CN103322832A - Ground source heat pump efficient heat exchanger and construction method thereof - Google Patents
Ground source heat pump efficient heat exchanger and construction method thereof Download PDFInfo
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- CN103322832A CN103322832A CN2013102749937A CN201310274993A CN103322832A CN 103322832 A CN103322832 A CN 103322832A CN 2013102749937 A CN2013102749937 A CN 2013102749937A CN 201310274993 A CN201310274993 A CN 201310274993A CN 103322832 A CN103322832 A CN 103322832A
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Abstract
The invention discloses a ground source heat pump efficient heat exchanger and a construction method thereof. The ground source heat pump efficient heat exchanger is characterized in that a sleeve structure is arranged in a bored well, an outer sleeve in the sleeve structure is a steel pipe, the steel pipe with the sealed bottom is taken as a supporting and protecting pipe in the bored well, an internal pipe in the sleeve structure is a PE (polyethylene) straight pipe with the through bottom, and an annular clamping sleeve is formed between the steel pipe and the PE straight pipe. Compared with conventional double-U-shaped-pipe heat exchangers, the ground source heat pump efficient heat exchanger has the advantages that single-well heat exchanging efficiency is improved by 3-5 times, the number and the used land area of the conventional heat exchangers are greatly reduced, and the ground source heat pump efficient heat exchanger has certain reparability.
Description
Technical field
The invention belongs to renewable new energy development and utilize the field, be specifically related to efficient source, the ground energy that utilizes, for building supplies warm refrigeration.
Technical background
Studies show that, be formed at the earth before 4,600,000,000 years, in very long evolutionary process, a large amount of energy has been assembled in its inside, and its core megadyne temperature degree is gone back Gao Yiqian than 5500 ℃ on sun surface and spent more up to 6880 ℃.The huge power of its energy that volcano eruption has allowed human direct feeling.
Probing and measurement demonstration, the temperature of earth's surface below 20 meters has not been subjected to the impact of solar radiation, and each depth layer temperature is controlled by earth's core conduction heat, and is invariable throughout the year.Downward 100 meters, earth's surface are 19-20 ℃, 200 meters 21-22 ℃, and 100 meters of the every increases of the degree of depth, temperature increases approximately 3 ℃, except the colcanism area of geothermal anomaly.This shows, source, ground energy reserves are huge, widely distributed, clean environment firendly, and geothermal heat pump air-conditioning system can provide possibility for the mankind use the source, ground.
In China, building energy consumption accounts for 1/3 of whole society's total energy consumption at present, and maximum energy consumption was heating and refrigeration during building used, and accounts for the low 50-70% of building total energy consumption.The developed country close with weather conditions compares, and China's every square metre of heating energy consumption of building is 3 times of developed country, and along with improving constantly of life comfort standard, building energy consumption also will sharp rise.Geothermal heat pump air-conditioning system compares about energy-conservation about 50% with conventional air-conditioning.
Geothermal heat pump air-conditioning system mainly comprises outdoor underground heat exchange system, earth source heat pump unit and three parts of room conditioning end system.
At present, the manufacturing technology comparative maturity of power supply source pump and room conditioning end system, generally the unit of undertaking the construction of all possesses corresponding technical merit; The core that determines geothermal heat pump air-conditioning system reliability, security and overall efficiency is standard of construction and the heat exchange efficiency of underground heat exchange system.Domestic and foreign current heat exchanger building technology is to adopt single U pipe or double-H groove weld heat exchange of heat pipe, be 25mm or link to each other for the PE pipe bottom of 32mm with two or four diameters, be embedded in the down-hole, as shown in Figure 2, U pipe 1 directly is embedded in the basement rock 2, and the top of basement rock 2 is soil layer 4, and the tube wall outside of U pipe is backfill 3, one end of U pipe is water inlet 1a, and the other end is delivery port 1b.In this version, owing to being subjected to PE to manage the restriction of maximum pressure-bearing 16MPa, the pipe laying well depth generally is no more than 120m.There is following defective in the heat exchanger of this form:
1, heat exchange efficiency is low, floor space is large, and therefore many buildings do not possess the condition of this technology of use;
2, because heat exchanger too much and mostly is embedded in building basement, substantially do not have a recoverability;
3, under the condition of the group hole of heat exchanger, long-lasting, the stability of system require study;
4, building bottom and intensive cloth hole all around, the boring ratio ground is dark, and its impact on foundation structure requires study.
