CN110864472A - Ground source heat pump heating system - Google Patents
Ground source heat pump heating system Download PDFInfo
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- CN110864472A CN110864472A CN201911172349.2A CN201911172349A CN110864472A CN 110864472 A CN110864472 A CN 110864472A CN 201911172349 A CN201911172349 A CN 201911172349A CN 110864472 A CN110864472 A CN 110864472A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T50/00—Geothermal systems
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- 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
Abstract
The invention discloses a ground source heat pump heating system, which comprises a heat exchanger in a middle-deep layer well and a heat exchange pipe in a shallow layer well; the middle-deep layer well heat exchanger is used for being placed in a middle-deep layer geothermal well; the shallow layer in-well heat exchange tube is used for being placed in a shallow layer geothermal well with the depth of a meter and used as an in-well heat exchange device of a shallow layer ground source heat pump heat supply system; the upper end of the middle-deep inner sleeve is communicated to the water inlet end of the heat exchange tube in the U-shaped shallow well through a first pipeline; the water outlet end of the U-shaped shallow layer well heat exchange tube is communicated to the upper part of an annular space between the outer side wall of the middle-deep inner sleeve and the inner side wall of the middle-deep outer sleeve through a second pipeline; a gate valve is arranged on the first pipeline or the second pipeline; the heat exchanger in the middle-deep layer well, the heat exchange tube in the shallow layer well, the first pipeline and the second pipeline are filled with liquid heat exchange media. The ground source heat pump heat supply system provided by the invention has the advantages that the application range of the shallow ground source heat pump heat supply system is enlarged, the environment is protected, the pollution is avoided, and the on-duty and the maintenance are not needed during the heat compensation operation.
Description
Technical Field
The invention relates to a heating technology, in particular to a ground source heat pump heating system.
Background
A shallow ground source heat pump heat supply system is a mature ground source heat pump heat supply technology, and utilizes a buried pipe of a shallow ground layer to extract heat of a stratum with the depth of 20-200 meters as a building heat supply heat source. The depth of the shallow buried pipe is 20-200 meters, the buried pipe belongs to a constant temperature layer, the temperature of the stratum is basically constant, and the buried pipe is not influenced by surface sunlight radiation and the heat in the earth. The shallow ground source heat pump heating system supplies heat in winter and takes heat from a constant temperature layer, and needs refrigeration operation in summer or other heat sources to supplement heat for the stratum after heat supply is finished so as to maintain stable underground temperature and ensure long-term operation of the heat pump system. Therefore, the shallow ground source heat pump heating system is mostly applied to buildings with the requirements of cold and warm at the same time in offices, businesses, schools and the like, and is suitable for cold areas with balanced cold and warm loads. In severe cold areas, areas with hot summer and cold winter and areas with hot summer and warm winter, the difference between heat taking and heat release in winter and summer is large because of unbalanced cold and heat demand, and the stability of underground temperature is not easy to guarantee. Residential buildings generally do not need centralized cooling, and the application of a shallow ground source heat pump heating system is limited. In some shallow ground source heat pump residential heating projects in northern severe cold areas, as a shallow ground source heat pump heating system continuously extracts heat from the ground without heat supplement, the underground temperature is gradually reduced year by year, and the projects fail.
The conventional heat supplementing mode of the shallow ground source heat pump heating system is beneficial to heat supplementing by using solar energy, heat supplementing by using a field air source heat pump and the like. The heating system of the shallow ground source heat pump has large heat acquisition amount, and needs to supplement enough heat, the area of the solar heat collector is large, the investment cost is high, the service life of the solar heat collector is limited, and the maintenance cost is high. The separately added field air source heat pump is used for supplementing heat for the shallow ground source heat pump heating system, the problem of high investment is also faced, the power distribution capacity is increased, and the running power consumption is high and cannot be compensated. The solar energy is utilized for heat compensation and the site air source heat pump is utilized for heat compensation, so that the investment, operation and maintenance costs are high, and the solar energy heat pump can only be used as an emergency remedy means.
A heat pump heating system of a middle-deep layer ground heat source is a new heating technology in recent years. A sleeve type heat exchanger structure is adopted, the drilling depth is 1500-3000 m, and deep geothermal heat is extracted to serve as a heat supply heat source. The middle-deep geothermal well adopts a heat exchange mode to obtain heat, so that deep underground water resources can be effectively protected. The heat of the deep geothermal energy comes from the inside of the earth, and the heat source is stable and can be used for a long time. The heat supply system of the heat pump of the middle-deep geothermal source has high efficiency, no emission and no pollution, but has high construction cost and is not suitable to be used as a heat supply source independently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a ground source heat pump heating system, which can greatly reduce the number of shallow ground source heat wells, can be applied to projects which only supply heat such as houses and the like, increases the application range of the shallow ground source heat pump heating system, can be applied to projects which supply heat in severe cold areas or which only supply heat, is green and pollution-free, and does not need to be attended and maintained during heat compensation operation.
