CN116296715B - A deep high-temperature heat storage simulation system based on a five-meter-scale large-scale physical model - Google Patents
A deep high-temperature heat storage simulation system based on a five-meter-scale large-scale physical model Download PDFInfo
- Publication number
- CN116296715B CN116296715B CN202310048830.0A CN202310048830A CN116296715B CN 116296715 B CN116296715 B CN 116296715B CN 202310048830 A CN202310048830 A CN 202310048830A CN 116296715 B CN116296715 B CN 116296715B
- Authority
- CN
- China
- Prior art keywords
- meter
- temperature
- physical model
- cooling
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
- G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/364—Embedding or analogous mounting of samples using resins, epoxy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a deep high-temperature thermal storage simulation system based on a five-meter-scale large physical model, and relates to the technical field of large-scale similar physical model simulation systems. According to the invention, the 3D printing equipment is used for preparing the five-meter-level similar physical model to simulate the deep high Wen Yanti, the heating assembly is used for heating the five-meter-level similar physical model from the bottom, the highest 400 ℃ high-temperature environment with the longest heat preservation time of 6 months is provided for the five-meter-level similar physical model, the application of the ground temperature gradient of the real environment is simulated, and meanwhile, the strain, the stress and the temperature of each point in the five-meter-level similar physical model in the deep high-temperature heat storage environment are monitored in the form of the prefabricated fiber grating sensor, the high-temperature resistant temperature and the strain sensor, so that the thermal environment in a nearly real state is provided for the follow-up geothermal injection and production fracturing experiment based on the five-meter-level similar physical model.
Description
Technical Field
The invention relates to the technical field of large-scale similar physical model simulation systems, in particular to a deep thermal storage simulation system based on a five-meter-scale large-scale physical model.
Background
The geothermal energy is an important clean renewable energy source, has the characteristics of low carbon, environmental protection, stability, high efficiency and the like, is not interfered by external factors such as seasons, weather, day and night and the like compared with wind energy, solar energy and the like, and is a realistic and competitive energy source. The vast majority of geothermal resources are dry rock geothermal resources. The dry and hot rock is located in a deep environment with the underground 3-10 km and the temperature higher than 180 ℃. As a most effective means for developing dry-hot rock resources, the enhanced geothermal system is currently being widely studied for the development of enhanced geothermal energy in all countries of the world.
However, because the depth of the thermal storage of the dry hot rock is extremely deep, the field test requires a great deal of manpower and material resources which are consumed, the influencing factors are complex, the variables are difficult to control, a means of indoor test is adopted, a great deal of assumption and simplification are needed for prototyping by theoretical analysis, the problem of describing engineering dimensions by using a mathematical model is very difficult to simulate the occurrence environment of the deep dry hot rock, in contrast, a large three-dimensional physical model test based on a similar theory is developed by adopting a means of indoor test, and the geothermal injection and production test is carried out under the occurrence environment of simulating the deep dry hot rock by configuring similar materials which are similar to the thermal storage physical properties of the deep hot rock, so that the method has important guiding significance for revealing the safe and efficient exploitation and regulation modes of geothermal energy.
The device in the patent CN114526772A adopts a vertical pipe and a transverse pipe where a U-shaped shaft injection port is positioned as a heat conduction section, the whole physical model is heated in a point heating mode, the whole physical model is uniformly heated around the physical model in the patent CN110500068B and the patent CN106872668A, the device in the patent CN216669802U transmits heat to the physical model in the simulation test box through the bottom plate of the simulation test box in a mode that a heating panel is arranged below the simulation test box and is contacted with the bottom plate of the simulation test box, and the whole physical model in the simulation test box is heated in a mode that the whole physical model is substantially the same as the physical model in the patent CN110500068B and the patent CN106872668A and the whole physical model is uniformly heated around the physical model because the whole simulation test box is thermally conductive and has good thermal conductivity. None of the devices in the above patents achieve a good simulation of the increase in the ground temperature gradient in a real environment with similar physical models.
