CN112129011A - Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump and pipe distribution method - Google Patents
Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump and pipe distribution method Download PDFInfo
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- CN112129011A CN112129011A CN202011115373.5A CN202011115373A CN112129011A CN 112129011 A CN112129011 A CN 112129011A CN 202011115373 A CN202011115373 A CN 202011115373A CN 112129011 A CN112129011 A CN 112129011A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009412 basement excavation Methods 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims description 32
- 230000000694 effects Effects 0.000 abstract description 11
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T50/00—Geothermal systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T2010/50—Component parts, details or accessories
- F24T2010/53—Methods for installation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a calandria structure capable of relieving heat interference of horizontal pipe burying of a ground source heat pump and a pipe arrangement method. The invention can greatly improve the heat exchange efficiency of the horizontal pipe on the prior basis and reduce the adverse effect caused by thermal interference among pipelines; according to the method, after the depth of the two layers of buried pipes is determined, the depth of the excavated groove becomes shallow, and the early-stage excavation cost is reduced in a certain degree of layer; the use effect is good.
Description
Technical Field
The invention relates to a pipe distribution method for a horizontal pipe burying of a ground source heat pump, in particular to a calandria structure capable of relieving heat interference of the horizontal pipe burying of the ground source heat pump and a pipe distribution method, and belongs to the technical field of ground source heat pumps.
Background
The ground source heat pump system utilizes the energy storage of the ground to achieve ground source heat balance, and has the advantages of environmental protection, high efficiency, low cost and the like, the initial investment of the horizontal pipe burying system of the ground source heat pump system is less than that of a vertical pipe burying, the horizontal pipe burying system is widely popularized and applied in the whole world, and a plurality of problems are accompanied, the horizontal pipe is limited by the area for laying the pipeline, the smaller the available area is, the more dense the pipeline laying is, the obvious thermal interference phenomenon among pipelines is, and the heat exchange effect is poor.
To solve the thermal interference between horizontal pipes, various measures have been proposed by many scholars, and the most effective method among them is to increase the distance between the pipes, but this method increases the land area, and when the available land area is small, this method does not substantially solve the problem.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a can alleviate ground source heat pump horizontal pipe laying thermal interference calandria structure and piping method, through arranging the pipeline into equilateral triangle arrangement, the centre-to-centre spacing is twice single pipe heat influence radius between the pipeline, can improve horizontal pipe heat exchange efficiency greatly, reduces the adverse effect that thermal interference brought between the pipeline, has solved the problem that exists above-mentioned.
The technical scheme of the invention is as follows: the utility model provides a can alleviate horizontal pipe laying thermal interference calandria structure of ground source heat pump, it includes pipeline, frozen soil layer and trench, the pipeline is located the trench, and frozen soil layer is located the trench top, and the pipeline is located frozen soil layer below, and the pipeline is established to two-layer upper and lower arranging and is equilateral triangle and arranges.
The distance between the pipe walls of two adjacent horizontal pipes of the pipeline is equal to 2L, and the vertical height between the upper layer of pipeline and the lower layer of pipeline is
Wherein L is the single tube heat affected radius.
The outer wall of the pipeline on the outer side of the lower layer is in contact with the wall of the pipe ditch, and the outer wall of the pipeline on the upper layer is in contact with the bottom end face of the frozen soil layer.
One pipeline is arranged on the upper layer, and two pipelines are arranged on the lower layer.
Two pipelines are arranged on the upper layer, and three pipelines are arranged on the lower layer.
A pipe distribution method capable of relieving heat interference of a horizontal buried pipe of a ground source heat pump comprises the following steps: firstly, determining the required embedding length of a horizontal buried pipe of the buried pipe; secondly, determining the heat affected radius L of the single horizontal pipe; determining the thickness H of the local permafrost layer or determining H by experience value, wherein H is the thickness of the first layer of pipe from the earth surface and generally takes a value of 0.8-1.2; fourthly, determining the first layer embedding depth of the horizontal pipe according to the thickness H of the frozen soil layer; fifthly, determining the embedding depth of the second layer of horizontal pipes according to the value of the heat influence radius L of the single pipe; and sixthly, determining the depth, width and length of the pipe trench to be excavated.