In order to solve the technical problem, the ground source heat pump heating system provided by the invention comprises a heat exchanger 1 in a middle-deep well and a heat exchange tube 2 in a shallow well;
the heat exchanger 1 in the middle-deep well comprises a middle-deep outer sleeve 11 and a middle-deep inner sleeve 12;
the bottom end and the side wall of the middle-depth outer sleeve 11 are closed;
the middle-depth inner sleeve 12 is arranged in the middle-depth outer sleeve 11, and an opening at the bottom end of the middle-depth inner sleeve 12 is communicated with the bottom of the middle-depth outer sleeve 11;
the upper part of the outer side wall of the middle-deep inner sleeve 12 is closed with the upper part of the inner side wall of the middle-deep outer sleeve 11, and an annular space is formed between the outer side wall of the middle-deep inner sleeve 12 and the inner side wall of the middle-deep outer sleeve 11;
the heat exchange tube 2 in the shallow well is a U-shaped tube;
the heat exchanger 1 in the middle-deep-layer well is used for being placed in a middle-deep-layer geothermal well with the depth of 1500-3000 meters;
the shallow in-well heat exchange tube 2 is placed in a shallow geothermal well with the depth of 80-150 meters and is used as an in-well heat exchange device of a shallow ground source heat pump heating system;
the upper end of the middle-deep inner sleeve 12 is communicated to the water inlet end of the heat exchange tube 2 in the U-shaped shallow well through a first pipeline;
the water outlet end of the U-shaped shallow layer well heat exchange tube 2 is communicated to the upper part of an annular space between the outer side wall of the middle-deep inner sleeve 12 and the inner side wall of the middle-deep outer sleeve 11 through a second pipeline;
a gate valve 4 is arranged on the first pipeline or the second pipeline;
the heat exchanger 1 in the middle deep layer well, the heat exchange tube 2 in the shallow layer well, the first pipeline and the second pipeline are filled with liquid heat exchange media.
Preferably, the liquid heat exchange medium is water.
Preferably, the heat exchanger 1 in the middle-deep geothermal well is used for being placed in the middle-deep geothermal well with the depth of 2000-3000 meters.
Preferably, two ends of the gate valve 4 are communicated with a bypass pipeline;
and a heat supplementing circulating pump 3 is arranged in the bypass pipeline.
Preferably, a temperature sensor is arranged in the shallow geothermal well;
the temperature sensor is used for detecting the temperature in the shallow layer well at the position of the heat exchange tube in the shallow layer well.
Preferably, the heat exchanger 1 in the middle-deep layer well is used as an in-well heat exchange device of a heat pump heating system of a middle-deep layer geothermal source.
Preferably, the ratio of the heat supply capacities of the heat supply system of the middle-deep ground source heat pump and the heat supply system of the shallow ground source heat pump is 1:4 to 1: 1.
Preferably, the heat-compensating circulating pump 3 is a heat exchanger circulating pump of a medium-deep ground source heat pump heating system or a heat exchange pipe circulating pump of a shallow ground source heat pump heating system.
Preferably, the heat exchange tube 2 in the shallow well is made of polyethylene.
According to the ground source heat pump heat supply system, the heat exchanger 1 in the middle-deep layer geothermal well placed at the depth of 1500-3000 meters is used for supplying heat to the shallow layer ground source heat pump heat supply system, so that the number of the shallow layer geothermal wells can be greatly reduced, the shallow layer ground source heat pump heat supply system can be applied to a single heat supply project such as a house, the application range of the shallow layer ground source heat pump heat supply system is increased, and the shallow layer ground source heat pump heat supply system can be applied to a severe cold area or a single heat supply project; the natural circulation heat compensation can be carried out by means of the natural flow of the temperature density difference of the liquid heat exchange medium, the heat compensation function of the shallow ground source heat pump heating system is realized, electromechanical equipment such as a water pump and the like does not need to be started, and electricity consumption, zero consumption and zero emission are realized; the heat energy for heat supplement comes from a middle-deep geothermal well, is a clean renewable energy source, and is green and pollution-free; and the operation period of the concurrent heating is free from the need of watching and maintaining.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a ground source heat pump heating system according to the present invention.
