321 and leaves the chamber, forming a reasonable flow field in the chamber and a low-temperature cyclone in the center of the chamber, thereby controlling the low-temperature area in the center of the chamber away from the wall, preventing local low temperature on the chamber wall from causing shrinkage.

[0068] Exhaust flow control steps: During the exhaust process, the gas medium inside the chamber expands, reduces pressure and temperature, and the temperature sensor 51 monitors the average temperature and local temperature in the artificial chamber 40. When the average temperature decreases, the controller adjusts the exhaust total flow valve 62 to adjust the total exhaust flow; when the temperature sensor 51 at the corresponding position monitors that the local temperature of the local area is low, the controller adjusts the gas distribution pipe flow valve 63 of the gas distribution pipe 32 that affects the area to adjust the local flow out of the chamber. When the average temperature of the chamber approaches the preset warning temperature, or the local temperature approaches the preset local warning temperature, and the controller cannot control the temperature by adjusting the exhaust total flow valve 62 and the gas distribution pipe flow valve 63, the controller will stop the gas expansion device 20 and close the exhaust total flow valve 62 to terminate the exhaust.

[0069] Specifically, in the present embodiment, the gas medium is discharged through a plurality of flow guide pipes 321 and a low-temperature cyclone is formed at the center of the chamber, thereby controlling the low-temperature area at the center of the chamber away from the wall surface to prevent the local low temperature on the chamber wall surface from causing shrinkage. In addition, the temperature is further monitored by the temperature control device 50 and the exhaust total flow valve 62 and the gas distribution pipe flow valve 63 are controlled accordingly to change the flow rate of the gas medium leaving the chamber, thereby further reducing the temperature drop of the gas medium in the chamber, thereby more effectively preventing the local low temperature on the chamber wall surface.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air distribution system for an artificial chamber, characterized in that: include: An inlet and outlet pipe, one end of which is respectively connected to a gas compression device and a gas expansion device, and the other end is arranged in the artificial chamber, and the inlet and outlet pipe located in the artificial chamber is evenly provided with a plurality of installation positions; An air distribution pipe is installed in the installation position correspondingly, and is provided with a plurality of flow guide pipes inside; Among them, the air inlet and exhaust pipes, the air distribution pipe and the guide pipe are interconnected to form an air distribution channel, the air flow direction extension line of the guide pipe is staggered with the center of the air distribution pipe, and the air flow direction extension lines of multiple guide pipes intersect at the center of the artificial chamber to form a polygon.

2. The gas distribution system for an artificial chamber according to claim 1, characterized in that: The shape of the air distribution pipe is the same as the longitudinal section of the artificial chamber, and the peripheral wall of the air distribution pipe is in close contact with the inner wall of the artificial chamber.

3. The gas distribution system for an artificial chamber according to claim 1, characterized in that: The number of the flow guide pipes provided in each of the air distribution pipes is at least 3, and the flow guide pipes are evenly distributed in the air distribution pipes.

4. The gas distribution system for an artificial chamber according to claim 3, characterized in that: The length of the guide pipe is 1 / 6-2 / 5 of the inner diameter of the artificial chamber, and the angle between the guide pipe and the center of the gas distribution pipe is 0°-60°.

5. The gas distribution system for an artificial chamber according to claim 4, characterized in that: The length of the flow guide tube is 1 / 5-1 / 3 of the inner diameter of the artificial chamber.

6. The gas distribution system for an artificial chamber according to claim 1, characterized in that: The gas compression device is a compressor, and the gas expansion device is a turbine.

7. The gas distribution system for an artificial chamber according to claim 1, characterized in that: Also includes: The flow control device includes an intake total flow valve arranged between the intake and exhaust pipes and the gas compression device, an exhaust total flow valve arranged between the intake and exhaust pipes and the gas expansion device, and an air distribution pipe flow valve arranged between the intake and exhaust pipes and the air distribution pipe.

8. The gas distribution system for an artificial chamber according to claim 7, characterized in that: Also includes: The temperature control device includes a temperature sensor and a controller, wherein the controller is in communication connection with the flow control device. The temperature sensors are evenly arranged and installed on the inner wall surface of the artificial chamber to monitor the local temperature and the average temperature in the artificial chamber. The controller adjusts the average temperature by controlling the intake total flow valve or the exhaust total flow valve to perform overall flow control according to the average temperature. The controller adjusts the local temperature by controlling the gas distribution pipe flow valve to perform local flow control according to the local temperature.

9. An operating method for a gas distribution system of an artificial chamber as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Intake step: the intake total flow valve is opened, and the exhaust total flow valve is closed, the gas compression device compresses the gas medium, the gas medium is input into the intake and exhaust pipes, and then transported to the interior of the artificial chamber by each of the gas distribution pipes through the guide pipe; Intake flow control step: during the intake process, the temperature sensor monitors the average temperature and local temperature in the artificial cavern, and the controller correspondingly adjusts the intake total flow valve and the gas distribution pipe flow valve to adjust the temperature. When the average temperature approaches the warning temperature, or the local temperature approaches the local warning temperature, and the controller cannot control the temperature by adjusting the intake total flow valve and the gas distribution pipe flow valve, the controller will stop the gas compression device and close the intake total flow valve to terminate the intake; Exhaust step: the total intake flow valve is closed, and the total exhaust flow valve is opened, and the gas medium leaves the artificial chamber, passes through the guide pipe in the gas distribution pipe, enters the intake and exhaust pipes from the gas distribution pipe, and then goes to the gas expansion device to expand and perform work; Exhaust flow control step: During the exhaust process, the temperature sensor monitors the average temperature and local temperature in the artificial cavern, and the controller adjusts the exhaust total flow valve and the gas distribution pipe flow valve accordingly to adjust the temperature. When the average temperature is close to the warning temperature, or the local temperature is close to the local warning temperature, and the controller cannot control the temperature by adjusting the exhaust total flow valve and the gas distribution pipe flow valve, the controller will stop the gas expansion device and close the exhaust total flow valve to terminate the exhaust.

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