CN213631061U - Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump - Google Patents
Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump Download PDFInfo
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- CN213631061U CN213631061U CN202022321305.6U CN202022321305U CN213631061U CN 213631061 U CN213631061 U CN 213631061U CN 202022321305 U CN202022321305 U CN 202022321305U CN 213631061 U CN213631061 U CN 213631061U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model discloses a can alleviate horizontal pipe laying thermal interference calandria structure of earth 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 the frozen soil layer below, and the pipeline is established to upper and lower two-layer arranging and is equilateral triangle and arranges. The utility model can greatly improve the heat exchange efficiency of the horizontal pipe on the existing basis and reduce the adverse effect caused by the thermal interference between pipelines; the method of the utility model, after determining the depth of the two-layer buried pipe, the depth of the digging groove becomes shallow, and the early stage digging cost is reduced on a certain degree of layer, the utility model has wider practicability, and can reduce the cost and save the economy while obtaining larger heat gain; the use effect is good.
Description
Technical Field
The utility model relates to a horizontal pipe laying piping method of ground source heat pump especially relates to one kind and can alleviate the horizontal pipe laying thermal interference calandria structure of ground source heat pump, belongs to ground source heat pump technical field.
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 to-be-solved technical problem of the utility model is: the utility model provides a can alleviate ground source heat pump horizontal pipe laying thermal interference calandria structure, arranges the pipeline into equilateral triangle through arranging, and the centre-to-centre spacing is twice single pipe thermal 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 above-mentioned exists.
The technical scheme of the utility model is that: 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.
The utility model has the advantages that: compared with the prior art, the technical scheme of the utility model is adopted, (1) the utility model can greatly improve the heat exchange efficiency of the horizontal pipe on the prior basis and reduce the adverse effect caused by the thermal interference between pipelines; (2) the method of the utility model, after determining the depth of the two-layer buried pipe, the depth of the digging groove becomes shallow, the early digging cost is reduced on a certain layer degree, and the unit cost can be reduced by about 15%; (3) the utility model 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 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.
Adopt the utility model discloses a method construction finishes the back, and the result shows, than single ditch single tube, more pipelines can be laid to this mode and be used for the heat transfer, and heat exchange capacity strengthens, and unit heat transfer effect has improved about 20%. 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,
to sum up, the utility model discloses can strengthen the heat exchange intensity of horizontal pipe and the soil body, practice thrift available area, when considering thermal interference, furthest has increased and has buried the pipeline underground, has advantages such as construction simple and convenient, green again simultaneously.
The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, 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 the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (5)
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 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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129011A (en) * | 2020-10-19 | 2020-12-25 | 贵州大学 | Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump and pipe distribution method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112129011A (en) * | 2020-10-19 | 2020-12-25 | 贵州大学 | Calandria structure capable of relieving heat interference of horizontal buried pipe of ground source heat pump and pipe distribution method |
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