CN114606825A - Ice and snow melting system and method for buried pipe ground source heat pump road - Google Patents
Ice and snow melting system and method for buried pipe ground source heat pump road Download PDFInfo
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- 238000002844 melting Methods 0.000 title claims abstract description 53
- 230000008018 melting Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000013461 design Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 70
- 239000012530 fluid Substances 0.000 claims description 48
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000010257 thawing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T2010/50—Component parts, details or accessories
- F24T2010/56—Control arrangements
Abstract
The invention relates to the technical field of shallow geothermal application, in particular to a road ice and snow melting system of a buried pipe ground source heat pump, which comprises a ground source heat pump unit, a shallow geothermal heat exchange part structure and a heating pipeline part structure; the ground source heat pump unit is provided with a ground source side input port and a ground source side output port which are respectively connected with a heat exchange output end and a heat exchange input end of the shallow geothermal heat exchange part structure; the ground source heat pump unit is also provided with a heat supply medium output port and a heat supply medium return port; the heating pipeline part structure comprises one or more groups of road surface buried pipe groups which are arranged at intervals along the length direction of the road to be heated; the buried pipe group on the road surface comprises one or more buried pipes which are arranged at intervals along the width direction of the road to be heated. Also discloses a method for melting ice and snow on the ground source heat pump road with the buried pipe; the road ice and snow melting device has the advantages of being more reasonable in design and capable of better heating a road to better melt ice and snow.
Description
Technical Field
The invention relates to the technical field of shallow geothermal application, in particular to a system and a method for melting ice and snow on a buried pipe ground source heat pump road.
Background
In the use of large-area open facilities such as mountain roads, airport runways, expressways, municipal roads and the like, the ice and snow weather can bring huge influence, traffic passing is delayed if the weather is light, and safety accidents are caused if the weather is heavy. Therefore, when the facility is used in ice and snow weather, the snow melting and thawing operation is required, and how to solve the problem of the ice accumulation on the road is a problem not only in China but also in the world.
The conventional methods are mainly divided into two categories, namely passive snow melting and deicing technologies and active snow melting and deicing technologies, wherein the passive snow melting and deicing technologies mainly comprise manual clearing methods, mechanical clearing methods and chemical snow melting methods, and the methods are widely applied to road snow melting and deicing engineering in China, but have the problems of road (bridge) surface damage, environment pollution, high cost, use condition limitation and the like. The active snow melting technology mainly utilizes functional materials such as conductive concrete, electric heating cables and the like to heat a road surface or a bridge floor so as to achieve the purposes of snow melting and ice melting, wherein the electric heating cable snow melting method has the problem of compatibility with a road surface structure, and the electric heating cables are wrapped by thicker insulating layers on the surfaces, so that the heat efficiency is lower and the manufacturing cost is higher; although the conductive concrete method is well combined with the pavement layer, the heating is slow, and the uniform mixing of the materials is not easy to realize. The existing design of the related invention patent has the problems of high cost, incapability of performing design calculation, poor operability, limitation of use conditions and the like, and is difficult to popularize and use.
The invention aims to overcome the defects of the prior art and provides a road ice and snow melting system of a ground source heat pump with buried pipes, so as to solve the problem of snow accumulation and icing of the road.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is how to provide a system and a method for melting ice and snow on a ground source heat pump road, which have a more reasonable design and can heat the road better to complete melting ice and snow.
In order to achieve the aim, the invention provides a road ice and snow melting system of a ground source heat pump with buried pipes, which comprises a ground source heat pump unit, a shallow geothermal heat exchange part structure and a heating pipeline part structure; the ground source heat pump unit is provided with a ground source side input port and a ground source side output port which are respectively connected with a heat exchange output end and a heat exchange input end of the shallow geothermal heat exchange part structure; the ground source heat pump unit is also provided with a heat supply medium output port and a heat supply medium return port; the heating pipeline is characterized in that the heating pipeline part structure comprises one or more groups of road surface buried pipe groups which are arranged at intervals along the length direction of a road to be heated; buried pipe group includes one or more and is the buried pipe that the interval set up along treating heating road width direction, and buried pipe buckles and is the design of U-shaped and tiling setting in treating heating road pavement below, and the degree of depth direction of buried pipe U-shaped arranges along road length direction, and buried pipe inside formation medium flow space and both ends link to each other with heating medium delivery outlet and heating medium backward flow mouth respectively.