The depth of the pipe trench is
Wherein H is the thickness of the frozen soil layer. Can save the trench excavation depth
The invention has the beneficial effects that: compared with the prior art, the technical scheme of the invention (1) can greatly improve the heat exchange efficiency of the horizontal pipe on the prior basis and reduce the adverse effect caused by thermal interference among pipelines; (2) according to the method, after the depth of the two layers of buried pipes is determined, the depth of the excavated groove becomes shallow, the early-stage excavation cost is reduced on a certain layer degree, and the unit cost can be reduced by about 15%; (3) the method has wider practicability, obtains larger heat gain, reduces the cost and saves the economy; the use effect is good.
Drawings
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Example 1: as shown in the attached drawing 1, the calandria structure capable of relieving the horizontal pipe burying thermal interference of the ground source heat pump comprises a pipeline 3, a frozen soil layer 1 and a pipe ditch 2, wherein the pipeline 3 is located in the pipe ditch 2, the frozen soil layer 1 is located at the top of the pipe ditch 2, the pipeline 3 is located below the frozen soil layer 1, and the pipeline 3 is arranged in an upper layer and a lower layer and is arranged in an equilateral triangle.
Further, the distance between the pipe walls of two adjacent horizontal pipes of the pipeline 3 is equal to 2L, and the vertical height between the upper layer of the pipeline 3 and the lower layer of the pipeline 3 is
Wherein L is the single tube heat affected radius.
Further, the outer wall of the outer side pipeline 3 on the lower layer is in contact with the wall of the pipe ditch 2, and the outer wall of the pipeline 3 on the upper layer is in contact with the bottom end face of the frozen soil layer 1. The arrangement can reduce the excavation amount of the pipe trench as much as possible without influencing the heat exchange effect of the pipeline.
Furthermore, one pipeline 3 is arranged on the upper layer, and two pipelines are arranged on the lower layer.
A pipe distribution method capable of relieving heat interference of a horizontal buried pipe of a ground source heat pump comprises the following steps: firstly, determining the required embedding length of a horizontal buried pipe of the buried pipe; secondly, determining the heat affected radius L of the single horizontal pipe; thirdly, determining the thickness H of the local permafrost layer 1; fourthly, determining the first layer embedding depth of the horizontal pipe according to the thickness H of the frozen soil layer 1; fifthly, determining the embedding depth of the second layer of horizontal pipes according to the value of the heat influence radius L of the single pipe; sixthly, determining the depth, width and length of the pipe trench 2 to be excavated.
Further, the depth of the trench 2 is
Wherein H is 3 thicknesses of frozen soil layer, can practice thrift the slot excavation depth
And in the first step, the total embedded length of the horizontal pipe is calculated according to the cold and hot load.
And in the second step, the single pipe heat affected radius L can be determined according to actual measurement or can be selected according to a design manual.
In the third step, due to regional differences, the thickness H of the frozen soil layer 1 is different in each region, data needs to be consulted or determined by actual measurement, and the frozen soil layer does not exist in some places, so that the general experience value H is 0.8-1.2 m.
In the fourth step, the first layer of horizontal pipes is positioned below the frozen soil line H;
the distance between the upper layer of horizontal pipe and the lower layer of horizontal pipe in the step five
Instead of 2L;
in the sixth step, the excavation depth of the pipe trench 2 is changed from 2L + H to shallow
Wherein H is the thickness of the frozen soil layer, so as to save the excavation depth
The excavation width of the pipe trench 2 is 2L. The cost of the excavation unit can be reduced by about 15%, the construction cost is saved, and the effect is good.
Example 2: as shown in the attached drawing 2, the calandria structure capable of relieving the horizontal pipe burying thermal interference of the ground source heat pump comprises a pipeline 3, a frozen soil layer 1 and a pipe ditch 2, wherein the pipeline 3 is located in the pipe ditch 2, the frozen soil layer 1 is located at the top of the pipe ditch 2, the pipeline 3 is located below the frozen soil layer 1, and the pipeline 3 is arranged in an upper layer and a lower layer and is arranged in an equilateral triangle.
Further, the distance between the pipe walls of two adjacent horizontal pipes of the pipeline 3 is equal to 2L, and the vertical height between the upper layer of the pipeline 3 and the lower layer of the pipeline 3 is
Wherein L is the single tube heat affected radius.
