CN202116965U - Thermoelectric conversion device for heat transfer of asphalt concrete road - Google Patents

Thermoelectric conversion device for heat transfer of asphalt concrete road Download PDF

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Publication number
CN202116965U
CN202116965U CN2011200978463U CN201120097846U CN202116965U CN 202116965 U CN202116965 U CN 202116965U CN 2011200978463 U CN2011200978463 U CN 2011200978463U CN 201120097846 U CN201120097846 U CN 201120097846U CN 202116965 U CN202116965 U CN 202116965U
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China
Prior art keywords
heat
transfer
bituminous concrete
thermoelectric conversion
temperature
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Expired - Fee Related
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CN2011200978463U
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Chinese (zh)
Inventor
王家主
卜力平
林飞峰
邹晓斌
林斌
王立
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FUJIAN TRAFFIC INSTITUTE OF SCIENCE AND TECHNOLOGY
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FUJIAN TRAFFIC INSTITUTE OF SCIENCE AND TECHNOLOGY
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Abstract

The utility model relates to a thermoelectric conversion device for the heat transfer of an asphalt concrete road, which is capable of effectively adjusting the internal temperature of asphalt concrete and converting transferred heat into electrical energy. The device comprises a heat conductive device, a heat absorption device, a constant-temperature device and a temperature difference power generation device. The heat conductive device is connected with the heat absorption device through a hot pipe. The hot end of the hot pipe for transferring heat is embedded in the asphalt concrete. The cold end of the hot pipe is arranged in the heat absorption device. A plurality of serial temperature difference power generation sheets are arranged between the heat absorption device and the constant-temperature device. The thermoelectric conversion device for the heat transfer of the asphalt concrete road disclosed by the utility model is capable of retarding rapid rise of road temperature during the day, accelerating temperature reduction at night and converting heat of the road into electrical energy so that the application of photo-thermal reflective coatings and cooling water can be reduced, therefore, an effect of prolonging the service life of the asphalt road, saving energy and reducing emission can be realized.

