CN105937861B - Ultra-long flexible heat pipe and geothermal snow melting and deicing method thereof - Google Patents
Ultra-long flexible heat pipe and geothermal snow melting and deicing method thereof Download PDFInfo
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- CN105937861B CN105937861B CN201610389338.XA CN201610389338A CN105937861B CN 105937861 B CN105937861 B CN 105937861B CN 201610389338 A CN201610389338 A CN 201610389338A CN 105937861 B CN105937861 B CN 105937861B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008018 melting Effects 0.000 title abstract description 12
- 238000002844 melting Methods 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000009833 condensation Methods 0.000 claims abstract description 27
- 230000005494 condensation Effects 0.000 claims abstract description 25
- 238000012546 transfer Methods 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 12
- 239000005413 snowmelt Substances 0.000 claims description 28
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 24
- 238000005553 drilling Methods 0.000 claims description 21
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 229910021529 ammonia Inorganic materials 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000001282 iso-butane Substances 0.000 claims description 7
- 235000013847 iso-butane Nutrition 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000002322 conducting polymer Substances 0.000 claims description 5
- 229920001940 conductive polymer Polymers 0.000 claims description 5
- IJDNQMDRQITEOD-UHFFFAOYSA-N sec-butylidene Natural products CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 5
- 230000002269 spontaneous effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- SOUGLODYPBMACB-UHFFFAOYSA-N butane;hydrate Chemical compound O.CCCC SOUGLODYPBMACB-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008020 evaporation Effects 0.000 abstract description 6
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 239000002689 soil Substances 0.000 description 9
- 239000000440 bentonite Substances 0.000 description 7
- 229910000278 bentonite Inorganic materials 0.000 description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 7
- 238000009835 boiling Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 238000007500 overflow downdraw method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- -1 CaCl after snow2 Chemical compound 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0241—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the tubes being flexible
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
- E01C11/26—Permanently installed heating or blowing devices ; Mounting thereof
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to an ultra-long flexible heat pipe and a geothermal snow melting and deicing method thereof, wherein the ultra-long flexible heat pipe is made of an ultra-long flexible pipe (2), and the structure of the ultra-long flexible pipe is divided into a condensation section (6), a heat insulation section (7) and an evaporation section (a heat taking end) (8) from top to bottom; the evaporation section (8) is lined with a liquid absorption core (3), and liquid storage devices (4) are welded at intervals; the heat pipe is filled with a heat transfer medium (5). Vertically burying an evaporation section (8) and a heat insulation section (7) of the ultra-long flexible heat pipe in a drill hole (13) below a roadbed (12), filling a backfill material (14) in the drill hole (13), and arranging a bent condensation section (6) in the roadbed (12); under the action of temperature difference, the heat transfer working medium (5) in the heat pipe spontaneously carries out the circulation of evaporation, rising, condensation and backflow, draws geothermal heat to heat the roadbed, and keeps the temperature of the road surface above zero, thereby melting snow and removing ice. The geothermal snow melting and deicing system constructed based on the method does not need to consume energy and power in the operation period, does not need maintenance, and can autonomously operate in all weather.
Description
Technical field
The present invention relates to overlength flexible heat pipe and its underground heat snow melt de-icing method, belong to geothermal utilization and Cryo Heat Tube application
Technical field.
Technical background
Winter, particularly cold district, temperature are in subzero for a long time, and snowfall Hou Dao Louis forms accumulated snow or knot
Ice, road surface slippery situation, seriously hinder the accumulated snow on the road surface such as normal traffic circulation, particularly ramp, intersection, airport, bridge
Freeze, the trip to people brings great potential safety hazard.
Traditional snow melt de-icing method has two kinds of removing method and thawing method.Removing method is to product using manually or mechanically equipment
Snow and icing are purged, and artificial efficiency of cleaning snow is extremely low, and the operating cost of large-scale snow removing equipment is high, in operation inevitably
Interruption of communication can be caused, meanwhile, machinery it is more difficult thoroughly remove it is icy on road.Thawing method includes chemistry and melted and two kinds of hot fusion method.
Wherein, chemistry thawing is road surface spraying Snow Agent (NaCl, CaCl after snow2、MgCl2、KCH3COO) etc., mixed using salt solution
Reducing the fusing point of ice and snow makes snow melting, and this method cost is low, effect is preferable, but serious pollution can be caused to soil, accelerates
The corrosion of inside concrete steel construction.In addition, above-mentioned several method is both needed to carry out after snowfall, it is clear that is not suitable for military airfield
Runway, hospital's emergency entrance etc. need the special road of round-the-clock uninterrupted operation.
Hot fusion method deicing or snow melting by the way of heating, round-the-clock can meet the snow melt requirement of road, mainly there is electricity at present
Cable/carbon fiber heating, conducting concrete heating and thermal fluid circulation heating etc..Beijing Zhongqi Zhuochuang Technology Development Co., Ltd. exists
It is proposed to use carbon fiber or electric cable heating airport pavement deicing or snow melting, such method in Publication No. CN104863036A patent
Heat energy directly is converted electrical energy into, energy consumption is larger, less economical.The Zhang Ronghai of Harbin Lida Shengyuan Technology Development Co., Ltd.
It is proposed, using ground heat exchanger and circulation pumping underground heat, to pass through hot fluid circulation in Publication No. CN103669163A patent
Heating road surface reaches the purpose of deicing or snow melting；Chongqing Jiaotong University's Zhao Ning rain etc. is in Publication No. CN104594156A patent
It is proposed using underground heat as thermal source, using heat pump fluid, then by the method for pipeline circulating-heating road come deicing or snow melting.It is above-mentioned
For two methods come snow melt by the way of thermal cycle heats fluid, energy consumption is relatively low, but the equipment such as circulating pump, heat pump makes
With adding the complexity of system, operational reliability reduces.
Underground heat snow melt deicing system based on heat pipe, the problem of in the absence of environmental pollution, and moved without any external energy
Power can voluntarily be run, and be the technology of generally acknowledged most with prospects and sustainability.Publication No. CN104404854A,
In the patents such as CN201933383U, CN201047050Y, several sides that underground heat deicing or snow melting is taken using heat pipe are inventors herein proposed
Method.However, soil thermostat layer typically below earth's surface 20m, take heat pipe used in underground heat need to generally possess super-long structural (40m with
On), the on-way resistance that steam flows upward flows back downwards with condensate liquid in pipe increases therewith, is unfavorable for working medium evaporation-condensation and follows
Ring process.Secondly, the filling amount of such heat-pipe working medium is big, and evaporator section liquid pool liquid level is higher, the hydrostatic pressure meeting of liquid pool bottom
The local saturation temperature (i.e. phase transition temperature) of working medium is greatly enhanced, the startability of heat pipe is reduced, suppresses the efficient of evaporator section
Evaporation heat transfer, and then influence the overall heat transfer property of heat pipe.
Below by taking overall length 90m ammonia heat pipe as an example, calculate analysis hydrostatic pressure and overlength heat-pipe working medium liquid pool bottom is satisfied
With the influence of temperature.If the heat pipe is arranged in the soil region that thermostat layer is 15 DEG C or so, evaporator section liquid pool when working medium ammonia is stood
High 30m, it is assumed that operating temperature is close to 15 DEG C during its normal operation, i.e., saturation temperature is 15 DEG C at liquid pool liquid level.Known temperature 15
Under the conditions of DEG C, liquefied ammonia density pLFor 616.7kg/m3, saturated vapor density ρVFor 6.44kg/m3, saturated vapor pressure PsFor 7.26 ×
105Pa, surface tension σlFor 0.0225N/m, latent heat of vaporization hfgFor 1.208 × 106J/kg, then liquid pool bottom liquid static pressure be：
PL=ρLGh=616.7 × 9.81 × 30=1.815 × 105Pa
Gross pressure is：
Pt=PL+Ps=(7) .26+1.815 × 105=9.075 × 105Pa
Saturation temperature corresponding to ammonia is 21.9 DEG C under the pressure.
The degree of superheat needed for formation boiling is about under the conditions of ammonia working medium is somebody's turn to do：
Therefore heating-up temperature needed for the generation boiling of the heat pipe evaporator section bottom is up to：
Tb=Ts+ △ T=21.9+0.1=22 DEG C
Obviously, the heat pipe evaporator section lower part to form stable boiling by being difficult in the soil thermostat layer that temperature is 15 DEG C
Operating mode.
In addition, the problems such as high cost, transport and installation inconvenience, soil can also be brought by taking the super-long structural of underground heat heat pipe
Corrosion to Can also greatly shorten its service life.And the measure for solving above-mentioned problem is not referred in existing patent
And embodiment, therefore, it is currently based on the more difficult popularization and application for carrying out large area of underground heat snow-smelting method of heat pipe.