Therefore, in the ice and snow melting system for the ground source heat pump road with the buried pipes, the buried pipes are bent into a U-shaped design and are flatly laid below the road surface of the road to be heated, and then the U-shaped depth direction of the buried pipes is arranged along the length direction of the road. And underground heat energy is obtained through the ground source heat pump unit and the shallow geothermal heat exchange part structure to be supplied to the buried pipe. The arrangement of the buried pipes enables the whole road pavement to be heated better to melt ice and snow, energy consumption can be reduced better by acquiring terrestrial heat, the buried pipes are more environment-friendly, and the running cost is lower.
Furthermore, the heating pipeline part structure comprises two pavement buried pipe groups which are arranged at intervals along the length direction of the road to be heated; each buried pipe group on the pavement comprises two buried pipes which are arranged at intervals along the width direction of the road to be heated. The layout is more reasonable.
As optimization, the system also comprises a first water divider and a first water collector, wherein the output port of the heat supply medium is connected with the input end of the first water divider, and the output end of the first water divider is connected with one end of the buried pipe; the heat supply medium backflow port is connected with the input end of the first water collector, and the input end of the first water collector is connected with the other end of the buried pipe.
Like this, through setting up first water knockout drum and first water collector, can be better collect the medium of buried pipe output and flow back to ground source heat pump set in, can be better carry the medium to the buried pipe input respectively.
As optimization, the first water separator and the heat supply medium output port and the first water collector and the heat supply medium return port are connected through first pipelines respectively, and a first control valve and a first circulating pump are arranged on the two first pipelines respectively.
Like this, through set up first control valve and first circulating pump on two first pipelines respectively, can conveniently control the output and the input of buried pipe intraductal medium.
Preferably, the shallow geothermal heat exchange part structure comprises one or more than one drill holes arranged on one side of the road, heat exchange tubes with U-shaped structural designs are arranged in the drill holes, the input ends of the heat exchange tubes are connected with the output ports on the ground source side, and the output ends of the heat exchange tubes are connected with the input ports on the ground source side.
Therefore, the heat exchange tube is arranged in the drill hole through the drill hole, underground heat energy is used, and compared with the traditional power utilization, the energy-saving water heater is more energy-saving.
As optimization, the system also comprises a second water separator and a second water collector, wherein the input end of the second water separator is connected with the output end of the ground source side, and the input end of the heat exchange tube is connected with the output end of the second water separator; the output end of the second water collector is connected with the input port of the ground source side, and the input end of the second water collector is connected with the output end of the heat exchange tube.
Like this, through setting up second water knockout drum and second water collector, can make things convenient for the connection between heat exchange tube and ground source side delivery outlet and the ground source side delivery outlet more.
And as optimization, the input end of the second water separator and the output end of the ground source side and the output end of the second water collector and the input end of the heat source are respectively connected through second pipelines, and a second control valve and a second circulating pump are respectively arranged on the two second pipelines.
Like this, through setting up second control flap and second circulating pump, can conveniently control more and accomplish the circulation.
Preferably, the buried pipe is a high-density Polyethylene (PE) pipe, the pressure bearing capacity is 1.6MPA, and the pipe diameter is 25 or 32 mm.
Therefore, the material selection of the buried pipe is more reasonable, and the pressure bearing capacity can be better. Moreover, the pipe diameter is more reasonable to select, the arrangement distance is more reasonable, and the ice and snow melting work of the road can be better completed.
As optimization, the buried pipe is laid in a concrete layer of the road, and the distance between the upper side surface of the buried pipe and the upper surface of the road is 100-200 mm; the length of the buried pipes is 500-2000 m, the vertical distance between the highest point and the lowest point of each buried pipe is smaller than 100m, and the horizontal distance between any two adjacent buried pipes is 200-400 mm.
