CN112212530B - A gravity-driven indirect heat extraction system for mid-deep geothermal fluid - Google Patents
A gravity-driven indirect heat extraction system for mid-deep geothermal fluid Download PDFInfo
- Publication number
- CN112212530B CN112212530B CN202011167764.1A CN202011167764A CN112212530B CN 112212530 B CN112212530 B CN 112212530B CN 202011167764 A CN202011167764 A CN 202011167764A CN 112212530 B CN112212530 B CN 112212530B
- Authority
- CN
- China
- Prior art keywords
- heat
- subsystem
- working medium
- taking
- gravity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 32
- 230000005484 gravity Effects 0.000 title claims abstract description 31
- 238000000605 extraction Methods 0.000 title claims description 11
- 230000001174 ascending effect Effects 0.000 claims abstract description 36
- 238000004321 preservation Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000009835 boiling Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 10
- 239000007791 liquid phase Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000012071 phase Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/17—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using tubes closed at one end, i.e. return-type tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T50/00—Geothermal systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a gravity-driven medium-deep geothermal fluid indirect heat taking system, which comprises an indirect heat taking subsystem and a heat using subsystem; the indirect heat taking subsystem is a closed loop system and comprises a descending heat preservation section, a throttle valve, an ascending heat exchange section, an ascending heat preservation section and a valve, wherein low-boiling-point working media contained in the indirect heat taking subsystem circularly flow under the driving of gravity; the flow and the pressure of the working medium are regulated and controlled through the regulation of the opening of the throttle valve; the bypass pressurizing subsystem is arranged, and higher heating temperature and load can be provided through the working intervention of the compressor; the heat subsystem is connected with the indirect heat taking subsystem through the dividing wall type heat exchanger, and the circulating water pump drives hot water to circulate between the heat exchanger and a heat user, so that the hot water absorbs heat from the heat exchanger and releases heat to the heat user. The system realizes 'no water taking during heat taking' in the development and utilization of the geothermal energy in the middle and deep layers, and the working medium with low boiling point can be completely circulated by gravity driving, so that the heat taking without power consumption is realized.
Description
Technical Field
The invention belongs to the technical field of geothermal energy development and utilization, and particularly relates to a gravity-driven middle-deep geothermal fluid indirect heat taking system.
Background
Geothermal energy is clean renewable energy, the current geothermal development technology mostly pumps geothermal fluid to the ground for heat utilization, and if the geothermal fluid is not recharged, the geothermal fluid is directly discharged to cause heat pollution and chemical pollution, so that the problems of ground water level drop, ground subsidence and the like are caused for a long time; if recharging is adopted, the problems of high recharging difficulty, high recharging energy consumption, easiness in heat storage and cooling and the like are also caused. There is a need for a low energy-consumption indirect geothermal energy heat-taking technology that does not take water.
Disclosure of Invention
The invention aims to solve the problems and provide a gravity-driven medium-deep geothermal fluid indirect heat taking system, wherein circulating working medium in the system performs dividing wall type heat exchange with geothermal fluid to realize 'no water is taken during heat taking', so that a series of problems caused by extracting geothermal water are avoided; meanwhile, the working medium generates pressure difference under the action of gravity, and the zero-consumption circulating flow of the working medium can be realized.
In order to achieve the above object, the present invention adopts the following technical scheme.
A gravity-driven medium-deep geothermal fluid indirect heat taking system comprises an indirect heat taking subsystem and a heat using subsystem, wherein the indirect heat taking subsystem is arranged in a geothermal well; the indirect heat taking subsystem is a closed loop system and comprises a descending heat preservation section, a throttle valve, an ascending heat exchange section, an ascending heat preservation section and a valve, wherein low-boiling-point working media are contained in the indirect heat taking subsystem, flow downwards along the descending heat preservation pipe after being condensed into a liquid state by the heat exchanger and are enriched into liquid levels with certain heights, the liquid-phase working media form high pressure in front of the throttle valve under the action of gravity, flow into the ascending heat exchange section to absorb heat from geothermal fluid and gasify after being depressurized and cooled by the throttle valve, and the gas-phase working media after heat absorption flow into the heat exchanger along the ascending heat preservation section to release heat to the heat using subsystem and condense to form a cycle; the opening of the throttle valve can be adjusted, and the flow and the pressure of the working medium are regulated and controlled through the adjustment of the opening; the heat utilization subsystem is connected with the indirect heat taking subsystem through the dividing wall type heat exchanger, and the circulating water pump drives hot water to circulate between the heat exchanger and a heat user, so that heat absorption of the hot water from the heat exchanger and heat release of the hot water to the heat user are realized.
