DE839806C - Star-shaped folded tube as an insert tube for heat exchangers - Google Patents
Star-shaped folded tube as an insert tube for heat exchangersInfo
- Publication number
- DE839806C DE839806C DEP50728A DEP0050728A DE839806C DE 839806 C DE839806 C DE 839806C DE P50728 A DEP50728 A DE P50728A DE P0050728 A DEP0050728 A DE P0050728A DE 839806 C DE839806 C DE 839806C
- Authority
- DE
- Germany
- Prior art keywords
- tube
- star
- heat exchangers
- insert
- shaped folded
- 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
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
- F28F1/02—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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
Für Wärmcaustauscher ist bereits vorgeschlagen Nvorden, zwecks Unterbringung großer Heizfläche auf kleinem Raum Falteneinsatzrohre von sternförrnigern Querschnitt zu verwenden. Die vorliegende Erfindung bezieht sich auf eine Weiterbildung solcher Wärmeaustauschrohre, damit diese auch für solche Zwecke, vorteilhaft brauchbar sind, bei welchen das eine Wärmeaustauschmittel gegenüber dem anderen einen größerenÜberdruckbesitzt.Nvorden is already proposed for heat exchangers, for the purpose of housing large heating surface in a small space to use. The present invention relates to a further development of such Heat exchange tubes so that they can also be used advantageously for such purposes, in which one heat exchange medium has a greater overpressure than the other.
Erfindungsgemäß wird vorgeschlagen, die Flanken der Rohrfalten der Einsatzrohre bei Überdruck des zwischen dem Außenmantel und dem Einsatzrohr fließenden Arbeitsmittels nach außen und bei Überdruck des Arbeitsmittels im Innern des Faltünrohres nach innen zu wölben. DurchAiese Maßnahme läßt sich die Wandstärke der Rohrflanken dünner ausführen, weil der Baustoff gewölb-,-artig auf Druck beansprucht wird, wogegen bei den bekannten geraden Flanken Biegungsbeanspruchungen auftreten; außerdem erzielt man eine Verbesserung des Wärmedurchgangs und eine wesentliche Gewichts- und Kostenersparnis, was besonders für die Verwendung korrosionsbeständiger Werkstoffe beachtlich ist.According to the invention it is proposed that the flanks of the tube folds Insert pipes at overpressure of the flowing between the outer jacket and the insert pipe Working medium to the outside and in the case of excess pressure of the working medium inside the folding tube to bulge inwards. The wall thickness of the pipe flanks can be determined by this measure Run thinner, because the building material is arched -, - like under pressure, on the other hand bending stresses occur with the known straight flanks; also achieved there is an improvement in the heat transfer and significant weight and cost savings, which is particularly noteworthy for the use of corrosion-resistant materials.
Die sternförmigen Faltenrohre können in bekannter Weise aus runden Rohren gewalzt oder gezogen, oder aus flachen Blechstreifen und bandförmigem Flachstahl 'hergestellt, zu Rohren gerollt und durch Schweißung der Stoßst-ellen verbunden werden. In der Zeichnung sind einige Anwendüngsbeispiele dargestellt.The star-shaped folded tubes can be rounded in a known manner Tubes rolled or drawn, or made from flat sheet metal strips and flat steel 'manufactured, rolled into tubes and connected by welding the joints will. Some application examples are shown in the drawing.
Abt). i zeigt ein sternförmiges Faltenrohr a mit Falten c, bei welchem das eine Wärmeübertragungsmittel mit höherem Druck in den zwischen dem Mantel A und dem Faltenrohr a befindlichen Räumen b strömt. Die Flanken c' des Einsatzrohres sind infolge des äußeren Überdrucks nach außen gewölbt. Zur Aufrechterhaltung der Sternform sind Ringe e in gewissem Abstande eingelegt und durch Punktschweißung befestigt, an welche sich die Innenstellen der Rohrfalten abstützen. Das sternförmige Faltenrohr a ist im gewählten Beispiel mit acht Falten versehen; die Zahl der Falten kann jedoch beliebig gewählt werden, sie hängt von der Größe des Durchmessers ab. Abbot). i shows a star-shaped folded tube a with folds c, in which one heat transfer medium flows at a higher pressure in the spaces b located between the jacket A and the folded tube a. The flanks c 'of the insert tube are curved outwards as a result of the external overpressure. To maintain the star shape, rings e are inserted at a certain distance and fastened by spot welding, on which the inner parts of the tube folds are supported. The star-shaped fold tube a is provided with eight folds in the example chosen; however, the number of folds can be chosen arbitrarily, it depends on the size of the diameter.
