CN111691452B - Ground source heat pump integrated equipment based on building underground structure and construction method thereof - Google Patents
Ground source heat pump integrated equipment based on building underground structure and construction method thereof Download PDFInfo
- Publication number
- CN111691452B CN111691452B CN201910194896.4A CN201910194896A CN111691452B CN 111691452 B CN111691452 B CN 111691452B CN 201910194896 A CN201910194896 A CN 201910194896A CN 111691452 B CN111691452 B CN 111691452B
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- underground structure
- well
- machine room
- horizontal
- 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
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- 239000004576 sand Substances 0.000 claims description 30
- 239000002689 soil Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007788 liquid Substances 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
- 230000002459 sustained effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention provides a ground source heat pump integrated technology based on a building underground structure and a construction method thereof. The construction method provided by the invention comprises the following steps: preparing construction, drilling a heat exchange well, lowering a heat exchange pipe, backfilling the heat exchange well, constructing a horizontal ditch, constructing a bottom plate of an underground structure, and controlling the construction of a machine room and the continuous construction of the underground structure. The invention is based on building underground structure to develop construction, does not occupy extra land, does not influence the total construction period of engineering projects, is applicable to various site conditions and geothermal conditions, and is a more environment-friendly geothermal utilization technology.
Description
Technical Field
The invention belongs to the technical field of geothermal utilization, and particularly relates to a ground source heat pump integrated device based on a building underground structure and a construction method thereof.
Background
With the development and transformation of society and economy in China, the traditional single energy structure relying on fossil fuel is difficult to be sustained, new energy forms are continuously emerging, and the development and utilization of geothermal energy are greatly developed as an important new energy form. The ground source heat pump technology is a technology for developing and utilizing geothermal energy, and has become a main form of geothermal utilization by virtue of the advantages of saving energy, reducing pollutant emission and the like. A large number of application practices at home and abroad prove that the mature building energy-saving technology can be increasingly applied.
The geothermal energy source is utilized by the ground source heat pump system, a heat exchange pipe is required to be laid to pump heat exchange liquid (generally water) with lower temperature to a bottom layer with a certain geothermal energy, and the geothermal energy source is brought to the ground through the flow of the water, so that the effect of cyclic utilization is achieved. The heat exchange tube must be laid underground, and the traditional heat exchange well generally adopts an outdoor drilling scheme, so that the cost is high, a large amount of land is occupied, and the heat exchange tube is extremely inapplicable to areas with intense land and abundant geothermal resources. Therefore, it is needed to provide a ground source heat pump technology system which can be positioned below a building by combining the characteristics of the building engineering.
Disclosure of Invention
The invention aims to solve the problem that a buried pipeline is limited by site factors in the existing ground source heat pump technology, overcome the defects of the prior art, improve the utilization rate of geothermal resources and provide ground source heat pump integrated equipment based on a building underground structure and a construction method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the ground source heat pump integrated equipment based on the building underground structure consists of a building underground structure and a ground source heat pump system;
the underground structure is positioned above a ground source heat pump system and consists of an underground structure supporting structure 1, an underground structure outer wall 2 and an underground structure bottom plate 3, wherein the underground structure supporting structure 1 is a supporting pile or an underground continuous wall structure with supporting function during foundation pit construction, the underground structure outer wall 2 is a reinforced concrete basement outer wall with a certain thickness, the underground structure bottom plate 3 is a basement bottom plate with a certain thickness, the underground structure outer wall 2, the underground structure bottom plate 3 and an internal supporting structure thereof form an underground structure space together, and the underground structure space plays a role in supporting an upper structure of a building;
The ground source heat pump system consists of a heat exchange well 4, a horizontal ditch 8 and a control machine room 14;
