CN105651089A - Composite pulsating heat pipe - Google Patents
Composite pulsating heat pipe Download PDFInfo
- Publication number
- CN105651089A CN105651089A CN201610095876.8A CN201610095876A CN105651089A CN 105651089 A CN105651089 A CN 105651089A CN 201610095876 A CN201610095876 A CN 201610095876A CN 105651089 A CN105651089 A CN 105651089A
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- Prior art keywords
- heat pipe
- pulsating heat
- working medium
- pulsating
- layers
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- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
A composite pulsating heat pipe comprises three layers of pulsating heat pipe bodies. The layer of pulsating heat pipe body with ammonium hydroxide as the working medium is additionally arranged between the two layers of pulsating heat pipe bodies with acetone as the working medium. The composite pulsating heat pipe is divided into a condensation section, a heat insulating section and an evaporation section and is in a closed loop form. As the layer of pulsating heat pipe body with the ammonium hydroxide as the working medium is additionally arranged between the two layers of pulsating heat pipe bodies with the acetone as the working medium, the minimum starting temperature of the pulsating heat pipe is lowered, the maximum temperature value is increased, and the work temperature range is widened. According to the layer of pulsating heat pipe body with the ammonium hydroxide as the working medium in the middle, as the ammonium hydroxide is not stable and is chemically decomposed to form chemical energy change when the temperature is low, and the desorption-absorption physical process of ammonia gas has heat change as well, the performance of the pulsating heat pipe is improved, and the heat radiation performance of the other two layers of pulsating heat pipe bodies with the acetone as the working medium can be assisted.
Description
Technical field
The present invention relates to a kind of compound pulsating heat pipe, belong to the cooling and efficient heat transfer field of electronic device.
Background technology
Pulsating heat pipe (PHP), proposed the nineties in last century by Japanese scholars H.Akachi, the pulsation heat of prior artPipe is the simple but two phase flow Thermal Conduction Equipment of complicated mechanism of a kind of mechanism, and it is that a long capillary is vacuumized, and then willCapillary inside is filled with liquid, if capillary diameter is enough little, in pipe, will form off and on steam binding and liquid plug, when pulsation heatLiquid evaporation vaporization when one end of pipe is heated, steam flows to the other end and emits heat and condense into liquid under small pressure reduction. LittleCaliber and the bending repeatedly of cold and hot end are two primary conditions that form pulsating heat pipe, pulse to transmit heat by phase transformation and vapour-liquidAmount. Compared with general heat pipe, it is simple in structure, does not need liquid-sucking core, is not affected by gravity, and caliber is little, and heat pipe shape can be appointedMeaning is bending, and adaptability is good, and therefore manufacture, the low pulsating heat pipe of operation and maintenance cost, due to its good performance, are regarded as solvingIn short space high heat-flux heat sink conception, be hopeful the heat transfer element with future most.
Although the pulsating heat pipe of prior art has above-mentioned all advantages, the defect existing is: pulsating heat pipe is can onlyIn less temperature range, working, perhaps in higher temperature scope, is perhaps in lower temperature range, does not find so far effectRate is high, has the pulsating heat pipe of larger operating temperature range, and this just makes its ability to work limited, easily occur dryouting, or difficultWith the problem starting, make pulsating heat pipe also just be not activated electronic devices and components are burnt.
Summary of the invention
The present invention has proposed a kind of compound pulsating heat pipe for the problem of present technology existence. This pulsating heat pipeBy three layers of compound one that is placed in of pulsating heat pipe, by mutual different heat-transfer capability, and pulsation heat taking ammoniacal liquor as working mediumThe influencing each other of chemical reaction effect and desorb-absorption process in pipe, thus its operating temperature range expanded, strengthen entirety suitableShould be able to power, improve its ability to work, better protect electronic devices and components.
The technical scheme that the compound pulsating heat pipe the present invention relates to adopts is as follows:
Described compound pulsating heat pipe comprises three layers of pulsating heat pipe, between the two-layer pulsating heat pipe taking acetone as working medium, add one deck withAmmoniacal liquor is the pulsating heat pipe of working medium; Interact, working medium difference.
Described compound pulsating heat pipe is divided into condensation segment, adiabatic section and evaporator section, and this pulsating heat pipe is closed loop.
Described pulsating heat pipe is that snakelike etching forms on silicon plate, and the pulsating heat pipe that is then ammoniacal liquor by working medium is placed inBetween, the pulsating heat pipe that both sides are acetone in order to working medium is clamped, with the intact sealing of high-temp glue.
By the vacuum orifice of three layers of pulsating heat pipe, compound pulsating heat pipe is vacuumized respectively;
Finally by working medium inlet, three layers of pulsating heat pipe are injected respectively to above-mentioned corresponding working medium again, levels working medium is thirdKetone, intermediate layer working medium is ammoniacal liquor;
In pulsating heat pipe taking acetone as working medium, filling rate is 40%, and in the pulsating heat pipe taking ammoniacal liquor as working medium, filling rate is 50%.
Described pulsating heat pipe adopts equivalent diameter capillaceous to meet following formula:
In formula, g is acceleration of gravity, and d represents equivalent diameter, and ρ represents the density of filling liquid in pulsating heat pipe, and σ presentation surface is openedPower, subscript l, v represent respectively liquid and gas.
Ammonia spirit is in the migration of quality and the exchange of energy of the simultaneous ammonia of desorb and absorption. Ammonia is water-solubleAfter, the solution composition of formation is NH3H2O(mono-hydration ammonia), its chemical property is very unstable, easily after being heated againBe decomposed into ammonia and water. Meanwhile, ammonia is also accompanied by physics endothermic process in the process that is changed into gas phase by liquid phase.
Compare with ammoniacal liquor desorb, pure working medium is only accompanied by physics endothermic process in evaporation process, and heat of evaporation is gasChange latent heat. Therefore,, from the angle analysis of unit mass cold-producing medium working medium, the solution of ammonia spirit caloric receptivity is with respect to pure working mediumIt is high that gasification latent heat is wanted.
Beneficial effect of the present invention:
(1) owing to adding the pulsating heat pipe of one deck taking ammoniacal liquor as working medium between the two-layer pulsating heat pipe taking acetone as working medium, makePulsating heat pipe has reduced minimum start-up temperature, has increased maximum temperature values, and operating temperature range is expanded.
(2) pulsating heat pipe taking ammoniacal liquor as working medium in the middle of, because ammoniacal liquor is unstable, will when temperature is lowerThere is chemical breakdown and form chemical energy variation, and the physical process of the desorb-absorption of ammonia, also have the variation of heat, theseAll increase pulsating heat pipe performance, can assist the heat dispersion of other two-layer pulsating heat pipes taking acetone as working medium.
Brief description of the drawings
Fig. 1 is that upper strata working medium is the pulsating heat pipe schematic diagram of acetone; Fig. 2 is that working medium is the pulsating heat pipe of ammoniacal liquor;
Fig. 3 is that lower floor's working medium is the pulsating heat pipe schematic diagram of acetone;
Fig. 4 is compound pulsating heat pipe side view; Fig. 5 is the stereogram of compound pulsating heat pipe;
A, b, c wherein distinguish identical with a, b, c in Fig. 4;
Wherein a is Fig. 1 side view; B is Fig. 2 side view; C is Fig. 3 side view;
Wherein e1, e2, e3 are working medium inlet; D1, d2, d3 are vacuum orifice;
Wherein f is condensation segment, and g is adiabatic section, and h is evaporator section.
Detailed description of the invention
Structure of the present invention comprises: between the two-layer pulsating heat pipe taking acetone as working medium, add the pulsation of one deck taking ammoniacal liquor as working mediumHeat pipe two is managed adjacent, interacts, and working medium difference.
The moving heat pipe of this kind of composite vein is divided into again condensation segment, adiabatic section and evaporator section, and this pulsating heat pipe is closed loop.
Pulsating heat pipe of the present invention is that snakelike etching forms on silicon plate, and the pulsating heat pipe that is then ammoniacal liquor by working medium is placed inCentre, the pulsating heat pipe that both sides are acetone in order to working medium is clamped, with the intact sealing of high-temp glue.
By the vacuum orifice of three layers of pulsating heat pipe, vacuumized respectively.
Finally by working medium inlet, three layers of pulsating heat pipe are injected respectively to above-mentioned corresponding working medium again.
In pulsating heat pipe taking acetone as working medium, filling rate is 40%, in the pulsating heat pipe taking ammoniacal liquor as working medium filling rate as50%。
Described pulsating heat pipe adopts equivalent diameter capillaceous to meet following formula:
In formula, g is acceleration of gravity, and d represents equivalent diameter, and ρ represents the density of filling liquid in pulsating heat pipe, and σ presentation surface is openedPower, subscript l, v represent respectively liquid and gas.
Ammonia is very easily water-soluble, the ammonia of 1 volume water dissolvable 700 volumes under normal temperature and pressure. Why ammonia is soluble inWater be due to
(1) similar compatibility principle, NH3 and H2O polarity approach;
(2) between ammonia molecule and hydrone, can form hydrogen bond, greatly strengthen solvability;
(3) part ammonia reacts with water, has reduced NH3 concentration, and meltage is increased
Wherein the chemical equation of ammonia and water is: NH3+H2O=NH3H2O=(NH4) OH
The present invention is not in the time that electronic devices and components operating temperature reaches the start-up temperature of the pulsating heat pipe taking acetone as working medium, due to ammoniaThe unstability of water, starts desorption process, and chemical decomposition process, and its heat-absorbing action makes the present invention can be at a lower temperatureFor electronic devices and components are protected.
Electronic devices and components temperature further raises afterwards, impels the pulsating heat pipe work taking acetone as working medium, for it carries outCooling. When working medium is ammoniacal liquor, diabatic process has the phase-change heat transfer of desorb-absorption process and water, when ammonia overflows from waterCertain heat of evaporator section can be brought to condensation segment, this part ammonia is cooling at condensation segment, and ammonia is water-soluble again, flows back to evaporationSection, starts next round motion.
This pulsating heat pipe just having formed taking ammoniacal liquor as working medium is first started working, afterwards the pulsating heat pipe taking acetone as working mediumReaching start-up temperature is to start to start, and the startup of the pulsating heat pipe taking acetone as working medium cools as centre again, forms optimumCirculation, makes electronic devices and components in normal operating temperature.
Claims (1)
1. a compound pulsating heat pipe, is characterized in that: described compound pulsating heat pipe comprises three layers of pulsating heat pipe, taking acetone asBetween the two-layer pulsating heat pipe of working medium, add the pulsating heat pipe of one deck taking ammoniacal liquor as working medium;
Described compound pulsating heat pipe is divided into condensation segment, adiabatic section and evaporator section, and this pulsating heat pipe is closed loop;
Described pulsating heat pipe is that snakelike etching forms on silicon plate, in the middle of the pulsating heat pipe that is then ammoniacal liquor by working medium is placed in, and twoThe pulsating heat pipe that limit is acetone in order to working medium is clamped, with the intact sealing of high-temp glue;
By the vacuum orifice of three layers of pulsating heat pipe, compound pulsating heat pipe is vacuumized respectively;
Finally by working medium inlet, three layers of pulsating heat pipe are injected respectively to above-mentioned corresponding working medium again, levels working medium is thirdKetone, intermediate layer working medium is ammoniacal liquor;
In pulsating heat pipe taking acetone as working medium, filling rate is 40%, and in the pulsating heat pipe taking ammoniacal liquor as working medium, filling rate is 50%;
Described pulsating heat pipe adopts equivalent diameter capillaceous to meet following formula:
In formula, g is acceleration of gravity, and d represents equivalent diameter, and ρ represents the density of filling liquid in pulsating heat pipe, and σ presentation surface is openedPower, subscript l, v represent respectively liquid and gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095876.8A CN105651089B (en) | 2016-02-23 | 2016-02-23 | A kind of compound pulsating heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095876.8A CN105651089B (en) | 2016-02-23 | 2016-02-23 | A kind of compound pulsating heat pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105651089A true CN105651089A (en) | 2016-06-08 |
| CN105651089B CN105651089B (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610095876.8A Expired - Fee Related CN105651089B (en) | 2016-02-23 | 2016-02-23 | A kind of compound pulsating heat pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883799A (en) * | 2017-08-22 | 2018-04-06 | 南昌大学 | Module combined type pulsating heat pipe |
| CN112393633A (en) * | 2019-08-12 | 2021-02-23 | 青岛佰腾科技有限公司 | Loop heat pipe system with variable pipe diameter of heat release pipe group |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886801A (en) * | 2010-07-20 | 2010-11-17 | 上海交通大学 | Combined planar heat pipe radiator used for cooling light emitting diode (LED) |
| TWI387718B (en) * | 2009-11-09 | 2013-03-01 | Ind Tech Res Inst | Pulsating heat pipe |
| CN103925818A (en) * | 2014-05-05 | 2014-07-16 | 大连海事大学 | Staggered plate type pulsating heat pipe heat exchanger |
| CN104159437A (en) * | 2014-08-18 | 2014-11-19 | 上海理工大学 | Composite heat radiating device |
| US8919426B2 (en) * | 2007-10-22 | 2014-12-30 | The Peregrine Falcon Corporation | Micro-channel pulsating heat pipe |
-
2016
- 2016-02-23 CN CN201610095876.8A patent/CN105651089B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8919426B2 (en) * | 2007-10-22 | 2014-12-30 | The Peregrine Falcon Corporation | Micro-channel pulsating heat pipe |
| TWI387718B (en) * | 2009-11-09 | 2013-03-01 | Ind Tech Res Inst | Pulsating heat pipe |
| CN101886801A (en) * | 2010-07-20 | 2010-11-17 | 上海交通大学 | Combined planar heat pipe radiator used for cooling light emitting diode (LED) |
| CN103925818A (en) * | 2014-05-05 | 2014-07-16 | 大连海事大学 | Staggered plate type pulsating heat pipe heat exchanger |
| CN104159437A (en) * | 2014-08-18 | 2014-11-19 | 上海理工大学 | Composite heat radiating device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883799A (en) * | 2017-08-22 | 2018-04-06 | 南昌大学 | Module combined type pulsating heat pipe |
| CN112393633A (en) * | 2019-08-12 | 2021-02-23 | 青岛佰腾科技有限公司 | Loop heat pipe system with variable pipe diameter of heat release pipe group |
| CN112393633B (en) * | 2019-08-12 | 2022-01-28 | 中北大学 | Loop heat pipe system with variable pipe diameter of heat release pipe group |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105651089B (en) | 2017-06-30 |
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