A granary energy pile test platform and test operation method thereof

Abstract

The present invention discloses a granary energy pile test platform and a test operation method thereof; the test platform includes a temperature control and heat insulation system, an energy pile model, a granary model, a raft model, an energy conversion system, and a thermal and mechanical monitoring and control system; the temperature control and heat insulation system includes an upper temperature control and heat insulation box and a lower temperature control and heat insulation box that are superimposed, the granary model is arranged in the upper temperature control and heat insulation box, the energy pile model is arranged in the lower temperature control and heat insulation box, the raft model is arranged between the energy pile model and the granary model, and the energy pile model and the granary model are respectively connected to the energy conversion system; the thermal and mechanical monitoring and control system are respectively used to monitor the temperature control and heat insulation system, the energy pile model, the granary model, and the energy conversion system. The present invention is based on the test operation method of the above test platform, and achieves the purpose of using the test platform to simulate the operation of the granary, thereby studying the thermodynamic changes during the system cycle.

Description

Technical Field

[0001] The invention relates to the field of thermodynamic property testing of grains, and in particular to a granary energy pile test platform and a test operation method thereof. Background Art

[0002] China is a major grain producer. Food security is related to the national economy and people's livelihood. As people's living standards continue to improve, the requirements for food quality are also gradually increasing. During the storage process, grain will produce problems such as high temperature, mildew, and insect pests. The traditional method uses artificial refrigeration and fumigation to prevent and control these problems. This causes a large amount of energy to be consumed during the storage of grain, which is contrary to my country's green development concept. Therefore, seeking an alternative clean energy has become an urgent problem that needs to be solved.

[0003] As a clean energy with wide distribution, large reserves and renewable energy, geothermal energy has great potential for development and utilization. Energy pile technology is to turn the building pile foundation into a part of the ground source heat pump system, bury the heat exchange pipe in the pile foundation, and realize the circulation of geothermal heat through the pump. At present, energy piles are also used in general buildings, and many scholars have never stopped studying the thermal response of energy piles. The combination of energy pile technology and modern granaries is a new way of storing grain. However, the influence of ambient temperature and other factors will have a certain impact on the heat exchange efficiency between the granary and the energy pile, which restricts the combination of energy piles and granaries. Therefore, it is urgent to study the influence of ambient temperature on the heat exchange efficiency between the granary and the energy pile to provide a theoretical basis for granary design and green grain storage. Summary of the invention

[0004] The purpose of the present invention is to provide a granary energy pile test platform and a test operation method thereof to solve the problems existing in the above-mentioned prior art. By simulating the thermal cycle of energy piles and granaries at different temperatures, the heat exchange capacity of energy piles under different working conditions can be studied, thereby providing a test research platform for the application of energy piles in the warehousing field.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The invention provides a granary energy pile test platform, comprising a temperature control and heat insulation system, an energy pile model, a granary model, a raft model, an energy conversion system and a thermal and mechanical monitoring and control system; the temperature control and heat insulation system comprises an upper temperature control and heat insulation box and a lower temperature control and heat insulation box which are superimposed, the granary model is arranged in the upper temperature control and heat insulation box, the energy pile model is arranged in the lower temperature control and heat insulation box, the raft model is arranged between the energy pile model and the granary model, and the energy pile model and the granary model are respectively connected to the energy conversion system; the thermal and mechanical monitoring and control system are respectively used for monitoring the temperature control and heat insulation system, the energy pile model, the granary model and the energy conversion system.

[0007] Optionally, the upper temperature-controlled insulation box and the lower temperature-controlled insulation box have the same structure, both comprising an organic glass layer, a heating plate attached to the outside of the organic glass layer, and a thermal insulation material layer provided between the organic glass layer and the heating plate.

[0008] Optionally, the thermal and mechanical monitoring and control system includes a temperature sensor, a data collector and a temperature controller; the temperature sensors are evenly arranged in the temperature control and insulation system, the data collector and the temperature controller are respectively arranged on the energy conversion system, and the temperature controller is connected to the heating plate; the temperature sensor and the temperature controller are respectively connected to the data collector.

[0009] Optionally, the energy pile model includes a filler uniformly filled in the lower temperature-controlled insulation box, a plurality of energy piles are inserted in the filler, and a plurality of temperature sensors are uniformly inserted in the filler.

