EP0721560A1 - Echangeur thermique lamellaire - Google Patents

Echangeur thermique lamellaire

Info

Publication number
EP0721560A1
EP0721560A1 EP94929089A EP94929089A EP0721560A1 EP 0721560 A1 EP0721560 A1 EP 0721560A1 EP 94929089 A EP94929089 A EP 94929089A EP 94929089 A EP94929089 A EP 94929089A EP 0721560 A1 EP0721560 A1 EP 0721560A1
Authority
EP
European Patent Office
Prior art keywords
plates
plate
heat exchanger
channels
mutually
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.)
Ceased
Application number
EP94929089A
Other languages
German (de)
English (en)
Inventor
Ake STRÖM
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.)
SENEA HEAT AB
Original Assignee
SENEA HEAT AB
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 SENEA HEAT AB filed Critical SENEA HEAT AB
Publication of EP0721560A1 publication Critical patent/EP0721560A1/fr
Ceased legal-status Critical Current

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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • 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
    • F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28D9/0062—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 spaced plates with inserted 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
    • F28F2230/00—Sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
    • F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives

Definitions

  • the present invention relates to a lamellate heat exchanger.
  • Such heat exchangers are used in many different contexts.
  • One characteristic feature of a lamellate heat exchanger is that flat plates are disposed to form channels through which two heat exchange media flow on different sides of the plates.
  • the present invention is not restricted to any particular field of use and can be applied with both small heat exchang ⁇ ers and with relatively large heat exchangers of the kind used in heating plants to effect an exchange of heat between flue gases and some other medium.
  • the plates of such heat exchang- ers may, for instance, measure 4,000 x 1,000 millimeters in size, and the total plate surface area may be 4,000 sguare metres, for instance.
  • Conventional heat exchangers of the present kind which effect an exchange of heat with flue gases are constructed by welding the upper edges and lower edges of mutually parallel plates to beams or bars, so as to hold the plates in place. Side pieces are also welded to the structure, such as to obtain a tight or impervious join between the plates that form mutually adjacent channels.
  • the plates are embossed with a large number of bosses or protuberances over the whole of the plate area, with said bosses lying against adjacent plates so that the plates will be spaced from one from the other.
  • the plates are normally made of stainless steel and in order to be able to weld the plates together, it is necessary for the plates to have a smallest thickness of 1 millimeter. A smaller plate thickness would reduce the cost of materials and also increase the heat transfer capacity of the structure.
  • Heat exchangers of this kind are expensive to manufacture, partly because of the time taken to weld the structure and partly because of material costs.
  • the present heat exchanger can be used for all purposes, among them the purposes mentioned in the aforesaid patent specifica ⁇ tion.
  • each alternate plate has upwardly folded opposing first edges, and each other alternate plate has the two remaining, second edges folded up.
  • the upwardly folded parts of each plate are intended to abut an adjacent plate.
  • U-shaped strips are fitted over each upwardly folded part such that the inner surfaces of the two legs of each U-shaped strip will lie against the mutually distal surfaces of two adjacent plates.
  • each U-shaped strip is sealed against the upwardly folded part concerned and adjacent plates with an elastic glue.
  • the present invention relates to a lamellate heat exchanger which includes a number of mutually parallel plates which define channels for the two media between which an exchange of heat shall take place, wherein each plate, with the exception of the outermost plates, forms a limitation between two mutually adjacent channels, and which is charac ⁇ terized in that each plate has the same or essentially the same construction; in that each plate includes a flat, preferably rectangular, surface which is slotted at each corner, said slot extending from said corner and defining an angle with the side edges of the plates; in that two opposing first sides of the plate are bent to a generally L-shape in cross-section, wherein the plane of the outer portion of said L-shaped part is essentially parallel with the plane of the surface of said plate; in that the remaining two opposing second sides of the plate are bent to the same configuration as the first sides of said plate but in an opposite direction relative to the surface of said plate; in that plates are placed one upon the other with each alternate plate turned in one direction and each other alternate plate turned upside down; in that
  • Figure 1 is an exploded view of two metal plates forming part of a heat exchanger, said plates being shown in an exploded view to facilitate an understanding of their construction;
  • Figure 2 illustrates a metal plate of an inventive heat exchanger from above;
  • Figure 3 is a sectional view taken on the line B-B in
  • Figure 4 is a sectional view taken on the line A-A in Figure 2;
  • FIG. 5 is an exploded view of part of a heat exchanger, said view being shown to facilitate an understanding of the construction of the heat exchanger and includes more metal plates than the Figure 1 illustration;
  • - Figure 6 illustrates one corner region of a plate;
  • Figure 7 is a perspective view of one corner region of a heat exchanger
  • Figure 8 illustrates a heat exchanger in one direction of flow of a first medium
  • Figure 9 illustrates the heat exchanger of Figure 8 from beneath, i.e. in the direction of flow of a second medium
  • Figure 10 illustrates a detail for fastening two plates together
  • Figure 11 illustrates a spacer means
  • FIG. 2 Part of a lamellate heat exchanger constructed in accordance with the invention is shown in Figure 2 and in Figure 5. Only two plates 1, 2 are shown in Figure 2 for the sake of clarity.
  • the entire lamellate heat exchanger includes a plurality of mutually parallel plates which define channels for the two heat-exchange media. Each plate, with the exception of the outermost plates in a plate pack, forms a limitation between two mutually adjacent channels in the heat exchanger.
  • each plate 1, 2 has the same or essentially the same construction. As shown in Figures 1 and 2, each plate 1, 2 has a flat, preferably rectangular surface 5. As will be seen from Figure 2, there is provided in each corner of each plate a slot 6 which extends from said corner and defines an angle with the side edges of the plate. Two mutually opposing first sides 7, 8 of the plate 1, 2 are folded or bent to form an essentially L-shaped part 9, 10 in cross-section, wherein the plane of the outer portion 11, 12 of said L-shaped part is generally parallel with the plane of the plate surface 5. The remaining two opposing second sides 13, 14 of the plate 1, 2 are bent to a similar configuration, but in the opposite direction in relation to the plate surface. The lines along which said sides are bent are illustrated in broken lines in Figure 2.
  • Figure 3 is a sectional view taken on the line B-B in Figure 2
  • Figure 4 is a sectional view taken on the line A-A in Figure 2.
  • the plates 1, 2 shown in Figure 1 are mutually the same, but turned in different directions.
  • the heat exchanger is constructed by placing plates one upon the other, with each alternate plate being turned in one direction and each other alternate plate being turned upside down as illustrated in Figure 1, and as shown more clearly in Figure 5, which shows four plates 1- 4.
  • Figure 5 can be said to be an exploded view of part of the heat exchanger.
  • Each plate is fastened on one side to an adjacent plate by means of the outer parts 11, 12 of the L-shaped part 9, 10 of the first mutually opposing sides 7, 8 of the plate.
  • This is illustrated in Figure 1, where the double-headed arrows show how the plates are brought together so that the outer parts 11, 12 of the L-shaped parts on the first opposing sides will abut one another and are fastened together. This results in the formation of a first channel between the plates 1 and 2.
  • each plate is fastened on its other side to an adjacent plate by means of the outer parts 17, 18 of the L- shaped part 15, 16 of the second opposing sides 13, 14 of said plates.
  • This is illustrated in Figure 5 between the plates 2 and 3, where the double-headed arrows show how the plates 2 and 3 are brought together at the sides 13 and 14 and then fastened to one another.
  • This results in the formation of a second channel between the plates 2 and 3, this channel extending in a direction which is perpendicular to the direction in which the first channel extends.
  • any number of plates can be combined to form a plate pack in which the plates form channels of which each alternate channel extends in one direction with intermediate channels that extend perpendicular to said each alternate channel.
  • each corner of such a plate pack will include a slot.
  • an insert plate
  • FIG. 6 illustrates a plate 1 which is the uppermost plate of a plate pack and which is shown in Figure 6 from above in the normal direction of the plate 1.
  • the insert plate 19 is shown on the left of the Figure 1 before being inserted into the slots 6 of the superimposed plates, and shows the insert plate 19 inserted into the slots on the right of the Figure.
  • Figure 6 shows the insert plate 19 distanced from the slot for the sake of clarity.
  • Figure 7 is a schematic, perspective view of one such insert plate 19 inserted into the slots at one corner of a plate pack.
  • the insert plates 19 inserted into the corners connect sealingly with the slots 6, so as to separate the first and the second channels in the corners of the pack. A seal is thus fitted between the plates 1-4 and the inserted plates 19.
  • a suitable sealing compound such as silicone
  • a suitable glue is used to this end, or a suitable glue.
  • the inserted plates 19 are welded to the edges of the slots.
  • the plates 19 are preferably designed to project beyond the corners, as illustrated in Figures 6 and 7, and as also illustrated in Figures 8 and 9.
  • the outwardly projecting part of the plates 19 can be readily fastened to a casing or the like which extends around the heat exchanger, wherein channels which convey gases or liquids with which an exchange of heat is to be effected are connected to the casing.
