Two-dimensional test apparatus and method for heat and mass transfer of a heated fluid in a porous medium

Abstract

The application relates to a two-dimensional test device and method for heat and mass transfer of a heating fluid in a porous medium. The two-dimensional test device comprises a gas generating device and a test device box, the test device box containing a porous medium material at a first temperature; the gas generating device generates a heating fluid at a second temperature and injects the heating fluid into the test device box, and then the test device box receives the heating fluid and outputs a first fluid. Wherein the second temperature is higher than the first temperature, the heating fluid is used to increase the temperature of the porous medium material, and the first fluid is a fluid generated by the first temperature and air pressure in the porous medium material in the two-dimensional test device box after being affected by the heating fluid. The heating fluid is sent into the porous medium material such as soil at low temperature, the porous medium material is heated through heat exchange, the gas in the porous medium material can be output, and heat and mass transfer of the overheated fluid in the porous medium can be realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of environmental geotechnics, and particularly relates to a two-dimensional test device and method for heat and mass transfer of heating fluid in porous media. BACKGROUND

[0002] Soil pollution is an important international environmental problem. The number of organic pollution sites in the chemical and smelting industries is huge, which not only restricts economic development, but also poses a great threat to residents' health. Therefore, efficient remediation of contaminated soil is an important issue to be solved in environmental geotechnics. In recent years, in-situ thermal desorption remediation technology has been widely promoted and applied in industrial organic pollution sites in Europe and the United States and other countries as a fast and efficient in-situ remediation technology. Temperature is one of the most critical factors affecting the efficiency of in-situ thermal desorption remediation. In recent years, the method of using fluid as a heating medium to warm up soil has become a focus of attention among scholars.

[0003] However, there is currently a lack of a device and method for studying the heat and mass transfer of superheated fluid in porous media to improve the heating efficiency of soil. SUMMARY

[0004] Therefore, it is necessary to provide a two-dimensional test device and method for heat and mass transfer of heating fluid in porous media to improve the heating efficiency of soil in view of the above technical problems.

[0005] In a first aspect, the application provides a two-dimensional test device for heat and mass transfer of heating fluid in porous media, characterized in that the two-dimensional test device comprises a gas generating device and a test device box, wherein the test device box contains porous medium material at a first temperature.

[0006] The gas generating device is used to generate heating fluid at a second temperature and inject the heating fluid into the test device box. The heating fluid is used to increase the temperature of the porous medium material, and the second temperature is higher than the first temperature.

[0007] The test device box is used to receive the heating fluid and output a first fluid. The first fluid is a fluid generated by the first temperature and gas pressure in the porous medium material in the two-dimensional test device box after being affected by the heating fluid.

[0008] In one embodiment, the two-dimensional test device further comprises an extraction device, which comprises a condensation sub-device and an extraction sub-device.

[0009] The condensation sub-device is used to receive the first fluid output by the test device box and condense the first fluid to obtain condensed water.

[0010] The extraction sub-device is used to extract the condensed water in the condensing sub-device.

[0011] In one embodiment, the two-dimensional test device comprises a heating grid, a constant temperature controller and a constant temperature control panel, the constant temperature controller is connected with the heating grid;

[0012] The constant temperature controller is used to obtain a third temperature input through the constant temperature control panel, and control the temperature of the heating grid according to the third temperature;

[0013] The heating grid is used to heat the porous medium material by using the temperature of the heating grid.

[0014] In one embodiment, the two-dimensional test device further comprises a shunt device and an associated heater, the shunt device is arranged between the gas generating device and the associated heater, the shunt device is connected with the test device box, and the associated heater is arranged in the pipeline connected with the test device box;

[0015] The shunt device is used to shunt the heating fluid to obtain each shunt gas corresponding to each pipeline, and input the shunt gas into the corresponding pipeline;

[0016] The associated heater is used to heat the pipeline according to the temperature of the shunt gas input into the pipeline.

[0017] In one embodiment, the material of the box body of the test device box is polytetrafluoroethylene material; each box plate of the box body is connected and sealed by screws and high-temperature sealing glue; the length of the test device box is 65 cm, the width is 6 cm, and the height is 30 cm;

[0018] The box body of the test device box is used to accommodate the porous medium material.

