FR2539499A1 - Tubes with micro-gills - Google Patents
Tubes with micro-gills Download PDFInfo
- Publication number
- FR2539499A1 FR2539499A1 FR8300526A FR8300526A FR2539499A1 FR 2539499 A1 FR2539499 A1 FR 2539499A1 FR 8300526 A FR8300526 A FR 8300526A FR 8300526 A FR8300526 A FR 8300526A FR 2539499 A1 FR2539499 A1 FR 2539499A1
- Authority
- FR
- France
- Prior art keywords
- tubes
- micro
- tube
- exchange surface
- exchangers
- 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- Withdrawn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
- F28F1/42—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
-
- 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
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
La présente invention a pour objet d'augmenter la surface d'échange des tubes utilisés potr la fabrication des
échangeurs dits à tubes lisses tout en ne modifiant pas la
conception ni la fabrication de ces échangeurs.The object of the present invention is to increase the exchange surface of the tubes used for the manufacture of
so-called smooth tube exchangers while not modifying the
neither design nor manufacture of these exchangers.
Les tubes utilisés actuellement pour la réalisation de
ce type d'échangeur sont des tubes ronds sans aucune ner
vure ni ailette et pour ces tubes la surface d'échange est
égale à son périmètre multiplié par sa longueur.The tubes currently used for the realization of
this type of exchanger are round tubes without any ner
vure nor fin and for these tubes the exchange surface is
equal to its perimeter multiplied by its length.
Le but de l'invention est d'augmenter cette surface
d'échange dans un; proportion"no'n négligeable mais sans modifier la conception ni la fabrication de ces échangeurs.The object of the invention is to increase this surface
exchange in one; proportion "no'n negligible but without modifying the design or the manufacture of these exchangers.
Les tubes objet de l'invention se caractérisent des tubes utilisés actuellement par ce qu'ils comportent sur leur pourtour, à l'intérieur, a l'extérieur, ou sur les deux, des micro nervures ou mi'cr'o 'ailettes t'comme repré
senté sur les fig. t et 2, permettant d'augmenter le périmètre de ces tubes et donc la surface d'échange pour une même longueur (ou réduire la longueur pour une même
surface). Ces micro nervures 1 n'étant pas trop profondes pour ne pas réduire trop l'épaisseur du tube et permettre de conserver ltentr'axe des trous sur les plaques tubulaires des échangeurs conçus avec ces tubes.The tubes which are the subject of the invention are characterized by the tubes currently used by what they have on their periphery, inside, outside, or on both, micro ribs or mi'cr'o 'fins t '' as shown
felt in figs. t and 2, making it possible to increase the perimeter of these tubes and therefore the exchange surface for the same length (or reduce the length for the same
area). These micro ribs 1 are not too deep so as not to reduce the thickness of the tube too much and allow the center of the holes to be kept on the tube plates of the exchangers designed with these tubes.
Dans l'exemple choisi (voir croquis fig. 1 et 2, la figure 2 étant un grossissement de 5 fois environ) - les micro nervures 1 pouvant avoir n'importe quelle forme - la surface d'échange pour une même longueur est augmentée de 45 % quel que soit le rayon R. des micro nervures 1. In the example chosen (see sketch fig. 1 and 2, figure 2 being a magnification of approximately 5 times) - the micro ribs 1 can have any shape - the exchange surface for the same length is increased by 45% whatever the radius R. of the micro ribs 1.
Ces micro nervures t peuvent être réalisées lors de l'étirage des tubes soit à chaud soit à froid par l'intermédiaire d'une filière. These micro ribs t can be produced during the stretching of the tubes either hot or cold via a die.
Pour augmenter encore plus la surface d'échange de ces
tubes, il est possible lors de l'étirage de ceux-ci dans
la filière, de faire tourner ces tubes (ou la filière) en même temps que celui-ci avance, ce qui aura pour effet de
donner une forme d'hélice aux micro nervures 1 et, de ce'
fait, augmenter la longueur des micro nervures 1, donc la
surface d'échange (voir fig. 3). To further increase the exchange surface of these
tubes it is possible when stretching these in
the die, to rotate these tubes (or the die) at the same time as it advances, which will have the effect of
to give a shape of helix to the micro-ribs 1 and, from this
done, increase the length of the micro ribs 1, so the
exchange surface (see fig. 3).
Ces tubes auront une surface d'échange de plus de 50 % supérieure (avec des nervures 1 comme représentées sur croquis 1 et 2) à des tubes lisses de mêmes diamètres. These tubes will have an exchange surface of more than 50% greater (with ribs 1 as shown in sketches 1 and 2) than smooth tubes of the same diameters.
L'avantage de ces micro nervures 1 par rapport à des nervures ou ailettes de plus grandes dimensions est qu'elles ne modifient pas la conception des échangeurs; en effet, ces tubes peuvent remplacer les tubes actuellement utilisés dans les échangeurs soudés, le métal d'apport de la soudure bouchant les trous formés par les micro nervures 1 entre le tube et la plaque tubulaire et également pour les serpentins. The advantage of these micro ribs 1 compared to ribs or fins of larger dimensions is that they do not modify the design of the exchangers; in fact, these tubes can replace the tubes currently used in welded exchangers, the weld filler metal plugging the holes formed by the micro-ribs 1 between the tube and the tube plate and also for the coils.
Ces tubes peuvent être utilisés dans tous les cas en remplacement ,des tubes ronds.actuellement utilisés pour la fabrication des échangeur.s dits à tubes lisses, ils permet- tent de réduire l'encombrement, donc le coût de ces échan- geurs, pour une même surface d'échange ou en remplacement de tubes lisses de même longueur pour augmenter la surface sans en modifier r la conception. These tubes can be used in all cases as a replacement for round tubes, currently used for the manufacture of exchangers, known as with smooth tubes, they make it possible to reduce the size, and therefore the cost of these exchangers, for the same exchange surface or to replace smooth tubes of the same length to increase the surface without modifying the design.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8300526A FR2539499A1 (en) | 1983-01-14 | 1983-01-14 | Tubes with micro-gills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8300526A FR2539499A1 (en) | 1983-01-14 | 1983-01-14 | Tubes with micro-gills |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2539499A1 true FR2539499A1 (en) | 1984-07-20 |
Family
ID=9284941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8300526A Withdrawn FR2539499A1 (en) | 1983-01-14 | 1983-01-14 | Tubes with micro-gills |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2539499A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0819908A3 (en) * | 1996-07-19 | 1999-06-09 | Alcan Alluminio S.p.A. | Rolled section for the realization of heat exchangers and relevant production method |
-
1983
- 1983-01-14 FR FR8300526A patent/FR2539499A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0819908A3 (en) * | 1996-07-19 | 1999-06-09 | Alcan Alluminio S.p.A. | Rolled section for the realization of heat exchangers and relevant production method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |