High-thermal-conductivity energy pile and manufacturing method thereof

Abstract

The invention relates to the technical field of civil construction engineering, in particular to effective utilization of geothermal resources and improvement of an energy exchange system. According to the energy pile, dynamic regulation and control of stratum heat balance are achieved through the active heat management technology, and the influence of heat accumulation on sustainable utilization of geothermal resources is effectively prevented; a composite heat extraction structure is adopted, and the heat absorption efficiency of geothermal resources is remarkably improved; a high-thermal-conductivity energy pile comprises a fixed base body, and a water circulation assembly is embedded in the fixed base body. The water circulation assembly comprises a water pumping assembly, a circulation pipeline and a water conveying assembly which are communicated with one another; a heat absorption device is arranged on the outer side of the fixed base body and comprises a plurality of heat absorption columns which are vertically distributed; the heat absorption column is provided with a heat conduction head embedded into the fixed base body.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, in particular to the effective utilization of geothermal resources and the improvement of energy exchange systems. Background Art

[0002] Geothermal resources are a kind of clean energy, which are widely distributed, low in cost and convenient to use, and have broad development and application prospects. The ground source heat pump technology is an efficient energy-saving and environmental-friendly air-conditioning system that uses shallow geothermal resources underground for heating and cooling. It uses soil, groundwater or surface water as the cold and heat sources, and realizes the transfer of energy from the low-temperature heat source to the high-temperature heat source by inputting a small amount of high-grade energy.

[0003] The Chinese patent document with the publication number CN102808405B discloses a PCC energy pile and its manufacturing method. The above device is composed of a cavity PCC pile, a heat-conducting liquid, a cover plate, a bottom plate, heat-conducting pipes and an inspection channel. The manufacturing method includes constructing the PCC pile, excavating the pile core soil, installing the bottom plate and the cover plate, arranging the heat-conducting pipes and forming a circulation loop, and realizing geothermal energy extraction by means of the heat exchange between the side area of the pile body and the internal heat-conducting liquid.

[0004] However, the above device relies on a passive heat conduction mechanism and only realizes geothermal extraction through the natural heat exchange between the side wall of the pile body and the internal heat-conducting liquid. This technical solution has the following problems: First, it lacks an active heat accumulation management function, and local overheating of the formation is likely to occur during long-term operation, destroying the heat balance. Long-term heat accumulation will destroy the cold and heat balance of the formation, affect the sustainable utilization of geothermal resources, and the heat accumulation will cause the temperature of the soil and groundwater to rise, affecting the living environment of microorganisms in the soil and the growth of vegetation; Second, the heat absorption efficiency is limited. Only relying on a single-stage heat collection mode, it is impossible to effectively extract geothermal resources, and the heat absorption area is insufficient. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-conductivity energy pile and its manufacturing method. The energy pile realizes the dynamic regulation of the formation heat balance through active heat management technology, effectively preventing the impact of heat accumulation on the sustainable utilization of geothermal resources; adopting a composite heat extraction structure, significantly improving the heat absorption efficiency of geothermal resources.

[0006] The present invention is achieved through the following technical solutions: In the first part, a high-conductivity energy pile includes a fixed matrix, in which a water circulation component is buried; the water circulation component includes a pumping component, a circulation pipeline and a water delivery component that are connected and communicated; a heat absorption device is arranged outside the fixed matrix, and the heat absorption device includes a plurality of heat absorption columns vertically distributed; a heat conduction head embedded in the fixed matrix is arranged at the upper end of the heat absorption column.

[0007] The high thermal conductivity energy pile adopts a composite structure of "internal heat circulation + external network heat absorption". Its core consists of a fixed matrix formed by pouring, with a water circulation component arranged inside it and a heat absorption device arranged outside it. The heat absorption device is composed of a plurality of vertically distributed heat absorption columns. The top of each heat absorption column is embedded into the interior of the fixed matrix through a heat conduction head, forming a heat conduction bridge.

[0008] During the operation of the energy pile, low-temperature circulating water flows inside the fixed matrix through the water circulation component, and heat exchange is carried out with the heat absorption device through the heat conduction head. The heat absorption device directly absorbs and stores the heat in the formation. The stored heat is transferred to the inside of the fixed matrix through the heat conduction head. At the same time, the water circulation device absorbs the heat accumulated inside the fixed matrix, and the pumping component pumps out the water source heated due to the heat accumulation phenomenon, and then conveys cold water through the water conveyance component in the circulation pipeline, taking the heat out of the formation to avoid local heat accumulation in the formation. Moreover, the extracted hot water can be used in daily life or industrial production processes.

