Experimental device of geothermal heat exchanger
By designing a geothermal heat exchanger experimental device to simulate geological layers and heat exchange wells, and using temperature sensors to detect temperature changes in the U-shaped tube, the problem of insufficient authenticity of experimental data before geothermal energy extraction was solved, and high-precision experimental data acquisition was achieved.
Patent Information
- Application Number
- CN202520031748.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Before geothermal energy extraction, existing technologies are unable to effectively simulate the heat exchange of geothermal heat exchangers, resulting in insufficient authenticity of experimental data.
Design an experimental device for a geothermal heat exchanger, including a shell, a U-shaped tube, a hot water circulation structure, and a constant temperature water supply structure. By simulating geological layers and heat exchange wells, the heat exchange process is simulated by using temperature sensors to detect temperature changes at both ends of the U-shaped tube.
This improved the authenticity and accuracy of experimental data for geothermal heat exchangers, ensuring the reliability of data before construction.
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Figure CN223581409U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the experimental technical field of geothermal heat exchanger, more particularly, relate to a kind of experimental device of geothermal heat exchanger. BACKGROUND
[0002] Geothermal resources have the characteristics of shallow burial, wide distribution, large reserves and wide utilization range. In recent years, the development scale has shown an increasing trend, and good economic and social environmental benefits have been achieved. As a method of non-exploration of geothermal fluid and closed cycle heat extraction, the development technology of medium-deep geothermal energy in "underground heat exchange" can solve a series of problems caused by geothermal tail water recharge. Therefore, the prospect of developing efficient "underground heat exchange" technology is very broad.
[0003] As a clean energy, geothermal resources mainly include pore type, karst type and fissure type heat reservoirs. Taking the pore type layered heat reservoir as an example, a heat exchange well can be drilled, and underground heat exchange can be carried out using heat exchange pipes. However, based on the detection of heat reservoir temperature, heat reservoir thickness and heat reservoir lithology, etc., before geothermal energy exploitation, geothermal heat exchanger needs to be experimented to obtain certain experimental data before construction. UTILITY MODEL CONTENT
[0004] The utility model aims to provide a kind of experimental device of geothermal heat exchanger, simulate geothermal heat exchanger to carry out heat exchange experiment, to obtain certain experimental data before construction, and improve the authenticity of experimental data.
[0005] To achieve the above purpose, the utility model provides a kind of experimental device of geothermal heat exchanger, comprising:
[0006] The shell is internally provided with a first containing groove, the first containing groove is internally provided with an annular partition, a second containing groove is formed inside the partition, and a geological simulation layer is arranged inside the second containing groove, and a third containing groove is formed inside the geological simulation layer;
[0007] The U-shaped pipe can be inserted into the third containing groove, and the two ends of the U-shaped pipe are respectively provided with a first temperature sensor and a second temperature sensor;
[0008] The heat exchange water circulation structure is connected with the U-shaped pipe;
[0009] The constant-temperature water supply structure is connected with the shell and is used to supply constant-temperature water to the outside of the partition in the first containing groove.
[0010] Optionally, an annular constant-temperature water tank is formed on the outside of the partition in the first containing groove, and a water inlet and a water outlet are respectively arranged on the opposite sides of the shell and communicate with the constant-temperature water tank.
[0011] Optionally, the geological simulation layer comprises a plurality of rock layers.
[0012] Optionally, the size of the third accommodating groove and the size of the U-shaped tube are respectively obtained by reducing the size of the simulated heat exchange well and the size of the simulated heat exchange tube in the same setting ratio.
[0013] Optionally, the heat exchange water circulation structure comprises a first container and a second container, the first container and the second container are connected with two ends of the U-shaped tube through a first pipeline and a second pipeline respectively, and a first pump is arranged on the first pipeline.
[0014] Optionally, the constant temperature water supply structure comprises a constant temperature water tank, the constant temperature water tank is connected with the water inlet and the water outlet through a water supply pipe and a backwater pipe respectively, and a second pump is arranged on the water supply pipe.