Like this, the ground pipe laying is more reasonable, can be better with heat transfer to road surface.
Furthermore, the buried pipes are connected in a hot melting mode. The system also comprises a machine room arranged on one side of the road, and the machine room can be arranged below the ground; the area of the machine room is 20-80 m2(ii) a The area of the machine room is determined according to the size of the host, the water dividing and collecting device, the circulating water pump and the like. The depth of the drill hole is 100-5 m, the horizontal distance between the drill holes is 3-5 m, the bore diameter of the drill hole is 110-130 mm, the heat exchange tube extends downwards into the drill hole and is grouted by mixed slurry of fine sand and bentonite between the heat exchange tube and the bore wall of the drill hole after the heat exchange tube reaches the bottom of the drill hole. The heat exchange tube is a high-density Polyethylene (PE) tube with the pressure bearing capacity of 1.6MPA and the diameter of 25 or 32 tubes.
The invention also discloses a method for melting ice and snow for the buried pipe ground source heat pump road, which is characterized by comprising the following steps: the ground source heat pump road ice and snow melting system is characterized by comprising the ground source heat pump road ice and snow melting system with the structure;
the lowest temperature Tn of the fluid in the buried pipe of the road pavement is controlled to release heat to the road pavement and perform ice and snow melting work when the fluid flows through any length section of the buried pipe;
obtaining Tn by adopting a formula Tn-tm +10(tm-tq) h/lambdoh;
in the formula: tn is the lowest temperature of the fluid in the road pavement heating pipe, and the unit is;
tm is the surface temperature of the road ground, and the unit is;
tq is the ambient temperature in units of;
h is the distance from the center of the heating pipe to the road surface, and the unit is m.
λ h is the thermal conductivity of the pavement concrete, and the unit is W/(m.K);
by monitoring the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out, when the monitored temperature is less than Tn, the temperature of the fluid entering the buried pipe is controlled to be increased or the flowing speed of the fluid in the buried pipe is controlled to be increased until the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out is monitored to be greater than or equal to Tn.
Thus, Tn and Tn are obtained through calculation and are the lowest temperature of the fluid in the road pavement heating pipe, the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out is monitored, and when the monitored temperature is lower than Tn, the temperature of the fluid entering the buried pipe or the flowing speed of the fluid in the buried pipe is controlled to be increased until the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out is monitored to be higher than or equal to Tn. Therefore, when the fluid flows through any length section of the buried pipe, the heat can be released to the road surface and the ice and snow melting work can be carried out. The ice and snow melting work can be better carried out, and the heat energy carried by the fluid can be better and fully utilized by regulating the temperature of the fluid when the fluid enters or regulating the speed of the fluid, so that the waste of energy is avoided.
Further, the total thermal load Qz required for the road surface is obtained according to the formula Qz — lxb × Qd, where: qz is the total heat load required by the road pavement, and the unit is KW;
l is the road length in m;
b is the road width in m;
qd is the thermal load required by a unit area of the pavement, and the unit is KW;
the total length LZ of the road pavement heating pipe is obtained according to the formula LZ which is Lxb/b 1,
in the formula: the LZ is the total length of the road pavement heating pipe, and the unit is m;
b1 is the distance b1 between road surface heating pipes, and the unit is m.
Therefore, the total heat load Qz required by the road pavement can be calculated, and the unit can be better matched according to the total heat load Qz required by the road pavement, so that waste is avoided. The buried pipe is a U-shaped horizontal buried pipe, the distance between the buried pipe and the edge of the road surface is the same as the distance between the buried pipes, namely b1，b1Preferably 0.2-0.4 m.
Further, the total length Ls of the underground pipe is calculated according to the formula: ls is kQz/Q2,
in the formula: ls is the total length (m) of the vertical buried pipe;
k is a coefficient, and is usually 1.05-1.1;
qz is the total thermal load (KW) required by the road pavement;
q2 is the heat exchange per linear meter (Kw/m) of the vertical buried pipe.