[0009] The heat absorption columns in the heat absorption device are provided with heat conduction heads embedded in the fixed matrix, and the heat conduction heads are usually made of high thermal conductivity materials. When there is heat around, such as geothermal heat in the formation soil, the multiple heat absorption columns are like multiple independent heat collectors, distributed at different positions outside the fixed matrix, and can capture the surrounding heat in all directions. The heat absorbed by the heat absorption columns is quickly transferred to the inside of the fixed matrix through the heat conduction heads and absorbed by the cold water in the water circulation pipeline. This direct heat conduction method reduces the loss in the heat transfer process, enabling the heat to be quickly transferred from the external environment to the circulating water and avoiding heat accumulation.

[0010] The heat absorption device includes multiple heat absorption columns and the ends of the heat absorption columns are provided with heat conduction heads embedded in the fixed matrix. This design can effectively achieve the effect of high thermal conductivity. The setting of multiple heat absorption columns greatly increases the heat exchange area in the formation. Moreover, each heat absorption column is distributed at different positions and can capture heat in all directions, significantly improving the heat absorption efficiency of geothermal resources.

[0011] The heat conduction heads at the ends of the heat absorption columns are embedded in the fixed matrix, ensuring the high efficiency of heat transfer. When the surrounding environmental temperature is too high, heat is released through the heat conduction heads, and then the released heat is absorbed by the water circulation device, jointly regulating the formation temperature and effectively preventing the impact of heat accumulation on the sustainable utilization of geothermal resources.

[0012] Through the continuous absorption of heat by the cold water in the water circulation device and taking away the heat accumulated by heat, the functions of high-efficiency heat dissipation and heat collection of the high thermal conductivity energy pile are realized, achieving a high thermal conductivity effect. The extracted hot water can be used in daily life or industrial production processes, realizing the secondary utilization of energy and further improving the comprehensive utilization efficiency of energy.

[0013] Preferably, the outer surface of the heat absorption column is provided with a wavy heat absorption layer, and a phase change energy storage layer is provided inside the wavy heat absorption layer.

[0014] The wavy heat absorption layer is designed on the outer surface of the heat absorption column, increasing the contact area with the formation soil; a phase change energy storage layer is provided inside the wavy heat absorption layer, and the characteristics of the energy storage material filled in the phase change energy storage layer are used to absorb and release heat.

[0015] The wavy structure improves the heat absorption per unit area. The phase change energy storage layer realizes heat storage. During periods of sufficient energy supply or low demand, the phase change energy storage layer is used to absorb and store excess energy to avoid energy waste. During peak energy demand or insufficient supply periods, the phase change energy storage layer releases the stored energy to meet the demand, reducing dependence on external energy sources. It enables the energy pile to maintain thermal stability during day-night temperature differences or seasonal changes and extends the effective heating time.

[0016] Preferably, the length of the heat absorption column is greater than the length of the fixed matrix.

[0017] The length of the heat absorption column exceeds the length of the fixed matrix, expanding the heat exchange range; it enables the heat absorption column to penetrate deeper into the soil where the geothermal temperature is more stable, facilitating the energy pile to absorb heat from the deep formation and reducing the influence of surface temperature fluctuations on heat exchange.

[0018] The temperature fluctuation of the deep soil is small. Compared with the design of a short column, the length of the heat absorption column being greater than the length of the fixed matrix is conducive to improving the heat source stability of the energy pile.

[0019] Preferably, a heat conduction wire connected to the heat conduction head is buried in the phase change energy storage layer.

[0020] The heat conduction wire penetrates through the phase change energy storage layer and is connected to the heat conduction head at one end, forming a fast heat conduction channel of "heat absorption column → heat conduction head → fixed matrix → water circulation" to accelerate heat transfer.

[0021] The heat conduction wire promotes the rapid conduction of heat inside the phase change material to the heat conduction head, avoiding local overheating or overcooling. It shortens the heat transfer path and improves the dynamic response efficiency of the entire device.

[0022] Preferably, the upper layer of the phase change energy storage layer along the vertical direction of the heat absorption column is a high-temperature phase change layer, and the lower layer is a low-temperature phase change layer.