The content of the invention
The purpose of the present invention is to solve cost, efficiency, pollution, installation, transport etc. existing for existing snow melt clearing ice technology
Problem and propose a kind of overlength flexible heat pipe, it is a further object of the present invention to provide a kind of based on above-mentioned overlength flexible heat pipe
Underground heat snow melt de-icing method, underground heat is drawn using overlength flexible heat pipe, spontaneous active carries out road, bridge, aircraft round-the-clockly
The deicing or snow melting in the regions such as runway.Secondly, the present invention can also be expanded applied to cold district planting vegetable in greenhouse, heating of house
Occasion is directly utilized Deng underground heat, or is attached in earth-source hot-pump system.
The technical scheme is that：A kind of overlength flexible heat pipe 1, it is characterised in that overall shell is by overlength flexible pipe
2 are made, and structure is divided into condensation segment (release end of heat) 6, adiabatic section 7 and the three parts of evaporator section (taking hot junction) 8 from top to down；Wherein evaporate
8 liner liquid-sucking cores 3 of section, and be welded a reservoir 4 every a segment distance, and condensation segment 6 and adiabatic section 7 are without liquid-sucking core 3
With reservoir 4；Heat-transfer working medium 5 is filled in heat pipe.
It is preferred that the external diameter of overlength flexible heat pipe 1 is 10~40mm, overall length is 40~150m；The length of adiabatic section 7 be 10~
20m；Condensation segment 6 is 1/2~1/10 with the length ratio of evaporator section 8；The thickness of liner liquid-sucking core 3 is 1~2mm；It is preferred that evaporator section 8 is every
It is welded a reservoir 4 every 1~2m.
It is preferred that overlength flexible pipe 2 is flexible compound material, 1~3m of diameter circle can be coiled into；It is preferred that overlength flexible pipe
Material 2 is bonded through PUR 10 with inner layer metal film 11 by outer layer heat-conducting polymer material 9 and formed；Wherein described heat conduction high score
The thermal conductivity of sub- material 9 is 1.0~1.5W/ (mK), typically using plastics or rubber as matrix, filling or crosslinking heat filling system
Into；Described inner layer metal film 11 is aluminium, copper or steel, and its ductility is preferable, preferably the thickness 0.1 of inner layer metal film 11~
0.3mm。
It is preferred that it is the immiscible working medium pair of binary that heat-transfer working medium 5 is filled in heat pipe；It is preferred that working medium to for ammonia and iso-butane, ammonia with
Normal butane, methanol and normal butane or water and iso-butane；Both mass ratioes are 1/4~4/1.Utilize immiscible biliquid symbiotic system
The permanent characteristic for being less than any pure component boiling point of boiling point, strengthens the startability of heat pipe, promotes the evaporation-condensation phase transformation of working medium to follow
Ring.
It is preferred that the volume that heat-transfer working medium 5 is filled in heat pipe is the 40%~80% of the inner space of evaporator section 8.
It is preferred that the material of above-mentioned reservoir 4 is identical with overlength flexible pipe 2, top is taper reducer union, and bottom is
The larger shell of internal diameter, its internal suit and the isometrical adapter of overlength flexible pipe 2, form bag-shaped liquid storage tank, the reservoir 4 is same
Sample liner liquid-sucking core 3.It is preferred that a length of 20~40mm of upper taper reducer union, bottom is the larger shell of internal diameter, and its external diameter is 30
~50mm, a length of 40~60mm, its internal suit and the isometrical adapter of overlength flexible pipe 2, form bag-shaped liquid storage tank；It is isometrical to connect
Guan overall lengths are 50~80mm, a height of 30~50mm of liquid storage tank, and structure is shown in Fig. 3.
The overlength flexible heat pipe can use straight line, loop or the multiple structural forms such as dendritic.
Present invention also offers the underground heat snow melt de-icing method using above-mentioned overlength flexible heat pipe, it is concretely comprised the following steps：
Overlength flexible heat pipe evaporator section 8 and adiabatic section 7 are embedded in vertically in the drilling 13 of the lower section of roadbed 12, backfill material is filled up in drilling 13
Material 14, condensation segment 6 are arranged in roadbed 12 after bending with 1%~5% slope；In winter, under action of thermal difference, inside heat pipe passes
Hot working fluid 5 is spontaneous to be evaporated-rising-and the circulation for condensing-flowing back, draws geothermal heating roadbed, pavement temperature is maintained at zero
More than degree, so as to snow melt deicing.
