EP1060357B1 - Plaque d'echangeur thermique et echangeur thermique a plaques - Google Patents

Plaque d'echangeur thermique et echangeur thermique a plaques Download PDF

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Publication number
EP1060357B1
EP1060357B1 EP99906290A EP99906290A EP1060357B1 EP 1060357 B1 EP1060357 B1 EP 1060357B1 EP 99906290 A EP99906290 A EP 99906290A EP 99906290 A EP99906290 A EP 99906290A EP 1060357 B1 EP1060357 B1 EP 1060357B1
Authority
EP
European Patent Office
Prior art keywords
plate
heat exchanger
plates
flow openings
locations
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
EP99906290A
Other languages
German (de)
English (en)
Other versions
EP1060357A1 (fr
Inventor
Timo PIRILÄ
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.)
Vahterus Oy
Original Assignee
Vahterus Oy
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Filing date
Publication date
Application filed by Vahterus Oy filed Critical Vahterus Oy
Publication of EP1060357A1 publication Critical patent/EP1060357A1/fr
Application granted granted Critical
Publication of EP1060357B1 publication Critical patent/EP1060357B1/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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations

Definitions

  • the invention relates to a plate of a plate heat exchanger, which plate is used especially in welded plate heat exchangers to separate the flow ducts and to form heat transfer surfaces.
  • the plate is circular in shape and contains at least two flow openings for supplying and discharging a heat transfer medium from the ducts formed by the plates.
  • the plates of the plate heat exchanger which are advantageously made of metal, are provided with corrugations for improving the heat transfer characteristics and supporting the ducts formed between the plates of the plate heat exchanger.
  • the plates of the plate heat exchanger are welded together in pairs at the outer perimeters of the flow openings, and the plate pairs are connected together by welding the plates of the plate pairs at their outer perimeter to the plates of the other plate pairs.
  • a conventional plate heat exchanger is composed of superimposed plates which form a stack of plates which is clamped between two end plates by means of tie bars.
  • the ducts formed by the plates and the flow openings connected thereto are sealed at their outer perimeters by means of separate sealings.
  • Even though sealings have undergone an intensive development, the most significant problem in such heat exchangers is the leaking of the sealings, which can be caused by the temperature, corrosion, aging, or another corresponding factor.
  • the plates of such plate heat exhangers are typically rectangular-shaped, and the flow openings, usually four in number, are placed in the vicinity of the corners.
  • the heat transfer surfaces are typically provided with straight corrugations, or the corrugations are arranged in a v-shape.
  • the plates are stacked on top of each other in such a way that the corrugations are not in parallel, but an angle is formed between their ridges, the width of which angle significantly affects the heat transfer characteristics. Because the plates of a conventional plate heat exchanger are manufactured by pressing, the process of changing the angle between the ridges has always required a new, expensive pressing tool.
  • the Finnish patent publication FI 79409 presents a plate heat exchanger in which circular or polygonal plates are stacked on top of each other, and the stack of plates hereby formed is supported between end plates. Unlike conventional plate heat exchangers, the plates are not provided with flow openings, but the flows are directed in ducts between the plates from outside the plates. Thus the angle between the ridges can be freely chosen when using circular plates and when using polygonal plates within the restrictions set by the polygonal shape.
  • the construction according to the publication is expensive to manufacture and the problems of tightness have not been solved satisfactorily.
  • the Finnish patent publication FI 84659 discloses a solution which contains features typical both of a conventional plate heat exchanger and of a pipe heat exchanger. Similarly to conventional plate heat exchangers, one heat transfer medium is arranged to flow via flow openings located in the plates. A feature related to the tube heat exchanger is the outer cell which surrounds the heat exchanger. The most significant difference when compared with conventional solutions is the fact that the plates are welded together at the flow openings and outer perimeters. Plates according to this application can be used in a plate heat exchanger of the above-described type.
  • the purpose of this invention is to produce a circular, corrugated heat exchanger plate which contains at least one additional location for a pair of flow openings, which flow openings can be selected after pressing the heat exchanger plate.
  • the corrugation of the heat exchanger plate is cut by the outer perimeter of the flow opening in such a way that it is possible to cut a flow opening in the plate by means of the pressing tool.
  • the number of the locations of the flow opening pairs determines the ridge angle alternatives in the heat exchanger plates. In practice, one or two additional locations are often sufficient for a pair of flow openings.
  • this object is achieved by a plate as defined in claims 1-6 and by a heat exchanger as defined in claim 7.
  • the plates for a plate heat exchanger according to the invention contain at least two pairs of locations for the flow openings, wherein by providing the flow openings at the desired locations, the ridge angle between the ridges of the corrugations in the superimposed plates of the plate heat exchanger is adjusted and changed to attain the best possible heat transfer characteristics.