[0023] The upper layer of the heat absorption column is a high-temperature phase change layer filled with a high-temperature phase change energy storage material, and the lower layer is a low-temperature phase change layer filled with a low-temperature phase change energy storage material, matching the temperature gradient of the soil at different depths. The upper high-temperature phase change layer adapts to the high-temperature environment, and the lower low-temperature phase change layer adapts to the low-temperature environment, improving the energy storage efficiency of the heat absorption device. It reduces the performance degradation of the energy storage material in the phase change energy storage layer caused by frequent phase changes.

[0024] Preferably, the circulation pipeline includes a central heat conduction pipe, a top annular shunt pipe and a bottom annular shunt pipe connected to the central heat conduction pipe, and a cold and heat exchange pipe is connected between the top annular shunt pipe and the bottom annular shunt pipe; a plurality of inclined surface U-shaped water pipes are uniformly arranged on the outer surface of the cold and heat exchange pipe close to the central heat conduction pipe.

[0025] The circulation pipeline adopts a central heat conduction pipe, a top annular shunt pipe, a bottom annular shunt pipe, a cold and heat exchange pipe and an inclined surface U-shaped water pipe to form a multi-dimensional heat exchange structure. The inclined surface U-shaped water pipe increases the contact area between the water flow in the cold and heat exchange pipe and the fixed matrix, and the inclined surface design promotes heat convection. The top annular shunt pipe and the bottom annular shunt pipe balance the water flow pressure and avoid local water flow short circuit.

[0026] Preferably, a first water pipe head fixedly connected to the bottom annular shunt pipe is arranged at the bottom of the central heat conduction pipe, and a second water pipe head fixedly connected to the top annular shunt pipe is arranged at the top thereof; the pumping assembly is connected to the first water pipe head; the water conveying assembly is connected to the second water pipe head.

[0027] The pumping assembly is connected to the first water pipe head at the bottom, and the water conveying assembly is connected to the second water pipe head at the top to form a closed-loop water circulation.

[0028] Hot water rises due to the density difference, and cold water sinks, forming a self-driven circulation, reducing energy consumption and improving heat exchange efficiency. The water conveying assembly can quickly adjust the water flow speed and direction.

[0029] Preferably, a temperature sensor is arranged at the water outlet of the pumping assembly, and the temperature sensor is used to monitor the temperature of the circulating water source in real time.

[0030] A temperature sensor is arranged at the water outlet of the pumping assembly to monitor the water temperature in real time. Automatically adjust the water circulation rate in the water circulation assembly according to the water temperature to prevent the high thermal conductivity energy pile from overheating or overcooling. Reduce unnecessary pump operation and reduce energy consumption.

[0031] Preferably, a plurality of heat absorption columns are circumferentially and uniformly arranged around the fixed matrix.

[0032] A plurality of heat absorption columns are circumferentially and uniformly distributed around the fixed matrix to form a symmetric heat absorption network. Avoid the risk of cracking of the fixed matrix caused by sudden change of local soil temperature. Uniform heat absorption reduces the temperature fluctuation of the system and improves the reliability of energy supply.

[0033] The second part, a manufacturing method of a high thermal conductivity energy pile, includes the following steps: S1. Drill a pouring groove for burying the fixed matrix on the upper end surface of the land, drill a heat absorption column pre-buried groove with a depth greater than that of the pouring groove outside the pouring groove, and a strip-shaped connecting groove communicating with each other is arranged between the heat absorption column pre-buried groove and the pouring groove; S2. Weld the circulation pipeline: the central heat conduction pipe, the top annular shunt pipe, the bottom annular shunt pipe, the cold and heat exchange pipe, and the inclined U-shaped water pipe; S3. Weld the water delivery component and the water pumping component to both ends of the central heat conduction pipe; S4. Place the water circulation component in the casting groove, and install the heat absorption device: insert the heat absorption column into the pre-embedded groove of the heat absorption column, and embed the heat conduction head into the casting groove through the strip-shaped connecting groove; S5. Pour cement in the casting groove to form a fixed matrix, ensuring that the heat conduction head is completely embedded inside the fixed matrix; S6. Turn on the temperature sensor. When the temperature sensor detects that the temperature exceeds the predetermined water source temperature threshold, start the water pumping component to extract the hot water in the circulation pipeline, and supplement the low-temperature water source into the circulation pipeline through the water delivery component to form a dynamic thermal balance.