It is preferred that in above-mentioned underground heat snow melt de-icing method, backfilling material 14 divides two layers in drilling 13, and bottom backfilling material has
Thermal conduction characteristic, thermal conductivity are the proportioning mixing of magma, bentonite, fine sand, cement or above-mentioned material at 1.8~2.3W/ (mK)
Thing, backfilled using pressure grouting, it is permeated to surrounding soil, the heat affected area of increase drilling 13, raising takes hot property；And
Drill 13 regions near the ground, i.e. the region of adiabatic section 7, is backfilled using the material with insulating characteristicses, such as magma or bentonite and nothing
The proportioning mixture of machine insulation filler (expanded perlite, calcium silicates, foam cement, rock wool or mineral wool), thermal conductivity 0.1~
0.3W/ (mK), to reduce the thermal loss for taking thermal process, improve system whole efficiency.In addition, backfilling material 14 must ram
It is real, avoid surface water from passing through the 13 downward osmosis pollution underground water that drill.
The overlength flexible heat pipe 1, using the uniform working medium of capillary draft of the liner liquid-sucking core 3 of evaporator section 8, coordinate installation
Reservoir 4 can prevent working medium 5 from forming higher liquid pool, the harmful effect for avoiding hydrostatic pressure from bringing in heat pipe bottom；Secondly,
Liquid-sucking core is not installed additional in condensation segment 6 and adiabatic section 7, can reduce the backflow resistance of condensation thermal resistance and condensate liquid.
The overlength flexible heat pipe 1, there is higher amount of deflection, 1~3m of diameter circle can be coiled into, be readily transported and install
Arrangement；The good mechanical property of outer layer heat-conducting polymer material 9 ensure that the resistance to pressure of heat pipe package, and inner layer metal film 11 can
The air-tightness and compatibility of heat pipe are improved, prevents leakage and the corrosion tubing of internal working medium 5；In addition, outer layer high polymer material 9 is solid
Some corrosion resistance characteristics, heat pipe is coped with the soil corrosion under complex environment, the cycle of operation of heat pipe is significantly greatly increased.
The operation principle of the present invention is as follows：
Winter road snow mantle freezes, and pavement temperature is relatively low, but depth of soils (generally higher than 10m) thermostat layer temperature is higher
(close to local average temperature of the whole year), under temperature difference promotion, the internal working medium 5 of overlength flexible heat pipe 1 is spontaneous will stably to pass through phase transformation
Flow circuit is by ground Heat transmission to road surface.Heat transmission path is as follows：Underground heat is passed to by conduction of heat from soil first
Backfilling material 14 in drilling 13, then the work to its internal working medium 5, being distributed in liquid-sucking core 3 is conducted by the tubing of heat pipe evaporator section 8
Sensible heat is converted into latent heat by matter 8 by surface evaporation or nucleate boiling, and then working substance steam flows up under differential pressure action, will
Latent heat is carried to the condensation segment 6 in roadbed 12 to be discharged by condensation process, and conduction of the heat through tubing and roadbed 12 of release is made
With road surface is reached, last condensate liquid is back to evaporator section 8 and absorbed heat again under gravity, completes phase transformation flow circuit.Rely on
Above-mentioned circulating heat pipe can spontaneously draw geothermal heating roadbed, winter pavement temperature is maintained at more than zero degree, so as to which snow melt removes
Ice.
For suitably being changed in concrete structure, material, arrangement form, application scenario etc., but general principle and this hair
It is bright consistent, also fall within the scope and spirit of the invention.For example, heat pipe arrangement form slight changes (Fig. 8-10), heat pipe knot
Structure is changed to loop (Figure 10), dendritic (Figure 11) etc., and application scenario is changed to planting vegetable in greenhouse, heating of house, geothermal heat pump system
Deng.