  • the locations of the flow openings and the central hole are composed of straight, smooth ring-like parts with a corrugation inside them.
  • An opened central hole constitutes a flow duct for one heat transfer medium and/or functions as a duct in which a supporting means is placed. Unopened locations for the central hole and the flow openings constitute a part of the heat exchange surfaces in a plate heat exchanger composed of heat exchanger plates according to the invention.
  • the ring-like straight part on the outer perimeter of the plate as well as the ring-like straight parts in the locations of the flow openings and the central hole are at least on two different levels in order to close the flow ducts formed between the plates of the plate heat exchanger.
  • the adjacent plates are welded together at their outer perimeters as well as at the outer perimeters of the central holes or at the outer perimeters of the flow openings. If the diameters of the plate blanks to be removed from the flow openings are sufficiently large, the locations of the flow openings can be formed as heat exchanger plates which contain locations for alternative flow openings and the plates thus attained can be used to form smaller plate heat exchangers.
  • a plate for a plate heat exchanger With a plate for a plate heat exchanger according to the invention, it is possible to achieve considerable advantages.
  • the price of the pressing tool used in the production of the plate does not differ from the price of a conventional tool.
  • Plates for a plate heat exchanger can be manufactured to be stocked for future deliveries.
  • the flow openings can be pressed after the heat exchanger has been thermically dimensioned before starting the assembly work. Because all the plates are produced with the same pressing tool, the plates are formed rapidly, without changes in the settings of the pressing tool. If the plates to be pressed are sufficiently large in size, the plate blanks to be removed from the flow openings can be used as plates in a small plate heat exchanger, in which plates the locations of the flow openings have already been pressed.
  • the plate for a plate heat exchanger according to the invention does not provide a stepless adjustment of the ridge angle, the angle alternatives available are sufficient in practice.
  • the basic construction of the plate heat exchanger composed of plates according to the invention is superior when compared with solutions of prior art where the ridge angle can be steplessly adjusted, at least with respect to purchase price and reliability.
  • the plate heat exchanger which is welded of plates according to the invention is small in size, reliable and provided with good pressure endurance features.
  • Figs. 1 to 3 show circular plates 1 for a plate heat exchanger, which plates 1 are made of a sheet material by means of a pressing tool. Corrugations 2 are pressed in the plate 1 by means of a pressing tool or the like. The locations 4, 5 for flow openings can be left unpunched at the pressing stage. In the middle of the plate 1 of the plate heat exchanger, it is possible to allocate a location 6 for the central hole. At the locations 4 and 5 of the flow openings as well as at the location 6 of the central hole, the corrugations 2 are cut, and at the outer perimeters of the openings there are straight, ring-like parts 7, 8, 9. The outer edges of the plate heat exchanger plates 1 are also provided with straight parts 10. In Fig. 3, the plates 1 are joined together in such a way that the ridges of the corrugations 12 form a ridge angle ⁇ with each other.
  • Figs 4 to 5 illustrate how the plates 1 of the plate heat exchanger are connected to each other.
  • the central hole 11 is opened.
  • the plates 1 are joined together as plate pairs 13 at the outer perimeters of the flow openings 3 by means of welds 12.
  • the plate pairs 13 are connected to each other at the outer perimeters of the plates 1 by means of a weld 14.
  • the opened central hole 11 is welded at its outer perimeter with a weld 15.
  • the ring-like straight parts 10 at the outer perimeters of the plates 1 as well as the straight parts 9 of the central hole 11 are in the same plane, wherein the central hole 11 is connected to flow ducts 16, which open at the outer perimeter of the plates 1.
  • the flow openings 3 and the ducts 17 constitute a closed flow circuit, whose inlet and outlet passages are composed of the flow openings 3.
  • Fig. 5 illustrates how the unopened flow openings 3 and the central hole 11 affect the flow ducts 16 and 17.
  • the flow ducts 16 and 17 remain open when meeting a location 4, 5 of the flow opening 3.
  • the ring-like straight parts 9 of the unopened central hole 11 close one of the flow ducts 16, 17 when placed on top of each other, depending on the level at which the straight parts 9 are arranged. This fact has to be taken into account when using a plate heat exchanger composed of plates 1 according to the invention at high temperatures.
  • the profile of the corrugations 2 in the plate 1 for a plate heat exchanger can have any possible shape as long as it meets the strength and thermic requirements.
  • the number of the locations 4, 5 of the flow openings 3 can be increased even so that they partly overlap each other.
  • the number of the locations 4, 5 is too large, the flow conditions in the ducts 16, 17 may change too much.
  • the size of the central hole 11 and its coupling to the flow ducts 16, 17 can be selected according to the use.

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

Abstract

L'invention concerne une plaque (1) d'échangeur thermique à plaques, comportant des emplacements alternés (4, 5) pour ouvertures d'écoulement, ces emplacements pouvant être changés pour régler l'angle des nervures entre les nervures des ondulations (2) des plaques adjacentes (1) dans un échangeur thermique à plaques composé de plaques (1), afin d'améliorer le transfert thermique et les caractéristiques d'écoulement. Ces plaques (1) peuvent également être pourvues d'un emplacements (6) destiné à un orifice central.

Claims (7)

  1. Plaque pour échangeur de chaleur à plaques, laquelle plaque constitue des surfaces de transfert de chaleur pour des milieux caloporteurs, présente une forme circulaire et est munie de cannelures (2) ou analogues s'étendant au moins partiellement dans le sens transversal de la plaque (1), la plaque (1) comprenant des emplacements non ouverts (4, 5) pour des orifices d'écoulement (3), emplacements (4, 5) dans lesquels les orifices d'écoulement (3) peuvent être formés, caractérisée en ce que la plaque (1) comprend au moins deux paires d'emplacements non ouverts (4, 5) pour des orifices d'écoulement (3) et en ce que les emplacements (4, 5) pour les orifices d'écoulement (3) sont composés de parties annulaires droites (7, 8, 9) à l'intérieur desquelles la partie de la plaque (1) comprend des cannelures (2).
  2. Plaque (1) pour échangeur de chaleur à plaques selon la revendication 1, caractérisée en ce que, au centre de la plaque (1), se trouve un emplacement (6) pour un trou central (11).
  3. Plaque (1) pour échangeur de chaleur à plaques selon la revendication 2, caractérisée en ce que l'emplacement (6) pour le trou central (11) se compose d'une partie annulaire droite (9) à l'intérieur de laquelle une partie de la plaque (1) comprend des cannelures (2).
  4. Plaque (1) pour échangeur de chaleur à plaques selon l'une quelconque des revendications 2 et 3, caractérisée en ce que les emplacements (4, 5, 6) des orifices d'écoulement (3) et du trou central (11) forment une partie des surfaces d'échange thermique.
  5. Plaque (1) pour échangeur de chaleur à plaques selon l'une quelconque des revendications 2 à 4, caractérisée en ce que la partie annulaire droite (10) du périmètre externe de la plate (1), les parties annulaires droites (7, 8, 9) des emplacements (4, 5, 6) des orifices d'écoulement (3) et du trou central (11) sont sur au moins deux niveaux différents.
  6. Plaque (1) pour échangeur de chaleur à plaques selon la revendication 1, caractérisée en ce que les cannelures (2) de la plaque (1) s'étendent en continu à travers le centre de la plaque (1) et en ce que la plaque (1) ne présente pas d'emplacement (6) pour le trou central (11).
  7. Echangeur de chaleur à plaques composé de plaques selon l'une quelconque des revendications 1 à 6, caractérisé en ce que, dans l'échangeur de chaleur à plaques composé de plaques, des plaques (1) adjacentes sont reliées les unes aux autres au niveau de leur périmètre externe, ainsi qu'au niveau du périmètre externe du trou central (11) ou au niveau du périmètre externe des orifices d'écoulement (3) par soudage ou par un procédé correspondant.
EP99906290A 1998-03-04 1999-03-04 Plaque d'echangeur thermique et echangeur thermique a plaques Expired - Lifetime EP1060357B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI980501 1998-03-04
FI980501A FI107353B (fi) 1998-03-04 1998-03-04 Levylämmönvaihtimen levy sekä levylämmönvaihdin
PCT/FI1999/000164 WO1999045332A1 (fr) 1998-03-04 1999-03-04 Plaque d'echangeur thermique et echangeur thermique a plaques

