DE4425006A1 - Heat transfer improvement device for smoke tubes - Google Patents
Heat transfer improvement device for smoke tubesInfo
- Publication number
- DE4425006A1 DE4425006A1 DE19944425006 DE4425006A DE4425006A1 DE 4425006 A1 DE4425006 A1 DE 4425006A1 DE 19944425006 DE19944425006 DE 19944425006 DE 4425006 A DE4425006 A DE 4425006A DE 4425006 A1 DE4425006 A1 DE 4425006A1
- Authority
- DE
- Germany
- Prior art keywords
- ribs
- article
- tubes
- rolled
- spiral
- 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.)
- Withdrawn
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
Description
Die Erfindung betrifft Rauchrohre mit den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to smoke pipes with the features of the preamble of claim 1.
Es ist bekannt, daß der Wärmeübergang bei Gasen auf Rohre, hier bei Rauchgas oder Luft, wesentlich schlechter ist als bei Flüssigkeiten. Aus diesem Grund werden rauchgasberührte Rohre außen mit Rippen versehen, die entweder aus dem Material herausgearbeitet oder schweißtechnisch oder über ein Schmelzbad metallisch mit dem Rohrmaterial verbunden werden.It is known that the heat transfer from gases to pipes, here from flue gas or air, is much worse than liquids. For this reason, pipes in contact with smoke gas are provided with ribs on the outside, who either worked out of the material or welding technology or be metallically connected to the pipe material via a weld pool.
Eine Oberflächenvergrößerung auf der Innenseite bei Rohren aus Buntmetallen ist in der Luft- und Kältetechnik bekannt.A surface enlargement on the inside of tubes made of non-ferrous metals is known in ventilation and refrigeration technology.
Eine Oberflächenvergrößerung auf der Innenseite durch Berippung bei Rauchrohren aus Stahl ist nachträglich nicht üblich. Um trotzdem einen besseren Wärmeübergang zu erzielen, werden Turbulenzen in der Strömung erzeugt durch Einbauten wie Drallkörper oder Drahtwendel. Es werden auch sogenannte Turbulenzrohre verwendet, die durch nachträgliche Formveränderung durch Eindrücken von Dellen hergestellt werden. Diese Rohre sind aber in der Druckstufe nach oben hin begrenzt.An increase in surface area on the inside due to ribbing in smoke pipes made of steel is not common afterwards. In order to still achieve better heat transfer, there is turbulence generated in the flow by internals such as swirl bodies or wire helices. So-called turbulence pipes are also used, which are replaced by subsequent ones Shape change can be made by indenting dents. These However, pipes are limited in terms of pressure.
Mit der Erfindung werden Verfahren vorgestellt, wie entweder beim Ziehen der nahtlosen Rohre, beim Herstellen längsgeschweißter Rohre oder nachträglich bei Glattrohren die Oberfläche der Innenseite so verändert werden kann, daß durch Oberflächenvergrößerung und durch Strömungsbeeinflussung ein wesentlich besserer Wärmeübergang erreicht wird.Methods are presented with the invention, such as when pulling of seamless pipes, when producing longitudinally welded pipes or afterwards the surface of the inside of smooth pipes can be changed in this way can that by increasing the surface area and by influencing the flow a much better heat transfer is achieved.
Durch die neuen Verfahren werden die "innenberippten" Rohre von Druck und Temperatur unabhängig einsetzbar. Die Höhe der "Rippen" und der Warzen wird optimiert nach erreichbarem besseren Wärmeübergang und nach dem zu vertretbaren höheren Strömungswiderstand. Vorzugsweise wird eine Höhe von 1 bis 2 mm gewählt.Thanks to the new process, the "internally finned" tubes of pressure and Temperature can be used independently. The height of the "ribs" and the warts is optimized for better achievable Heat transfer and according to the justifiable higher flow resistance. A height of 1 to 2 mm is preferably selected.
Bei eingewalzten "Rippen", die als Wellen ausgebildet sind, können die Wellen wesentlich tiefer sein. Sie werden jedoch vorzugsweise bei 3 bis 5 mm gewählt. Die Breite sollte in etwa der Tiefe entsprechen.With rolled-in "ribs", which are designed as waves, the Waves be much deeper. However, they are preferably at 3 to 5 mm selected. The width should correspond approximately to the depth.
Der Abstand der Radialwellen beträgt vorzugsweise 20 bis 50 mm. Für die Steigung der spiralförmig eingewalzten oder durch Auftragsschweißung hergestellten Rippen werden 50 mm bevorzugt. Das Einwalzen kann bei dünnen Wanddicken kalt erfolgen, während bei größeren Wanddicken und bei Glasrohren das Verformen bei höheren Temperaturen vorgenommen wird. Bei nahtlos gezogenen Rohren kann eine Innenberippung auch schon beim Ziehvorgang hergestellt werden. Bei längsgeschweißten Rohren kann die Innenberippung in jeder gewünschten Form schon beim Flachstahl vorgenommen werden.The distance between the radial shafts is preferably 20 to 50 mm. For the slope of the spiral rolled or by build-up welding ribs produced are preferred 50 mm. Rolling in can be done cold with thin wall thicknesses, while with larger ones Wall thicknesses and for glass tubes, deformation at higher temperatures is made. In the case of seamless drawn tubes, internal ribbing can also be used on the Drawing process. With longitudinally welded pipes, the internal fins can be in any desired Shape can be made with flat steel.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944425006 DE4425006A1 (en) | 1994-07-15 | 1994-07-15 | Heat transfer improvement device for smoke tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944425006 DE4425006A1 (en) | 1994-07-15 | 1994-07-15 | Heat transfer improvement device for smoke tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4425006A1 true DE4425006A1 (en) | 1996-01-18 |
Family
ID=6523237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19944425006 Withdrawn DE4425006A1 (en) | 1994-07-15 | 1994-07-15 | Heat transfer improvement device for smoke tubes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4425006A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT404616B (en) * | 1996-04-26 | 1999-01-25 | Braas Gmbh | CERAMIC PIPE FOR A CHIMNEY |
EP0893509A1 (en) * | 1997-07-23 | 1999-01-27 | MANNESMANN Aktiengesellschaft | Waste heat boiler |
DE19654363B4 (en) * | 1996-12-24 | 2007-09-27 | Behr Gmbh & Co. Kg | Exhaust gas heat exchanger for an internal combustion engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4850336A (en) * | 1987-06-16 | 1989-07-25 | Sankyo Manufacturing Company, Ltd. | Flue control device |
DE9308512U1 (en) * | 1992-05-29 | 1993-09-02 | Joh. Vaillant Gmbh U. Co, 42859 Remscheid | Flue gas exhaust pipe |
-
1994
- 1994-07-15 DE DE19944425006 patent/DE4425006A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4850336A (en) * | 1987-06-16 | 1989-07-25 | Sankyo Manufacturing Company, Ltd. | Flue control device |
DE9308512U1 (en) * | 1992-05-29 | 1993-09-02 | Joh. Vaillant Gmbh U. Co, 42859 Remscheid | Flue gas exhaust pipe |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT404616B (en) * | 1996-04-26 | 1999-01-25 | Braas Gmbh | CERAMIC PIPE FOR A CHIMNEY |
DE19654363B4 (en) * | 1996-12-24 | 2007-09-27 | Behr Gmbh & Co. Kg | Exhaust gas heat exchanger for an internal combustion engine |
EP0893509A1 (en) * | 1997-07-23 | 1999-01-27 | MANNESMANN Aktiengesellschaft | Waste heat boiler |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
8110 | Request for examination paragraph 44 | ||
8139 | Disposal/non-payment of the annual fee |