CN209960790U - Efficient geothermal utilization system based on solid heat conduction - Google Patents
Efficient geothermal utilization system based on solid heat conduction Download PDFInfo
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- CN209960790U CN209960790U CN201822170039.4U CN201822170039U CN209960790U CN 209960790 U CN209960790 U CN 209960790U CN 201822170039 U CN201822170039 U CN 201822170039U CN 209960790 U CN209960790 U CN 209960790U
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Abstract
The utility model provides a high-efficient geothermal utilization system based on solid heat-conduction, including heat transfer well, underground heat collection section, ground heat exchange device and solid-state heat transfer pole, the heat transfer well sets up in the stratum, and its upper end upwards extends to ground department, and its lower extreme downwardly extending to in the geothermal reservoir, the heat transfer well is located part in the geothermal reservoir forms underground heat collection section to collect the geothermal energy in the geothermal reservoir, ground heat exchange device sets up on ground, and solid-state heat transfer pole sets up in the heat transfer well, and its one end is connected with ground heat exchange device, and the other end downwardly extending is to in the underground heat collection section, conducts the geothermal energy in the geothermal reservoir that underground heat collection section was collected to ground heat exchange device. The utility model provides a high-efficient ground heat utilization system based on solid heat-conduction utilizes the solid medium to realize geothermal transmission, and its core component solid heat transfer rod system and relevant thermal-insulated system of thermal-arrest have high efficiency, the environmental protection, advantages such as range of application is wide.
Description
Technical Field
The utility model relates to a geothermal resource utilizes the field. More specifically, the present invention relates to a high efficiency geothermal utilization system based on solid heat conduction.
Background
Geothermal resources are one of the important renewable resources. The difference in the geothermal utilization temperature range is mainly divided into two types: one is medium and low temperature geothermal, the temperature range is usually below 150 ℃, and medium and low temperature geothermal resources are usually distributed in shallow underground or earth surface. One is high temperature geothermal with a temperature range of 150 ℃ to 360 ℃. High temperature geothermal resources are typically distributed in deep underground formations such as hot dry rock formations, high temperature steam, etc. (which may be as deep as 5000 meters to 7000 meters, and even deeper). The medium-low temperature terrestrial heat conducts geothermal resources to the ground through the ground source heat pump, so that heating of buildings and heating of water heaters are realized. The high-temperature geothermal heat realizes power generation through a steam turbine. The utility model discloses a geothermol power utilizes system is applicable to the well low temperature geothermol power and the utilization of high temperature geothermol power of universe.
The heat transfer medium in conventional geothermal utilization systems is typically a liquid, a vapor, or a mixture of liquid and vapor. The high temperature liquid, steam, carries geothermal energy from underground to above ground through pipelines. In the conventional geothermal utilization method, a part of geothermal energy is inevitably converted into energy of a transmission medium to be lost and dissipated. In addition, the transmission of liquid and steam in the pipeline has a series of problems of friction, pipeline corrosion, scaling and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient geothermal utilization system based on solid heat-conduction utilizes the solid medium to realize geothermal energy transmission, and its core component solid heat transfer pole has high efficiency, environmental protection, advantages such as range of application is wide.
In order to achieve these objects and other advantages in accordance with the present invention, there is provided a solid heat conduction-based efficient geothermal utilization system, comprising a heat transfer well, a subsurface heat collecting section, a ground heat exchanging device and a solid heat transfer rod, wherein the heat transfer well is disposed in a ground layer, the upper end of the heat transfer well extends upward to the ground, the lower end of the heat transfer well extends downward into a subsurface heat reservoir, the portion of the heat transfer well located in the subsurface heat reservoir forms the subsurface heat collecting section to collect geothermal energy in the subsurface heat reservoir, the ground heat exchanging device is disposed on the ground, the solid heat transfer rod is disposed in the heat transfer well, one end of the solid heat transfer rod is connected to the ground heat exchanging device, and the other end of the solid heat transfer rod extends downward into the subsurface heat collecting section to transfer the geothermal energy collected in the subsurface heat reservoir to the ground heat exchanging device.
Preferably, in the efficient geothermal heat utilization system based on solid heat conduction, the underground heat collection section comprises an outer casing and a heat conducting interface material, the outer casing is arranged in a geothermal reservoir, a casing is arranged in the heat transfer well, the upper end of the casing extends upwards to the ground, the lower end of the casing is communicated with the outer casing, and the heat conducting interface material is filled between the part of the solid heat transfer rod located in the underground heat collection section and the inner wall of the outer casing, so that the part of the solid heat transfer rod located in the underground heat collection section is in full contact with the geothermal reservoir through the heat conducting interface material and absorbs geothermal heat energy.
