An enhanced geothermal system heat flow coupling simulation device and optimization design method

Abstract

The application discloses a kind of enhanced geothermal system heat flow coupling simulation device and optimization design method, it is related to geothermal energy technical field, including support frame, the side of the support frame is provided with sliding rail, the top end of the sliding rail is slidably installed with sliding support arm, the top end of the sliding support arm is installed with winding motor, the transmission end of the winding motor is connected with winding disc, the outside of the winding disc is wound with winding steel cable, one end of the winding steel cable is connected with fixed plate, the bottom of the fixed plate is welded with mounting ring plate, the inside of the embedded groove is driven screw, so that the sliding block on the outside of sliding rod can be adjusted to slide, when two rocks are accurately moved to the position where test needs to be carried out, the operator can stop moving the sliding block, at this time, the driving screw will play a limiting role to fix the two rocks, so as to ensure the accuracy of experimental data.

Description

Technical Field

[0001] This invention relates to the field of geothermal energy technology, specifically to an enhanced geothermal system heat flux coupling simulation device and optimization design method. Background Technology

[0002] The Enhanced Geothermal System Heat-Fluid Coupling Simulation Device is a highly complex and integrated scientific research platform. By precisely controlling and monitoring the multi-physics field processes in fractured rock masses under high temperature and high pressure, it can profoundly reveal the key mechanisms of EGS reservoirs during construction and operation, providing indispensable experimental evidence and theoretical support for EGS site assessment, parameter optimization and risk control.

[0003] However, existing simulation devices are difficult to accurately adjust the crack distance of rock strata, resulting in data that is difficult to support actual site assessment, increasing operational risks and reducing development efficiency. To avoid the above technical problems, it is necessary to provide an enhanced geothermal system heat flow coupling simulation device and optimization design method to overcome the defects in the existing technology. Summary of the Invention

[0004] This invention provides an enhanced geothermal system heat flow coupling simulation device and optimization design method, which can effectively solve the problem mentioned in the background art that existing simulation devices are difficult to accurately adjust the crack distance of rock strata, resulting in data that is difficult to support actual site assessment, increasing operational risks and reducing development efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an enhanced geothermal system heat flow coupling simulation device, comprising a support frame, wherein a fixing component is installed at the top of the support frame;

[0006] The stationary assembly includes a reaction vessel;

[0007] A reaction vessel is mounted on the top of the support frame, a sliding rail is provided on one side of the support frame, a sliding support arm is slidably mounted on the top of the sliding rail, a winding motor is mounted on the top of the sliding support arm, and a winding reel is connected to the transmission end of the winding motor.

[0008] A winding steel cable is wound on the outer side of the winding reel. One end of the winding steel cable is connected to a fixing plate. A mounting ring plate is welded to the bottom end of the fixing plate. An installation chamber is opened on the inner side of the mounting ring plate. A sliding rod is welded to the inner side of the installation chamber. A sliding block is slidably installed on the outer side of the sliding rod.

[0009] According to the above technical solution, a sliding groove is provided on the inner side of the sliding block. There are two sliding grooves, which are symmetrically provided on the inner side of the sliding block.

[0010] According to the above technical solution, the inner side of the mounting ring plate is provided with an embedding groove, the inner side of the embedding groove is embedded with a threaded tube, the inner side of the threaded tube is threadedly connected with a drive screw, and the inner middle position of the drive screw is provided with a drive thread groove.

[0011] The bottom end of the sliding block is welded with a fixing groove plate, the inner side of the fixing groove plate is provided with a fixing groove, the inner side of the fixing groove is engaged with a snap-fit ​​block, and the bottom end of the snap-fit ​​block is welded with a metal fixing band.

[0012] The inner side of the fixed groove plate is threaded with a fixing screw, and the outer front of the reaction vessel is provided with an observation window.

[0013] According to the above technical solution, two sliding blocks are provided, and the two sliding blocks are symmetrically slidably installed on the outer side of the sliding rod;

[0014] Two fixing groove plates are provided, and the two fixing groove plates are symmetrically welded to the bottom position of the sliding block.