[0010] Optionally, the energy pile includes a concrete column cast by a pipe mold, a steel cage is arranged in the concrete column, a U-shaped heat exchange tube is bound in the steel cage, and three vibrating wire strain gauges are connected to the heat exchange tube in sequence from top to bottom, and the heat exchange tube and the vibrating wire strain gauge are both located in the concrete column; an earth pressure box is placed at the bottom of the energy pile.

[0011] Optionally, the granary model includes a granary, the granary includes a granary wall with a circular cross-section, a conical silo roof is arranged on the top of the silo wall, and a ring-shaped handle is arranged on the upper part of the silo roof; a plurality of temperature and humidity sensors are evenly arranged on the silo wall from top to bottom, and the temperature and humidity sensors are connected to the data collector; a ventilation hole is opened above and below the silo wall; and a ground cage with a cross-shaped structure is arranged at the bottom of the granary.

[0012] Optionally, the raft model includes a raft foundation and an energy pile installation groove; the raft foundation is connected to the bottom of the granary; the energy pile installation groove is provided on the raft foundation, and the energy pile installation groove is connected to the top of the energy pile.

[0013] Optionally, the energy conversion system includes a refrigerator, and a heat exchange tube water outlet and a heat exchange tube water inlet are provided on the top of the heat exchange tube, and the refrigerator includes a refrigerator water inlet and a refrigerator water outlet; the heat exchange tube water outlet is connected to the refrigerator water inlet through a water pipe, and the heat exchange tube water inlet is connected to the refrigerator water outlet; the refrigerator is connected to a first ventilation pipe and a second ventilation pipe, the first ventilation pipe is connected to the ventilation hole above the warehouse wall, and the second ventilation hole passes through the ventilation hole below the warehouse wall and is connected to the ground cage; the data collector is arranged on the refrigerator, and the data collector is connected to an electronic computer for temperature and humidity monitoring and data storage.

[0014] The present invention also provides a test operation method of a granary energy pile test platform, comprising the following steps:

[0015] Step 1: Prefabrication of energy piles: vibrating wire strain gauges with temperature measurement function are arranged at the top, middle and bottom of the energy pile steel cage; pipes are used to support the steel cage; concrete is poured and the formwork is removed after 28 days of standard curing;

[0016] Step 2: Before the test begins, exhaust the gas in the instrument and pipelines, adjust the flow rate to the maximum through the refrigerator water pump, and exhaust the air in the instrument and pipelines after circulating for 1 to 2 minutes;

[0017] Step 3: Open the top cover of the lower temperature control and insulation system, place the earth pressure box under the energy pile, and place the filler in layers; connect the raft foundation with the energy pile; open the top cover of the upper temperature control and insulation system, take out the granary top cover by the handle, put in the sample required for the test, and then change the two top covers to ensure its air tightness;

[0018] Step 4: Turn on the temperature controller of the upper temperature-controlled insulation box and the temperature controller of the lower temperature-controlled insulation box; the temperature sensor monitors the air temperature outside the granary in the upper temperature-controlled insulation box and the temperature of the filler around the pile; the regulation between the temperature sensor and the temperature controller controls the air and soil at the temperature required for the test;

[0019] Step 5: Turn on the refrigerator to circulate the water in the heat exchange tubes in the energy pile through the pump in the refrigerator; the refrigerator converts the low-temperature water into low-temperature air, which is transmitted to the ground cages arranged at the upper and lower vents of the granary through the ventilation pipe;

[0020] Step six, through the temperature and humidity sensors arranged in the granary, the vibrating wire strain gauge in the energy pile, the earth pressure box, and the temperature sensors inside the granary and around the pile, the changes in temperature, humidity, stress and deformation at various locations in the granary are monitored in real time, and the real-time data is collected by the data acquisition device and transmitted to the computer, and the collected data is organized and stored by the computer.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The present invention can controllably adjust the temperature of the granary interior and the filler around the piles, which is in line with the actual grain storage environment. The heat exchange flow rate, heat exchange tube diameter and other working conditions can be adjusted to provide more data for the test. An energy pile installation groove is set under the raft foundation, and the number of energy piles and ordinary piles can be controllably set. The energy pile bearing capacity and heat exchange efficiency under different energy pile usage ratios can be studied. The fully automatic data acquisition system based on the system module is adopted, and data reading and analysis are more accurate and convenient than manual reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a structural schematic diagram of the granary energy pile test platform of the present invention;