The number n of the drilled holes is calculated according to the formula: n-Ls/h 1-kQz/h 1Q2,
in the formula: n is the number of drilled holes;
ls is the total length (m) of the vertical buried pipe;
h1 is the effective buried pipe depth (m) in a single borehole.
Therefore, the total length of the buried pipe and the number of drilled holes can be better matched, and waste of resources is better avoided.
Drawings
Fig. 1 is a schematic structural diagram of a road ice and snow melting system of a ground source heat pump of a buried pipe in the embodiment of the invention.
Fig. 2 is a schematic diagram of the structure of the shallow geothermal heat exchange part in fig. 1.
Fig. 3 is a schematic view of a partial structure of the heating line of fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 3, the ice and snow melting system for the ground source heat pump road with the buried pipes comprises a ground source heat pump unit 1, a shallow geothermal heat exchange part structure 2 and a heating pipeline part structure 3; the ground source heat pump unit is provided with a ground source side input port and a ground source side output port which are respectively connected with a heat exchange output end and a heat exchange input end of the shallow geothermal heat exchange part structure; the ground source heat pump unit is also provided with a heat supply medium output port and a heat supply medium return port; the heating pipeline part structure comprises one or more groups of road surface buried pipe groups 5 which are arranged at intervals along the length direction of the road 4 to be heated; buried pipe group includes that one or more and be the buried pipe 6 that the interval set up along waiting to heat road width direction, and buried pipe buckles and is the U-shaped design and tiling setting in waiting to heat road surface below, and the degree of depth direction of buried pipe U-shaped arranges along road length direction, and buried pipe inside formation medium flow space and both ends link to each other with heating medium delivery outlet and heating medium backward flow mouth respectively.
Therefore, in the ice and snow melting system for the ground source heat pump road with the buried pipes, the buried pipes are bent into a U-shaped design and are flatly laid below the road surface of the road to be heated, and then the U-shaped depth direction of the buried pipes is arranged along the length direction of the road. And underground heat energy is obtained through the ground source heat pump unit and the shallow geothermal heat exchange part structure to be supplied to the buried pipe. The arrangement of the buried pipes enables the whole road pavement to be heated better to melt ice and snow, energy consumption can be reduced better by acquiring terrestrial heat, the buried pipes are more environment-friendly, and the running cost is lower.
Furthermore, the heating pipeline part structure comprises two pavement buried pipe groups which are arranged at intervals along the length direction of the road to be heated; each road surface buried pipe group comprises two buried pipes which are arranged at intervals along the width direction of a road to be heated. The layout is more reasonable.
In the specific embodiment, the system further comprises a first water divider 7 and a first water collector 8, wherein the output port of the heat supply medium is connected with the input end of the first water divider, and the output end of the first water divider is connected with one end of the buried pipe; the heat supply medium backflow port is connected with the input end of the first water collector, and the input end of the first water collector is connected with the other end of the buried pipe.
Like this, through setting up first water knockout drum and first water collector, can be better collect the medium of buried pipe output and flow back to ground source heat pump set in, can be better carry the medium to the buried pipe input respectively.
In this embodiment, the first water separator and the heat supply medium output port and the first water collector and the heat supply medium return port are connected by a first pipeline 9, and a first control valve 10 and a first circulating pump 11 are respectively arranged on the two first pipelines.
Like this, through set up first control valve and first circulating pump on two first pipelines respectively, can conveniently control the output and the input of buried pipe intraductal medium.
In this embodiment, the shallow geothermal heat exchange part structure includes one or more than one drill holes 12 arranged on one side of the road, heat exchange tubes 13 with U-shaped structural design are arranged in the drill holes, input ends of the heat exchange tubes are connected with output ports on the ground source side, and output ends of the heat exchange tubes are connected with input ports on the ground source side.
Therefore, the heat exchange tube is arranged in the drill hole through the drill hole, underground heat energy is used, and compared with the traditional power utilization, the energy-saving water heater is more energy-saving.
In the specific embodiment, the system further comprises a second water separator 14 and a second water collector 15, wherein the input end of the second water separator is connected with the output end of the ground source side, and the input end of the heat exchange tube is connected with the output end of the second water separator; the output end of the second water collector is connected with the input port of the ground source side, and the input end of the second water collector is connected with the output end of the heat exchange tube.