[0015] According to the above technical solution, a connecting groove is provided on the inner side of the fixing plate at the position corresponding to the fixing screw, and the fixing screw passes through the connecting groove and connects to the fixing plate;

[0016] The drive screw is connected to the drive threaded groove, and the input end of the winding motor is electrically connected to the output end of the external power supply.

[0017] According to the above technical solution, a pressurization component is installed at the bottom of the reactor;

[0018] The booster assembly includes an air collection pipe;

[0019] The bottom of the reactor is connected to a gas collecting pipe, the bottom of the gas collecting pipe is connected to a gas outlet pipe, a booster pump is installed at the bottom of the reactor, the gas inlet of the booster pump is connected to a gas inlet end, the gas outlet of the booster pump is connected to a pressurizing pipe, the gas outlet of the pressurizing pipe is connected to a sealing pipe, and the gas outlet of the sealing pipe is connected to a transfer pipe.

[0020] A limit ring is welded to the inner side of the transfer pipe, and a limit spring is spot-welded to the top of the limit ring. A rubber sealing gasket is slidably installed on the inner side of the transfer pipe, and a venting groove is opened on the inner side of the limit ring. A recovery pipe is connected to the outer side of the transfer pipe, and a solenoid valve is sleeved on the outer side of the recovery pipe.

[0021] According to the above technical solution, the outer diameter of the rubber sealing gasket is equal to the inner diameter of the transfer tube, and the recovery tube is connected to the internal cavity of the transfer tube.

[0022] According to the above technical solution, the air outlet pipe is connected to the air inlet, and the input end of the booster pump is electrically connected to the output end of an external power supply.

[0023] According to the above technical solution, an optimization design method for an enhanced geothermal system heat flux coupling simulation device includes the following steps:

[0024] S1. Experimental preparation: Fix the reactor to the top of the support frame, drive the winding reel to rotate through the winding motor, drive the winding steel cable to pull the installation ring plate and sliding block, and complete the positioning and stable fixation of the experimental device.

[0025] S2. Adjustment of fixed components: By cooperating with the drive screw and the drive thread groove, the position of the sliding block on the sliding rod is adjusted to realize the simulation of force at different depths and angles. At the same time, the fixed screw is used to lock the snap-fit ​​block and the metal fixing band to stabilize the structure.

[0026] S3. Pressurization and Fluid Circulation: Start the booster pump to draw in the working medium through the air inlet. The medium is then pressurized and transmitted through the pressurization pipe, sealing pipe, and transfer pipe. The limit ring and limit spring work together to dynamically adjust the gas pressure of the rubber sealing gasket, simulating the pressure environment of a geothermal well.

[0027] S4. Heat-fluid coupling simulation: A heat source is introduced into the reactor, and the heat flow is realized through the circulation of gas in a sealed transmission loop. The observation window is used to monitor the fluid state and temperature changes inside the reactor, so as to realize real-time monitoring of the experimental process.

[0028] S5. Pressure and temperature recovery control: By controlling the opening and closing of the recovery pipe and its solenoid valve, the gas inside the reactor is recovered and the pressure is balanced, simulating the energy exchange process of the geothermal reservoir under different working conditions.

[0029] S6. Data Acquisition and Adjustment: Based on the changes in heat flow, adjust the winding motor, drive screw, and booster pump to acquire heat flow coupling data under different pressure, flow rate, and temperature conditions, thereby simulating and studying the dynamic characteristics of the enhanced geothermal system.

[0030] According to the above technical solution, in the pressure and temperature recovery control process in S5, the rebound force of the rubber sealing gasket is adjusted by the limit spring to control the flow rate and pressure fluctuation of the gas fluid in the transfer pipe.

[0031] Meanwhile, the pulsed opening and closing of the solenoid valve enables precise control of the discharge rhythm of the recovery pipe, thereby simulating the heat flow response characteristics of the enhanced geothermal system under different strata permeability.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. Equipped with a fixed component, the drive screw is rotated inside the groove, allowing the sliding block to slide on the outside of the sliding rod. When the two rocks are precisely moved to the desired test position, the operator can stop moving the sliding block. At this time, the drive screw will act as a limit switch to fix the two rocks, thereby ensuring the accuracy of the experimental data, facilitating the operator's rapid development of geothermal energy, and ensuring the safety of the development. The movement of the sliding support arm allows the operator to move the rocks more stably and quickly, further improving experimental efficiency.