[0019] In one embodiment, the outer side of the box body is sealed with butterfly lock and tetrafluoroethylene gasket, and the outer side of the fireproof glass is laid with thermal blanket;

[0020] The thermal blanket is used to insulate and keep warm the fireproof glass.

[0021] In one embodiment, the outer side of the fireproof glass is provided with a thermal infrared imager, and the inside of the porous medium material is provided with a temperature sensor;

[0022] The temperature sensor is used to obtain the temperature of the porous medium material in real time;

[0023] The thermal infrared imager is used to acquire the temperature field distribution of the fireproof glass, and determine the temperature field of the porous medium material by comparing the temperature of the porous medium material acquired by the temperature sensor at the same time.

[0024] In one of the embodiments, the porous medium material is internally arranged with a pressure sensor.

[0025] The pressure sensor is used to acquire the pressure of the first fluid in the porous medium material in real time.

[0026] In one of the embodiments, the test device box is provided with fluid injection ports for injecting the heating fluid at both ends of the test device box; the test device box is provided with an extraction well in the middle, and the top of the extraction well is provided with a fluid extraction port.

[0027] The fluid injection port is used to inject the heating fluid into the test device box, so that the heating fluid exchanges heat with the porous medium material in the test device box to obtain the first fluid.

[0028] The fluid extraction port is used to extract the first fluid in the test device box.

[0029] In the second aspect, the application further provides a two-dimensional test method for heat and mass transfer of heating fluid in porous medium, which comprises:

[0030] Generating heating fluid at a second temperature, and injecting the heating fluid into the test device box; the heating fluid is used to increase the temperature of the porous medium material, and the second temperature is higher than the first temperature;

[0031] Receiving the heating fluid and outputting the first fluid; the first fluid is the fluid generated by the first temperature and air pressure in the porous medium material in the two-dimensional test device box after being affected by the heating fluid.

[0032] The two-dimensional test device and method for heat and mass transfer of the heating fluid in the porous medium, the two-dimensional test device for heat and mass transfer of the heating fluid in the porous medium. The two-dimensional test device includes a gas generating device, a test device box, and a porous medium material at a first temperature in the test device box; the gas generating device generates a heating fluid at a second temperature and injects the heating fluid into the test device box, and then the test device box receives the heating fluid and outputs a first fluid. Wherein, the second temperature is higher than the first temperature, the heating fluid is used to increase the temperature of the porous medium material, and the first fluid is the fluid generated by the first temperature and gas pressure in the porous medium material in the two-dimensional test device box after being affected by the heating fluid. In this application, the gas generating device is used to generate the heating fluid for increasing the temperature of the porous medium material, and the heating fluid is sent into the porous medium material such as soil at the first temperature, that is, the heating fluid is sent into the porous medium material such as soil at low temperature, and the porous medium material is heated by heat exchange, the gas in the porous medium material can be output, the heat and mass transfer of the heating fluid in the porous medium can be realized, and the method provided by the embodiment of the application can be used to study the heating efficiency of the heating fluid in the porous medium. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structure diagram of a two-dimensional test device provided by the embodiment of the application is provided.

[0034] Figure 2 A flowchart of a two-dimensional test method provided by the embodiment of the application is provided. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0036] Soil pollution is a significant international environmental issue, and its remediation is a hot topic and a challenging area of ​​research in the environmental field. Industries primarily focused on chemical and metallurgical processes generate a vast number of sites contaminated with organic pollutants, hindering economic development and posing a significant threat to public health. Therefore, efficient remediation of organically contaminated soil is a crucial issue urgently needing resolution in environmental geotechnical engineering. In recent years, in-situ thermal desorption remediation technology, as a rapid and efficient in-situ remediation technique, has been widely promoted and applied in industrial organic-contaminated sites in Europe and the United States. This technology mainly includes heat conduction heating, resistance heating, steam injection heating, and radio frequency microwave heating. When applying in-situ thermal desorption technology to remediate sites, temperature is one of the most critical factors affecting remediation efficiency. However, the widely studied heat conduction heating technology suffers from drawbacks such as uneven temperature fields and high energy consumption, failing to meet the requirements of green and sustainable remediation principles. Steam injection heating involves injecting high-temperature fluids such as steam or dry air into the soil, followed by steam extraction to promote fluid migration within the porous soil medium. The release of latent heat of water vapor and convective heat transfer from the fluid raise the soil temperature, overcoming many drawbacks of the aforementioned thermal conduction heating methods. However, effective control of temperature and fluid boundary conditions during the experiment is lacking, as are effective means of monitoring soil temperature and pressure. Furthermore, there is currently no experimental setup suitable for combining steam injection heating with thermal conduction heating. This study aims to provide fundamental scientific experimental data and technical support for exploring the heating efficiency of superheated steam in unsaturated soil and the combined use of steam injection heating and thermal conduction heating technologies.

