CN114525709B - Device for road surface solar heat collection and energy storage and geothermal energy snow melting - Google Patents
Device for road surface solar heat collection and energy storage and geothermal energy snow melting Download PDFInfo
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- CN114525709B CN114525709B CN202210172705.6A CN202210172705A CN114525709B CN 114525709 B CN114525709 B CN 114525709B CN 202210172705 A CN202210172705 A CN 202210172705A CN 114525709 B CN114525709 B CN 114525709B
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- heat pipe
- heat
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- road surface
- soil
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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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- 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
- E01C11/265—Embedded electrical heating elements ; Mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/90—Solar heat collectors using working fluids using internal thermosiphonic circulation
- F24S10/95—Solar heat collectors using working fluids using internal thermosiphonic circulation having evaporator sections and condenser sections, e.g. heat pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T50/00—Geothermal systems
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a device for road surface solar heat collection, energy storage and geothermal energy snow melting, which comprises a heat pipe which is arranged in a loop, wherein a heat transfer working medium is injected into the heat pipe, the heat pipe is sequentially divided into a road surface section, a heat insulation section and a soil section from top to bottom, the heat pipe positioned on the road surface section is arranged below the road surface with a certain gradient, the heat pipe positioned on the soil section is vertically arranged between the heat pipe and the ground, backfill materials are filled between the heat pipe positioned on the soil section and the soil, a switch control part is arranged on the heat insulation section of the heat pipe, and the switch control part is used for controlling the circulation flow of the heat transfer working medium in the heat pipe.
Description
Technical Field
The invention relates to the technical field of pavement solar energy, in particular to a device for pavement solar heat collection and energy storage and geothermal energy snow melting.
Background
In summer, the temperature of the pavement is too high due to solar irradiation, the temperature of the asphalt pavement surface layer at high temperature can reach 60-70 ℃, and partial areas can reach more than 70 ℃. Such high temperature can lead to the high temperature deformation of road surface, and when temperature suddenly falls in winter, too big difference in temperature will produce temperature stress, easily leads to the road surface to produce the shrink crack. Road traffic safety is seriously affected by snow ice on the road surface in winter, and traffic accidents are extremely easy to cause.
The solar heat collection is carried out on the road surface, the heat energy is stored in the soil, and the soil heat energy is extracted in winter for melting snow and deicing of the road, so that the temperature of the road surface in summer can be effectively reduced, the service life of the road surface is prolonged, and the snow melting and deicing of the road surface can be realized. In the prior art, sensible heat generated by the temperature change of the fluid is used for cooling and heating the pavement, the heat flux is small, a heat pump unit is required to be arranged, dense pipelines are required to be paved, the efficiency of cooling and heating the pavement is low, and the energy consumption is high.
The heat pipe device transfers heat by means of fluid phase change latent heat, and the heat transfer coefficient and the heat exchange quantity are much larger than those of a sensible heat transfer mode without phase change. The existing geothermal energy road snow melting and deicing technology using the heat pipes adopts an integral heat pipe heat exchanger, so that the soil heat energy can only be extracted in winter for road surface heating, the running is automatically stopped in summer, and the heat collection and energy storage in summer cannot be realized. The long-term operation of extracting the soil heat energy can lead to the reduction of the soil temperature in winter year by year, and can influence the snow melting and deicing effects of the heat pipes in the subsequent years.
Disclosure of Invention
The invention aims to provide a device for road surface solar heat collection and energy storage and geothermal energy snow melting, which is used for solving the problems in the prior art.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a device for road surface solar heat collection, energy storage and geothermal energy snow melting, which comprises a heat pipe which is arranged in a loop, wherein a heat transfer working medium is injected into the heat pipe, the heat pipe is sequentially divided into a road surface section, a heat insulation section and a soil section from top to bottom, the heat pipe positioned on the road surface section is arranged below the road surface with a certain gradient, a backfill material is filled between the heat pipe positioned on the soil section and the ground, a switch control part is arranged on the heat pipe, and the switch control part is used for controlling the circulation flow of the heat transfer working medium in the heat pipe.
Preferably, the switch control part comprises a first electromagnetic valve arranged on the heat pipe, the first electromagnetic valve is electrically connected with a controller, a liquid pump and a second electromagnetic valve are communicated with the heat-transfer working medium on the heat-insulating section of the heat pipe along the flowing direction of the heat-transfer working medium, the liquid pump and the second electromagnetic valve are arranged in series, the first electromagnetic valve is parallel connected with the liquid pump and the second electromagnetic valve, the second electromagnetic valve is electrically connected with the liquid pump, and the first electromagnetic valve, the second electromagnetic valve and the liquid pump are arranged on the heat-insulating section of the heat pipe.