On the basis of the technical scheme, the invention can be improved as follows.
Further, a bypass pressurizing subsystem is arranged above the gravity-driven middle-deep geothermal fluid indirect heat-taking system, and an inlet and an outlet of the bypass pressurizing subsystem are respectively communicated with two sides of a valve of the heat-taking subsystem; the compressor does not work under the conventional working condition, and the valve of the heat taking system is in an open state; when the heating temperature or load of the system is lower than the requirement, the valve is closed, the compressor is started, and the heating temperature and the heating load are increased.
Further, the gravity-driven medium-deep geothermal fluid indirect heat-taking system is provided with a working medium charging tank/recovering subsystem, wherein the working medium charging tank/recovering subsystem comprises a working medium tank, a four-way valve, a compressor and a stop valve, an air inlet of the four-way valve is connected with an air outlet of the compressor, an air outlet of the four-way valve is connected with an air inlet of the compressor, two working ports are respectively connected with the working medium tank and the heat-taking subsystem, and the working medium charging tank and the working medium recovering are realized through the switching of the four-way valve; the working medium charging tank/recycling subsystem can supplement working medium leaked by the indirect heat taking system and can recycle redundant working medium according to load requirements; a stop valve is arranged between the four-way valve and the heat taking system, and the stop valve is closed in a non-working period of the working medium charging/recycling subsystem.
In the gravity-driven type indirect heat taking system for deep geothermal fluid, the indirect heat taking subsystem is a U-shaped tubular closed loop.
In the gravity-driven middle-deep geothermal fluid indirect heat-taking system, the descending heat-preserving section and the ascending heat-preserving section of the indirect heat-taking subsystem are heat-preserving pipelines made of polyurethane materials.
In the gravity-driven intermediate-depth geothermal fluid indirect heat-taking system, the ascending heat-exchanging section of the indirect heat-taking subsystem can be set into a single heat-exchanging pipe or a plurality of groups of parallel heat-exchanging pipes, and parameters such as the quantity, the pipe diameter, the length and the like are determined according to the heat load requirement and the local heat resource condition; the heat exchange section is made of high heat conduction metal, and the outer wall is coated with an anti-corrosion heat conduction coating to slow down wall corrosion; the depth of the buried pipe of the ascending heat exchange section is 1000-6000 m, the depth of the upper end of the buried pipe is determined according to the heat supply temperature requirement and the local geothermal resource, and preferably, the geothermal fluid temperature at the upper end of the buried pipe is 5-10 ℃ higher than the heat supply temperature.
In the gravity-driven medium-deep geothermal fluid indirect heat taking system, the low-boiling-point working medium in the tank filling in the indirect heat taking subsystem is pure working medium or non-azeotropic mixed working medium.
Compared with the prior art, the invention has the advantages that:
(1) The system realizes 'no water taking after heat taking' in the development and utilization of the geothermal energy in the middle-deep layer, and avoids the problems of high energy consumption, serious pollution and the like caused by extracting groundwater;
(2) Through reasonable design, gravity driving type working medium circulation flow is realized, and energy consumption in a heat extraction process is reduced;
(3) The underground heat taking and overground heat releasing processes of the low-boiling-point working medium are all phase change processes, so that the heat exchange is enhanced and the heat exchange efficiency is improved;
(4) The control of the heat supply temperature and the load can be realized through the opening degree control of the throttle valve; by intervention of the bypass boost system, higher heating temperatures and loads can be provided.
Drawings
FIG. 1 is a schematic diagram of a geothermal energy extraction device according to the present invention;
the figure shows:
1. the indirect heat taking subsystem 2, the bypass pressurizing subsystem 3, the heat using subsystem 4, the working medium charging tank/recycling subsystem 11, the descending heat preservation section 12, the throttle valve 13, the ascending heat exchange section 14, the ascending heat preservation section 15, the valve 31, the heat exchanger 32, the circulating water pump 33, the heat user 41, the working medium tank 42, the four-way valve 43, the compressor 44 and the stop valve.
Detailed Description
The invention is further described below with reference to the drawings and examples. It is obvious that the described embodiment is only one of the preferred embodiments of the present invention, and the present invention is not limited to the disclosed embodiments, and all the simple modifications and variations made to the following examples according to the technical facts of the present invention are within the scope of protection of the present invention.
As shown in fig. 1, the gravity-driven medium-deep geothermal fluid indirect heat-taking system comprises an indirect heat-taking subsystem 1 arranged in a geothermal well, wherein the indirect heat-taking subsystem is a closed loop system, and low-boiling-point working media contained in the indirect heat-taking subsystem comprises a descending heat-preserving section 11, a throttle valve 12, an ascending heat-exchanging section 13 and an ascending heat-preserving section 14; the bypass pressurizing subsystem is connected above the heat taking subsystem in parallel, and the inlet and the outlet of the bypass pressurizing subsystem are respectively communicated with the two sides of the valve 15 of the heat taking subsystem; a heat utilization subsystem 3 is arranged behind the bypass pressurizing subsystem outlet, and the heat utilization subsystem 3 is connected with the heat extraction subsystem through a dividing wall type heat exchanger 31; the working medium charging tank/recycling subsystem is connected above the descending heat preservation section, supplements working medium leaked by the indirect heat taking system, and can recycle redundant working medium according to load requirements.
The low boiling point working medium realizes the following circulation in a closed loop: after the heat exchanger 31 is condensed into a liquid state, the liquid phase working medium flows downwards along the descending heat preservation pipe and is enriched to form a high liquid level, the liquid phase working medium forms high pressure in front of the throttle valve 12 under the action of gravity, the liquid phase working medium flows into the ascending heat exchange section 13 to absorb heat from geothermal fluid and gasify after being decompressed and cooled by the throttle valve 12, and the gas phase working medium after heat absorption flows into the heat exchanger 31 along the ascending heat preservation section 14 to release heat to a heat utilization subsystem and is condensed to form a cycle; the opening of the throttle valve 12 can be adjusted, and the flow and the pressure of the working medium are regulated and controlled through the adjustment of the opening; the circulating water pump 32 of the heat subsystem 3 is used for driving hot water to circulate between the heat exchanger 31 and the heat user 33, so that the heat absorption of the circulating water from the heat exchanger and the heat release to the heat user are realized; the saturation boiling point of the low-boiling-point working medium under the heat absorption working condition is not higher than the temperature of the geothermal fluid, and preferably, the evaporation temperature of the working medium under the heat absorption working condition is 60-100 ℃.
Taking the geothermal energy extracted from a geothermal well with a depth of 3000-4000 m as an example, according to the analysis, the heat extraction system is set as a U-shaped closed loop, the lower part of the descending heat preservation section is buried with a depth of 3500 m, the ascending heat exchange section is 1500 m long, the upper part of the heat exchange section is buried with a depth of 2000 m, the upper part of the ascending heat exchange section is connected with an ascending heat preservation pipe, and the length of the ascending heat preservation pipe is about 2000 m; the temperature of 2000 m depth in the geothermal well is about 70-80 ℃, the low boiling point working medium absorbs heat in the ascending heat exchange section and approaches to the temperature of geothermal fluid outside the upper part of the heat exchange section, and then flows to the heat exchanger along the ascending heat preservation section to condense and release heat to the heat utilization subsystem; the ascending heat preservation section and the descending heat preservation section are made of polyurethane heat preservation materials, the ascending heat preservation section prevents high-temperature gasified low-boiling point working medium from exchanging heat with fluid with lower temperature at the upper part in the geothermal well, the phenomenon of condensation reflux in the ascending pipe is avoided, and heat loss is reduced; the descending heat preservation section prevents condensed liquid phase working medium from absorbing heat and gasifying from the geothermal fluid, and ascending convection heat exchange and gas phase high pressure are formed in the descending pipe, so that the consistency of the circulation direction of the working medium in a closed loop is ensured; the ascending heat preservation section can be made of metal materials with higher heat conductivity coefficient, such as copper, and the outer surface of the ascending heat preservation section is coated with an anti-corrosion heat conduction coating, so that the ascending heat preservation section can be arranged into a single heat exchange pipe or a plurality of groups of parallel heat exchange pipes, and a sufficient heat exchange area is provided to ensure the heat supply temperature and the heat load.