[0037] Therefore, this application proposes a two-dimensional experimental apparatus and method for heat and mass transfer of heating fluid in porous media that can improve soil heating efficiency.

[0038] In one embodiment, a two-dimensional experimental apparatus 100 is provided for heat and mass transfer of a heated fluid in a porous medium. Figure 1 This is a schematic diagram of a two-dimensional test device provided in an embodiment of this application. The two-dimensional test device 100 includes a gas generating device 101 and a test device box 102. The test device box contains a porous medium material 103 at a first temperature.

[0039] The gas generating device 101 is used to generate a heating fluid at a second temperature and inject the heating fluid into the test device box 102; the heating fluid is used to increase the temperature of the porous medium material 103, and the second temperature is higher than the first temperature.

[0040] The test apparatus chamber 102 is used to receive the heating fluid and output the first fluid; the first fluid is the fluid generated after the first temperature and pressure in the porous medium material in the two-dimensional test apparatus chamber are affected by the heating fluid.

[0041] The porous media material can be selected from different types of granular materials such as glass beads, natural sand, silt, and clay. The porous media material is prepared according to a specific moisture content and filled into the test device box 102. In addition, a humidity sensor is used to measure the moisture content of the representative points corresponding to the porous media material to ensure that the initial moisture content is relatively uniform. The first temperature can be the normal temperature of the porous media material in the room. The second temperature can be the higher temperature reached by the gas after heating, which is higher than the first temperature. The heating fluid can include superheated steam, air, and a mixture of superheated steam and air. The first fluid can be the fluid generated after the porous media material is affected by the heating fluid.

[0042] In this embodiment, the two-dimensional experimental device 100 includes a gas generating device 101 and an experimental device box 102, in which a porous media material 103 at a first temperature is contained. Distilled water can be fed into the gas generating device to obtain a heated fluid at a second temperature, which is then injected into the experimental device box 102. The heated fluid can raise the temperature of the porous media material 103 through heat exchange. When the temperature rises, the first fluid in the porous media material 103 within the two-dimensional experimental device 100 is output. The first fluid is the fluid generated by the first temperature and pressure within the porous media material in the two-dimensional experimental device box under the influence of the heated fluid.

[0043] This embodiment presents a two-dimensional experimental apparatus and method for heat and mass transfer of a heating fluid in a porous medium. The two-dimensional experimental apparatus includes a gas generator and an experimental chamber containing a porous medium material at a first temperature. The gas generator generates a heating fluid at a second temperature and injects it into the experimental chamber. The experimental chamber then receives the heating fluid and outputs a first fluid. The second temperature is higher than the first temperature. The heating fluid is used to raise the temperature of the porous medium material. The first fluid is the fluid generated by the first temperature and pressure within the porous medium material in the two-dimensional experimental chamber under the influence of the heating fluid. In this application, a gas generator is used to generate a heating fluid to raise the temperature of the porous medium material, and the heating fluid is introduced into a porous medium material such as soil at the first temperature. That is, the heating fluid is introduced into a porous medium material such as soil at a low temperature, heating the porous medium material through heat exchange. The fluid in the porous medium material can be output, realizing heat and mass transfer of the heating fluid in the porous medium. The method provided in this embodiment can be used to study the heating efficiency of the heating fluid in the porous medium.