Abb. 2 zeigt ein Doppelrohr B mit einem Faltenrohr a mit ebenfalls acht Falten c; aber hier ist der höhere Druck im Innern d des Faltenrohres a, und die Rohrflanken c' sind erfindungsgemäß nach innen gewölbt.Fig. 2 shows a double tube B with a folded tube a also with eight folds c; but here the higher pressure is in the interior d of the folded tube a, and the tube flanks c 'are curved inwards according to the invention.
Durch die vorgeschlagene Anordnung der Falten wird erreicht, daß der Baustoff jeweils auf Druck beansprucht wird.The proposed arrangement of the folds ensures that the Building material is stressed in each case by pressure.
In Abb. 3a und 3 b sind nun zwei Querschnitte durch einen Wärmeaustauscher mit den in Abb. i und 2 beschriebenen Faltenrohren a bzw. Doppelröhren B mit Faltenrohren a dargestellt.In Fig. 3a and 3b , two cross-sections through a heat exchanger with the folded tubes a and double tubes B with folded tubes a described in Fig. I and 2 are shown.
Im unteren Teil 3 b sind für die Wärrrwübertragung in einem größeren Mantel A Doppelrohre B nach Abb.2 angewendet. Die Rohrflanken c' der Rohrfalten c sind infolge des größeren Druckes in den Innenräumen d der sternförmigen Einsatzrohre a nach innen gewölbt.In the lower part 3 b , double pipes B as shown in Fig. 2 are used for heat transfer in a larger jacket A. The pipe flanks c 'of the pipe folds c are arched inwards as a result of the greater pressure in the interior spaces d of the star-shaped insert pipes a.
Im oberen Teil 3a sind die Faltenrohre a für sich als Wärmeübertragungselement angeordnet, und zwar befindet sich im Mantel A eine größere Anzahl solcher für äußeren Druck geeigneter Faltenrohre a. Das zwischen Außenmäntel A und den einfachen Faltenrohren a befindliche Wärmeübertragungsmittcl besitzt einen höheren Druck als das, welches durch das Innere d der Faltenrohre a strömt.In the upper part 3a, the folded tubes a are arranged as a heat transfer element, namely in the jacket A there is a larger number of such folded tubes a suitable for external pressure. The heat transfer medium located between the outer jacket A and the simple folded tubes a has a higher pressure than that which flows through the interior d of the folded tubes a.
Bei der Ausführung nach Abb. 3 b mit Doppelröhren B sind, wie auch in der deutschen Patentschrift 814 159 dargestellt, für den Anschluß der äußeren Mantelrohre wie auch für die sternförmigen Innenrohre a an jeder Rohrwandseite zwei Kammern notwendig. Bei Verwendung der Faltenrohre für gich (Abb. 3a) sind an einer jeden Rohraustrittsseite nur eine Kammer zur Zusammenfassung der Rohrausmündungen von a erforderlich, was für manche Zwecke- einfacher ist, obgleich die Heizfläche kleiner ausfällt.In the embodiment according to Fig. 3 b with double tubes B, as also shown in German Patent 814 159, two chambers are necessary for the connection of the outer casing pipes as well as for the star-shaped inner pipes a on each side of the pipe wall. When using the folded tubes for the same (Fig. 3a), only one chamber is required on each tube outlet side to combine the tube openings from a, which is easier for some purposes, although the heating surface is smaller.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP50728A DE839806C (en) | 1949-08-02 | 1949-08-02 | Star-shaped folded tube as an insert tube for heat exchangers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP50728A DE839806C (en) | 1949-08-02 | 1949-08-02 | Star-shaped folded tube as an insert tube for heat exchangers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE839806C true DE839806C (en) | 1952-05-26 |
