CN101251348A - Axial round tube type silk net heat-tube using cupric oxide nano particle suspending liquid as working medium - Google Patents
Axial round tube type silk net heat-tube using cupric oxide nano particle suspending liquid as working medium Download PDFInfo
- Publication number
- CN101251348A CN101251348A CNA2008100355643A CN200810035564A CN101251348A CN 101251348 A CN101251348 A CN 101251348A CN A2008100355643 A CNA2008100355643 A CN A2008100355643A CN 200810035564 A CN200810035564 A CN 200810035564A CN 101251348 A CN101251348 A CN 101251348A
- Authority
- CN
- China
- Prior art keywords
- heat
- copper oxide
- section
- working medium
- nano particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to an axial circular pipe type screen heat pipe taking copper oxide nanoparticle suspension as working substance, which consists of an evaporation section, a thermal insulation section and a cooling section, wherein, the thermal insulation section is externally covered with a Teflon stick to make thermal insulation, the cooling section is externally welded with a cooling water jacket, the inner wall of the evaporation section is provided with a screen liquid-absorbing core structure, the working substance filled inside the screen liquid-absorbing core structure is copper oxide nanoparticle suspension, and the fluid filling rate is 40 to 60 percent of the volume of the evaporation section. The copper oxide nanoparticle suspension is the mixing liquid of de-ionized water and copper oxide nanoparticles, and the mass concentration of the copper oxide nanoparticles in the suspension is between 0.5 and 2 percent. During the use, the element which needs to make a heat radiation is pasted on the lower end of the heat pipe, the heat of the element which needs to make a heat radiation is transferred to the cooling section depend on the evaporation heat transfer of the working substance inside the grooved heat pipe, the working substance in the cooling section condenses the heat transfer to transfer the heat into condensed water. After the invention uses the water based copper oxide nanoparticle suspension as the working substance, the heat exchange performance is improved, and the total heat resistance of the heat pipe is decreased.
Description
Technical field
The present invention relates to a kind of is the axial round tube type silk net heat-tube of working medium with the cupric oxide nano particle suspending liquid, belongs to hot swapping and electronic devices and components cooling field.
Background technology
Tubular type silk screen heat pipe is a kind of high-performance heat transfer components, is widely used at current energy field and power electronics heat management field.Tubular type silk screen heat pipe structure is simple, makes easy to processly, and low production cost is realized industrialization easily.The phase-change heat-exchange of tubular type silk screen heat pipe by internal working medium realized the transmission of heat, and rate of heat transfer is fast, the efficient height, and thermal resistance is little, and silk screen can provide very strong capillary force, makes heat pipe that big operate power be arranged.
In the heat pipe cycle fluid, add each metalloid or metal oxide nanoparticles, can change the structure and the rerum natura of cycle fluid, strengthen the transmittance process of internal energy, the coefficient of heat transfer of increase nano-fluid, make the heter temperature field more even, heat exchange is more powerful.Therefore, nano-fluid (nanoparticle suspension) has wide application prospect as a kind of new enhanced heat-transfer working medium.
So far still nobody proposes to adopt cupric oxide nano particle suspending liquid to strengthen the heat pipe heat exchanging performance as the working medium in the tubular type silk screen heat pipe.Study a kind of heat pipe that uses cupric oxide nano particle suspending liquid as working medium, make it have unique development potentiality aspect electronic equipments such as electronics, microelectronic device cooling cooling field, the expanded application prospect has crucial meaning.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, it is the axial round tube type silk net heat-tube of working medium with the cupric oxide nano particle suspending liquid that design provides a kind of, improve heat exchange property, and production technology is simple, and equipment investment is few, realizes industrialization easily.
Be to realize this purpose, the present invention adopts a kind of novel heat exchange cooling working medium---and cupric oxide nano particle suspending liquid is as the working medium of axial round tube type silk net heat-tube, thereby reaches the purpose of strengthening tubular type silk screen heat pipe heat exchanging performance.Suspension has the effective thermal conductivity more much bigger than its base fluid, can improve the heat pipe heat exchanging characteristic effectively under the low pressure condition.