Further, the outer wall of the outer side pipeline 3 on the lower layer is in contact with the wall of the pipe ditch 2, and the outer wall of the pipeline 3 on the upper layer is in contact with the bottom end face of the frozen soil layer 1. The arrangement can reduce the excavation amount of the pipe trench as much as possible without influencing the heat exchange effect of the pipeline.
Furthermore, two pipelines 3 are arranged on the upper layer and three pipelines are arranged on the lower layer.
A pipe distribution method capable of relieving heat interference of a horizontal buried pipe of a ground source heat pump comprises the following steps: firstly, determining the required embedding length of a horizontal buried pipe of the buried pipe; secondly, determining the heat affected radius L of the single horizontal pipe; thirdly, determining the thickness H of the local permafrost layer 1; fourthly, determining the first layer embedding depth of the horizontal pipe according to the thickness H of the frozen soil layer 1; fifthly, determining the embedding depth of the second layer of horizontal pipes according to the value of the heat influence radius L of the single pipe; sixthly, determining the depth, width and length of the pipe trench 2 to be excavated.
Further, the depth of the trench 2 is
Wherein H is the thickness of the frozen soil layer, so that the excavation depth can be saved
And in the first step, the total embedded length of the horizontal pipe is calculated according to the cold and hot load.
And in the second step, the single pipe heat affected radius L can be determined according to actual measurement or can be selected according to a design manual.
In the third step, due to regional differences, the thickness H of the frozen soil layers 1 in different regions is different, and data needs to be consulted or determined by actual measurement. In some places, no permafrost layer exists, so the general empirical value H is 0.8-1.2 m.
In the fourth step, the first layer of horizontal pipes is positioned below the frozen soil line H;
step five, spacing between two layers of horizontal pipes
Instead of 2L;
in the sixth step, the excavation depth of the pipe trench 2 is changed from 2L + H to shallow
Wherein H is the thickness of the frozen soil layer, so as to save the excavation depth
The excavation width of the pipe trench 2 is 4L. The cost of the excavation unit can be reduced by about 15%, the construction cost is saved, and the effect is good.
A horizontal ground source heat pump system is installed in a library of a university in Guizhou, and a large amount of open ground is arranged in the front of the library, so that a buried pipe is buried in the open ground. Because this area summer is comparatively hot, and the demand to cold and hot volume is great, in view of can laying the pipeline area limited, need rationally arrange the pipeline arrangement mode, for solving this problem, provide an effectual calandria mode, adopt three pipe layering dislocation arrangements of single ditch, the ditch groove excavation degree of depth is practiced thrift to this mode, can avoid the thermal interference phenomenon between the pipeline simultaneously.
After the construction is finished by adopting the method, the result shows that compared with a single pipe with a single ditch, the method can lay more pipelines for heat exchange, the heat exchange capacity is enhanced, and the unit heat exchange effect is improved by about 20 percent. Compared with a single-groove four-pipe pipeline, the mode reasonably avoids the influence caused by thermal interference among pipelines on the effective pipeline laying area,
in conclusion, the invention can enhance the heat exchange strength between the horizontal pipe and the soil body, save the available land area, furthest increase the buried pipelines while considering the thermal interference, and simultaneously has the advantages of simple and convenient construction, environmental protection and the like.
The present invention is not described in detail, but is known to those skilled in the art. Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a can alleviate horizontal pipe laying thermal interference calandria structure of ground source heat pump, it includes pipeline (3), frozen soil layer (1) and trench (2), its characterized in that: pipeline (3) are located trench (2), and frozen soil layer (1) are located trench (2) top, and pipeline (3) are located frozen soil layer (1) below, and pipeline (3) are established to arrange for upper and lower two-layer and are equilateral triangle and arrange.
2. The calandria structure capable of alleviating thermal interference of horizontal buried pipes of ground source heat pump according to claim 1, wherein the calandria structure is characterized in thatIn the following steps: the distance between the pipe walls of two adjacent horizontal pipes of the pipeline (3) is equal to 2L, and the vertical height between the upper layer of pipeline (3) and the lower layer of pipeline (3) is
Wherein L is the single tube heat affected radius.