The heat exchange well 4 consists of double U-shaped heat exchange tubes 5, backfill soil 6 and backfill coarse sand 7, the space of the heat exchange well 4 is a slender vertical column-shaped space formed in soil body below an underground structure by adopting methods such as drilling and the like, and the depth of the heat exchange well 4 is determined according to the condition of local geothermal resources and soil conditions; the double-U-shaped heat exchange tube 5 is a pipeline which is arranged in the heat exchange well 4 and used for flowing heat exchange water, plastic materials or metal materials can be adopted, the length of the double-U-shaped heat exchange tube 5 is four times of the length of the heat exchange well 4, the double-U-shaped heat exchange tube 5 is bent in the heat exchange well 4 for three times in a U shape, and the heat exchange water in the double-U-shaped heat exchange tube 5 can flow through the whole heat exchange well 4 for four times so as to fully utilize geothermal resources; the backfill soil 6 is positioned at the lower part of the heat exchange well 4, the filling depth is slightly smaller than the depth of the heat exchange well 4 for filling the soil body in the heat exchange well 4, the backfill coarse sand 7 is positioned at the upper part of the heat exchange well 4, the filling depth is smaller, and the backfill soil 6 and the backfill coarse sand 7 jointly enable the double U-shaped heat exchange tube 5 to be fully contacted with the surrounding soil body; the heat exchange wells 4 work together and can be arranged in a square shape or a quincuncial shape, and can be connected with the control machine room 14 through the horizontal ditch 8 in a parallel or serial mode, the spacing between the heat exchange wells 4 is generally 4-5 m, and the specific arrangement mode is determined according to the conditions of the underground structure form, geothermal resource condition, soil geological condition and the like;
The horizontal ditch 8 is positioned below the underground structure bottom plate 3 and is a horizontal structure of the connected heat exchange well 4 and the control machine room 14, the horizontal ditch 8 consists of a horizontal heat exchange pipe 9, fine sand 10, graded broken stone 11, a hot water circulating pipe 12 and a cold water circulating pipe 13, the horizontal ditch 8 adopts an inverted trapezoid cross section, the lower part is filled with fine sand 10 materials, the upper part is filled with graded broken stone 11 materials, and the horizontal heat exchange pipe 9 or the hot water circulating pipe 12 and the cold water circulating pipe 13 are embedded in the fine sand 10 at the lower part;
If the heat exchange wells 4 are connected in parallel, a hot water circulation pipe 12 and a cold water circulation pipe 13 are paved in parallel in the horizontal ditch 8, two ends of the double-U-shaped heat exchange pipe 5 of each heat exchange well 4 are respectively connected with the hot water circulation pipe 12 and the cold water circulation pipe 13 through two horizontal heat exchange pipes 9 to form a parallel loop, circulating water firstly uniformly flows into the cold water circulation pipe 13 from the control machine room 14, then flows into the double-U-shaped heat exchange pipe 5 of each parallel branch heat exchange well 4 from the cold water circulation pipe 13, after heat exchange with an underground soil body, the water temperature of the circulating water rises, the double-U-shaped heat exchange pipes 5 flowing out of the heat exchange wells 4 flow into the hot water circulation pipe 12, and the circulating water in the hot water circulation pipe 12 intensively flows back into the control machine room 14 to finish the collection of geothermal energy;
If the heat exchange wells 4 are connected in series, two ends of the double-U-shaped heat exchange tubes 5 of the plurality of heat exchange wells 4 are connected end to end through the horizontal heat exchange tubes 9 to form a series loop, two ends of the loop are connected with the control machine room 14, circulating water flows out from the control machine room 14 and sequentially passes through the double-U-shaped heat exchange tubes 5 of each heat exchange well 4 on the series loop to complete a heat exchange process, and finally flows back to the control machine room 14 to complete the collection of geothermal energy;
the heat exchange wells 4 are connected in parallel, so that the heat exchange wells 4 are generally suitable for the conditions of large number and large arrangement area of the heat exchange wells 4; the heat exchange wells 4 are connected in series, so that the heat exchange wells 4 are generally suitable for the conditions of less heat exchange wells 4 and smaller arrangement area;
The control machine room 14 is a room for arranging facilities such as a heat exchange pump and a control device, and is used by operation control personnel, the control machine room 14 is positioned in an underground structure, the lower part of the control machine room 14 penetrates through an underground bottom plate and stretches into the lower part of the underground structure bottom plate 3 by a certain distance, and the control machine room is used for being connected with the horizontal heat exchange pipe 9, the hot water circulating pipe 12 and the cold water circulating pipe 13 in the horizontal ditch 8.