Preferably, the liquid pump is a magnetic pump without leakage.
Preferably, the loop of the heat pipe is a stainless steel pipe with an outer surface coated with an anti-corrosion material.
Preferably, the outer wall of the heat pipe positioned at the heat insulation section is coated with a heat insulation material.
Preferably, the heat pipes located in the soil section are arranged in a U-shaped structure.
Preferably, the heat pipe located at the road surface section is arranged 8-20 cm below the road surface; the length of the heat pipe positioned at the soil section below the ground is 8-12 m.
Preferably, the heat pipes located in the road surface section are arranged below the road surface with a gradient of 1% -3%.
The invention discloses the following technical effects:
1. In summer, when the temperature difference between the road surface and the soil reaches a high-limit set value, the road surface section of the heat pipe is an evaporation section, the soil section is a condensation section, liquid in the evaporation section absorbs heat and evaporates to form vapor, the circulation of the liquid in the condensation section and the vapor in the evaporation section is realized under the circulation action of the switch control part, the vapor enters the condensation section to condense and release heat, heat is introduced into the soil through backfill materials, the liquid in the condensation section enters the evaporation section to absorb heat and evaporate under the driving of the liquid pump, the circulation is performed in such a way, the heat of the high-temperature road surface can be transferred into the soil, and when the temperature difference between the road surface and the soil reaches a low-limit set value, the liquid pump and the second electromagnetic valve are closed through the switch control part; in winter, the road surface section becomes a condensing section, the soil section becomes an evaporating section, liquid in the evaporating section absorbs heat stored in soil in summer to evaporate, the liquid flows upwards under the action of the difference of fluid density between the down pipe and the up pipe, and enters the road surface section to condense and release heat, so that the temperature of the road surface is kept above zero, and the aim of melting snow and ice is fulfilled.
2. The invention breaks through the limitation that the prior art can only extract geothermal energy by the heat pipe to melt snow and remove ice in winter, collects the road surface heat by the heat pipe in summer to store energy and supplement heat for soil, recovers the soil temperature, ensures the long-term stable snow melting and removing effect of the heat pipe, can effectively reduce the road surface temperature in summer and prolong the service life of the road surface.
3. The loop heat pipe adopted by the invention separates the evaporation process from the condensation process, and steam and liquid are provided with separate pipelines, so that compared with the integral heat pipe, the heat resistance of the evaporation section and the condensation section is reduced, the flow resistance is reduced, the gas-liquid entrainment phenomenon caused by the gas-liquid phase-wise flow of the integral heat pipe is avoided, and the heat exchange efficiency of the heat pipe is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a device for road surface solar heat collection and energy storage and geothermal energy snow melting according to the present invention;
FIG. 2 is a top view of an apparatus for road surface solar heat collection and storage and geothermal energy snow melting according to the present invention;
FIG. 3 is a schematic diagram of the device for road solar heat collection and energy storage and geothermal snow melting in summer heat collection and energy storage operation;
FIG. 4 is a schematic diagram of a device for snow melting and ice melting in winter for road solar heat collection and energy storage and geothermal energy snow melting according to the present invention;
fig. 5 is a schematic diagram of a plurality of devices for road surface solar heat collection and energy storage and geothermal energy snow melting arranged side by side.
1, A heat pipe; 2. a pavement section; 3. an insulation section; 4. a soil segment; 5. a first electromagnetic valve; 6. a second electromagnetic valve; 7. a magnetic pump; 8. backfilling materials; 9. road surface; 10. and (5) checking the well.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1:
The invention provides a device for road solar heat collection, energy storage and geothermal energy snow melting, which comprises a heat pipe 1 arranged in a loop, wherein a heat transfer working medium is injected into the heat pipe 1, the heat pipe 1 is sequentially divided into a road surface section 2, an adiabatic section 3 and a soil section 4 from top to bottom, the heat pipe 1 positioned on the road surface section 2 is arranged below the road surface with a certain gradient, the heat pipe 1 positioned on the soil section 4 is vertically arranged between the ground, a backfill material 8 is filled between the heat pipe 1 positioned on the soil section 4 and the soil, a switch control part is arranged on the adiabatic section 3 of the heat pipe 1, and the switch control part is used for controlling the circulation flow of the heat transfer working medium in the heat pipe 1.
