CN1332170C - Heat transfer process for pulse heating intensive selfoscillatory flow heat pipe - Google Patents
Heat transfer process for pulse heating intensive selfoscillatory flow heat pipe Download PDFInfo
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- CN1332170C CN1332170C CNB2005100019780A CN200510001978A CN1332170C CN 1332170 C CN1332170 C CN 1332170C CN B2005100019780 A CNB2005100019780 A CN B2005100019780A CN 200510001978 A CN200510001978 A CN 200510001978A CN 1332170 C CN1332170 C CN 1332170C
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- heating
- heat pipe
- pulse
- heat
- flow heat
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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
- F28D15/0266—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 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
Abstract
The present invention provides a heat transfer method for a pulse heating reinforcing self-excitation oscillation flow heat pipe. Pulse heating or stepwise pulse heating is adopted to substitute for the conventional continuous heating of a heat source. The method specifically comprises: an object needing to be heated by a self-excitation oscillation flow heat pipe is placed at the condensation segment (1) of the self-excitation oscillation flow heat pipe in the pulse heating, and the heating segment (2) of the self-excitation oscillation flow heat pipe is connected with a heating heat source. A pulse heat source whose heat flow density is from 1 to 30 MW/m<2> and pulse width is from 100 to 3000 ms is adopted to heat a pulse heating position (3). the object needing to be heated by the self-excitation oscillation flow heat pipe is placed at the condensation segment (1) of the self-excitation oscillation flow heat pipe in the stepwise pulse heating, the heating segment (2) of the self-excitation oscillation flow heat pipe is connected with the heating heat source, and the stepwise pulse heating is carried out in a stepwise pulse heating position (4). The present invention has the advantages of high heat transfer efficiency, simple process, easy operation and wide application range.
Description
Technical field
The invention belongs to technical field of heat exchange, particularly provide a kind of PULSE HEATING to strengthen the method that selfexcited oscillating-flow heat pipe (claiming pulsating heat pipe again) conducts heat.
Background technology
1994, Japan scholar H.Akachi has invented a kind of pulsating heat pipe (Pulsating Heat Pipe) of novel concept, also there are some scholars to claim that this new heat pipe is an oscillating heat pipe, the luxuriant culture and education of western tail of Japan is awarded then suggestion and is referred to as selfexcited oscillating-flow heat pipe (Self-Exciting Mode Oscillating-Flow Heat Pipe is called for short SEMOS Heat Pipe).
Selfexcited oscillating-flow heat pipe is by the long bending snakelike pipeline of capillary, is made up of some thin straight pipelines and some elbows, is divided into bringing-up section, condensation segment and isolation section three parts.By the difference of its circulatory system, can be divided into loop type (Looped) and the disjunct non-loop type of head and the tail (Unlooped) two kinds that head and the tail are linked to be the closed-loop path again.Its operation principle such as Fig. 1 show: when enough hour of caliber, under vacuum, be encapsulated in hydraulic fluid in the pipe will be in pipe the plunger between formation liquid, vapour phase.In bringing-up section, the liquid film between steam bubble or vapour post and the tube wall causes steam bubble to expand because of the constantly evaporation of being heated, and promotes the vapour-liquid plug flow to cold junction condensation contraction, thereby forms bigger pressure reduction between cool and heat ends.Because the vapour-liquid plunger is interspersed, thereby the strong reciprocating vibration motion of generation in pipe, thereby realize high efficiencies of heat transfer (H.Akachi (barren land): Looped CapillaryTube Heat Pipe, Proceedings of 71th General Meeting Conference of JSME, Vol.3, No.940-10,1994.)
The frequency of oscillation of selfexcited oscillating-flow heat pipe is higher than the vapour-liquid cycle frequency in the conventional heat pipe far away, and the Convective Heat Transfer between its working media and the tube wall is also strengthened greatly because of the effect that is subjected to violent pulsation stream.According to the literature, internal diameter is 0.5mm, is the selfexcited oscillating-flow heat pipe of working medium with R141b, and the transmission heat of its unit are has reached 1000W/cm
2, be equivalent to 20 times of the high capacity of heat transfer of conventional heat pipe.In addition, this new heat pipe does not need capillary wick, has simple in structure, low cost and other advantages than conventional heat pipe, and also because of its caliber is little, volume is little in addition, is easy to realize microminiaturized.Along with development of science and technology, electronic device is progressively to miniaturization, microminiaturized development, volume is more and more littler, integrated level is more and more higher, power is increasing, this just presses for novel heat transfer element small-sized, strong heat-sinking capability, so selfexcited oscillating-flow heat pipe has broad application prospects at aspects such as electronics, microelectronics coolings.
Selfexcited oscillating-flow heat pipe has had many scholars both at home and abroad it is studied since being born, just up to now, the research of people's opposite heat tube mainly concentrates on the working mechanism of announcement selfexcited oscillating-flow heat pipe and the influence of operational factor opposite heat tube service behaviour, and also the someone proposes to strengthen by the method that changes mode of heating the heat transmission of selfexcited oscillating-flow heat pipe.
Summary of the invention
The object of the present invention is to provide a kind of PULSE HEATING to strengthen the method that selfexcited oscillating-flow heat pipe conducts heat, replace the conventional mode of heating continuously to strengthen the heat transfer of selfexcited oscillating-flow heat pipe by adopting PULSE HEATING.
The present invention is with adopting the heating of PULSE HEATING or step by-step impulse to replace the heating of conventional thermal source continuously.
Concrete grammar is:
PULSE HEATING is that the bringing-up section 2 of selfexcited oscillating-flow heat pipe connects the heating thermal source the condensation segment 1 that need place selfexcited oscillating-flow heat pipe with the object of selfexcited oscillating-flow heat pipe heating, and adopting heat flow density at 3 places, PULSE HEATING position is 1～30MW/m
2, pulse width is that the pulse heat source of 100～3000ms heats.Heat pipe condenser section 1 can directly be attached to be needed on the heated object or is positioned over to add hot fluid in the casing, can realize this PULSE HEATING mode with pulse laser heater or Pulse Electric heater.
The step by-step impulse heating is the condensation segment 1 that need place selfexcited oscillating-flow heat pipe with the object of selfexcited oscillating-flow heat pipe heating, the bringing-up section 2 of selfexcited oscillating-flow heat pipe connects the heating thermal source (for some equipment that need dispel the heat or electronic component, can directly be attached to the heat pipe bringing-up section on the equipment or element that needs heat radiation), impose on the step by-step impulse heating at step by-step impulse heating location 4 places.For this situation of thermic load as the Continuous Heat source, can adopt the auxiliary heating of step by-step impulse, obtain bigger heat-transfer effect with a small amount of external energy.
The mode of step by-step impulse heating can adopt pulse laser heater or Pulse Electric heater to realize.
From the operation principle of selfexcited oscillating-flow heat pipe as can be seen, strengthening selfexcited oscillating-flow heat pipe has two Basic Ways: the one, and the heat transfer in the enhanced tube between vapour-liquid medium and the tube wall; The one, improve the circulation power of its frequency of oscillation and operation.These two kinds of approach be mutually promote, complementary.
Adopt the PULSE HEATING mode to replace the conventional heating can the enhancing of thermal source continuously intraductal working medium pulsation mechanism, improve the frequency of oscillation of selfexcited oscillating-flow heat pipe tube fluid and the circulation power of operation, reach the effect of augmentation of heat transfer.
Selfexcited oscillating-flow heat pipe adopts copper pipe or other materials to make, and is filled with hydraulic fluid in the pipe, and hydraulic fluid can be liquid such as water, alcohol or R142b.At heat pipe bringing-up section input heat, working medium forms reciprocating vibration and moves in pipe, the object that need heat heat transferred at condensation segment.
The invention has the advantages that the heat transfer efficiency height, technology is simple, easy operating, applied range.
Description of drawings
Fig. 1 is the selfexcited oscillating-flow heat pipe schematic diagram.
Fig. 2 is a PULSE HEATING selfexcited oscillating-flow heat pipe schematic diagram of the present invention, wherein, and condensation segment 1, bringing-up section 2, PULSE HEATING position 3.
Fig. 3 is step by-step impulse heating selfexcited oscillating-flow heat pipe schematic diagram of the present invention, condensation segment 1, bringing-up section 2, step by-step impulse heating location 4.
The specific embodiment
Shown in Fig. 2,3, need the object of heat pipe heating to place the selfexcited oscillating-flow heat pipe condensation end, adopt the PULSE HEATING mode to replace conventional continuous thermal source heating at the fire end of selfexcited oscillating-flow heat pipe, reach the purpose of strengthening adopting heat pipes for heat transfer.
Claims (3)
1, a kind of PULSE HEATING is strengthened the method that selfexcited oscillating-flow heat pipe conducts heat, it is characterized in that: adopt pulse heat source to replace the heating of conventional thermal source continuously, placing heat pipe condenser section (1) with the object of selfexcited oscillating-flow heat pipe heating, heat pipe condenser section (1) directly is attached to be needed on the heated object or is positioned over to add hot fluid in the casing, heat pipe bringing-up section (2) connects the heating thermal source, and the heating thermal source is 1～30MW/m for locating to apply heat flow density in PULSE HEATING position (3)
2, pulse width is the pulse heat source of 100～3000ms; Realize the PULSE HEATING mode with pulse laser heater or Pulse Electric heater.
2, in accordance with the method for claim 1, it is characterized in that: above-mentioned pulse is a step by-step impulse, is applied to step by-step impulse heating location (4) and locates.
3, in accordance with the method for claim 2, it is characterized in that: for some equipment that need dispel the heat or electronic component, the heat pipe bringing-up section directly is attached on the equipment or element that needs heat radiation, adopts the auxiliary heating of step by-step impulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100019780A CN1332170C (en) | 2005-01-17 | 2005-01-17 | Heat transfer process for pulse heating intensive selfoscillatory flow heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100019780A CN1332170C (en) | 2005-01-17 | 2005-01-17 | Heat transfer process for pulse heating intensive selfoscillatory flow heat pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632442A CN1632442A (en) | 2005-06-29 |
| CN1332170C true CN1332170C (en) | 2007-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100019780A Expired - Fee Related CN1332170C (en) | 2005-01-17 | 2005-01-17 | Heat transfer process for pulse heating intensive selfoscillatory flow heat pipe |
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| Country | Link |
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| CN (1) | CN1332170C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100513970C (en) * | 2006-08-23 | 2009-07-15 | 富准精密工业(深圳)有限公司 | Pulsation type heat pipe |
| CN108617158A (en) * | 2018-06-11 | 2018-10-02 | Oppo广东移动通信有限公司 | A kind of radiating subassembly and electronic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063842C (en) * | 1992-05-21 | 2001-03-28 | 埃克托罗尼克斯株式会社 | Structure of micro-heat pipe |
| JP2002295984A (en) * | 2001-03-29 | 2002-10-09 | National Institute Of Advanced Industrial & Technology | Heater for heat pipe for high temperature |
| JP2003106262A (en) * | 2001-09-28 | 2003-04-09 | Hitachi Hybrid Network Co Ltd | Feeding and discharging device |
| WO2003087695A1 (en) * | 2002-04-16 | 2003-10-23 | Yoshiro Miyazaki | Self-excited vibration heat pipe and computer with the heat pipe |
-
2005
- 2005-01-17 CN CNB2005100019780A patent/CN1332170C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063842C (en) * | 1992-05-21 | 2001-03-28 | 埃克托罗尼克斯株式会社 | Structure of micro-heat pipe |
| JP2002295984A (en) * | 2001-03-29 | 2002-10-09 | National Institute Of Advanced Industrial & Technology | Heater for heat pipe for high temperature |
| JP2003106262A (en) * | 2001-09-28 | 2003-04-09 | Hitachi Hybrid Network Co Ltd | Feeding and discharging device |
| WO2003087695A1 (en) * | 2002-04-16 | 2003-10-23 | Yoshiro Miyazaki | Self-excited vibration heat pipe and computer with the heat pipe |
Non-Patent Citations (3)
| Title |
|---|
| Closed loop pulsating heat pipes Part B:visualization and semi-empirical modeling Sameer Khandekar,ect,Applied Thermal Engineering 23 2003 * |
| Closed loop pulsating heat pipes Part B:visualization and semi-empirical modeling Sameer Khandekar,ect,Applied Thermal Engineering 23 2003;振荡热管－一种新型独特的传热元件 马永锡等，化工进展，第23卷第9期 2004 * |
| 振荡热管－一种新型独特的传热元件 马永锡等，化工进展，第23卷第9期 2004 * |
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| Publication number | Publication date |
|---|---|
| CN1632442A (en) | 2005-06-29 |
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Granted publication date: 20070815 Termination date: 20110117 |