CN109724276B - Operation mode of medium-deep buried pipe heating system - Google Patents
Operation mode of medium-deep buried pipe heating system Download PDFInfo
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- CN109724276B CN109724276B CN201811643926.7A CN201811643926A CN109724276B CN 109724276 B CN109724276 B CN 109724276B CN 201811643926 A CN201811643926 A CN 201811643926A CN 109724276 B CN109724276 B CN 109724276B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 5
- 235000020681 well water Nutrition 0.000 claims description 21
- 239000002349 well water Substances 0.000 claims description 21
- 238000004378 air conditioning Methods 0.000 claims description 10
- 238000003911 water pollution Methods 0.000 claims description 3
- 239000005431 greenhouse gas Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
-
- 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 provides an operation mode of a medium-deep buried pipe heat supply system, which comprises a sleeve heat exchanger side heat supply circulation loop, a medium geothermal water heat supply circulation loop, a heat exchanger user side heat supply circulation loop, a heat exchanger heat pump side heat supply circulation loop and a heat pump unit air conditioner side heat supply circulation loop. The invention directly supplies heat and warms to the floor radiant heating system through underground heat exchange of the medium-deep buried pipe heat exchanger, thereby realizing 'no water when getting heat'; meanwhile, the middle geothermal water is added as a heat source to perform step heat exchange, so that the energy utilization efficiency is improved. The medium-deep buried pipe heat exchange system is combined with the geothermal water system, so that the application field of the hydrothermal geothermal energy in energy-saving, environment-friendly and green buildings is developed, the emission of greenhouse gases is reduced, and the method has important significance for realizing sustainable development of the environment.
Description
Technical Field
The invention relates to a buried pipe system in the field of comprehensive energy utilization, in particular to a medium-deep buried pipe heat supply system for combined heat supply of a deep buried pipe system and a medium-layer geothermal well system and an operation mode.
Background
Geothermal energy is a new clean energy source, and under the conditions that the environmental awareness of people is gradually enhanced and the energy is gradually lacked, reasonable development and utilization of geothermal resources are increasingly favored by people. The ' thirteen five ' planning for geothermal energy development and utilization ' clearly proposes that the geothermal energy utilization increment accounts for one third of the non-fossil energy increment, so that the development and utilization of geothermal energy are greatly promoted, the pollutant emission is reduced, the ecological environment is improved, the energy structure of China can be effectively regulated, and the overall requirements of advanced technology, environmental friendliness and economy and feasibility are achieved, and the sustainable development of economy and society is realized.
The water-heating geothermal energy heating technology is basically mature in China. Aiming at the problems of excessive development of shallow geothermal energy and the like, the invention combines the middle-deep buried pipe with the middle geothermal well to explore a high-efficiency and environment-friendly comprehensive utilization system of the middle-deep geothermal energy; under the call of responding to the country that the water is not taken by taking the heat, the underground heat exchanger of the middle-deep buried pipe is arranged, and the utilization field of the water-heat type geothermal energy is developed, so that the sustainable development of energy is facilitated. The invention can comprehensively promote the utilization of the water-heat type geothermal energy and effectively relieve the problems of serious pollution, excessive development and the like of the shallow geothermal energy. There is no related patent document in the direction after searching the published Chinese patent document.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a medium-deep buried pipe heat supply system and an operation mode, takes a medium-deep buried pipe heat exchanger system and a medium-deep geothermal well as heat sources, realizes balanced mining and irrigation, takes heat without water, effectively relieves the pressure of shallow geothermal resources and improves the utilization efficiency of resources.