[0034] 2. Equipped with a pressurization component, the air inside the reactor is rapidly extracted through the gas collection pipe and the gas outlet pipe and stored inside the pressurization pump. At this time, the inside of the reactor can simulate the underground vacuum environment. When a high-pressure environment is required inside the reactor, the operator can control the pressurization pipe to deliver gas into the transfer pipe. This not only allows the reactor to simulate the underground high-pressure environment, but also allows the harmful gases extracted from the reactor after chemical reaction to be reused, thereby preventing these harmful gases from spreading into the air and endangering the safety of the experimental personnel. Attached Figure Description

[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0036] In the attached diagram:

[0037] Figure 1 This is a schematic diagram of the structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the installation structure of the sliding rod of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of the fixing component of the present invention;

[0040] Figure 4 This is a schematic diagram of the installation structure of the fixing groove plate of the present invention;

[0041] Figure 5 This is a schematic diagram of the installation structure of the metal fixing strap of the present invention;

[0042] Figure 6 This is a schematic diagram of the installation structure of the air outlet pipe of the present invention;

[0043] Figure 7 This is a schematic diagram of the supercharging component of the present invention;

[0044] Figure 8 This is a schematic diagram of the steps and structure of the design method of the present invention;

[0045] Labels in the diagram: 1. Support frame;

[0046] 2. Fixing components; 201. Reactor; 202. Sliding rail; 203. Sliding support arm; 204. Winding motor; 205. Winding reel; 206. Winding cable; 207. Fixing plate; 208. Mounting ring plate; 209. Mounting chamber; 210. Sliding rod; 211. Sliding block; 212. Embedded groove; 213. Threaded tube; 214. Drive screw; 215. Drive threaded groove; 216. Sliding groove; 217. Fixing groove plate; 218. Fixing groove; 219. Snap-fit ​​block; 220. Metal fixing strap; 221. Fixing screw; 222. Observation window;

[0047] 3. Boosting assembly; 301. Air collection pipe; 302. Air outlet pipe; 303. Boost pump; 304. Air inlet; 305. Pressurization pipe; 306. Sealing pipe; 307. Transfer pipe; 308. Limiting ring; 309. Limiting spring; 310. Rubber sealing gasket; 311. Vent groove; 312. Recovery pipe; 313. Solenoid valve. Detailed Implementation

[0048] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0049] Example: Figures 1-7 As shown, the present invention provides a technical solution, an enhanced geothermal system heat flow coupling simulation device and optimization design method, including a support frame 1, and a fixing component 2 installed at the top of the support frame 1;

[0050] The fixed assembly 2 includes a reactor 201, a sliding rail 202, a sliding support arm 203, a winding motor 204, a winding reel 205, a winding steel cable 206, a fixing plate 207, a mounting ring plate 208, a mounting chamber 209, a sliding rod 210, a sliding block 211, an embedded groove 212, a threaded pipe 213, a drive screw 214, a drive threaded groove 215, a sliding groove 216, a fixing groove plate 217, a fixing groove 218, a snap-fit ​​block 219, a metal fixing strap 220, a fixing screw 221, and an observation window 222;

[0051] A reactor 201 is installed at the top of the support frame 1. A sliding rail 202 is provided on one side of the support frame 1. A sliding support arm 203 is slidably installed at the top of the sliding rail 202. A winding motor 204 is installed at the top of the sliding support arm 203. A winding reel 205 is connected to the transmission end of the winding motor 204.

[0052] A winding steel cable 206 is wound around the outer side of the winding reel 205. One end of the winding steel cable 206 is connected to a fixing plate 207. A mounting ring plate 208 is welded to the bottom end of the fixing plate 207. An installation chamber 209 is opened on the inner side of the mounting ring plate 208. A sliding rod 210 is welded to the inner side of the installation chamber 209. A sliding block 211 is slidably installed on the outer side of the sliding rod 210. Two sliding blocks 211 are provided. The two sliding blocks 211 are symmetrically slidably installed on the outer side of the sliding rod 210 to facilitate the adjustment of the spacing.

