CN204612251U - Underground pipe, ground heat exchanger and heat-exchange system - Google Patents
Underground pipe, ground heat exchanger and heat-exchange system Download PDFInfo
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- CN204612251U CN204612251U CN201520300568.5U CN201520300568U CN204612251U CN 204612251 U CN204612251 U CN 204612251U CN 201520300568 U CN201520300568 U CN 201520300568U CN 204612251 U CN204612251 U CN 204612251U
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- underground pipe
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- 239000002184 metal Substances 0.000 claims abstract description 33
- 229920000573 polyethylene Polymers 0.000 claims abstract description 30
- 239000004698 Polyethylene Substances 0.000 claims abstract description 29
- -1 polyethylene Polymers 0.000 claims abstract description 29
- 239000002689 soil Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 description 14
- 238000003892 spreading Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000397426 Centroberyx lineatus Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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Abstract
The utility model provides a kind of underground pipe, ground heat exchanger and heat-exchange system, and wherein, underground pipe comprises: the polyethylene pipe be bonded together and metal tube, and described polyethylene pipe is positioned at the outside of described metal tube.The utility model provides a kind of underground pipe, ground heat exchanger and heat-exchange system to improve heat exchange efficiency.
Description
Technical field
The utility model relates to ground heat exchanger structure and heat transfer technology, particularly relates to a kind of underground pipe, ground heat exchanger and heat-exchange system.
Background technology
Ground heat exchanger utilizes underground to have the comparatively stable characteristic of temperature, by carrying out the device of heat exchange between buried pipe-line system in Around Buildings soil and soil.Be connected with circulation of fluid respectively in pipe-line system in soil and the pipe-line system in building, in winter, soil is as thermal source, and circulation of fluid absorbs the heat in soil, is supplied to building heats by source pump; In summer, soil is as low-temperature receiver, and circulation of fluid absorbs the heat in building, by source pump to soil discharge.Compare with air conditioner refrigerating mode with traditional fire coal, gas-heating mode, ground heat exchanger only needs to consume a small amount of electric energy, and can reach identical heating or refrigeration, operating cost is low, and does not produce any harmful substance, energy-conserving and environment-protective.
At present, ground heat exchanger mainly comprises at least two underground pipes, and underground pipe inserts in soil straight down, is fixedly connected with between two underground pipes by connector.Because polyethylene pipe has, anti-corrosive properties are good, the good advantage of pliability, become the tubing of underground pipe main flow.But the intensity of polyethylene pipe needs to be ensured by wall thickness, in order to reach bearing requirements, polyethylene pipe wall thickness needs to reach respective standard, but the shortcoming brought along with the increase of wall thickness is the increase in thermal conduction resistance, reduce the capacity of heat transmission of underground pipe, reduce heat exchange efficiency.
Utility model content
The utility model provides a kind of underground pipe, ground heat exchanger and heat-exchange system, for improving heat exchange efficiency.
The utility model embodiment provides a kind of underground pipe, comprising: the polyethylene pipe be bonded together and metal tube, and described polyethylene pipe is positioned at the outside of described metal tube.
Underground pipe as above, the inner surface of described metal tube is provided with ribs.
Underground pipe as above, described ribs is screw thread rib.
Underground pipe as above, described ribs is zig-zagging rib.
Underground pipe as above, described ribs is grid-like rib.
The utility model embodiment also provides a kind of ground heat exchanger, comprising: at least two underground pipes as above, connect the U-shaped termination bottom two underground pipes and the connector for fixing at least two underground pipes.
The utility model embodiment also provides a kind of heat-exchange system, comprising: heat exchanger, heat pump and ground heat exchanger as above in building, and described ground heat exchanger is arranged in the soil near building; In described ground heat exchanger, the top of underground pipe is connected with one end of heat pump with drain pipe through feed tube, and the other end of described heat pump is connected with heat exchanger in described building.
The technical scheme that the utility model embodiment provides forms underground pipe by adopting polyethylene pipe and metal tube, and polyethylene pipe is arranged on the outside of metal tube, wearability and the corrosion resistance of underground pipe can be ensured, increase the service life, simultaneously, the metal tube being positioned at inner side can improve the intensity of underground pipe, also reduce the thermal resistance of underground pipe, and, can under the prerequisite ensureing underground pipe intensity, reduce the thickness of polyethylene pipe, reduce further the thermal resistance of underground pipe entirety, improve heat exchange efficiency.