[0044] In one embodiment, reference Figure 1 The two-dimensional experimental apparatus also includes an extraction device 104, which includes a condenser device 105 and an extraction device 106.

[0045] The condenser device 105 is used to receive the first fluid output from the test device box 102 and condense the first fluid to obtain condensate.

[0046] Extraction device 106 is used to extract condensate from condensation device 105.

[0047] In this embodiment, the two-dimensional experimental apparatus further includes an extraction device 104, which comprises a condenser device 105 and an extraction sub-device 106. A vacuum pump connected to the experimental apparatus housing 102 extracts a first fluid from the fluid extraction port of the experimental apparatus housing 102 and outputs the first fluid to the condenser device 105, which receives the first fluid output from the experimental apparatus housing 102. The extraction device also includes a flow valve and a flow meter for controlling the flow rate of the first fluid extracted by the vacuum pump.

[0048] The condenser unit 105 includes a constant-temperature water bath unit and a heat exchanger. The constant-temperature water bath unit can provide low-temperature water to the heat exchanger, so that the first fluid condenses when it flows through the heat exchanger due to heat exchange with the low-temperature water around the tube wall. That is, the first fluid is condensed to obtain condensate. The extraction unit 106 is used to extract the condensate output from the condenser unit 105.

[0049] In this embodiment, the first fluid in the test device box 102 is extracted, condensed to obtain condensate, and then the condensate is extracted so that the first fluid can be discharged from the porous medium material 103.

[0050] In one embodiment, reference Figure 1 The test device box 102 includes a heating grid 107, a constant temperature controller 108 and a constant temperature control panel 109, with the constant temperature controller 108 connected to the heating grid 107.

[0051] The thermostat 108 is used to acquire a third temperature input through the thermostat control panel 108 and control the temperature of the heating grid according to the third temperature.

[0052] Heating grid 107 is used to heat the porous medium material 103 using the temperature of heating grid 107.

[0053] The third temperature is the preset temperature.

[0054] In this embodiment, the test apparatus box 102 includes a heating grid 107, a thermostat 108, and a thermostat control panel 109. The heating grid 107 has holes and can be pre-embedded on both sides of the test apparatus box 102, and is connected to the thermostat 108. The thermostat control panel 109 can be connected to the thermostat 108. A third temperature is input to the thermostat control panel, and the thermostat 108 can acquire the third temperature input through the thermostat control panel and control the temperature of the heating grid 107 according to the third temperature.

[0055] It should be noted that the thermostat 108 controls the temperature of the heating grid 107, and the surface of the heating grid 107 can reach a preset temperature by setting the temperature on the thermostat control panel 109. Temperature sensors can be locally embedded in the test chamber to monitor temperature changes of the porous medium inside the test chamber.

[0056] In this embodiment, a heating grid 107, a thermostat 108, and a thermostat control panel 109 are arranged in the test chamber 102. The heating grid 107 can be used to further heat the porous medium material 103 in the test chamber 102, thereby achieving heat exchange between the fluid and the soil through gas flow. When the heating grid and heated fluid injection are used simultaneously to achieve heat and mass transfer of the fluid in the porous medium, a heating effect of high-temperature fluid injection and heat conduction coupled can be achieved, improving the efficiency of heat transfer.

[0057] In one embodiment, reference Figure 1 The two-dimensional test apparatus 100 also includes a flow divider 110 and a companion heater 111. The flow divider 110 is disposed between the gas generator 101 and the companion heater 111. The flow divider 110 is connected to the test apparatus box 102, and the companion heater 111 is disposed in the pipe connecting the flow divider 110 and the test apparatus box 102.

[0058] The flow divider 110 is used to divide the heating fluid to obtain each flow divider gas corresponding to each pipe, and input the flow divider gas into the corresponding pipe.

[0059] The accompanying heater 111 is used to heat the pipeline according to the temperature of the diverted gas input into the pipeline.

[0060] The diversion device 110 can be configured according to the actual usage, such as a three-way or four-way valve.