Like this, through setting up second water knockout drum and second water collector, can make things convenient for the connection between heat exchange tube and ground source side delivery outlet and the ground source side delivery outlet more.
In this embodiment, the input end of the second water separator and the output end of the ground source side and the output end of the second water collector and the input end of the heat source are respectively connected through a second pipeline 16, and a second control valve 17 and a second circulation pump 18 are respectively arranged on the two second pipelines.
Like this, through setting up second control flap and second circulating pump, can conveniently control more and accomplish the circulation.
In the present embodiment, the buried pipe is a high density Polyethylene (PE) pipe, the pressure-bearing capacity is 1.6MPA, and the pipe diameter is 25 or 32 mm.
Therefore, the material selection of the buried pipe is more reasonable, and the pressure bearing capacity can be better. Moreover, the pipe diameter is more reasonable to select, the arrangement distance is more reasonable, and the ice and snow melting work of the road can be better completed.
In the specific embodiment, the buried pipe is laid in a concrete layer of a road, and the distance between the upper side surface of the buried pipe and the upper surface of the road is 100-200 mm; the length of the buried pipes is 500-2000 m, the vertical distance between the highest point and the lowest point of each buried pipe is smaller than 100m, and the horizontal distance between any two adjacent buried pipes is 200-400 mm.
Therefore, the buried pipe is more reasonable to lay, and heat can be better transferred to the road surface.
Furthermore, the buried pipes are connected in a hot melting mode. The system also comprises a machine room arranged on one side of the road, and the machine room can be arranged below the ground; the area of the machine room is 20-80 m2(ii) a The area of the machine room is determined according to the size of the host, the water dividing and collecting device, the circulating water pump and the like. The depth of the drill hole is 100-5 m, the horizontal distance between the drill holes is 3-5 m, the bore diameter of the drill hole is 110-130 mm, the heat exchange tube extends downwards into the drill hole and is grouted by mixed slurry of fine sand and bentonite between the heat exchange tube and the bore wall of the drill hole after the heat exchange tube reaches the bottom of the drill hole. The heat exchange tube is a high-density Polyethylene (PE) tube, the pressure bearing capacity is 1.6MPA, and the tube diameter is 25 or 32.
The invention also discloses a method for melting ice and snow for the buried pipe ground source heat pump road, which is characterized by comprising the following steps: the ground source heat pump road ice and snow melting system is characterized by comprising the ground source heat pump road ice and snow melting system with the structure;
the lowest temperature Tn of the fluid in the buried pipe of the road pavement is controlled to release heat to the road pavement and perform ice and snow melting work when the fluid flows through any length section of the buried pipe;
obtaining Tn by adopting a formula Tn-tm +10(tm-tq) h/lambdoh;
in the formula: tn is the lowest temperature of the fluid in the road pavement heating pipe, and the unit is;
tm is the surface temperature of the road ground, and the unit is;
tq is the ambient temperature in units of;
h is the distance from the center of the heating pipe to the road surface, and the unit is m.
λ h is the thermal conductivity of the pavement concrete, and the unit is W/(m.K);
by monitoring the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out, when the monitored temperature is less than Tn, the temperature of the fluid entering the buried pipe is controlled to be increased or the flowing speed of the fluid in the buried pipe is controlled to be increased until the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out is monitored to be greater than or equal to Tn.
Thus, Tn and Tn are obtained through calculation and are the lowest temperature of the fluid in the road pavement heating pipe, the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out is monitored, and when the monitored temperature is lower than Tn, the temperature of the fluid entering the buried pipe or the flowing speed of the fluid in the buried pipe is controlled to be increased until the lowest temperature of the fluid in the road pavement heating pipe when the fluid flows out is monitored to be higher than or equal to Tn. Therefore, when the fluid flows through any length section of the buried pipe, the heat can be released to the road surface and the ice and snow melting work can be carried out. The ice and snow melting work can be better carried out, and the heat energy carried by the fluid can be better and fully utilized by regulating the temperature of the fluid when the fluid enters or regulating the speed of the fluid, so that the waste of energy is avoided.