[0025] Figure 2 This is a schematic diagram of the energy pile structure of the present invention;

[0026] Figure 3 It is a partial cross-sectional structural schematic diagram of the temperature control and heat insulation system of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the refrigerator of the present invention;

[0028] Figure 5 It is a top view schematic diagram of the raft model structure of the present invention;

[0029] Figure 6 It is a schematic side view of the raft model structure of the present invention;

[0030] Description of the accompanying drawings: Granary energy pile test platform 100; upper temperature-controlled insulation box 1-1; lower temperature-controlled insulation box 1-2; temperature sensor 1-3; temperature controller 1-4; insulation material layer 1-5; heating plate 1-6; data collector 1-7; energy pile 2-1; filler 2-2; earth pressure box 2-3; steel cage 2-4; vibrating wire strain gauge 2-5; heat exchange tube 2-6; PVC pipe 2-7; concrete 2-8; granary 3-1; vent 3-2; ventilation pipe 3-21; ventilation pipe 3-22; temperature and humidity sensor 3-3; warehouse roof 3-4; ring handle 3-5; warehouse wall 3-6; ground cage 3-7; raft foundation 4-1; energy pile installation groove 4-2; small refrigerator 5-1; water pipe 5-2; heat exchange pipe water outlet 5-3; refrigerator water inlet 5-4; refrigerator water outlet 5-5; heat exchange pipe water inlet 5-6; electronic computer 6-1. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a granary energy pile test platform and a test operation method thereof to solve the problems existing in the above-mentioned prior art. By simulating the thermal cycle of energy piles and granaries at different temperatures, the heat exchange capacity of energy piles under different working conditions can be studied, thereby providing a test research platform for the application of energy piles in the warehousing field.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-Figure 6 As shown, the present invention provides a granary energy pile test platform 100, including a temperature control and insulation system, an energy pile model, a granary model, a raft model, an energy conversion system, and a thermal and mechanical monitoring and control system.

[0035] Specifically, the temperature control and insulation system includes an upper temperature control and insulation box 1-1, a lower temperature control and insulation box 1-2, a temperature sensor 1-3, a temperature controller 1-4 and a thermal insulation material layer 1-5; the upper temperature control and insulation box 1-1 and the lower temperature control and insulation box 1-2 are made of plexiglass, and the tops of the upper temperature control and insulation box 1-1 and the lower temperature control and insulation box 1-2 can be opened; a temperature controller 1-4 is arranged in the upper temperature control and insulation box 1-1, and the temperature controller 1-4 is connected to the data acquisition device 1-7; heating plates 1-6 are attached to the outside of the upper and lower temperature control and insulation boxes, and are respectively connected to the corresponding temperature controllers 1-4; a thermal insulation material layer 1-5 is wrapped around the temperature control and insulation boxes.

[0036] The energy pile model includes an energy pile 2-1, a filler 2-2, a temperature sensor 1-3, an earth pressure box 2-3, a steel cage 2-4, a vibrating wire strain gauge 2-5, a heat exchange tube 2-6, a PVC pipe 2-7, and concrete 2-8. The heat exchange tube 2-6 is bound to the steel cage 2-4 of the energy pile, and vibrating-wire strain gauges 2-5 with temperature measurement function are arranged at the upper, middle and lower parts respectively; the steel cage 2-4 is supported by a PVC pipe 2-7; and concrete 2-8 of standard grade is poured, and the formwork is removed after 28 days of standard curing; the energy pile 2-1 is placed in the lower temperature-controlled insulation box 1-2, and the remaining space is filled with filler 2-2; three temperature sensors 1-3 are placed in the soil at a distance of A mm, B mm, C mm from the soil surface and at a distance of 1D, 2D, and 3D (D is the pile diameter) from the pile axis of the side pile; two temperature sensors 1-3 are placed in the soil at a distance of A mm, B mm, C mm from the soil surface and at a distance of 1D and 2D (D is the pile diameter) from the two pile axes of the middle pile; an earth pressure box 2-3 is placed at the bottom of each energy pile.

[0037] The granary model includes a granary 3-1, a vent 3-2, and a temperature and humidity sensor 3-3. The granary model is placed in the upper temperature-controlled insulation box 1-1; the granary roof 3-4 is conical, and the granary roof 3-4 is provided with a ring handle 3-5, which is located above the granary wall 3-6; the granary wall 3-6 has a circular cross section, and temperature and humidity sensors 3-3 are arranged at the upper, middle and lower parts of the granary wall, and the temperature and humidity sensors 3-3 are connected to the data collector 1-7; the vents 3-2 are arranged at the upper and bottom positions of the granary wall 3-6 respectively; a ground cage 3-7 with a cross-shaped structure is arranged at the bottom of the granary 3-1.