[0061] In this embodiment, the two-dimensional testing apparatus 100 further includes a flow-dividing device 110 and a companion heater 111. The flow-dividing device 110 is disposed between the gas generator 101 and the companion heater 111, and is connected to the testing apparatus housing 102. The companion heater 111 is disposed in the pipeline connecting the flow-dividing device 110 and the testing apparatus housing 102. The flow-dividing device 110 can divide the heating fluid to obtain separate gas streams corresponding to each pipeline, and input the divided gas into the corresponding pipelines. The companion heater 111 can heat the pipeline according to the temperature of the divided gas input into the pipeline, and can control the temperature around the pipeline to above 100 degrees Celsius.

[0062] In this embodiment, the gas diversion control can be achieved by setting the diversion device 110, and the diverted gas can be heated by the accompanying heater 111 to avoid condensation of the diverted gas in the pipeline.

[0063] In one embodiment, reference Figure 1 The gas generating device 101 also includes a dual plunger pump 112, an evaporator 113 and a superheater 114. The first end of the evaporator 113 is connected to the dual plunger pump 112, and the second end of the evaporator 113 is connected to the superheater 114.

[0064] A dual-plunger pump 112 is used to deliver distilled water to the evaporator 113.

[0065] Evaporator 113 is used to heat distilled water to obtain a second gas.

[0066] The superheater 114 is used to heat the second gas to a preset temperature to obtain the third gas; the heating fluid includes the third gas.

[0067] The second gas can be saturated vapor; the third gas can be superheated vapor. The heating fluid includes the third gas.

[0068] In this embodiment, the gas generating device 101 further includes a dual-plunger pump 112, an evaporator 113, and a superheater 114. The first end of the evaporator 113 is connected to the dual-plunger pump 112, and the second end of the evaporator 113 is connected to the superheater 114. The dual-plunger pump 112 can supply a preset flow rate of distilled water to the evaporator 113; the evaporator 113 can heat the distilled water, causing the liquid water to evaporate and form saturated vapor, i.e., the second gas; the superheater 114 then heats the second gas to a preset temperature, thereby forming a third gas.

[0069] In this embodiment, distilled water is introduced into the evaporator 113 via a dual-plunger pump 112. The evaporator 113 heats the distilled water and converts it into saturated steam. Finally, the saturated steam is heated by the superheater 114 to obtain superheated steam. Since the superheated steam carries a large amount of heat during this process, injecting it into the soil can raise the soil temperature.

[0070] In one embodiment, reference Figure 1 The gas generating device 101 also includes an air compressor 115 and a rotor flow meter 116. The first end of the rotor flow meter 116 is connected to the air compressor 115, and the second end of the rotor flow meter 116 is connected to the third end of the evaporator 114.

[0071] Air compressor 115 is used to compress air and deliver the compressed dry air to evaporator 113 via rotor flow meter 116.

[0072] In this embodiment, air is introduced into an air compressor 115, which compresses the air to obtain dry air. The dry air is then delivered to the evaporator 113 via a rotor flow meter 116. The rotor flow meter 116 measures the flow rate of the dry air. The dry air, along with the distilled water transported by the dual-plunger pump 112 in the above embodiment, passes through the evaporator and superheater to obtain a mixed gas comprising superheated steam, air, and a mixture of air and steam. This mixed gas has an output pressure of 100-300 kPa and a maximum temperature of 300 degrees Celsius.

[0073] In this embodiment, by compressing the air, the dry air required for the experiment can be obtained, and further, the gas required for injection into the test apparatus box 102 can be obtained.

[0074] In one embodiment, a thermal infrared imager is installed on the outer side of the fire-resistant glass, and a temperature sensor is installed inside the porous medium material. The temperature sensor is used to acquire the temperature of the porous medium material in real time. The thermal infrared imager is used to acquire the temperature field distribution of the fire-resistant glass, and to determine the temperature field of the porous medium material by comparing it with the temperature of the porous medium material acquired by the temperature sensor at the same time.

