CN110017528A - A kind of interior heating system and method extracting underground heat using more piece relay hot tube high-efficiency - Google Patents

A kind of interior heating system and method extracting underground heat using more piece relay hot tube high-efficiency Download PDF

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Publication number
CN110017528A
CN110017528A CN201910270579.6A CN201910270579A CN110017528A CN 110017528 A CN110017528 A CN 110017528A CN 201910270579 A CN201910270579 A CN 201910270579A CN 110017528 A CN110017528 A CN 110017528A
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heat
heat pipe
relay
section
variable diameter
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王沣浩
蔡皖龙
王志华
刘俊
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Xian Jiaotong University
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Xian Jiaotong University
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Priority to CN201910270579.6A priority Critical patent/CN110017528A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00Other domestic- or space-heating systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24TGEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
    • F24T10/00Geothermal collectors
    • F24T10/40Geothermal collectors operated without external energy sources, e.g. using thermosiphonic circulation or heat pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00Heat sources or energy sources
    • F24D2200/11Geothermal energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/10Geothermal energy

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Road Paving Structures (AREA)

Abstract

A kind of interior heating system and method that underground heat is extracted using more piece relay hot tube high-efficiency of the present invention, while for building heat supplying, the phenomenon for avoiding traditional working medium forced cyclic type system fluid conveying wasted work excessive occurs.The system comprises successively mutually embedding be connected with the top heat pipe, relay heat pipe and bottom heat pipe set in underground along axial direction, it is of coupled connections with top heat pipe and extracts the heat exchanger of heat, and the heat pump unit that input terminal is connect with heat exchanger, the forming circuit that the output end of heat pump unit is connected with user by pipeline and water pump heat;The bottom heat pipe is connected with the coupling of relay heat pipe, is connected after the coupling of more piece relay heat pipe is connected with the coupling of top heat pipe;The variable diameter linkage section that the top of heat pipe diametrically reduces, middle part are adiabatic section, and lower hollow forms annular heating section, and variable diameter linkage section can be embedded in cooperation in annular heating section;Phase-change working substance corresponding with place warm area is perfused with inside every economizer tube.