Family
ID=7384603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP50728A Expired DE839806C (en) | 1949-08-02 | 1949-08-02 | Star-shaped folded tube as an insert tube for heat exchangers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE839806C (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2733215A1 (en) * | 1976-08-23 | 1978-03-09 | Borg Warner | HEAT EXCHANGER FOR CAR COMBUSTION ENGINES |
DE2753115A1 (en) * | 1976-11-30 | 1978-06-01 | Ilmar Mets | EXHAUST VENTILATION DEVICE |
DE2654253A1 (en) * | 1976-11-30 | 1978-06-08 | Via Gmbh | Compressed air drying by refrigeration - having extended surfaces with extended meandering metal sheet on tube surfaces |
FR2392708A1 (en) * | 1976-11-30 | 1978-12-29 | Via Gmbh | APPARATUS FOR DRYING BY COLD GAS, IN PARTICULAR COMPRESSED AIR |
EP0098446A2 (en) * | 1982-07-01 | 1984-01-18 | BASF Aktiengesellschaft | Heat exchanger |
US5215144A (en) * | 1991-02-18 | 1993-06-01 | Siemens Aktiengesellschaft | Heat exchanger |
DE4404068C1 (en) * | 1994-02-09 | 1995-08-17 | Wolfgang Engelhardt | Heat exchanger |
EP0932009A2 (en) * | 1998-01-22 | 1999-07-28 | Robert Bosch Gmbh | Heat exchanger for fuel-heated water heater, more particularly for condensing boiler |
WO2001059385A1 (en) * | 2000-02-08 | 2001-08-16 | Hackman Wedholms Ab | A heat exchanger and use thereof |
RU2493526C2 (en) * | 2008-10-20 | 2013-09-20 | Эбнер Индустриофенбау Гезелльшафт М.Б.Х. | Heat-exchanger of annealing furnace for heat exchange between two fluid media |
-
1949
- 1949-08-02 DE DEP50728A patent/DE839806C/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2733215A1 (en) * | 1976-08-23 | 1978-03-09 | Borg Warner | HEAT EXCHANGER FOR CAR COMBUSTION ENGINES |
DE2753115A1 (en) * | 1976-11-30 | 1978-06-01 | Ilmar Mets | EXHAUST VENTILATION DEVICE |
DE2654253A1 (en) * | 1976-11-30 | 1978-06-08 | Via Gmbh | Compressed air drying by refrigeration - having extended surfaces with extended meandering metal sheet on tube surfaces |
FR2392708A1 (en) * | 1976-11-30 | 1978-12-29 | Via Gmbh | APPARATUS FOR DRYING BY COLD GAS, IN PARTICULAR COMPRESSED AIR |
EP0098446A2 (en) * | 1982-07-01 | 1984-01-18 | BASF Aktiengesellschaft | Heat exchanger |
EP0098446A3 (en) * | 1982-07-01 | 1985-01-30 | Basf Aktiengesellschaft | Heat exchanger |
US5215144A (en) * | 1991-02-18 | 1993-06-01 | Siemens Aktiengesellschaft | Heat exchanger |
DE4404068C1 (en) * | 1994-02-09 | 1995-08-17 | Wolfgang Engelhardt | Heat exchanger |
US5826647A (en) * | 1994-02-09 | 1998-10-27 | Wolfgang Engelhardt | Heat exchanger |
EP0932009A2 (en) * | 1998-01-22 | 1999-07-28 | Robert Bosch Gmbh | Heat exchanger for fuel-heated water heater, more particularly for condensing boiler |
EP0932009A3 (en) * | 1998-01-22 | 2000-07-05 | Robert Bosch Gmbh | Heat exchanger for fuel-heated water heater, more particularly for condensing boiler |
WO2001059385A1 (en) * | 2000-02-08 | 2001-08-16 | Hackman Wedholms Ab | A heat exchanger and use thereof |
RU2493526C2 (en) * | 2008-10-20 | 2013-09-20 | Эбнер Индустриофенбау Гезелльшафт М.Б.Х. | Heat-exchanger of annealing furnace for heat exchange between two fluid media |
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