[0034] Through the prefabricated casting groove, the pre-embedded groove of the heat absorption column and the strip-shaped connecting groove, the water circulation component is welded step by step and the fixed matrix is cast, finally forming an integrated structure. Modular prefabrication shortens the construction period and reduces the difficulty of on-site operations. The casting process ensures the tight combination of the heat conduction head and the fixed matrix, improving the heat conduction efficiency.

[0035] Compared with the prior art, the present invention has the following beneficial effects: A high thermal conductivity energy pile, through the dual heat exchange paths of internal heat circulation and external network heat absorption, significantly improves the heat conduction efficiency, avoids heat accumulation, enables the sustainable utilization of geothermal resources, extends the service life of the equipment, and at the same time the extracted hot water can be directly supplied for domestic or industrial use, realizing the full utilization of geothermal energy and improving the energy efficiency of the device.

[0036] Furthermore, the wavy heat absorption layer increases the heat absorption area of the heat absorption device, and the heat absorption per unit volume is significantly improved; the phase change energy storage layer stores heat during the low electricity consumption period and releases heat during the peak period, matching the demand fluctuations, improving the stability of the entire high thermal conductivity energy pile, and the latent heat characteristic of the phase change energy storage layer reduces the amplitude of the output temperature fluctuation.

[0037] Furthermore, the ultra-long heat absorption column can penetrate deep into the underground constant temperature layer, significantly improving the heat absorption efficiency in winter and the heat dissipation efficiency in summer. The column body of the ultra-long heat absorption column effectively avoids the influence of surface freeze-thaw cycles, greatly reducing the equipment failure rate.

[0038] Furthermore, the heat conduction wire uses high-performance heat conduction wire materials, significantly shortening the heat transfer path, significantly shortening the response time, eliminating the internal temperature difference of the phase change material, effectively improving the heat storage efficiency and avoiding material failure.

[0039] Furthermore, the high-temperature phase change layer on the upper layer of the phase change energy storage layer and the low-temperature phase change layer on the lower layer are respectively adapted to the winter and summer working conditions, extending the annual operation duration of the system. The layered design reduces the phase change frequency of the material, significantly extending the service life of the material.

[0040] Furthermore, the inclined surface U-shaped water pipe design enhances the eddy current effect, greatly improving the convective heat transfer efficiency. The annular shunt pipe optimizes the flow field distribution, significantly improving the temperature uniformity of the fixed matrix.

[0041] Furthermore, the water circulation component utilizes the natural density difference to drive the water flow to achieve energy-saving circulation, independently adjusts the water delivery component and the pumping component, realizes precise flow control, and significantly reduces the energy consumption of the water pump.

[0042] Furthermore, the temperature sensor cooperates with the intelligent algorithm to maintain the temperature stability in the water circulation component, can automatically start and stop the water delivery component and the pumping component, realizes energy-saving optimization, and greatly reduces the operation energy consumption.

[0043] Furthermore, multiple heat absorption columns are evenly arranged to effectively disperse the thermal stress, significantly reducing the temperature difference of the fixed matrix and greatly improving the operation reliability.

[0044] A manufacturing method of a high thermal conductivity energy pile, which is quickly assembled on-site through prefabricated components, significantly compresses the construction period. The factory processing ensures the pipeline sealing performance, and the standardized production improves the material utilization rate and reduces the cost.

[0045] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The following further describes the present invention with reference to the drawings: Figure 1 is a schematic cross-sectional structure diagram of a high thermal conductivity energy pile of the present invention; Figure 2 is an assembly schematic diagram of a high thermal conductivity energy pile of the present invention; Figure 3 is a schematic structure diagram of the water circulation component of the present invention; Figure 4 is Figure 3 an enlarged structure schematic diagram at A of Figure 5 is an assembly schematic diagram of a manufacturing method of a high thermal conductivity energy pile of the present invention; Figure 6 is Figure 5 an enlarged structure schematic diagram at B of The reference numerals are explained as follows: Land 1, pouring groove 11, heat absorption column embedded groove 12, strip connection groove 13, fixed base 2, water circulation assembly 3, pumping assembly 31, temperature sensor 311, water suction pipe 312, water pump 313, circulation pipeline 32, central heat conduction pipe 321, first water pipe head 3211, second water pipe head 3212, top annular shunt pipe 322, top connecting pipe 3221, bottom annular shunt pipe 323, bottom connecting pipe 3231, cold and heat exchange pipe 324, inclined surface U-shaped water pipe 3241, water conveying assembly 33, water conveying pipe 331, water pump 332, heat absorption device 4, heat absorption column 41, heat conduction head 42, wavy heat absorption layer 412, phase change energy storage layer 413, heat conduction line 414, heat insulation protection head 421, corrosion-resistant coating 411. Specific embodiments