Preferably, in the efficient heat utilization system based on solid heat conduction, the solid heat conduction rod is a heat conduction rod bundle consisting of a single heat conduction rod or a plurality of heat conduction rods, one end of the heat conduction rod bundle is connected with the ground heat exchange device, and the other end of the heat conduction rod bundle penetrates through the casing and extends into a ground heat reservoir.
Preferably, in the efficient heat utilization system based on solid heat conduction, the part of the heat conducting rod bundle located in the sleeve (41) is sleeved with a heat insulation layer.
Preferably, in the efficient heat utilization system based on solid heat conduction, the heat conduction rod can be made of metal, alloy, carbon nanotube, graphene, diamond, carbon material or silicon material, or other materials with thermal conductivity more than 200W.m-1.K-1Is made of the material of (1).
Preferably, in the efficient heat utilization system based on solid heat conduction, the sleeve can be made of glass fiber composite materials or steel pipes.
Preferably, in the solid heat conduction-based efficient heat utilization system, the system further comprises a pressure control device, and the pressure control device is communicated with the interior of the casing so as to adjust the pressure inside the casing.
Preferably, the efficient geothermal heat utilization system based on solid heat conduction further comprises at least one inclined-well heat collecting section or horizontal-well heat collecting section, the inclined-well heat collecting section or the horizontal-well heat collecting section is arranged in the geothermal reservoir, and one end of the inclined-well heat collecting section or the horizontal-well heat collecting section is connected with the heat transfer well.
The utility model utilizes the solid medium to transmit terrestrial heat, thereby avoiding the energy loss of fluid in the transmission process and a series of problems caused by pipeline corrosion and scaling; meanwhile, underground environment damage and pollution caused by medium exchange are avoided. Because the utility model discloses in no longer need squeeze into the underground or extract ground to the bottom medium with subaerial heat transfer medium, firstly can not destroy ground or underground environment, do not use the medium pump simultaneously, can reduce the cost of construction and operation, also reduced the production of noise simultaneously.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a geothermal utilization system according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a solid state heat transfer rod according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a solid state heat transfer rod according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a geothermal utilization system according to another embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of 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 thus, should not be construed as limiting the present invention.
As shown in fig. 1, the embodiment of the present invention provides a high-efficiency geothermal heat utilization system based on solid heat conduction, which includes a heat transfer well 1, an underground heat collecting section 2, a ground heat exchange device 3 and a solid heat transfer rod 4, wherein the heat transfer well 1 is disposed in the ground, the upper end of which extends upwards to the surface and the lower end of which extends downwards into a geothermal reservoir, the part of the heat transfer well 1 located in the geothermal reservoir forming the underground heat collecting section 2, for collecting geothermal energy in a geothermal reservoir, the surface heat exchange device 3 is arranged on the surface, the solid heat transfer rod 4 is arranged in the heat transfer well 1, one end of which is connected with the ground heat exchange device 3, and the other end extends downwards into the underground heat collecting section 2, to conduct the geothermal energy in the geothermal reservoir collected by the underground heat collecting section 2 to the surface heat exchange device 3.
In the technical scheme, the geothermal utilization system comprises a heat transfer well 1, an underground heat collection section 2, a ground heat exchange device 3 and a solid heat transfer rod 4, wherein the heat transfer well 1 is arranged in a stratum, the underground heat collection section 2 is arranged in a geothermal reservoir as an extension of the heat transfer well 1, the medium-low temperature geothermal reservoir generally exists in a shallow underground soil layer or a water layer, the high-temperature geothermal reservoir is generally positioned in an underground dry-hot rock layer or an underground hot steam enrichment area, the ground heat exchange device 3 is arranged at an upper end opening of the heat transfer well 1, one end of the solid heat transfer rod 4 is connected with the ground heat exchange device 3, the other end of the heat transfer rod 4 extends into the underground heat collection section 2, and the ground heat exchange device 3 can be realized by the prior art; the geothermal energy in the geothermal reservoir is collected through the part of the solid heat transfer rod 4 positioned in the underground heat collecting section 2, and the geothermal energy is transferred to the ground heat exchange device 3 through the part of the solid heat transfer rod 4 positioned in the heat transfer well 1, and the ground heat exchange device 3 can also adopt the existing heat exchange device to use the geothermal energy for heating or thermal power generation.