Accompanying drawing explanation
The top plan view of the underground pipe that Fig. 1 provides for the utility model embodiment;
The main pseudosection of the underground pipe that Fig. 2 provides for the utility model embodiment;
The main pseudosection of another underground pipe that Fig. 3 provides for the utility model embodiment;
The main pseudosection of the another kind of underground pipe that Fig. 4 provides for the utility model embodiment;
The top plan view of the another kind of underground pipe that Fig. 5 provides for the utility model embodiment;
The main pseudosection of the another kind of underground pipe that Fig. 6 provides for the utility model embodiment;
The top view of a kind of connector that Fig. 7 provides for the utility model embodiment;
The top plan view of the ground heat exchanger that Fig. 8 provides for the utility model embodiment;
The front view of the ground heat exchanger that Fig. 9 provides for the utility model embodiment;
The top view of the alternative attachment that Figure 10 provides for the utility model embodiment;
The top plan view of another ground heat exchanger that Figure 11 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 12 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 13 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 14 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 15 provides for the utility model embodiment;
The structural representation of each group of underground pipe parallel connection that Figure 16 provides for the utility model embodiment;
The top view of the alternative attachment that Figure 17 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 18 provides for the utility model embodiment;
The top view of the alternative attachment that Figure 19 provides for the utility model embodiment;
The top view of the alternative attachment that Figure 20 provides for the utility model embodiment;
The top plan view of the another kind of underground pipe that Figure 21 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 22 provides for the utility model embodiment;
The top view of the alternative attachment that Figure 23 provides for the utility model embodiment;
The top plan view of the another kind of ground heat exchanger that Figure 24 provides for the utility model embodiment;
The Calculation of Heat Transfer model schematic of the ground heat exchanger that Figure 25 provides for the utility model embodiment.
Detailed description of the invention
The top plan view of the underground pipe that Fig. 1 provides for the utility model embodiment, the main pseudosection of the underground pipe that Fig. 2 provides for the utility model embodiment.As depicted in figs. 1 and 2, the underground pipe that the present embodiment provides comprises: the polyethylene pipe 1 be bonded together and metal tube 2, and wherein, polyethylene pipe 1 is positioned at the outside of metal tube 2.Usually, underground pipe is all cylindrical shape, and therefore, polyethylene pipe 1 is equivalent to outer ring, and metal tube 2 is equivalent to inner ring.
Due to polythene material, to have anti-corrosive properties good, and pliability is strong, and not easily distortion is broken and the advantages such as convenient construction, therefore, polyethylene pipe 1 is arranged on outside, can improves wearability and the corrosion resistance of underground pipe, increase the service life.And the thermal conductivity of metal tube 2 is better, and intensity is higher, is arranged on inner side, can improves the intensity of underground pipe, and reduces the thermal resistance of underground pipe.In addition, because the intensity of metal tube 2 is higher, under the prerequisite ensureing underground pipe intensity, the thickness of polyethylene pipe 1 can be reduced, reduce further the thermal resistance of underground pipe entirety, improve heat exchange efficiency.
Ground heat exchanger comprises at least two underground pipes, is fixedly connected with between underground pipe by connector.Underground pipe is in vertically placing into the soil, the bottom of any two underground pipes is connected by U-shaped termination, the top of two underground pipes connects feed tube and drain pipe respectively, feed tube and drain pipe are connected to one end of heat pump respectively, make the formation loop, one end of two underground pipes, U-shaped termination, feed tube, drain pipe and heat pump, loop inner fills circulation of fluid, and circulation of fluid can be water or other liquid.The other end of heat pump is connected with the pipeline laid in building, and circulation of fluid flows through in the process of underground pipe and between soil carries out exchange heat, then is supplied to building after the further heat exchange of heat pump.