Currently, there is a great difficulty in developing a similar physical model with a meter-scale oversized scale, which means that a deep thermal storage simulation method for the similar physical model based on the meter-scale oversized scale is lacking. For this reason, in order to perform related experiments such as geothermal injection and production based on five-meter-scale large-scale similar physical models, a deep thermal storage simulation system capable of well simulating the increase of the ground temperature gradient and the maintenance of the ultra-high temperature long-time scale (400 ℃ per 6 months) state in a real occurrence environment needs to be developed. Moreover, in view of the requirement of the stress loading device for the subsequent test of the system, namely, the stress loading device applies stress conditions similar to deep high-temperature heat storage for a five-meter-level large-scale similar physical model, the system has good stress loading capacity and good heat preservation and heat insulation cooling functions, and finally, the aim of preventing damage to the whole system due to high temperature transmitted by the stress loading device is fulfilled. It should be noted that none of the prior patents achieve the above functions, and the present invention fills the gap of these functions, namely provides an advantageous research tool for complex thermal response of deep thermal storage and occurrence engineering.
Because of any great difficulty in developing the similar physical model with the ultra-large scale of the meter level, the deep high-temperature thermal storage simulation method for the similar physical model with the ultra-large scale of the meter level is less. The system in the patent provides a simulation environment similar to deep heat storage, the system performs a good simulation on the increase of the ground temperature gradient in the real environment, the device in the patent cannot realize the increase of the ground temperature gradient in the good simulation real environment of the similar physical model, and the patent does not have a heat preservation, heat insulation and cooling scheme, so that the device has great potential safety hazard in performing high-temperature experiments.
Meanwhile, in other experiments for simulating deep high-temperature thermal storage physical models, the temperature gradient increase of the simulated real environment of the similar physical models can not be realized well, and the problem that the heat preservation, heat insulation and cooling scheme is insufficient under the long-time heat preservation condition that the similar physical models with ultra-large meter scale are at the highest 400 ℃ for the longest 6 months exists.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a deep high-temperature thermal storage simulation system based on a five-meter-scale large-scale physical model.
A deep high-temperature thermal storage simulation system based on a five-meter-level large-scale physical model specifically comprises a five-meter-level similar physical model, a heating component, a thermal storage sealing layer, a cooling layer, a heat preservation and insulation layer, a temperature monitoring servo control system and a stress-strain monitoring system;
The five-meter-level similar physical model is prepared by a 3D printing mode, and is constructed by adopting a material similar to the deep high-temperature heat storage physical property, and is sequentially and closely attached to a heat storage sealing layer, a cooling layer and a heat preservation and insulation layer from inside to outside;
The heating assembly is arranged at the bottom of a five-meter-level similar physical model and comprises a plurality of layers, each layer of heating assembly comprises a heating plate and a heating rod, the heating plates are connected with the heating rod at intervals, each heating plate and the heating rod form a heating assembly, each heating assembly is connected with a temperature sensor, and the heating assemblies are independently temperature servo-controlled by adopting the temperature monitoring servo control system;
The heat storage sealing layer is subjected to full-coverage sealing by using a copper sheet material for a five-meter-level similar physical model;
The heat storage sealing layer is formed by integrally connecting thin copper sheets, the heat storage sealing layer is prefabricated on the inner side of the cooling layer in a top opening mode before the model is printed, and the top is integrally welded and sealed after the model is printed, and a sealing test is carried out.
The heat storage sealing layer is used for reserving a pipeline and a pipeline opening;
The cooling layer is positioned between the heat preservation and insulation layer and the heat storage sealing layer, the cooling layer and the heat preservation and insulation layer are tightly attached, cooling layers are uniformly distributed on six surfaces of a five-meter-level similar physical model, a plurality of cooling pipes are simultaneously arranged on the cooling layer, a cooling liquid inlet water collecting pipe and a cooling liquid outlet water collecting pipe are arranged between the cooling layer and the cooling layer, the cooling liquid inlet water collecting pipe and the cooling liquid outlet water collecting pipe are flexibly connected and are arranged at the same side and only flow through cooling liquid without bearing stress, the six cooling layers in the deep heat storage simulation system are connected in a serial connection mode, and finally, only one cooling liquid inlet manifold and one cooling liquid outlet manifold with two inlets and outlets are reserved in the model.
When the cooling layers are used for cooling, cooling liquid sequentially passes through a cooling liquid inlet, a cooling liquid inlet water collecting pipe and a cooling liquid inlet control electromagnetic valve to absorb heat, the cooling liquid is discharged outside from the cooling pipes through a cooling liquid outlet control electromagnetic valve, a cooling liquid outlet water collecting pipe and a cooling liquid outlet, the front section of the electromagnetic valve in each cooling layer is provided with a built-in electronic flowmeter, and when the flow condition of the cooling liquid in the pipes is monitored at any time, the temperature monitoring servo control system is used for independently controlling each cooling pipe so as to realize the purpose of accurately controlling the temperature gradient of the model.