[0038] The raft model includes a raft foundation 4-1 and an energy pile installation groove 4-2. The raft foundation 4-1 is connected to the granary 3-1; the raft foundation 4-1 is provided with an energy pile installation groove 4-2 and is connected to the energy pile.

[0039] The energy conversion system includes an energy pile heat exchange pipe 2-6, a ventilation pipe 3-2, a ground cage 3-7, a refrigerator, and a water pipe 5-2. The refrigerator adopts a small refrigerator 5-1. The water pipe 5-2 is used to connect the heat exchange pipe outlet 5-3 with the refrigerator water inlet 5-4; the refrigerator water outlet 5-5 is connected to the heat exchange pipe water inlet 5-6; the refrigerator ventilation pipe is divided into two parts: ventilation pipe 3-21 and ventilation pipe 3-22. Ventilation pipe 3-21 is connected to the ventilation port 3-2 above the silo wall, and ventilation pipe 3-22 is connected to the ground cage 3-7 through the lower ventilation port 3-2 of the silo. The built-in water pump of the refrigerator is connected to the heat exchange pipe outlet of the energy pile to send cold water into the refrigerator. Using the physical property that water vapor will absorb the surrounding heat during evaporation, a cooling water curtain, also known as a wet curtain, is installed at the air inlet channel of the refrigerator. When air passes through the wet curtain, heat is absorbed and the air temperature is reduced by 5 to 8°C. The air with lowered temperature is sent into the granary through the air supply duct of the water-cooled air conditioner and the ventilation pipe to reduce the temperature inside the granary. Since the air passing through the water-cooled air conditioner contains a large amount of water vapor, it will evaporate again, further reducing the temperature, which can be reduced by more than 10°C in dry areas. The water temperature will rise after heat exchange with the air. At this time, the higher temperature water is sent to the energy pile through the water inlet of the heat exchange pipe, and the high temperature water temperature is reduced by its stable low temperature environment. The reduced water can enter the refrigerator through the water pump. In this way, a circulation loop of cold and hot energy exchange is formed.

[0040] The temperature monitoring system includes a temperature and humidity sensor 3-3, a data collector 1-7, and an electronic computer 6-1 for temperature and humidity monitoring and data storage. Vibrating-wire strain gauges 2-5 with temperature measurement functions are arranged at the upper, middle, and lower parts of the energy pile; three temperature sensors 1-3 are arranged in the soil of the side piles at A mm, B mm, and C mm from the soil surface and at a distance of 1D, 2D, and 3D (D is the pile diameter) from the pile axis; two temperature sensors 1-3 are arranged in the soil of the middle pile at A mm, B mm, and C mm from the soil surface and at a distance of 1D and 2D (D is the pile diameter) from the two pile axes; and an earth pressure box 2-3 is placed at the bottom of each energy pile.

[0041] The present invention also provides a test operation method of a granary energy pile test platform, and the specific steps are as follows:

[0042] Step 1, prefabrication of energy pile 2-1: vibrating-wire strain gauges 2-5 with temperature measurement function are arranged at the upper, middle and lower parts of the energy pile steel cage 2-4; PVC pipes 2-7 are used to support the steel cage 2-4; and standard grade concrete 2-8 is poured, and the mold is removed after standard curing for 28 days; during the filling process, a temperature sensor 1-3 is placed in a temperature-controlled insulation box; vibrating-wire strain gauges 2-5 with temperature measurement function are arranged at the upper, middle and lower parts of the energy pile.

[0043] Step 2: Before the test begins, the gas in the instrument and pipeline should be discharged first. The flow rate should be adjusted to the maximum through the small refrigerator 5-1 water pump. After circulating for 1 to 2 minutes, the air in the instrument and pipeline should be discharged.

[0044] Step three, open the top cover of the lower temperature control and insulation system, place the earth pressure box 2-3 under the energy pile, and place the filler 2-2 in layers; connect the raft foundation 4-1 with the energy pile 2-1; open the top cover of the upper temperature control and insulation system, take out the granary top cover through the handle 3-5, put in the sample 3-8 required for the test, and after putting in, change the two top covers to ensure their air tightness.