The technical scheme that the present embodiment provides forms underground pipe by adopting polyethylene pipe and metal tube, and polyethylene pipe is arranged on the outside of metal tube, wearability and the corrosion resistance of underground pipe can be improved, increase the service life, simultaneously, the metal tube being positioned at inner side can improve the intensity of underground pipe, also reduces the thermal resistance of underground pipe, and, can under the prerequisite ensureing underground pipe intensity, reduce the thickness of polyethylene pipe, reduce further the thermal resistance of underground pipe entirety, improve heat exchange efficiency.
Polyethylene pipe 1 in above-mentioned underground pipe is relevant to the caliber of underground pipe and bearing requirements with the thickness of metal tube 2, all can be set by production technology personnel.
In addition, in order to improve the intensity of underground pipe further, increase heat exchange area and enhanced heat exchange effect, can also arrange ribs at the inner surface of metal tube 2, ribs can be made of metal, and its shape can be designed as a variety of.
As shown in Figure 2, ribs can be screw thread rib 3, arranges in the shape of a spiral at the inner surface of metal tube 2.Another benefit arranging screw thread rib 3 is can also promote that the circulation of fluid in underground pipe is easier to be in turbulent condition, enhanced heat exchange.
The main pseudosection of another underground pipe that Fig. 3 provides for the utility model embodiment, the main pseudosection of the another kind of underground pipe that Fig. 4 provides for the utility model embodiment.Except screw thread rib 3, technical staff can also arrange other form, as shown in figure 3 or 4, in Fig. 3, it is vertical direction arrangements that the inner surface of metal tube 2 arranges the zig-zagging rib 4 shown in zig-zagging rib 4, Fig. 3, can also horizontal direction arrange, or helical arrangement.In Fig. 4, the inner surface of metal tube 2 arranges grid-like rib 5.
Be screwed in together in order to avoid two underground pipes intersect, usually between two underground pipes, be provided with pipe clamp, allow two underground pipes keep relative spacing in the horizontal direction.Along on the depth direction of underground pipe, a pipe clamp is set every 2m to 4m, for being separated by two underground pipes and making its relative position fix.Install at underground pipe and pipe clamp, in the process of backfill soil, because the transverse direction of pipe clamp intercepts, as easy as rolling off a logly occur air pocket, add the thermal resistance backfilling soil, cause heat transfer efficiency poor.
Therefore, for the problems referred to above, the present embodiment improves above-mentioned underground pipe.The top plan view of the another kind of underground pipe that Fig. 5 provides for the utility model embodiment, the main pseudosection of the another kind of underground pipe that Fig. 6 provides for the utility model embodiment.As shown in Figure 5 and Figure 6, polyethylene pipe 1 and metal tube 2 form underground pipe 10, the outer surface (also namely: the outer surface of polyethylene pipe 1) of underground pipe 10 is provided with spreading arm 11, the length of spreading arm 11 on underground pipe 10 centerline direction is equal with the length of underground pipe 10, then the center line of underground pipe 10 is the axis of underground pipe 10.From Fig. 6, on the axis direction of underground pipe 10, the upper surface of spreading arm 11 flushes with the upper surface of underground pipe 10, and the lower surface of spreading arm 11 flushes with the lower surface of underground pipe 10.Metal tube 2 inwall in Fig. 5 and Fig. 6 is provided with screw thread rib 3, and this screw thread rib 3 can be replaced by above-mentioned zig-zagging rib 4 or grid-like rib 5.
Spreading arm 11 can be one of the forming with polyethylene pipe 1, also can be that independently parts are fixedly connected with polyethylene pipe 1.
In spreading arm 11, remotely the end of pipe laying 10 is provided with the first Access Division 12 all mutual clampings with a connector 6 in the underground pipe 10 of 12, two, the first Access Division, two underground pipes 10 can be fixed by this connector 6.At least two underground pipes 10 form ground heat exchanger.The length of connector 6 can be identical with the length of underground pipe 10.
Corresponding with the structure of the first Access Division 12, connector 6 is provided with at least two the second Access Divisions 61 for being connected with the first Access Division 12.First Access Division 12 and the structure of the second Access Division 61 are mutually mated, and the first Access Division 12 can be in clamping connection with the second Access Division 61.Connector 6 is provided with at least two the second Access Divisions 61, then means that a connector 6 can connect at least two underground pipes 10.The length of the second Access Division 61 on underground pipe 10 centerline direction is identical with the length of connector 6.