In the efficient geothermal heat utilization system based on solid heat conduction, the underground heat collecting section 2 comprises an outer casing 21 for conducting heat and a heat conducting interface material 22, the outer casing 21 is arranged in a geothermal reservoir, a casing 41 is arranged in the heat transfer well 1, the upper end of the casing extends upwards to the ground, the lower end of the casing is communicated with the outer casing 21, and the solid heat transfer rod 4 is filled with the heat conducting interface material 22 between the part of the underground heat collecting section 2 and the inner wall of the outer casing 21, so that the part of the solid heat transfer rod 4 located in the underground heat collecting section 2 is in full contact with the geothermal reservoir through the heat conducting interface material 22 and absorbs geothermal heat energy efficiently.
In another technical scheme, the underground heat collecting section 2 comprises an outer casing 21 and a heat conducting interface material 22, the outer casing 21 is made of a material with good heat conducting performance and is arranged in a geothermal reservoir, the solid heat transfer rod 4 is arranged between the part of the underground heat collecting section 2 and the inner wall of the outer casing 21 and is filled with the heat conducting interface material 22, the heat conducting interface material 22 is made of the existing heat interface material, the underground heat collecting pipe 2 can exchange heat with the geothermal layer without being obstructed through the heat conducting interface material 22, the efficient heat collecting effect is achieved, and the ground heat exchange device 3 can also adopt the existing heat exchange device to use geothermal heat for heating or thermal power generation.
In the efficient heat utilization system based on solid heat conduction shown in fig. 2-3, the solid heat conduction rod 4 is a heat conduction rod bundle 43 composed of a single heat conduction rod or a plurality of heat conduction rods, one end of the heat conduction rod bundle 43 is connected to the ground heat exchange device 3, and the other end thereof passes through the sleeve 41 and extends into the outer sleeve 21.
In another technical scheme, the solid heat transfer rod 4 is a heat transfer rod bundle 43 consisting of a plurality of heat transfer rods, the sleeve 41 mainly plays a role in protecting and supporting a heat transfer channel, and the heat insulation sleeve 41 made of a composite material with high temperature resistance, corrosion resistance and heat insulation can also play a role in heat insulation depending on required materials; compared with a single heat conducting rod with a larger radius, the heat conducting rod bundle consisting of the plurality of heat conducting rods with smaller radius has a larger specific surface area and a better heat collecting effect, and the heat collecting effect of the heat conducting rod bundle can be improved; the heat conduction pipe can be made of metal materials, such as silver, iron, steel, copper, aluminum/aluminum substrates, various alloys, such as molybdenum alloy or high heat conduction carbon materials, such as graphite materials, carbon nanotube materials, graphene materials, diamond, silicon materials or composite materials thereof, and the diameter of the heat conduction rod or the heat conduction rod bundle made of a plurality of heat conduction rods can be determined according to the heat conductivity of the materials and the power requirement of geothermal application.
In the efficient heat utilization system based on solid heat conduction, as shown in fig. 2-3, the sub-heat conducting rod bundles 43 are externally sleeved with the heat insulating layer 42.
In another technical scheme, the heat insulation layer 42 mainly plays a role in heat insulation in a heat transmission section needing heat insulation, so as to reduce heat energy loss in the transmission process, as shown in fig. 2 to 3, whether a gap is left between the heat insulation sleeve 41 and the heat insulation layer 42 can also be determined according to actual needs, so as to flexibly meet different application requirements.
In the efficient geothermal utilization system based on solid heat conduction, the heat conduction rod can be made of metal, alloy, carbon nano tube, graphene, diamond, carbon material or silicon material, or other materials with the thermal conductivity of more than 200W.m-1.K-1Is made of the material of (1).
In the efficient heat utilization system based on solid heat conduction, the sleeve 41 can be made of glass fiber composite materials or steel pipes.
In another embodiment, the sleeve 41 can be made of a material with an outer layer protection and support function, such as a steel pipe or a glass fiber composite pipe, and the sleeve can be made of one or more layers of inner heat insulation layers such as aerogel, heat insulation foam glass fiber, or heat insulation ceramic, heat insulation polymer material/foam, for example, polyurethane heat insulation foam, polystyrene material, and other multi-layer materials.
In the solid heat conduction-based efficient heat utilization system, a pressure control device is further included, and the pressure control device is communicated with the interior of the casing 41 to adjust the pressure inside the casing 41.