Beneficial effect：
The shell of overlength flexible heat pipe 1 can be directly high by extrusion forming, technical maturity, good corrosion resistance, reliability；Overlength
The evaporator section reservoir 4 of flexible heat pipe 1 is used cooperatively with liquid-sucking core 3, avoids the harmful effect that liquid pool hydrostatic pressure is brought；
Overlength flexible heat pipe 1 fills the immiscible working medium pair of binary, can reduce the saturation temperature of working medium, strengthens its startability, promotes phase
Become flow circuit；Overlength flexible heat pipe 1 has amount of deflection, can coil lopping, convenient transportation, while mounting arrangements are flexible；Based on this
Energy source and power need not be consumed by inventing in the underground heat snow melt deicing system cycle of operation of structure, Maintenance free, can be round-the-clock from shipping
OK.
Brief description of the drawings
Fig. 1 is the structural representation of overlength flexible heat pipe of the present invention.
Fig. 2 is overlength flexible heat pipe condensation segment described in Fig. 1 and the vertical section schematic diagram of adiabatic section.
Fig. 2 ' is the vertical section schematic diagram of overlength flexible heat pipe evaporator section described in Fig. 1.
Fig. 3 is the vertical section schematic diagram of reservoir.
Fig. 4 is the vertical of the underground heat snow melt de-icing method of the radial arrangement of overlength flexible heat pipe condensation segment described in embodiment 2
Body layout drawing.
Fig. 5 is the top view of underground heat snow melt de-icing method described in Fig. 4.
Fig. 6 is the drilling vertical section schematic diagram of underground heat snow melt de-icing method described in Fig. 4.
Fig. 7 is the drilling horizontal schematic cross-section of underground heat snow melt de-icing method described in Fig. 4.
Fig. 8 is the three-dimensional cloth for the underground heat snow melt de-icing method that overlength flexible heat pipe condensation segment described in embodiment 3 is arranged in parallel
Put figure.
Fig. 9 is the top view of underground heat snow melt de-icing method described in Fig. 8.
Figure 10 is the underground heat snow melt de-icing method isometric plan of the loop overlength flexible heat pipe of embodiment 4.
Figure 11 is the structural representation of the dendritic overlength flexible heat pipe of embodiment 5.
Wherein：1- overlength flexible heat pipes, 2- overlength flexible pipes, 3- liquid-sucking cores, 4- reservoirs, 5- working medium, 6- condensation segments,
7- adiabatic sections, 8- evaporator sections, 9- outer layer heat-conducting polymer materials, 10- PURs, 11- inner layer metal films, 12- roadbeds, 13-
Drilling, 14- backfilling materials, 15- clips.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings, but and be not so limited this invention be applicable
Scope.
Embodiment 1
A kind of overlength flexible heat pipe structure of the present invention applied to airfield runway as shown in figure 1, carry out melting for winter
Snow and ice.1 overall shell of overlength flexible heat pipe is made up of overlength flexible pipe 2, and structure is divided into condensation segment (heat release from top to down
End) 6, adiabatic section 7 and the three parts of evaporator section (taking hot junction) 8；The liner liquid-sucking core 3 of evaporator section 8, meanwhile, evaporator section every one section away from
From the reservoir 4 that is welded, and condensation segment 6 and adiabatic section 7 do not install liquid-sucking core 3 and reservoir 4；Heat transfer work is filled in heat pipe
Matter 5.The evaporator section 8 of the overlength flexible heat pipe 1 and adiabatic section 7 are embedded in the drilling 13 of the lower section of roadbed 12 vertically, in drilling 13
Backfilling material 14 is filled up, condensation segment 6 is arranged in roadbed 12 after bending with certain slope.
In winter, under action of thermal difference, inside heat pipe heat-transfer working medium 5 is spontaneous to be evaporated-rising-circulation for condensing-flowing back,
Geothermal heating roadbed is drawn, pavement temperature is maintained at more than zero degree, so as to snow melt deicing.
