CN203249781U - Nanofluid heat pipe device used for frozen soil soaking - Google Patents
Nanofluid heat pipe device used for frozen soil soaking Download PDFInfo
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- CN203249781U CN203249781U CN 201320045396 CN201320045396U CN203249781U CN 203249781 U CN203249781 U CN 203249781U CN 201320045396 CN201320045396 CN 201320045396 CN 201320045396 U CN201320045396 U CN 201320045396U CN 203249781 U CN203249781 U CN 203249781U
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- heat pipe
- frozen soil
- soaking
- thermopair
- nanofluid
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a nanofluid heat pipe device used for frozen soil soaking. The device comprises a soaking heat pipe, a humidity analyser, a computer, a humidity regulator, and a thermocouple multipath inspection instrument. The soaking heat pipe is filled with nanofluid. An evaporation section of the soaking heat pipe is inserted into simulated frozen soil bottom layer, and a condensation section is exposed out of a surface layer of the frozen soil. Detection ends of the humidity analyser are disposed in every typical area. A terminal of the humidity analyser is connected with the computer. The computer is connected with the humidity regulator. Thermocouples in gradient distribution are disposed in the simulated frozen soil typical areas and around a pipe wall of the soaking heat pipe. The thermocouples are connected with the thermocouple multipath inspection instrument, and the thermocouple multipath inspection instrument is connected with the computer. The device is simple in structure, low in cost, and convenient in use, and can measure soaking performance of the nanofluid heat pipe under low-temperature frozen soil environment.
Description
Technical field
The utility model relates to a kind of nanofluid heat pipe device for the frozen soil soaking.
Background technology
Nano-fluid is as a kind of novel augmentation of heat transfer working medium, and being mainly used in diphasic flow and heat transfer aspect, particularly gas-liquid two-phase mobile will be the effective way that increases substantially heat transfer effect.The solution that the research of nano-fluid is applied as some difficult problems of many high-tech areas aspect provides new method and thinking, as: (1) utilizes nano-fluid that engine is worked under the temperature of more optimizing, make less, lighter that cooling system does, thus the fuel saving consumption.(2) guarded blade utility knife that is used for machining cools off, and can improve the process velocity precision of workpiece, and prolongs cutting-tool's used life.(3) be used for power electronics industry, heat dissipation problem is operational efficiency, speed, the important restriction factor in life-span of a lot of devices such as computing machine, microelectronics, micromotor, large-size machine, transformer, integrated circuit, communication system etc., and efficient nano fluid cooling technology then can play a significant role.(4) be used for the refrigerant of heating ventilation air-conditioning system and the heating agent that sun power reclaims, can greatly improve its heat exchange property, reduce volume, raise the efficiency.(5) for the manufacture of various more efficient heat interchanger, heating radiator and heat pipe heat exchanging device etc.
Be accompanied by the step of development of the West Regions, at present in the design and protection of permafrost area embankment and ground, mainly contain two class measures, one class is so-called passive measure, namely reduce the heat that imports the ground ever frost into, but under the overall situation that Global Temperature raises, this class measure is some fatal shortcomings; One class is the protection of permafrost measure of enthusiasm, and the measure of namely cooling off frozen soil is adopted in Qinghai-Tibet Railway construction at present in a large number, and the characteristics of this class measure are the earth temperature controlling of taking the initiative.Wherein one of the most vital version is the hot pin roadbed, its feature is to take full advantage of natural energy resources, according to the heat pipe for thermal conductivity principle, under action of thermal difference, drive the vapour-liquid two-phase convection circulation of internal refrigeration storage working medium, by the effect of evaporator section evaporation endothermic, frozen soils temperature around reducing increases the cold storage of frozen soil itself, improves thermal stability.
Summary of the invention
In order to solve the antifreeze problem of Frozen Ground Area roadbed, the utility model proposes the good nanofluid heat pipe device that is used for the frozen soil soaking of a kind of low temperature self-starting, soaking performance.
The technical scheme that the utility model solves above-mentioned technical matters is: comprise the soaking heat pipe, moisture analyser, computing machine, humidistat, the thermopair multiplex inspector, in the soaking heat pipe nano-fluid is housed, the evaporator section of soaking heat pipe inserts simulation frozen soil bottom, condensation segment exposes the frozen soil top layer, the end of probe of moisture analyser is arranged in each representative region of frozen soil layer, the terminal of moisture analyser is connected with computing machine, computing machine is connected with humidistat, near the tube wall of simulation frozen soil layer representative region and soaking heat pipe, be furnished with the thermopair of distribution gradient, thermopair is connected with the thermopair multiplex inspector, and the thermopair multiplex inspector is connected with computing machine.
Further, described nano-fluid adopts Fe
3O
4, described simulation frozen soil layer adopts cylindrical shape to arrange, and the sample periphery is adopted the aluminium foil parcel.
Further, described simulation frozen soil layer adopts the common red clay of Changsha city, puts into the constant temperature oven refrigeration before the experiment to-15 ℃, and keeping the internal simulation environment temperature is the steady state value of design temperature.
Further, described moisture analyser employing JY2-PTS-1 type soil humidity sensor is measured the water cut in the frozen soil, and the end of probe of described moisture analyser is hygristor.
Technique effect of the present utility model is:
(1) the utility model is simple in structure, cost is low, easy to use, be a kind of nanofluid heat pipe device that is used for preferably the frozen soil soaking.
(2) the nano-fluid soaking heat pipe that proposes possesses better thermal conductivity, less heat transfer temperature difference, larger heat-transfer capability, wider Applicable temperature scope, longer serviceable life and the work efficiency of Geng Gao, the new and effective heat pipe that has good soaking performance for exploitation provides new approaches.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Referring to Fig. 1, the utility model comprises soaking heat pipe 1, moisture analyser 4, computing machine 5, humidistat 6, thermopair multiplex inspector 8, in the soaking heat pipe 1 nano-fluid is housed, the evaporator section 2 of soaking heat pipe 1 inserts simulation frozen soil bottom, condensation segment 3 exposes the frozen soil top layer, the end of probe 9 of moisture analyser 4 is arranged in each representative region of frozen soil layer, the terminal of moisture analyser 4 is connected with computing machine 5, computing machine 5 is connected with humidistat 6, near the tube wall of simulation frozen soil layer representative region and soaking heat pipe 1, be furnished with the thermopair 7 of distribution gradient, thermopair 7 is connected with thermopair multiplex inspector 8, and thermopair multiplex inspector 8 is connected with computing machine 5.
Described nano-fluid adopts Fe
3O
4, described simulation frozen soil layer adopts cylindrical shape to arrange, and the sample periphery is adopted the aluminium foil parcel.
Described simulation frozen soil layer adopts the common red clay of Changsha city, puts into the constant temperature oven refrigeration before the experiment to-15 ℃, and keeping the internal simulation environment temperature is the steady state value of design temperature.
Described moisture analyser 4 employing JY2-PTS-1 type soil humidity sensors are measured the water cut in the frozen soil, the end of probe 9 of described moisture analyser 4 is hygristor, humidistat 6 is by the moisture content change in the space multistory distribution measuring frozen soil of hygristor, water content in the corresponding adjusting frozen soil, thus simulate real frozen soil environment.
7 pairs of frozen soil layer temperature spaces of described thermopair distribution measuring, 8 pairs of signals of described thermopair multiplex inspector are collected, and result's scanning is input in the computing machine, carries out recording drawing with Labview software.
Select stainless steel ICr18Ni9Ti material to make novel soaking heat resistant material, this material can bear pressure and the external corrosion of inner low boiling working fluid, can be good at satisfying requirement of experiment, has chosen simultaneously Fe
3O
4(tri-iron tetroxide) and liquefied ammonia are as the heat-exchange working medium of filling.The nano-fluid that configures is charged in the heat pipe, then heat pipe is evacuated, and sealing.The long 3000mm of steel pipe, external diameter 60mm, wall thickness 2mm, evaporation segment length 1800mm, condensation segment length 1200mm.
During experiment, the together existing heat pipe of the heat pipe take nano-fluid as working medium, hot pin are inserted respectively in the simulation frozen soil and test, the evaporator section of each heat pipe inserts simulation frozen soil bottom, and condensation segment exposes the frozen soil top layer.The variation in measuring frozen layer temperature field, thus the correlation parameters such as speed of heat pipe in equal thermal process obtained, draw out corresponding curve map, according to graph data new heat pipe and existing heat pipe, hot pin are compared.The situation of change in temperature field is mainly measured by the space distribution of thermopair, uses the thermopair multiplex inspector to carry out signal collection, then passes through Computer Processing, is depicted as corresponding curve map.Experimental result shows, frozen soil layer has been used after the nano-fluid soaking heat pipe, and the frozen soil layer bulk temperature under the variant environment temperature state has realized equilibrium, and the gradient that has substantially presented a meta stable state distributes; The soaking performance of nano-fluid soaking heat pipe has limited the temperature difference amplitude between the soil body of frozen soil layer top and the bottom along with the increasing of frozen soil layer internal-external temperature difference has realized the autonomous type mediation, has better realized equal thermal effect.
Claims (3)
1. nanofluid heat pipe device that is used for the frozen soil soaking, it is characterized in that: comprise soaking heat pipe (1), moisture analyser (4), computing machine (5), humidistat (6), thermopair multiplex inspector (8), the soaking heat pipe is equipped with nano-fluid in (1), the evaporator section (2) of soaking heat pipe (1) inserts simulation frozen soil bottom, condensation segment (3) exposes the frozen soil top layer, the end of probe (9) of moisture analyser (4) is arranged in each representative region of frozen soil layer, the terminal of moisture analyser (4) is connected with computing machine (5), computing machine (5) is connected with humidistat (6), near the tube wall of simulation frozen soil layer representative region and soaking heat pipe (1), be furnished with the thermopair (7) of distribution gradient, thermopair (7) is connected with thermopair multiplex inspector (8), and thermopair multiplex inspector (8) is connected with computing machine (5).
2. the nanofluid heat pipe device for the frozen soil soaking according to claim 1 is characterized in that: described nano-fluid employing Fe
3O
4, described simulation frozen soil layer adopts cylindrical shape to arrange, and the sample periphery is adopted the aluminium foil parcel.
3. the nanofluid heat pipe device for the frozen soil soaking according to claim 1, it is characterized in that: described moisture analyser (4) employing JY2-PTS-1 type soil humidity sensor is measured the water cut in the frozen soil, and the end of probe (9) of described moisture analyser (4) is hygristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320045396 CN203249781U (en) | 2013-01-28 | 2013-01-28 | Nanofluid heat pipe device used for frozen soil soaking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320045396 CN203249781U (en) | 2013-01-28 | 2013-01-28 | Nanofluid heat pipe device used for frozen soil soaking |
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| Publication Number | Publication Date |
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| CN203249781U true CN203249781U (en) | 2013-10-23 |
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|---|---|---|---|
| CN 201320045396 Expired - Fee Related CN203249781U (en) | 2013-01-28 | 2013-01-28 | Nanofluid heat pipe device used for frozen soil soaking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076199A (en) * | 2013-01-28 | 2013-05-01 | 长沙理工大学 | Nanofluid heat pipe soaking device for low-temperature environment of frozen earth |
| CN107389727A (en) * | 2017-07-19 | 2017-11-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of Frozen Ground Area heat pipe floor data detection means based on temperature differential method |
-
2013
- 2013-01-28 CN CN 201320045396 patent/CN203249781U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076199A (en) * | 2013-01-28 | 2013-05-01 | 长沙理工大学 | Nanofluid heat pipe soaking device for low-temperature environment of frozen earth |
| CN107389727A (en) * | 2017-07-19 | 2017-11-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of Frozen Ground Area heat pipe floor data detection means based on temperature differential method |
| CN107389727B (en) * | 2017-07-19 | 2023-09-01 | 中国科学院西北生态环境资源研究院 | Frozen soil area heat pipe working condition data detection device based on temperature difference method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20140128 |