[0045] Step four, turn on the temperature controller 1-4 of the upper temperature-controlled insulation box 1-1 and the temperature controller 1-4 of the lower temperature-controlled insulation box 1-2; the temperature sensor 1-3 monitors the air temperature outside the granary 3-1 in the upper temperature-controlled insulation box 1-1 and the temperature of the filler 2-2 around the pile; the regulation between the temperature sensor 1-3 and the temperature controller 1-4 controls the air and soil at the temperature required for the test.

[0046] Step 5, turn on the small refrigerator 5-1. The pump in the small refrigerator 5-1 realizes the circulation of water in each heat exchange tube 2-6 in the energy pile 2-1. The pump extracts the water with lower temperature in the energy pile 2-1 into the small refrigerator 5-1, and the small refrigerator 5-1 converts the low-temperature water into low-temperature air, which is transmitted to the ground cage 3-7 arranged at the upper ventilation port 3-2 and the lower ventilation port 3-2 of the granary through the ventilation pipe 3-2.

[0047] Step 6: Monitor the changes of temperature, humidity, stress and deformation at each position in the granary 3-1 in real time through the temperature and humidity sensor 3-3 arranged in the granary 3-1, the vibrating wire strain gauge 2-5 in the energy pile, the earth pressure box 2-3, and the temperature sensor 1-3 inside the granary and around the pile. Use the data collector 1-7 to collect the real-time data and transmit it to the computer 6-1, and use the computer 6-1 to organize and store the collected data. Through the analysis of the real-time test data, the temperature distribution of the granary 3-1, the temperature stress and heat exchange capacity of the energy pile 2-1 can be obtained, and further research can be carried out.

[0048] Feasibility analysis:

[0049] Assume that the bottom diameter of the granary is 1.20m and the height is 2.10m. The grain is wheat (the bulk density of wheat is 750kg / m 3 , specific heat capacity is 1780J / kg.K), the initial temperature in the granary is 40℃, and the internal temperature of the granary is reduced to 20℃ through the energy pile device.

[0050] m1=ρ1c1=750*π / 4*1.2*1.2*2.1=1781.28kg………………(1)

[0051] Q1=c1m1ΔT1=1780*1781.28*(40-20)=6.34*10 7 J / kg.K………(2)

[0052] The small refrigerator transfers the temperature in the granary to the energy pile through the compressor. The energy pile absorbs the heat, the water temperature drops, and the refrigerator blows cold air into the granary. The water flow rate q is controlled at 0.6m 3 / h, the heat exchange medium is water (the bulk density of water is 1000kg / m 3 , specific heat capacity is 4200J / kg.K), the energy pile rises from 15℃ to 25℃. That is:

[0053] m2=q*t*ρ2=0.6*1000t=600tkg………………(3)

[0054] Q2=c2m2ΔT2=4200*600t*(25-15)=2.52*10 7 t………………(4)

[0055] From (2) and (4), we can get the time t from the initial temperature of the granary to the target temperature:

[0056] Q1=Q2………………………………(5)

[0057]

[0058] Taking into account the heat loss problem, the time is taken as 3h.

[0059] In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0060] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A granary energy pile test platform, characterized by: It includes a temperature control and heat insulation system, an energy pile model, a granary model, a raft model, an energy conversion system and a thermal and mechanical monitoring and control system; the temperature control and heat insulation system includes an upper temperature control and heat insulation box and a lower temperature control and heat insulation box which are stacked, the granary model is arranged in the upper temperature control and heat insulation box, the energy pile model is arranged in the lower temperature control and heat insulation box, the raft model is arranged between the energy pile model and the granary model, and the energy pile model and the granary model are respectively connected to the energy conversion system; the thermal and mechanical monitoring and control system includes a temperature sensor, a data collector and a temperature controller, and the thermal and mechanical monitoring and control system are respectively used to monitor the temperature control and heat insulation system, the energy pile model, the granary model and the energy conversion system; the energy pile model includes a filler uniformly filled in the lower temperature control and heat insulation box, a plurality of energy piles are inserted in the filler, and a plurality of temperature sensors are uniformly inserted in the filler; the energy conversion system includes a refrigerator, and a cooling water curtain is installed at the air inlet channel of the refrigerator.