Description

A kind of interior heating system and method extracting underground heat using more piece relay hot tube high-efficiency
Technical field
The present invention relates to geothermal energy resources and building energy to utilize technical field, and in particular to a kind of to utilize more piece relay heat pipe The interior heating system and method for high efficiency extraction underground heat.
Background technique
Increasingly serious with global warming and the state of air pollution, traditional fossil energy has been unable to meet sustainable development Requirement.Clean energy resource includes solar energy, wind energy, geothermal energy and biomass energy etc., and wherein geothermal energy is widely distributed, and is had steady Fixed, continuous and efficient advantage obtains extensive concern as fossil energy is increasingly in short supply in the world.
It is used to provide geothermal resource to domestic hot-water and building and heating now, has obtained extensive exploitation use.It is domestic A large amount of correlative studys are done in terms of external shallow ground source heat pump system, but the pipe laying area of the technology middle-shallow layer underground pipe is big, easily It is restricted by place and designs not that cold and hot energy imbalance was serious at that time.Deep geothermal resources is as the maximum underground heat of potentiality to be exploited Resource type is mainly used in power field at present, and in building energy supply field, the development and utilization of deep geothermal heat equally have certain spy Rope.The Average geothermal gradient of ground is about 3 DEG C/100m, and the every increase 100m of depth, the soil moisture increase self-constant temperature layer downward vertically 3 DEG C, then at the 2000m of underground, it is the huge heat of storage that ground temperature, which is about 75 DEG C (when considering that outdoor mean temperature is 15 DEG C), Source.
Deep geothermal heat extracting mode common at present is that directly geothermal water is extracted and used, but is existed in application process The problems such as recharge is difficult, groundwater resources pollute, rock-soil layer deformation displacement.And for deep layer ground heat exchanger, use work When making medium progress underground deep layer heat extraction, circulation power consumption is larger, and water pump operation expense even accounts for three points of overall running cost One of more than.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention, which provides, a kind of extracts underground heat using more piece relay hot tube high-efficiency Interior heating system and method avoid traditional working medium forced cyclic type system fluid conveying wasted work while for building heat supplying Excessive phenomenon occurs.
The present invention is to be achieved through the following technical solutions:
It is a kind of using more piece relay hot tube high-efficiency extract underground heat interior heating system, including along axial direction successively mutually embedding company The top heat pipe, relay heat pipe and bottom heat pipe of underground are set, is of coupled connections with top heat pipe and extracts the heat exchanger of heat, with And the heat pump unit that input terminal is connect with heat exchanger, the output end of heat pump unit are connected to be formed with user by pipeline and water pump Circuit heating;
The coupling of the bottom heat pipe and relay heat pipe is connected, after the coupling of more piece relay heat pipe is connected with top heat pipe Coupling is connected;The variable diameter linkage section that the top of heat pipe diametrically reduces, middle part are adiabatic section, and it is heated that lower hollow forms annular Section, variable diameter linkage section can be embedded in cooperation in annular heating section;It is perfused with inside every economizer tube corresponding with place warm area Phase-change working substance, the corresponding phase-change working substance is first from the base circle heating section interior suction thermal evaporation of place heat pipe, then at middle part Rise in adiabatic section, is finally back to shape in base circle heating section through middle part adiabatic section after condensing in the variable diameter linkage section of top At heat conductive circulation.
Preferably, it is arranged outside variable diameter linkage section in screw thread, annular heating section hollow wall is arranged in screw thread.
Preferably, heat-conducting silicone grease is set on the connecting end surface of variable diameter linkage section and annular heating section.
Preferably, variable diameter linkage section presents dome column or convex round table-like;The central area of corresponding annular heating section In recessed cylindric or recessed round table-like, variable diameter linkage section and annular heating section coaxial arrangement.
Preferably, top heat pipe, relay heat pipe and the bottom heat pipe outer portion of underground setting do not arrange backfilling material.
A kind of building heating method for extracting underground heat using more piece relay hot tube high-efficiency, based on described in above-mentioned any one System includes the following steps,
Step 1, the base circle heating section of bottom heat pipe is heated, and the phase-change working substance in the heat pipe of bottom undergoes phase transition rear working medium Steam rises in the adiabatic section in the heat pipe of bottom, condenses phase change region heat release to connecing in Base Heat tube top end variable diameter linkage section Power heat pipe, the base circle heating section that condensation phase change working medium returns to bottom heat pipe later continue cycling through;