Silk screen heat pipe of the present invention adopts copper tube to process, and can be divided into three parts, evaporator section, adiabatic section and condensation segment, evaporator section adopt the electric heater heating, the insulation of adiabatic section overcoat teflon rod, condensation segment external welding cooling jacket washes away with cooling water and to cool off.The evaporator section inwall is provided with the silk screen liquid sucting core structure, and the inner working medium of injecting is cupric oxide nano particle suspending liquid, and best liquid filled ratio is the 40-60% of evaporator section volume, and in this scope, filling amount heat exchanging characteristic does not have influence substantially.Described cupric oxide nano particle suspending liquid is the mixed liquor of deionized water and copper oxide nanometer particle, and the mass concentration of copper oxide nanometer particle is 0.5-2.0% in the suspension.
When axial round tube type silk net heat-tube of the present invention moves, under the low heat loads operating mode, move several minutes earlier, the copper oxide nanometer particle that is deposited in the heat pipe evaporator section bottom is suspended again, can normally move.
During use, the components and parts of needs heat radiations are attached to the lower end of heat pipe, rely on the working medium evaporation heat transfer of tubular type silk screen inside heat pipe will need the heat of the element that dispels the heat to be delivered to cooling section, the working medium condensation heat transfer is delivered to heat in the condensed water in the cooling section.
The present invention utilizes cupric oxide nano particle suspending liquid to strengthen the adopting heat pipes for heat transfer characteristic, cupric oxide nano particle suspending liquid concentration has tangible influence to the heat transfer characteristic of axial round tube type silk net heat-tube, all can obtain strengthening effect in mass concentration is the scope of 0.5-2.0%.
Pressure has tangible influence to the heat exchange reinforcement rate of the axial round tube type silk net heat-tube of use cupric oxide nano particle suspending liquid.Pressure is more little, and the heat exchange strengthening effect behind the employing suspension is good more.This experimental verification scope is that 7.45kPa is to 19.97kPa.Enhanced type heat pipe of the present invention under low pressure (the heat pipe running temperature is lower than 80 degree) result of use is better.Pressure is by regulating condensate temperature control.
Among the present invention is the axial round tube type silk net heat-tube of working medium with the cupric oxide nano particle suspending liquid, with before be that the heat pipe of working medium is compared with the pure water, evaporator section coefficient of heat transfer maximum can improve 2.5 times, and maximum heat radiation power can improve 1.3 times.The entire thermal resistance of heat pipe can reduce half.
Description of drawings
Fig. 1 is an axial round tube type silk net heat-tube structural representation of the present invention.
Among Fig. 1,1 is condensation segment, and 2 is cooling jacket, and 3 is the adiabatic section, and 4 is the teflon rod, and 5 is working medium, and 6 are the heating thermal source, and 7 is evaporator section.
Fig. 2 is a silk screen heat pipe evaporator section inner wall section partial enlarged drawing.
The specific embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.Parameter in following examples does not constitute limitation of the invention.
The structure of axial round tube type silk net heat-tube of the present invention as shown in Figure 1, whole heat pipe adopts copper tube to process, copper tube external diameter 10mm, wall thickness 0.6mm, total length are 350mm, heading-length 100mm, adiabatic section length 100mm, condensation segment length 150mm.Heat pipe sizes can design arbitrarily.Adiabatic section 3 overcoat teflons rod, 4 insulations, evaporator section 7 adopts the electric heater heating, and evaporator section 7 inwalls are provided with the silk screen liquid sucting core structure, condensation segment external welding cooling jacket 2, wash away with cooling water and to cool off, cooling water enters from the water jacket bottom, and flow out on top, and 5 is the inner working medium cupric oxide nano particle suspending liquid that injects of evaporator section, best liquid filled ratio is the 40-60% of evaporator section volume, in this scope, filling amount heat exchanging characteristic does not have influence substantially, 6 thermals source for the electric heater generation.
The cupric oxide nano particle suspending liquid that the present invention adopts is the mixed liquor of deionized water and copper oxide nanometer particle, and the mass concentration scope of copper oxide nanometer particle is 0.5-2.0% in the suspension.Described copper oxide nanometer particle generally can use copper oxide nanometer particle arbitrarily, and the CuO nano particle of average grain diameter 50nm is used in suggestion.
Evaporator section inwall silk screen liquid sucting core structure of the present invention as shown in Figure 2, the silk screen of evenly arranging on evaporator section inwall heat-transfer area is generally got two-layer 160 orders, adopts the copper mesh of silk footpath 0.1mm.