The circulating working medium adopts R134a, and the backfill material 8 is mixed slurry of fine sand, bentonite and cement. In summer, when the temperature difference between the road surface and the soil reaches a high-limit set value, the road surface section 2 of the heat pipe 1 becomes an evaporation section, the soil section 4 becomes a condensation section, liquid in the evaporation section absorbs heat and evaporates to become vapor, the circulation of the liquid in the condensation section and the vapor in the evaporation section is realized under the circulation action of the switch control part, the vapor enters the condensation section to be condensed and released heat, heat is led into the soil through the backfill material 8, the liquid in the condensation section enters the evaporation section to absorb heat and evaporate under the driving of the liquid pump, and the circulation is performed in such a way, so that the heat of the high-temperature road surface can be transferred into the soil; in winter, the temperature difference between the road surface and the soil reaches a low limit set value, the road surface section 2 becomes a condensation section, the soil section 4 becomes an evaporation section, the liquid in the evaporation section absorbs heat stored in the soil in summer to evaporate, and flows upwards under the action of the difference of the fluid density between the down pipe and the up pipe, and enters the road surface section 2 to be condensed and released, so that the road surface temperature is kept above zero, and the aim of melting snow and ice is fulfilled.
Further, the switch control part comprises a first electromagnetic valve 5 arranged on the heat pipe 1, the first electromagnetic valve 5 is electrically connected with a controller, a liquid pump and a second electromagnetic valve 6 are communicated on the heat pipe 1 heat insulation section 3 along the flow direction of a heat transfer working medium, the liquid pump and the second electromagnetic valve 6 are arranged in series, the first electromagnetic valve 5 is arranged in parallel with the liquid pump and the second electromagnetic valve 6, the second electromagnetic valve 6 and the liquid pump are electrically connected with the controller, and the first electromagnetic valve 5, the second electromagnetic valve 6 and the liquid pump are arranged on the heat pipe 1 heat insulation section 3.
When the heat pipe is used in summer, the pavement section 2 of the heat pipe 1 absorbs heat and evaporates, the second electromagnetic valve 6 and the liquid pump are opened through the controller at the moment, and the vapor in the pavement section 2 and the liquid in the soil section 4 circulate under the action of the liquid pump. In winter, the liquid pump and the second electromagnetic valve 6 are closed, the first electromagnetic valve 5 is opened, the liquid in the soil section 4 absorbs heat stored in soil in summer to evaporate, the liquid flows upwards under the action of the fluid density difference between the down pipe and the up pipe, and the liquid in the pavement section 2 flows downwards into the soil section 4 to realize circulation.
Further, the liquid pump is a magnetic pump 7 without leakage.
Further, the loop of the heat pipe 1 is a stainless steel pipe with an anti-corrosion material coated on the outer surface.
Further, the outer wall of the heat pipe 1 positioned in the heat insulation section 3 is coated with a heat insulation material. The heat insulating material is heat insulating foam.
Further, the heat pipe 1 located in the soil section 4 is provided in a U-shaped structure.
Further, the heat pipe 1 positioned on the road surface section 2 is arranged at 8-20 cm below the road surface; the length of the heat pipe 1 positioned in the soil section 4 below the ground is 8-12 m.
Further, the heat pipe 1 located in the road surface section 2 is arranged under the road surface at a gradient of 1% -3%.
In the concrete implementation mode, drilling holes beside a roadbed, wherein the drilling depth is 8-12 m, vertically inserting a soil section 4 of a heat pipe 1 into the drilling holes, pouring mixed slurry of fine sand, bentonite and cement between the heat pipe 1 and soil, arranging a road surface section 2 of the heat pipe 1 at a position 8-20 cm below a road surface at a gradient of 1% -3%, coating heat preservation foam on the outer wall of a heat insulation section 3 of the heat pipe 1 for heat preservation, when the temperature difference between the road surface and the soil reaches a set value in summer, opening a second electromagnetic valve 6 and a magnetic pump 7 through a controller, evaporating liquid in the road surface section 2 of the heat pipe 1 to form vapor, enabling the liquid in the soil section 4 to enter the road surface section 2 for evaporation under the action of the magnetic pump 7, condensing and releasing heat in the soil section 4, storing the heat of a high-temperature road surface into the soil, and closing the magnetic pump 7 and the second electromagnetic valve 6 through a switch control part when the temperature difference between the road surface and the soil reaches a low limit set value; in winter, the first electromagnetic valve 5 is opened by the controller, the second electromagnetic valve 6 and the magnetic pump 7 are closed, the liquid in the soil section 4 absorbs the heat of the soil to evaporate, the vapor flows upwards under the action of the difference of the fluid density between the down pipe and the up pipe, and the heat is released by condensation in the pavement section 2, so that the pavement temperature is kept above zero, and the aim of melting snow and ice is fulfilled.