In another technical solution, in order to prevent the thermal insulation sleeve 41 from being broken due to an excessive pressure difference between the inside and the outside of the thermal insulation sleeve 41, as shown in fig. 3, a gap is formed between the thermal insulation sleeve 41 and the thermal insulation layer 42, and a pressure control device is provided and communicates with the inside of the thermal insulation sleeve 41, the pressure control device may be in a form of gas or liquid filling, and the pressure control device maintains the balance between the pressure inside the sleeve and the pressure of the ground layer outside the sleeve or within the applicable range of the strength of the outer sleeve, so as to ensure the normal use of the thermal insulation sleeve 41 and prolong the service life thereof.
As shown in fig. 4, the efficient geothermal heat utilization system based on solid heat conduction further includes at least one inclined-well heat collecting section or horizontal-well heat collecting section, the inclined-well heat collecting section or the horizontal-well heat collecting section is disposed in a geothermal reservoir, and one end of the inclined-well heat collecting section or the horizontal-well heat collecting section is connected to the heat transfer well 1.
In another technical scheme, at least one section of inclined well heat collecting section or horizontal well heat collecting section is arranged in the geothermal reservoir, and the inclined well heat collecting section or the horizontal well heat collecting section can adopt the same structure as the underground heat collecting section 2 and is used as a supplement of the underground heat collecting section 2 to enhance the heat conduction effect of the solid heat transfer pipeline 4.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (8)
1. The efficient geothermal utilization system based on solid heat conduction is characterized by comprising a heat transfer well (1), an underground heat collection section (2), a ground heat exchange device (3) and a solid heat transfer rod (4), wherein the heat transfer well (1) is arranged in a stratum, the upper end of which extends upwards to the ground surface and the lower end of which extends downwards into a geothermal reservoir, the part of the heat transfer well (1) located in the geothermal reservoir forming the underground heat collecting section (2), for collecting geothermal energy in a geothermal reservoir, the surface heat exchange device (3) is arranged on the surface, the solid heat transfer rod (4) is arranged in the heat transfer well (1), one end of the heat exchanger is connected with the ground heat exchange device (3), the other end extends downwards into the underground heat collecting section (2), so as to conduct the geothermal energy in the geothermal reservoir collected by the underground heat collecting section (2) to the surface heat exchange device (3).
2. A high efficiency geothermal energy utilization system based on solid heat conduction according to claim 1, wherein the underground heat collecting section (2) comprises an outer casing (21) and a heat conducting interface material (22), the outer casing (21) is arranged in a geothermal reservoir, a casing (41) is arranged in the heat transfer well (1), the upper end of the casing extends upwards to the ground, the lower end of the casing is communicated with the outer casing (21), the solid heat transfer rod (4) is filled with the heat conducting interface material (22) between the part of the underground heat collecting section (2) and the inner wall of the outer casing (21), so that the part of the solid heat transfer rod (4) located in the underground heat collecting section (2) is in contact with the geothermal reservoir through the heat conducting interface material (22) and absorbs geothermal energy.
3. The system for efficient heat utilization based on solid heat conduction as claimed in claim 2, wherein the solid heat conducting rod (4) is a heat conducting rod bundle (43) consisting of a single heat conducting rod or a plurality of heat conducting rods, one end of the heat conducting rod bundle (43) is connected to the ground heat exchanging device (3), and the other end thereof passes through the sleeve (41) and extends into the outer sleeve (21).
4. A solid heat conduction based efficient heat utilization system according to claim 3, wherein the heat conducting rod bundle (43) is located at the portion inside the casing (41) which is sheathed with a heat insulating layer (42).
5. The system of claim 4, wherein the heat conducting rod is made of metal, alloy, carbon nanotube, graphene, diamond, carbon material or silicon material.
6. A solid heat conduction based high efficiency heat utilization system according to claim 3, wherein said sleeve (41) is made of fiberglass composite or steel pipe.
7. A solid heat conduction based efficient heat utilization system according to claim 3, further comprising a pressure control device communicating with the interior of said casing (41) to regulate the pressure inside said casing (41).
8. The efficient geothermal heat utilization system based on solid heat conduction according to any one of claims 1 to 7, further comprising at least one inclined or horizontal well heat collection section arranged in a geothermal reservoir and connected at one end to the heat transfer well (1).
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| CN201822170039.4U CN209960790U (en) | 2018-12-21 | 2018-12-21 | Efficient geothermal utilization system based on solid heat conduction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539610A (en) * | 2018-12-21 | 2019-03-29 | 华赢管道监测技术服务(湖北)有限公司 | A kind of efficient terrestrial heat utilization system based on solid thermal conduction and its utilize method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539610A (en) * | 2018-12-21 | 2019-03-29 | 华赢管道监测技术服务(湖北)有限公司 | A kind of efficient terrestrial heat utilization system based on solid thermal conduction and its utilize method |
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