The invention provides a ground source heat pump integrated device based on a building underground structure, and a construction method thereof mainly comprises eight steps:
Firstly, construction preparation: whether underground pipelines, pile foundations or other structures exist in a drilling area or not is investigated, the arrangement scheme and the construction sequence of the heat exchange well 4 and the horizontal ditch 8 are determined, the construction of a supporting structure is carried out according to a conventional construction method, and a foundation pit is excavated to a designed depth;
Secondly, drilling a heat exchange well: after the construction of the underground structure supporting structure 1 is completed, drilling the heat exchange wells 4 on the flat foundation pit ground, and drilling each heat exchange well 4 to the designed depth according to the design requirement;
Thirdly, the heat exchange tube is put down: the folded double-U-shaped heat exchange tube 5 is placed in the hole of the heat exchange well 4, so that the double-U-shaped heat exchange tube 5 is ensured to extend to the designed depth, and the length of the double-U-shaped heat exchange tube 5 is slightly longer than the depth of the hole of the heat exchange well 4, so that the double-U-shaped heat exchange tube can be exposed for a certain length, and the subsequent construction is facilitated;
Fourthly, backfilling the heat exchange well: filling and sealing holes from bottom to top when grouting is performed by adopting grouting and other methods to perform backfill construction of the heat exchange well 4, so that the grouting of a drilled hole is compact, no cavity is formed, backfill soil 6 is formed after mud in the well is precipitated, and backfill coarse sand 7 is adopted for backfill compaction at the upper part of the heat exchange well 4;
Fifthly, constructing a horizontal ditch: excavating a horizontal ditch 8 connecting each heat exchange well 4 and a control machine room 14 according to a design scheme, and paving fine sand 10 with a certain thickness on the horizontal ditch 8; the horizontal heat exchange pipes 9, the hot water circulation pipe 12 and the cold water circulation pipe 13 are paved and connected according to the design scheme, the horizontal pipes are connected with the heat exchange wells 4, and enough length is reserved at one end of each horizontal pipe, which is close to the control machine room 14, so that a hydraulic test is timely carried out to check the tightness of all the pipes; sequentially filling fine sand 10 and graded broken stone 11 into the horizontal ditch 8, and fully compacting;
sixth, constructing the bottom plate of the underground structure: the construction of the underground structure bottom plate 3 is carried out according to the conventional procedures, and the space of the control machine room 14 is reserved on the underground structure bottom plate 3;
Seventh, controlling the construction of a machine room: performing reinforced concrete structure construction of the control room 14 according to conventional procedures; installing a horizontal pipeline in the horizontal ditch 8 into the control machine room 14 in time, and installing facilities such as a heat exchange pump, a control device and the like in the control machine room 14;
Eighth step, the underground structure continues to be constructed: and carrying out all construction of the residual underground structure according to the conventional procedures.
Compared with the prior art, the invention has the beneficial effects that:
(1) The ground source heat pump integrated equipment provided by the invention is based on the construction of the underground structure, does not occupy extra land, saves land and is more environment-friendly;
(2) The construction process of the ground source heat pump integrated device is synchronous with the construction of the underground structure of the building, so that the total construction period of engineering projects is not influenced;
(3) The heat exchange well of the ground source heat pump integrated equipment provided by the invention can be arranged in parallel or in series, and is suitable for various site conditions and geothermal conditions.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic view of the construction of a heat exchanging well 4 according to the present invention.
Fig. 3 is a front view of the heat exchanging well 4 of the present invention.
Fig. 4 is a cross-sectional view of the horizontal groove 8 of the present invention.
Fig. 5 is a top view of the heat exchange tube of the present invention in a parallel arrangement.
Fig. 6 is a schematic diagram of a pipeline connection of heat exchange tubes of the present invention in a parallel arrangement.
Fig. 7 is a top view of the heat exchange tube of the present invention in a tandem arrangement.
Fig. 8 is a schematic diagram of a heat exchange tube of the present invention employing a series arrangement of piping connections.
Description of the reference numerals
The underground structure supporting structure is characterized in that the underground structure supporting structure is adopted by the underground structure supporting structure, the underground structure supporting structure is adopted by the underground structure supporting structure.