Description

The thermoelectric conversion device of bituminous concrete road transfer of heat
Technical field
The utility model relates to a kind of thermoelectric conversion device, particularly a kind of thermoelectric conversion device that is used for bituminous concrete road transfer of heat.
Background technology
Flexible pavement has advantages such as driving is comfortable, repairing is quick, antiskid noise reduction, traffic safety, is widely used in speedway, urban road, bridge overlay and airfield runway etc.From " 15 " beginning, the expressway construction develop rapidly of China, by the Eleventh Five-Year Plan end, the speedway mileage open to traffic has reached 7.4 ten thousand kilometers, is sure to occupy the second in the world.Wherein, except few part special road section is the cement pavement, all are flexible pavements.Along with town road changes popularizing of black-labour journey in vain, and spread to the popularization of lower grade highways such as state's provincial highway, the mileage of flexible pavement all increased with year.
As dark-coloured pavement, flexible pavement absorbed radiation energy power is strong, can reach 0.9 to the absorption coefficient of solar radiation, the road surface temperature rise, and energy storage is big, and pavement temperature can reach 70 ° of C during summer high temperature.The rising of temperature has adverse effect for this viscoelastic material of pitch, and along with the rising of temperature, pitch is softening gradually; The road surface bearing capacity descends; Under the driving load action, distortion begins to produce, and the accumulation of expendable plastic strain finally causes the destruction on road surface.In the city, dark-coloured pavement absorbs a large amount of heat daytime, and to evening, these heats that are stored in the road surface begin to discharge, and cause the rising of environment temperature, and the heat island effect in aggravation city especially during the broiling summer, influences more obvious.
The method of flexible pavement cooling mainly contains in the world at present: brushing photothermal reflectance type coating, use decolouring pitch and directly watering.Preceding two kinds of methods mainly are to reduce the absorption of flexible pavement to solar radiation, but light road surface is not good to the driving inductivity, influences travel safety.Watering then is mainly used on the urban road, needs more manpower and materials and water, but because the evaporation and the loss of moisture, the temperature drop retention time is shorter.
Summary of the invention
The purpose of the utility model is to provide a kind of can effectively regulate the bituminous concrete internal temperature, and the heat that shifts is converted into the thermoelectric conversion device of the bituminous concrete road transfer of heat of electric energy.
Realize the technical scheme of the utility model: it comprises heat-transfer device, heat sink, thermostat, and temperature difference electricity generation device; Through heat pipe heat-transfer device is linked to each other with heat sink, the hot junction of the heat pipe that is used to conduct heat is embedded in the bituminous concrete, and the cold junction of heat pipe is arranged in the heat sink, is provided with some thermo-electric generation sheets of connecting between heat sink and the thermostat.
The utlity model has following advantage:
⑴ can delay the flexible pavement heating rate under the illumination, reduce the road surface internal temperature, reduce rut softening because of flexible pavement and that vehicle heavy duty comprehensive function causes and destroy.
⑵ round-the-clock automatic adjusting pavement temperature reduces the road surface difference variation, reduces heating rate daytime, improves rate of temperature fall evening, keeps the normal temperature state of bituminous concrete, strengthens the durability on road surface, prolongs the application life on road surface.
⑶ effectively utilized the heat absorption function on dark asphalt road surface, and the heat that shifts is converted into green electric energy.
⑷ need not to change color, the structural behavior of road surfaces, kept the good skid resistance of flexible pavement, and the driving inducing function is good.
⑸ need not the sprinkling truck watering, practiced thrift great amount of water resources, meets the demand for development of energy-saving and emission-reduction, low-carbon economy.
Description of drawings
Fig. 1 is the fundamental diagram of the utility model.
Fig. 2 the utility model image data is used the structure of models sketch map.
Label declaration
1 heat-transfer device, 11 heat pipes, 12 heat transfer liquid, 2 heat sinks, 21 heat absorption casings, 22 heat absorption liquid, 3 thermostats, 31 thermostatic box, 32 constant temperature liquid, 4 temperature difference electricity generation devices, 5 heat insulating materials, 6 bituminous concrete roads, 7 infrared bulbs.
The specific embodiment
As shown in Figure 1: it comprises heat-transfer device 1, heat sink 2, thermostat 3, and temperature difference electricity generation device 4; Link to each other through heat pipe between heat-transfer device and the heat sink, the hot junction of the heat pipe that is used to conduct heat is embedded in the bituminous concrete, and the cold junction of heat pipe is arranged in the heat sink, is provided with some thermo-electric generation sheets of connecting between heat sink and the thermostat.Through heat-transfer device the heat on road surface is conducted to heat sink, the heat sink temperature raises, and makes between heat sink and the thermostat and forms the temperature difference, generates electricity through temperature difference electricity generation device.
Described heat-transfer device is a heat pipe 11; Heat transfer liquid 12 is housed in the heat pipe; The hot junction of heat pipe is embedded in the bituminous concrete road and is advisable apart from 5 ~ 8cm place, surface; Because this level is the main basal seat area of bituminous concrete shear stress, receive the effect flexible pavement of wheel to be prone to take place shear failure when temperature is high, wherein the hot junction of heat pipe is embedded in the surperficial 6cm of the interior distance of bituminous concrete place for best.The heat pipe cold junction slightly is inclined upwardly.