[0075] In this embodiment, a thermal infrared imager can be used to monitor the test chamber 102 throughout the entire test. The thermal infrared imager can be an electrically adjustable online temperature measuring thermal imager with a resolution of 640×512 and a measurement range of -50 degrees Celsius to 500 degrees Celsius. The thermal infrared imager captures images of the front of the test chamber 102, which is made of refractory glass, to obtain images of the temperature field changes on the refractory glass surface. The insulation blanket surrounding the test chamber can be divided into four sections, and the blankets can be opened sequentially and rapidly at specific time intervals to collect infrared images. The collected images are then stitched together using image processing software. Temperature sensors are locally embedded within the test chamber 102 to monitor the temperature changes of the porous medium material 103 inside the test chamber 102, and the temperature information acquired by the thermal infrared imager is corrected. Using a thermal infrared imager, more comprehensive temperature field information can be obtained, and after temperature correction and conversion, the temperature distribution inside the test chamber at any given time can be obtained.

[0076] In one embodiment, a pressure sensor is arranged inside the porous medium material;

[0077] A pressure sensor is used to acquire the pressure of the first fluid in a porous media material in real time.

[0078] In this embodiment, a high-temperature resistant gas pressure sensor is embedded inside the test chamber 102 to monitor changes in gas pressure during the heating process. The two-dimensional test apparatus also includes a temperature and pressure monitoring system for analyzing the monitored temperature and pressure.

[0079] This can be achieved by comparing and correcting the temperature data converted from infrared images with the point data acquired by sensors. This conversion allows us to obtain the distribution and changes of the temperature field inside the model chamber. After temperature conversion and calculation, the temperature change curve at any point can be obtained for subsequent analysis. The relationship is as follows:

[0080] T s (x,y,t)=T g (x,y,t)+ΔT(x,y,t)

[0081] Where x and y are the spatial coordinates of each point in the experimental setup box, t is time, and T is the time interval. g It is the temperature of the glass surface, T s ΔT is the internal temperature of the test chamber, and ΔT is the temperature difference between the glass surface and the internal temperature of the test chamber. This value is obtained by interpolating the infrared temperature data and the point data obtained by the temperature sensor along a linear spatial interpolation.

[0082] By modifying the design of the experimental setup, including the arrangement of the injection port, extraction port, and extraction well, the overall boundary conditions of the setup can be simplified. Furthermore, monitoring the temperature and pressure at the inlet and outlet of the setup provides input and output conditions for subsequent quantitative analysis. This method allows for the combined application of heat conduction heating technology, steam injection technology, and soil gas extraction technology, enabling optimization of their parameter combinations.

[0083] In one embodiment, the test apparatus box 102 is made of polytetrafluoroethylene (PTFE); the panels of the box are sealed with screws.

[0084] The test apparatus housing is used to contain porous media materials.

[0085] In this embodiment, the test apparatus box 102 is made of polytetrafluoroethylene (PTFE); the panels of the box are sealed with screws. The test apparatus box is used to contain porous media materials. The internal dimensions of the test apparatus box 102 are 65 cm long, 6 cm wide, and 30 cm high. The test apparatus box 102, made of PTFE, has high-temperature resistance.

[0086] In one embodiment, the outer side of the enclosure is sealed to the fire-resistant glass using a butterfly latch and a PTFE gasket, and an insulation blanket is laid on the outer side of the fire-resistant glass.

[0087] Thermal insulation blankets are used to insulate and maintain the heat of fire-resistant glass.

[0088] In this embodiment, the outer side of the enclosure is sealed to the fire-resistant glass using a butterfly latch and a PTFE gasket, and an insulation blanket is laid on the outer side of the fire-resistant glass. The insulation blanket is used to insulate the fire-resistant glass. The fire-resistant glass can be high-transparency fire-resistant glass. Using the insulation blanket provided in this embodiment can insulate the fire-resistant glass and improve the efficiency of heat and mass transfer of fluids in porous media.

[0089] In one embodiment, the test device box 102 is provided with fluid injection ports at both ends for injecting heating fluid; an extraction well is provided in the middle of the test device box 102, and a fluid extraction port is provided at the top of the extraction well.

[0090] The fluid inlet is used to inject the heating fluid into the test chamber, so that the heating fluid can transfer heat with the porous medium material inside the test chamber to obtain the first fluid.

[0091] The fluid extraction port is used to extract the first fluid from the test apparatus chamber.