Step 2, the base circle heating section of relay heat pipe is heated, and the phase-change working substance in relay heat pipe undergoes phase transition rear working medium Steam rises in the adiabatic section in relay heat pipe, and it is supreme to condense phase change region heat release in relay heat pipe top variable diameter linkage section Level-one relay heat pipe, the base circle heating section that condensation phase change working medium returns to this grade of relay heat pipe later continue cycling through;
Step 3, by the multiple transmitting of multi-stage relay heat pipe, heat is conducted to top layer, mutually exchanging work in the heat pipe of top Matter undergoes phase transition rear working substance steam and rises in the adiabatic section in the heat pipe of top, condenses in top heat pipe top variable diameter linkage section Phase change region heat release to the heat exchanger of coupling, later condensation phase change working medium return to the base circle heating section of this grade of relay heat pipe after Continuous circulation;
Step 4, the heat transferring medium of heat exchanger by heat extraction and is delivered to heat pump unit and provides heat for unit, promotes product Behind position, secondary side medium send to user by pipeline and uses;After user's use secondary side medium return unit and constantly into Row circulation.
Preferably, the variable diameter linkage section of heat pipe condenses latent heat of phase change to the annular heating section of cooperation from inner integrated release, The ground temperature of corresponding depth is absorbed outside annular heating section.
Preferably, the phase-change working substance being perfused inside every economizer tube according to warm area where heat pipe, using acetone, methanol, One of water, nanomaterial solution and mix refrigerant.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention extracts deep geothermal heat energy using the gravity assisted heat pipe of relay, reduces using the self-loopa characteristic of gravity assisted heat pipe The circulation power consumption of deep geothermal heat energy extraction element solves the problems, such as that the too long promotion resistance of tube side is excessive, passes through ground heat pump later It is building heating that unit, which promotes energy grade,.Meanwhile while more piece Heat pipe joint at do variable diameter connection processing, top reducer pipe can Gathered so that latent heat of phase change will be condensed, phase-change working substance can be in external high temperature ground and internal next stage warm in the perimetrical lumen of bottom end Working medium evaporation is completed under the dual-heated of the condensation segment of pipe, can further improve heat transfer effect and efficiency of heat pipes, the heat of absorption It is not transferred to outside system when being radiated, the ground temperature of depth where being absorbed when heat absorption simultaneously, therefore the system can be high Effect is extracted deep geothermal heat and is used for surface structures.
Detailed description of the invention
Fig. 1 is the overall structure diagram of heat pipe described in present example.
Fig. 2 is the schematical top view of heat pipe described in present example.
Fig. 3 is the bottom schematic view of heat pipe described in present example.
Fig. 4 is the cross-sectional view of heat pipe and the transition of corresponding phase-change working substance described in present example.
Fig. 5 is the structural schematic diagram of system described in present example.
Wherein: 1 being heat exchanger, 2 be top heat pipe, 3 be relay heat pipe, 4 be bottom heat pipe, 5 be heat pump unit, 6 be water Pump, 7 be user, 8 be backfilling material, 9 be heat-conducting silicone grease, base circle heating section 10, middle part adiabatic section 11, top variable diameter connect Section 12, internal screw thread 13, heat-insulating material 14, external screw thread 15, phase-change working substance 16.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and It is not to limit.
Heat pipe is a kind of heat transfer element, using Natural Circulation and gravity, can not apply extraneous driving energy The carrying of heat is realized in the case where source.And according to heat transfer theory and latent heat of phase change size it is found that the working medium in gravity assisted heat pipe Phase transformation will discharge big energy, improve the coefficient of heat transfer and heat transfer efficiency.Therefore hot pipe technique is led in Energy extraction and industry Domain is widely applied, and by charging appropriate working fluids heating pipe is intracavitary, its phase-change characteristic and gravity is utilized to realize heat Amount transfer.
The present invention is a kind of interior heating system that underground heat is extracted using more piece relay hot tube high-efficiency, utilizes more piece relay heat Pipe coupled heat exchanger 1 extracts deep geothermal heat energy, then promotes energy grade by the heat pump unit 5 of ground as building heating.Work In the process, geothermal gradient calculates the operation temperature area of every economizer tube under base area, so that operation temperature area and phase-change working substance physical property be joined Number is matched, and to be perfused phase-change working substance corresponding with place warm area inside every economizer tube, cycle fluid is in bottom when use Annulus is heated, undergoes phase transition rear working substance steam and rises in adiabatic section in pipe, and on top, variable diameter condenses phase change region heat release, Condensation working medium returns to bottom space and continues cycling through later.Top first segment heat pipe cold coagulates phase change region and couples with heat exchanger 1, leads to Heat transferring medium is crossed by heat extraction and is delivered to heat pump unit 5, is used after promoting grade.The system is followed certainly using gravity assisted heat pipe Ring property reduces the circulation power consumption of deep geothermal heat energy extraction element, while special-shaped connection processing is done at more piece Heat pipe joint, can be Solve the problems, such as that the too long promotion resistance of tube side is excessive while improving heat transfer effect, therefore the system can with high efficiency extraction deep layer Heat is used for surface structures.
System of the present invention, as shown in Figure 5 comprising heat exchanger 1, top heat pipe 2, relay heat pipe 3, bottom heat pipe 4, Backfilling material 8, heat-conducting silicone grease 9 and heat pump unit 5, water pump 6, user 7;And top heat pipe 2, relay heat pipe 3 and bottom heat pipe 4 it Between mutually embedding company.
Phase-change working substance 16, the bottom heat pipe are filled among the top heat pipe 2, relay heat pipe 3 and bottom heat pipe 4 4 are connected with relay heat pipe 3, are connected after more piece relay heat pipe 3 with top heat pipe 2;Top heat pipe 2 and 1 company of coupling of heat exchanger It connects.Top heat pipe 2, relay heat pipe 3 pass through variable diameter between bottom heat pipe 4 and are threadedly coupled, and heat-conducting silicone grease 9, and heat is arranged in junction Tube top face linkage section shape can be convex cylindric or convex round table-like, recessed cylindric, recessed round table-like, bottom surface linkage section with Top surface is kept in the same direction, i.e., variable diameter linkage section and annular heating section coaxial arrangement in this preferred embodiment.
The heat exchanger 1 is connected with heat pump unit 5, and heat pump unit 5 is connected to be formed with user by pipeline and water pump 6 Circuit heating.
During the method is worked through the invention, geothermal gradient calculates the work of every economizer tube under base area Make warm area, to operation temperature area be matched with phase-change working substance physical parameter, to be perfused with and place temperature inside every economizer tube The corresponding phase-change working substance in area, the corresponding phase-change working substance, which first absorbs heat from the bottom evaporating area of place heat pipe, to be evaporated, and is then existed Middle part adiabatic section rises, and is finally back to bottom evaporating area through middle part after the condensation of top condensing zone and forms heat conductive circulation.
The heat pipe, as shown in Fig. 1,2,3 and Fig. 4, the corresponding phase-change working substance 16 is first from the bottom of place heat pipe Annular 10 interior suction thermal evaporation of heating section, then rises in middle part adiabatic section 11, finally condenses in top variable diameter linkage section 12 It is back in base circle heating section 10 by middle part adiabatic section 11 and forms heat conductive circulation;Wherein, in base circle heating section 10 It is provided with internal screw thread 13, the evaporation of corresponding phase-change working substance is the evaporator section of entire heat pipe;Middle part adiabatic section 11 uses heat-insulating material 14 are made, and the state of corresponding phase-change working substance is kept, and are the adiabatic section of entire heat pipe;It is provided with outside top variable diameter linkage section 12 outer Screw thread 15, the condensation of corresponding phase-change working substance are the condensation segment of entire heat pipe.
In use, the phase-change working substance of circulation is heated in the bottom of bottom heat pipe 4 first, rear working substance steam is undergone phase transition the bottom of at Rise in adiabatic section in portion's heat pipe 4, in bottom, 4 top variable diameter linkage section of heat pipe condenses phase change region heat release to relay heat pipe 3, The bottom space that condensation working medium returns to bottom heat pipe 4 later continues cycling through.Working medium is heated in 3 bottom circumferential region of relay heat pipe, It undergoes phase transition rear steam to rise, equally condenses phase change region heat release to upper level relay heat pipe 3 in top variable diameter linkage section.Through Repeatedly transmitting is crossed, heat is conducted to top layer, and top heat pipe 2 condenses phase change zone and couples with heat exchanger 1, and the heat exchange of heat exchanger 1 is situated between Matter is by heat extraction and is delivered to heat pump unit 5 and provides heat for unit, after promoting grade, secondary side medium by pipeline send to User uses.Secondary side medium returns to unit and constantly recycles after user's use.Specifically, in every economizer tube The phase-change working substance of portion's perfusion is according to warm area where heat pipe, using in acetone, methanol, water, nanomaterial solution and mix refrigerant One kind.For example, acetone, water or methanol can be used in the phase-change working substance in heat pipe when warm area is 20 DEG C to 50 DEG C where heat pipe, fit It should be in worst cold case;For nano material and mix refrigerant, can be deployed as desired.
Heat pipe of the present invention is the gravity assisted heat pipe vacuumized, to be led to using gravity assisted heat pipe natural circulation characteristic Cross the extraction that setting multi-stage relay heat pipe completes deep geothermal heat energy using phase-change working substance.
The present invention has carried out the setting of variable diameter screw thread on relay heat pipe top and bottom end, has both met the company between multi-stage heat pipe Requirement is connect, the reduced diameter portion on top can concentrate release condensation latent heat of phase change, and the ring part of bottom end can allow phase-change working substance to the greatest extent may be used It can be in contact with heat source, improve heat exchange efficiency.
The present invention carries out the second lift of heat quality using heat pump unit after the extraction for carrying out geothermal energy, meets The demand of building heat supplying.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention Protection scope within.

