JPS5758093A - Condensing heat transfer pipe - Google Patents
Condensing heat transfer pipeInfo
- Publication number
- JPS5758093A JPS5758093A JP13241580A JP13241580A JPS5758093A JP S5758093 A JPS5758093 A JP S5758093A JP 13241580 A JP13241580 A JP 13241580A JP 13241580 A JP13241580 A JP 13241580A JP S5758093 A JPS5758093 A JP S5758093A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- heat transfer
- wet
- groove
- rising
- 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.)
- Granted
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 improve the condensing heat transfer efficiency of the captioned heat transfer pipe by a method wherein a spiral fine groove and a spiral rising are provided on the inner wall surface of the heat transfer pipe and a plurality of streak- like wet-proof sections which do not get wet from a condensed liquid are provided over the groove and the rising so as to intersect the latters. CONSTITUTION:The spiral groove 2 having a number of closely spaced continuous turhns and the rising 3 separating the turns of the groove are formed on the inner wall surface of the condensing heat transfer pipe 1. Further, the streak-like and wet-proof sections 4 which do not get wet from the condensed liquid are provided over the groove and the rising in the longitudinal direction of the pipe 1. For the formation of the wet-proof sections 4, a coating of an ethylene tetrafluoride or a noble metal plating or the like is utilized. With the above structure, a film of the liquid formed on the surface of the rising 3 as a result of condensation of the liquid flows into the groove due to the surface tension of the liquid and is splashed by the liquid cutting action of a stream of liquid vapor at each of the wet-proof sections 4 so that the liquid becomes drops. Thus, the heat transfer surface of the pipe 1 which is effective for the condensation of the liquid is always subjected to the liquid vapor and therefore, the heat transfer efficiency of the pipe can be improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13241580A JPS5758093A (en) | 1980-09-25 | 1980-09-25 | Condensing heat transfer pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13241580A JPS5758093A (en) | 1980-09-25 | 1980-09-25 | Condensing heat transfer pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5758093A true JPS5758093A (en) | 1982-04-07 |
JPS5741675B2 JPS5741675B2 (en) | 1982-09-04 |
Family
ID=15080840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13241580A Granted JPS5758093A (en) | 1980-09-25 | 1980-09-25 | Condensing heat transfer pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5758093A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5704424A (en) * | 1995-10-19 | 1998-01-06 | Mitsubishi Shindowh Co., Ltd. | Heat transfer tube having grooved inner surface and production method therefor |
-
1980
- 1980-09-25 JP JP13241580A patent/JPS5758093A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5704424A (en) * | 1995-10-19 | 1998-01-06 | Mitsubishi Shindowh Co., Ltd. | Heat transfer tube having grooved inner surface and production method therefor |
Also Published As
Publication number | Publication date |
---|---|
JPS5741675B2 (en) | 1982-09-04 |
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