The invention solves the technical problems by the following technical proposal:
a medium-deep buried pipe heating system comprises a floor radiation heating system (1), a first electromagnetic valve (2), a booster pump (3), a double-pipe heat exchanger outer pipe A (4), a double-pipe heat exchanger inner pipe A (5), a double-pipe heat exchanger outer pipe B (6), a double-pipe heat exchanger inner pipe B (7), a double-pipe heat exchanger side circulating water pump (8), a second electromagnetic valve (9), a medium-layer geothermal well water outlet well (10), a variable-frequency submersible pump A (11), a filter (12), a third electromagnetic valve (13), a plate heat exchanger A (14), a fourth electromagnetic valve (15), a plate heat exchanger B (16), a fifth electromagnetic valve (17), a recharging booster pump (18), a medium-layer geothermal well recharging well (19), a sixth electromagnetic valve (20), a water source heat pump unit (21), a seventh electromagnetic valve (22), an eighth electromagnetic valve (23), an indoor air conditioning system (24), a ninth electromagnetic valve (25), a tenth electromagnetic valve (26), a radiator (27) and an eleventh electromagnetic valve (28);
the double pipe heat exchanger inner pipe A (5) and the double pipe heat exchanger inner pipe B (7) are sequentially connected with a double pipe heat exchanger side circulating water pump (8), a second electromagnetic valve (9), a floor radiant heating system (1), a first electromagnetic valve (2) and a pressurizing pump (3) to return to the double pipe heat exchanger outer pipe A (4) and the double pipe heat exchanger outer pipe B (6) to form a double pipe heat exchanger side heat supply circulating loop; the middle geothermal well water outlet well (10) is connected with a variable-frequency submersible pump A (11), a filter (12), a third electromagnetic valve (13), a plate heat exchanger A (14), a fourth electromagnetic valve (15), a plate heat exchanger B (16), a fifth electromagnetic valve (17) and a recharging pressurizing pump (18) in sequence and returns to a middle geothermal well recharging well (19) to form a middle geothermal water heating circulation loop; the plate heat exchanger A (14) is sequentially connected with a tenth electromagnetic valve (26), a radiator (27) and an eleventh electromagnetic valve (28) and returns to the plate heat exchanger A (14) to form a heat supply circulation loop at the user side of the heat exchanger; the plate heat exchanger B (16) is sequentially connected with a sixth electromagnetic valve (20), a water source heat pump unit (21) and a seventh electromagnetic valve (22) and returns to the plate heat exchanger B (16) to form a heat pump side heat supply circulation loop of the heat exchanger; the water source heat pump unit (21) is sequentially connected with an eighth electromagnetic valve (23), an indoor air conditioning system (24) and a ninth electromagnetic valve (25) to return to the water source heat pump unit (21) to form a heat pump unit air conditioning side heat supply circulation loop.
In addition, the middle geothermal well water outlet well (10) and the middle geothermal well recharging well (19) are arranged at the buried depth of 1000-2000m in the underground bottom; the outer tube A (4), the inner tube A (5), the outer tube B (6) and the inner tube B (7) are all arranged at the bottom of the ground at the depth of 2000-3000m.
And the primary side of the middle geothermal well recharging well (19) has a primary temperature of 60-40 ℃, a secondary temperature of 40-8 ℃, and a recharging water temperature of 8 ℃, and well water is indirectly exchanged to avoid well water pollution.
And a filter is arranged at the water outlet pipe of the middle geothermal well water outlet well (10).
The operation mode of the medium-deep buried pipe heat supply system comprises the following steps:
heating period: opening the first electromagnetic valve (2) and the second electromagnetic valve (9), and opening the outer tube A (4) of the double pipe heat exchanger
The inner tube A (5), the outer tube B (6) and the inner tube B (7) of the double-pipe heat exchanger are used as heat sources to directly supply heat to the floor radiant heating system (1); the third electromagnetic valve (13), the tenth electromagnetic valve (26), the eleventh electromagnetic valve (28), the fourth electromagnetic valve (15), the seventh electromagnetic valve (22), the ninth electromagnetic valve (25), the eighth electromagnetic valve (23), the sixth electromagnetic valve (20) and the fifth electromagnetic valve (17) are opened, the middle geothermal well water outlet well (10) exchanges heat with the first stage of the plate heat exchanger A (14), the radiator (27) is heated, and then the heat exchanges with the second stage of the plate heat exchanger B (16) and returns to the middle geothermal well recharging well (19).
The invention has the advantages and beneficial effects that:
1. according to the deep buried pipe heat supply system and the running mode, the sleeve heat exchanger is fully utilized to realize underground heat exchange, and under the call of responding to the national heat taking without water, the energy consumption is reduced, the clean development and perpetual maintenance of geothermal energy are ensured, and the ecological civilization construction is facilitated.
2. According to the medium-deep buried pipe heat supply system and the operation mode, the medium-deep double-pipe heat exchanger system is additionally provided with the medium-layer geothermal well pumping and recharging well as a heat source, so that the forced convection of medium-layer geothermal water is caused, the heat exchange intensity of the medium-deep buried pipe system is enhanced, the operation efficiency of the system is improved, the energy transformation is promoted while the regenerated low-grade energy is fully utilized, the heavy problems of heating in winter, haze prevention and control and the like are solved, and the comprehensive utilization of new energy is promoted.
