EP0280612A1 - Tubular heat exchangers with internal turbulator - Google Patents

Tubular heat exchangers with internal turbulator Download PDF

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Publication number
EP0280612A1
EP0280612A1 EP88400337A EP88400337A EP0280612A1 EP 0280612 A1 EP0280612 A1 EP 0280612A1 EP 88400337 A EP88400337 A EP 88400337A EP 88400337 A EP88400337 A EP 88400337A EP 0280612 A1 EP0280612 A1 EP 0280612A1
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EP
European Patent Office
Prior art keywords
heat exchanger
tubes
disturbance
exchanger according
tube
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Withdrawn
Application number
EP88400337A
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German (de)
French (fr)
Inventor
Gilbert-Gustave Lelièvre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Chausson Thermique SA
Original Assignee
Valeo Chausson Thermique SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Chausson Thermique SA filed Critical Valeo Chausson Thermique SA
Publication of EP0280612A1 publication Critical patent/EP0280612A1/en
Withdrawn legal-status Critical Current

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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
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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
    • F28F1/405—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 and being formed of wires

Definitions

  • the invention relates to heat exchangers with a tube bundle, that is to say exchangers, the tubes of which open into at least one header plate.
  • Exchangers of this nature are used in various fields of technology and in particular for cooling the circulation fluid of heat engines and for heating the passenger compartment of motor vehicles.
  • the disturbers used are most often shaped as a helix and it has appeared that the flow of the fluid in the tubes causes displacements of the disturbers, which causes abrasion of the tubes and sometimes perforations thereof.
  • the present invention creates a new exchanger in which the disturber arranged in the tubes occupies a fixed position relative to the wall of the tube which contains it and it can in no case be moved by the circulating liquid. In this way, the risks of mechanical abrasion inside the tube are eliminated.
  • the tube bundle heat exchanger comprising tubes opening into at least one collector plate, said tubes containing an internal disturbance, is characterized in that the initial external width of the turns of the disturbance is greater than the internal diameter tubes so that each disruptor is elastically deformed and exerts pressure against the internal wall of the tube which contains it when it is placed in it.
  • the heat exchanger shown in the drawing comprises tubes 1 which can have the shape of a pin or be straight depending on whether the exchanger comprises one or more collector plates.
  • the ends of the tubes 1 are engaged in a collecting plate 2, itself covered by a water box 3.
  • the water box 3 comprises a central partition 4 delimiting two chambers 5 and 6 which communicate with end fittings 7 and 8 for respectively supplying the discharge of the liquid which must circulate in the tubes 1.
  • the tubes 1 are provided with heat sinks 9 constituted, for example, by fins.
  • disturbers 10 are arranged in the tubes 1 or each of the two rectilinear sections of the tubes 1 when the latter are bent into pins.
  • the disturbers 10 are produced by a wire, preferably wound in a helix and according to the invention, the diameter ⁇ 1 of the turns of the propeller is larger than the inside diameter ⁇ of the tubes 1.
  • each disturber 10 is folded back to form a finger 11 extending towards the inside of the terminal turn, for example in a radial direction.
  • a rod 12 forming a mandrel is advantageously used which is engaged inside the turns to come to bear against the finger 11.
  • the rod 12 is then moved along the arrow F1, which has the effect of gradually introducing the first turn, the external generator of which bears against the inner wall of the tube 1.
  • the turns of the disturber 10 are elastically deformed, that is to say that the pitch of the turns increases to a sufficient extent so that said turns can slide at inside the tube 1.
  • the pressure exerted by the disturber inside the tube means that it cannot be moved by the circulating liquid despite the disturbed flow of this liquid.
  • the disturber 10 described in the foregoing is preferably made from a wire of circular section made of metal which is a good heat conductor, for example aluminum. It would not be departing from the scope of the invention to produce the disturber from a wire having a polygonal shape in section, for example that of a triangle, the base of which would press against the internal wall of the tube.
  • the disturber other than metal, for example plastic or elastomer.
  • FIG. 5 illustrates a variant according to which the disturber is not wound in a helix but is shaped in a zigzag.
  • the initial width of the successive turns is, as in the previous example, greater than the internal diameter of the tube 1 so that the disturber is slightly deformed during its engagement so that the elbows 13 are tightened elastically against the internal wall of the tube.
  • one end of the perforator forms a finger 11 deviating from the internal wall of the tube.
  • the establishment of disruptor is carried out as previously by means of a rod, but this is split over its entire length to overlap it and to bear only on finger 11.

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  • 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)

Abstract

The heat exchanger consists of tubes (1) opening into at least one end plate (2) and containing an internal turbulator (10). The initial width of the turns of the turbulator is greater than the inner diameter of the tubes (1) so that each turbulator is elastically deformed and exerts a pressure on the inner wall of the tube containing it when inserted into it. <IMAGE>

Description

L'invention est relative aux échangeurs de chaleur à faisceau tubulaire c'est-à-dire aux échangeurs dont les tubes débouchent dans au moins une plaque collectrice.The invention relates to heat exchangers with a tube bundle, that is to say exchangers, the tubes of which open into at least one header plate.

Des échangeurs de cette nature sont utilisés dans différents domaines de la technique et en particu­lier pour le refroidissement du fluide de circulation des moteurs thermiques et pour le chauffage de l'habitacle des véhicules automobiles.Exchangers of this nature are used in various fields of technology and in particular for cooling the circulation fluid of heat engines and for heating the passenger compartment of motor vehicles.

La technique antérieure a enseigné qu'il était avantageux d'insérer des perturbateurs dans les tubes lorsque ceux-ci sont de forme cylindrique. En effet, dans ce cas, il est important que l'écoulement soit perturbé à l'intérieur des tubes étant donné qu'un écoulement laminaire ne peut pas être produit comme cela est réalisé dans des tubes de section rectangulaire ou sensiblement rectangulaire.The prior art has taught that it is advantageous to insert disturbers in the tubes when the latter are cylindrical in shape. Indeed, in this case, it is important that the flow is disturbed inside the tubes since a laminar flow cannot be produced as is achieved in tubes of rectangular or substantially rectangular section.

Les perturbateurs utilisés sont le plus souvent conformés en hélice et il est apparu que l'écoulement du fluide dans les tubes provoque des déplacements des perturbateurs, ce qui engendre une abrasion des tubes et quelquefois des perforations de ceux-ci.The disturbers used are most often shaped as a helix and it has appeared that the flow of the fluid in the tubes causes displacements of the disturbers, which causes abrasion of the tubes and sometimes perforations thereof.

Le risque de perforation est particulièrement grand lorsque les perturbateurs sont disposés dans des tubes coudés en épingle. En effet, l'extrémité du pertur­bateur qui se trouve à la naissance du coude forme une arête particulièrement abrasive lorsque le perturbateur est déplacé par le liquide en circulation.The risk of perforation is particularly great when the disturbers are arranged in bent pin tubes. Indeed, the end of the disturbance which is at the birth of the elbow forms a particularly abrasive edge when the disturbance is displaced by the circulating liquid.

La présente invention crée un nouvel échangeur dans lequel le perturbateur disposé dans les tubes occupe une position fixe par rapport à la paroi du tube qui le contient et il ne peut en aucun cas être déplacé par le liquide en circulation. De cette façon, les risques d'abrasion mécanique à l'intérieur du tube sont suppri­més.The present invention creates a new exchanger in which the disturber arranged in the tubes occupies a fixed position relative to the wall of the tube which contains it and it can in no case be moved by the circulating liquid. In this way, the risks of mechanical abrasion inside the tube are eliminated.

Conformément à l'invention, l'échangeur de chaleur à faisceau tubulaire comportant des tubes débou­chant dans au moins une plaque collectrice, lesdits tubes contenant un perturbateur interne, est caractérisé en ce que la largeur extérieure initiale des spires du pertur­bateur est supérieure au diamètre interne des tubes de façon que chaque perturbateur soit déformé élastiquement et exerce une pression contre la paroi interne du tube qui le contient lorsqu'il est mis en place dans celui-ci.According to the invention, the tube bundle heat exchanger comprising tubes opening into at least one collector plate, said tubes containing an internal disturbance, is characterized in that the initial external width of the turns of the disturbance is greater than the internal diameter tubes so that each disruptor is elastically deformed and exerts pressure against the internal wall of the tube which contains it when it is placed in it.

