CN2236116Y - Drop-shaped nail-head tube - Google Patents
Drop-shaped nail-head tube Download PDFInfo
- Publication number
- CN2236116Y CN2236116Y CN 95228554 CN95228554U CN2236116Y CN 2236116 Y CN2236116 Y CN 2236116Y CN 95228554 CN95228554 CN 95228554 CN 95228554 U CN95228554 U CN 95228554U CN 2236116 Y CN2236116 Y CN 2236116Y
- Authority
- CN
- China
- Prior art keywords
- nail
- tube
- head
- heat transfer
- utility
- 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.)
- Expired - Fee Related
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a drip-shaped tube nail-head tube, composed of a heat exchange parent tube and nail heads densely arranged at the external wall of the parent tube, which is characterized in that the nail head is a drip-shaped cylinder. The utility model has the advantages that ensemble average convective heat transfer coefficient of the nail-head tube is 10-26% higher than that of a column nail head tube, and is 8-15% higher than that of a cylindroid nail head; the resistance against flue gas of the drip-shaped nail-head tube is 50% lower than that of column nail head, and is 15% lower than that of cylindroid nail head; in addition, the utility model with the characteristics of intensive heat transfer and lower flow resistance is a high-efficiency and energy-saving heat transfer element, which is suitable for the nail-head tubes used for convective heat transfer of various industrial heating furnaces.
Description
The utility model belongs to the parts of heat-exchange device, particularly a kind of studded tube of heat convection.
In the convection cell of industrial heating furnace, because the film heat transfer coefficient of the outer flue gas of pipe is more much smaller than the film heat transfer coefficient of medium in the pipe, so start to control thermal resistance flue gas one side outside pipe of making usefulness.For strengthening the convection heat transfer' heat-transfer by convection effect, often use studded tube as heat exchanger tube, promptly densely covered ailhead is set at heat exchange parent tube outer wall.On existing ailhead, major part is used the cylinder ailhead, studies show that recently, on studded tube, use the elliptical cylinder-shape ailhead, can receive the positive effect of augmentation of heat transfer and reduction flow resistance, but the cross section profile of cylindroid ailhead and cylinder ailhead is close, form drag improves little.
The purpose of this utility model is, designs and produces the studded tube of a kind of shape cylinder, utilizes to drip shape pole section profile near streamlined, separates the very narrow characteristics of tail, with further reinforcement convection heat transfer' heat-transfer by convection with reduce flow resistance, becomes energy-efficient heat transfer element.
Pin finned drop shaped tube of the present utility model is made up of the ailhead that is provided with that gathers on heat exchange parent tube and the parent tube outer wall, it is characterized in that ailhead is a shape cylinder.
The utility model has the advantages that the population mean convection transfer rate of pin finned drop shaped tube is higher by 10～26% than cylinder studded tube, and is higher by 8～15% than cylindroid studded tube; Pin finned drop shaped tube is low by 50% to the resistance ratios cylinder studded tube of flue gas, than cylindroid studded tube low 15%; Having the characteristics of augmentation of heat transfer and reduction flow resistance, is energy-efficient heat transfer element.Be applicable to the studded tube of heat convection in the various industrial heating furnace convection cells.
Below in conjunction with drawings and Examples, the utility model will be further described:
Fig. 1 is the organigram of pin finned drop shaped tube
Fig. 2 is the A-A profile of Fig. 1
Fig. 3 drips shape pole section figure
As seen from the figure, pin finned drop shaped tube of the present utility model is made up of the ailhead 2 that is provided with that gathers on heat exchange parent tube 1 and the parent tube outer wall, and ailhead is a shape cylinder.Dripping the shape cylinder is of a size of: 9 millimeters of major part circular diameters, and 6 millimeters of microcephaly's circular diameters, 8.5 millimeters of two center of circle centre-to-centre spacing are followed closely high 20 millimeters.Be provided with on the heat exchange parent tube outer wall when dripping shape cylinder ailhead, major part is last, and the microcephaly is dripped shape cylinder interlaced arrangement and is quincunx down, and is moving in order to the flue gas attached jet.
Claims (1)
1, a kind of pin finned drop shaped tube is made up of the ailhead that is provided with that gathers on heat exchange parent tube and the parent tube outer wall, it is characterized in that ailhead is a shape cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95228554 CN2236116Y (en) | 1995-12-22 | 1995-12-22 | Drop-shaped nail-head tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95228554 CN2236116Y (en) | 1995-12-22 | 1995-12-22 | Drop-shaped nail-head tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2236116Y true CN2236116Y (en) | 1996-09-25 |
Family
ID=33874071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95228554 Expired - Fee Related CN2236116Y (en) | 1995-12-22 | 1995-12-22 | Drop-shaped nail-head tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2236116Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102317705A (en) * | 2009-02-12 | 2012-01-11 | 曳达研究和发展有限公司 | The solar receiver system |
| CN102538540A (en) * | 2012-01-18 | 2012-07-04 | 江苏焱鑫科技股份有限公司 | Enameled studded tube and manufacture method thereof |
| US8960184B2 (en) | 2008-08-31 | 2015-02-24 | Yeda Research And Development Co. Ltd. | Solar receiver system |
-
1995
- 1995-12-22 CN CN 95228554 patent/CN2236116Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8960184B2 (en) | 2008-08-31 | 2015-02-24 | Yeda Research And Development Co. Ltd. | Solar receiver system |
| CN102317705A (en) * | 2009-02-12 | 2012-01-11 | 曳达研究和发展有限公司 | The solar receiver system |
| CN102538540A (en) * | 2012-01-18 | 2012-07-04 | 江苏焱鑫科技股份有限公司 | Enameled studded tube and manufacture method thereof |
| CN102538540B (en) * | 2012-01-18 | 2013-07-10 | 江苏焱鑫科技股份有限公司 | Enameled studded tube and manufacture method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |