EP3534104B1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP3534104B1
EP3534104B1 EP18461523.5A EP18461523A EP3534104B1 EP 3534104 B1 EP3534104 B1 EP 3534104B1 EP 18461523 A EP18461523 A EP 18461523A EP 3534104 B1 EP3534104 B1 EP 3534104B1
Authority
EP
European Patent Office
Prior art keywords
tube
tubes
heat exchanger
height
section
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
EP18461523.5A
Other languages
German (de)
English (en)
Other versions
EP3534104A1 (fr
Inventor
Grzegorz Romanski
Maciej PEDRAS
Bartlomiej CISAK
Pawel TYRALA
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 Autosystemy Sp zoo
Original Assignee
Valeo Autosystemy Sp zoo
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Publication date
Application filed by Valeo Autosystemy Sp zoo filed Critical Valeo Autosystemy Sp zoo
Priority to EP18461523.5A priority Critical patent/EP3534104B1/fr
Priority to CN201820683989.4U priority patent/CN209263726U/zh
Publication of EP3534104A1 publication Critical patent/EP3534104A1/fr
Application granted granted Critical
Publication of EP3534104B1 publication Critical patent/EP3534104B1/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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • F28D1/047—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 bent, e.g. in a serpentine or zig-zag
    • F28D1/0471—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 bent, e.g. in a serpentine or zig-zag the conduits having a non-circular cross-section
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0229—Double end plates; Single end plates with hollow spaces