Description of reference numerals:
1, a heat exchanger in a middle-deep well; 2, shallow layer heat exchange pipes in the well; 11 middle-deep outer sleeve; 12, a middle-deep inner sleeve; 4, a gate valve; 3 a heat-supplementing circulating pump.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the ground source heat pump heating system comprises a heat exchanger 1 in a middle-deep well and a heat exchange tube 2 in a shallow well;
the heat exchanger 1 in the middle-deep well comprises a middle-deep outer sleeve 11 and a middle-deep inner sleeve 12;
the bottom end and the side wall of the middle-depth outer sleeve 11 are closed;
the middle-depth inner sleeve 12 is arranged in the middle-depth outer sleeve 11, and an opening at the bottom end of the middle-depth inner sleeve 12 is communicated with the bottom of the middle-depth outer sleeve 11;
the upper part of the outer side wall of the middle-deep inner sleeve 12 is closed with the upper part of the inner side wall of the middle-deep outer sleeve 11, and an annular space is formed between the outer side wall of the middle-deep inner sleeve 12 and the inner side wall of the middle-deep outer sleeve 11;
the heat exchange tube 2 in the shallow well is a U-shaped tube;
the heat exchanger 1 in the middle-deep-layer well is used for being placed in a middle-deep-layer geothermal well with the depth of 1500-3000 meters;
the shallow in-well heat exchange tube 2 is placed in a shallow geothermal well with the depth of 80-150 meters and is used as an in-well heat exchange device of a shallow ground source heat pump heating system;
the upper end of the middle-deep inner sleeve 12 is communicated to the water inlet end of the heat exchange tube 2 in the U-shaped shallow well through a first pipeline;
the water outlet end of the U-shaped shallow layer well heat exchange tube 2 is communicated to the upper part of an annular space between the outer side wall of the middle-deep inner sleeve 12 and the inner side wall of the middle-deep outer sleeve 11 through a second pipeline;
a gate valve 4 is arranged on the first pipeline or the second pipeline;
the heat exchanger 1 in the middle deep layer well, the heat exchange tube 2 in the shallow layer well, the first pipeline and the second pipeline are filled with liquid heat exchange media.
Preferably, the liquid heat exchange medium is water.
The heat exchanger 1 in the middle-deep-layer well is used for being placed in a middle-deep-layer geothermal well with the depth of 2000-3000 meters.
In the ground source heat pump heating system of the first embodiment, after a heating season is finished, a heat pump unit of a shallow ground source heat pump heating system is stopped, a gate valve 4 is opened, a heat exchanger 1 in a middle-deep well is communicated with a heat exchange tube 2 in a shallow well, because the temperature of a liquid heat exchange medium in the heat exchanger 1 in the middle-deep well is high (more than 50 ℃) and the density is low, the temperature of the liquid heat exchange medium in the heat exchange tube 2 in the shallow well is low (below 20 ℃) and the density is high, and depending on different temperature density differences of the liquid heat exchange medium, the liquid heat exchange medium can naturally flow from a middle-deep inner sleeve 12 of the heat exchanger 1 in the middle-deep well to a water inlet end of the heat exchange tube 2 in the shallow well, so that natural circulation. When the ground source heat pump heating system is applied to residential projects, because the heat in the deep stratum and the surface heat cannot be transferred to the constant temperature layer, the heat exchange tube 2 in the shallow layer well can only supplement a small amount of heat by means of groundwater flow and stratum horizontal direction conduction, when the heating season is finished, the heat exchange tube 2 in the shallow layer well is in a low temperature state (below 20 ℃), after a heat pump unit of the shallow layer ground source heat pump heating system is shut down, a gate valve 4 is opened, the heat exchanger 1 in the middle layer well can continuously lead out the middle layer geothermal heat (60-120 ℃) to the heat exchange tube 2 in the shallow layer well, and the heat supplementing function of the shallow layer ground source heat pump heating.
The ground source heat pump heating system provided by the embodiment 1 supplements heat for the shallow ground source heat pump heating system by using the heat exchanger 1 in the middle-deep geothermal well which is placed at the depth of 1500-3000 meters, so that the number of the shallow geothermal wells can be greatly reduced, the shallow ground source heat pump heating system can be applied to a single heating project such as a house, the application range of the shallow ground source heat pump heating system is increased, and the shallow ground source heat pump heating system can be applied to a severe cold area or a single heating project; the natural circulation heat compensation can be carried out by means of the natural flow of the temperature density difference of the liquid heat exchange medium, the heat compensation function of the shallow ground source heat pump heating system is realized, electromechanical equipment such as a water pump and the like does not need to be started, and electricity consumption, zero consumption and zero emission are realized; the heat energy for heat supplement comes from a middle-deep geothermal well, is a clean renewable energy source, and is green and pollution-free; and the operation period of the concurrent heating is free from the need of watching and maintaining.