[0015] Optionally, a heater is arranged in the constant temperature water tank.
[0016] Optionally, a control unit is arranged on the outside of the constant temperature water tank, a third temperature sensor is arranged in the constant temperature water tank, and the heater and the third temperature sensor are connected with the control unit.
[0017] Optionally, a drain port is arranged on the side wall of the shell, and a detachable plugging part is arranged in the drain port.
[0018] Optionally, a water supply port and a backwater port are arranged on one side of the constant temperature water tank, and the water supply pipe and the backwater pipe are connected with the water supply port and the backwater port respectively.
[0019] The experimental device of the geothermal heat exchanger has the beneficial effects that: the experimental device of the geothermal heat exchanger is provided with a first accommodating groove in the shell, an annular partition plate is arranged in the first accommodating groove, a second accommodating groove is formed by the partition plate, an annular space is formed on the outside of the partition plate, constant temperature water can be supplied into the annular space through a constant temperature water supply structure, a geothermal water environment is simulated, a geological simulation layer is arranged in the second accommodating groove, an underground heat reservoir is simulated, a third accommodating groove is formed in the geological simulation layer, a heat exchange well is simulated by the third accommodating groove, a U-shaped tube can be inserted into the third accommodating groove, a heat exchange tube is simulated by the U-shaped tube, heat exchange is carried out in the third accommodating groove through the U-shaped tube, a first temperature and a second temperature of two ends of the U-shaped tube are detected by a first temperature sensor and a second temperature sensor respectively, so as to reflect the water temperature of heat exchange water before and after heat exchange of the U-shaped tube, and the water temperature is used as experimental data; the experimental device of the geothermal heat exchanger can well simulate the heat exchange condition of the heat exchanger in the heat exchange well, experimental data can be obtained before construction, and the authenticity of the experimental data is improved.
[0020] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0021] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout and in which:
[0022] Figure 1 Fig. 1 shows a structural schematic diagram of an experimental device of a geothermal heat exchanger according to an embodiment of the present application.
[0023] Figure 2 Fig. 1 shows a structural schematic diagram of an experimental device of a geothermal heat exchanger according to an embodiment of the present application.
[0024] Figure 3 Fig. 1 shows a structural schematic diagram of an experimental device of a geothermal heat exchanger according to an embodiment of the present application.
[0025] Figure 4 Fig. 1 shows a structural schematic diagram of an experimental device of a geothermal heat exchanger according to an embodiment of the present application.
[0026] BRIEF DESCRIPTION OF DRAWINGS
[0027] 1, shell; 2, partition; 3, geological simulation layer; 4, third containing groove; 5, U-shaped pipe; 6, constant temperature water tank; 7, constant temperature water tank; 8, water supply pipe; 9, return water pipe; 10, second pump; 11, heater; 12, control unit; 13, drain; 14, return port. DETAILED DESCRIPTION
[0028] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.
[0029] To simulate the heat exchange experiment of the geothermal heat exchanger, to master certain experimental data before construction, and to improve the authenticity of the experimental data; the present application provides an experimental device of a geothermal heat exchanger, comprising:
[0030] The shell is internally provided with a first accommodating groove, the first accommodating groove is internally provided with an annular partition plate, a second accommodating groove is formed in the interior of the partition plate, and a geology simulation layer is arranged in the interior of the second accommodating groove, and a third accommodating groove is formed in the interior of the geology simulation layer;
[0031] The U-shaped pipe is capable of being inserted into the third accommodating groove, and the two ends of the U-shaped pipe are respectively provided with a first temperature sensor and a second temperature sensor;
[0032] The heat exchange water circulation structure is connected with the U-shaped pipe.
[0033] The constant-temperature water supply structure is connected with the shell and is used for supplying constant-temperature water to the outside of the partition plate in the first accommodating groove.