The structure of the first Access Division 12 and the second Access Division 61 can be set to various ways, Fig. 5 and Fig. 6 shows a kind of form of the first Access Division 12, that is: the first Access Division 12 is projected as T-shaped structure in the plane perpendicular to buried 10 tube hub lines.Corresponding, the top view of a kind of connector that Fig. 7 provides for the utility model embodiment.As shown in Figure 7, this connector 6 has the second Access Division 61, two 61, two, the second Access Divisions and is T-slot structure, the length direction of T-slot and the centerline parallel of underground pipe 10.First Access Division 12 of T-shaped structure can be inserted in the second Access Division 61 of T-slot structure along the direction of underground pipe 10 center line, limits the first movement of Access Division 12 in the plane perpendicular to underground pipe 10 center line.
In addition, on the direction of underground pipe 10 center line, the length of the first Access Division 12 is also equal with the length of underground pipe 10, that is: the upper surface of the first Access Division 12 flushes with the upper surface of underground pipe 10, and the lower surface of the first Access Division 12 flushes with the lower surface of underground pipe 10.In the process that underground pipe 10 and connector 6 are installed, in the vertical direction, by the second Access Division 61 of two in connector 6 from top to bottom respectively with the first Access Division 12 grafting in two underground pipes 10.The structure of the ground heat exchanger formed after being fixedly connected with by the underground pipe 10 shown in Fig. 5 by the connector 6 shown in Fig. 7 can refer to Fig. 8 and Fig. 9, wherein, the top plan view of the ground heat exchanger that Fig. 8 provides for the utility model embodiment, the front view of the ground heat exchanger that Fig. 9 provides for the utility model embodiment.Ground heat exchanger shown in Fig. 8 also can be called single U-shaped heat exchanger.The bottom of two underground pipes 10 is connected by U-shaped termination 7, and top is connected with drain pipe 9 with feed tube 8 respectively.
Technique scheme is by arranging spreading arm at the outer surface of each underground pipe, and in spreading arm remotely the end of pipe laying 10 first Access Division is set, and adopt the connector with second Access Division that can be in clamping connection with the first Access Division to be fixedly connected with by least two underground pipes, invariably pipe laying is wound around mutually during pipe under constructing.And, the length of spreading arm on underground pipe centerline direction is equal with the length of underground pipe, realize on vertical direction without hindrance every, therefore, in the process of carrying out soil backfill, the soil of the surrounding of underground pipe can be compacted, improve the compaction rate of backfill soil, avoid the generation of air pocket, reduce the thermal resistance of backfill soil, improve heat transfer efficiency.Further, need adopt the mode of multiple pipe clamp with prior art, the technical scheme that the present embodiment provides can reduce difficulty of construction.
The top view of the alternative attachment that Figure 10 provides for the utility model embodiment.Except can adopting the connector 6 shown in Fig. 7, structure as shown in Figure 10 can also be adopted, connector 6 is provided with four the second Access Divisions 61, then mean that a connector 6 can connect four underground pipes, as shown in figure 11, the top plan view of another ground heat exchanger that provides for the utility model embodiment of Figure 11.In Figure 11, comprise four underground pipes 10, the first Access Division 12 of each underground pipe 10 is connected with the connector 6 with four the second Access Divisions 61 shown in Figure 10 respectively, and four underground pipes 10 are fixed together, and forms decussate texture.In addition, Tu11Zhong, the bottom of any two underground pipes 10 is connected by U-shaped termination 7, form dual U-shaped heat exchanger, wherein, two underground pipes 10 connected by U-shaped termination 7 are as one group, be connected with drain pipe 9 with feed tube 8 separately between two groups, be equivalent between two groups in parallel.
For the structure of the underground pipe 10 mentioned in such scheme, two spreading arms 11 can be set at the outer surface of underground pipe 10, and two spreading arms 11 are symmetrical along the centerline axis of underground pipe 10, structure as shown in Figure 5 and Figure 6.