Drawings
FIG. 1 is a schematic diagram of a deep buried pipe heating system and its operation in accordance with the present invention.
In the figure: 1-floor radiant heating system, 2-first solenoid valve, 3-booster pump, 4-double pipe heat exchanger outer pipe A, 5-double pipe heat exchanger inner pipe A, 6-double pipe heat exchanger outer pipe B, 7-double pipe heat exchanger inner pipe B, 8-double pipe heat exchanger side circulating water pump, 9-second solenoid valve, 10-middle layer geothermal well water outlet well, 11-variable frequency submersible pump A, 12-filter, 13-third solenoid valve, 14-plate heat exchanger A, 15-fourth solenoid valve, 16-plate heat exchanger B, 17-fifth solenoid valve, 18-recharging booster pump, 19-middle layer geothermal well recharging well, 20-sixth solenoid valve, 21-water source heat pump unit, 22-seventh solenoid valve, 23-eighth solenoid valve, 24-indoor air conditioning system, 25-ninth solenoid valve, 26-tenth solenoid valve, 27-radiator, 28-eleventh solenoid valve.
Description of the embodiments
The invention is further illustrated by the following examples, which are intended to be illustrative only and not limiting in any way.
A medium-deep buried pipe heat supply system and an operation mode mainly comprise a sleeve heat exchanger side heat supply circulation loop, a medium geothermal water heat supply circulation loop, a heat exchanger user side heat supply circulation loop, a heat exchanger heat pump side heat supply circulation loop and a heat pump unit air conditioner side heat supply circulation loop; the method comprises the following steps:
the system comprises a floor radiant heating system (1), a first electromagnetic valve (2), a booster pump (3), a double-pipe heat exchanger outer pipe A (4), a double-pipe heat exchanger inner pipe A (5), a double-pipe heat exchanger outer pipe B (6), a double-pipe heat exchanger inner pipe B (7), a double-pipe heat exchanger side circulating water pump (8), a second electromagnetic valve (9), a middle geothermal well water outlet well (10), a variable-frequency submersible pump A (11), a filter (12), a third electromagnetic valve (13), a plate heat exchanger A (14), a fourth electromagnetic valve (15), a plate heat exchanger B (16), a fifth electromagnetic valve (17), a recharging booster pump (18), a middle geothermal well recharging well (19), a sixth electromagnetic valve (20), a water source heat pump unit (21), a seventh electromagnetic valve (22), an eighth electromagnetic valve (23), an indoor air conditioning system (24), a ninth electromagnetic valve (25), a tenth electromagnetic valve (26), a radiator (27) and an eleventh electromagnetic valve (28);
the double pipe heat exchanger inner pipe A (5) and the double pipe heat exchanger inner pipe B (7) are sequentially connected with a double pipe heat exchanger side circulating water pump (8), a second electromagnetic valve (9), a floor radiant heating system (1), a first electromagnetic valve (2) and a pressurizing pump (3) to return to the double pipe heat exchanger outer pipe A (4) and the double pipe heat exchanger outer pipe B (6) to form a double pipe heat exchanger side heating circulation loop; the middle geothermal well water outlet well (10) is connected with a variable-frequency submersible pump A (11), a filter (12), a third electromagnetic valve (13), a plate heat exchanger A (14), a fourth electromagnetic valve (15), a plate heat exchanger B (16), a fifth electromagnetic valve (17) and a recharging pressurizing pump (18) in sequence and returns to a middle geothermal well recharging well (19) to form a middle geothermal water heating circulation loop; the plate heat exchanger A (14) is sequentially connected with a tenth electromagnetic valve (26), a radiator (27) and an eleventh electromagnetic valve (28) and returns to the plate heat exchanger A (14) to form a heat supply circulation loop at the user side of the heat exchanger; the plate heat exchanger B (16) is sequentially connected with a sixth electromagnetic valve (20), a water source heat pump unit (21) and a seventh electromagnetic valve (22) and returns to the plate heat exchanger B (16) to form a heat pump side heat supply circulation loop of the heat exchanger; the water source heat pump unit (21) is sequentially connected with an eighth electromagnetic valve (23), an indoor air conditioning system (24) and a ninth electromagnetic valve (25) to return to the water source heat pump unit (21) to form a heat pump unit air conditioning side heat supply circulation loop.