Claims (8)

1. it is a kind of using more piece relay hot tube high-efficiency extract underground heat interior heating system, which is characterized in that including along axial direction according to It is secondary mutually it is embedding be connected with the top heat pipe (2), relay heat pipe (3) and bottom heat pipe (4) set in underground, coupled with top heat pipe (2) The heat pump unit (5) that the heat exchanger (1) of heat is extracted in connection and input terminal is connect with heat exchanger (1), heat pump unit (5) Output end, which is connected by pipeline and water pump (6) with user (7), is formed into a loop heating;
The bottom heat pipe (4) is connected with relay heat pipe (3) coupling, after more piece relay heat pipe (3) coupling is connected and pushes up Portion's heat pipe (2) coupling is connected;The variable diameter linkage section that the top of heat pipe diametrically reduces, middle part are adiabatic section, and lower hollow is formed Annular heating section, variable diameter linkage section can be embedded in cooperation in annular heating section;It is perfused with inside every economizer tube and place warm area Corresponding phase-change working substance, the first base circle heating section interior suction thermal evaporation from place heat pipe of corresponding phase-change working substance, after And rise in the adiabatic section of middle part, finally in the variable diameter linkage section of top condense after through middle part adiabatic section be back to base circle by Heat conductive circulation is formed in hot arc.
2. a kind of interior heating system for extracting underground heat using more piece relay hot tube high-efficiency according to claim 1, special Sign is, is arranged outside variable diameter linkage section in screw thread, and annular heating section hollow wall is arranged in screw thread.
3. a kind of interior heating system for extracting underground heat using more piece relay hot tube high-efficiency according to claim 1, special Sign is, heat-conducting silicone grease (9) are arranged on the connecting end surface of variable diameter linkage section and annular heating section.
4. a kind of interior heating system for extracting underground heat using more piece relay hot tube high-efficiency according to claim 1, special Sign is that variable diameter linkage section presents dome column or convex round table-like;The central area of corresponding annular heating section is in recessed circle Column is recessed round table-like, variable diameter linkage section and annular heating section coaxial arrangement.
5. a kind of interior heating system for extracting underground heat using more piece relay hot tube high-efficiency according to claim 1, special Sign is that top heat pipe (2), relay heat pipe (3) and the bottom heat pipe (4) of underground setting are external to be respectively arranged backfilling material (8).
6. a kind of building heating method for extracting underground heat using more piece relay hot tube high-efficiency, which is characterized in that be based on claim System described in 1-5 any one, includes the following steps,
Step 1, the base circle heating section of bottom heat pipe (4) is heated, and the phase-change working substance in bottom heat pipe (4) undergoes phase transition rear work Matter steam rises in the adiabatic section in bottom heat pipe (4), and in bottom, heat pipe (4) top variable diameter linkage section condenses phase change region To relay heat pipe (3), the base circle heating section that condensation phase change working medium returns to bottom heat pipe (4) later is continued cycling through for heat release;
Step 2, the base circle heating section of relay heat pipe (3) is heated, and the phase-change working substance in relay heat pipe (3) undergoes phase transition rear work Matter steam rises in the adiabatic section in relay heat pipe (3), condenses phase change region in relay heat pipe (3) top variable diameter linkage section Heat release to upper level relay heat pipe (3), later condensation phase change working medium return to the base circle heating section of this grade of relay heat pipe (3) after Continuous circulation;
Step 3, by the multiple transmitting of multi-stage relay heat pipe (3), heat is conducted to top layer, the phase transformation in top heat pipe (2) Working medium undergoes phase transition rear working substance steam and rises in the adiabatic section in top heat pipe (2), and at top, heat pipe (2) top variable diameter is connected I.e. condensation phase change region heat release is to the heat exchanger (1) of coupling for section, and condensation phase change working medium returns to the bottom of this grade of relay heat pipe (3) later Portion's annular heating section continues cycling through;
Step 4, the heat transferring medium of heat exchanger (1) by heat extraction and is delivered to heat pump unit (5) and provides heat for unit, is promoted After grade, secondary side medium send to user by pipeline and uses;Secondary side medium returns to unit and continuous after user's use It is recycled.
7. a kind of building heating method for extracting underground heat using more piece relay hot tube high-efficiency according to claim 6, special Sign is that the variable diameter linkage section of heat pipe condenses latent heat of phase change to the annular heating section of cooperation from inner integrated release, and annular is heated The external ground temperature for absorbing corresponding depth of section.
8. a kind of building heating method for extracting underground heat using more piece relay hot tube high-efficiency according to claim 6, special Sign is that the phase-change working substance being perfused inside every economizer tube is according to warm area where heat pipe, using acetone, methanol, water, nanometer material Expect one of solution and mix refrigerant.
CN201910270579.6A 2019-04-04 2019-04-04 A kind of interior heating system and method extracting underground heat using more piece relay hot tube high-efficiency Pending CN110017528A (en)

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CN112032814A (en) * 2020-09-11 2020-12-04 刘学亮 Spider-web type heating device based on geothermal energy
CN112997764A (en) * 2021-03-01 2021-06-22 中国科学院广州能源研究所 High-temperature mine comprehensive transformation and utilization system combining super-long gravity heat pipe heat extraction and temperature control
WO2022037358A1 (en) * 2020-08-18 2022-02-24 哈尔滨工业大学(深圳) Heat pipe and geothermal energy collection device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022037358A1 (en) * 2020-08-18 2022-02-24 哈尔滨工业大学(深圳) Heat pipe and geothermal energy collection device
CN112032814A (en) * 2020-09-11 2020-12-04 刘学亮 Spider-web type heating device based on geothermal energy
CN112997764A (en) * 2021-03-01 2021-06-22 中国科学院广州能源研究所 High-temperature mine comprehensive transformation and utilization system combining super-long gravity heat pipe heat extraction and temperature control

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Application publication date: 20190716