According to the change of heat supply temperature and load demand of heat users, the gravity-driven type medium-deep geothermal fluid indirect heat taking system can be divided into a conventional mode and a high-load mode.
Normal mode: the condensing temperature and the heat release amount of the low-boiling-point working medium in the heat exchanger completely meet the requirements of heat users, the bypass pressurization system does not work, the valve 15 is in an open state, and the low-boiling-point working medium completely generates natural circulation flow under the pressure difference caused by gravity: the condensed liquid phase working medium flows downwards along the descending heat preservation section under the action of gravity and is enriched to form a certain height liquid level, the working medium in front and behind the throttle valve 12 has a liquid level difference, under the action of the pressure difference, the liquid phase working medium flows into the ascending heat absorption section after throttling, and then flows into the heat exchanger along the ascending heat preservation section under the action of gravity after the heat absorption section is completely gasified; after full heat exchange, the temperature of the working medium at the inlet of the rising heat preservation section reaches 70 ℃, the heat dissipation loss of the rising heat preservation section is ignored, the temperature of the inlet of the heat exchanger heat taking system is regarded as 70 ℃, the temperature of the heat exchanger end is differentiated by 5 ℃, and the heat supply temperature of the heat using system is 65 ℃; the opening of the throttle valve 12 is regulated, so that the mass flow of the working medium can be regulated and controlled within a certain range, and the heat supply temperature and load are changed; in this mode of operation, the heat extraction process of the heat extraction system does not require additional work.
High load mode: when the opening degree of the regulating throttle valve 12 does not meet the heat consumption temperature and load, the bypass supercharging system is in intervention work, the valve 15 is closed, the compressor is started, higher temperature, higher pressure and higher flow are generated in the heat exchanger under the action of the compressor, according to the analysis, the heat supply temperature of the heat consumption system is higher than 65 ℃ and is related to the working condition of the compressor, the compressor can adopt a variable frequency operation mode, the higher input power can obtain higher heat supply temperature and load, and the outlet temperature of the compressor is preferably 75-85 ℃; in this mode of operation, the compressor of the heat extraction system requires power.
In the scheme, a working medium charging tank/recycling subsystem 4 is further arranged, an air inlet of a four-way valve 42 is connected with an air outlet of a compressor 43, the air outlet of the four-way valve 42 is connected with the air inlet of the compressor 43, two working ports of the four-way valve 42 are respectively connected with a working medium tank 41 and a descending heat preservation section of a heat extraction subsystem, and a stop valve 44 is arranged between the four-way valve 42 and the descending heat preservation section 11; the working medium charging/recycling subsystem is in a non-working period, and the stop valve is in a closed state; when the working medium in the tank is filled, the stop valve is opened, the four-way valve is regulated and controlled, the exhaust port of the compressor is communicated with the heat taking subsystem, the air suction port of the compressor is communicated with the working medium tank, the compressor works, and the working medium flows into the heat taking subsystem from the working medium tank; when the working medium is recovered, the stop valve is opened, the four-way valve is regulated and controlled, the exhaust port of the compressor is communicated with the working medium tank, the air suction port of the compressor is communicated with the heat taking subsystem, the compressor works, and the working medium flows into the working medium tank from the heat taking subsystem.
The present invention is not limited to the preferred embodiments, but can be modified in any way according to the technical principles of the present invention, and all such modifications, equivalent variations and modifications are included in the scope of the present invention.
The invention realizes 'no water taking during heat taking' in the development and utilization of the middle-deep geothermal energy, and avoids the problems of high energy consumption, serious pollution and the like caused by extracting groundwater; through reasonable design, the low-boiling point working medium circularly flows under the drive of gravity, so that the heat extraction without power consumption is realized; the control of the heat supply temperature and the load can be realized through the opening degree control of the throttle valve; by the intervention of the bypass pressurizing system, higher heating temperature and load can be provided; has wide application prospect in the clean and low-consumption development and utilization of geothermal energy.