Detailed Description
The technical scheme of the ground source heat pump integrated equipment based on the building underground structure and the construction method thereof provided by the invention are further described below with reference to specific embodiments and drawings thereof. The advantages and features of the present invention will become more apparent in conjunction with the following description. It should be noted that the embodiments of the present invention are preferred embodiments, and are not intended to limit the present invention in any way. The drawings of the invention are in a very simplified form and are not to scale precisely, but are for the purpose of illustrating embodiments of the invention conveniently and clearly, and are not intended to limit the scope of the invention.
Example 1: heat exchanging well parallel arrangement
As shown in fig. 1 to 6, the underground structure of the embodiment is positioned above the ground source heat pump system, has the length and width of 20m and the depth of 15m, and consists of an underground structure supporting structure 1, an underground structure outer wall 2 and an underground structure bottom plate 3, wherein the underground structure supporting structure 1 is a bored cast-in-place pile, the underground structure outer wall 2 is a reinforced concrete basement outer wall with the thickness of 1m, and the underground structure bottom plate 3 is a basement bottom plate with the thickness of 1 m;
the ground source heat pump system of the embodiment consists of a heat exchange well 4, a horizontal ditch 8 and a control machine room 14; the heat exchange well 4 consists of a double U-shaped heat exchange tube 5, backfill soil 6 and backfill coarse sand 7, the heat exchange well 4 is round, the diameter is 0.6m, and the depth is 30m; the double-U-shaped heat exchange tube 5 is made of PVC plastic, the length of the double-U-shaped heat exchange tube 5 is 122m, the double-U-shaped heat exchange tube is bent in the heat exchange well 4 three times, and the top end of the double-U-shaped heat exchange tube is exposed out of the heat exchange well 4 by about 0.5m; the backfill soil 6 is positioned at the lower part of the heat exchange well 4, the filling depth is 28m for filling soil in the heat exchange well 4, the backfill coarse sand 7 is positioned at the upper part of the heat exchange well 4, and the filling depth is 2m; the 16 heat exchange wells 4 work together and are arranged in a square shape, and are connected with the control machine room 14 through the horizontal grooves 8 in a parallel mode, and the distance between the heat exchange wells 4 is 4m;
The horizontal ditch 8 is positioned below the underground structure bottom plate 3 and consists of a horizontal heat exchange tube 9, fine sand 10, graded broken stone 11, a hot water circulation tube 12 and a cold water circulation tube 13, the section of the horizontal ditch 8 is in the form of an inverted trapezoid section with the upper side length of 2m, the lower side length of 0.5m and the height of 1.5m, the lower part is filled with fine sand 10 materials, the fine sand 10 is 0.5m, the upper part is filled with graded broken stone 11 materials, the height is 1.5m, and the horizontal heat exchange tube 9, the hot water circulation tube 12 and the cold water circulation tube 13 are embedded in the fine sand 10 at the lower part;
as shown in fig. 5 and 6, the heat exchange wells 4 are connected in parallel, a hot water circulation pipe 12 and a cold water circulation pipe 13 are laid in parallel in the horizontal ditch 8, two ends of the double-U-shaped heat exchange pipe 5 of each heat exchange well 4 are respectively connected with the hot water circulation pipe 12 and the cold water circulation pipe 13 through two horizontal heat exchange pipes 9 to form a parallel loop, circulating water firstly uniformly flows into the cold water circulation pipe 13 from the control machine room 14, then flows into the double-U-shaped heat exchange pipe 5 of each parallel branch heat exchange well 4 from the cold water circulation pipe 13, after heat exchange with an underground soil body, the water temperature of the circulating water rises, the double-U-shaped heat exchange pipe 5 flowing out of the heat exchange well 4 flows into the hot water circulation pipe 12, and the circulating water in the hot water circulation pipe 12 intensively flows back into the control machine room 14 to finish the collection of geothermal energy;
The control machine room 14 is positioned in the underground structure, and the lower part of the control machine room 14 penetrates through the underground bottom plate and stretches into the lower part of the underground structure bottom plate 3 for a certain distance and is used for being connected with the horizontal heat exchange tube 9, the hot water circulating tube 12 and the cold water circulating tube 13 in the horizontal ditch 8.
