JPS54116765A - Heat exchange tube - Google Patents
Heat exchange tubeInfo
- Publication number
- JPS54116765A JPS54116765A JP2413578A JP2413578A JPS54116765A JP S54116765 A JPS54116765 A JP S54116765A JP 2413578 A JP2413578 A JP 2413578A JP 2413578 A JP2413578 A JP 2413578A JP S54116765 A JPS54116765 A JP S54116765A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat exchange
- projections
- exchange tube
- grooves
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
PURPOSE:To aim at enhancing the thermal conductivity without increase of the pressure loss as well as to improve the circulative property of the fluid while promoting seething and condensation by excavating two spiral grooves on the tube's inner wall in such a way that their tilt angles are opposite from the tube's axis. CONSTITUTION:This heat exchange tube 1 is provided with a number of projections 4 at its inner wall in spiral arrangement in such a way that their summits are directed approximately toward the tube's center. These projections are made by excavating two spiral grooves 2, 3 on the tube's inner wall with small pitches and opposite tilt angles from the axis of heat exchange tube, i.e. a right-hand thread and a left-hand thread. These projections can be provided with a form of square pyramid whose summits are situated at the intersecting points of upper edges of these two grooves 2, 3 by making these grooves in V- or U-shaped profile, and thereby a number of oblique crossing fluid passages are formed between projections to offer a heat exchange tube with enlarged inside surface area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2413578A JPS54116765A (en) | 1978-03-02 | 1978-03-02 | Heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2413578A JPS54116765A (en) | 1978-03-02 | 1978-03-02 | Heat exchange tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54116765A true JPS54116765A (en) | 1979-09-11 |
Family
ID=12129864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2413578A Pending JPS54116765A (en) | 1978-03-02 | 1978-03-02 | Heat exchange tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54116765A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726394A (en) * | 1980-07-22 | 1982-02-12 | Hitachi Cable Ltd | Heat conduction pipe with grooves in internal surface |
| JPS57160983A (en) * | 1981-03-25 | 1982-10-04 | Kawamura Kogyo Kk | Tile painting method |
| JPS57160579U (en) * | 1981-03-26 | 1982-10-08 | ||
| JPS5815888U (en) * | 1981-07-20 | 1983-01-31 | 古河電気工業株式会社 | heat exchanger tube |
| US4658892A (en) * | 1983-12-28 | 1987-04-21 | Hitachi Cable, Ltd. | Heat-transfer tubes with grooved inner surface |
| JPS63148078U (en) * | 1988-02-17 | 1988-09-29 | ||
| US5992513A (en) * | 1997-09-17 | 1999-11-30 | Hitachi Cable, Ltd. | Inner surface grooved heat transfer tube |
-
1978
- 1978-03-02 JP JP2413578A patent/JPS54116765A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5726394A (en) * | 1980-07-22 | 1982-02-12 | Hitachi Cable Ltd | Heat conduction pipe with grooves in internal surface |
| JPS6239359B2 (en) * | 1980-07-22 | 1987-08-22 | Hitachi Cable | |
| JPS57160983A (en) * | 1981-03-25 | 1982-10-04 | Kawamura Kogyo Kk | Tile painting method |
| JPS57160579U (en) * | 1981-03-26 | 1982-10-08 | ||
| JPS5815888U (en) * | 1981-07-20 | 1983-01-31 | 古河電気工業株式会社 | heat exchanger tube |
| US4658892A (en) * | 1983-12-28 | 1987-04-21 | Hitachi Cable, Ltd. | Heat-transfer tubes with grooved inner surface |
| JPS63148078U (en) * | 1988-02-17 | 1988-09-29 | ||
| US5992513A (en) * | 1997-09-17 | 1999-11-30 | Hitachi Cable, Ltd. | Inner surface grooved heat transfer tube |
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