[0047] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in the embodiments without creative efforts belong to the protection scope of the present invention.

[0048] In the following description, terms such as "inner", "outer", "upper", "lower", "left", "right", etc. indicating directions or positional relationships are only for convenience in describing the embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be construed as a limitation of the present invention.

[0049] As Figures 1 to 5 shown, a high thermal conductivity energy pile includes a fixed base 2, a water circulation assembly 3 and a heat absorption device 4. The fixed base 2 adopts a reinforced concrete structure, and the water circulation assembly 3 is embedded inside. The water circulation assembly 3 is composed of a pumping assembly 31, a circulation pipeline 32 and a water conveying assembly 33; among them, the circulation pipeline 32 includes a central heat conduction pipe 321, a top annular shunt pipe 322, a bottom annular shunt pipe 323 and a cold and heat exchange pipe 324. The inclined surface U-shaped water pipes 3241 are uniformly arranged on the cold and heat exchange pipe 324, and this design effectively increases the contact area between the circulation pipeline 32 and the fixed base 2. The water circulation path of the water circulation assembly 3 utilizes the principle that hot water rises to the top annular shunt pipe 322 due to the density difference and cold water sinks to the bottom annular shunt pipe 323 to form a natural convection cycle.

[0050] Among them, a first water pipe head 3211 is provided at the bottom of the central heat conduction pipe 321 and is fixedly communicated with the bottom annular shunt pipe 323, and a second water pipe head 3212 is provided at the top thereof and is fixedly communicated with the top annular shunt pipe 322; the water pumping assembly 31 is connected to the first water pipe head 3211; the water conveying assembly 33 is connected to the second water pipe head 3212. A plurality of top communication pipes 3221 communicating therewith are provided between the top annular shunt pipe 322 and the second water pipe head 3212, and a plurality of bottom communication pipes 3231 communicating therewith are provided between the bottom annular shunt pipe 323 and the first water pipe head 3211.

[0051] Further, a temperature sensor 311 is provided at the water outlet of the water pumping assembly 31, which can monitor the circulating water temperature in real time. The water pumping assembly 31 further includes a water suction pipe 312 and a water suction pump 313; the water suction pump 313 is assembled at one end of the water suction pipe 312, the water suction pump 313 is outside the fixed base 2, and the other end of the water suction pipe 312 is communicated with the first water pipe head 3211. The water suction pump 313 sucks the liquid in the first water pipe head 3211 and sucks out the hot water generated by heat accumulation from the pipeline at the bottom of the circulating pipeline 32.

[0052] The water conveying assembly 33 includes a water delivery pipe 331 and a water delivery pump 332; the water delivery pump 332 is assembled at one end of the water delivery pipe 331, the water delivery pipe 331 is outside the fixed base 2, and the other end of the water delivery pipe 331 is communicated with the second water pipe head 3212. The low-temperature water is conveyed to the circulating pipeline 32 through the delivery pump 332, so that the heat in the fixed base 2 is absorbed to prevent heat accumulation.

[0053] A heat absorption device 4 is provided outside the fixed base 2. The heat absorption device 4 includes a plurality of heat absorption columns 41 vertically distributed; a heat conduction head 42 embedded in the fixed base 2 is provided at the upper end of the heat absorption column 41; the length of the heat absorption column 41 is greater than the length of the fixed base 2 and can penetrate into the underground constant temperature layer. A heat conduction head 42 embedded in the fixed base 2 is provided at the top of the heat absorption column 41, which is made of a high thermal conductivity material such as copper alloy and becomes the key bridge for heat conduction.