Example 2: heat exchanging well series arrangement
As shown in fig. 1 to 4, 7 and 8, the underground structure of the embodiment is positioned above the ground source heat pump system, has the length and width of 20m and the depth of 15m, and consists of an underground structure supporting structure 1, an underground structure outer wall 2 and an underground structure bottom plate 3, wherein the underground structure supporting structure 1 is a bored pile, the underground structure outer wall 2 is a reinforced concrete basement outer wall with the thickness of 1m, and the underground structure bottom plate 3 is a basement bottom plate with the thickness of 1 m;
the ground source heat pump system of the embodiment consists of a heat exchange well 4, a horizontal ditch 8 and a control machine room 14; the heat exchange well 4 consists of a double U-shaped heat exchange tube 5, backfill soil 6 and backfill coarse sand 7, the heat exchange well 4 is round, the diameter is 0.6m, and the depth is 30m; the double-U-shaped heat exchange tube 5 is made of PVC plastic, the length of the double-U-shaped heat exchange tube 5 is 122m, the double-U-shaped heat exchange tube is bent in the heat exchange well 4 three times, and the top end of the double-U-shaped heat exchange tube is exposed out of the heat exchange well 4 by about 0.5m; the backfill soil 6 is positioned at the lower part of the heat exchange well 4, the filling depth is 28m for filling soil in the heat exchange well 4, the backfill coarse sand 7 is positioned at the upper part of the heat exchange well 4, and the filling depth is 2m; the 16 heat exchange wells 4 work together and are arranged in a square shape, and are connected with the control machine room 14 through the horizontal grooves 8 in a parallel mode, and the distance between the heat exchange wells 4 is 4m;
the horizontal ditch 8 is positioned below the underground structure bottom plate 3 and consists of a horizontal heat exchange tube 9, fine sand 10 and graded broken stone 11, the section of the horizontal ditch 8 is in the form of an inverted trapezoid section with the upper side length of 2m, the lower side length of 0.5m and the height of 1.5m, the lower part is filled with fine sand 10 materials, the fine sand 10 is 0.5m in height, the upper part is filled with graded broken stone 11 materials, the height is 1.5m, and the horizontal heat exchange tube 9 is embedded in the fine sand 10 at the lower part;
The heat exchange wells 4 are connected in series, two ends of the double-U-shaped heat exchange tubes 5 of the 16 heat exchange wells 4 are connected end to end through the horizontal heat exchange tubes 9 to form a series loop, two ends of the loop are connected with the control machine room 14, circulating water flows out of the control machine room 14, sequentially passes through the double-U-shaped heat exchange tubes 5 of each heat exchange well 4 on the series loop to complete a heat exchange process, and finally flows back to the control machine room 14 to complete the collection of geothermal energy;
The control machine room 14 is positioned in the underground structure, and the lower part of the control machine room 14 penetrates through the underground bottom plate and stretches into the lower part of the underground structure bottom plate 3 for a certain distance and is used for being connected with the horizontal heat exchange tube 9, the hot water circulating tube 12 and the cold water circulating tube 13 in the horizontal ditch 8.
The above description is only illustrative of the preferred embodiments of the invention and is not intended to limit the scope of the invention in any way. Any alterations or modifications of the invention, which are obvious to those skilled in the art based on the teachings disclosed above, are intended to be equally effective embodiments, and are intended to be within the scope of the appended claims.
