DE29517325U1 - Heat exchanger tube - Google Patents
Heat exchanger tubeInfo
- Publication number
- DE29517325U1 DE29517325U1 DE29517325U DE29517325U DE29517325U1 DE 29517325 U1 DE29517325 U1 DE 29517325U1 DE 29517325 U DE29517325 U DE 29517325U DE 29517325 U DE29517325 U DE 29517325U DE 29517325 U1 DE29517325 U1 DE 29517325U1
- Authority
- DE
- Germany
- Prior art keywords
- heat exchanger
- exchanger tube
- cross
- section
- pipe
- 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 - Lifetime
Links
- 239000011324 bead Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000004049 embossing Methods 0.000 claims description 2
- 238000007373 indentation Methods 0.000 claims description 2
- 244000309464 bull Species 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
-
- 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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/424—Means comprising outside portions integral with inside portions
- F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
G 1278 TE-P Z/PfG 1278 TE-P Z/Pf
Die Neuerung bezieht sich auf ein Wärmetauscherrohr- nach dem Oberbegriff des Schutzanspruches 1.The innovation relates to a heat exchanger tube according to the generic term of claim 1.
Mehrere solcher Rohre werden zu sogenannten Rohrbündel-Wärmetauschern zusammengefügt. Diese kommen auch in der Heizungstechnik zum Einsatz. Dort gewinnt die Brennwerttechnik zunehmend an Bedeutung, d.h. die Heizkessel nutzen die im Wasserdampf enthaltene Kondensationswärme durch Abkühlung der Verbrennungsgase bis unter den Taupunkt. Die verwendeten Wärmetauscher benötigen einerseits eine, den geringeren Temperaturdifferenzen zwischen Abgas und Heizwasser angepaßte, große Wärmeübertragungsfläche, andererseits sind aber Bauvolumen und Materialaufwand begrenzt. Zusätzlich muß die Korrosionsbeständigkeit sowie ein geringer Druckverlust beim Beaufschlagen mit Abgas und Kondenswasser gewährleistet sein, weshalb vorwiegend Edelstahl zum Einsatz kommt.Several such pipes are joined together to form so-called tube bundle heat exchangers. These are also used in heating technology. Condensing technology is becoming increasingly important here, i.e. the boilers use the condensation heat contained in the water vapor by cooling the combustion gases to below the dew point. The heat exchangers used require a large heat transfer surface adapted to the lower temperature differences between exhaust gas and heating water, but on the other hand the construction volume and material expenditure are limited. In addition, corrosion resistance and a low pressure loss when exposed to exhaust gas and condensate must be guaranteed, which is why stainless steel is mainly used.
Allgemein gilt, daß die Wärmeübertragungsleistung sehr stark von den
Strömungsbedingungen an den Wärmetauscherrohren abhängt. Dabei hat sich eine turbulente Strömung im Inneren der Rohre als günstig erwiesen.
Diese läßt sich mit entsprechendem Materialaufwand durch Turbulatoren, welche in die Rohre eingeschoben werden, oder durch eine besondere
Gestaltung der Rohrwand erreichen.In general, the heat transfer performance depends very strongly on the
The flow conditions at the heat exchanger tubes are dependent on the turbulent flow inside the tubes. This can be achieved with the appropriate material expenditure by means of turbulators which are inserted into the tubes or by means of a special
Design of the pipe wall.
Zur Verbesserung der Wärmeübertragungsleistung kennt man
beispielsweise aus dem DE-GM 74 27 097 Wärmetauscherrohre mit
muldenartigen Einpressungen, die sich auf kurzen Teilstücken mit runden Rohrquerschnitten abwechseln.To improve heat transfer performance,
for example from DE-GM 74 27 097 heat exchanger tubes with
trough-like indentations, which alternate with round pipe cross-sections on short sections.
Der Neuerung lag die Aufgabe zugrunde, ein kostengünstig herstellbares
Wärmetauscherrohr zu schaffen, welches bei geringem Materialeinsatz
durch gezielte Strömungsführung hohe Wärmeübertragungsleistungen
erreicht.The innovation was based on the task of creating a cost-effective
To create a heat exchanger tube that uses little material
High heat transfer performance through targeted flow guidance
reached.
