CN1151013A - Crescent moon shaped channel condensing evaporator - Google Patents
Crescent moon shaped channel condensing evaporator Download PDFInfo
- Publication number
- CN1151013A CN1151013A CN 96118732 CN96118732A CN1151013A CN 1151013 A CN1151013 A CN 1151013A CN 96118732 CN96118732 CN 96118732 CN 96118732 A CN96118732 A CN 96118732A CN 1151013 A CN1151013 A CN 1151013A
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- shaped channel
- evaporator
- crescent moon
- moon shaped
- pipe
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A condensing evaporator with crescent-shaped channels has a high-pressure container, which contains a cluster of eccentric tubes including internal and external tubes to form crescent-shaped channel. The liquid supplementing troughs are made on wall of internal tubes. Its advantages include high heat conductivity increased by 6 times, small heat-transfer temp. difference decreased by 0.6-0.8K, small size, light weight, low energy consumption, and high safety and reliability.
Description
The present invention relates to a kind of condenser/evaporator, particularly a kind of crescent moon shaped channel condensing evaporator.
The light pipe formula condenser/evaporator that tradition adopts in the empty branch trade is compared with emerging plate-fin condenser/evaporator afterwards, on overall heat exchange property, to be inferior very much really, therefore, generally adopt board-like condenser/evaporator in the large and medium-sized air separation unit at home and abroad.Yet many countries researched and developed sintered porous surface pipe in succession in these several years, and boiling heat transfer coefficient is greatly improved.Thereby the tubular type condenser/evaporator still is widely used in medium and small air separation unit at present.But because sintered porous surface pipe processing technology complexity, the manufacturing cost height, comes off at the easy passivation of porous surface, more easily loses heat conduction reinforced effect, but also fluid is polluted, and easily blocking pipeline cleans very difficult.The defective that these are serious all makes it be very restricted in industrial applying.
Purpose of the present invention is intended to overcome the shortcoming of above-mentioned prior art, develop a kind of mososeries tubular type condenser/evaporator according to the heat conduction reinforced mechanism of mocromembrane thermal siphon two phase flow, has high heat transfer coefficient, little heat transfer temperature difference, volume is little, in light weight, energy consumption is low, and is simple in structure, and processing and fabricating is convenient, characteristics such as safe and reliable to operation, compare with existing light pipe formula condenser/evaporator, its coefficient of heat transfer has improved more than 6 times, and heat transfer temperature difference has reduced 0.6～0.8K, can realize the ultralow pressure flow process of middle or small air separation unit, reduce energy resource consumption greatly.
Fig. 1 is structure master's sectional schematic of the present invention.
Fig. 2 is the structure of the present invention sectional schematic of bowing.
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are elaborated.
The present invention includes some limit off-centre operation pipe mososeries passage tube banks (3) of forming by interior pipe (1) and outer tube (2), tube bank (3) is placed in the high pressure chest (11) at container middle part, difference according to the condensation heat payload, the length of crescent moon shaped channel tube bank is 600～1500mm, on inner pipe wall, have the fluid infusion sulculus (10) of different spacing, be used for top fluid infusion to the mososeries evaporation channel, avoid dryouting phenomenon, guarantee that condenser/evaporator is efficient, safe operation.The two ends of tube bank are fixing by fixed head (4) and (5) respectively, high pressure nitrogen GN
2Air inlet (9) by container top enters in the high-pressure bottle (8), in mososeries pipe condensed exterior, and condensed liquid nitrogen LN
2Flowed out by liquid outlet (12), liquid oxygen absorbs nitrogen condensation time institute liberated heat outside the pipe by in inlet (6) person who lives in exile's high pressure chest (8) in the limit off-centre operation pipe crescent moon shaped channel that inner and outer pipe is formed, flash to oxygen GO
2, discharge by oxygen bleed line (7).In addition, among the figure, (13) are bracing frame.