[0053] An embedding groove 212 is provided on the inner side of the mounting ring plate 208. A threaded tube 213 is embedded in the inner side of the embedding groove 212. A drive screw 214 is threadedly connected to the inner side of the threaded tube 213. A drive thread groove 215 is provided at the middle position of the inner side of the drive screw 214. The drive screw 214 is connected to the drive thread groove 215. The input end of the winding motor 204 is electrically connected to the output end of the external power supply for easy and quick position adjustment.

[0054] A fixing groove plate 217 is welded to the bottom end of the sliding block 211. A connecting groove is provided on the inner side of the fixing groove plate 217 at the position corresponding to the fixing screw 221. The fixing screw 221 passes through the connecting groove and connects with the fixing groove plate 217, which is beneficial to the stability of rock fixing. Two fixing groove plates 217 are provided, and the two fixing groove plates 217 are symmetrically welded at the bottom position of the sliding block 211, which is beneficial to fixing the rock. A fixing groove 218 is provided on the inner side of the fixing groove plate 217. A snap-fit ​​block 219 is snapped into the inner side of the fixing groove 218. A metal fixing band 220 is welded to the bottom end of the snap-fit ​​block 219.

[0055] The inner side of the sliding block 211 is provided with a sliding groove 216. There are two sliding grooves 216, which are symmetrically provided on the inner side of the sliding block 211.

[0056] The inner side of the fixed groove plate 217 is threaded with a fixed screw 221, and the outer front of the reaction vessel 201 is provided with an observation window 222.

[0057] A pressurization assembly 3 is installed at the bottom of the reactor 201;

[0058] The booster assembly 3 includes an air collection pipe 301, an air outlet pipe 302, a booster pump 303, an air inlet end 304, a pressurization pipe 305, a sealing pipe 306, a transfer pipe 307, a limit ring 308, a limit spring 309, a rubber sealing gasket 310, a venting groove 311, a recovery pipe 312, and a solenoid valve 313.

[0059] The bottom end of the reactor 201 is connected to a gas collecting pipe 301, and the bottom end of the gas collecting pipe 301 is connected to a gas outlet pipe 302. A booster pump 303 is installed at the bottom of the reactor 201. The gas inlet of the booster pump 303 is connected to a gas inlet end 304. The gas outlet pipe 302 is connected to the gas inlet end 304. The input end of the booster pump 303 is electrically connected to the output end of an external power supply to prevent gas leakage. The gas outlet end of the booster pump 303 is connected to a pressurizing pipe 305. The gas outlet end of the pressurizing pipe 305 is connected to a sealing pipe 306. The gas outlet end of the sealing pipe 306 is connected to a transfer pipe 307.

[0060] A limiting ring 308 is welded to the inner side of the transfer pipe 307, and a limiting spring 309 is spot-welded to the top of the limiting ring 308. A rubber sealing gasket 310 is slidably installed on the inner side of the transfer pipe 307. The outer diameter of the rubber sealing gasket 310 is equal to the inner diameter of the transfer pipe 307. The recovery pipe 312 is connected to the internal cavity of the transfer pipe 307 for easy pressurization. A venting groove 311 is opened on the inner side of the limiting ring 308. The recovery pipe 312 is connected to the outer side of the transfer pipe 307, and a solenoid valve 313 is sleeved on the outer side of the recovery pipe 312.

[0061] Furthermore, such as Figure 8 The following is an example of an optimized design method for a simulation device of heat flux coupling in an enhanced geothermal system, comprising the following steps:

[0062] S1. Experimental preparation: Fix the reactor 201 to the top of the support frame 1, drive the winding reel 205 to rotate through the winding motor 204, drive the winding steel cable 206 to pull the installation ring plate 208 and sliding block 211, and complete the positioning and stable fixing of the experimental device.

[0063] S2. Adjustment of fixed components: By cooperating with the drive screw 214 and the drive threaded groove 215, the position of the sliding block 211 on the sliding rod 210 is adjusted to realize the simulation of force at different depths and angles. At the same time, the fixed screw 221 is used to lock the snap-fit ​​block 219 and the metal fixing band 220 to stabilize the structure.

[0064] S3, Pressurization and Fluid Circulation: Start the booster pump 303, draw in the working medium through the air inlet 304, and transmit it through the pressurization pipe 305, sealing pipe 306 and transfer pipe 307. By using the cooperation of the limit ring 308 and the limit spring 309, the rubber sealing gasket 310 can dynamically adjust the gas pressure to simulate the pressure environment of the geothermal well.

[0065] S4. Heat-fluid coupling simulation: A heat source is introduced into the reactor 201. Through the circulation of gas in the sealed transmission loop, the heat flow in the system is realized through conduction and convection. The observation window 222 is used to monitor the fluid state and temperature changes inside the reactor, so as to realize real-time monitoring of the experimental process.

[0066] S5. Pressure and temperature recovery control: Through the opening and closing control of the recovery pipe 312 and its solenoid valve 313, the gas inside the reactor is recovered and the pressure is balanced, simulating the energy exchange process of the geothermal reservoir under different working conditions.

[0067] S6. Data Acquisition and Adjustment: Based on the changes in heat flow, the winding motor 204, drive screw 214, and booster pump 303 are adjusted to acquire heat flow coupling data under different pressure, flow rate, and temperature conditions, thereby simulating and studying the dynamic characteristics of the enhanced geothermal system.

[0068] According to the above technical solution, in the process of pressure and temperature recovery control in S5, the rebound force of the rubber sealing gasket 310 is adjusted by the limit spring 309 to control the flow rate and pressure fluctuation of the gas fluid in the transfer pipe 307.

[0069] Meanwhile, the pulsed opening and closing of the solenoid valve 313 enables precise control of the discharge rhythm of the recovery pipe 312, thereby simulating the heat flow response characteristics of the enhanced geothermal system under different strata permeability.

[0070] The working principle and usage process of this invention are as follows: First, the operator controls the winding motor 204 to rotate, which drives the winding reel 205 to rotate and wind the steel cable 206. The winding reel 205 continuously winds the steel cable 206 and then pulls the fixing plate 207 upward. When the fixing plate 207 is completely separated from the reactor 201, the upward movement of the fixing plate 207 stops. The operator can slide the sliding support arm 203 at the top of the sliding track 202 and slide the sliding support arm 203 to one side. Then, the operator can transport the rock that needs to simulate rock strata cracks to the bottom position of the fixing plate 207. Then, the operator can control the winding motor 204 to rotate in the opposite direction, so that the fixing plate 207 can be lowered. When the fixing plate 207 is lowered to a height that is convenient for the operator to operate, the operator can place the rock at the top position of the metal fixing belt 220 and then continue to lower the fixing plate 207.

[0071] When the fixing plate 207 is moved to the top position of the rock, the operator can insert the snap-fit ​​blocks 219 at both ends of the metal fixing band 220 into the fixing groove 218 inside the fixing groove plate 217. Then, the operator can tighten the fixing screw 221 through the fixing groove plate 217 and the snap-fit ​​blocks 219. Similarly, fix another identical rock at the bottom of the other sliding block 211 to fix both rocks. Then, the operator can rotate the drive screw 214 inside the embedded groove 212 to adjust the sliding block 211 to slide outside the sliding rod 210. When the two rocks are accurately moved to the position where the test is to be conducted, the operator can stop moving the sliding block 211. At this time, the drive screw 214 will play a limiting role to fix the two rocks, thereby ensuring the accuracy of the experimental data, facilitating the operator to quickly develop geothermal energy, and ensuring the safety of the development.

[0072] Next, after the rock is fixed, the operator can lift the fixing plate 207 upward again, and then slide the sliding support arm 203 on the top of the sliding track 202 again. When the fixing plate 207 moves to the top of the reactor 201, the fixing plate 207 can be re-embedded into the top position of the reactor 201, thereby fixing the rock to the inside of the reactor 201. The movement of the sliding support arm 203 makes it easier for the operator to move the rock more stably and quickly, further improving the experimental efficiency.