Above problem is so that 70% above new building can't adopt geothermal heat pump air-conditioning system, and old building transforming is difficult to use more.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, a kind of earth source heat pump high-performance heat exchanger and method of construction thereof are provided, to improve earth-source hot-pump system individual well exchange capability of heat, reduce the quantity of well, save the area, make ground heat exchanger possess recoverability.
The present invention is that the technical solution problem adopts following technical scheme:
The design feature of earth source heat pump high-performance heat exchanger of the present invention is: sleeve structure is set in drilling well, and outer tube in the described sleeve structure adopts steel pipe, with the steel pipe of back cover in drilling well as propping up a pillar; Built-in pipe in the sleeve structure is the PE straight tube that the bottom connects, and forms annular chuck between described steel pipe and PE straight tube, and the water stream channel that forms in described sleeve pipe is:
Current are introduced at the top of PE straight tube, from top to bottom, enter annular chuck also from bottom to top in the PE straight tube again, draw in steel pipe top;
Or current introduce in steel pipe top, from top to bottom, enter PE straight tube and from bottom to top, at the Base top contact of PE straight tube in annular chuck again.
The design feature of earth source heat pump high-performance heat exchanger of the present invention also is: described drilling depth is 125-200m, and the diameter of described steel pipe is 127-159mm, and the diameter of described PE straight tube is 26-32mm.
The characteristics of the method for construction of earth source heat pump high-performance heat exchanger of the present invention are to carry out as follows:
A, employing diameter are that the drill bit of 140-180mm is implemented drilling well, and forming the degree of depth is the vertical shaft of 125-200m;
B, the silt of flushing in the vertical shaft, the steel pipe of the end mouth sealing that lower diameter is 127-159mm in the vertical shaft, with steel pipe in vertical shaft as a pillar, with the magma backfill, steel pipe firmly and with the vertical shaft sidewall is fitted in the steel pipe outside;
C, lower diameter is the PE straight tube of 26-32mm in the steel pipe, so that between PE straight tube and steel pipe, form annular chuck, and keep the PE straight tube to be connected with annular chuck in the pipe bottom.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention arranges sleeve structure, and the increase of heat exchange area significantly improves exchange capability of heat, and the individual well exchange capability of heat is 3-5 times of double-H groove weld heat exchange of heat pipe in the prior art.
2, the present invention arranges sleeve structure, take steel pipe as a pillar, so that the PE straight tube does not directly bear pressure, therefore can increase well depth, has improved admirably the heat exchange property of heat exchanger.
3, the PE straight tube in the sleeve structure of the present invention can be changed, and its recoverability provides guarantee for the long-term stability operation of system.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the prior art structural representation;
Number in the figure: 1 is the U pipe, the 1a water inlet, and the 1b delivery port, 2 basement rock, 3 backfills, 4 soil layers, 5 steel pipes, 6 magma, 7 is the PE straight tube, 8 annular chucks.
The specific embodiment
Referring to Fig. 1, the version of the earth source heat pump high-performance heat exchanger in the present embodiment is: sleeve structure is set in drilling well, and outer tube in the described sleeve structure adopts steel pipe 5, with the steel pipe 5 of back cover in drilling well as propping up a pillar; Built-in pipe in the sleeve structure is the PE straight tube 7 that the bottom connects, and forms annular chuck 8 between steel pipe 5 and PE straight tube 7, and the water stream channel that forms in sleeve pipe is:
Current are introduced at the top of PE straight tube 7, from top to bottom, enter annular chuck 8 also from bottom to top, at the Base top contact of steel pipe 5 in the PE straight tube again;
Or current from top to bottom, enter PE straight tube 7 also from bottom to top, at the Base top contact of PE straight tube 7 in the introducing of the top of steel pipe 5 again in annular chuck 8.