Operation principle of the present invention is referring to Fig. 2, discover according to mocromembrane thermal siphon two phase flow boiling heat transfer mechanism experiment: the main thermal resistance of boiling heat transfer is in the boiling side, and the size of boiling side thermal resistance depends primarily on the bubble thickness of liquid film at the end, and the thickness of liquid film of managing to reduce to steep the end can reach the purpose of enhanced boiling heat transfer.Become flat steam bubble owing to steam bubble is squeezed repeatedly in crescent moon shaped channel, make the bubble thinning of liquid film at the end, thereby heat transfer resistance is reduced, improved heat transfer coefficient greatly, and reduced heat transfer temperature difference.Simultaneously, because the crescent moon shaped channel (3) that interior pipe (1) and outer tube (2) are constituted, its cross section sharp corner forms the artificial nucleus of boiling, and the fast formation, the multiform that help steam bubble become, thereby more aggravated the boiling of liquid film in crescent moon shaped channel (3).In addition, utilize the thermal siphon driving force of crescent moon shaped channel (3) density contrast that inside and outside fluid produced, fluid is upwards flowed with the high speed fountain in crescent moon shaped channel (3), make the liquid explosive vaporization as fluid.Like this, neither can make the fluid in the passage produce any pollution and blocking pipe (because the present invention is without any pollution sources), and, the consumption of the driving force when fluid flows also saved.The present invention has the distinct advantages that high heat transfer coefficient, little heat transfer temperature difference possess simultaneously, is that air separation unit is realized the ultralow pressure flow process, the energy-saving and cost-reducing advantageous conditions that provides.
The present invention not only can be applicable to the various medium and small air separation units condenser/evaporator of deciding, also can be applicable to thermal power plant, nuclear power plant, chemical industry, oil, refrigeration, cryogenic engineering field, realization is to the transformation and the replacement of existing heat exchange equipment essence, reach energy-efficient, the target of further enhancing product performance.
Claims (4)
1. crescent moon shaped channel condensing evaporator, comprise a high-pressure bottle (8), the top of high-pressure bottle disposes air inlet (9) and gas outlet (7), its underpart disposes inlet (6) and liquid outlet (12), feature of the present invention is to dispose some limit off-centre operation pipe mososeries passage tube banks (3) of being made up of interior pipe (1) and outer tube (2) in the high pressure chest (11) of said high-pressure bottle (8).
2. according to the described condenser/evaporator of claim 1, it is characterized in that the two ends of said tube bank (3) are fixed, and are connected with escape pipe (7) and inlet (6) respectively by fixed head (4), (5) respectively.
3. according to claim 1,2 described condenser/evaporators, it is characterized in that, have the fluid infusion sulculus (10) of different spacing on the inner pipe wall of said tube bank (3).
4. according to claim 1,2 described condenser/evaporators, it is characterized in that the length of said tube bank (3) is 600～1500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96118732 CN1067468C (en) | 1996-07-24 | 1996-07-24 | Crescent moon shaped channel condensing evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96118732 CN1067468C (en) | 1996-07-24 | 1996-07-24 | Crescent moon shaped channel condensing evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151013A true CN1151013A (en) | 1997-06-04 |
| CN1067468C CN1067468C (en) | 2001-06-20 |
Family
ID=5125299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96118732 Expired - Fee Related CN1067468C (en) | 1996-07-24 | 1996-07-24 | Crescent moon shaped channel condensing evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067468C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613788A (en) * | 2014-12-23 | 2015-05-13 | 哈尔滨工程大学 | Visual atmospheric type condenser |
| CN106016830A (en) * | 2016-06-16 | 2016-10-12 | 侴乔力 | Siphoning circulation and counter flow heat exchange type ultra-efficient water source heat pump |
-
1996
- 1996-07-24 CN CN 96118732 patent/CN1067468C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613788A (en) * | 2014-12-23 | 2015-05-13 | 哈尔滨工程大学 | Visual atmospheric type condenser |
| CN106016830A (en) * | 2016-06-16 | 2016-10-12 | 侴乔力 | Siphoning circulation and counter flow heat exchange type ultra-efficient water source heat pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1067468C (en) | 2001-06-20 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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: 20010620 Termination date: 20130724 |