[0034] Specifically, the experimental device of the geothermal heat exchanger is internally provided with the first accommodating groove, the interior of the first accommodating groove is provided with the annular partition plate, a second accommodating groove is formed by the partition plate, an annular space is formed on the outside of the partition plate, constant-temperature water can be supplied to the annular space through the constant-temperature water supply structure to simulate the geothermal water environment, the geology simulation layer is arranged in the interior of the second accommodating groove to simulate the underground heat reservoir, a third accommodating groove is formed in the interior of the geology simulation layer to simulate the heat exchange well, the U-shaped pipe can be inserted into the third accommodating groove to simulate the heat exchange pipe, heat exchange is carried out in the third accommodating groove through the U-shaped pipe, the first temperature and the second temperature of the two ends of the U-shaped pipe are detected through the first temperature sensor and the second temperature sensor respectively, so as to reflect the water temperature of the heat exchange water before and after heat exchange of the U-shaped pipe as experimental data; the experimental device of the geothermal heat exchanger can well simulate the heat exchange condition of the heat exchanger in the heat exchange well, experimental data is obtained before construction, and the authenticity of the experimental data is improved.
[0035] Further, water can also be injected into the third accommodating groove during the experiment to simulate the condition that there is geothermal water in the heat exchange well, and the authenticity of the experiment is further improved.
[0036] Optionally, an annular constant-temperature water groove is formed on the outside of the partition plate in the first accommodating groove, and a water inlet and a water outlet are respectively arranged on the opposite sides of the shell and are in communication with the constant-temperature water groove.
[0037] Specifically, the partition plate is arranged at the central part in the interior of the shell, and the annular constant-temperature water groove is formed between the outside of the partition plate and the inner wall of the shell, the constant-temperature water is accommodated in the constant-temperature water groove, the constant-temperature water is subjected to heat transfer through the partition plate and the geology simulation layer, and then is subjected to heat exchange through the U-shaped pipe, and the water inlet and the water outlet are respectively arranged on the outer wall of the shell and are used for the entry and exit of the constant-temperature water and are connected with the constant-temperature water supply structure.
[0038] Optionally, the geology simulation layer comprises a plurality of rock layers.
[0039] Specifically, a plurality of rock layers form a geological simulation layer, simulating the formation structure of an actual heat reservoir, and an experimenter can set the types and number of rock layers according to the needs of the experiment.
[0040] Optionally, the size of the third accommodating groove and the size of the U-shaped tube are respectively reduced in the same setting ratio according to the size of the simulated heat exchange well and the size of the simulated heat exchange tube.
[0041] Specifically, the heat exchange tube and the heat exchange well are scaled in the same ratio according to the similarity principle, which makes the physical process in the experimental device similar to the physical process in the prototype. The U-shaped tube simulates the heat exchange tube, the third accommodating groove simulates the heat exchange well, and the geological simulation layer simulates the lithology around the heat exchange well. In the heat transfer process, the thermal physical parameters of the rock and soil are very close to the actual situation, which increases the stability and accuracy of the experimental data in the experimental process.
[0042] Optionally, the heat exchange water circulation structure includes a first container and a second container, and the first container and the second container are connected with the two ends of the U-shaped tube through a first pipeline and a second pipeline, respectively.
[0043] Specifically, the two ends of the U-shaped tube are connected with the first container and the second container through the first pipeline and the second pipeline, respectively. The first container is used to store heat exchange water, and the second container is used to store heat-exchanged water. The heat exchange water flows into one end of the U-shaped tube under the pumping action of the first pump, flows through the U-shaped tube and exchanges heat in the third accommodating groove, and then the heat-exchanged water flows out from the other end of the U-shaped tube, flows into the second container through the second pipeline, and in this process, the first temperature sensor and the second temperature sensor detect the temperatures of the heat exchange water and the heat-exchanged water at the positions of the two ends of the U-shaped tube, respectively, to obtain experimental data.