Example (c): the distance from the center of the buried pipe to the road surface is 0.18 m, and the heat conductivity coefficient of the concrete on the road surface is 1.5W-
(m.K), the lowest temperature in the pipe is 8.2 ℃ when the ambient temperature is below 5 ℃ and 14.2 ℃ when the ambient temperature is below 10 ℃ according to the formula when the road surface temperature is not lower than 1 ℃.
The formula is approximately calculated for the lower limit value of the fluid temperature in the road pavement buried pipe, and the lowest temperature of the fluid in the road pavement buried pipe cannot be lower than TnOtherwise, the ice and snow melting effect cannot be achieved. Normally, the lowest temperature T in the tubenAlso the return water temperature of the buried pipe. Minimum temperature T of fluid in underground pipenCan be adjusted by the outlet water temperature (the inlet water temperature of the buried pipe), the flow velocity in the pipe and the like of the ground source heat pump unit. The heat dissipation capacity of the heating pipe, namely the heat load required by the road surface, can be calculated through parameters such as the temperature difference and the flow of the water inlet temperature and the water return temperature of the buried pipe, and the heat load required by the road surface is checked and calculated through field test or numerical simulation analysis. The temperature of the inlet water and the return water of the buried pipe is displayed or stored in real time through a thermometer (or a temperature sensor) arranged on the road surface side water dividing and collecting device.
Further, the total thermal load Qz required for the road surface is obtained according to the formula Qz — lxb × Qd, where: qz is the total heat load required by the road pavement, and the unit is KW;
l is the road length in m;
b is the road width in m;
qd is the thermal load required by a unit area of the pavement, and the unit is KW;
the total length LZ of the road pavement heating pipe is obtained according to the formula LZ which is Lxb/b 1,
in the formula: the LZ is the total length of the road pavement heating pipe, and the unit is m;
b1 is the distance b1 between road surface heating pipes, and the unit is m.
Therefore, the total heat load Qz required by the road pavement can be obtained through calculation, and the unit can be better matched according to the obtained total heat load Qz required by the road pavement, so that waste is avoided. The buried pipe is a U-shaped horizontal buried pipe, and the distance between the buried pipe and the edge of the road pavement is the same as the distance between the buried pipes, namely b1，b1Preferably 0.2-0.4 m.
Further, the total length Ls of the underground pipe is calculated according to the formula: ls kQz/Q2,
in the formula: ls is the total length (m) of the vertical buried pipe;
k is a coefficient, and is usually 1.05-1.1;
qz is the total thermal load (KW) required by the road pavement;
q2 is the heat exchange per linear meter (Kw/m) of the vertical buried pipe.
The number n of the drilled holes is calculated according to the formula: n-Ls/h 1-kQz/h 1Q2,
in the formula: n is the number of drilled holes;
ls is the total length (m) of the vertical buried pipe;
h1 is the effective buried pipe depth (m) in a single borehole.
Therefore, the total length of the buried pipe and the number of the drilled holes can be better matched, and the waste of resources is better avoided.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A road ice and snow melting system of a ground source heat pump with buried pipes comprises a ground source heat pump unit, a shallow geothermal heat exchange part structure and a heating pipeline part structure; the ground source heat pump unit is provided with a ground source side input port and a ground source side output port which are respectively connected with a heat exchange output end and a heat exchange input end of the shallow geothermal heat exchange part structure; the ground source heat pump unit is also provided with a heat supply medium output port and a heat supply medium return port; the heating pipeline is characterized in that the heating pipeline part structure comprises one or more groups of road surface buried pipe groups which are arranged at intervals along the length direction of the road to be heated; buried pipe group includes one or more and is the buried pipe that the interval set up along treating heating road width direction, and buried pipe buckles and is the design of U-shaped and tiling setting in treating heating road surface below, and the degree of depth direction of buried pipe U-shaped arranges along road length direction, and buried pipe inside formation medium flow space and both ends link to each other with heating medium delivery outlet and heating medium backward flow mouth respectively.