Described adopting heat pipes for heat transfer liquid can be water, acetone or methyl alcohol, and the operating temperature of three kinds of liquid is respectively 50 ~ 250 ℃, 20 ~ 120 ℃, 30 ~ 130 ℃.General flexible pavement internal temperature is between 15 ~ 60 ℃, and shear failure very easily takes place during greater than 50 ℃ the temperature of bituminous concrete.This device is a major function to reduce pavement temperature, so the liquid that generally conducts heat adopts acetone, considers economy, can adopt water.
Described heat sink comprises heat absorption casing 21 and the heat absorption liquid 22 that is arranged in the heat absorption casing; The heat absorption casing adopts the big material of coefficient of thermal conductivity; The cold junction of heat pipe runs through endothermic box body wall face, extends in the heat absorption casing, places the heat absorption liquid in the heat absorption casing; Transmission heat guarantees that pavement temperature is unlikely to rise too fast too high so timely.Adopt the big casing of coefficient of thermal conductivity can high temperature be passed to the hot side of thermo-electric generation sheet.
Thermostat comprises thermostatic box 31 and the constant temperature liquid 32 that is arranged in the thermostatic box, and thermostatic box adopts the big material of coefficient of thermal conductivity, and constant temperature liquid is the big liquid of specific heat capacity, and is not less than heat absorption liquid.The main effect of thermostat is the temperature that keeps lower, draws back with the temperature difference of heat sink as far as possible, adopts the big casing of coefficient of thermal conductivity can low temperature be passed to the huyashi-chuuka (cold chinese-style noodles) of thermo-electric generation sheet.
Temperature difference electricity generation device is the thermo-electric generation sheet that sticks between the adjacent wall with thermostat of heat sink, and the use of can connecting of a plurality of thermo-electric generation sheets increases generated energy, and thermo-electric generation sheet series terminal also can be established electric storage means, is used for store electrical energy.
Exposed heat pipe adopts heat insulating material 4 to wrap up between heat-transfer device and the heat sink.Heat pipe one end is embedded in the bituminous concrete, and heat sink is arranged on the road both sides, between heat-transfer device and heat sink; Part in the middle of the heat pipe can come out; In order to improve heat transference efficiency, reduce heat waste, so need be at exposed heat pipe surface coverage heat insulating material.
The concrete construction sequence of the utility model is following:
⑴ heat pipe is buried underground
When bituminous concrete moulding or flexible pavement making, bury heat pipe underground according to certain interval, the hot junction of heat pipe is positioned at inside concrete, about 6cm apart from the surface, cold junction is outside.
⑵ heat sink is installed
The heat pipe cold junction is inserted in the heat sink, near the bottom of device, be convenient to the convection current of liquid as far as possible, and in device, fill with the less heat absorption liquid of specific heat capacity (temperature is prone to raise), simultaneously with the exposed heat pipe section of heat insulating material parcel.
⑶ thermostat is installed
In device, fill with the bigger liquid of specific heat capacity, let the temperature of liquid keep stable as far as possible, be difficult for raising.
⑷ install the thermo-electric generation sheet
As required, some thermo-electric generation sheets are installed, the thermo-electric generation sheet closely is pasted on the wall between heat sink and the thermostat.When heat pipe was started working, the temperature in the heat sink began to raise, and produced temperature difference with thermostat, caused the temperature difference at thermo-electric generation sheet two ends, and then impelled the generation of voltage.The use of can connecting of thermo-electric generation sheet increases voltage output.
In order effectively to gather related data; Can be according to operating principle; With the utility model reduced scale, like Fig. 2: be installed in the laboratory, install environmental chamber additional; Environmental test calculates or gathers different regions flexible pavement interior temperature distribution with solar radiation change of time, thermoelectric conversion efficiency and other relevant data parameters.
Concrete experimental procedure is following:
Adopt tuff and SBS modified bitumen, 2 of the AC-16C bituminous concrete test blocks of indoor moulding 300mm * 300mm * 100mm, a pipe laying not; Bury 3 of hydro-thermal pipes in another piece; Spacing 10cm, heat pipe diameter 20mm, length 500mm; Be embedded in the inner 20cm of bituminous concrete, a hot junction buried depth is apart from surperficial 6cm.The bottom surface that reaches all around of concrete block wraps up with plastic foam, and environmental chamber adopts plank to make, and 30cm highly locates to install the infrared bulb 7 acceleration simulated solar illumination of 4 150W apart from the bituminous concrete surface.Heat sink and thermostat casing all adopt stainless steel to process; Inner liquid all adopts water, and the cold junction head of heat pipe is inserted in the water of heat sink, and exposed part is used sponge wrapping; Paste 1 plate thermo-electric generation sheet (40mm * 40mm * 3.6mm, 127 pairs of PN junctions) at the adjacent wall of stream oriented device.
Interior temperature is controlled at 25 ℃ during test, opens infrared lamp and carries out, and extinguishes behind the heating 90min, and result of the test is following.
⑴ the inner programming rate of bituminous concrete test block that be embedded with heat pipe is not less than burying the heat pipe test block, and it is slow more to heat up near the position in heat pipe hot junction more, arrives 50 ℃ time for 8cm degree of depth place temperature, and not having the pipe test block is 70min, and the pipe laying test block is 90min.
⑵ be embedded with the cooling rate of heat pipe test block obviously greater than not burying the heat pipe test block, and the cooling extent of pipe laying test block exceeds 10 ℃ approximately in the 90min time, and the cooling extent at 8cm degree of depth place is not have 2.6 times that manage test block.
⑶ behind the illumination 90min, under Heat Transfer of Heat Pipe on Heat Pipe, the water temperature in the heat sink is high 17 ℃ than the water temperature in the thermostat, and the voltage of generation reaches 240mV.