Claims (2)
1. Ground source heat pump integration equipment based on building underground structure, its characterized in that: the ground source heat pump integrated technology based on the building underground structure consists of a building underground structure and a ground source heat pump system;
The underground structure is positioned above the ground source heat pump system and consists of an underground structure supporting structure (1), an underground structure outer wall (2) and an underground structure bottom plate (3), wherein the underground structure supporting structure (1) is a supporting pile or an underground continuous wall structure with supporting function during foundation pit construction, the underground structure outer wall (2) is a reinforced concrete basement outer wall with a certain thickness, the underground structure bottom plate (3) is a basement bottom plate with a certain thickness, the underground structure bottom plate has enough strength and rigidity, and the underground structure outer wall (2), the underground structure bottom plate (3) and an internal supporting structure thereof jointly form an underground structure space to play a role in supporting the upper structure of a building;
The ground source heat pump system consists of a heat exchange well (4), a horizontal ditch (8) and a control machine room (14);
The heat exchange well (4) consists of a double U-shaped heat exchange tube (5), backfill soil (6) and backfill coarse sand (7), the space of the heat exchange well (4) is a slender vertical column space formed in soil body below an underground structure by adopting a drilling method, and the depth of the heat exchange well (4) is determined according to the condition of local geothermal resources and soil conditions; the double-U-shaped heat exchange tube (5) is a pipeline which is arranged in the heat exchange well (4) and used for flowing heat exchange water, plastic materials or metal materials are adopted, the length of the double-U-shaped heat exchange tube (5) is four times of the length of the heat exchange well (4), the double-U-shaped heat exchange tube is bent in the heat exchange well (4) three times in a U shape, and the heat exchange water in the double-U-shaped heat exchange tube (5) flows through the whole heat exchange well (4) four times so as to fully utilize geothermal resources; the backfill soil (6) is positioned at the lower part of the heat exchange well (4), the filling depth is slightly smaller than the depth of the heat exchange well (4) for filling the soil body in the heat exchange well (4), the backfill coarse sand (7) is positioned at the upper part of the heat exchange well (4), the filling depth is smaller, and the backfill soil (6) and the backfill coarse sand (7) enable the double-U-shaped heat exchange tube (5) to be fully contacted with the surrounding soil body; the heat exchange wells (4) work together and are arranged in a square shape or a quincuncial shape, the heat exchange wells are connected with the control machine room (14) through the horizontal grooves (8) in parallel or in series, the distance between the heat exchange wells (4) is 4-5 m, and the specific arrangement mode is determined according to the underground structure form, geothermal resource condition and soil geological condition;
The horizontal ditch (8) is positioned below the underground structure bottom plate (3) and is of a horizontal structure of the connected heat exchange well (4) and the control machine room (14), the horizontal ditch (8) consists of a horizontal heat exchange tube (9), fine sand (10), graded broken stone (11), a hot water circulating tube (12) and a cold water circulating tube (13), the horizontal ditch (8) adopts an inverted trapezoid cross section, the lower part is filled with fine sand (10) materials, the upper part is filled with graded broken stone (11) materials, and the horizontal heat exchange tube (9) or the hot water circulating tube (12) and the cold water circulating tube (13) are embedded in the fine sand (10) at the lower part;
If the heat exchange wells (4) are connected in parallel, a hot water circulation pipe (12) and a cold water circulation pipe (13) are paved in parallel in the horizontal ditch (8), two ends of the double-U-shaped heat exchange pipe (5) of each heat exchange well (4) are respectively connected with the hot water circulation pipe (12) and the cold water circulation pipe (13) through two horizontal heat exchange pipes (9) to form a parallel loop, circulating water firstly uniformly flows into the cold water circulation pipe (13) from the control machine room (14), then flows into the double-U-shaped heat exchange pipe (5) of each parallel branch heat exchange well (4) from the cold water circulation pipe (13), after heat exchange with an underground soil body, the water temperature of circulating water rises, the double-U-shaped heat exchange pipe (5) flowing out of the heat exchange well (4) flows into the hot water circulation pipe (12), and the circulating water in the hot water circulation pipe (12) intensively flows back into the control machine room (14) to finish collection of geothermal energy;
if the heat exchange wells (4) are connected in series, two ends of the double-U-shaped heat exchange tubes (5) of the plurality of heat exchange wells (4) are connected end to end through the horizontal heat exchange tubes (9) to form a series loop, two ends of the loop are connected with the control machine room (14), circulating water flows out of the control machine room (14) and sequentially passes through the double-U-shaped heat exchange tubes (5) of each heat exchange well (4) in the series loop to complete a heat exchange process, and finally flows back to the control machine room (14) to complete collection of geothermal energy sources;
The heat exchange wells (4) are connected in parallel, so that the heat exchange wells (4) are generally suitable for the conditions of large number and large arrangement area; the heat exchange wells (4) are connected in series, so that the heat exchange wells (4) are generally suitable for the conditions of less heat exchange wells (4) and smaller arrangement area;
The control machine room (14) is a room for arranging a heat exchange pump and a control device facility and is used for operating control staff, the control machine room (14) is located in an underground structure, the lower part of the control machine room (14) penetrates through an underground bottom plate and stretches into the lower part of the underground structure bottom plate (3) for a certain distance, and the control machine room is used for being connected with a horizontal heat exchange pipe (9), a hot water circulating pipe (12) and a cold water circulating pipe (13) in a horizontal ditch (8).