The connector that the present embodiment provides and underground pipe have good expansibility, such as, adopt kind of the connector of two shown in Fig. 7 and Figure 10 6 to combine, can combine again the ground heat exchanger obtaining other form.
The top plan view of the another kind of ground heat exchanger that Figure 12 provides for the utility model embodiment.As shown in figure 12, ground heat exchanger comprises six roots of sensation underground pipe 10, wherein, four underground pipes 10 are linked together by the connector 6 with four the second Access Divisions 61 shown in Figure 10, wherein, two relative underground pipes 10 adopt again the connector 6 with two the second Access Divisions 61 shown in Fig. 7 to link together with other two underground pipes 10 respectively.In Figure 12, the bottom of any two underground pipes 10 is connected by U-shaped termination 7, form three U-shaped heat exchangers, wherein, two underground pipes 10 connected by U-shaped termination 7 are as one group of loop, have three groups of loops in Figure 12, be connected with drain pipe 9 with feed tube 8 separately between three groups of loops, be equivalent between three groups of loops in parallel.
The top plan view of the another kind of ground heat exchanger that Figure 13 provides for the utility model embodiment.As shown in figure 13, ground heat exchanger comprises eight underground pipes 10, on the basis of Figure 12, other two in middle four underground pipes 10 also link together with other two underground pipes 10 respectively by the connector 6 with two the second Access Divisions 61 shown in Fig. 7.In Figure 13, the bottom of any two underground pipes 10 is connected by U-shaped termination 7, form four U-shaped heat exchangers, wherein, two underground pipes 10 connected by U-shaped termination 7 are as one group of loop, have four groups of loops in Figure 13, be connected with drain pipe 9 with feed tube 8 separately between four groups of loops, be equivalent between four groups of loops in parallel.
The top plan view of the another kind of ground heat exchanger that Figure 14 provides for the utility model embodiment.As shown in figure 14, ground heat exchanger comprises four underground pipes 10, connects into three-back-shaped in turn by the connector 6 with four the second Access Divisions 61 shown in Figure 10.In Figure 14, the bottom of any two underground pipes 10 is connected by U-shaped termination 7, wherein, two underground pipes 10 connected by U-shaped termination 7 are as one group of loop, have two groups of loops in Figure 14, be connected with drain pipe 9 with feed tube 8 separately between two groups of loops, be equivalent between two groups of loops in parallel.
The top plan view of the another kind of ground heat exchanger that Figure 15 provides for the utility model embodiment.As shown in figure 15, ground heat exchanger comprises 12 underground pipes 10, adopts the connector 6 with four the second Access Divisions 61 shown in Figure 10 to connect, forms the structure shown in Figure 15.In Figure 15, the bottom of any two underground pipes 10 is connected by U-shaped termination 7, form groined type heat exchanger, wherein, two underground pipes 10 connected by U-shaped termination 7 are as one group of loop, have six groups of loops in Figure 15, be connected with drain pipe 9 with feed tube 8 separately between six groups of loops, be equivalent between six groups of loops in parallel.
Parallel relationship between each group of loop can refer to Figure 16, the structural representation of each group of underground pipe parallel connection that Figure 16 provides for the utility model embodiment.Often organize in loop, the upper end of two underground pipes 10 is connected with drain pipe 9 with feed tube 8 respectively, and feed tube 8 is connected with the feed pipe 21 of circulation of fluid further, and drain pipe 9 is connected with the liquid back pipe 22 of circulation of fluid further.Circulation of fluid feed pipe 21 and circulation of fluid liquid back pipe 22 are connected to one end of heat pump respectively, form closed circuit with one end of heat pump.Circulation of fluid flows through each underground pipe 10 from feed pipe 21, after carrying out heat exchange, is collected to liquid back pipe 22 with soil, completes source, ground calorimetric exchange process.In Figure 16, the structure shown in dotted line is ground buried via hole 23, in the process that underground pipe is installed, first will get out buried hole 23 in underground, then underground pipe 10 is put into ground buried via hole 23, then backfill soil or other backfilling material in ground buried via hole 23.