When axial round tube type silk net heat-tube of the present invention moves, under the low heat loads operating mode, move several minutes earlier, the copper oxide nanometer particle that is deposited in the heat pipe evaporator section bottom is suspended again, can normally move.
During use, the components and parts of needs heat radiations are attached to the lower end of heat pipe, rely on the working medium evaporation heat transfer of tubular type silk screen inside heat pipe will need the heat of the element that dispels the heat to be delivered to cooling section, the working medium condensation heat transfer is delivered to heat in the condensed water in the cooling section.
It is that the data of embodiment of working medium are as shown in table 1 that the present invention adopts the cupric oxide nano particle suspending liquid of different quality concentration:
Table 1
| The copper oxide nanometer particle mass concentration | The heat pipe liquid filled ratio | Operating pressure (Pa) | Heat hot current density (kW/m 2) | Maximum heat exchange power increase rate | Coefficient of heat transfer increase rate |
| 0.5wt％ | 60％ | 7.45kPa | 20 | 16％ | 149％ |
| 1wt％ | 60％ | 7.45kPa | 20 | 28％ | 248％ |
| 2wt％ | 60％ | 7.45kPa | 20 | 15％ | 204％ |
| 2wt％ | 60％ | 12.38kPa | 20 | 16％ | 178％ |
| 2wt％ | 60％ | 19.97kPa | 20 | 18％ | 141％ |
Table 1 data show, axial round tube type silk net heat-tube of the present invention with existing be that the tubular type silk screen heat pipe of working medium is compared with the pure water, can very significant raising heat transfer characteristic, reduce the heat pipe thermal resistance, increase heat radiation power.Under same pressure, 1wt% is a best in quality concentration, can obtain maximum strengthening effect.Under the same concentration conditions, pressure is low more, and the strengthening effect that heat pipe played is obvious more.In pressure limit is between 7.45kPa～19.97kPa, when the copper oxide nanometer particle mass concentration is 1wt%, with traditional be that the heat pipe of working medium is compared with water, the evaporator section and the condensation segment coefficient of heat transfer on average can be enhanced about more than once, and maximum heat radiation power can be brought up to 1.3 times.The entire thermal resistance of heat pipe can reduce about half.
Claims (3)
1, a kind of is the axial round tube type silk net heat-tube of working medium with the cupric oxide nano particle suspending liquid, comprise evaporator section (7), adiabatic section (3) and condensation segment (1), it is characterized in that: adiabatic section (3) overcoat teflon rod (4) insulation, condensation segment (1) external welding cooling jacket, evaporator section (7) adopts the electric heater heating, evaporator section (7) inwall is provided with the silk screen liquid sucting core structure, and the inner working medium (5) that fills is cupric oxide nano particle suspending liquid, and liquid filled ratio is the 40-60% of evaporator section volume; Described cupric oxide nano particle suspending liquid is the mixed liquor of deionized water and copper oxide nanometer particle, and the mass concentration of copper oxide nanometer particle is 0.5-2.0% in the suspension.
2, according to claim 1 be the axial round tube type silk net heat-tube of working medium with the cupric oxide nano particle suspending liquid, it is characterized in that described copper oxide nanometer particle average grain diameter is 50nm.
3, according to claim 1 be the axial round tube type silk net heat-tube of working medium with the cupric oxide nano particle suspending liquid, it is characterized in that described silk screen liquid sucting core structure is two-layer 160 orders, adopt the copper mesh of silk footpath 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100355643A CN101251348A (en) | 2008-04-03 | 2008-04-03 | Axial round tube type silk net heat-tube using cupric oxide nano particle suspending liquid as working medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100355643A CN101251348A (en) | 2008-04-03 | 2008-04-03 | Axial round tube type silk net heat-tube using cupric oxide nano particle suspending liquid as working medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101251348A true CN101251348A (en) | 2008-08-27 |
Family
ID=39954861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100355643A Pending CN101251348A (en) | 2008-04-03 | 2008-04-03 | Axial round tube type silk net heat-tube using cupric oxide nano particle suspending liquid as working medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101251348A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359745A (en) * | 2011-07-06 | 2012-02-22 | 罗勰 | Moderate and low temperature mixed working medium thermal and electrical combined cycle based on brown cycle |
| CN102661670A (en) * | 2012-05-17 | 2012-09-12 | 程宝华 | Superconducting nano heat transfer plate type heat exchanger and manufacturing method thereof |
| CN109631632A (en) * | 2018-11-06 | 2019-04-16 | 浙江大学城市学院 | A kind of cooling device based on phase-change material and plane heat pipe |
| CN111998432A (en) * | 2020-09-10 | 2020-11-27 | 国核电力规划设计研究院有限公司 | Heat pipe type heat storage and supply device and method |
-
2008
- 2008-04-03 CN CNA2008100355643A patent/CN101251348A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359745A (en) * | 2011-07-06 | 2012-02-22 | 罗勰 | Moderate and low temperature mixed working medium thermal and electrical combined cycle based on brown cycle |
| CN102359745B (en) * | 2011-07-06 | 2015-10-07 | 罗勰 | With the turbine electricity generation system in injection pressurization cycle loop |
| CN102661670A (en) * | 2012-05-17 | 2012-09-12 | 程宝华 | Superconducting nano heat transfer plate type heat exchanger and manufacturing method thereof |
| WO2013170583A1 (en) * | 2012-05-17 | 2013-11-21 | Cheng Yu | Superconductive nano heat transfer plate type heat exchanger and manufacturing method thereof |
| US20150292808A1 (en) * | 2012-05-17 | 2015-10-15 | Yu Cheng | Superconductive nano heat transfer plate type heat exchanger and manufacturing method thereof |
| US10514207B2 (en) | 2012-05-17 | 2019-12-24 | Yu Cheng | Superconductive nano heat transfer plate type heat exchanger and manufacturing method thereof |
| CN109631632A (en) * | 2018-11-06 | 2019-04-16 | 浙江大学城市学院 | A kind of cooling device based on phase-change material and plane heat pipe |
| CN109631632B (en) * | 2018-11-06 | 2023-12-12 | 浙江大学城市学院 | Cooling device based on phase change material and planar heat pipe |
| CN111998432A (en) * | 2020-09-10 | 2020-11-27 | 国核电力规划设计研究院有限公司 | Heat pipe type heat storage and supply device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lu et al. | Thermal performance of an open thermosyphon using nanofluids for high-temperature evacuated tubular solar collectors: Part 1: Indoor experiment | |
| CN101818999B (en) | Pulsating heat pipe heat-transfer device for low grade heat energy utilization | |
| CN203163564U (en) | Loop gravity assisted heat pipe heat transfer device provided with flat plate type evaporator | |
| CN105960147A (en) | Spiral fractal based integrated micro flat plate heat pipe | |
| CN101839656A (en) | Sleeve-type efficient foam metal heat exchanger | |
| CN101251348A (en) | Axial round tube type silk net heat-tube using cupric oxide nano particle suspending liquid as working medium | |
| CN201392115Y (en) | Double-pipe high-efficiency foam metal heat exchanger | |
| CN201983669U (en) | Loop thermosyphon heat pipe heat conducting apparatus | |
| CN101078600A (en) | Two-phase closed type hot siphon tube using water-based carbon nanotube suspension liquid as working fluid | |
| CN201715903U (en) | Flat pulsating heat pipe heat transfer device | |
| CN103776288A (en) | Pulsating heat pipe | |
| CN114593630A (en) | Nano magnetic particle hydrophilic and hydrophobic intelligent tube and control system thereof | |
| CN201306961Y (en) | Cascaded heat pipe | |
| CN105277026A (en) | Self-wetting fluid oscillatory flow heat pipe | |
| CN206095017U (en) | Pitch gradual change fin formula spiral coil heat accumulator | |
| CN205718575U (en) | A kind of cold-heat-exchanging exchange system | |
| CN201832673U (en) | Water or oil bath with built-in hollow spiral tube for cooling | |
| CN205156702U (en) | Electrodeless heat pipe exchanger structure of modified phase transition | |
| CN101082468A (en) | Gravity force type micro-chute flat-plate hot pipe with carbon nano-tube suspending liquid as working substance | |
| CN201803532U (en) | Case and sleeve combined type film thinning condenser | |
| CN201429577Y (en) | Magnetic nanometer fluid vacuum heat pipe heat exchange device | |
| CN105222628A (en) | Pulsating heat pipe | |
| CN101251349A (en) | Axial microflute path heat-tube using water-based cupric oxide nano suspending liquid as working medium | |
| CN101231148A (en) | Round tube type micro-mortise heat tube using carbon nano-tube suspending liquid as working medium | |
| CN201397065Y (en) | Tubular heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080827 |