Neuerungsgemäß wird dies mit den im Schutzanspruch 1 genannten Merkmalen gelöst.According to the innovation, this is solved with the features mentioned in claim 1.
Das Wärmetauscherrohr besitzt an seinen beiden Enden einen
kreisförmigen Anschlußquerschnitt. Der gesamte dazwischenliegende
mittlere Rohrteil ist durch Pressen von zwei Seiten als flacher Kanal ausgebildet,
dessen Querschnittsform über die Länge variiert oder konstant ist.
Im wesentlichen weist der mittlere Rohrteil einen ovalen oder rechteckigen Querschnitt auf. So ist es mit einfachen Umformtechniken möglich, diesen
in Längsrichtung zu variieren, um die Strömungsgeschwindigkeit der innenThe heat exchanger tube has a
circular connection cross-section. The entire intermediate
The middle part of the pipe is formed by pressing from two sides as a flat channel, the cross-sectional shape of which varies or is constant over the length.
The middle section of the pipe essentially has an oval or rectangular cross-section. Using simple forming techniques, it is possible to vary this in the longitudinal direction in order to adjust the flow velocity of the inner
strömenden Heizgase bei Abkühlung auf gleichem Niveau zu halten. Durch die flachen Kanäle wird eine Kernströmung vermieden und die Wärmeabgabe im Wandbereich begünstigt. Beim Einsatz unter hohen Druckbelastungen von außen lassen sich in der Profilmitte leicht Abstützpunkte durch Zusammenpressen von zwei gegenüberliegenden Rohrwänden schaffen.to keep the flowing heating gases at the same level when cooling down. The flat channels prevent core flow and promote heat dissipation in the wall area. When used under high pressure loads from the outside, support points can easily be created in the middle of the profile by pressing two opposing pipe walls together.
Um den Wärmeübergang zu begünstigen, sind am mittleren Rohrbereich vorzugsweise drallförmig oder radial verlaufende Prägungen oder Sicken angebracht. Weiterhin kann die Rauhigkeit der inneren Rohrwand durch eine Beschichtung erhöht werden. Die Maßnahmen führen zur Ausbildung einer durchgehenden hochturbulenten Grenzschicht ohne nennenswerte Kernströmung. Die Wärmeübertragungseigenschaften erreichen Qualitäten wie bei Plattenwärmetauschern. Mit der Verwendung von Rohren ergeben sich, neben der einfachen Umformung, zusätzlich Vorteile in Bezug auf Festigkeit und spannungsarme Verbindung bei der Erstellung größerer Einheiten. Versuche haben geringere heizgasseitige Druckverluste dieser Rohre als mit eingeschobenen Turbulatoren bestätigt. Somit lassen sich sehr effiziente, kompakte und materialsparende Wärmetauscher, besonders für das Anwendungsgebiet Brennwerttechnik, herstellen.To promote heat transfer, swirl-shaped or radial embossings or beads are preferably applied to the middle of the pipe. The roughness of the inner pipe wall can also be increased by a coating. The measures lead to the formation of a continuous, highly turbulent boundary layer without any significant core flow. The heat transfer properties achieve qualities similar to those of plate heat exchangers. In addition to the simple forming, the use of pipes also offers advantages in terms of strength and low-stress connections when creating larger units. Tests have confirmed that these pipes have lower pressure losses on the hot gas side than with inserted turbulators. This makes it possible to produce very efficient, compact and material-saving heat exchangers, particularly for condensing technology applications.
Die Zeichnung stellt Ausführungsbeispiele der Neuerung dar. Es zeigt:The drawing shows examples of the innovation. It shows:
Fig. 1: Ein Wärmetauscherrohr mit gleichmäßiger Veränderung desFig. 1: A heat exchanger tube with uniform change of the
Querschnitts.
Fig. 2: Ein Wärmetauscherrohr mit stufenweiser Veränderung descross-section.