Claims (6)
1. The gravity-driven medium-deep geothermal fluid indirect heat taking system is characterized by comprising an indirect heat taking subsystem (1), a bypass pressurizing subsystem (2), a heat using subsystem (3) and a working medium charging/recycling subsystem (4); the indirect heat taking subsystem is a closed loop system, and low-boiling-point working media are contained in the indirect heat taking subsystem; the bypass pressurizing subsystem is connected in parallel with the upper part of the indirect heat taking subsystem; the heat utilization subsystem is positioned below the bypass pressurizing subsystem in the flowing direction of the working medium, and the heat exchange between the heat utilization subsystem and the indirect heat taking subsystem is realized through the connection of the dividing wall type heat exchanger; the working medium charging/recycling subsystem is communicated with the indirect heat taking subsystem, so as to realize charging and recycling of working medium;
The indirect heat-taking subsystem (1) can be set into a U-shaped tubular closed loop, and comprises a descending heat-preserving section (11), a throttle valve (12), an ascending heat-exchanging section (13), an ascending heat-preserving section (14) and a valve (15); the circulation process of the low boiling point working medium in the loop is as follows: after the heat exchanger (31) is condensed into a liquid state, the liquid phase working medium flows downwards along the descending heat preservation section, forms high pressure in front of the throttle valve (12) under the action of gravity, and flows into the ascending heat exchange section (13) to absorb heat from geothermal fluid and gasify after the liquid phase working medium is decompressed and cooled by the throttle valve (12), and the gas phase working medium after heat absorption flows into the heat exchanger (31) along the ascending heat preservation section (14) to release heat to the heat utilization subsystem and is condensed, so that a cycle is formed;
The bypass pressurizing subsystem (2) comprises a first compressor and a bypass pipeline, an inlet and an outlet of the bypass pressurizing subsystem are respectively communicated with two sides of an indirect heat taking subsystem valve (15), the valve (15) is in a closed state when the first compressor works, and the rest period of time is opened;
The working medium charging tank/recycling subsystem (4) comprises a working medium tank (41), a four-way valve (42), a second compressor (43) and a stop valve (44), wherein an air inlet of the four-way valve (42) is connected with an air outlet of the second compressor (43), an air outlet of the four-way valve (42) is connected with an air inlet of the second compressor (43), two working ports of the four-way valve (42) are respectively connected with one end of the working medium tank (41) and one end of the stop valve (44), and the other end of the stop valve (44) is connected with a descending heat preservation section (11) of the heat taking subsystem;
the opening of the throttle valve (12) can be adjusted, and the flow and the pressure of the working medium can be regulated and controlled through the change of the opening.
2. The gravity-driven medium-deep geothermal fluid indirect heat taking system according to claim 1, wherein the heat utilization subsystem (3) comprises a heat exchanger (31), a circulating water pump (32) and a heat user (33), and the circulating water pump (32) drives hot water to circulate between the heat exchanger and the heat user, so that heat absorption of the hot water from the heat exchanger (31) and heat release of the hot water to the heat user (33) are realized.
3. The gravity-driven type indirect heat taking system for middle-deep geothermal fluid according to claim 1, wherein the descending heat preservation section (11) and the ascending heat preservation section (14) are heat preservation pipes made of polyurethane materials.
4. The gravity-driven medium-deep geothermal fluid indirect heat extraction system according to claim 1, wherein the ascending heat exchange section (13) can be configured as a single heat exchange tube or a plurality of parallel heat exchange tubes, and the number, tube diameter, length and other parameters are determined according to the heat load requirement and the local heat resource condition.
5. Gravity-driven medium-deep geothermal fluid indirect heating system according to claim 1, characterized in that the depth of the buried pipe of the rising heat exchange section (13) is 1000-6000 m.
