EP0301121B1 - Tube à ailettes - Google Patents

Tube à ailettes Download PDF

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Publication number
EP0301121B1
EP0301121B1 EP19870111019 EP87111019A EP0301121B1 EP 0301121 B1 EP0301121 B1 EP 0301121B1 EP 19870111019 EP19870111019 EP 19870111019 EP 87111019 A EP87111019 A EP 87111019A EP 0301121 B1 EP0301121 B1 EP 0301121B1
Authority
EP
European Patent Office
Prior art keywords
finned tube
fin
tube according
range
finned
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
Application number
EP19870111019
Other languages
German (de)
English (en)
Other versions
EP0301121A1 (fr
Inventor
Manfred Dr.-Ing. Hage
Manfred Dipl.-Ing. Knab
Karl Dipl.-Ing. Noll
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.)
Wieland Werke AG
Original Assignee
Wieland Werke AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8197168&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0301121(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wieland Werke AG filed Critical Wieland Werke AG
Priority to DE8787111019T priority Critical patent/DE3762920D1/de
Priority to EP19870111019 priority patent/EP0301121B1/fr
Publication of EP0301121A1 publication Critical patent/EP0301121A1/fr
Application granted granted Critical
Publication of EP0301121B1 publication Critical patent/EP0301121B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/26—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being integral with the element
    • 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
    • F28D7/16—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 in parallel spaced relation
    • 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
    • F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features

Definitions

  • the invention relates to a finned tube according to the preamble of claim 1.
  • Finned tubes of this type with a fin height h R of about 10 mm are used in particular in air-cooled heat exchangers.
  • a relatively small fin pitch t R ⁇ 1.34 mm (at least 19 finned inches) is assigned a relatively small fin height h R of 0.8 to 1.25 mm.
  • the invention has for its object to provide a finned tube that retains good heat transfer properties even when used in corrosive, erosive and contaminated media.
  • the object is achieved by the characterizing features a) and b) of claim 1 (the rib cross-sectional area A R is measured in the longitudinal direction of the tube).
  • the rib height h R is preferably in the range 0.8 mm ⁇ h R ⁇ 1.7 mm, in particular in the range 1.0 mm ⁇ h R ⁇ 1.5 mm.
  • the values for the surface ratio of the corrugated outer surface Ao / smooth outer surface Ao, smooth as a function of the rib pitch t R lie between the values of the equations.
  • the smooth tube has an outer diameter which corresponds to the fin diameter of the finned tube.
  • a rib width B> 0.3 mm at the tip of the rib is preferred.
  • the finned tube For use in shell and tube heat exchangers, it is recommended that the finned tube have smooth ends, the diameter of which roughly corresponds to the fin diameter.
  • the finned tube in corrosive or erosive media, it preferably consists of a corrosion-resistant metallic material, such as steel, high-alloy steel or titanium.
  • finned tube according to the invention for heat exchangers for condensation and evaporation as well as heat transfer without phase change (on the tube outside) of corrosive and erosive substances which have a critical pressure p crit ⁇ 200 bar is preferred. Because of the favorable surface area, these finned tubes are also ideally suited for use in contaminated process streams.
  • Particularly suitable substances of this type are hydrocarbon mixtures from chemistry or petrochemicals, for example ethylene / propylene, n-pentane / para-xylene.
  • Fig. 3 shows a finned tube 1 with integral fins 2, which run helically around the outside of the tube.
  • the finned tubes 1 are produced in a manner known per se by the finned tube rolling method (cf. for example US Pat. No. 3,327,512).
  • FIG. 4 clearly shows, the ribs 2 taper towards the tip of the rib, the bottom of the groove between the ribs 2 is rounded.
  • rib pitch t R distance from rib center to rib center
  • rib height h R rib cross-sectional area A R (hatched in Fig. 4)
  • rib width B at the rib tip radius R in the groove base
  • Rib diameter d R inside diameter of the tube (in the finned part) di.
  • the finned tube 1 has a smooth end 1 ', the diameter of which corresponds to the fin diameter d R.
  • condensation performance of the condenser equipped with finned tubes according to the invention was at least a factor 2 higher than the condensation performance of the condenser provided with standard finned tubes.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (13)

1. Tube à ailettes (1), en particulier pour échangeurs de chaleur ou dispositifs semblables, possédant des ailettes (2) qui sont d'un seul tenant avec le tube, s'étendent en hélice ou en anneau autour du tube, sur le côté extérieur de celui-ci, et sont décrites par les grandeurs que sont le pas tR des ailettes, la hauteur hR des ailettes et l'aire de section AR des ailettes, le pas tR étant compris entre 1,60 et 3,90 mm (6,5 à 16 ailettes/pouce), le rapport aire de section AR/hauteur hR des ailettes correspondant à AR/hR 0,5 mm, caractérisé en ce que:
a) la hauteur hR des ailettes est comprise dans la plage suivante: 0,2 mm < hR < 2,0 mm;
b) le rapport pas tR/hauteur hR des ailettes est compris dans la plage suivante: 1 < tR/hR < 15.
2. Tube selon la revendication 1, caractérisé en ce que la hauteur hR des ailettes est comprise dans la plage 0,8 mm < hR < 1,7 mm.
3. Tube selon la revendication 2, caractérisé en ce que la hauteur hR des ailettes est comprise dans la plage 1,0 mm < hR < 1,5 mm.
4. Tube selon une ou plusieurs des revendications 1 à 3, caractérisé en ce que le rapport tR/hR est compris dans la plage 1,2 < tR/hR < 5.
5. Tube selon la revendication 4, caractérisé en ce que le rapport tR/hR est compris dans la plage 1,3 < tR/hR < 3,2.
6. Tube selon une ou plusieurs des revendications 1 à 5, caractérisé en ce que les valeurs pour l'aire de section AR en fonction de la hauteur hR des ailettes, sont comprises entre les valeurs des équations AR = 0,5 mm · hR et AR = 0,7 mm2 + 1 mm · hR (figure 1).
7. Tube selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que les valeurs pour le rapport surface extérieure ailetée Ao/surface extérieure lisse Ao, lisse en fonction du pas tR des ailettes, sont comprises entre le valeurs des équations A0/A0, lisse = 1,05 et Ao/Ao, lisse = 1,49 + 0,214. (tR -3,97)2, tR étant notamment indiqué en mm (figure 2).
8. Tube selon une ou plusieurs des revendications 1 à 6, caractérisé en ce que les ailettes (2) se rétrécissent coniquement vers leur sommet.
9. Tube selon la revendication 8, caractérisé en ce que la largeur des ailettes B mesurée à leur sommet est supérieure à 0,3 mm.
10. Tube selon une ou plusieurs des revendications 1 à 9, caractérisé en ce qu'il présente des extrémités lisses (1') dont le diamètre correspond à peu près au diamètre de tube dR pris sur les ailettes.
11. Tube selon une ou plusieurs des revendications 1 à 10, caractérisé en ce qu'il est formé d'un matériau métallique qui résiste à la corrosion, par exemple d'acier, d'acier fortement allié ou du titane.
12. Utilisation d'un tube à ailettes selon une ou plusieurs des revendications 1 à 11 en tant qu'échangeur de chaleur pour la condensation, l'évaporation ou le transfert de chaleur sans changement de phase de substances corrosives et érosives qui ont une pression critique pcrit. < 200 bars.
13. Utilisation d'un tube à ailettes en tant qu'échangeur de chaleur pour mélanges d'hydrocarbures dans le but indiqué dans la revendication 12.
EP19870111019 1987-07-30 1987-07-30 Tube à ailettes Expired - Lifetime EP0301121B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8787111019T DE3762920D1 (de) 1987-07-30 1987-07-30 Rippenrohr.
EP19870111019 EP0301121B1 (fr) 1987-07-30 1987-07-30 Tube à ailettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870111019 EP0301121B1 (fr) 1987-07-30 1987-07-30 Tube à ailettes

Publications (2)

Publication Number Publication Date
EP0301121A1 EP0301121A1 (fr) 1989-02-01
EP0301121B1 true EP0301121B1 (fr) 1990-05-23

Family

ID=8197168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870111019 Expired - Lifetime EP0301121B1 (fr) 1987-07-30 1987-07-30 Tube à ailettes

Country Status (2)

Country Link
EP (1) EP0301121B1 (fr)
DE (1) DE3762920D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5832995A (en) * 1994-09-12 1998-11-10 Carrier Corporation Heat transfer tube
FR2756090A1 (fr) * 1996-11-19 1998-05-22 Transnucleaire Dispositif a cannelures pour le refroidissement exterieur de conteneurs pour matieres radioactives
US6298673B1 (en) * 2000-05-18 2001-10-09 Carrier Corporation Method of operating a refrigerated merchandiser system
WO2005068927A1 (fr) * 2004-01-07 2005-07-28 Dow Global Technologies Inc. Procede pour fabriquer un tube de transfert thermique
FR2872956B1 (fr) * 2004-07-12 2006-11-17 Cogema Logistics Sa Dispositif externe d'evacuation de chaleur pour emballage destine au stockage et/ou au transport de matieres nucleaires
US7128139B2 (en) * 2004-10-14 2006-10-31 Nova Chemicals (International) S.A. External ribbed furnace tubes
CN104810068A (zh) * 2014-01-26 2015-07-29 上海核工程研究设计院 一种外壁面带有翅片的压力容器
CN112303978A (zh) * 2019-07-30 2021-02-02 开利公司 制冷柜系统和制冷柜系统控制方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384154A (en) * 1956-08-30 1968-05-21 Union Carbide Corp Heat exchange system
US3600922A (en) * 1969-03-05 1971-08-24 Carrier Corp Manufacture of integrally finned tubing
DE2043459A1 (en) * 1970-09-02 1972-03-09 Battelle Institut E V Heat transfer tube - for steam condensation
DE2119345A1 (en) * 1971-04-21 1972-11-02 R. & G. Schmöle Metallwerke, 575OMenden Finned tube - fin dimensions ensure optimum heat conduction at minimum material usage
US3795125A (en) * 1972-01-27 1974-03-05 Universal Oil Prod Co High-fin integral finned tube of heat-resisting alloys, and multi-pass process for making the same
DE3269190D1 (en) * 1982-09-03 1986-03-27 Wieland Werke Ag Finned tube with internal projections and method and apparatus for its manufacture
CA1247592A (fr) * 1983-08-04 1988-12-28 James L. Cunningham Tubes a ailettes echangeurs de chaleur, et methode et dispositif de fabrication desdits tubes
US4546819A (en) * 1984-02-10 1985-10-15 Amtrol Inc. Double wall heat exchanger

Also Published As

Publication number Publication date
EP0301121A1 (fr) 1989-02-01
DE3762920D1 (de) 1990-06-28

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