The cooling layer adopts a multi-pipe design, each cooling pipe is provided with an in-out two control electromagnetic valves, each electromagnetic valve is a linear electromagnetic valve body, and the front section of each electromagnetic valve is provided with an electronic flowmeter, the heat preservation and insulation layer is made of a high-purity aluminum-containing fiber board material which is arranged in a double-layer manner, the heat preservation and insulation layers are arranged on six outermost surfaces of a five-meter-level similar physical model, and each heat preservation and insulation layer is preferably 0.25m thick and assembled in a mutually buckled manner;
The thermal insulation and heat insulation layer is arranged in a double-layer mode, one thermal insulation and heat insulation inner layer close to the sample is an aluminum silicate fiber board, the outermost layer is an aluminum oxide fiber board with a thermal insulation and heat insulation outer layer, the thermal insulation and heat insulation layer wraps the printing physical model in a three-direction buckling mode, and the thermal insulation and heat insulation layer is temporarily fixed to form the printing physical model die before printing.
When the heat preservation and insulation layer is assembled in a mutually buckling mode before 3D printing, a layer of flexible high-temperature-resistant epoxy resin is filled in an inner gap;
The temperature monitoring servo control system adopts a prefabricated fiber bragg grating sensor and a temperature sensor to monitor and transmit the temperature condition of a five-meter-level similar physical model, the fiber bragg grating sensor is arranged in the area outside the meter-level fracturing area, the high-temperature resistant temperature sensor is arranged in the meter-level fracturing area to measure the temperature, the fiber bragg grating sensor and the high-temperature resistant temperature sensor are prefabricated in a sample in a 3D printing stage and are used for monitoring the temperature in the five-meter-level large physical model, and the outer surface of the five-meter-level large physical model is monitored by adopting a mode of attaching the fiber bragg grating sensor.
The stress-strain monitoring system monitors strain-stress conditions of a physical model similar to that of a transmission five-meter level by adopting a strain sensor, and the strain sensor, the fiber bragg grating sensor and the high-temperature-resistant temperature sensor are arranged together, namely, a temperature measuring position is also a position for measuring the strain.
When the temperature monitoring servo control system monitors the temperature of the 3D printing five-meter-level similar physical model, monitoring points should be preselected before 3D printing, the monitoring points are located at a meter-level fracturing area in the five-meter-level similar physical model during 3D printing, the temperature of the monitoring points is higher than the temperature of other parts in the five-meter-level similar physical model, a high-temperature resistant temperature sensor is adopted for monitoring, and a fiber grating sensor is adopted for monitoring outside the meter-level fracturing area in the five-meter-level similar physical model.
All circuits in the deep high-temperature heat storage simulation system are connected from the top to the outside in a wiring mode of tightly attaching the heat storage sealing layer from bottom to top.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
the invention provides a deep high-temperature thermal storage simulation system based on a five-meter-scale large physical model, which has the following beneficial effects:
1. The invention is applied to the field of large-scale physical model experiments, and adopts the heating assembly which is monitored by the temperature monitoring servo control system and is independently regulated and controlled to heat and raise the temperature of the five-meter-level similar physical model in a bottom heating mode, and simultaneously, the invention is assisted with a mode of independently controlling the cooling liquid in each cooling pipe in the cooling plate to enter and exit, thereby realizing the purpose of simulating the application of the ground temperature gradient in the real environment, simultaneously well solving the problem of too low edge temperature in the heat transfer process, and providing the maximum 400 ℃ thermal environment in a nearly real state for the subsequent development of the geothermal injection and production fracturing experiment based on the five-meter-level similar physical model with the longest heat preservation duration of 6 months.