Example 2:
in practice, the pipe spacing of one heat pipe 1 is 250-300 mm, a plurality of heat pipes 1 are required to be arranged side by side on the road surface 9, the plurality of heat pipes 1 are controlled by the same controller, and the heat insulation section 3 and the switch control part are positioned in the inspection well 10. In order to better control the liquid supply amount of the liquid pump, the liquid pumps of the heat pipes 1 control the rotating speed and the flow rate by the same frequency converter, the power supply frequency is 10-20 Hz when the liquid pump is started, and the liquid pump circulates at a smaller flow rate so as to avoid vapor inhalation of the liquid pump; the power supply frequency after stable operation is 20-50 Hz.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (6)
1. The device for road solar heat collection, energy storage and geothermal energy snow melting is characterized by comprising a heat pipe (1) which is arranged in a loop, wherein a heat transfer working medium is injected into the heat pipe (1), the heat pipe (1) is sequentially divided into a road section (2), an adiabatic section (3) and a soil section (4) from top to bottom, the heat pipe (1) which is positioned on the road section (2) is arranged below a road surface with a certain gradient, the heat pipe (1) which is positioned on the soil section (4) is vertically arranged between the ground, a backfill material (8) is filled between the heat pipe (1) and the soil which is positioned on the soil section (4), a switch control part is arranged on the adiabatic section (3) of the heat pipe (1), and the switch control part is used for controlling the circulation flow of the heat transfer working medium in the heat pipe (1);
The switch control part comprises a first electromagnetic valve (5) arranged on the heat pipe (1), the first electromagnetic valve (5) is electrically connected with a controller, a liquid pump and a second electromagnetic valve (6) are communicated with the heat insulation section (3) of the heat pipe (1) along the flow direction of the heat transfer working medium, the liquid pump and the second electromagnetic valve (6) are arranged in series, the first electromagnetic valve (5) is connected in parallel with the liquid pump and the second electromagnetic valve (6), the second electromagnetic valve (6) and the liquid pump are electrically connected with the controller, and the first electromagnetic valve (5), the second electromagnetic valve (6) and the liquid pump are arranged on the heat insulation section (3) of the heat pipe (1);
the heat pipe (1) located in the road surface section (2) is arranged under the road surface with a gradient of 1% -3%.
2. The device for road surface solar heat collection and energy storage and geothermal energy snow melting according to claim 1, wherein: the liquid pump is a magnetic pump (7) without leakage.
3. The device for road surface solar heat collection and energy storage and geothermal energy snow melting according to claim 1, wherein: the loop of the heat pipe (1) is a stainless steel pipe with the outer surface coated with an anti-corrosion material.
4. The device for road surface solar heat collection and energy storage and geothermal energy snow melting according to claim 1, wherein: the outer wall of the heat pipe (1) positioned in the heat insulation section (3) is coated with a heat insulation material.
5. The device for road surface solar heat collection and energy storage and geothermal energy snow melting according to claim 1, wherein: the heat pipe (1) positioned in the soil section (4) is arranged into a U-shaped structure.
6. The device for road surface solar heat collection and energy storage and geothermal energy snow melting according to claim 1, wherein: the heat pipe (1) positioned on the pavement section (2) is arranged at a position 8-20 cm below the pavement; the length of the heat pipe (1) positioned in the soil section (4) is 8-12 m below the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172705.6A CN114525709B (en) | 2022-02-24 | 2022-02-24 | Device for road surface solar heat collection and energy storage and geothermal energy snow melting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172705.6A CN114525709B (en) | 2022-02-24 | 2022-02-24 | Device for road surface solar heat collection and energy storage and geothermal energy snow melting |
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| CN114525709A CN114525709A (en) | 2022-05-24 |
| CN114525709B true CN114525709B (en) | 2024-05-17 |
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2022
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| JPH07190503A (en) * | 1993-12-27 | 1995-07-28 | Fumio Hiraga | Method and apparatus for collecting terrestrial heat |
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