In the implementation, drilling depth is 125-200 rice, and the diameter of steel pipe 5 is 127-159mm, and the diameter of PE straight tube 7 is 26-32mm.
The method of construction of earth source heat pump high-performance heat exchanger is to carry out as follows in the present embodiment:
A, employing diameter are that the drill bit of 140-180mm is implemented drilling well in basement rock 2, and forming the degree of depth is the vertical shaft of 125-200m;
Silt in b, the flushing vertical shaft, the steel pipe 5 of the end mouth sealing that lower diameter is 127-159mm in the vertical shaft, with steel pipe 5 in vertical shaft as propping up a pillar, the top of basement rock 2 is soil layer 4, with magma 6 backfills, make steel pipe 5 firm and fit with the vertical shaft sidewall in the outside of steel pipe 5;
C, lower diameter is the PE straight tube 7 of 26-32mm in the steel pipe 5, so that between PE straight tube 7 and steel pipe 5, form annular chuck 8, and keep PE straight tube 7 bottom pipe, to be connected with annular chuck 8.
Embodiment:
The design drilling depth is 200 meters, and it is that 159mm, wall thickness are the seamless steel pipe of 4mm that steel pipe is selected diameter, selects the XY-4 rig, adopts the 172mm diamond compact bit.
At drilling depth to 200 meters the time, mud is to basic clear water in the flushing manhole, be that 6m, the steel pipe that closes of pipe underseal are put into the well that cleans up with length, because the length of single steel pipe does not reach the vertical shaft degree of depth, therefore need to connect with many steel pipes, can adopt screw thread to add fluid sealant between the adjacent steel pipe and be tightly connected, until arrive the shaft bottom under the steel pipe; Backfill magma between steel pipe and drilling shaft lining makes steel pipe firm.
Lower diameter is the PE straight tube of 32mm in steel pipe, makes the end mouth of PE straight tube maintain 0.5 meter distance apart from the steel pipe bottom.At last be connected the top with the PE straight tube at steel pipe and connect respectively extension tube attached, and the open top of steel pipe sealed namely finish.
Claims (3)
1. earth source heat pump high-performance heat exchanger is characterized in that: sleeve structure is set in drilling well, and the outer tube in the described sleeve structure adopts steel pipe (5), with the steel pipe (5) of back cover in drilling well as propping up a pillar; Built-in pipe in the sleeve structure is the PE straight tube (7) that the bottom connects, and forms annular chuck (8) between described steel pipe (5) and PE straight tube (7), and the water stream channel that forms in described sleeve pipe is:
Current are introduced at the top of PE straight tube (7), from top to bottom, enter annular chuck (8) also from bottom to top, the Base top contact in steel pipe (5) in the PE straight tube again;
Or current from top to bottom, enter PE straight tube (7) also from bottom to top, the Base top contact in PE straight tube (7) in the introducing of the top of steel pipe (5) again in annular chuck (8).
2. earth source heat pump high-performance heat exchanger according to claim 1, it is characterized in that: described drilling depth is 125-200m, and the diameter of described steel pipe (5) is 127-159mm, and the diameter of described PE straight tube (7) is 26-32mm.
3. the method for construction of the described earth source heat pump high-performance heat exchanger of claim 1 is characterized in that carrying out as follows:
A, employing diameter are that the drill bit of 140-180mm is implemented drilling well, and forming the degree of depth is the vertical shaft of 125-200m;
B, the silt of flushing in the vertical shaft, the steel pipe of the end mouth sealing that lower diameter is 127-159mm in the vertical shaft, with steel pipe in vertical shaft as a pillar, with the magma backfill, steel pipe firmly and with the vertical shaft sidewall is fitted in the steel pipe outside;
C, lower diameter is the PE straight tube of 26-32mm in the steel pipe, so that between PE straight tube and steel pipe, form annular chuck, and keep the PE straight tube to be connected with annular chuck in the pipe bottom.