2. Because the fiber bragg grating sensor is larger than the high-temperature-resistant temperature sensor with high price, and meanwhile, the problem that the fiber bragg grating sensor is inaccurate in temperature measurement when being influenced by large strain is solved, the fiber bragg grating sensor is adopted in the area outside the meter-level fracturing area, the temperature of the five-meter-level similar physical model is precisely monitored in the whole process in the meter-level fracturing area in a mode of adopting the high-temperature-resistant temperature sensor to measure the temperature, and the problem that the experimental result is invalid due to the fact that the crack mode and trend of the crack in the five-meter-level similar physical model is influenced when the five-meter-level similar physical model-based geothermal injection fracturing experiment is subsequently developed due to the fact that the fiber bragg grating sensor is buried in the meter-level fracturing area is avoided.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a deep thermal storage simulation system based on a five-meter-scale large-scale physical model of the invention;
FIG. 2 is a cross-sectional view of the inner structure of the cooling layer of the present invention;
FIG. 3 is a block diagram of a heating assembly of the present invention;
FIG. 4 is a schematic diagram showing the overall arrangement of a temperature monitoring servo control system and a stress-strain monitoring system;
FIG. 5 is a schematic cross-sectional view of a temperature monitoring servo control system and a stress-strain monitoring system;
In the figure, five meters of similar physical models, 11, a fracturing zone, 2, a heating assembly, 21, 22 heating rods, 3, a heat storage sealing layer, 4, a cooling layer, 41, a cooling liquid inlet, 42, a cooling liquid outlet, 43, a cooling liquid inlet water collecting pipe, 44, a cooling liquid outlet water collecting pipe, 45, a cooling liquid inlet control solenoid valve, 46, a cooling liquid outlet control solenoid valve, 47, a cooling pipe, 5, a heat preservation and insulation layer, 6, a temperature monitoring servo control system, 61, a fiber grating sensor, 62, a data transmission line, 63, a high temperature resistant temperature sensor and 7, a stress-strain monitoring system.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are for
The invention is illustrated but not intended to limit the scope of the invention.
A deep high-temperature thermal storage simulation system based on a five-meter-level large-scale physical model is shown in fig. 1, and specifically comprises a five-meter-level similar physical model, a heating assembly, a thermal storage sealing layer, a cooling layer, a heat preservation and insulation layer, a temperature monitoring servo control system and a stress-strain monitoring system;
The deep high-temperature thermal storage simulation system based on the five-meter-scale large physical model provides a 400 ℃ high-temperature environment at the highest, the heat preservation time is 6 months at the highest, the sample heating rate is 5 ℃/h at the highest, and the temperature control precision is +/-0.5 ℃;
The five-meter-level similar physical model is prepared by a 3D printing mode, and a five-meter-level similar physical model is constructed by adopting a material similar to the deep high-temperature heat storage physical property, and sequentially and tightly attached to a heat storage sealing layer, a cooling layer and a heat preservation and insulation layer from inside to outside;
In the embodiment, the subsequent experiments of geothermal injection and production, hydraulic fracturing and the like are carried out in a five-meter-level similar physical model, so that an oversized meter-level fracturing area can be obtained, and the fracturing area has similar temperature and stress environment conditions in a deep high-temperature reservoir rock mass. Meanwhile, the deep thermal storage characteristic model can be printed, and besides the complete physical model, the model with the prefabricated fault structure, the model with the prefabricated smooth crack, the model with the prefabricated rough crack and the like can also be printed.
The heating component is arranged at the bottom of the five-meter-level similar physical model as shown in fig. 3, and has a plurality of layers, and the bottom heating mode is beneficial to realizing the simulation of the real deep high-temperature thermal storage and the ground temperature gradient. The heating temperature can reach 400 ℃ at most, the heating rate reaches 5 ℃ per hour at most, the temperature control precision is accurate to +/-0.5 ℃, the heating components can keep warm for a long time of 6 months at most, each layer of heating components comprises heating plates and heating rods, the heating plates are connected with the heating rods at intervals, each heating plate and each heating rod form a heating component, each heating component is connected with a temperature sensor specially used for monitoring the temperature of the heating component, and the heating components are independently controlled by adopting the temperature monitoring servo control system, so that the heating temperature can be controlled accurately. The preferred heater plate dimensions are 3m 0.1m and the heater bar dimensions are 3m 0.1m (with fin thickness). The combined heating assembly dimensions were 3m x 0.5m.
The heat storage sealing layer has good ductility by performing full-coverage sealing on a five-meter-level similar physical model by using a copper sheet material, so that the heat storage sealing layer can well transfer stress. Meanwhile, the heat storage sealing layer has good heat conductivity so as to realize rapid cooling of the five-meter-class similar physical model under the action of the cooling plate, and the preferable heat storage sealing layer is made of a thin copper sheet with the thickness of 0.3mm-1 mm. The heat storage sealing layer not only has good ductility, but also has good sealing effect;
The heat storage sealing layer is formed by integrally connecting thin copper sheets, the heat storage sealing layer is prefabricated on the inner side of the cooling layer in a top opening mode before the model is printed, and the top is integrally welded and sealed after the model is printed, and a sealing test is carried out.