[0092] In this embodiment, the test apparatus box 102 has fluid injection ports at both ends for injecting heating fluid; an extraction well is located in the middle of the test apparatus box 102, and a fluid extraction port is located at the top of the extraction well. The fluid injection ports are used to inject heating fluid into the test apparatus box, allowing the heating fluid to transfer heat with the porous media material inside the test apparatus box to obtain the first fluid. Pressure sensors and temperature sensors can be installed at the fluid injection ports and the fluid extraction ports to monitor the pore gas flow field and the porous media temperature field in the test apparatus box. The test apparatus box provided in this embodiment, with heating fluid injected at both ends and the first fluid extracted in the middle, has simple boundary conditions and is more in line with practical application scenarios.

[0093] Based on the same inventive concept, this application also provides a two-dimensional experimental method for realizing the heat and mass transfer of the heating fluid in a porous medium as described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the two-dimensional experimental method for heat and mass transfer of the heating fluid in a porous medium provided below can be found in the limitations of the two-dimensional experimental device for heat and mass transfer of the heating fluid in a porous medium described above, and will not be repeated here.

[0094] The various modules in the aforementioned two-dimensional experimental apparatus for heat and mass transfer of heated fluids in porous media can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0095] In one embodiment, a two-dimensional experimental method for heat and mass transfer of a heated fluid in a porous medium is provided, with reference to... Figure 2 , Figure 2 This application provides a schematic flowchart of a two-dimensional testing method, which is applied to... Figure 1 Taking a two-dimensional experimental device as an example, the method includes:

[0096] S201. Generate a heating fluid at the second temperature and inject the heating fluid into the test apparatus box; the heating fluid is used to increase the temperature of the porous medium material, and the second temperature is higher than the first temperature.

[0097] S202. Receive the heating fluid and output the first fluid; the first fluid is the fluid generated after the first temperature and pressure in the porous medium material in the two-dimensional test device box are affected by the heating fluid.

[0098] In the aforementioned two-dimensional experimental method for heat and mass transfer of heated fluid in porous media, a gas generator produces a heated fluid at a second temperature and injects it into the experimental chamber. The experimental chamber then receives the heated fluid and outputs a first fluid. The second temperature is higher than the first temperature. The heated fluid is used to increase the temperature of the porous media material. The first fluid is the fluid generated within the porous media material in the two-dimensional experimental chamber after being influenced by the heated fluid, based on the first temperature and gas pressure. In this application, a gas generator is used to produce a heated fluid to increase the temperature of the porous media material, and this heated fluid is then introduced into porous media materials such as soil at the first temperature. That is, the heated fluid is introduced into porous media materials such as soil at low temperatures, heating the porous media material through heat exchange. This allows the output of gas from the porous media material, achieving heat and mass transfer of the fluid within the porous media.

[0099] It should be noted that using the apparatus and method provided in this application alters the overall design of the two-dimensional model box, including the arrangement of the injection port, extraction port, and extraction well, simplifying the overall boundary conditions of the model. Simultaneously, monitoring the temperature and pressure at the inlet and outlet provides input and output conditions for subsequent quantitative analysis; more comprehensive temperature field information is obtained, and after temperature correction and conversion, the temperature distribution inside the model box at any given time can be obtained. A high-temperature resistant gas pressure sensor can monitor the distribution of the gas pressure field inside the model box during heating; the combined application of heat conduction heating technology and steam injection technology can be realized, and their parameter combinations can be optimized.