2. The construction method of the ground source heat pump integrated equipment based on the building underground structure of claim 1 mainly comprises 8 steps:
① And (3) preparation of construction: whether underground pipelines, pile foundations or other structures exist in a drilling area or not is investigated, the arrangement scheme and the construction sequence of a heat exchange well (4) and a horizontal ditch (8) are determined, supporting structure construction is carried out according to a conventional construction method, and a foundation pit is excavated to a designed depth;
② Drilling a heat exchange well: after the construction of the underground structure supporting structure (1) is completed, drilling the heat exchange wells (4) on the flat foundation pit ground, and drilling each heat exchange well (4) to the designed depth according to the design requirement;
③ And (3) lowering the heat exchange tube: the folded double-U-shaped heat exchange tube (5) is placed into the hole of the heat exchange well (4) to ensure that the double-U-shaped heat exchange tube extends to the designed depth, and the length of the double-U-shaped heat exchange tube (5) is slightly longer than the depth of the hole of the heat exchange well (4) so that the double-U-shaped heat exchange tube can be exposed for a certain length to facilitate subsequent construction;
④ Backfilling a heat exchange well: filling and sealing holes from bottom to top in grouting, ensuring that drilling grouting is compact and free of cavities, forming backfill soil (6) after mud in the well is precipitated, and filling and compacting the upper part of the heat exchange well (4) by backfill coarse sand (7);
⑤ Horizontal ditch construction: excavating a horizontal ditch (8) connecting each heat exchange well (4) and a control machine room (14) according to a design scheme, and paving fine sand (10) with a certain thickness in the horizontal ditch (8); according to the design scheme, a horizontal heat exchange tube (9), a hot water circulating tube (12) and a cold water circulating tube (13) are paved and connected, the horizontal tubes are connected with each heat exchange well (4), and one end of each horizontal tube, which is close to a control machine room (14), is reserved with enough length, and a hydraulic test is performed in time to check the tightness of all the pipelines; sequentially filling fine sand (10) and graded broken stone (11) into the horizontal ditch (8), and fully compacting;
⑥ Constructing a bottom plate of an underground structure: carrying out construction of an underground structure bottom plate (3) according to a conventional procedure, and reserving a space for controlling a machine room (14) on the underground structure bottom plate (3);
⑦ And (3) controlling construction of a machine room: carrying out reinforced concrete structure construction of the control machine room (14) according to conventional procedures; installing a horizontal pipeline in the horizontal ditch (8) into a control machine room (14) in time, and installing a heat exchange pump and control device facilities in the control machine room (14);
⑧ And (5) continuing construction of the underground structure: and carrying out all construction of the residual underground structure according to the conventional procedures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194896.4A CN111691452B (en) | 2019-03-14 | 2019-03-14 | Ground source heat pump integrated equipment based on building underground structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194896.4A CN111691452B (en) | 2019-03-14 | 2019-03-14 | Ground source heat pump integrated equipment based on building underground structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111691452A CN111691452A (en) | 2020-09-22 |
| CN111691452B true CN111691452B (en) | 2024-04-19 |
Family
ID=72475261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910194896.4A Active CN111691452B (en) | 2019-03-14 | 2019-03-14 | Ground source heat pump integrated equipment based on building underground structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111691452B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100985854B1 (en) * | 2010-05-31 | 2010-10-08 | 코오롱환경서비스주식회사 | Method for constructing grouting of closed-loop vertical ground heat exchanger |
| CA2759437A1 (en) * | 2009-04-20 | 2010-10-28 | Anzoic Energy Inc. | Subterranean continuous loop heat exchanger, method of manufacture and method to heat, cool or store energy with same |
| CN103161162A (en) * | 2013-03-12 | 2013-06-19 | 中国京冶工程技术有限公司 | Anti-floating anchor rod capable of collecting ground source heat energy and construction method |