Publications (2)

Publication Number Publication Date
EP1060357A1 EP1060357A1 (fr) 2000-12-20
EP1060357B1 true EP1060357B1 (fr) 2007-06-27

Family

ID=8551142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99906290A Expired - Lifetime EP1060357B1 (fr) 1998-03-04 1999-03-04 Plaque d'echangeur thermique et echangeur thermique a plaques

Country Status (7)

Country Link
EP (1) EP1060357B1 (fr)
AU (1) AU2627799A (fr)
DE (1) DE69936380T2 (fr)
DK (1) DK1060357T3 (fr)
ES (1) ES2291015T3 (fr)
FI (1) FI107353B (fr)
WO (1) WO1999045332A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009009483U1 (de) 2009-07-10 2009-10-01 Ett Elektronenstrahl Technologien Teicha Gmbh Wärmetauscherplatte
KR101897514B1 (ko) * 2016-04-11 2018-09-12 주식회사 엘에치이 판형 열교환기용 전열판
DE202019104732U1 (de) * 2019-08-29 2019-09-11 levgen Kushch Scheibenförmige Wärmeaustauscherplatte und Scheibenplattenwärmeaustauscher, umfassend eine solche scheibenförmige Wärmeaustauscherplatte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2552335A1 (de) * 1975-11-21 1977-06-08 Impulsa Veb K Waermeuebertragungsplatten
JPS62202997A (ja) * 1986-02-28 1987-09-07 Tsuchiya Mfg Co Ltd 複合式熱交換器
SE458884B (sv) * 1987-05-29 1989-05-16 Alfa Laval Thermal Ab Permanent sammanfogad plattvaermevaexlare med sammanhaallande organ vid portarna
FI79409C (fi) * 1987-07-13 1989-12-11 Pentti Raunio Foerfarande foer konstruering av en vaermevaexlare jaemte enligt foerfarandet konstruerad vaermevaexlare.
FI94395B (fi) * 1993-12-20 1995-05-31 Mauri Eino Olavi Kontu Levylämmönsiirrin ja sen valmistusmenetelmä
EP0901602B1 (fr) * 1996-05-24 2000-02-23 Alenko AG Echangeur de chaleur et appareil pour réaliser un cycle réversible

Also Published As

Publication number Publication date
WO1999045332A1 (fr) 1999-09-10
FI980501A (fi) 1999-09-05
FI980501A0 (fi) 1998-03-04
ES2291015T3 (es) 2008-02-16
DE69936380T2 (de) 2008-03-06
FI107353B (fi) 2001-07-13
AU2627799A (en) 1999-09-20
DK1060357T3 (da) 2007-10-15
DE69936380D1 (de) 2007-08-09
EP1060357A1 (fr) 2000-12-20

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