[0100] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0101] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0102] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0103] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A two-dimensional experimental apparatus for heat and mass transfer of a heated fluid in a porous medium, characterized in that, The two-dimensional test apparatus includes a gas generating device and a test apparatus box, wherein the test apparatus box contains a porous medium material at a first temperature; the gas generating device includes a dual-plunger pump, an evaporator, a superheater, an air compressor, and a rotor flow meter, wherein the dual-plunger pump is connected to the evaporator, the evaporator is connected to the superheater and the rotor flow meter, and the rotor flow meter is connected to the air compressor; The gas generating device is used to generate a heating fluid at a second temperature and inject the heating fluid into the test device box; the heating fluid is used to increase the temperature of the porous medium material, the second temperature being higher than the first temperature; the air compressor compresses air to obtain dry air, and the dry air is delivered to the evaporator via the rotor flow meter; the dual plunger pump delivers distilled water to the evaporator; the distilled water delivered by the dual plunger pump is evaporated in the evaporator to obtain saturated steam; the saturated steam and the dry air are heated by the superheater to obtain a mixed gas including superheated steam, air, and a mixture of air and steam; The test apparatus chamber is used to receive the heated fluid and output a first fluid; the first fluid is the fluid generated after the first temperature and pressure in the porous medium material in the test apparatus chamber are affected by the heated fluid. The two-dimensional test apparatus further includes a flow divider and a companion heater. The flow divider is disposed between the gas generator and the companion heater. The flow divider is connected to the test apparatus box, and the companion heater is disposed in the pipeline connecting the flow divider and the test apparatus box. The diversion device is used to divert the heating fluid to obtain each diversion gas corresponding to each of the pipes, and input the diversion gas into the corresponding pipes; The accompanying heater is used to heat the pipeline according to the temperature of the diverted gas input into the pipeline, and can control the temperature around the pipeline to above 100 degrees Celsius. The test apparatus box is made of polytetrafluoroethylene (PTFE); the various panels of the box are connected and sealed with screws and high-temperature sealant; the length, width, and height ratio of the test apparatus box is 10:1:

5. The housing of the test apparatus is used to contain the porous media material; The outer side of the enclosure is sealed to the fire-resistant glass with a butterfly lock and a PTFE gasket, and an insulation blanket is laid on the outer side of the fire-resistant glass. The insulation blanket is used for heat insulation of the fire-resistant glass; A thermal infrared imager is installed on the outer side of the fire-resistant glass, and a temperature sensor and a pressure sensor are installed inside the porous medium material. The temperature sensor is used to acquire the temperature of the porous medium material in real time; The thermal infrared imager is used to acquire the temperature field distribution of the refractory glass, and based on the following target formula, compares the temperature of the porous medium material acquired by the temperature sensor at the same time to obtain the temperature distribution inside the model box at any time; the target formula is as follows: Where x and y are the spatial coordinates of each point in the experimental setup box, t is time, and T is the time interval. g It is the temperature of the glass surface, T s It is the internal temperature of the test chamber, and ΔT is the temperature difference between the glass surface and the internal temperature of the test chamber. ΔT is obtained by interpolating the infrared temperature data and the point data obtained by the temperature sensor along a linear spatial interpolation. The pressure sensor is used to acquire the pressure of the first fluid in the porous medium material in real time; The test device box has fluid injection ports at both ends for injecting the heating fluid; an extraction well is provided in the middle of the test device box, and a fluid extraction port is provided at the top of the extraction well. The fluid injection port is used to inject the heating fluid into the test device box, so that the heating fluid and the porous medium material in the test device box can transfer heat to obtain the first fluid; The fluid extraction port is used to extract the first fluid from the test device box.

2. The two-dimensional experimental apparatus according to claim 1, characterized in that, The two-dimensional experimental apparatus further includes an extraction device, which comprises a condenser device and an extraction device. The condenser is used to receive the first fluid output from the test device box and to condense the first fluid to obtain condensate. The extraction device is used to extract the condensate from the condenser device.

3. The two-dimensional experimental apparatus according to claim 1, characterized in that, The two-dimensional test device includes a heating grid, a constant temperature controller, and a constant temperature control panel, wherein the constant temperature controller is connected to the heating grid. The constant temperature controller is used to acquire a third temperature input through the constant temperature control panel and control the temperature of the heating grid according to the third temperature. The heating grid is used to heat the porous medium material using the temperature of the heating grid.

4. A two-dimensional experimental method for heat and mass transfer of a heated fluid in a porous medium, characterized in that, The method is applied to the two-dimensional experimental apparatus as described in any one of claims 1-3, and the method includes: A heating fluid at a second temperature is generated and injected into the test apparatus chamber; the heating fluid is used to increase the temperature of the porous medium material, wherein the second temperature is higher than the first temperature. The device receives the heated fluid and outputs a first fluid; the first fluid is the fluid generated after the first temperature and pressure in the porous medium material in the two-dimensional test device chamber are affected by the heated fluid.

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