Fig. 2: A heat exchanger tube with stepwise change of the
Querschnitts.cross-section.
Fig. 3: Einen Schnitt durch ein Rohr mit ovalem Querschnitt.Fig. 3: A section through a pipe with oval cross-section.
Fig. 4: Einen Schnitt durch ein Rohr mit rechteckigem Querschnitt.Fig. 4: A section through a pipe with rectangular cross-section.
Fig. 5: Einen Schnitt durch ein Rohr mit Abstützpunkten für hoheFig. 5: A section through a pipe with support points for high
Druckbeständigkeit.
Fig. 6: Ein Wärmetauscherrohr mit kreuzdrallförmig eingebrachtenPressure resistance.
Fig. 6: A heat exchanger tube with cross-twisted
Sicken.
Fig. 7: Einen Schnitt durch ein Rohr mit drallförmig eingebrachtenbeads.
Fig. 7: A section through a pipe with spiral-shaped
Sicken.beads.
Das Wärmetauscherrohr besitzt an seinen beiden Enden einen kreisförmigen Anschlußquerschnitt 1. Der gesamte dazwischenliegende mittlere Rohrteil ist durch Pressen von zwei Seiten als flacher Kanal 2 ausgebildet, dessen Querschnittsform über die Länge konstant ist oder variiert. Beispielsweise erfolgt die Querschnittsänderung kontinuierlich wie in Fig. 1 oder in Stufen 3 wie in Fig. 2. Es lassen sich im wesentlichen ovale 4 sowie rechteckförmige Querschnitte 5 herstellen. An eingeprägten Abstützpunkten 6 tragen die Rohrwände hohe Druckbelastungen von außen ab. Um den Wärmeübergang zu begünstigen, sind am mittleren Rohrbereich drallförmig oder kreuzdrallförmig verlaufende Sicken 7 angebracht.The heat exchanger tube has a circular connection cross-section 1 at both ends. The entire middle tube section in between is formed by pressing from two sides as a flat channel 2, the cross-sectional shape of which is constant or varies over the length. For example, the cross-sectional change occurs continuously as in Fig. 1 or in stages 3 as in Fig. 2. Essentially oval 4 and rectangular cross-sections 5 can be produced. The tube walls absorb high pressure loads from the outside at embossed support points 6. To promote heat transfer, swirl-shaped or cross-swirl-shaped beads 7 are attached to the middle tube area.
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29517325U DE29517325U1 (en) | 1995-11-02 | 1995-11-02 | Heat exchanger tube |
EP19960114202 EP0772017A3 (en) | 1995-11-02 | 1996-09-05 | Heat exchanger tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29517325U DE29517325U1 (en) | 1995-11-02 | 1995-11-02 | Heat exchanger tube |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29517325U1 true DE29517325U1 (en) | 1996-02-01 |
Family
ID=8014884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29517325U Expired - Lifetime DE29517325U1 (en) | 1995-11-02 | 1995-11-02 | Heat exchanger tube |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0772017A3 (en) |
DE (1) | DE29517325U1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29709136U1 (en) * | 1997-05-24 | 1997-07-24 | Viessmann Werke Gmbh & Co, 35108 Allendorf | Heat exchanger tube |
DE19731190A1 (en) * | 1997-07-21 | 1999-01-28 | Buderus Heiztechnik Gmbh | Heat exchanger pipe for hot gases in boiler |
EP1050721A1 (en) * | 1999-05-04 | 2000-11-08 | Guillot Industrie | Heat exchanger for a water heater |
DE102004020346B4 (en) * | 2004-04-27 | 2009-06-10 | Robert Bosch Gmbh | Condensing boiler |
DE102009013269A1 (en) * | 2009-03-05 | 2010-09-09 | E.G.O. Elektro-Gerätebau GmbH | Flow heater and method of making a flow heater |