Except above-mentioned several connected mode, technical staff can also design other connected mode, adopt above-mentioned underground pipe 10 and connector 6 can form multiple loop, the ground heat exchanger that the present embodiment is provided can adapt to the requirement of various job site more flexibly.
The top view of the alternative attachment that Figure 17 provides for the utility model embodiment.On the basis of technique scheme, above-mentioned connector 6 is except can adopting the structure shown in Fig. 7 or Figure 10, technical staff also can design alternate manner, such as adopt the mode of Figure 17, the centre of connector 6 is hollow-core construction, and the surrounding of hollow-core construction arranges four symmetrical the second Access Divisions 61.Adopt the connector 6 shown in Figure 17, four underground pipes 10 can be fixed, as shown in figure 18, the top plan view of the another kind of ground heat exchanger that Figure 18 provides for the utility model embodiment.
The top view of the alternative attachment that Figure 19 provides for the utility model embodiment.Connector 6 can also be set to structure as shown in figure 19, and centre does not arrange hollow-core construction, but solid construction.The surrounding of solid construction arranges four symmetrical the second Access Divisions 61.Adopt the connector 6 shown in Figure 19, four underground pipes 10 can be fixed.
The top view of the alternative attachment that Figure 20 provides for the utility model embodiment.As shown in figure 20, connector 6 can also be set to structure as shown in figure 20, and connector 6 is provided with two the second Access Divisions 61, and two the second Access Divisions 61 are dovetail groove, the length direction of dovetail groove and the centerline parallel of underground pipe 10.Corresponding, the first Access Division 12 in underground pipe 10 is projected as swallow-tail form, the length direction of the first Access Division 12 and the centerline parallel of underground pipe 10 in the plane perpendicular to underground pipe 10 center line.First Access Division 12 of swallowtail-shaped structure can be inserted in dovetail groove along the direction of underground pipe 10 center line.As shown in figure 21, the top plan view of another kind of underground pipe that provides for the utility model embodiment of Figure 21.Adopt the connector 6 shown in Figure 20 the underground pipe 10 shown in two Figure 21 can be fixedly connected with, the structure after connection can refer to Figure 22, the top plan view of the another kind of ground heat exchanger that Figure 22 provides for the utility model embodiment.
The top view of the alternative attachment that Figure 23 provides for the utility model embodiment.As shown in figure 23, four the second Access Divisions 61 can also be set in connector 6, and four the second Access Divisions 61 are dovetail groove.Then this connector 6 can be fixedly connected with four underground pipes 10 simultaneously, as shown in figure 24, and the top plan view of the another kind of ground heat exchanger that Figure 24 provides for the utility model embodiment.
In adopting above-mentioned ground heat exchanger to place into the soil, exchange heat thermal resistance has following several: soil horizon thermal resistance Rs, backfilling material thermal resistance Rg, and the thermal-convection resistance Rf of tube wall inside underground pipe tube wall heat conduction thermal resistance Rpm and underground pipe, the unit of thermal resistance is m DEG C/W.
The Calculation of Heat Transfer model schematic of the ground heat exchanger that Figure 25 provides for the utility model embodiment.For above-mentioned ground heat exchanger, Calculation of Heat Transfer model can be set up, as shown in figure 25, Ts is the initial temperature of ground heat exchanger surrounding soil, Tb is the mean temperature of buried hole wall, Tg is the mean temperature of backfilling material, and Tf is the mean temperature of the turnover liquid of ground heat exchanger fluid circulating.
Then in accordance with the computational methods in " earth-source hot-pump system engineering legislation " GB50366-2005 (2009 editions), because the underground pipe in the present embodiment adopts the composite pipe of outer layer polyethylene inner layer metal, underground pipe tube wall heat conduction thermal resistance Rpm can be reduced.In addition, because metal pipe internal surface adds metal screw thread rib, can promote that circulation of fluid is easier to be in turbulent condition, increase heat exchange area, therefore can also reduce the thermal-convection resistance Rf of tube wall inside underground pipe.Adopt connector grafting between underground pipe, effectively increase backfill density, avoid air pocket to produce, reduce backfilling material thermal resistance Rg.And owing to adopting connected structure, efficiently avoid hot short circuit, make the heat transfer effect of underground pipe better, improve heat exchange efficiency, with in prior art with compared with the conventional main flow underground pipe of caliber, the exchange capability of heat of the ground heat exchanger that the present embodiment provides at least improves 5%.