Example two
Based on the ground source heat pump heating system of the first embodiment, two ends of the gate valve 4 are communicated with a bypass pipeline;
and a heat supplementing circulating pump 3 is arranged in the bypass pipeline.
Preferably, a temperature sensor is arranged in the shallow geothermal well;
the temperature sensor is used for detecting the temperature in the shallow layer well at the position of the heat exchange tube in the shallow layer well.
During the heat compensation period, the amount of heat compensation required by the shallow ground source heat pump heating system can be predicted according to the temperature in the shallow well detected by the temperature sensor, if the amount of heat compensation of natural flow is enough, the heat compensation can be completely performed by natural heat compensation, otherwise, the heat compensation circulating pump 3 is started in advance to perform forced heat compensation.
The natural heat compensation of the communication gate valve 4 or the forced circulation heat compensation by opening the heat compensation circulating pump 3 can be judged by calculating the heat compensation capacity of the heat exchanger 1 in the middle-deep layer well in the middle-deep layer geothermal well and the heat taking quantity of the heat exchange tube 2 in the shallow layer well. For example, the natural inrush current flow rate of a medium-deep geothermal well with a depth of 2500-3000 m is 5-12 m depending on the water temperature density difference3And h, the single-well heat supplementing capacity is 170-420 kW, and a large amount of heat can be supplemented after the shallow ground source heat pump heating system stops heating. The single well of the shallow geothermal well with the depth of 120 meters has the heat extraction capacity of about 4kW, and the heat compensation operation time is considered to be more than 200 days, so that the single middle-deep geothermal well can perform heat compensation on 100-300 shallow geothermal wells.
In the ground source heat pump heating system of the second embodiment, if the number of the middle-deep geothermal wells is small, the heat exchangers in the middle-deep geothermal wells are configured less, or rapid heat compensation needs to be performed on the shallow ground source heat pump heating system, the gate valve 4 can be closed, the heat compensation circulating pump 3 can be opened, the heat compensation circulating pump 3 is added for forced circulation heat exchange, and the heat compensation capacity of the middle-deep geothermal heat on the shallow ground source heat pump heating system is improved by consuming a small amount of electric energy to accelerate heat exchange.
EXAMPLE III
Based on the ground source heat pump heating system of the second embodiment, the heat exchanger 1 in the middle-deep layer well is used as an in-well heat exchange device of the heat pump heating system of the middle-deep layer ground source.
Preferably, the ratio of the heat supply capacities of the heat supply system of the middle-deep ground source heat pump and the heat supply system of the shallow ground source heat pump is 1:4 to 1:1, and the ratio can be determined according to the investment condition.
Preferably, the heat-compensating circulating pump 3 is a heat exchanger circulating pump of a medium-deep ground source heat pump heating system or a heat exchange pipe circulating pump of a shallow ground source heat pump heating system, and the cost is saved by sharing the circulating pump of the existing heating system.
In the ground source heat pump heat supply system of the third embodiment, after the heating season is over, the heat pump units of the middle-deep ground source heat pump heat supply system and the shallow ground source heat pump heat supply system are shut down, and the heat compensation function of the shallow ground source heat pump heat supply system can be realized by opening the gate valve 4. During the heat supply period, the heat supply system of the medium-deep geothermal source heat pump and the heat supply system of the shallow geothermal source heat pump operate independently to supply heat to the building; after heat supply is finished and the system is maintained and overhauled, the system can be switched to heat supplementing operation, the heat exchanger 1 in the middle-deep layer well of the middle-deep layer geothermal source heat pump heat supply system is used as a heat supplementing heat source of the shallow layer geothermal source heat pump heat supply system, and the heat supplementing system has no extra investment.
Example four
Based on the ground source heat pump heating system of the second embodiment, the heat exchange tube 2 in the shallow well is made of Polyethylene (PE).