[0073] Finally, when the experiment begins, if a vacuum environment is required inside the reactor 201, the operator will start the booster pump 303. The operator can quickly extract the air inside the reactor 201 through the gas collecting pipe 301 and the gas venting pipe 302 and store it inside the booster pump 303. At this time, the inside of the reactor 201 can simulate the underground vacuum environment, which facilitates the occurrence of chemical reactions. The operator can observe the chemical reaction inside the reactor 201 through the observation window 222.

[0074] Furthermore, when a high-pressure environment is required inside the reactor 201, the operator can control the pressurization pipe 305 to supply gas into the transfer pipe 307, thereby inputting the extracted gas into the transfer pipe 307. At this time, the interior of the reactor 201 can be pressurized through the rubber sealing gasket 310, thus overcoming the elastic force of the limiting spring 309 to continuously pressurize the interior of the reactor 201. This not only allows the reactor 201 to simulate the high-pressure environment underground, but also allows the harmful gases extracted from the reactor 201 after chemical reaction to be reused, thereby preventing these harmful gases from spreading into the air and endangering the safety of the experimental personnel. After use, the connection between the gas storage device and the recovery pipe 312 can be checked to centrally recover and treat the harmful gases, further ensuring the safety of the experiment.

[0075] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for simulating the heat-fluid coupling effect of an enhanced geothermal system, comprising a support frame (1), characterized in that: A fixing component (2) is installed at the top of the support frame (1); The fixed component (2) includes a reactor (201); The top of the support frame (1) is equipped with a reactor (201), and a sliding rail (202) is provided on one side of the support frame (1). A sliding support arm (203) is slidably installed on the top of the sliding rail (202), and a winding motor (204) is installed on the top of the sliding support arm (203). The transmission end of the winding motor (204) is connected to a winding reel (205). The outer side of the winding reel (205) is wound with a winding steel cable (206). One end of the winding steel cable (206) is connected to a fixing plate (207). The bottom end of the fixing plate (207) is welded with an installation ring plate (208). An installation chamber (209) is opened on the inner side of the installation ring plate (208). A sliding rod (210) is welded on the inner side of the installation chamber (209). A sliding block (211) is slidably installed on the outer side of the sliding rod (210). A pressurization assembly (3) is installed at the bottom of the reactor (201). The pressurization assembly (3) includes an air collection pipe (301); The bottom end of the reactor (201) is connected to a gas collecting pipe (301), the bottom end of the gas collecting pipe (301) is connected to a gas outlet pipe (302), a booster pump (303) is provided at the bottom of the reactor (201), the gas inlet of the booster pump (303) is connected to a gas inlet end (304), the gas outlet end of the booster pump (303) is connected to a pressurizing pipe (305), the gas outlet end of the pressurizing pipe (305) is connected to a sealing pipe (306), and the gas outlet end of the sealing pipe (306) is connected to a transfer pipe (307). A limiting ring (308) is welded to the inner side of the transfer pipe (307), and a limiting spring (309) is spot-welded to the top of the limiting ring (308). A rubber sealing gasket (310) is slidably installed on the inner side of the transfer pipe (307). A venting groove (311) is opened on the inner side of the limiting ring (308). A recovery pipe (312) is connected to the outer side of the transfer pipe (307), and a solenoid valve (313) is sleeved on the outer side of the recovery pipe (312).

2. The enhanced geothermal system heat flux coupling simulation device according to claim 1, characterized in that: The inner side of the sliding block (211) is provided with a sliding groove (216), and there are two sliding grooves (216) symmetrically opened on the inner side of the sliding block (211).

3. The enhanced geothermal system heat flux coupling simulation device according to claim 1, characterized in that: The mounting ring plate (208) has an embedded groove (212) on its inner side, and a threaded tube (213) is embedded in the inner side of the embedded groove (212). A drive screw (214) is threadedly connected to the inner side of the threaded tube (213), and a drive thread groove (215) is provided at the middle position of the inner side of the drive screw (214). The bottom end of the sliding block (211) is welded with a fixing groove plate (217), the inner side of the fixing groove plate (217) is provided with a fixing groove (218), the inner side of the fixing groove (218) is engaged with a snap-fit ​​block (219), and the bottom end of the snap-fit ​​block (219) is welded with a metal fixing band (220). The inner side of the fixed groove plate (217) is threaded with a fixed screw (221), and the outer front of the reaction vessel (201) is provided with an observation window (222).