The middle geothermal well water outlet well (10) and the middle geothermal well recharging well (19) are arranged at the buried depth of the underground bottom boundary of 1000-2000m; the outer tube A (4), the inner tube A (5), the outer tube B (6) and the inner tube B (7) are all arranged at the bottom of the ground at the depth of 2000-3000m.
The primary side of the middle geothermal well recharging well (19) has a primary temperature of 60-40 ℃, a secondary temperature of 40-8 ℃, a recharging water temperature of 8 ℃, and well water is indirectly exchanged to avoid well water pollution. The water outlet pipe of the water outlet well (10) of the middle geothermal well is provided with a filter.
The operation mode of the medium-deep buried pipe heat supply system comprises the following steps:
heating period: opening a first electromagnetic valve (2) and a second electromagnetic valve (9), wherein the outer tube A (4), the inner tube A (5), the outer tube B (6) and the inner tube B (7) of the double-tube heat exchanger serve as heat sources to directly supply heat to the floor radiant heating system (1); the third electromagnetic valve (13), the tenth electromagnetic valve (26), the eleventh electromagnetic valve (28), the fourth electromagnetic valve (15), the seventh electromagnetic valve (22), the ninth electromagnetic valve (25), the eighth electromagnetic valve (23), the sixth electromagnetic valve (20) and the fifth electromagnetic valve (17) are opened, the middle geothermal well water outlet well (10) exchanges heat with the first stage of the plate heat exchanger A (14), the radiator (27) is heated, and then the heat exchanges with the second stage of the plate heat exchanger B (16) and returns to the middle geothermal well recharging well (19).
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and the disclosure of the drawings.
Claims (4)
1. The operation mode of the medium-deep buried pipe heating system is characterized in that: the heating system includes: the floor radiant heating system comprises a floor radiant heating system (1), a first electromagnetic valve (2), a booster pump (3), a double-pipe heat exchanger outer pipe A (4), a double-pipe heat exchanger inner pipe A (5), a double-pipe heat exchanger outer pipe B (6), a double-pipe heat exchanger inner pipe B (7), a double-pipe heat exchanger side circulating water pump (8), a second electromagnetic valve (9), a middle geothermal well water outlet well (10), a variable-frequency submersible pump A (11), a filter (12), a third electromagnetic valve (13), a plate heat exchanger A (14), a fourth electromagnetic valve (15), a plate heat exchanger B (16), a fifth electromagnetic valve (17), a recharging booster pump (18), a middle geothermal well recharging well (19), a sixth electromagnetic valve (20), a water source heat pump unit (21), a seventh electromagnetic valve (22), an eighth electromagnetic valve (23), an indoor air conditioning system (24), a ninth electromagnetic valve (25), a tenth electromagnetic valve (26), a radiator (27) and an eleventh electromagnetic valve (28);
the double pipe heat exchanger inner pipe A (5) and the double pipe heat exchanger inner pipe B (7) are sequentially connected with a double pipe heat exchanger side circulating water pump (8), a second electromagnetic valve (9), a floor radiant heating system (1), a first electromagnetic valve (2) and a pressurizing pump (3) to return to the double pipe heat exchanger outer pipe A (4) and the double pipe heat exchanger outer pipe B (6) to form a double pipe heat exchanger side heat supply circulating loop; the middle geothermal well water outlet well (10) is connected with a variable-frequency submersible pump A (11), a filter (12), a third electromagnetic valve (13), a plate heat exchanger A (14), a fourth electromagnetic valve (15), a plate heat exchanger B (16), a fifth electromagnetic valve (17) and a recharging pressurizing pump (18) in sequence and returns to a middle geothermal well recharging well (19) to form a middle geothermal water heating circulation loop; the plate heat exchanger A (14) is sequentially connected with a tenth electromagnetic valve (26), a radiator (27) and an eleventh electromagnetic valve (28) and returns to the plate heat exchanger A (14) to form a heat supply circulation loop at the user side of the heat exchanger; the plate heat exchanger B (16) is sequentially connected with a sixth electromagnetic valve (20), a water source heat pump unit (21) and a seventh electromagnetic valve (22) and returns to the plate heat exchanger B (16) to form a heat pump side heat supply circulation loop of the heat exchanger; the water source heat pump unit (21) is sequentially connected with an eighth electromagnetic valve (23), an indoor air conditioning system (24) and a ninth electromagnetic valve (25) to return to the water source heat pump unit (21) to form a heat pump unit air conditioning side heat supply circulation loop;
the operation mode is as follows:
heating period: the first electromagnetic valve (2) and the second electromagnetic valve (9) are opened, and the outer tube A (4), the inner tube A (5), the outer tube B (6) and the inner tube B (7) of the medium-deep tube heat exchanger are used as heat sources to directly supply heat to the floor radiant heating system (1); the third electromagnetic valve (13), the tenth electromagnetic valve (26), the eleventh electromagnetic valve (28), the fourth electromagnetic valve (15), the seventh electromagnetic valve (22), the ninth electromagnetic valve (25), the eighth electromagnetic valve (23), the sixth electromagnetic valve (20) and the fifth electromagnetic valve (17) are opened, the middle geothermal well water outlet well (10) exchanges heat with the first stage of the plate heat exchanger A (14), the radiator (27) is heated, and then the heat exchanges with the second stage of the plate heat exchanger B (16) and returns to the middle geothermal well recharging well (19).