2. The system for melting ice and snow on a ground source heat pump road of claim 1, which is characterized in that: the system also comprises a first water separator and a first water collector, wherein the output port of the heat supply medium is connected with the input end of the first water separator, and the output end of the first water separator is connected with one end of the buried pipe; the heat supply medium return port is connected with the input end of the first water collector, and the input end of the first water collector is connected with the other end of the buried pipe.
3. The system for melting ice and snow on the ground source heat pump road of claim 2, characterized in that: the first water separator is connected with the heat supply medium output port through a first pipeline, the first water collector is connected with the heat supply medium return port through a second pipeline, and a first control valve and a first circulating pump are arranged on the two second pipelines respectively.
4. The system for melting ice and snow on a ground source heat pump road of claim 1, which is characterized in that: the shallow geothermal heat exchange part structure comprises one or more than one drill holes arranged on one side of a road, heat exchange tubes with U-shaped structural design are arranged in the drill holes, the input ends of the heat exchange tubes are connected with the output ports on the ground source side, and the output ends of the heat exchange tubes are connected with the input ports on the ground source side.
5. The system for melting ice and snow on the ground source heat pump road of claim 4, wherein: the heat exchange tube is characterized by also comprising a second water separator and a second water collector, wherein the input end of the second water separator is connected with the output end of the ground source side, and the input end of the heat exchange tube is connected with the output end of the second water separator; the output end of the second water collector is connected with the input port of the ground source side, and the input end of the second water collector is connected with the output end of the heat exchange tube.
6. The system for melting ice and snow on the ground source heat pump road of claim 5, characterized in that: the input end of the second water separator is connected with the output port of the ground source side, the output end of the second water collector is connected with the input end of the heat source through second pipelines, and a second control valve and a second circulating pump are arranged on the two second pipelines respectively.
7. The system for melting ice and snow on a ground source heat pump road of claim 1, which is characterized in that: the buried pipe is a high-density Polyethylene (PE) pipe, the pressure-bearing capacity is 1.6MPA, and the pipe diameter is 25 or 32 mm.
8. The system for melting ice and snow on a ground source heat pump road of claim 1, which is characterized in that: the buried pipe is laid in a concrete layer of a road, and the distance between the upper side surface of the buried pipe and the upper surface of the road is 100-200 mm; the length of the buried pipe is 500 to 2000m, and the vertical distance between the highest point and the lowest point of the single buried pipe is less than 100 m.
9. The ice and snow melting method for the ground source heat pump road with the buried pipe is characterized by comprising the following steps: the ground source heat pump road ice and snow melting system is characterized by comprising the ground source heat pump road ice and snow melting system as claimed in any one of claims 1 to 8;
the lowest temperature Tn of the fluid in the buried pipe of the road pavement is controlled to release heat to the road pavement and perform ice and snow melting work when the fluid flows through any length section of the buried pipe;
obtaining Tn by adopting a formula Tn ═ tm +10(tm-tq) h/lambda h;
in the formula: tn is the lowest temperature of the fluid in the road pavement heating pipe, and the unit is;
tm is the surface temperature of the road ground, and the unit is;
tq is the ambient temperature in units of;
h is the distance from the center of the heating pipe to the road surface, and the unit is m.
λ h is the thermal conductivity of the pavement concrete, and the unit is W/(m.K).