Embodiment 2
A kind of overlength flexible heat pipe and its underground heat snow melt de-icing method as described in Example 1, using shown in Fig. 4~Fig. 5
Condensation segment 6 be radial arrangement form, the overall length 55m of overlength flexible heat pipe 1,8 long 40m of evaporator section, adiabatic section 7 is 10m, cold
Solidifying section 6 is 5m, external diameter 25mm, internal diameter 21mm.Using PPR as matrix, graphene is made overlength flexible pipe 2 for heat filling, heat
Conductance 1.5W/ (mK), thickness 2mm, liner 0.1mm aluminium films；The liner absorbing carbon fiber wick-containing of evaporator section 8, thickness 1mm；Liquid storage
Device 4 installs one additional every 2m, and material is identical with overlength flexible pipe 2, and top is taper reducer union, long 20mm, bottom Φ
40 × 2mm shells, long 60mm, the isometrical adapter of its internal suit overlength flexible pipe 2, form bag-shaped liquid storage tank, isometrical adapter
Overall length 50mm, the high 40mm of liquid storage tank, structure are shown in Fig. 3, the liner liquid-sucking core 3 of reservoir 4；Internal working medium is using ammonia and iso-butane working medium
To (mass ratio 4:1), working medium volume accounts for the 40% of the inner space of evaporator section 8；Drill 13 deep 50m, diameter 150mm, spacing 4.5m,
Drill proportioning mixture backfill of 13 bottoms using cement, bentonite and fine sand, mass ratio 1:2:2, thermal conductivity 2.3W/ (m
K), 13 near surface regions are drilled using the filling of the mixture of bentonite and foam cement, mass ratio 1:1, thermal conductivity 0.3W/
(mK), and 13 mouthfuls of drilling is shut with concrete；Three heat pipes of arrangement, are fixed by clip 15, see figure in each drilling 13
5；Heat pipe condenser section 6 is embedded in roadbed, away from ground surface 5cm, slope 2%, sees Fig. 6.
It it is -8 DEG C in air themperature, under the conditions of moderate gale, single heat pipe transimission power about 0.5kW, surface temperature is maintained at
More than 0.5 DEG C.
Embodiment 3
A kind of overlength flexible heat pipe and its underground heat snow melt de-icing method as described in Example 1, using shown in Fig. 8~Fig. 9
Be arranged in juxtaposition form, the overall length 70m of overlength flexible heat pipe 1,8 long 40m of evaporator section, adiabatic section 7 is 10m, and condensation segment 6 is 20m, outside
Footpath 32mm, internal diameter 28mm.Using ABS as matrix, aluminum oxide is made overlength flexible pipe 2 for heat filling, thermal conductivity 1.0W/ (m
K), thickness 2mm, liner 0.2mm aluminium films；The inner liner stainless steel woven wire liquid-sucking core of evaporator section 8, thickness 2mm；Reservoir 4 is every
Install one additional every 1m, material is identical with overlength flexible pipe 2, and top is taper reducer union, long 40mm, bottom for Φ 50 ×
2mm shells, long 60mm, the isometrical adapter of its internal suit overlength flexible pipe 2, form bag-shaped liquid storage tank, isometrical adapter overall length
80mm, the high 50mm of liquid storage tank, structure are shown in Fig. 3, the liner liquid-sucking core 3 of reservoir 4；Internal working medium is using ammonia and normal butane working medium pair
(mass ratio 1:4), working medium volume accounts for the 80% of the inner space of evaporator section 8；Drill 13 deep 50m, diameter 180mm, spacing 6m, drilling
13 bottoms are backfilled using the proportioning mixture of cement, bentonite and fine sand, mass ratio 1:2:1, thermal conductivity 1.8W/ (mK), and
13 near surface regions drill using the mixture filling using cement and expanded perlite, mass ratio 1.5:1, thermal conductivity 0.1W/
(mK), and 13 mouthfuls of drilling is shut with concrete；Three heat pipes of arrangement, are fixed by clip 15, see figure in each drilling 13
7；Heat pipe condenser section 6 is embedded in roadbed, away from ground surface 5cm, slope 0.5%.
It it is -8 DEG C in air themperature, under the conditions of moderate gale, single heat pipe transimission power about 1.5kW, surface temperature is maintained at
More than 1.5 DEG C.
Embodiment 4
A kind of overlength flexible heat pipe and its underground heat snow melt de-icing method as described in Example 1, using the ring shown in Figure 10
Road overlength flexible heat pipe structure, the overall length 150m of overlength flexible heat pipe 1,8 long 90m of evaporator section, adiabatic section 7 is 20m, and condensation segment 6 is
40m, external diameter 25mm, internal diameter 21mm.Overlength flexible pipe 2 is using PB as matrix, and carborundum is made for heat filling, thermal conductivity
1.1W/ (mK), thickness 2mm, liner 0.1mm steel membranes；The liner absorbing carbon fiber wick-containing of evaporator section 8, thickness 1mm；Reservoir 4 is every
Install one additional every 2m, material is identical with overlength flexible pipe 2, and top is taper reducer union, long 30mm, bottom for Φ 40 ×
2mm shells, long 40mm, the isometrical adapter of its internal suit overlength flexible pipe 2, form bag-shaped liquid storage tank, isometrical adapter overall length
50mm, the high 30mm of liquid storage tank, structure are shown in Fig. 3, the liner liquid-sucking core 3 of reservoir 4；Internal working medium is using water and iso-butane working medium pair
(mass ratio 1:1), working medium volume accounts for the 60% of the inner space of evaporator section 8；Drill 13 deep 55m, diameter 150mm, spacing 5m, drilling
13 bottoms are backfilled using the proportioning mixture of cement, magma and fine sand, mass ratio 1:1:1, thermal conductivity 2.0W/ (mK), and bore
The near surface region of hole 13 is filled using the mixture of bentonite and foam cement, mass ratio 1:1, thermal conductivity 0.3W/ (mK), and
And 13 mouthfuls of drilling is shut with concrete；Heat pipe condenser section 6 is embedded in roadbed, away from ground surface 5cm, slope 1%.
It it is -8 DEG C in air themperature, under the conditions of moderate gale, single heat pipe transimission power about 2.5kW, surface temperature is maintained at 2
More than DEG C.
Embodiment 5
A kind of overlength flexible heat pipe and its underground heat snow melt de-icing method as described in Example 1, using the branch shown in Figure 11
Shape overlength flexible heat pipe structure, the overall length 70m of overlength flexible heat pipe 1,8 long 40m of evaporator section, adiabatic section 7 are 10m, condensation segment 6 four
Tap is respectively 5m, external diameter 32mm, internal diameter 21mm.For overlength flexible pipe 2 using silicon rubber as matrix, boron nitride is heat filling system
, thermal conductivity 1.2W/ (mK), thickness 2mm, liner 0.1mm aluminium films；The inner liner stainless steel woven wire liquid-sucking core of evaporator section 8,
Thickness 2mm；Reservoir 4 installs one additional every 2m, and material is identical with overlength flexible pipe 2, and top is taper reducer union, long
20mm, bottom are Φ 50 × 2mm shells, long 50mm, the isometrical adapter of its internal suit overlength flexible pipe 2, form bag-shaped storage
Liquid pool, isometrical adapter overall length 60mm, the high 35mm of liquid storage tank, structure are shown in Fig. 3, the liner liquid-sucking core 3 of reservoir 4；Internal working medium uses
Ammonia is with iso-butane working medium to (mass ratio 4:1), working medium volume accounts for the 60% of the inner space of evaporator section 8；Drill 13 deep 50m, diameter
100mm, spacing 4.5m, 13 bottoms of drilling are backfilled using the proportioning mixture of cement, bentonite and fine sand, mass ratio 1:2:1, heat
Conductance 1.8W/ (mK), and 13 near surface regions that drill are used and filled using the mixture of cement and expanded perlite, mass ratio
3:2, thermal conductivity 0.1W/ (mK), and drill 13 mouthfuls and shut with concrete；Heat pipe condenser section 6 is embedded in roadbed, away from ground surface
5cm, slope 2%.
It it is -8 DEG C in air themperature, under the conditions of moderate gale, single heat pipe transimission power about 1.5kW, surface temperature is maintained at 1
More than DEG C.
Claims (6)
1. a kind of overlength flexible heat pipe (1), it is characterised in that overall shell is made up of overlength flexible pipe (2), and structure is from upper past
Under be divided into condensation segment (6), adiabatic section (7) and evaporator section (8) three parts；Wherein evaporator section (8) liner liquid-sucking core (3), and every
One segment distance is welded a reservoir (4)；Heat-transfer working medium (5) is filled in heat pipe；The external diameter of wherein described overlength flexible heat pipe is
10~40mm, overall length are 40~150m；Adiabatic section (7) length is 10~20m；Condensation segment (6) is 1/ with evaporator section (8) length ratio
2~1/10；The thickness of liner liquid-sucking core (3) is 1~2mm；Evaporator section (8) is welded a reservoir (4) every 1~2m；Heat pipe
Heat-transfer working medium (5) is inside filled as ammonia and iso-butane, ammonia and normal butane, methanol and normal butane or water and iso-butane；Mass ratio is 1/4
~4/1.
