EP0201665B1 - Elément de transfert de chaleur comportant des tubes parallèles à ailettes - Google Patents

Elément de transfert de chaleur comportant des tubes parallèles à ailettes Download PDF

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Publication number
EP0201665B1
EP0201665B1 EP86101327A EP86101327A EP0201665B1 EP 0201665 B1 EP0201665 B1 EP 0201665B1 EP 86101327 A EP86101327 A EP 86101327A EP 86101327 A EP86101327 A EP 86101327A EP 0201665 B1 EP0201665 B1 EP 0201665B1
Authority
EP
European Patent Office
Prior art keywords
fins
heat exchanger
corrugations
tubes
medium
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
Application number
EP86101327A
Other languages
German (de)
English (en)
Other versions
EP0201665A1 (fr
Inventor
Roland Diethelm
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer 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
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0201665A1 publication Critical patent/EP0201665A1/fr
Application granted granted Critical
Publication of EP0201665B1 publication Critical patent/EP0201665B1/fr
Expired 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
    • F28F1/32—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 having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/50—Side-by-side conduits with fins
    • Y10S165/501—Plate fins penetrated by plural conduits
    • Y10S165/504—Contoured fin surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/903—Convection

Definitions

  • the invention relates to a heat exchanger with the features of the preamble of claim 1.
  • Such a heat exchanger is known from CH-PS 310032, in which the sheet metal fins between two adjacent rows of tubes have four folds or corrugations bent in a zigzag shape, the fold edges of which run parallel to the rows of tubes and thus to the direction of flow of the second medium.
  • the one closest to the respective row of pipes is continuous, whereas the two folds between them are closed at their ends, so that the flow of the second medium is suddenly deflected and swirled at these points.
  • Such swirls are always associated with relatively high pressure losses, which increase the energy expenditure for the movement of the second medium.
  • the rectangular cross-section tubes are arranged at a mutual distance in the direction of flow of the second medium, so that this flow is disturbed on each tube. These disturbances then have an unfavorable effect on the flow of the second medium in the adjacent fold area of the ribs, which likewise leads to pressure losses.
  • the invention has for its object to improve a heat exchanger of the type mentioned with significantly lower pressure losses in terms of its heat transfer properties.
  • a heat exchanger in which in the flow region of each row of tubes, fillers placed between the ribs are arranged, which connect the tubes of one row to one another, so that the second medium does not come into direct flow contact with the tubes.
  • the rib areas between the adjacent rows of tubes have bead-like features which are intended to produce turbulence in the second medium in order to improve the heat transfer. Such eddies and the associated pressure losses should be avoided in the heat exchanger according to the invention.
  • Claim 4 characterizes a production-friendly type of design of ribs in the area of the pipe penetrations.
  • the arrangement of aerodynamic bodies according to claim 5 further improves the flow conditions and is of considerable importance if the second medium before and .; or is redirected behind the heat exchanger.
  • the heat exchanger according to FIGS. 1 and 2 has many straight tubes 2, which are arranged one above the other in several rows parallel to one another and carry a first medium, e.g. B. hot water.
  • the tubes 2 are connected to one another via many fins 3, and the heat exchanger thus formed is replaced by a second medium, e.g. B. cooling air (arrows L), flows in the direction of the rows of pipes.
  • the fins 3 consist of sheet metal and are arranged parallel to one another distributed over the length of the tubes 2.
  • each rib 3 has an undulated section 3 'and two corrugated sections 3 "adjoining it on the outside.
  • the section 3' lies in the area of penetration of the tubes 2 and, with the corrugated sections 3", has a crank 6 each connected.
  • a necked collar 7 is provided for each tube 2, which surrounds one tube in the assembled state of the heat exchanger and via which the rib is connected to the tube in a heat-conducting manner, e.g. B. by welding.
  • each rib 3 are shaped in such a way that waves of constant wavelength w adjoin one another in the direction of flow of the second medium.
  • the wave crests 5 of the waves form a straight line which starts from the upper edge of the crank 6 in FIG.
  • the wave crests also extend at right angles to the longitudinal axis of the pipes.
  • the wave troughs 5 'lying between the wave crests 5' also start from the upper edge of the cranks 6 and, after an arcuate transition, run essentially parallel to the wave crests 5.
  • about half of the corrugated sections 3 "are shown.
  • the other half, not shown, is symmetrical and ends at the upper edge of the corresponding offset of the adjacent row of tubes.
  • All the ribs 3 are identical to one another and are fitted onto the tubes for the purpose of mounting the heat exchanger and pushed together so far that the offset 6 touch each other. Since the height of the cranks is the same in each case, there are spaces 4 between two adjacent ribs 3 in their corrugated sections and between the non-corrugated flat sections 3 'spaces 4'. The distance between the corrugations of two adjacent rib sections 3 " is constant.
  • the ribs 3 with the shafts, the crankings 6 and the collar 7 are produced in a single operation from flat sheet metal strips by means of an appropriate molding tool.
  • the cooling air flows in the spaces 4 and 4 ', and the hot water to be cooled flows in the pipes 2 transversely thereto.
  • the heat is distributed over the walls of the pipes 2 into the fins 3, in which they are, without stow, spread out in a straight line.
  • the spaces 4 between the corrugated sheet metal sections 3 " there is practically no swirling of the cooling air due to the lack of perforations, so that air pressure losses occur essentially only as a result of friction; these losses are therefore very small.
  • the repeated changes in direction of the air flowing through begin the waves of the sections 3 "lead to small pressure fluctuations, which constantly result in the dismantling of the boundary layer which is formed, which ensures good heat transfer in the corrugated spaces.
  • the spaces 4 'penetrated by the tubes between the flat rib sections 3' are relatively small and, overall, cause only a slight pressure loss.
  • the cranks 6 effectively separate these spaces 4 'from the corrugated spaces 4.
  • a hyperbolic cooling tower 15 has a vertical, annular air inlet in its lower region, while the air outlet in its upper region is horizontal and circular.
  • Thirty-two heat exchangers 1 according to FIGS. 1 and 2 are arranged delta-shaped around the air inlet of the cooling tower. In the tubes 2 of this heat exchanger hot water to be cooled, z. B. from a power plant, so that the cooling air entering the cooling tower is heated.
  • each heat exchanger 1 has an inflow body 8 and an outflow body 9 in the region of the intermediate spaces 4 ′. These bodies 8 and 9, which improve the flow profile of the cooling air (arrows 16), are arranged with their boundary surfaces in alignment with the cranks 6.
  • the wavelength w cannot be constant.
  • the type of transition from the flat to the corrugated area can also be designed differently, for example by welding or gluing the corrugated sections to the cranks.
  • the cranks do not have to be flat or vertical.
  • the pipes can also run horizontally or inclined and do not have to be straight.
  • the longitudinal axis of the tubes can also be arranged inclined to the sheet metal fins.
  • a cross-section other than a rectangular matrix can be provided transversely to the longitudinal axis of the tubes.
  • the tubes can have other cross-sectional shapes, e.g. B. oval or the cross section is variable along the pipe longitudinal axis.
  • the collars 7 can be tightly connected, e.g. by soldering so that they form the tubes themselves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Claims (5)