Diverses autres caractéristiques de l'invention ressortent d'ailleurs de la description détaillée qui suit.Various other characteristics of the invention will also emerge from the detailed description which follows.

Des formes de réalisation de l'invention sont représentées, à titre d'exemples non limitatifs, au dessin annexé.

  • La figure 1 est une élévation, en partie arra­chée, d'un échangeur de chaleur mettant en oeuvre l'inv­ention.
  • La figure 2 est une coupe-élévation partielle, à plus grande échelle, d'un tube muni d'un perturbateur réalisé selon l'invention.
  • La figure 3 est une coupe prise sensiblement suivant la ligne III-III de la figure 2.
  • La figure 4 est une élévation partielle éclatée d'un tronçon de tube et d'un tronçon de perturbateur conformes à l'invention.
  • La figure 5 est une coupe élévation partielle illustrant une variante.
Embodiments of the invention are shown, by way of nonlimiting examples, in the accompanying drawing.
  • Figure 1 is an elevation, partially broken away, of a heat exchanger implementing the invention.
  • Figure 2 is a partial sectional elevation, on a larger scale, of a tube provided with a disturbance produced according to the invention.
  • FIG. 3 is a section taken substantially along line III-III of FIG. 2.
  • Figure 4 is a partial exploded elevation of a tube section and a disturbance section according to the invention.
  • Figure 5 is a partial elevational section illustrating a variant.

L'échangeur de chaleur représenté au dessin comporte des tubes 1 qui peuvent présenter la forme d'épingle ou être rectilignes selon que l'échangeur comporte une ou plusieurs plaques collectrices.The heat exchanger shown in the drawing comprises tubes 1 which can have the shape of a pin or be straight depending on whether the exchanger comprises one or more collector plates.

Les extrémités des tubes 1 sont engagées dans une plaque collectrice 2, elle-même recouverte par une boîte à eau 3.The ends of the tubes 1 are engaged in a collecting plate 2, itself covered by a water box 3.

De manière connue, lorsque les tubes 1 sont conformés en épingle, la boîte à eau 3 comporte une cloison médiane 4 délimitant deux chambres 5 et 6 qui communiquent avec des embouts 7 et 8 pour l'amenée respectivement l'évacuation du liquide devant circuler dans les tubes 1.In known manner, when the tubes 1 are in the form of a pin, the water box 3 comprises a central partition 4 delimiting two chambers 5 and 6 which communicate with end fittings 7 and 8 for respectively supplying the discharge of the liquid which must circulate in the tubes 1.

Egalement de façon connue, les tubes 1 sont munis de dissipateurs de chaleur 9 constitués, par exemple, par des ailettes. Pour améliorer encore l'échange thermique, des perturbateurs 10 sont disposés dans les tubes 1 ou chacun des deux tronçons rectilignes des tubes 1 lorsque ceux-ci sont pliés en épingles.Also in a known manner, the tubes 1 are provided with heat sinks 9 constituted, for example, by fins. To further improve the heat exchange, disturbers 10 are arranged in the tubes 1 or each of the two rectilinear sections of the tubes 1 when the latter are bent into pins.

Les perturbateurs 10 sont réalisés par un fil, de préférence, enroulé en hélice et selon l'invention, le diamètre ⌀1 des spires de l'hélice est plus grand que le diamètre ⌀ intérieur des tubes 1.The disturbers 10 are produced by a wire, preferably wound in a helix and according to the invention, the diameter ⌀1 of the turns of the propeller is larger than the inside diameter ⌀ of the tubes 1.

Une extrémité de chaque perturbateur 10 est repliée pour former un doigt 11 s'étendant vers l'in­térieur de la spire terminale, par exemple dans une direction radiale.One end of each disturber 10 is folded back to form a finger 11 extending towards the inside of the terminal turn, for example in a radial direction.

Pour mettre un perturbateur en place dans un tube 1, on utilise avantageusement une tige 12 formant mandrin qui est engagée à l'intérieur des spires pour venir prendre appui contre le doigt 11.To put a disturber in place in a tube 1, a rod 12 forming a mandrel is advantageously used which is engaged inside the turns to come to bear against the finger 11.

La tige 12 est ensuite déplacée suivant la flèche F₁ ce qui a pour effet d'introduire progressive­ment la première spire dont la génératrice externe prend appui contre la paroi intene du tube 1.The rod 12 is then moved along the arrow F₁, which has the effect of gradually introducing the first turn, the external generator of which bears against the inner wall of the tube 1.

Etant donné que le diamètre ⌀ 1 est supérieur au diamètre ⌀ du tube, les spires du perturbateur 10 sont déformées élastiquement c'est-à-dire que le pas des spires croît jusqu'à une mesure suffisante pour que lesdites spires puissent glisser à l'intérieur du tube 1.Since the diameter ⌀ 1 is greater than the diameter ⌀ of the tube, the turns of the disturber 10 are elastically deformed, that is to say that the pitch of the turns increases to a sufficient extent so that said turns can slide at inside the tube 1.

Lorsque le perturbateur est engagé complètement dans un tube 1 et libéré, sa longueur est légèrement augmentée par rapport à celle qu'il présentait initiale­ment au repos et il en résulte que la génératrice exté­rieure de chaque spire est serrée élastiquement contre la paroi interne du tube.When the disturber is fully engaged in a tube 1 and released, its length is slightly increased compared to that which it initially presented at rest and it follows that the external generator of each turn is tightened elastically against the internal wall of the tube.

La pression qu'exerce le perturbateur à l'in­térieur du tube fait qu'il ne peut pas être déplacé par le liquide en circulation malgré l'écoulement perturbé de ce liquide.The pressure exerted by the disturber inside the tube means that it cannot be moved by the circulating liquid despite the disturbed flow of this liquid.

En outre, l'extrémité du perturbateur présentant le doigt 11 se trouvant au niveau de l'amorce du coude que présente le tube 1 en forme d'épingle, il s'ensuit que la paroi du tube ne peut pas être en contact avec une partie vive du perturbateur et, par conséquent, les risques d'abrasion du tube sont éliminés.In addition, the end of the disruptor having the finger 11 being at the level of the elbow primer presented by the pin-shaped tube 1, it follows that the wall of the tube cannot be in contact with a living part of the disruptor and, consequently, the risks of abrasion of the tube are eliminated.

Le perturbateur 10 décrit dans ce qui précède est de préférence réalisé à partir d'un fil de section circulaire en métal bon conducteur de chaleur, par exemple en aluminium. On ne sortirait pas du cadre de l'invention en réalisant le perturbateur à partir d'un fil présentant une forme polygonale en section par exemple celle d'un triangle dont la base appuirait contre la paroi interne du tube.The disturber 10 described in the foregoing is preferably made from a wire of circular section made of metal which is a good heat conductor, for example aluminum. It would not be departing from the scope of the invention to produce the disturber from a wire having a polygonal shape in section, for example that of a triangle, the base of which would press against the internal wall of the tube.

De même il est possible de réaliser le perturba­teur autrement qu'en métal par exemple en matière plasti­que ou en élastomère.Similarly, it is possible to produce the disturber other than metal, for example plastic or elastomer.

La figure 5 illustre une variante selon laquelle le perturbateur n'est pas enroulé en hélice mais est conformé en zigzag. Dans ce cas, la largeur initiale des spires successives est, comme dans l'exemple précédent, supérieure au diamètre interne du tube 1 de sorte que le perturbateur est légèrement déformé lors de son engage­ment pour que les coudes 13 soient serrés élastiquement contre la paroi interne du tube. Comme précédemmant, une extrémité du perforateur forme un doigt 11 s'écartant de la paroi interne du tube. La mise en place du perturbateur est effectuée comme précédemment au moyen d'une tige mais celle-ci est fendue sur toute sa longueur paour le chevaucher et ne prendre appui que sur le doigt 11.FIG. 5 illustrates a variant according to which the disturber is not wound in a helix but is shaped in a zigzag. In this case, the initial width of the successive turns is, as in the previous example, greater than the internal diameter of the tube 1 so that the disturber is slightly deformed during its engagement so that the elbows 13 are tightened elastically against the internal wall of the tube. As before, one end of the perforator forms a finger 11 deviating from the internal wall of the tube. The establishment of disruptor is carried out as previously by means of a rod, but this is split over its entire length to overlap it and to bear only on finger 11.

L'invention n'est pas limitée aux exemples de réalisation représentés et décrits en détail car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the embodiments shown and described in detail since various modifications can be made thereto without departing from its scope.

Claims (9)

1 - Echangeur de chaleur à faisceau tubulaire comportant des tubes (1) débouchant dans au moins une plaque collectrice (2), lesdits tubes (1) contenant un perturbateur interne (10), caractérisé en ce que la largeur initiale des spires du perturbateur est supé­rieure au diamètre interne des tubes (1) de façon que chaque perturbateur soit déformé élastiquement et exerce une pression contre la paroi interne du tube qui le contient lorsqu'il est mis en place dans celui-ci.1 - Tube bundle heat exchanger comprising tubes (1) opening into at least one collecting plate (2), said tubes (1) containing an internal disturbance (10), characterized in that the initial width of the turns of the disturbance is greater than the internal diameter of the tubes (1) so that each disruptor is elastically deformed and exerts pressure against the internal wall of the tube which contains it when it is placed in it. 2 - Echangeur de chaleur suivant la revendica­tion 1, caractérisé en ce que l'une des extrémités de chaque perturbateur (10) est repliée vers l'intérieur de la dernière spire pour former un doigt (11) s'écartant de la paroi du tube.2 - Heat exchanger according to claim 1, characterized in that one of the ends of each disturbance (10) is folded inwardly of the last turn to form a finger (11) deviating from the wall of the tube . 3 - Echangeur de chaleur suivant l'une des revendications 1 et 2, caractérisé en ce que le doigt (11) s'étend dans une direction sensiblement radiale.3 - Heat exchanger according to one of claims 1 and 2, characterized in that the finger (11) extends in a substantially radial direction. 4 - Echangeur de chaleur suivant l'une des revendications 1 à 3, caractérisé en ce que perturbateur est réalisé à partir d'un fil enroulé en hélice.4 - Heat exchanger according to one of claims 1 to 3, characterized in that the disturbance is made from a wire wound in a helix. 5 - Echangeur de chaleur suivant l'une des revendications 1 à 4, caractérisé en ce que le perturba­teur est réalisé en métal.5 - Heat exchanger according to one of claims 1 to 4, characterized in that the disturbance is made of metal. 6 - Echangeur de chaleur suivant l'une des revendications 1 à 4, caractérisé en ce que le perturba­teur est réalisé en matière plastique ou en élastomère.6 - Heat exchanger according to one of claims 1 to 4, characterized in that the disturbance is made of plastic or elastomer. 7 - Echangeur de chaleur suivant l'une des revendications 1 à 6, caractérisé en ce que le fil constituant le perturbateur présente indifféremment une section ronde ou polygonale.7 - Heat exchanger according to one of claims 1 to 6, characterized in that the wire constituting the disturber has either a round or polygonal section. 8 - Echangeur de chaleur suivant l'une des revendications 1 à 7, caractérisé en ce qu'il comporte des tubes pliés en épingle, la partie du perturbateur (10) formant le doigt (11) étant disposée au niveau de l'amorce du coude que forment lesdits tubes (1).8 - Heat exchanger according to one of claims 1 to 7, characterized in that it comprises tubes bent into a pin, the part of the disturber (10) forming the finger (11) being disposed at the level of the start of the elbow formed by said tubes (1). 9 - Echangeur de chaleur suivant l'une des revendications 1 à 8, caractérisé en ce que le perturba­teur est conformé en zigzag.9 - Heat exchanger according to one of claims 1 to 8, characterized in that the disturbance is shaped in a zigzag.
EP88400337A 1987-02-23 1988-02-16 Tubular heat exchangers with internal turbulator Withdrawn EP0280612A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8702320A FR2611879B1 (en) 1987-02-23 1987-02-23 HEAT EXCHANGER WITH TUBE BEAM AND INTERNAL DISTURBATOR
FR8702320 1987-02-23

Publications (1)

Publication Number Publication Date
EP0280612A1 true EP0280612A1 (en) 1988-08-31

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EP88400337A Withdrawn EP0280612A1 (en) 1987-02-23 1988-02-16 Tubular heat exchangers with internal turbulator

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EP (1) EP0280612A1 (en)
FR (1) FR2611879B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0661511A1 (en) * 1993-12-31 1995-07-05 Hoechst Aktiengesellschaft Heat exchanger tube with insert element
FR2720020A1 (en) * 1994-05-19 1995-11-24 Behr Gmbh & Co A method of manufacturing and assembling wire spiral turbulence generators in heat exchanger tubes and apparatus for carrying out the method.
DE102008051812A1 (en) * 2008-10-15 2010-04-29 Gea Air Treatment Gmbh Heat exchanger for transmission of heat energy from medium to another medium, has inserts provided in inner space of pipe for reducing pipe cross section and increasing flow speed of media, and extended over part of pipe length
WO2010069461A1 (en) * 2008-12-19 2010-06-24 Haldor Topsøe A/S Support for a helical coil inserted in a heat exchanger tube
WO2019055390A1 (en) * 2017-09-13 2019-03-21 Carrier Corporation Helical insert for shell and tube heat exchanger background

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916779C2 (en) * 1988-09-30 1998-04-09 Valeo Sistemi Termici S P A Heat exchanger, in particular for the heating system of a motor vehicle
FR2787564B1 (en) * 1998-12-22 2001-03-02 Total Raffinage Distribution IMPROVEMENTS TO THE HEAT EXCHANGER TUBES, IN ORDER TO AVOID THE BLOCKING OF THEIR ENTRY BY SUSPENSION MATERIALS

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR771161A (en) * 1933-04-10 1934-10-02 Improvements to heat transmission tubes
FR2145393A1 (en) * 1971-07-12 1973-02-23 Chaffoteaux Et Maury
FR2340526A1 (en) * 1976-02-09 1977-09-02 Smick Ronald CHICANE FOR HEAT EXCHANGER DUCT SUCH AS A SMOKE TUBE
FR2436959A1 (en) * 1978-09-19 1980-04-18 Ferodo Sa Helical insert for heat exchanger tubes - has S=shaped cross=section with reinforced core to create turbulent flow
EP0122746A1 (en) * 1983-04-04 1984-10-24 Modine Manufacturing Company Mixed helix turbulator for heat exchangers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR771161A (en) * 1933-04-10 1934-10-02 Improvements to heat transmission tubes
FR2145393A1 (en) * 1971-07-12 1973-02-23 Chaffoteaux Et Maury
FR2340526A1 (en) * 1976-02-09 1977-09-02 Smick Ronald CHICANE FOR HEAT EXCHANGER DUCT SUCH AS A SMOKE TUBE
FR2436959A1 (en) * 1978-09-19 1980-04-18 Ferodo Sa Helical insert for heat exchanger tubes - has S=shaped cross=section with reinforced core to create turbulent flow
EP0122746A1 (en) * 1983-04-04 1984-10-24 Modine Manufacturing Company Mixed helix turbulator for heat exchangers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0661511A1 (en) * 1993-12-31 1995-07-05 Hoechst Aktiengesellschaft Heat exchanger tube with insert element
FR2720020A1 (en) * 1994-05-19 1995-11-24 Behr Gmbh & Co A method of manufacturing and assembling wire spiral turbulence generators in heat exchanger tubes and apparatus for carrying out the method.
DE102008051812A1 (en) * 2008-10-15 2010-04-29 Gea Air Treatment Gmbh Heat exchanger for transmission of heat energy from medium to another medium, has inserts provided in inner space of pipe for reducing pipe cross section and increasing flow speed of media, and extended over part of pipe length
WO2010069461A1 (en) * 2008-12-19 2010-06-24 Haldor Topsøe A/S Support for a helical coil inserted in a heat exchanger tube
US9863724B2 (en) 2008-12-19 2018-01-09 Haldor Topsoe A/S Support for a helical coil inserted in a heat exchanger tube
WO2019055390A1 (en) * 2017-09-13 2019-03-21 Carrier Corporation Helical insert for shell and tube heat exchanger background

Also Published As

Publication number Publication date
FR2611879B1 (en) 1990-06-22
FR2611879A1 (en) 1988-09-09

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