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001081711A (en) * | 1999-09-09 | 2001-03-27 | Teijin Ltd | Operation method and device of road heating |
| CN1958958A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨工业大学 | Installation of cooling and melting ice and snow for road surface and bridge road by using underground natural energy resource |
| CN201265133Y (en) * | 2008-08-28 | 2009-07-01 | 巢民强 | Road thermostatic apparatus |
| KR20090113087A (en) * | 2008-04-25 | 2009-10-29 | 조용성 | Temperature control system of road surface having double storage using subterranean heat |
| CN201459566U (en) * | 2009-01-14 | 2010-05-12 | 王双其 | Geothermal type pavement snow melting device for prompt elimination of snow on pavement |
| CN102704369A (en) * | 2012-06-28 | 2012-10-03 | 哈尔滨工业大学 | Road snow-melting system integrating solar energy with ground source heat energy and snow-melting method with same |
| CN103669163A (en) * | 2013-12-27 | 2014-03-26 | 哈尔滨理大晟源科技开发有限公司 | Energy-storing circular thermal fluid type system for snow melting and deicing |
| CN203657118U (en) * | 2013-12-20 | 2014-06-18 | 天津市天友建筑设计股份有限公司 | System using natural cold and heat source for cool and heat supply |
| CN205119565U (en) * | 2015-11-20 | 2016-03-30 | 江苏亚特尔地源科技股份有限公司 | Supplementary ground of road heat source source heat pump system |
| JP2017015364A (en) * | 2015-07-06 | 2017-01-19 | 株式会社 トラストプラン | Solar heat underground heat storage snow-melting system and its control method |
| CN207159754U (en) * | 2017-08-15 | 2018-03-30 | 依科瑞德（北京）能源科技有限公司 | Bridge floor, road surface deicing system |
| CN108589467A (en) * | 2018-02-05 | 2018-09-28 | 山东亚特尔集团股份有限公司 | Active ground source-air-source snow melt deicing device and its construction technology |
| CN110396895A (en) * | 2019-08-13 | 2019-11-01 | 吉林大学 | A kind of Power Cycle and its control method of road surface thermal-arrest and snow melt heat release |
| CN213267379U (en) * | 2020-09-08 | 2021-05-25 | 西南科技大学城市学院 | Comprehensive utilization renewable energy snow melting system |
-
2022
- 2022-03-09 CN CN202210226666.3A patent/CN114606825B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001081711A (en) * | 1999-09-09 | 2001-03-27 | Teijin Ltd | Operation method and device of road heating |
| CN1958958A (en) * | 2006-11-10 | 2007-05-09 | 哈尔滨工业大学 | Installation of cooling and melting ice and snow for road surface and bridge road by using underground natural energy resource |
| KR20090113087A (en) * | 2008-04-25 | 2009-10-29 | 조용성 | Temperature control system of road surface having double storage using subterranean heat |
| CN201265133Y (en) * | 2008-08-28 | 2009-07-01 | 巢民强 | Road thermostatic apparatus |
| CN201459566U (en) * | 2009-01-14 | 2010-05-12 | 王双其 | Geothermal type pavement snow melting device for prompt elimination of snow on pavement |
| CN102704369A (en) * | 2012-06-28 | 2012-10-03 | 哈尔滨工业大学 | Road snow-melting system integrating solar energy with ground source heat energy and snow-melting method with same |
| CN203657118U (en) * | 2013-12-20 | 2014-06-18 | 天津市天友建筑设计股份有限公司 | System using natural cold and heat source for cool and heat supply |
| CN103669163A (en) * | 2013-12-27 | 2014-03-26 | 哈尔滨理大晟源科技开发有限公司 | Energy-storing circular thermal fluid type system for snow melting and deicing |
| JP2017015364A (en) * | 2015-07-06 | 2017-01-19 | 株式会社 トラストプラン | Solar heat underground heat storage snow-melting system and its control method |
| CN205119565U (en) * | 2015-11-20 | 2016-03-30 | 江苏亚特尔地源科技股份有限公司 | Supplementary ground of road heat source source heat pump system |
| CN207159754U (en) * | 2017-08-15 | 2018-03-30 | 依科瑞德（北京）能源科技有限公司 | Bridge floor, road surface deicing system |
| CN108589467A (en) * | 2018-02-05 | 2018-09-28 | 山东亚特尔集团股份有限公司 | Active ground source-air-source snow melt deicing device and its construction technology |
| CN110396895A (en) * | 2019-08-13 | 2019-11-01 | 吉林大学 | A kind of Power Cycle and its control method of road surface thermal-arrest and snow melt heat release |
| CN213267379U (en) * | 2020-09-08 | 2021-05-25 | 西南科技大学城市学院 | Comprehensive utilization renewable energy snow melting system |
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|---|---|
| CN114606825B (en) | 2023-11-03 |
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