Definitions

  • the invention relates to a high pressure heat exchanger.
  • heat exchangers configured to exchange heat between two fluids
  • One of the fluids is guided between said manifolds via these tubes, while the second fluid is guided around and in a space between the tubes to enable heat exchange.
  • the tubes can be for a example flat tubes.
  • the tubes are secured in the manifolds in a fluid-tight manner.
  • the heat exchanger When the fluid traveling between the manifolds and in the tubes is a high pressure fluid, like R744 (CO2), the heat exchanger has to be adapted accordingly.
  • high pressure fluid imposes additional design constrains on the heat exchanger, as the pressure of the fluid necessitates higher mechanical resistance of its components. This pressure can exceed 120 bars.
  • JP2003166791A discloses a heat exchanger according to the preamble of claim 1 and shows how to easily and simply form an inserting hole of a header and to reduce diameter of the header.
  • plural flat tubes and a pair of headers are fixed by a joint.
  • the joint has connecting parts for the tubes with a shape branching into, for example, a trifurcation at one end and connection parts for the headers so as to insert the other end into inserting holes formed at the headers.
  • connection parts for the tubes Three flat tubes are respectively inserted into the connection parts for the tubes and fixed by brazing.
  • connection parts for the headers are inserted into the inserting holes of the header and fixed by brazing, flow passages inside the headers are connected to those inside three flat tubes.
  • EP2372288A1 shows a heat exchanger which has ducts defining a fluid circulation path, where the ducts are arranged parallel to each other.
  • the ducts are spaced for forming another fluid circulation path, where the ducts are provided with plates.
  • Inlets and/or outlets of the ducts are attached to each other for forming connection blocks, where height of each connection block is lower than height of a space of the ducts.
  • a distribution case includes a distribution chamber for distributing fluid e.g. water.
  • the manifolds In case of heat exchangers comprising flat tubes, the manifolds have slots with shape corresponding to the cross-section of the tubes.
  • the flat tubes are mounted in these slots.
  • the number of tubes is linked to the efficiency of the heat exchange, it is generally preferable to increase the number of tubes to improve the heat exchange between fluids.
  • the distance between the consecutive slots in the manifold decreases. At some point, the distance becomes too small to ensure a proper mechanical resistance of the manifold, given that the fluid which travels through the tubes and which enters said manifold operates at high pressure.
  • the object of the invention is a high pressure heat exchanger comprising a first manifold and a second manifold connected fluidly by a plurality of tube sets arranged in a spaced manner along the manifolds, each tube set comprising a first tube and a second tube, wherein each of the first and the second tubes comprises an intermediate tube section between two opposing tube end sections, and wherein the manifolds comprise slots receiving the tube end sections in a fluid-tight manner, wherein in the tube set, at least the first tube comprises a bent tube section between the tube end section and the intermediate tube section, so that the intermediate tube sections of the first and second tubes run substantially in a parallel and spaced manner to each other, while the tube end tube sections are stacked on each other within a single slot.
  • the bent tube section comprises two opposing turns.
  • both the first tube and the second tube comprise bent tube sections.
  • the spaces between the tubes in a tube set have equal height to the spaces between the tube sets.
  • a flow disruptor is arranged in a space between the first tube and the second tube in the tube set.
  • a flow disruptor is arranged in a space between the tube sets.
  • a tube height h1 of flat tubes is between 2 mm and 3 mm
  • a flow disruptor height h2 is between 1,7 mm and 2,5 mm
  • a material height h3 between consecutive slots is (2*h2)-a, a being between 0,4 and 0,8 mm.
  • a third tube is located between the first tube and the second tube, so that the end sections of the tubes 11, 12, 16 are stacked on each other within a single slot.
  • a tube height h1 of flat tubes is between 3 mm and 4,5 mm
  • a flow disruptor height h2 is between 1,7 mm and 2,5 mm
  • a material height h3 between consecutive slots is (3*h2)-a, a being between 0,4 and 0,8 mm.
  • Fig. 1 shows a known heat exchanger with flat tubes 11 in partial cross-section.
  • the heat exchanger 1 comprises a plurality of flat tubes 11 for guiding the first fluid, in particular a fluid operating at high pressure, for example R744. These tubes 11 are connected at their end portions with manifolds 10a, 10b.
  • the flat tubes 11 are arranged in horizontally parallel rows so that the first fluid can enter through the block 30 into the first manifold 10a, travel through the first column of tubes 11, reach the second manifold 10b and make a U-turn, returning to the first manifold 10a via second column of tubes 11, and then exit through outlet channel in the manifold 10a and the connecting block 30.
  • Fig. 2 shows the heat exchanger of Fig. 1 in greater detail.
  • the flat tubes 11 are placed in slots 13 of the manifold 10b (in a consecutive manner along the vertical direction).
  • the other ends of the tubes 11 are situated in manifold 10a in an analogous manner.
  • the heat exchanger further comprises flow disruptors 15, which disrupt the flow of the second fluid, in order to improve the heat exchange with the first fluid.
  • the tube height h1 is slightly smaller than manifold material height h3 between consecutive slots 13.
  • the flow disruptor 15 has a height h2. As the height of the disruptor 15 approaches the h1 value, h3 also decreases, which is detrimental to the manifolds strength. The following embodiments propose avoiding this negative dependency.
  • Fig. 3 shows a heat exchanger according to the invention in a first embodiment.
  • the invention differs from the heat exchanger discussed in relation to Figs. 1 and 2 in The example is explained relative to manifold 10b, but this description applies to manifold 10a in an analogous manner.
  • a plurality of tube sets 20, each comprising a first tube 11 and a second tube 12, is arranged along the manifold 10b in a spaced manner.
  • Each of the first and the second tubes 11, 12 comprises an intermediate tube section 11a between two opposing tube end sections 11b.
  • the manifolds 10a, 10b comprise slots 13, in which the tube end sections 11b of tubes 11, 12 are mounted in a fluid-tight manner.
  • the first tube 11 comprises a bent tube section 11c between the tube end section 11b and the intermediate tube section 11a.
  • the intermediate tube sections 11a of the first and second tubes 11, 12 then run substantially in a parallel and spaced manner to each other, while the tube end sections 11b are stacked on each other within a single slot 13. Because at least one of the tubes 11, 12 is bent in this manner, the distance between the consecutive slots 12 is enlarged. It is therefore clear that by the term 'bent' it is understood any shape which allows providing two sections of the tube, preceding the bend and following the bend, which would run in parallel but in shifted relation, as shown in the drawings. For example, the first tube 11 is bent so that it has two opposing bends (i.e. forms a chicane).
  • the tube bent section 11c is located close to the tube end section 11b. Consequently, the disruptors 15 can occupy most of the space between the tubes and prevent excessive by-passing of the second fluid.
  • the second tube 12 is a straight (i.e. non-bent) flat tube, which nevertheless comprises an intermediate portion 11a and a tube end section 11b, the tube end section 10b being placed in the slot 13.
  • the arrangement according to the invention improves mechanical resistance of the header, and at the same time allows application of known, standard flow disrupters 15.
  • the number of tubes applied along the manifold consequently can also be greater.
  • Fig. 4 shows a heat exchanger according to the invention in a second embodiment.
  • This embodiment differs from the first embodiment in that a third tube 16 is present in the tube set 20. It has the same shape as the first tube 11, but is arranged inversely and stacked below the second tube 12.
  • the tube height h1 is preferably between 3 mm and 4,5 mm
  • the flow disruptor height h2 is between 1,7 mm and 2,5 mm
  • the material height h3 between the consecutive tube slots 13 is (3*h2)-a, which is between 0,4 and 0,8 mm.
  • Fig. 5 shows a heat exchanger according to the invention in a third embodiment. It differs from the previous embodiments in that both the first tube 11 and the second tube 12 comprise tube bent sections 11c, and there is no flat tube between them.
  • the disruptors 15 can be located between the tubes 11, 12 and/or between the consecutive tube sets 20.
  • the tube height h1 is preferably between 2 mm and 3 mm
  • the flow disruptor height h2 is between 1 1,7 mm and 2,5 mm
  • the material height h3 between the consecutive tube slots 13 is (2*h2)-a, which is between 0,4 and 0,8 mm.
  • the spaces between the tubes in a tube set 20 can have equal height to the spaces between the tube sets 20. This can enable applying identical flow distributors 15.

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)

Claims (7)

  1. Échangeur de chaleur haute pression (1) comprenant un premier collecteur (10a) et un second collecteur (10b) reliés en communication fluidique par une pluralité d'ensembles de tubes (20) disposés de manière espacée le long des collecteurs (10a, 10b), chaque ensemble de tubes (20) comprenant un premier tube (11) et un deuxième tube (12), chacun des premier et deuxième tubes (11, 12) comprenant une section de tube intermédiaire (11a) entre deux sections d'extrémité de tube (11b) opposées, et les collecteurs (10a, 10b) comprenant des fentes (13) recevant les sections d'extrémité de tube (11b) de manière étanche aux fluides, dans l'ensemble de tubes (20), au moins le premier tube (11) comprenant une section de tube coudée (11c) entre la section d'extrémité de tube (11b) et la section de tube intermédiaire (11a), de sorte que les sections de tube intermédiaires (11a) des premier et deuxième tubes (11, 12) s'étendent sensiblement de manière parallèle et espacée l'une par rapport à l'autre, tandis que les sections de tube d'extrémité de tube (11b) sont empilées les unes sur les autres dans une fente (13) unique, un perturbateur d'écoulement (15) étant disposé dans un espace entre les ensembles de tubes (20), caractérisé en ce qu'une hauteur de tube (h1) du premier et du deuxième tube (11, 12) plat est comprise entre 2 et 3 mm, une hauteur de perturbateur d'écoulement (h2) est comprise entre 1,7 et 2,5 mm, et une hauteur de matériau (h3) entre des fentes consécutives (13) est (2 * hauteur de perturbateur d'écoulement (h2)) - a, a étant compris entre 0,4 et 0,8 mm.
  2. Échangeur de chaleur selon l'une quelconque des revendications précédentes, la section de tube coudée (11c) comprenant deux tours opposés.
  3. Échangeur de chaleur selon l'une quelconque des revendications précédentes, le premier tube (11) et le deuxième tube (12) comprenant tous deux des sections de tube coudées (11c).
  4. Échangeur de chaleur selon l'une quelconque des revendications précédentes, les espaces entre les tubes dans un ensemble de tubes (20) ayant une hauteur égale aux espaces entre les ensembles de tubes (20).
  5. Échangeur de chaleur selon l'une quelconque des revendications précédentes, un perturbateur d'écoulement (15) étant disposé dans un espace entre le premier tube (11) et le deuxième tube (12) dans l'ensemble de tubes (20).
  6. Échangeur de chaleur selon l'une quelconque des revendications 1 à 5, un troisième tube (16) étant situé entre le premier tube (11) et le deuxième tube (12) de sorte que les sections d'extrémité (11b) des premier, deuxième et troisième tubes (11, 12, 16) soient empilées les unes sur les autres dans une fente (13) unique.
  7. Échangeur de chaleur selon la revendication 6, une hauteur de tube (h1) des premier, deuxième et troisième tubes (11, 12, 16) plats étant comprise entre 3 et 4,5 mm, une hauteur de perturbateur d'écoulement (h2) étant comprise entre 1,7 et 2,5 mm, et une hauteur de matériau (h3) étant entre des fentes consécutives (13) (3 * hauteur de perturbateur d'écoulement (h2)) - a, a étant compris entre 0,4 et 0,8 mm.
EP18461523.5A 2018-02-28 2018-02-28 Échangeur de chaleur Active EP3534104B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18461523.5A EP3534104B1 (fr) 2018-02-28 2018-02-28 Échangeur de chaleur
CN201820683989.4U CN209263726U (zh) 2018-02-28 2018-05-09 热交换器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18461523.5A EP3534104B1 (fr) 2018-02-28 2018-02-28 Échangeur de chaleur

Publications (2)

Publication Number Publication Date
EP3534104A1 EP3534104A1 (fr) 2019-09-04
EP3534104B1 true EP3534104B1 (fr) 2021-06-30

Family

ID=61526763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18461523.5A Active EP3534104B1 (fr) 2018-02-28 2018-02-28 Échangeur de chaleur

Country Status (2)

Country Link
EP (1) EP3534104B1 (fr)
CN (1) CN209263726U (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3907459A1 (fr) * 2020-05-04 2021-11-10 Valeo Autosystemy SP. Z.O.O. Échangeur de chaleur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003166791A (ja) * 2001-11-30 2003-06-13 Mitsubishi Heavy Ind Ltd 熱交換器
US20080105419A1 (en) * 2006-11-07 2008-05-08 Kwangheon Oh Heat exchanger
FR2958384B1 (fr) * 2010-03-31 2014-10-17 Valeo Systemes Thermiques Echangeur de chaleur pour un dispositif de climatisation pourvu d'extremites reduites.
CN103983126B (zh) * 2014-05-28 2016-08-24 丹佛斯微通道换热器（嘉兴）有限公司 换热器

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
CN209263726U (zh) 2019-08-16
EP3534104A1 (fr) 2019-09-04

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