In addition, the present embodiment also provides a kind of heat-exchange system, comprise: be laid in heat exchanger in the building in building, heat pump and as above any one ground heat exchanger, wherein, ground heat exchanger is arranged in the soil near building, in ground heat exchanger, the top of underground pipe is connected with one end of heat pump with drain pipe through feed tube, and the other end of heat pump is connected with heat exchanger in building.
This heat-exchange system adopts above-mentioned ground heat exchanger, underground pipe is formed by adopting polyethylene pipe and metal tube, and polyethylene pipe is arranged on the outside of metal tube, wearability and the corrosion resistance of underground pipe can be ensured, increase the service life, simultaneously, the metal tube being positioned at inner side can improve the intensity of underground pipe, also reduce the thermal resistance of underground pipe, further, under the prerequisite ensureing underground pipe intensity, the thickness of polyethylene pipe can be reduced, reduce further the thermal resistance of underground pipe entirety, improve heat exchange efficiency.
In addition, technique scheme also arranges spreading arm at the outer surface of each underground pipe, and the first Access Division is set in the end of spreading arm, and adopt the connector with second Access Division that can be in clamping connection with the first Access Division to be fixedly connected with by least two underground pipes, invariably pipe laying is wound around mutually during pipe under constructing.And, the length of spreading arm on underground pipe centerline direction is equal with the length of underground pipe, realize on vertical direction without hindrance every, therefore, in the process of carrying out soil backfill, the soil of the surrounding of underground pipe can be compacted, improve the compaction rate of backfill soil, avoid the generation of air pocket, reduce the thermal resistance of backfill soil, further increase heat transfer efficiency.Further, need adopt the mode of multiple pipe clamp with prior art, the technical scheme that the present embodiment provides can reduce difficulty of construction.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (7)
1. a underground pipe, is characterized in that, comprising: the polyethylene pipe be bonded together and metal tube, and described polyethylene pipe is positioned at the outside of described metal tube.
2. underground pipe according to claim 1, is characterized in that, the inner surface of described metal tube is provided with ribs.
3. underground pipe according to claim 2, is characterized in that, described ribs is screw thread rib.
4. underground pipe according to claim 2, is characterized in that, described ribs is zig-zagging rib.
5. underground pipe according to claim 2, is characterized in that, described ribs is grid-like rib.
6. a ground heat exchanger, is characterized in that, comprising: at least two underground pipes as described in any one of claim 1-5, the U-shaped termination bottom connection two underground pipes and the connectors for fixing at least two underground pipes.
7. a heat-exchange system, is characterized in that, comprising: heat exchanger, heat pump and ground heat exchanger as claimed in claim 6 in building, and described ground heat exchanger is arranged in the soil near building; In described ground heat exchanger, the top of underground pipe is connected with one end of heat pump with drain pipe through feed tube, and the other end of described heat pump is connected with heat exchanger in described building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520300568.5U CN204612251U (en) | 2015-05-11 | 2015-05-11 | Underground pipe, ground heat exchanger and heat-exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520300568.5U CN204612251U (en) | 2015-05-11 | 2015-05-11 | Underground pipe, ground heat exchanger and heat-exchange system |
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| Publication Number | Publication Date |
|---|---|
| CN204612251U true CN204612251U (en) | 2015-09-02 |
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| CN201520300568.5U Expired - Fee Related CN204612251U (en) | 2015-05-11 | 2015-05-11 | Underground pipe, ground heat exchanger and heat-exchange system |
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| CN (1) | CN204612251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819601A (en) * | 2015-05-11 | 2015-08-05 | 中国建筑科学研究院 | Ground buried pipe, ground buried pipe heat exchanger and heat exchange system |
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2015
- 2015-05-11 CN CN201520300568.5U patent/CN204612251U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819601A (en) * | 2015-05-11 | 2015-08-05 | 中国建筑科学研究院 | Ground buried pipe, ground buried pipe heat exchanger and heat exchange system |
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