3. The calandria structure capable of alleviating thermal interference of the horizontal buried pipe of the ground source heat pump according to claim 1 or 2, wherein: the outer wall of the outer pipeline (3) on the lower layer is contacted with the wall of the pipe ditch (2), and the outer wall of the pipeline (3) on the upper layer is contacted with the bottom end surface of the frozen soil layer (1).
4. The calandria structure capable of alleviating thermal interference of the horizontal buried pipe of the ground source heat pump according to claim 1 or 2, wherein: one pipeline (3) is arranged on the upper layer, and two pipelines are arranged on the lower layer.
5. The calandria structure capable of alleviating thermal interference of the horizontal buried pipe of the ground source heat pump according to claim 1 or 2, wherein: two pipelines (3) are arranged on the upper layer, and three pipelines are arranged on the lower layer.
6. The pipe distribution method capable of alleviating the horizontal buried pipe thermal interference of the ground source heat pump according to claim 1 or 2, wherein: the method comprises the following steps: firstly, determining the required embedding length of a horizontal buried pipe of the buried pipe; secondly, determining the heat affected radius L of the single horizontal pipe; thirdly, determining the thickness of the local permafrost layer (1); fourthly, determining the first layer embedding depth of the horizontal pipe according to the thickness H of the frozen soil layer (1); fifthly, determining the embedding depth of the second layer of horizontal pipes according to the value of the heat influence radius L of the single pipe; sixthly, determining the depth, width and length of the pipe trench (2) to be excavated.
7. The pipe distribution method capable of alleviating the horizontal buried pipe thermal interference of the ground source heat pump according to claim 6, wherein: the excavation depth of the pipe trench (2) is
Wherein H is the thickness of the frozen soil layer (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011115373.5A CN112129011A (en) | 2020-10-19 | 2020-10-19 | Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump and pipe distribution method |
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| CN202011115373.5A CN112129011A (en) | 2020-10-19 | 2020-10-19 | Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump and pipe distribution method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201935480U (en) * | 2011-01-28 | 2011-08-17 | 南京丰盛新能源科技股份有限公司 | ground heat exchanger for preventing thermal short circuit between underground pipes |
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| CN203629136U (en) * | 2013-10-15 | 2014-06-04 | 郑州大学 | Double-U-shaped ground pipe heat exchanger with bundled outlet branch pipes |
| CN206300382U (en) * | 2016-12-15 | 2017-07-04 | 南京丰盛新能源科技股份有限公司 | A kind of villa land used source heat pump heat exchanging system |
| CN208917823U (en) * | 2018-06-07 | 2019-05-31 | 陆见华 | A kind of X-type precast energy pile |
| CN209279417U (en) * | 2018-10-29 | 2019-08-20 | 扬州大学 | A kind of high efficiency levels screw type ground heat exchanger |
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| CN210374136U (en) * | 2019-07-22 | 2020-04-21 | 北京市华清地热开发集团有限公司 | Outdoor heat exchange system and air conditioning system |
| CN213631061U (en) * | 2020-10-19 | 2021-07-06 | 贵州大学 | Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump |
-
2020
- 2020-10-19 CN CN202011115373.5A patent/CN112129011A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201935480U (en) * | 2011-01-28 | 2011-08-17 | 南京丰盛新能源科技股份有限公司 | ground heat exchanger for preventing thermal short circuit between underground pipes |
| CN202166233U (en) * | 2011-07-11 | 2012-03-14 | 北京圣兆科技开发有限公司 | Horizontal ground heat exchanger in multi-layer arrangement |
| CN103034768A (en) * | 2012-12-25 | 2013-04-10 | 华汇工程设计集团股份有限公司 | Design method of buried heat exchange system |
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| CN208917823U (en) * | 2018-06-07 | 2019-05-31 | 陆见华 | A kind of X-type precast energy pile |
| US20200033014A1 (en) * | 2018-07-30 | 2020-01-30 | John P. Ballegeer | Concentric pipe geothermal heat exchanger well head |
| CN209279417U (en) * | 2018-10-29 | 2019-08-20 | 扬州大学 | A kind of high efficiency levels screw type ground heat exchanger |
| CN210374136U (en) * | 2019-07-22 | 2020-04-21 | 北京市华清地热开发集团有限公司 | Outdoor heat exchange system and air conditioning system |
| CN213631061U (en) * | 2020-10-19 | 2021-07-06 | 贵州大学 | Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump |
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