The heat exchange tube 2 in the shallow layer well is the PE material, and the buried depth is shallow, and the pipeline is long, easily receives other construction actions to destroy, has the damaged condition during the concurrent heating, will in time stop the concurrent heating, overhauls and restores the heat exchange tube in the shallow layer well, prevents that impurity from getting into ground source heat pump heating system and polluting heat exchanger 1 in the well of the deep layer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A ground source heat pump heating system is characterized by comprising a heat exchanger (1) in a middle-deep well and a heat exchange pipe (2) in a shallow well;
the heat exchanger (1) in the middle-deep well comprises a middle-deep outer sleeve (11) and a middle-deep inner sleeve (12);
the bottom end and the side wall of the middle-depth outer sleeve (11) are closed;
the middle-depth inner sleeve (12) is arranged in the middle-depth outer sleeve (11), and an opening at the bottom end of the middle-depth inner sleeve (12) is communicated with the bottom of the middle-depth outer sleeve (11);
the upper part of the outer side wall of the middle-deep inner sleeve (12) is closed with the upper part of the inner side wall of the middle-deep outer sleeve (11), and an annular space is formed between the outer side wall of the middle-deep inner sleeve (12) and the inner side wall of the middle-deep outer sleeve (11);
the heat exchange tube (2) in the shallow well is a U-shaped tube;
the heat exchanger (1) in the middle-deep-layer well is used for being placed in a middle-deep-layer geothermal well with the depth of 1500-3000 meters;
the shallow-layer in-well heat exchange tube (2) is placed in a shallow-layer geothermal well with the depth of 80-150 meters and is used as an in-well heat exchange device of a shallow-layer ground source heat pump heat supply system;
the upper end of the middle-deep inner sleeve (12) is communicated to the water inlet end of the heat exchange tube (2) in the U-shaped shallow well through a first pipeline;
the water outlet end of the U-shaped shallow layer well internal heat exchange tube (2) is communicated to the upper part of an annular space between the outer side wall of the middle-deep inner sleeve (12) and the inner side wall of the middle-deep outer sleeve (11) through a second pipeline;
a gate valve (4) is arranged on the first pipeline or the second pipeline;
the heat exchanger (1) in the middle-deep layer well, the heat exchange tube (2) in the shallow layer well, the first pipeline and the second pipeline are filled with liquid heat exchange media.
2. A ground source heat pump heating system according to claim 1,
the liquid heat exchange medium is water.
3. A ground source heat pump heating system according to claim 1,
the heat exchanger (1) in the middle-deep-layer well is used for being placed in the middle-deep-layer geothermal well with the depth of 2000-3000 meters.
4. A ground source heat pump heating system according to claim 1,
two ends of the gate valve (4) are communicated with a bypass pipeline;
and a heat supplementing circulating pump (3) is arranged in the bypass pipeline.
5. A ground source heat pump heating system according to claim 1,
a temperature sensor is arranged in the shallow geothermal well;
the temperature sensor is used for detecting the temperature in the shallow layer well at the position of the heat exchange tube in the shallow layer well.
6. A ground source heat pump heating system according to claim 1,
the heat exchanger (1) in the middle-deep layer well is used as an in-well heat exchange device of a heat pump heating system of a middle-deep layer geothermal source.
7. A ground source heat pump heating system according to claim 6,
the ratio of the heat supply capacity of the heat supply system of the middle-deep ground source heat pump to that of the heat supply system of the shallow ground source heat pump is 1:4 to 1: 1.
8. A ground source heat pump heating system according to claim 6,
the heat supplementing circulating pump (3) is a heat exchanger circulating pump of a middle-deep ground source heat pump heating system or a heat exchange pipe circulating pump of a shallow ground source heat pump heating system.
9. A ground source heat pump heating system according to claim 1,
the heat exchange tube (2) in the shallow layer well is made of polyethylene.
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| CN201911172349.2A CN110864472A (en) | 2019-11-26 | 2019-11-26 | Ground source heat pump heating system |
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| CN201911172349.2A CN110864472A (en) | 2019-11-26 | 2019-11-26 | Ground source heat pump heating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629074A (en) * | 2021-01-05 | 2021-04-09 | 中国长江三峡集团有限公司 | Shallow geothermal ground source heat pump system and method based on middle-deep geothermal energy |
| CN113091350A (en) * | 2021-04-12 | 2021-07-09 | 江苏梦溪智能环境科技有限公司 | Energy-saving ground source heat pump system for large industrial project |
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2019
- 2019-11-26 CN CN201911172349.2A patent/CN110864472A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629074A (en) * | 2021-01-05 | 2021-04-09 | 中国长江三峡集团有限公司 | Shallow geothermal ground source heat pump system and method based on middle-deep geothermal energy |
| CN113091350A (en) * | 2021-04-12 | 2021-07-09 | 江苏梦溪智能环境科技有限公司 | Energy-saving ground source heat pump system for large industrial project |
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