2. overlength flexible heat pipe according to claim 1, it is characterised in that overlength flexible pipe (2) is by outer layer heat-conducting polymer
Material (9) forms with inner layer metal film (11) through PUR (10) bonding；The heat of wherein described heat-conducting polymer material (9)
Conductance is 1.0~1.5W/ (mK), and using plastics or rubber as matrix, filling or crosslinking heat filling are made；Described internal layer gold
It is aluminium, copper or steel to belong to film (11)；0.1~0.3mm of thickness.
3. overlength flexible heat pipe according to claim 1, it is characterised in that the volume that heat-transfer working medium (5) is filled in heat pipe is steaming
Send out the 40%~80% of section (8) inner space.
4. overlength flexible heat pipe according to claim 1, it is characterised in that reservoir (4) material and overlength flexible pipe
(2) identical, top is taper reducer union, and bottom is the larger shell of internal diameter, and its internal suit is isometrical with overlength flexible pipe (2)
Adapter, form bag-shaped liquid storage tank, reservoir (4) liner liquid-sucking core (3).
5. a kind of underground heat snow melt de-icing method based on overlength flexible heat pipe as claimed in claim 1, it is concretely comprised the following steps：Will
Overlength flexible heat pipe evaporator section (8) and adiabatic section (7) are embedded in the drilling (13) below roadbed (12) vertically, are filled out in drilling (13)
Full backfilling material (14), it is arranged in after condensation segment (6) bending with 1%~5% slope in roadbed (12)；In winter, make in the temperature difference
Under, inside heat pipe heat-transfer working medium (5) is spontaneous to be evaporated-rising-and the circulation for condensing-flowing back, draws geothermal heating roadbed, make
Pavement temperature is maintained at more than zero degree, so as to snow melt deicing.
6. underground heat snow melt de-icing method according to claim 5, it is characterised in that drilling (13) interior backfilling material (14) point
Two layers；Bottom backfilling material has thermal conduction characteristic, and thermal conductivity is at 1.8~2.3W/ (mK)；Backfilled using pressure grouting；Bore
Hole (13) region near the ground, i.e. adiabatic section (7) region, there are insulating characteristicses in 0.1~0.3W/ (mK) using thermal conductivity
Material backfills.
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| CN108611950B (en) * | 2018-01-19 | 2021-12-21 | 山东省交通规划设计院集团有限公司 | Road snow melting system for old road reconstruction of inorganic medium heat pipe and construction method |
| CN110055853A (en) * | 2018-01-19 | 2019-07-26 | 山东省交通规划设计院 | A kind of honest formula bridge floor inorganic medium heat pipe snow-melting system of bridge and mounting arrangements method |
| CN108871022A (en) * | 2018-08-22 | 2018-11-23 | 天津城建大学 | The buried gravity assisted heat pipe of big L/D ratio stage evaporation type |
| CN109295834A (en) * | 2018-11-23 | 2019-02-01 | 黑龙江省九0四环境工程勘察设计院 | A kind of cold area's pavement snow melting system |
| CN111335109A (en) * | 2020-04-10 | 2020-06-26 | 西安交通大学 | Snow-preventing and snow-melting device and method for road and bridge slope-shaped road surface |
| CN115162091A (en) * | 2022-08-03 | 2022-10-11 | 宁夏启辰智能低碳科技有限公司 | High-frost-resistance fly ash-based pervious concrete pavement |
| CN115930645A (en) * | 2022-12-01 | 2023-04-07 | 华南理工大学 | Ultrathin flexible vapor chamber structure and preparation method thereof |
| CN118242917B (en) * | 2024-05-28 | 2024-07-19 | 四川力泓电子科技有限公司 | Combined heat pipe, radiator and electronic equipment |
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| JPS60223503A (en) * | 1984-04-18 | 1985-11-08 | 昭和アルミニウム株式会社 | Heat pipe type snow melting and freezing preventing apparatus |
| CN1614150A (en) * | 2004-12-07 | 2005-05-11 | 马雷 | Apparatus for preventing railway switch from snows piling on |
| CN101749887B (en) * | 2009-12-02 | 2012-05-30 | 青岛大学 | Vertical remote cold and hot energy transporting system |
| CN102367992A (en) * | 2011-09-08 | 2012-03-07 | 博惠科技（大连）有限公司 | Flow distributor for water heaters |
| CN205980885U (en) * | 2016-06-02 | 2017-02-22 | 南京工业大学 | Ultra-long flexible heat pipe |
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