[0054] A plurality of heat absorption columns 41 are circumferentially and evenly arranged around the fixed base 2. Moreover, the length of the heat absorption column 41 is greater than the length of the fixed base 2, and a plurality of heat absorption columns 41 can form a heat absorption network to conduct the heat located outside the fixed base 2 and deep underground to the fixed base 2, thereby improving the heat absorption effect of the device.

[0055] Among them, the heat absorption column 41 is successively composed of a heat conduction wire 414, a phase change energy storage layer 413, a corrugated heat absorption layer 412 and a corrosion-resistant coating 411 from the inside to the outside; the corrosion-resistant coating 411 is applied outside the corrugated heat absorption layer 412 and can prevent microorganisms in the soil 1 from corroding the heat absorption device 4.

[0056] Furthermore, a heat conduction line 414 connected to the heat conduction head 42 is embedded in the phase change energy storage layer. The heat conduction line 414 is usually made of copper wire or graphene wire, which further accelerates the heat transfer. A heat insulation protection head 421 is provided at the connection between the heat conduction head 42, the heat conduction line 414, and the connection of the heat conduction head 42 and the heat conduction line 414, which is used to fix the positions of the heat conduction head 42 and the heat conduction line 414, facilitating the heat conduction head 42 to be embedded and fixed in the fixed matrix 2; and during installation, it prevents the heat conduction line 414 from breaking between the heat conduction head 42 and between the heat conduction line 414 and the heat absorption column 41.

[0057] An inner side of the wavy heat absorption layer 412 is provided with a phase change energy storage layer 413. The phase change energy storage layer 413 is filled with a phase change energy storage material such as paraffin. And according to the vertical direction of the heat absorption column 41, the upper layer of the phase change energy storage layer 413 is a high-temperature phase change layer, and the lower layer is a low-temperature phase change layer to match the temperature gradients of soils at different depths. The phase change energy storage layer 413 stores heat during the heat absorption process, and when the surrounding environmental temperature is too high, it can also release heat. The water circulation device 3 absorbs the heat released by the phase change energy storage layer 413 through the heat conduction head 42 to jointly regulate the formation temperature and effectively prevent the impact of heat accumulation on the sustainable utilization of geothermal resources. By adopting the combined heat extraction of the above water circulation device 3 and the heat absorption device 4, the heat absorption efficiency of geothermal resources is significantly improved.

[0058] Among them, the wavy heat absorption layer 412 increases the contact area with the soil, and further enables the heat absorption column 41 to increase the heat absorption area, enabling the phase change energy storage layer 413 to more fully exchange heat with the surrounding formation. The phase change energy storage layer 413 can absorb a large amount of heat during the phase change process, improving the heat absorption efficiency and overcoming the problem of limited heat absorption efficiency.

[0059] A manufacturing method of a high thermal conductivity energy pile includes the following steps: S1. Drill a pouring groove 11 for embedding the fixed matrix 2 on the upper end surface of the land 1, and drill a heat absorption column pre-embedding groove 12 with a depth greater than that of the pouring groove 11 outside the pouring groove 11. A strip-shaped connection groove 13 communicating with each other is provided between the heat absorption column pre-embedding groove 12 and the pouring groove 11. The strip-shaped connection groove 13 is used for the embedding and positioning of the heat conduction head 42.

[0060] S2. Weld the circulation pipeline 32: the central heat conduction pipe 321, the top annular shunt pipe 322, the bottom annular shunt pipe 323, the cold and heat exchange pipe 324, and the inclined surface U-shaped water pipe 3241.

[0061] S3. Weld the water delivery component 33 and the water pumping component 31 at both ends of the central heat conduction pipe 321.

[0062] S4. Place the water circulation component 3 in the pouring groove 11 and install the heat absorption device 4: insert the heat absorption column 41 into the pre-embedded groove 12 of the heat absorption column, and embed the heat conduction head 42 into the pouring groove 11 through the strip-shaped connection groove 13.

[0063] S5. Pour cement in the pouring groove 11 to form a fixed matrix 2, ensuring that the heat conduction head 42 is completely embedded inside the fixed matrix 2.

[0064] S6. Turn on the temperature sensor 311. When the temperature sensor 311 detects that the temperature exceeds the predetermined water source temperature threshold, start the pumping component 31 to pump the hot water in the circulation pipeline 32, and supplement the low-temperature water source into the circulation pipeline 32 through the water delivery component 33 to form a dynamic thermal balance.