2. The granary energy pile test platform according to claim 1 is characterized by: The upper temperature-controlled heat-insulating box and the lower temperature-controlled heat-insulating box have the same structure, both comprising an organic glass layer, a heating plate attached to the outside of the organic glass layer, and a heat-insulating material layer arranged between the organic glass layer and the heating plate.

3. The granary energy pile test platform according to claim 2 is characterized by: The temperature sensors are evenly arranged in the temperature control and insulation system, the data collector and the temperature controller are respectively arranged on the energy conversion system, and the temperature controller is connected to the heating plate; the temperature sensors and the temperature controller are respectively connected to the data collector.

4. The granary energy pile test platform according to claim 1 is characterized by: The energy pile includes a concrete column cast by a pipe mold, a steel cage is arranged in the concrete column, a U-shaped heat exchange tube is bound in the steel cage, and three vibrating wire strain gauges are connected to the heat exchange tube in sequence from top to bottom. The heat exchange tube and the vibrating wire strain gauge are both located in the concrete column; an earth pressure box is placed at the bottom of the energy pile.

5. The granary energy pile test platform according to claim 4 is characterized by: The granary model includes a granary, and the granary includes a granary wall with a circular cross-section, a conical granary roof is arranged on the top of the granary wall, and a ring-shaped handle is arranged on the upper part of the granary roof; a plurality of temperature and humidity sensors are evenly arranged on the granary wall from top to bottom, and the temperature and humidity sensors are connected to the data collector; a ventilation hole is opened above and below the granary wall; and a ground cage with a cross-shaped structure is arranged at the bottom of the granary.

6. The granary energy pile test platform according to claim 5 is characterized by: The raft model includes a raft foundation and an energy pile installation groove; the raft foundation is connected to the bottom of the granary; the energy pile installation groove is provided on the raft foundation, and the energy pile installation groove is connected to the top of the energy pile.

7. The granary energy pile test platform according to claim 6 is characterized by: A heat exchange tube water outlet and a heat exchange tube water inlet are provided on the top of the heat exchange tube, and the refrigerator includes a refrigerator water inlet and a refrigerator water outlet; the heat exchange tube water outlet is connected to the refrigerator water inlet through a water pipe, and the heat exchange tube water inlet is connected to the refrigerator water outlet; the refrigerator is connected to a first ventilation pipe and a second ventilation pipe, the first ventilation pipe is connected to the ventilation hole above the warehouse wall, and the second ventilation pipe is connected to the ground cage after passing through the ventilation hole below the warehouse wall; the data collector is arranged on the refrigerator, and the data collector is connected to an electronic computer for temperature and humidity monitoring and data storage.

8. A test operation method of the granary energy pile test platform according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: Prefabrication of energy piles: vibrating wire strain gauges with temperature measurement function are arranged at the top, middle and bottom of the energy pile steel cage; pipes are used to support the steel cage; concrete is poured and the formwork is removed after 28 days of standard curing; Step 2: Before the test begins, exhaust the gas in the instrument and pipelines, adjust the flow rate to the maximum through the refrigerator water pump, and exhaust the air in the instrument and pipelines after circulating for 1 to 2 minutes; Step 3: Open the top cover of the lower temperature control and insulation system, place the earth pressure box under the energy pile, and place the filler in layers; connect the raft foundation with the energy pile; open the top cover of the upper temperature control and insulation system, take out the granary top cover by the handle, put in the sample required for the test, and then change the two top covers to ensure its air tightness; Step 4: Turn on the temperature controller of the upper temperature-controlled insulation box and the temperature controller of the lower temperature-controlled insulation box; the temperature sensor monitors the air temperature outside the granary in the upper temperature-controlled insulation box and the temperature of the filler around the pile; the regulation between the temperature sensor and the temperature controller controls the air and soil at the temperature required for the test; Step 5: Turn on the refrigerator to circulate the water in the heat exchange tubes in the energy pile through the pump in the refrigerator; the refrigerator converts the low-temperature water into low-temperature air, which is transmitted to the ground cages arranged at the upper and lower vents of the granary through the ventilation pipe; Step six, through the temperature and humidity sensors arranged in the granary, the vibrating wire strain gauge in the energy pile, the earth pressure box, and the temperature sensors inside the granary and around the pile, the changes in temperature, humidity, stress and deformation at various locations in the granary are monitored in real time, and the real-time data is collected by the data acquisition device and transmitted to the computer, and the collected data is organized and stored by the computer.

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