| CN104278669A (en) * | 2014-10-23 | 2015-01-14 | 南京工业大学 | Prefabricated reinforced concrete pipe pile with double-semicircle W parallel heat exchanger of ground source heat pump |
| CN108166486A (en) * | 2018-02-06 | 2018-06-15 | 湖北工业大学 | Deep layer buried tube type prefabrication type energy pile pile and its construction technology |
| JP2018145606A (en) * | 2017-03-01 | 2018-09-20 | 株式会社大林組 | Groundwater utilization system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130087306A1 (en) * | 2011-10-09 | 2013-04-11 | Bernard Meredith Winn, JR. | Forced Insertion Concentric Ground-Coupled Heat Exchanger for Ground Source Heat Pumps |
-
2019
- 2019-03-14 CN CN201910194896.4A patent/CN111691452B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2759437A1 (en) * | 2009-04-20 | 2010-10-28 | Anzoic Energy Inc. | Subterranean continuous loop heat exchanger, method of manufacture and method to heat, cool or store energy with same |
| KR100985854B1 (en) * | 2010-05-31 | 2010-10-08 | 코오롱환경서비스주식회사 | Method for constructing grouting of closed-loop vertical ground heat exchanger |
| CN103161162A (en) * | 2013-03-12 | 2013-06-19 | 中国京冶工程技术有限公司 | Anti-floating anchor rod capable of collecting ground source heat energy and construction method |
| CN104278669A (en) * | 2014-10-23 | 2015-01-14 | 南京工业大学 | Prefabricated reinforced concrete pipe pile with double-semicircle W parallel heat exchanger of ground source heat pump |
| JP2018145606A (en) * | 2017-03-01 | 2018-09-20 | 株式会社大林組 | Groundwater utilization system |
| CN108166486A (en) * | 2018-02-06 | 2018-06-15 | 湖北工业大学 | Deep layer buried tube type prefabrication type energy pile pile and its construction technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111691452A (en) | 2020-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102587365B (en) | Method for embedding precession-type backfill grouting ground source thermal energy conversion precast pile device into stratum | |
| CN108166486B (en) | Deep buried pipe type prefabricated energy pipe pile and construction process thereof | |
| US12000626B2 (en) | Geothermal development system and the construction method thereof | |
| CN103383018A (en) | Construction method for embedding pipe in ground source heat pump pouring pile reinforcement cage | |
| CN201116803Y (en) | Ground source heat pump imbedded pipe heat-exchanging pile device | |
| CN102808405B (en) | PCC (Large Diameter Pipe Pile by using Cast-in-place Concrete) energy pile and manufacturing method thereof | |
| Ren et al. | Field tests on thermal response characteristics of micro-steel-pipe pile under multiple temperature cycles | |
| CN202543904U (en) | Screw-in wall-post-grouting precast pile device for ground-source heat energy conversion | |
| CN101182711A (en) | Shallow layer geothermal energy converting anchor rod | |
| CN110593303B (en) | Prefabricated reinforced concrete fixed buttress for thermal pipeline and construction method | |
| CN1944807A (en) | Heat insulation type multiple group tubular heat exchanger geo-energy converting prestress concrete tubular pile | |
| CN107447749A (en) | A kind of heat-exchange system and construction technology based on deep layer pipe laying and energy pile | |
| CN204063686U (en) | Buried tube type underground heat exchange structure is disturbed in a kind of cyclic group hole | |
| CN1800510A (en) | Prestressing force concrete pipe pile for low-temperature geothermal energy conversion | |
| CN207761667U (en) | A kind of supporting construction for tunnel reconstruction and extension project | |
| CN108589708A (en) | A kind of Multifunctional cast-in-situ major diameter foundation pit support pipe pile and ground temperature exchange system | |
| CN105927271A (en) | Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers | |
| CN111691452B (en) | Ground source heat pump integrated equipment based on building underground structure and construction method thereof | |
| CN109557128B (en) | Simulation test box for freezing construction | |
| CN206768807U (en) | A kind of heat-exchange system based on deep layer pipe laying and energy pile | |
| CN210917333U (en) | Energy pile system | |
| CN104912068A (en) | Hollow circular truncated cone spiral energy pile structure capable of improving heat transfer efficiency | |
| CN1944806A (en) | Low temperature geothermal energy converting cement and earth wet stirring pile | |
| CN211650816U (en) | Prefabricated energy pile application structure | |
| Liu et al. | Vertical U-shaped heat exchangers for construction engineering: New promises and future challenges |
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 |