The heat storage sealing layer is used for reserving a pipeline and a pipeline opening;
The cooling layer is shown in fig. 2, and is located between the heat insulation layer and the heat storage sealing layer, and is tightly attached to the heat insulation layer and the heat storage sealing layer, cooling layers are uniformly distributed on six surfaces of a five-meter-level similar physical model, a plurality of cooling pipes are simultaneously arranged on the cooling layers to increase the cooling area, the effect of rapidly transferring heat is achieved, the cooling liquid is determined according to different conditions, water or aqueous solution is adopted in a low-temperature experiment, an organic solution is adopted in a medium-temperature experiment, liquid metal is adopted in a high-temperature experiment, gas-liquid two-phase flow cooling and the like can be adopted for treatment in a special condition, a cooling liquid inlet water collecting pipe (43) and a cooling liquid outlet water collecting pipe are arranged between the cooling layer and the cooling layer, the cooling liquid inlet water collecting pipe and the cooling liquid outlet water collecting pipe are flexibly connected and are arranged at the same side, only flow through the cooling liquid without bearing stress, the six cooling layers in the deep high-temperature heat storage simulation system are connected in a serial connection mode, and finally only two cooling liquid inlet and outlet water are reserved in the model.
When the cooling layers are used for cooling, cooling liquid sequentially passes through a cooling liquid inlet, a cooling liquid inlet water collecting pipe and a cooling liquid inlet control electromagnetic valve to absorb heat, and is discharged outside from the cooling pipes through a cooling liquid outlet control electromagnetic valve, a cooling liquid outlet water collecting pipe and a cooling liquid outlet, so that the purpose of rapid cooling is realized, the front section of the electromagnetic valve in each cooling layer is provided with a built-in electronic flowmeter, and the temperature monitoring servo control system is used for independently controlling each cooling pipe and further realizing the purpose of accurately controlling the temperature gradient of a model while monitoring the flow condition of cooling liquid in the pipes at any time.
The cooling layer adopts multitube design, and every cooling tube is equipped with one and advances one and go two control solenoid valve, and the solenoid valve is linear solenoid valve body, conveniently controls the flow of coolant liquid in every cooling tube as required, is provided with electronic flowmeter at the solenoid valve anterior segment, monitors the flow condition of intraductal coolant liquid at any time, and the purpose of controlling each cooling tube alone is the temperature gradient of control model, can regard as a temperature strip with the surrounding area of every pipe, when the temperature of this temperature strip is higher than target temperature, opens the solenoid valve, carries out cooling treatment to this temperature strip, reaches target temperature, then closes the valve body when low temperature, carries out the processing of rising temperature to this strip. This operation needs to be repeated for all the temperature strips at the same time until the temperatures of all the temperature strips are within the target temperature range, i.e., the purpose of controlling the temperature gradient is achieved.
The heat preservation and insulation layer is made of high-purity aluminum-containing fiber board materials which are arranged in a double-layer mode, and the heat preservation and insulation layer is arranged on six outermost surfaces of the five-meter-level similar physical model. Each heat preservation and insulation layer is preferably 0.25m thick, and is assembled by mutually buckling. The top heat insulating layer is provided with wiring holes for the temperature monitoring servo control system and the stress-strain monitoring system at a plurality of positions except for being positioned in the holes of the subsequent experiment.
The thermal insulation and heat insulation system comprises a thermal insulation and heat insulation layer, wherein a thermal insulation and heat insulation inner layer close to a sample is an aluminum silicate fiber board, and an outermost layer is an aluminum oxide fiber board, the thermal insulation and heat insulation layer is mainly used for insulating heat of similar physical models, the protection of an external mechanical frame is mainly used for the latter, and the thermal insulation and heat insulation layer is made of flexible materials, so that a deep thermal storage simulation system based on a five-meter-level large-scale physical model is flexibly attached to a real-time Gao Wenzhen three-dimensional stress loading system, and a stress field can be well transferred. The thermal insulation layer wraps the printing physical model in a three-direction interlocking mode, and is temporarily fixed to form a printing physical model die before printing.