Claims (8)

1. the thermoelectric conversion device of a bituminous concrete road transfer of heat, it is characterized in that: it comprises heat-transfer device, heat sink, thermostat, and temperature difference electricity generation device; Link to each other through heat pipe between heat-transfer device and the heat sink, the hot junction of the heat pipe that is used to conduct heat is embedded in the bituminous concrete, and the cold junction of heat pipe is arranged in the heat sink, is provided with temperature difference electricity generation device between heat sink and the thermostat.
2. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 1; It is characterized in that: described heat-transfer device is a heat pipe; Heat transfer liquid is housed in the heat pipe, and the hot junction of heat pipe is embedded in 5 ~ 8cm place, distance surface in the bituminous concrete, and the heat pipe cold junction slightly is inclined upwardly.
3. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 2 is characterized in that: described heat transfer liquid can be water, acetone or methyl alcohol.
4. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 2 is characterized in that: it is best apart from surperficial 6cm place that the hot junction of described heat pipe is embedded in bituminous concrete interior.
5. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 1; It is characterized in that: described heat sink comprises heat absorption casing and the heat absorption liquid that is arranged in the heat absorption casing, and the heat absorption casing adopts the big material of coefficient of thermal conductivity, and the cold junction of heat pipe runs through endothermic box body wall face; Extend in the heat absorption casing; Place the heat absorption liquid in the heat absorption casing, thermostat comprises thermostatic box and the constant temperature liquid that is arranged in the thermostatic box, and thermostatic box adopts the big material of coefficient of thermal conductivity; Constant temperature liquid is the big liquid of specific heat capacity, and the specific heat capacity of heat absorption liquid is not more than constant temperature liquor ratio thermal capacitance.
6. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 1 is characterized in that: temperature difference electricity generation device is the thermo-electric generation sheet that is installed between heat sink and the thermostat, and a plurality of thermo-electric generation sheet series connection are used.
7. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 1 is characterized in that: exposed heat pipe adopts heat insulating material to wrap up between heat-transfer device and the heat sink.
8. the thermoelectric conversion device of bituminous concrete road transfer of heat according to claim 6 is characterized in that: thermo-electric generation sheet series terminal also is provided with electric storage means.
CN2011200978463U 2011-04-06 2011-04-06 Thermoelectric conversion device for heat transfer of asphalt concrete road Expired - Fee Related CN202116965U (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545720A (en) * 2012-02-24 2012-07-04 山东大学 Generation system using temperature difference between city asphalt pavement and underground water source pipeline
CN103633882A (en) * 2013-11-27 2014-03-12 朱顺敏 Heat conduction asphalt concrete road surface temperature difference power generation system
CN105484128A (en) * 2016-01-15 2016-04-13 中铁三局集团有限公司 Summer road cooling protection and heat recovery system
CN106949686A (en) * 2016-12-30 2017-07-14 中广核太阳能开发有限公司 The temperature automatically controlled cooling system of high temperature tank foundation
CN109082292A (en) * 2018-09-04 2018-12-25 福建海峡能源集团股份有限公司 A kind of technique for extracting pitch from putty slag
CN109914177A (en) * 2019-04-10 2019-06-21 陈双红 Asphalt concrete pavement crosses solarization restorative procedure and system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545720A (en) * 2012-02-24 2012-07-04 山东大学 Generation system using temperature difference between city asphalt pavement and underground water source pipeline
CN102545720B (en) * 2012-02-24 2014-11-26 山东大学 Generation system using temperature difference between city asphalt pavement and underground water source pipeline
CN103633882A (en) * 2013-11-27 2014-03-12 朱顺敏 Heat conduction asphalt concrete road surface temperature difference power generation system
CN105484128A (en) * 2016-01-15 2016-04-13 中铁三局集团有限公司 Summer road cooling protection and heat recovery system
CN105484128B (en) * 2016-01-15 2018-02-23 中铁三局集团有限公司 A kind of summer road cooling protection and heat recovery system
CN106949686A (en) * 2016-12-30 2017-07-14 中广核太阳能开发有限公司 The temperature automatically controlled cooling system of high temperature tank foundation
CN109082292A (en) * 2018-09-04 2018-12-25 福建海峡能源集团股份有限公司 A kind of technique for extracting pitch from putty slag
CN109082292B (en) * 2018-09-04 2019-10-25 福建海峡能源集团股份有限公司 A kind of technique for extracting pitch from putty slag
CN109914177A (en) * 2019-04-10 2019-06-21 陈双红 Asphalt concrete pavement crosses solarization restorative procedure and system

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120118

Termination date: 20180406

CF01 Termination of patent right due to non-payment of annual fee