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| CN2013102749937A CN103322832A (en) | 2013-07-02 | 2013-07-02 | Ground source heat pump efficient heat exchanger and construction method thereof |
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| CN2013102749937A CN103322832A (en) | 2013-07-02 | 2013-07-02 | Ground source heat pump efficient heat exchanger and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374121A (en) * | 2014-12-03 | 2015-02-25 | 北京中科华誉能源技术发展有限责任公司 | Large-diameter steel sleeve heat exchange device capable of extracting geothermal energy |
| CN105651093A (en) * | 2016-03-17 | 2016-06-08 | 南京英柯森新能源技术有限公司 | Underground heat exchange tube for energy exchange system of ground-source deep well |
| CN105927271A (en) * | 2016-06-15 | 2016-09-07 | 青岛建设集团有限公司 | Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers |
| CN106767078A (en) * | 2017-01-04 | 2017-05-31 | 北京中热能源科技有限公司 | A kind of energy storage heat-exchanger rig |
| CN113775341A (en) * | 2021-11-11 | 2021-12-10 | 中国铁建重工集团股份有限公司 | Steel pipe sheet synchronous follow-up construction method suitable for shaft tunneling |
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| CN2731323Y (en) * | 2004-08-30 | 2005-10-05 | 柳溪立 | Ground energy collected heat exchange pipe |
| KR20070011836A (en) * | 2005-07-21 | 2007-01-25 | 지앤에스건설 주식회사 | Micro-pile installing geothermal pipe for heat pump |
| CN201402086Y (en) * | 2009-05-25 | 2010-02-10 | 邵年 | Ground source heat pump special tube |
| CN101984309A (en) * | 2010-11-11 | 2011-03-09 | 芜湖市科华新型材料应用有限责任公司 | Cold-heat exchange system for underground water source |
| CN102587365A (en) * | 2012-03-02 | 2012-07-18 | 中国京冶工程技术有限公司 | Precession-type backfill grouting ground source thermal energy conversion precast pile device and method for embedding precast pile device into stratum |
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2013
- 2013-07-02 CN CN2013102749937A patent/CN103322832A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731323Y (en) * | 2004-08-30 | 2005-10-05 | 柳溪立 | Ground energy collected heat exchange pipe |
| KR20070011836A (en) * | 2005-07-21 | 2007-01-25 | 지앤에스건설 주식회사 | Micro-pile installing geothermal pipe for heat pump |
| CN201402086Y (en) * | 2009-05-25 | 2010-02-10 | 邵年 | Ground source heat pump special tube |
| CN101984309A (en) * | 2010-11-11 | 2011-03-09 | 芜湖市科华新型材料应用有限责任公司 | Cold-heat exchange system for underground water source |
| CN102587365A (en) * | 2012-03-02 | 2012-07-18 | 中国京冶工程技术有限公司 | Precession-type backfill grouting ground source thermal energy conversion precast pile device and method for embedding precast pile device into stratum |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374121A (en) * | 2014-12-03 | 2015-02-25 | 北京中科华誉能源技术发展有限责任公司 | Large-diameter steel sleeve heat exchange device capable of extracting geothermal energy |
| CN105651093A (en) * | 2016-03-17 | 2016-06-08 | 南京英柯森新能源技术有限公司 | Underground heat exchange tube for energy exchange system of ground-source deep well |
| CN105927271A (en) * | 2016-06-15 | 2016-09-07 | 青岛建设集团有限公司 | Grouting backfilling system and grouting backfilling method for vertical shafts in vertical heat exchangers |
| CN106767078A (en) * | 2017-01-04 | 2017-05-31 | 北京中热能源科技有限公司 | A kind of energy storage heat-exchanger rig |
| CN113775341A (en) * | 2021-11-11 | 2021-12-10 | 中国铁建重工集团股份有限公司 | Steel pipe sheet synchronous follow-up construction method suitable for shaft tunneling |
| CN113775341B (en) * | 2021-11-11 | 2022-02-11 | 中国铁建重工集团股份有限公司 | Steel pipe sheet synchronous follow-up construction method suitable for shaft tunneling |
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Application publication date: 20130925 |