2. The method of operating a mid-deep buried pipe heating system of claim 1, wherein: the middle geothermal well water outlet well (10) and the middle geothermal well recharging well (19) are arranged at the buried depth of the underground bottom boundary of 1000-2000m; the outer tube A (4), the inner tube A (5), the outer tube B (6) and the inner tube B (7) are all arranged at the bottom of the ground at the depth of 2000-3000m.
3. The method of operating a mid-deep buried pipe heating system of claim 1, wherein: the primary side of the middle geothermal well recharging well (19) has a primary temperature of 60-40 ℃, a secondary temperature of 40-8 ℃, a recharging water temperature of 8 ℃, and well water is indirectly exchanged to avoid well water pollution.
4. The method of operating a mid-deep buried pipe heating system of claim 1, wherein: and a filter is arranged at the water outlet pipe of the middle geothermal well water outlet well (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811643926.7A CN109724276B (en) | 2018-12-29 | 2018-12-29 | Operation mode of medium-deep buried pipe heating system |
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| CN201811643926.7A CN109724276B (en) | 2018-12-29 | 2018-12-29 | Operation mode of medium-deep buried pipe heating system |
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| CN109724276B true CN109724276B (en) | 2024-03-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JOP20200331A1 (en) | 2018-06-20 | 2020-12-20 | Alan McBay David | Method, system and apparatus for extracting heat energy from geothermal briny fluid |
| CN111750405A (en) * | 2020-05-29 | 2020-10-09 | 河南省中能联建地热工程有限公司 | Enhancement mode geothermal heating system |
| CN113357700A (en) * | 2021-07-09 | 2021-09-07 | 陕西一二三环保科技有限公司 | Compound type medium-deep layer interference-free geothermal heating system |
| CN116624910B (en) * | 2023-07-24 | 2023-10-03 | 中石油深圳新能源研究院有限公司 | Medium-deep geothermal pressure-variable drainage heating system, method and storage medium |
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| CN202204209U (en) * | 2011-07-27 | 2012-04-25 | 挪信能源技术（上海）有限公司 | Stainless steel extension-type ground heat exchanger system |
| JP2012207882A (en) * | 2011-03-30 | 2012-10-25 | Mitsubishi Electric Corp | Hot-water heater |
| CN204830148U (en) * | 2015-07-21 | 2015-12-02 | 中国建筑第七工程局有限公司 | Novel building heat preservation system |
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| CN206330199U (en) * | 2016-12-29 | 2017-07-14 | 天津汇达热力集团有限公司 | A kind of geothermal energy effective utilization system |
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| KR101623746B1 (en) * | 2015-11-05 | 2016-05-24 | 주식회사 제이앤지 | Second stage heating type geothermal heat system using geothermal energy |
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| JP2012207882A (en) * | 2011-03-30 | 2012-10-25 | Mitsubishi Electric Corp | Hot-water heater |
| CN202204209U (en) * | 2011-07-27 | 2012-04-25 | 挪信能源技术（上海）有限公司 | Stainless steel extension-type ground heat exchanger system |
| CN204830148U (en) * | 2015-07-21 | 2015-12-02 | 中国建筑第七工程局有限公司 | Novel building heat preservation system |
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