WO2019229180A1 - Noyau d'un échangeur de chaleur comprenant des ailettes ondulées - Google Patents

Noyau d'un échangeur de chaleur comprenant des ailettes ondulées Download PDF

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Publication number
WO2019229180A1
WO2019229180A1 PCT/EP2019/064086 EP2019064086W WO2019229180A1 WO 2019229180 A1 WO2019229180 A1 WO 2019229180A1 EP 2019064086 W EP2019064086 W EP 2019064086W WO 2019229180 A1 WO2019229180 A1 WO 2019229180A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
ridge
sections
heat exchanger
distance
Prior art date
Application number
PCT/EP2019/064086
Other languages
English (en)
Inventor
Adam Sontag
Lukasz WIDZYK
Tomasz STRUS
Original Assignee
Valeo Autosystemy Sp. Z O.O.
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 Autosystemy Sp. Z O.O. filed Critical Valeo Autosystemy Sp. Z O.O.
Publication of WO2019229180A1 publication Critical patent/WO2019229180A1/fr

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
    • F28F1/12—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
    • F28F1/126—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 consisting of zig-zag shaped fins
    • F28F1/128—Fins with openings, e.g. louvered fins
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • a core of a heat exchanger comprising corrugated fins
  • the invention relates to a core of heat exchanger comprising corrugated fins, and in particular it relates to the shape of a corrugated fin.
  • Heat exchangers are well known in the state of the art, for example, in the automotive industry. Heat exchangers usually comprise a core consisting of a plurality of oblate pipes for leading a heating medium, i.e. flow of liquid or gas, and corrugated fins located between the oblate pipes along the whole length of the pipes. The ends of the pipes are connected with manifolds and tanks for, respectively, supplying to the pipes and leading away, the medium circulating in heat exchanger pipes. Each corrugated fin is usually shaped from sheet metal and has wavelike ridges disposed transversely to the core length. In the spaces between individual ridges of a fin there are defined channels for leading the second medium, i.e. flow of another gas, for example air, participating in heat exchange. The fin ridges are heated as a result of their contact with pipes wherein a heating medium flows, i.e. hot liquid or gas, whereas the second medium flowing through the channels is heated by contact with the heated fin ridges.
  • a heating medium flows
  • the ridges extend obliquely to the front and rear surface of the core and consequently for a particular channel the inlet of the heated medium is displaced relative to the outlet of the heated medium relative to the line perpendicular to the front and rear surface of the core as a result of which the flow of the heated medium, being supplied in the direction perpendicular to the front surface of the core, hits the surfaces of the ridge flanks and intensifies the absorption of heat by the heated medium.
  • a heat exchanger comprising a core consisting of flat pipes and corrugated fins located in contact with and between said pipes.
  • the fins are formed of a corrugated metal strip and the crests of such formed ridges extend in a direction transverse to the flat pipes and thus form channels for the flow of a heated medium between the inlet thereof on the front surface of the core and the outlet on the rear surface of the core.
  • Each ridge has slits formed on the flanks thereof which change the direction of the heated medium flow through said channels to improve efficiency of heat exchange.
  • Fin ridges may by bent in V-shaped form along their width, which additionally boosts heat exchange efficiency.
  • the purpose of the present invention is to provide a heat exchanger core that would exhibit enhanced heat exchange efficiency and a smaller drop in the pressure of a heated medium led through the channels of a corrugated rib, and which would also be easy to manufacture and use.
  • the use of the heat exchanger core according to the invention makes it possible to reduce pressure drop of the heated medium during its flow between the inlet thereof on the front surface of the heat exchanger and the outlet on the rear surface of the heat exchanger, which in consequence increases mass flow of a cooling medium.
  • This fact may be used to boost efficiency of heat exchangers and makes it possible to reduce the power of fan system that generates a cooling medium stream.
  • Fig. 1 shows a front view of a heat exchanger comprising a core according to the present invention
  • Fig. 2 shows an enlarged perspective view of a fragment of a corrugated fin of the core according to the invention
  • Fig. 3 shows schematically the shape of one ridge of the corrugated fin in a cross-section A-A of Fig. 2;
  • Fig. 4 shows schematically the shape of one ridge of a fin in a view from direction B in Fig. 2.
  • Fig. 1 presents a heat exchanger 1 comprising a core 2 according to the invention and a pair of manifolds 3 disposed on both flanks of the core 2.
  • the core 2 comprises oblate pipes 4 disposed in the length direction L of the core 2
  • the pipes 4 are connected at their ends with manifolds 3 of the heat exchanger 1 for supplying and leading away a heating medium flowing through the pipes 4 and heating them.
  • a corrugated fin 5 being in contact therewith.
  • the corrugated fin 5 extends along the whole length L of the core 2 and of the pipes 4, and comprises a plurality of ridges 6 which have crests 7 and troughs 8.
  • the ridges 6 extend in the transverse direction relative to the length L of the core 2, i.e. between the front surface 2a and the rear surface 2b of the core 2. Between individual ridges 6 of a rib 5 and external surfaces of the pipes 4 there are formed channels for the flow of a heated medium which is directed transversely to the length L of the core 2 between the front surface 2a of the core 2 defining the inlet of the heated medium and the rear surface 2b of the core 2 defining the outlet of the heated medium.
  • the ridges 6 have a width W corresponding to the width of the core 2 (which can be more clearly seen in Fig. 2).
  • the ridges 6 of a fin 5 may be disposed perpendicularly to the front surface 2a and the rear surface 2b of the core 2, as shown in Fig. 1 , or they can be disposed obliquely to said surfaces 2a, 2b to which intensify the heat exchange.
  • each ridge 6 of a fin 5 is bent along its width W in the direction perpendicular to its width W and forms an offset 9 dividing the ridge 6 into two sections 20, 30 which are disposed one after the other in the width direction W of the ridge 6 and are translated relative to each other in the length direction L of the core 2 at a distance AL (as shown in FIG. 3 and 4).
  • the measure of the distance DI_ of the parallel translation of neighbouring sections 20, 30 of a ridge 6 is defined as the distance between central planes“a" and“b” of the neighbouring sections 20, 30 of a ridge 6 (as shown in FIG. 4).
  • the neighbouring sections 20, 30 are translated parallelly to each other at a distance DI_ which fulfils the following condition:
  • fp is the pitch of a corrugated fin 5 defined as the distance between the troughs 8 of one ridge 6, and the central planes“a",“b" are defined as planes passing through the centre of a crest 7 and at even distances from the centres of troughs 8 of one given ridge 6.
  • the use of a corrugated fin 5 shaped according to the invention in a heat exchanger 1 makes it possible to reduce pressure drop in a heated medium as it flows between the inlet thereof on the front surface 2a of the core 2 and the outlet on the rear surface 2b of the core 2.
  • Sections 20, 30 of a ridge 6 may have widths W1 and W2, respectively, which widths may be the same or different.
  • Each ridge 6 of a fin 5 has two flanks 10 which may be provided with slits 11 having deflected edges and forming louvers 12 for leading and directing a heated medium passing through the flanks 10 between the neighbouring channels formed on both sides of a ridge 6.
  • the louvers 12 are arranged in the same direction in individual sections 20, 30 on both sides of the central planes “a”, H b” thereof, and in the opposite directions in the neighbouring sections 20, 30, as it makes it possible to lead a heated medium through the heat exchanger core in both directions transverse to the core length while ensuring the same effects of heat exchange.
  • the core of a heat exchanger according to the invention may be used in heat exchangers of any type, such as an engine cooler, a condenser, an intercooler, and the like.

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)

Abstract

L'invention concerne un noyau (2) d'un échangeur de chaleur (1), comprenant des tubes aplatis/plats (4) pour l'écoulement d'un milieu chauffant et des ailettes ondulées (5) situées en contact avec et entre chaque paire de tuyaux voisins (4). Les ailettes (5) comprennent des arêtes (6) ayant une largeur (W) et formant des canaux pour l'écoulement du milieu chauffé. Chaque arête (6) d'une ailette (5) est courbée au moins en un endroit sur sa largeur (W) dans la direction transversale à sa largeur (W) formant ainsi un décalage (9) divisant l'arête (6) en deux sections (20, 30) qui sont disposées l'une après l'autre dans la direction de la largeur (W) de l'arête (6) et sont déplacées par translation parallèlement l'une à l'autre dans le sens de la longueur (L) du noyau (2) à une distance ΔL qui est définie en tant que distance entre les plans centraux (a, b) des sections voisines (20, 30) de cette arête (6), les plans centraux (a, b) des sections (20, 30) étant définis comme des plans à travers le centre d'une crête (7) et à des distances égales des centres de creux (8) de sections individuelles (20, 30) de l'arête (6) et la distance AL de la translation parallèle des sections voisines (20, 30) l'une par rapport à l'autre satisfait à la condition suivante : 0< ΔL ≤ fp/4, où fp représente le pas d'une ailette ondulée (5) définie en tant que distance entre les creux (8) d'une arête (6).
PCT/EP2019/064086 2018-05-30 2019-05-29 Noyau d'un échangeur de chaleur comprenant des ailettes ondulées WO2019229180A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18461562.3A EP3575728B1 (fr) 2018-05-30 2018-05-30 Noyau d'un échangeur de chaleur comprenant des ailettes ondulées
EP18461562.3 2018-05-30

Publications (1)

Publication Number Publication Date
WO2019229180A1 true WO2019229180A1 (fr) 2019-12-05

Family

ID=62495739

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/064086 WO2019229180A1 (fr) 2018-05-30 2019-05-29 Noyau d'un échangeur de chaleur comprenant des ailettes ondulées

Country Status (2)

Country Link
EP (1) EP3575728B1 (fr)
WO (1) WO2019229180A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3106001B1 (fr) * 2020-01-03 2022-12-02 Valeo Systemes Thermiques Échangeur de chaleur à tubes comportant des intercalaires
DE102022208567A1 (de) 2022-08-18 2024-02-29 Mahle International Gmbh Rippeneinrichtung, Wärmeübertrager mit derselben sowie Verfahren zur Herstellung einer Rippeneinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10003104A1 (de) * 1999-02-01 2000-08-03 Denso Corp Gewellte Rippe für einen Wärmetauscher
US6213196B1 (en) * 1999-09-29 2001-04-10 Denso Corporation Double heat exchanger for vehicle air conditioner
WO2003076860A1 (fr) * 2002-03-09 2003-09-18 Behr Gmbh & Co. Echangeur de chaleur
US20050199378A1 (en) 2004-03-13 2005-09-15 Bernhard Lamich Heat exchanger core and corrugated rib
US20090173477A1 (en) 2008-01-03 2009-07-09 Denso International America, Inc. Heat exchanger fin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10003104A1 (de) * 1999-02-01 2000-08-03 Denso Corp Gewellte Rippe für einen Wärmetauscher
US6213196B1 (en) * 1999-09-29 2001-04-10 Denso Corporation Double heat exchanger for vehicle air conditioner
WO2003076860A1 (fr) * 2002-03-09 2003-09-18 Behr Gmbh & Co. Echangeur de chaleur
US20050199378A1 (en) 2004-03-13 2005-09-15 Bernhard Lamich Heat exchanger core and corrugated rib
US20090173477A1 (en) 2008-01-03 2009-07-09 Denso International America, Inc. Heat exchanger fin

Also Published As

Publication number Publication date
EP3575728A1 (fr) 2019-12-04
EP3575728B1 (fr) 2020-12-16

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