1. Dispositif de transfert thermique comprenant plusieurs tubes (2) parallèles les uns aux autres, qui font circuler un premier fluide, sont agencés en plusieurs rangées mutuellement parallèles et sont munis de nervures (3) en tôle réparties sur leur longueur, s'étendant transversalement par rapport à l'axe des tubes et reliées à ces tubes avec conductivité thermique, chaque nervure présentant, à l'extérieur d'une région plane (3') qui entoure le tube associé et s'étend en direction du tube voisin dans la même rangée de tubes, une région (3") munie d'ondulations dépourvues de perforations, et un second fluide circulant dans les espaces intercalaires (4, 4') subsistant entre les nervures, dans la direction des rangées de tubes délimitées par les régions précitées, caractérisé par le fait que, d'une part, la région plane (3') et, d'autre part, la région (3") à ondulations de chaque nervure se trouvent dans des plans différents, mutuellement parallèles, et sont reliées l'une à l'autre par l'intermédiaire de coudages (6) dont les hauteurs, identiques les unes aux autres, déterminent l'espacement mutuel de nervures voisines; et par le fait que les crêtes (5) et les creux (5') des ondulations partent des coudages, ce qui donne, entre les ondulations de nervures voisines dans la même rangée de tubes, des espaces intercalaires ondulés de hauteur constante, parcourus par le second fluide dans la direction de l'étendue des ondulations.
2. Dispositif de transfert thermique selon la revendication 1, caractérisé par le fait que les crêtes (5) des ondulations de chaque nervure se trouvent dans un plan commun.
3. Dispositif de transfert thermique selon la revendication 1 ou 2, caractérisé par le fait que la longueur des ondulations de toutes les nervures est constante.
4. Dispositif de transfert thermique selon l'une des revendications 1 à 3, caractérisé par le fait que des collerettes (7), décolletées dans les régions planes (3') des nervures (3), ceinturent un tube considéré (2).
5. Dispositif de transfert thermique selon l'une des revendications 1 à 4, caractérisé par le fait qu'un corps (8, 9) à profil favorisant la circulation est disposé dans les régions planes des nervures, pour chaque rangée de tubes, du côté circulation d'arrivée et/ou du côté circulation de sortie du second fluide, corps dont les surfaces de délimitation viennent à fleur des coudages (6).
EP86101327A 1985-05-15 1986-02-01 Elément de transfert de chaleur comportant des tubes parallèles à ailettes Expired EP0201665B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2076/85A CH666538A5 (de) 1985-05-15 1985-05-15 Waermeuebertrager mit mehreren parallelen rohren und auf diesen angebrachten rippen.
CH2076/85 1985-05-15

Publications (2)

Publication Number Publication Date
EP0201665A1 EP0201665A1 (fr) 1986-11-20
EP0201665B1 true EP0201665B1 (fr) 1989-05-24

Family

ID=4225343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101327A Expired EP0201665B1 (fr) 1985-05-15 1986-02-01 Elément de transfert de chaleur comportant des tubes parallèles à ailettes

Country Status (6)

Country Link
US (1) US4789027A (fr)
EP (1) EP0201665B1 (fr)
JP (1) JPS61265498A (fr)
CH (1) CH666538A5 (fr)
DE (1) DE3663589D1 (fr)
HU (1) HU195316B (fr)

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CH666538A5 (de) * 1985-05-15 1988-07-29 Sulzer Ag Waermeuebertrager mit mehreren parallelen rohren und auf diesen angebrachten rippen.
AU610938B2 (en) * 1987-10-21 1991-05-30 Sanyo Radiator Co., Ltd. Plate-fin type radiator
DE9003020U1 (fr) * 1990-03-13 1990-06-21 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co Kg, 7000 Stuttgart, De
US5529120A (en) * 1994-02-01 1996-06-25 Hubbell Incorporated Heat exchanger for electrical cabinet or the like
DE19644674A1 (de) * 1996-10-28 1998-04-30 Schilling Heinz Kg Lamellenrohr-Wärmeaustauscher in Blockbauweise zur Wärmeübertragung zwischen gas-, dampfförmigen oder flüssigen Medien mit horizontalen Trennflächen
US6346159B1 (en) * 1998-11-02 2002-02-12 Lacks Industries, Inc. Vehicle wheel construction process
US6536255B2 (en) 2000-12-07 2003-03-25 Brazeway, Inc. Multivoid heat exchanger tubing with ultra small voids and method for making the tubing
US20030131976A1 (en) * 2002-01-11 2003-07-17 Krause Paul E. Gravity fed heat exchanger
US6598295B1 (en) 2002-03-07 2003-07-29 Brazeway, Inc. Plate-fin and tube heat exchanger with a dog-bone and serpentine tube insertion method
CN1228591C (zh) * 2002-07-12 2005-11-23 株式会社电装 用于冷却空气的制冷剂循环系统
DE10304077A1 (de) * 2003-01-31 2004-08-12 Heinz Schilling Kg Luft-/Wasser-Wärmetauscher mit Teilwasserwegen
DE102004011608A1 (de) * 2004-03-18 2005-10-13 Obrist Engineering Gmbh Wärmetauscher einer Fahrzeugklimaanlage
US20070119566A1 (en) * 2005-11-30 2007-05-31 Xue-Wen Peng Heat dissipation device
FR2932551B1 (fr) * 2008-06-11 2013-08-23 Atlantic Industrie Sas Radiateur a fluide caloporteur a lames chauffantes et son procede de fabrication.
DE102011050275A1 (de) * 2011-05-11 2012-11-15 Gea Energietechnik Gmbh Luftbeaufschlagter Trockenkühler
CN103245244B (zh) * 2013-05-10 2016-03-16 丹佛斯微通道换热器（嘉兴）有限公司 换热器
CN103940284B (zh) * 2014-03-21 2016-09-14 丹佛斯微通道换热器（嘉兴）有限公司 换热器及其连接方法
JP6559334B2 (ja) * 2016-04-15 2019-08-14 三菱電機株式会社 熱交換器
US11774187B2 (en) * 2018-04-19 2023-10-03 Kyungdong Navien Co., Ltd. Heat transfer fin of fin-tube type heat exchanger

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Also Published As

Publication number Publication date
JPS61265498A (ja) 1986-11-25
US4789027A (en) 1988-12-06
CH666538A5 (de) 1988-07-29
DE3663589D1 (en) 1989-06-29
HU195316B (en) 1988-04-28
EP0201665A1 (fr) 1986-11-20
HUT41531A (en) 1987-04-28

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