When the heat preservation and insulation layer is assembled in a mutually buckled mode before 3D printing, a layer of flexible high-temperature-resistant epoxy resin is filled in the gap, and the high-temperature-resistant epoxy resin still has certain bonding capacity when being deformed greatly so as to seal the gap further.
The temperature monitoring servo control system adopts a prefabricated fiber bragg grating sensor and a temperature sensor to monitor and transmit the temperature condition of a five-meter-level similar physical model, the fiber bragg grating sensor is arranged in the area outside the meter-level fracturing area, the high-temperature resistant temperature sensor is arranged in the meter-level fracturing area to measure the temperature, the fiber bragg grating sensor and the high-temperature resistant temperature sensor are prefabricated in a sample in a 3D printing stage and are used for monitoring the temperature in the five-meter-level large physical model, and the outer surface of the five-meter-level large physical model is monitored by adopting a mode of attaching the fiber bragg grating sensor. Preferably, fbg and fiber grating sensors are adopted in the area outside the meter-level fracturing area, and high-temperature resistant temperature sensors are adopted in the meter-level fracturing area. Preferably, the fiber grating sensor can resist high temperature of 400 ℃, the temperature measurement precision is 0.5 ℃, the high temperature resistant temperature sensor is a Pt temperature sensor, and the working temperature range is-40 ℃ to +1000 ℃.
The stress-strain monitoring system monitors strain-stress conditions of a physical model similar to that of a transmission five-meter level by adopting a strain sensor, and the strain sensor, the fiber bragg grating sensor and the high-temperature-resistant temperature sensor are arranged together, namely, a temperature measuring position is also a position for measuring the strain. Preferably, the strain sensor is used at a high temperature of 400 ℃ with a measurement accuracy of 0.1% FS.
FIG. 4 is a schematic diagram showing the overall arrangement of the temperature monitoring servo control system and the stress-strain monitoring system, and FIG. 5 is a schematic diagram showing the cross section of the temperature monitoring servo control system and the stress-strain monitoring system along the broken line of FIG. 4;
all circuits in the deep high-temperature heat storage simulation system are connected from the top to the outside in a wiring mode of tightly attaching the heat storage sealing layer (3) from bottom to top.
The five-meter-scale similar physical model 1 designed in this example was 4.5mx4.5mx4.5m and was prepared by 3D printing. The heat preservation and insulation layer 5 which is installed on the 6 outermost surfaces of the five-meter-level similar physical model 1 in a mutual control mode is required to be assembled before 3D printing, namely, the rest 5 surfaces which are positioned outside the top surface heat preservation and insulation layer 5 are installed in a mutual buckling mode before 3D printing, and the heat preservation and insulation layer is used as a frame of the five-meter-level similar physical model 1 during 3D printing. Before 3D printing, a heat preservation and insulation layer 5 and a cooling layer 4 with the thickness of 0.25m and a heat storage sealing layer 3 with the thickness of 0.3mm and a heating component 2 with the thickness of 3m multiplied by 0.5m can be placed at the bottom from bottom to top in an arrangement mode shown in fig. 2, and the multi-layer heating component 2 at the bottom in the printing process is tightly combined with printing materials by timely completing the installation of a heating plate 21 and a heating rod 22 according to the arrangement mode shown in fig. 3 and placing the heating component 2 at a preset position at the bottom.
In the 3D printing process, a prefabricated fiber bragg grating sensor, a temperature sensor and a strain sensor are arranged at designated positions so as to monitor temperature strain-strain later and simultaneously connect related circuits and arrange the related circuits. After 3D printing is completed, the top surface heat preservation and insulation layer 5 and 5 surfaces of the frame used as the five-meter-level similar physical model 1 in 3D printing are installed in a mutually buckled mode.
The prepared five-meter-level similar physical model 1 is heated from bottom to top by adopting the heating component 2, the temperature of each heating unit of the heating component 2 is controlled under the control of the temperature monitoring servo control system 6, and meanwhile, the flow rate of cooling liquid in each cooling pipe 47 in the cooling layer 4 is accurately controlled, so that the temperature gradient in the physical model reaches the real state of deep thermal storage as far as possible.