6. The gravity-driven medium-deep geothermal fluid indirect heat taking system according to claim 1, wherein the low boiling point working medium is a pure working medium or a non-azeotropic mixed working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011167764.1A CN112212530B (en) | 2020-10-28 | 2020-10-28 | A gravity-driven indirect heat extraction system for mid-deep geothermal fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011167764.1A CN112212530B (en) | 2020-10-28 | 2020-10-28 | A gravity-driven indirect heat extraction system for mid-deep geothermal fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112212530A CN112212530A (en) | 2021-01-12 |
| CN112212530B true CN112212530B (en) | 2024-11-26 |
Family
ID=74057199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011167764.1A Active CN112212530B (en) | 2020-10-28 | 2020-10-28 | A gravity-driven indirect heat extraction system for mid-deep geothermal fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112212530B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12274977B1 (en) * | 2024-03-15 | 2025-04-15 | AirMyne, Inc. | Carbon dioxide removal systems using a geothermal heat source |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212431377U (en) * | 2020-10-28 | 2021-01-29 | 山东理工大学 | A gravity-driven mid-deep geothermal fluid indirect heat extraction system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0830637B2 (en) * | 1992-11-24 | 1996-03-27 | 株式会社フジクラ | Loop heat pipe |
| CN104034074A (en) * | 2014-06-18 | 2014-09-10 | 西安交通大学 | Geothermal energy development system with power-assisted giant heat pipes |
| CN107144035B (en) * | 2017-05-16 | 2019-06-28 | 中国科学院广州能源研究所 | A kind of regulatable loop heat pipe formula underground heat mining system of working medium circulation flow |
| CN110030746B (en) * | 2019-04-23 | 2020-05-26 | 中国科学院广州能源研究所 | Stepped gravity heat pipe geothermal exploitation system without effusion effect |
| CN211177029U (en) * | 2019-11-28 | 2020-08-04 | 陕西省煤田地质集团有限公司 | Heating system with mode of taking heat and not taking water by using geothermal energy in middle and deep layers |
-
2020
- 2020-10-28 CN CN202011167764.1A patent/CN112212530B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212431377U (en) * | 2020-10-28 | 2021-01-29 | 山东理工大学 | A gravity-driven mid-deep geothermal fluid indirect heat extraction system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112212530A (en) | 2021-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103292486B (en) | Single-tank/double-tank combined heat accumulation system for solar thermal power generation, and heat accumulation method of single-tank/double-tank combined heat accumulation system | |
| CN102538524A (en) | Loop gravity-assisted heat pipe heat transfer device | |
| CN102519288A (en) | Method for transporting energy of gas-liquid two-phase flow | |
| CN108019983A (en) | New type solar energy list tank phase-change heat storage absorption heat pump | |
| CN116031913A (en) | A wind power consumption energy storage system based on Carnot battery energy storage technology | |
| CN112984847B (en) | Hydrothermal geothermal comprehensive utilization system and energy distribution pipe control method | |
| CN214333087U (en) | Heat pipe type middle-deep geothermal heat development device with self-circulation function | |
| CN105257354B (en) | The cold and hot pneumoelectric new energy resources system of wind light mutual complementing of compressed-air energy storage | |
| CN112212530B (en) | A gravity-driven indirect heat extraction system for mid-deep geothermal fluid | |
| CN113566632B (en) | Stepped heat storage temperature control system and temperature control method based on phase change energy storage technology | |
| CN115013220B (en) | Compact geothermal energy compressed air energy storage system and method based on medium-deep dry-hot rock | |
| CN212081701U (en) | Step heat accumulation temperature control system based on phase change energy storage technology | |
| Huang et al. | A novel independent heat extraction-release double helix energy pile: Numerical and experimental investigations of heat extraction effect | |
| CN106481522A (en) | A kind of enclosed helium turbine tower-type solar thermal power generating system with accumulation of heat | |
| CN212431377U (en) | A gravity-driven mid-deep geothermal fluid indirect heat extraction system | |
| CN106352603A (en) | Ground source heat exchanger partitioned classification management system | |
| CN204152569U (en) | A kind of air energy power-generating system | |
| CN219607807U (en) | High-temperature phase-change heat storage and release device and solar photo-thermal power generation system comprising same | |
| CN207317299U (en) | A kind of sand heat reservoir | |
| CN207778863U (en) | New type solar energy list tank phase-change heat storage absorption heat pump | |
| CN115711496A (en) | Direct-expansion type underground heat exchanger for reinforced heat exchange of geothermal single well and heat exchange system | |
| CN115930651A (en) | High temperature phase change heat storage and release device | |
| CN117266954A (en) | Liquid carbon dioxide energy storage system | |
| CN101566364B (en) | Closed heating system used for oil fields | |
| CN110145783B (en) | High-power large-temperature-difference thermal utilization unit device for hydrothermal well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |