EP2635868B1 - Dispositif permettant d'optimiser la transmission de chaleur dans un tuyau pour transporter des gaz d'échappement dans un appareil d'échange thermique - Google Patents

Dispositif permettant d'optimiser la transmission de chaleur dans un tuyau pour transporter des gaz d'échappement dans un appareil d'échange thermique Download PDF

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Publication number
EP2635868B1
EP2635868B1 EP11740624.9A EP11740624A EP2635868B1 EP 2635868 B1 EP2635868 B1 EP 2635868B1 EP 11740624 A EP11740624 A EP 11740624A EP 2635868 B1 EP2635868 B1 EP 2635868B1
Authority
EP
European Patent Office
Prior art keywords
pipe
heat
exhaust gases
fins
central core
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.)
Active
Application number
EP11740624.9A
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German (de)
English (en)
Other versions
EP2635868A1 (fr
Inventor
Valentino Iori
Giuseppe De Santi
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.)
Unical AG SpA
Original Assignee
Unical AG SpA
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Publication date
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Priority to PL11740624T priority Critical patent/PL2635868T3/pl
Publication of EP2635868A1 publication Critical patent/EP2635868A1/fr
Application granted granted Critical
Publication of EP2635868B1 publication Critical patent/EP2635868B1/fr
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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
    • 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
    • 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

Definitions

  • the invention relates to a pipe comprising a device for optimizing the transmission of heat therein according to the preamble of claim 1.
  • Such combinations pipe-devices are known from US 3,394,736 .
  • Heat exchange apparatuses are known, such as for example fire tube boilers for producing hot water or other heat transfer fluids, which provide for the presence of pipes intended to convey exhaust gases produced by combustion in adapted furnaces, which are inserted within a vessel that contains the fluid to be heated.
  • pipes of this type are not typical exclusively of boilers, but can also be present in different apparatuses of industrial cycles.
  • the aim of the present invention is to provide a device that can optimize effectively the characteristics of heat transmission between the exhaust gases conveyed by the pipes and the fluid that flows on the outside of the pipes.
  • the numeral 1 generally designates the device according to the invention, inserted in a pipe 2 designed to convey inside it a stream of exhaust gases and to be lapped externally by the fluid to be heated.
  • the device 1 comprises, in a single piece assembly, a plurality of longitudinal fins 3, which extend in a substantially radial direction from a central core 4 and come into contact with the inner surface of the pipe 2.
  • the individual fins 3 have a slight curvature, which enhances their elasticity characteristics both during the insertion of the device in the pipe and during operation.
  • Such fins further have an end 3a which is widened so as to define a foot for contact with the inner surface of the pipe.
  • the presence of the device according to the invention gives great effectiveness to the transmission of heat between the exhaust gases conveyed by the pipe 2 and the fluid that laps the pipe externally, because the fins 3 convey, by conduction, to the pipe wall the heat captured at the central portion of the pipe, where the exhaust gases are hotter, and moreover the inner surface of the pipe wall is lapped directly by the stream of exhaust gases without any obstacle being interposed so as to constitute a shield to the flow of heat.
  • Figures 3 and 4 are views of a first variation of the invention, which no longer has a single piece configuration but comprises two sections, generally designated by the reference numerals 5 and 6, each comprising a portion of the central core which is provided with respective fins.
  • the section 5 comprises a portion 5a of the central core with respective fins 5b, 5c, 5d, 5e
  • the section 6 comprises a portion 6a of the central core with respective fins 6b, 6c, 6d, 6e.
  • the variation shown in Figures 5 and 6 again comprises two sections 7 and 8, each of which comprises a portion of the central core which is provided with respective fins, and provides for the presence of an expander, which is extended over the entire length of the device and is adapted to keep the sections in contact with the inner surface of the pipe and is constituted by a threaded stem 9, which is shown partially extracted for clarity of illustration.
  • the turbulator comprises, in the variation of Figure 7 , a plurality of rings 10, whereas in the variation of Figure 9 it has the shape of a spiral 11.

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)
  • Heat Treatment Of Articles (AREA)

Claims (8)

  1. Tuyau comprenant un dispositif (1) pour optimiser la transmission de chaleur dans celui-ci pour transporter des gaz d'échappement dans un appareil d'échange de chaleur, le dispositif (1) étant inséré dans le tuyau (2) et comprenant une pluralité d'ailettes longitudinales (3 ; 5a, 5b, 5c, 5d, 5e, 6a, 6b, 6c, 6d, 6e) qui s'étendent dans une direction sensiblement radiale depuis un noyau central (4 ; 5a, 6a) et viennent en contact avec la surface interne du tuyau, caractérisé par la présence d'un turbulateur (10 ; 11) qui est adapté pour perturber la couche limite du flux de gaz d'échappement en contact avec la surface interne du tuyau (2), et qui est inséré dans un siège disposé à l'extrémité externe des ailettes.
  2. Tuyau selon la revendication 1, caractérisé en ce que les ailettes (3) sont légèrement courbées et ont une extrémité plus large (3a) de façon à définir un pied pour contact avec la surface interne du tuyau (2).
  3. Tuyau selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il présente une configuration monobloc.
  4. Tuyau selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comprend une pluralité de sections (5, 6 ; 7, 8), dont chacune comprend une partie (5a, 6a) du noyau central qui est pourvu d'ailettes respectives (5a, 5b, 5c, 5d, 5e, 6a, 6b, 6c, 6d, 6e).
  5. Tuyau selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comprend une pluralité de sections (5, 6 ; 7, 8), dont chacune comprend une partie (5a, 6a) du noyau central qui est pourvu d'ailettes respectives, ledit noyau central contenant en son sein un extenseur (9) qui est adapté pour maintenir l'ensemble de sections en contact avec la surface interne du tuyau (2).
  6. Tuyau selon la revendication 5, caractérisé en ce que l'extenseur compris dans le noyau central est constitué d'une tige filetée (9).
  7. Tuyau selon la revendication 1, caractérisé en ce que le turbulateur comprend une pluralité d'anneaux (10).
  8. Tuyau selon la revendication 1, caractérisé en ce que le turbulateur a la forme d'une spirale (11).
EP11740624.9A 2010-11-04 2011-07-27 Dispositif permettant d'optimiser la transmission de chaleur dans un tuyau pour transporter des gaz d'échappement dans un appareil d'échange thermique Active EP2635868B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11740624T PL2635868T3 (pl) 2010-11-04 2011-07-27 Urządzenie do optymalizowania przenoszenia ciepła w rurze do transportowania gazów spalinowych w urządzeniu do wymiany ciepła

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A002048A IT1406668B1 (it) 2010-11-04 2010-11-04 Dispositivo di ottimizzazione della trasmissione del calore in tubo di convogliamento di fumi in apparecchio di scambio termico.
PCT/EP2011/062874 WO2012059250A1 (fr) 2010-11-04 2011-07-27 Dispositif permettant d'optimiser la transmission de chaleur dans un tuyau pour transporter des gaz d'échappement dans un appareil d'échange thermique

Publications (2)

Publication Number Publication Date
EP2635868A1 EP2635868A1 (fr) 2013-09-11
EP2635868B1 true EP2635868B1 (fr) 2018-10-24

Family

ID=43742667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11740624.9A Active EP2635868B1 (fr) 2010-11-04 2011-07-27 Dispositif permettant d'optimiser la transmission de chaleur dans un tuyau pour transporter des gaz d'échappement dans un appareil d'échange thermique

Country Status (4)

Country Link
EP (1) EP2635868B1 (fr)
IT (1) IT1406668B1 (fr)
PL (1) PL2635868T3 (fr)
WO (1) WO2012059250A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10030867B2 (en) * 2013-09-19 2018-07-24 PSNergy, LLC Radiant heat insert
DE102015217541B4 (de) * 2015-09-14 2017-04-06 Magna powertrain gmbh & co kg Kühleranordnung für ein Kraftfahrzeug
WO2017066867A1 (fr) * 2015-10-21 2017-04-27 Frostfree Venting Inc. Procédé et appareil permettant d'éviter l'accumulation de givre ou de glace sur des tuyaux de ventilation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB698843A (en) * 1950-09-18 1953-10-21 Brown Fintube Co Heat exchanger tube with internal fins and method of making same
US3394736A (en) * 1966-02-21 1968-07-30 Acme Ind Inc Internal finned tube
US3636982A (en) * 1970-02-16 1972-01-25 Patterson Kelley Co Internal finned tube and method of forming same
JP2000055509A (ja) * 1998-08-04 2000-02-25 Toshiba Corp 空気調和機の熱交換器
US20060081362A1 (en) * 2004-10-19 2006-04-20 Homayoun Sanatgar Finned tubular heat exchanger
DE102007011203A1 (de) * 2007-03-06 2008-09-11 Schako Klima Luft Ferdinand Schad Kg Zweigniederlassung Kolbingen Einrichtung zum Kühlen und/oder Heizen eines Raumes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
IT1406668B1 (it) 2014-03-07
EP2635868A1 (fr) 2013-09-11
WO2012059250A1 (fr) 2012-05-10
PL2635868T3 (pl) 2019-04-30
ITMI20102048A1 (it) 2012-05-05

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