EP3276290A1 (en) * | 2016-07-26 | 2018-01-31 | S.A.R.I. - Stampi Articoli Industriali Di Zen Bortolo | Tubular device for the transit of a heat exchange fluid, particularly for heat exchangers |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19725454C2 (en) * | 1997-06-16 | 1999-05-20 | Georg Wall | Sheet pile |
DE10100241A1 (en) | 2001-01-05 | 2002-07-18 | Hde Metallwerk Gmbh | Heat exchanger tube for liquid or gaseous media |
DE10330636A1 (en) | 2003-07-07 | 2005-02-10 | Bayer Technology Services Gmbh | Process for the leaching of aluminum-metal alloys |
DE10333577A1 (en) * | 2003-07-24 | 2005-02-24 | Bayer Technology Services Gmbh | Method and apparatus for removing volatile substances from highly viscous media |
GB2509762B (en) * | 2013-01-14 | 2015-02-04 | Halla Visteon Climate Control | Tube for Heat Exchanger |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7427097U (en) | 1976-06-10 | R. & G. Schmoele Metallwerke, 5750 Menden | Tube for heat exchanger for liquid media | |
US4216819A (en) * | 1976-09-09 | 1980-08-12 | Union Carbide Corporation | Enhanced condensation heat transfer device and method |
US4589481A (en) * | 1982-06-29 | 1986-05-20 | Ab Zander & Ingestrom | Tube heat exchanger |
SE456935B (en) * | 1984-05-24 | 1988-11-14 | Armaturjonsson Ab | HEAT EXCHANGER THERE FLOWING PLATES WITH STRILHAIR ARE PLACED IN EACH SLING OF A SERPENT INFORMATION PIPE AND SUITABLE FOR PREPARATION |
AT400365B (en) * | 1993-10-15 | 1995-12-27 | Fercher Josef | Heat exchanger |
DE4343405A1 (en) * | 1993-12-18 | 1995-06-22 | Friedrich Ambs Gmbh & Co Kg Ap | Heat exchange tube for tube cluster heat exchanger |
-
1995
- 1995-11-02 DE DE29517325U patent/DE29517325U1/en not_active Expired - Lifetime
-
1996
- 1996-09-05 EP EP19960114202 patent/EP0772017A3/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29709136U1 (en) * | 1997-05-24 | 1997-07-24 | Viessmann Werke Gmbh & Co, 35108 Allendorf | Heat exchanger tube |
DE19731190A1 (en) * | 1997-07-21 | 1999-01-28 | Buderus Heiztechnik Gmbh | Heat exchanger pipe for hot gases in boiler |
EP1050721A1 (en) * | 1999-05-04 | 2000-11-08 | Guillot Industrie | Heat exchanger for a water heater |
FR2793313A1 (en) * | 1999-05-04 | 2000-11-10 | Guillot Ind Sa | HEAT EXCHANGER FOR EQUIPPING A HOT WATER BOILER |
DE102004020346B4 (en) * | 2004-04-27 | 2009-06-10 | Robert Bosch Gmbh | Condensing boiler |
DE102009013269A1 (en) * | 2009-03-05 | 2010-09-09 | E.G.O. Elektro-Gerätebau GmbH | Flow heater and method of making a flow heater |
EP2226584A3 (en) * | 2009-03-05 | 2011-04-13 | E.G.O. Elektro-Gerätebau GmbH | Flow heater and method for producing same |
EP3276290A1 (en) * | 2016-07-26 | 2018-01-31 | S.A.R.I. - Stampi Articoli Industriali Di Zen Bortolo | Tubular device for the transit of a heat exchange fluid, particularly for heat exchangers |
Also Published As
Publication number | Publication date |
---|---|
EP0772017A3 (en) | 1998-07-29 |
EP0772017A2 (en) | 1997-05-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 19960314 |
|
R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 19981130 |
|
R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20011212 |
|
R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20031106 |
|
R081 | Change of applicant/patentee |
Owner name: BBT THERMOTECHNIK GMBH, DE Free format text: FORMER OWNER: BUDERUS HEIZTECHNIK GMBH, 35576 WETZLAR, DE Effective date: 20041227 |
|
R071 | Expiry of right |