[0044] Optionally, the constant-temperature water supply structure includes a constant-temperature water tank, and the constant-temperature water tank is connected with the water inlet and the water outlet through a water supply pipe and a water return pipe, respectively.
[0045] Specifically, the constant-temperature water tank stores constant-temperature water, and the constant-temperature water flows into the housing through the water supply pipe under the pumping action of the second pump, i.e. into the constant-temperature water tank, to provide a constant-temperature environment in the housing. The constant-temperature water returns to the constant-temperature water tank through the water return pipe, and continuous water supply and water return keep the constant-temperature water tank always filled with constant-temperature water.
[0046] Optionally, the constant-temperature water tank is provided with a heater inside.
[0047] Specifically, the heater provided in the constant-temperature water tank can heat the water in the constant-temperature water tank to become constant-temperature water. The heat provided by the heater just makes up for the heat loss due to heat exchange and heat dissipation, maintaining the constant temperature of the constant-temperature water.
[0048] Optionally, the constant-temperature water tank is provided with a control unit outside, and a third temperature sensor inside; the heater and the third temperature sensor are connected with the control unit.
[0049] Specifically, the third temperature sensor is used for detecting the water temperature in the constant-temperature water tank, and the control unit is used for controlling the heating power of the heater according to the detection result of the third temperature sensor, so that the water temperature in the constant-temperature water tank is kept as constant as possible, thereby forming constant-temperature water; the control principle of the control unit is similar to the temperature control principle of a household electric water heater.
[0050] Optionally, the side wall of the shell is provided with a drainage port, and a detachable plugging component is arranged in the drainage port.
[0051] Specifically, the constant-temperature water in the constant-temperature water tank in the shell can be drained through the drainage port after the experiment, and the plugging component can be a rubber plug which can plug and open the drainage port.
[0052] Optionally, one side of the constant-temperature water tank is provided with a water supply port and a water return port, and a water supply pipe and a water return pipe are connected with the water supply port and the water return port respectively.
[0053] Specifically, the constant-temperature water tank realizes the output of the constant-temperature water in the tank through the water supply port, and realizes the return of the constant-temperature water after flowing through the constant-temperature water tank through the water return port.
[0054] Embodiment
[0055] As shown in Figure 1 The utility model provides a kind of experimental device of geothermal heat exchanger, comprising:
[0056] Shell 1, the inside of shell 1 is provided with first containing groove, annular baffle 2 is provided in the inside of first containing groove, second containing groove is formed in the inside of baffle 2, geology simulation layer 3 is provided in the inside of second containing groove, third containing groove 4 is formed in the inside of geology simulation layer;
[0057] U-shaped pipe 5, U-shaped pipe 5 can be inserted in third containing groove 4, first temperature sensor and second temperature sensor are respectively provided at the both ends of U-shaped pipe 5;
[0058] Heat exchange water circulation structure, heat exchange water circulation structure is connected with U-shaped pipe 5;
[0059] Constant-temperature water supply structure, constant-temperature water supply structure is connected with shell 1, and is used to supply constant-temperature water to the outside of baffle 2 in first containing groove.
[0060] In the embodiment, shell 1 is sand box shell.
[0061] In the embodiment, the first accommodating groove is annular and formed inside the outer side of the partition 2, and the opposite sides of the shell 1 are respectively provided with a water inlet and a water outlet which are communicated with the constant-temperature water groove 6.
[0062] In the embodiment, the geological simulation layer 3 comprises a plurality of rock layers.
[0063] In the embodiment, the third accommodating groove 4 and the U-shaped pipe 5 are respectively reduced in size according to the size of the simulated heat exchange well and the size of the simulated heat exchange pipe in the same setting ratio.
[0064] In the embodiment, the heat exchange water circulation structure comprises a first container and a second container, the first container and the second container are respectively connected with the two ends of the U-shaped pipe 5 through a first pipeline and a second pipeline, and the first pipeline is provided with a first pump.
[0065] In the embodiment, the constant-temperature water supply structure comprises a constant-temperature water tank 7, the constant-temperature water tank 7 is connected with the water inlet and the water outlet through a water supply pipe 8 and a water return pipe 9 respectively, and the water supply pipe 8 is provided with a second pump 10.
[0066] In the embodiment, the constant-temperature water tank 7 is internally provided with a heater 11.
[0067] In the embodiment, the heater 11 is an electric heater 11.
[0068] In the embodiment, the constant-temperature water tank 7 is externally provided with a control unit 12, the constant-temperature water tank 7 is internally provided with a third temperature sensor, and the heater 11 and the third temperature sensor are connected with the control unit 12.
[0069] In the embodiment, the side wall of the shell 1 is provided with a water drain 13, and the water drain 13 is provided with a detachable plugging part.
[0070] In the embodiment, the water drain 13 is arranged at the lower end of the side wall of the shell 1, and the plugging part is a rubber plug.
[0071] In the embodiment, the constant-temperature water tank 7 is provided with a water inlet and a water outlet 14 at one side, and the water supply pipe 8 and the water return pipe 9 are respectively connected with the water inlet and the water outlet 14.
[0072] The above has described the embodiments of the utility model, the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. An experimental apparatus for a geothermal heat exchanger, characterized in that, include: The shell has a first receiving groove inside, an annular partition inside the first receiving groove, a second receiving groove inside the partition, a geological simulation layer inside the second receiving groove, and a third receiving groove inside the geological simulation layer. A U-shaped tube is provided at both ends of the U-shaped tube, which can be inserted into the third receiving groove. A first temperature sensor and a second temperature sensor are respectively provided at both ends of the U-shaped tube. A hot water circulation structure is provided, which is connected to the U-shaped pipe. A constant temperature water supply structure is provided, which is connected to the housing and is used to supply constant temperature water to the outside of the partition in the first receiving tank.
2. The experimental apparatus for the geothermal heat exchanger according to claim 1, characterized in that, The first receiving tank forms an annular constant temperature water tank on the outside of the partition, and the opposite sides of the shell are respectively provided with an inlet and an outlet that communicate with the constant temperature water tank.
3. The experimental apparatus for the geothermal heat exchanger according to claim 1, characterized in that, The geological simulation layer includes multiple rock layers.
4. The experimental apparatus for the geothermal heat exchanger according to claim 1, characterized in that, The dimensions of the third receiving tank and the U-shaped tube are obtained by scaling down the dimensions of the simulated heat exchange well and the simulated heat exchange tube by the same set ratio.
5. The experimental apparatus for the geothermal heat exchanger according to claim 1, characterized in that, The hot water circulation structure includes a first container and a second container. The first container and the second container are respectively connected to the two ends of the U-shaped pipe through a first pipe and a second pipe. A first pump is installed on the first pipe.
6. The experimental apparatus for the geothermal heat exchanger according to claim 2, characterized in that, The constant temperature water supply structure includes a constant temperature water tank, which is connected to the water inlet and the water outlet through a water supply pipe and a water return pipe, respectively, and a second pump is installed on the water supply pipe.
7. The experimental apparatus for the geothermal heat exchanger according to claim 6, characterized in that, The constant temperature water tank is equipped with a heater inside.
8. The experimental apparatus for the geothermal heat exchanger according to claim 7, characterized in that, A control unit is installed on the outside of the constant temperature water tank, and a third temperature sensor is installed inside the constant temperature water tank. The heater and the third temperature sensor are connected to the control unit.
9. The experimental apparatus for the geothermal heat exchanger according to claim 1, characterized in that, The side wall of the housing is provided with a drain outlet, and a removable sealing component is provided inside the drain outlet.
10. The experimental apparatus for the geothermal heat exchanger according to claim 6, characterized in that, The constant temperature water tank is provided with a water inlet and a water return outlet on one side, and the water inlet pipe and the water return pipe are respectively connected to the water inlet and the water return outlet.