[0065] As described above, only the specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes not only the content described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A highly heat-conductive energy pile, comprising a fixed base body (2) with a water circulation component (3) buried therein; characterized in that, The water circulation component (3) includes a water pumping component (31), a circulation pipeline (32), and a water delivery component (33) that are connected and communicate with each other; a heat absorption device (4) is provided outside the fixed base body (2), and the heat absorption device (4) includes a plurality of heat absorption columns (41) vertically distributed; a heat conduction head (42) embedded in the fixed base body (2) is provided at the upper end of the heat absorption column (41).

2. The high thermal conductivity energy pile according to claim 1, characterized in that A wavy heat absorption layer (412) is provided on the outer surface of the heat absorption column (41), and a phase change energy storage layer (413) is provided inside the wavy heat absorption layer (412).

3. A highly thermally conductive energy pile according to claim 1 or 2, characterized in that, The length of the heat absorption column (41) is greater than the length of the fixed base body (2).

4. A highly thermally conductive energy pile according to claim 2, characterized in that, A heat conduction wire (414) connected to the heat conduction head (42) is buried in the phase change energy storage layer (413).

5. A highly thermally conductive energy pile according to claim 2, characterized in that, The upper layer of the phase change energy storage layer (413) in the vertical direction of the heat absorption column (41) is a high-temperature phase change layer, and the lower layer is a low-temperature phase change layer.

6. The high thermal conductivity energy pile according to claim 1, wherein, The circulation pipeline (32) includes a central heat conduction pipe (321), a top annular shunt pipe (322), and a bottom annular shunt pipe (323) that are connected and communicate with the central heat conduction pipe (321), and a cold and heat exchange pipe (324) is connected between the top annular shunt pipe (322) and the bottom annular shunt pipe (323); a plurality of inclined U-shaped water pipes (3241) are uniformly provided on the outer surface of the cold and heat exchange pipe (324) close to the central heat conduction pipe (321).

7. A highly thermally conductive energy pile according to claim 6, characterized in that, A first water pipe head (3211) fixedly connected to the bottom annular shunt pipe (323) is provided at the bottom of the central heat conduction pipe (321), and a second water pipe head (3212) fixedly connected to the top annular shunt pipe (322) is provided at the top thereof; the water pumping component (31) is connected to the first water pipe head (3211); the water delivery component (33) is connected to the second water pipe head (3212).

8. A highly thermally conductive energy pile according to claim 1, characterized in that, A temperature sensor (311) is provided at the water outlet of the water pumping component (31), and the temperature sensor (311) is used to monitor the temperature of the circulating water source in real time.

9. A highly heat-conductive energy pile according to claim 1, characterized in that, The plurality of heat absorption columns (41) are circumferentially and uniformly arranged around the fixed base body (2).

10. A manufacturing method of a high thermal conductivity energy pile, characterized in that, Applicable to a highly heat-conductive energy pile as described in any one of claims 1-9; comprising the following steps: S1. Drill a pouring groove (11) for embedding the fixed base body (2) on the upper end surface of the land (1), drill a heat absorption column pre-embedding groove (12) with a depth greater than that of the pouring groove (11) outside the pouring groove (11), and a strip-shaped connecting groove (13) communicating with each other is provided between the heat absorption column pre-embedding groove (12) and the pouring groove (11); S2. Weld the circulation pipeline (32): the central heat conduction pipe (321), the top annular shunt pipe (322), the bottom annular shunt pipe (323), the cold and heat exchange pipe (324), and the inclined U-shaped water pipe (3241); S3. Weld the water delivery component (33) and the water pumping component (31) to both ends of the central heat conduction pipe (321); S4. Place the water circulation component (3) in the pouring groove (11) and install the heat absorption device (4): insert the heat absorption column (41) into the pre-embedded groove (12) of the heat absorption column, and embed the heat conduction head (42) into the pouring groove (11) through the strip-shaped connection groove (13); S5. Pour cement in the pouring groove (11) to form a fixed base (2), ensuring that the heat conduction head (42) is completely embedded inside the fixed base (2); S6. Turn on the temperature sensor (311). When the temperature sensor (311) detects that the temperature exceeds the predetermined water source temperature threshold, start the pumping component (31) to pump the hot water in the circulation pipeline (32), and supplement the low-temperature water source into the circulation pipeline (32) through the water conveying component (33) to form a dynamic thermal balance.

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