After the test is finished, the cooling liquid inlet control electromagnetic valve 45 and the cooling liquid outlet control electromagnetic valve 46 for controlling the circulation state of the cooling liquid in the cooling pipe 47 in the cooling layer 4 are opened first, so that the cooling liquid flows in the cooling pipe 47, and the aim of quickly cooling is achieved.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the invention. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048830.0A CN116296715B (en) | 2023-02-01 | 2023-02-01 | A deep high-temperature heat storage simulation system based on a five-meter-scale large-scale physical model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048830.0A CN116296715B (en) | 2023-02-01 | 2023-02-01 | A deep high-temperature heat storage simulation system based on a five-meter-scale large-scale physical model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116296715A CN116296715A (en) | 2023-06-23 |
| CN116296715B true CN116296715B (en) | 2025-03-18 |
Family
ID=86822999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310048830.0A Active CN116296715B (en) | 2023-02-01 | 2023-02-01 | A deep high-temperature heat storage simulation system based on a five-meter-scale large-scale physical model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116296715B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025107028A1 (en) * | 2023-11-24 | 2025-05-30 | Graphite Energy (Assets) Pty Limited | Energy storage apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655495A (en) * | 2015-02-13 | 2015-05-27 | 太原理工大学 | High temperature and high pressure coal and rock true triaxial fracturing and seepage test device and test method |
| CN111426575A (en) * | 2020-04-30 | 2020-07-17 | 东北大学 | A high temperature and high stress true triaxial test device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812022B (en) * | 2020-06-16 | 2024-04-05 | 重庆大学 | System and method for visualizing three-dimensional strain field of coal and rock under complex geological structure |
| CN213875286U (en) * | 2020-10-10 | 2021-08-03 | 武汉大学 | High-temperature crystalline rock cold shock cracking experiment system |
-
2023
- 2023-02-01 CN CN202310048830.0A patent/CN116296715B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655495A (en) * | 2015-02-13 | 2015-05-27 | 太原理工大学 | High temperature and high pressure coal and rock true triaxial fracturing and seepage test device and test method |
| CN111426575A (en) * | 2020-04-30 | 2020-07-17 | 东北大学 | A high temperature and high stress true triaxial test device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116296715A (en) | 2023-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106017965B (en) | A kind of U-shaped ground heat exchanger heat-moisture transmission performance simulating test device and test method | |
| CN107238627B (en) | Comprehensive experiment loop system for forced circulation of heat conduction oil working medium | |
| CN102721722B (en) | In-situ thermal response testing method of stratified thermal properties of underground rock and soil | |
| CN116296715B (en) | A deep high-temperature heat storage simulation system based on a five-meter-scale large-scale physical model | |
| CN101900773B (en) | Underground power cable current-carrying capacity online prediction system and method | |
| CN106275523B (en) | The rotatable infrared heating cage of venetian blind type | |
| CN107991216A (en) | Fluid fracture seepage simulator under a kind of high temperature stress | |
| CN105588774A (en) | Model test system for materials of surrounding rock and lining structures of high-ground-temperature diversion tunnel | |
| CN105911087A (en) | Large nuclear reactor molten pool natural-convection heat transfer test system and method | |
| CN104132960B (en) | Test system for simulating thermal insulation performance of pipeline under deepwater environment | |
| CN110954352B (en) | Energy underground structure model experiment test system | |
| CN205483889U (en) | High ground temperature diversion tunnel country rock, lining cutting structural model test device | |
| CN104200853B (en) | A kind of slice type liquid heavy metal natural circulating device | |
| CN115655769A (en) | Heat exchange experiment system and experiment method for middle-deep layer double-pipe heat exchanger | |
| CN103175732A (en) | Test bed for simulating thermal fatigue phenomenon of nuclear power station pipeline | |
| CN204594914U (en) | Groove type solar heat collecting pipe heat waste loses test macro | |
| CN107271256B (en) | A Simulated Temperature Gradient Field and Automatic Loading Device and Its Application Method | |
| CN111505239A (en) | A water-thermal-mechanical coupling model test box | |
| CN117434246A (en) | Device and method for simulating influences of dry-hot rock fracturing, fracturing storage and heat extraction on reservoir cracks | |
| CN206982964U (en) | A kind of system of curing concrete prefabricated component | |
| CN116296248A (en) | Test device for simulating low-temperature-wave coupling effect under polar region marine environment | |
| Xue et al. | Thermal performance assessment and optimization simulation of large-scale molten salt storage tanks and foundation | |
| CN115808385A (en) | A concrete curing device under high temperature corrosion environment | |
| CN210051713U (en) | An experimental system for testing the heat transfer performance of energy piles | |
| CN209311298U (en) | A centrifuge experimental device suitable for roadbeds in cold regions that have been in service for many years |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |