CN201680746U - Novel open gravity assisted heat pipe - Google Patents
Novel open gravity assisted heat pipe Download PDFInfo
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- CN201680746U CN201680746U CN200920295463XU CN200920295463U CN201680746U CN 201680746 U CN201680746 U CN 201680746U CN 200920295463X U CN200920295463X U CN 200920295463XU CN 200920295463 U CN200920295463 U CN 200920295463U CN 201680746 U CN201680746 U CN 201680746U
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- heat pipe
- heat
- section
- gravity assisted
- cooling section
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Abstract
The utility model relates to a novel open gravity assisted heat pipe, comprising a heat pipe body. The heat pipe body is a cooling segment, a heat insulation segment and a heating segment in sequence from top to bottom. The lower end of the heating segment is closed, and the upper end of the cooling segment is an upper baffle plate. The upper baffle plate is provided with a small hole, and the upper end of the cooling segment is surrounded with a water seal. In the heat pipe, when phase change heat transfer is provided, foul gas generated due to high temperature is smoothly exhausted out from the heat pipe body by the small hole of the top part of the cooling segment, and the inner structure is communicated with the outside by the small hole, so the working pressure is stabilized to the system working pressure, and the operation is safe and reliable. The novel open gravity assisted heat pipe has the advantages of high heat transfer capability, simple structure, convenient processing, low cost and safe and reliable performance.
Description
(1) technical field
The utility model relates to a kind of gravity assisted heat pipe.
(2) background technology
Common gravity assisted heat pipe device comprises the heat pipe body, the heat pipe body by last under be followed successively by cooling section, adiabatic section and bringing-up section, gravity assisted heat pipe is when work, working medium is in bringing-up section heat absorption vaporization, rise in the cooling section through the adiabatic section, steam condensateization in cooling section, liquid refrigerant is back to bringing-up section through the adiabatic section under the gravity effect, and working medium spreads out of to top by the heat transportation of continuous circulation with the bottom.
Because the architectural feature of traditional gravity assisted heat pipe device is sealed, vacuumize, its heat-transfer capability especially also can be affected because of produce incoagulable gas in running under higher operating mode except the influence that is subjected to heat transport limitation (mainly containing the dry limit, the boiling limit and entrainment limit).The incoagulable gas that produces in the running will be flooded with the space at cooling section top, reduce the heat transfer area of gravity assisted heat pipe, and then have influence on the heat-transfer capability of gravity assisted heat pipe, will cause tube wall temperature to raise, and will burn heat pipe when serious.
(3) summary of the invention
Be subjected to produce incoagulable gas under the higher operating mode and influence the heat-transfer capability deficiency in order to overcome existing gravity assisted heat pipe, the utility model provides a kind of open type gravity assisted heat pipe incoagulable gas, safe and reliable to operation of discharging.
The technical scheme in the invention for solving the technical problem is: a kind of new open type gravity assisted heat pipe, comprise the heat pipe body, described heat pipe body by last under be followed successively by cooling section, adiabatic section and bringing-up section, the lower end closed of described bringing-up section, the upper end of described cooling section is an overhead gage, also be provided with aperture on the described overhead gage, the upper end of described cooling section is arranged with water seal.
Further, the madial wall of described heat pipe body is provided with internal thread.
Preferably, the helical angle of described internal thread is 10 °～30 °.Preferably, the diameter of described aperture is 0.2～3mm.
There are two turning points in the course of work of the present utility model: first turning point, when the heat flow of open type gravity assisted heat pipe hour, the quantity of steam that bringing-up section produces is less, the cooling section of heat pipe does not all participate in phase-change heat-exchange, between steam top to cooling section top, there is one section water column, the length of this water column reduces with the increase of heat flow, and the effect of this section water column on steam plume top is equivalent to the extension of water seal layer.When heat flow increased to a certain numerical value, water column just disappeared, and steam plume just all is full of cooling section.This moment, corresponding operating mode was first turning point of open type gravity assisted heat pipe.First turning point is the key factor that influences open-type heat pipe cooling section heat-transfer capability.Second turning point, continuation raising along with heat flow, the duty of open-type heat pipe has surpassed first turning point, the cooling section total length participates in phase-change heat-exchange still can not make steam all be condensed into liquid, have steam bubble to emerge this moment in the aperture at heat pipe top, and the steam bubble water that is cooled is condensed into liquid in the direct contact type mode of condensing, and the quantity of steam of emerging in the aperture increases along with the increase of heat flow, the open type gravity assisted heat pipe reaches preferable duty, and its heat transfer property surpasses the enclosed gravity assisted heat pipe.When heat flow density increases to the boiling heat transfer limit of bringing-up section, the phegma of heat pipe begins to satisfy the requirement of the required working medium amount of bringing-up section, the heat transfer of inside heat pipe is worsened, and the Heat Transfer of Heat Pipe on Heat Pipe ability begins to descend, and this moment, corresponding state point was second turning point of open type gravity assisted heat pipe.Second turning point is the key factor that influences open-type heat pipe bringing-up section heat-transfer capability.The utility model is more suitable for moving under higher operating mode.
When the heat flow of open type gravity assisted heat pipe hour, the quantity of steam that bringing-up section produces is less, the cooling section of heat pipe does not all participate in phase-change heat-exchange, between steam top to cooling section top, there is one section water column, the length of this water column reduces with the increase of heat flow, and the effect of this section water column on steam plume top is equivalent to the extension of water seal layer.When heat flow increased to a certain numerical value, water column just disappeared, and steam plume just all is full of cooling section.This moment, corresponding operating mode was first turning point of open type gravity assisted heat pipe.Continuation raising along with heat flow, the duty of open-type heat pipe surpasses first turning point, the cooling section total length participates in phase-change heat-exchange still can not make steam all be condensed into liquid, have steam bubble to emerge this moment in the aperture at heat pipe top, the steam bubble water that is cooled in water seal layer and cooling jacket is condensed into liquid by the direct contact type mode of condensing, the quantity of steam of emerging in the aperture increases along with the increase of heat flow, and open-type heat pipe reaches preferable duty.When heat flow density increased to the boiling heat transfer limit of bringing-up section, the phegma of heat pipe began to satisfy the requirement of the required working medium amount of bringing-up section, and the heat transfer of inside heat pipe is worsened, and the Heat Transfer of Heat Pipe on Heat Pipe ability begins to descend.
The beneficial effects of the utility model are: in heat pipe, when phase-change heat transfer is provided, the incoagulable gas that Yin Gaowen is produced is discharged the heat pipe body smoothly by the aperture at cooling section top, its internal structure makes its operating pressure be stabilized in system works pressure by aperture and extraneous UNICOM, makes safe and reliable to operation.Higher heat-transfer capability is not only arranged, and simple in structure, easy to process, with low cost, and performance is safe and reliable.In addition, the madial wall of heat pipe body is provided with internal thread, has increased heat transfer area, has strengthened the heat-transfer capability of cooling section and bringing-up section.
(4) description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is steam working condition chart of the present utility model when not forming the steady flow district as yet.
Fig. 3 is a working condition chart of the present utility model when beginning to form stable steam flow region.
Fig. 4 is quantity of steam working condition chart of the present utility model when just being full of cooling section fully.
(5) specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of new open type gravity assisted heat pipe, comprise the heat pipe body, described heat pipe body by last under be followed successively by cooling section 1, adiabatic section 2 and bringing-up section 3, the lower end closed of described bringing-up section 3, the upper end of described cooling section 1 is an overhead gage, also is provided with aperture 4 on the described overhead gage, and the upper end of described cooling section 1 is arranged with water seal 5.In the present embodiment, the madial wall of described heat pipe body is provided with internal thread, and internal thread can increase heat transfer area, has strengthened the heat-transfer capability of cooling section and bringing-up section.The helical angle of internal thread is preferably 10 °～30 °, and it is best to conduct heat.The diameter of aperture is preferably 0.2～3mm, not only can reach the purpose of the utility model but also do not influence duty.
In heat flow density hour, the steam of generation seldom is condensed in cooling section very soon, steam does not form the steady flow district, and discontinuous condensation heat takes place, and makes the wall temperature of cooling section lower end present fluctuation status, this moment think that the condensation segment length of open-type heat pipe is very little, as shown in Figure 2 shown in.Raising along with heat flow density, the quantity of steam that bringing-up section produces increases, begin to form stable steam flow region, steam can be at heat pipe cooling section wall condensation heat constantly, cooling section lower end temperature tends towards stability gradually, as shown in Figure 3, Lc is the real condensation length of steam at the cooling section wall.As can be seen from Figure: this moment is because the quantity of steam that produces is limited, and the whole cooling section of underfill, still has one section fluid column in the cooling section upper end, so the Lc of this moment also is not equal to the actual cooling section length l c of open type gravity assisted heat pipe, i.e. Lc/lc＜1.When heat flow density continuation increase, when the quantity of steam that bringing-up section produces just is full of cooling section fully, Lc/lc=1, as shown in Figure 4.Continue heating, will have bubble and overflow from the top aperture, the direct contact type mode of condensing participates in conducting heat.
Claims (4)
1. new open type gravity assisted heat pipe, comprise the heat pipe body, described heat pipe body by last under be followed successively by cooling section, adiabatic section and bringing-up section, the lower end closed of described bringing-up section, it is characterized in that: the upper end of described cooling section is an overhead gage, also be provided with aperture on the described overhead gage, the upper end of described cooling section is arranged with water seal.
2. new open type gravity assisted heat pipe as claimed in claim 1 is characterized in that: the madial wall of described heat pipe body is provided with internal thread.
3. new open type gravity assisted heat pipe as claimed in claim 2 is characterized in that: the helical angle of described internal thread is 10 °～30 °.
4. as the described new open type gravity assisted heat pipe of one of claim 1～3, it is characterized in that: the diameter of described aperture is 0.2～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920295463XU CN201680746U (en) | 2009-12-31 | 2009-12-31 | Novel open gravity assisted heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920295463XU CN201680746U (en) | 2009-12-31 | 2009-12-31 | Novel open gravity assisted heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201680746U true CN201680746U (en) | 2010-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920295463XU Expired - Fee Related CN201680746U (en) | 2009-12-31 | 2009-12-31 | Novel open gravity assisted heat pipe |
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| Country | Link |
|---|---|
| CN (1) | CN201680746U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015954A (en) * | 2012-12-03 | 2013-04-03 | 中国石油天然气股份有限公司 | Producing well shaft combined gravity assisted heat pipe |
-
2009
- 2009-12-31 CN CN200920295463XU patent/CN201680746U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015954A (en) * | 2012-12-03 | 2013-04-03 | 中国石油天然气股份有限公司 | Producing well shaft combined gravity assisted heat pipe |
| CN103015954B (en) * | 2012-12-03 | 2015-07-08 | 中国石油天然气股份有限公司 | Producing well shaft combined gravity assisted heat pipe |
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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: 20101222 Termination date: 20131231 |