4. The enhanced geothermal system heat flux coupling simulation device according to claim 3, characterized in that: Two sliding blocks (211) are provided, and the two sliding blocks (211) are symmetrically slidably installed on the outer side of the sliding rod (210); Two fixed groove plates (217) are provided, and the two fixed groove plates (217) are symmetrically welded to the bottom position of the sliding block (211).

5. The enhanced geothermal system heat flux coupling simulation device according to claim 4, characterized in that: A connecting groove is provided on the inner side of the fixing plate (217) at the position corresponding to the fixing screw (221), and the fixing screw (221) passes through the connecting groove and connects to the fixing plate (217); The drive screw (214) is connected to the drive thread groove (215), and the input end of the winding motor (204) is electrically connected to the output end of the external power supply.

6. The enhanced geothermal system heat flux coupling simulation device according to claim 5, characterized in that: The outer diameter of the rubber sealing gasket (310) is equal to the inner diameter of the transfer tube (307), and the recovery tube (312) is connected to the internal cavity of the transfer tube (307).

7. The enhanced geothermal system heat flux coupling simulation device according to claim 5, characterized in that: The air outlet pipe (302) is connected to the air inlet (304), and the input end of the booster pump (303) is electrically connected to the output end of an external power supply.

8. An optimization design method for the optimization design of an enhanced geothermal system heat flux coupling simulation device as described in claim 7, characterized in that: Includes the following steps: S1. Experimental preparation: Fix the reactor (201) on the top of the support frame (1), drive the winding reel (205) to rotate through the winding motor (204), drive the winding steel cable (206) to pull the installation ring plate (208) and the sliding block (211), and complete the positioning and stabilization of the experimental device; S2, Fixing component adjustment: By cooperating with the drive screw (214) and the drive threaded groove (215), the position of the sliding block (211) on the sliding rod (210) is adjusted to realize the force simulation at different depths and angles. At the same time, the fixing screw (221) is used to lock the snap-fit ​​block (219) and the metal fixing band (220) to stabilize the structure. S3, Pressurization and Fluid Circulation: Start the booster pump (303) to draw in the working medium through the air inlet (304), and transmit the pressurized medium through the pressurization pipe (305), sealing pipe (306) and transfer pipe (307). By using the cooperation of the limiting ring (308) and the limiting spring (309), the rubber sealing gasket (310) can dynamically adjust the gas pressure to simulate the pressure environment of the geothermal well. S4. Heat flow coupling simulation: A heat source is introduced into the reactor (201). Through the circulation of gas in the sealed transmission loop, the heat flow is conducted and convection in the system. The observation window (222) is used to monitor the fluid state and temperature change inside the reactor, so as to realize the real-time monitoring of the experimental process. S5. Pressure and temperature recovery control: Through the opening and closing control of the recovery pipe (312) and its solenoid valve (313), the gas inside the reactor is recovered and the pressure is balanced, simulating the energy exchange process of the geothermal reservoir under different working conditions. S6. Data Acquisition and Adjustment: Based on the changes in heat flow, the winding motor (204), drive screw (214) and booster pump (303) are adjusted to acquire heat flow coupling data under different pressure, flow rate and temperature conditions, so as to realize the simulation and research of the dynamic characteristics of the enhanced geothermal system.

9. The optimization design method according to claim 8, characterized in that: In the pressure and temperature recovery control process in S5, the rebound force of the rubber sealing gasket (310) is adjusted by the limit spring (309) to control the flow rate and pressure fluctuation of the gas fluid in the transfer pipe (307). Meanwhile, the pulse opening and closing of the solenoid valve (313) enables precise control of the discharge rhythm of the recovery pipe (312), thereby simulating the heat flow response characteristics of the enhanced geothermal system under different strata permeability.

Images