  • the casing is not shown in the drawings, since it forms no part of the present invention.
  • the casing may be a simple box provided with connecting ports for the heat-exchanging media, although it will be understood that the casing may have any one of a number of different designs.
  • the heat exchanger can also be used without a casing, by connecting the ends of respective first and second channels of the heat exchanger to channels in which the heat exchanging media are intended to flow.
  • Figure 8 is a side view of an inventive heat exchanger corresponding to a view from the left in Figure 5.
  • Figure 9 shows the heat exchanger of Figure 8 from above. These Figures thus show first channels 20 which extend perpendicularly to second channels 21.
  • the bent plates 1-4 are made of a stainless metal sheet having a thickness of less than 1 millimeter, preferably a thickness of about 0.5 millimeter. A thinner plate thickness will increase the heat transfer capacity and reduce both material costs and weight.
  • the plates that are inserted into the corners will preferably have a thickness of about 1 to 2 millimeters. This will facilitate welding of the plates to the edges of slots 6.
  • At least the longer of the first, 7; 8, and the second, 8; 7, of the opposing sides of the plates 1-4, i.e. the longer sides of the plates 1, 2 in Figure 1, are joined together by a continuous weld, preferably by seam-welding, along the full length of said sides.
  • An inventive heat exchanger is preferably constructed by first welding plates together in pairs, i.e. welding pairs of plates together along their long sides, as illustrated in Figure 1. These pairs of plates are then joined together, by fastening the other sides, i.e. the shorter sides, together.
  • the first plates 1 and 2 and the plates 3 and 4 are first welded together along their respective long sides 7, 8.
  • the short sides 13, 14 of the plates 2 and 3 are then joined together.
  • the short sides 13, 14 may also be welded together, although this may be difficult because the space between the plates may be confined when the channels 21 are narrow. In this case, the short sides are secured to one another in some other way, for instance by spot-welding.
  • the joins can be made tight with the aid of a suitable sealing agent.
  • a U-shaped strip 22 which is fitted over the outer parts 17, 18 of the L-shaped part of two mutually adjacent plates and spot- welded to said outer part of the L-shaped parts, as illustrat ⁇ ed in Figure 10.
  • the length of the strips 22 corresponds to the length of said second sides.
  • spacer means are disposed uniformly over the surfaces of respective plates 1-4, so as to space the plates apart.
  • These spacer means may have any suitable configuration, although a preferred configuration is shown in Figure 11.
  • the spacer means 23 is a sheet-metal element that has been bent to a U-shape with flanges 24, 25 which extend outwardly from the U.
  • This spacer means may, for instance, be fastened to the plate 2 by spot- welding at the arrow 26.
  • the number of spacer means may vary in accordance with the surface area of the plates 1-4, the pressure differences between the first and the second channels respectively, and so on.
  • inventive heat exchanger With regard to the cost of manufacturing the inventive heat exchanger, it has been found that the working costs entailed by the manufacture of an inventive heat exchanger is roughly half the working cost entailed by a conventionally manufac ⁇ tured heat exchanger, despite welding the plates together. Welding results in a highly compact and impervious construc ⁇ tion and in a highly mechanically stable heat exchanger.
  • the inventive heat exchanger illustrated schematically in the drawings includes only a few plates. It will be understood, however, that a heat exchanger will normally include hundreds of plates. Naturally, the number of plates and the surface areas of said plates can vary from case to case. Furthermore, the channels may have the same or different widths. The width is given by the length of the slots 6 and by the extent to which the long sides 7, 8 and the short sides 13, 14 have been bent-up.
  • the inventive heat exchanger is dimensioned in a conventional manner in these respects.

Landscapes

  • 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 un échangeur thermique à flux transversal doté de plusieurs plaques parallèles constituant des cloisons qui séparent les conduits des deux milieux d'échange thermique. Pour l'essentiel ces plaques sont identiques et comprennent une surface de préférence rectangulaire (5) dotée de fentes (6) dans leurs angles et de bords (7, 8, 13, 14) pliés en L, la partie extérieure de ces bords étant parallèle à la surface (5). Les fentes (6) font un angle avec les bords (7, 8, 13, 14) de chaque plaque. Deux bords opposés (7, 8) sont pliés dans la même direction par rapport à cette surface (5), alors que les deux autres bords sont pliés en direction opposée. En retournant une plaque sur deux, on peut empiler les plaques (1 à 4) de façon à former des conduits (20, 21) alternés quand les parties extérieures des bords (11, 12) touchent les bords adjacents respectifs. Des bandes d'étanchéité (19) sont insérées dans les fentes (6) de coins.
EP94929089A 1993-10-06 1994-10-06 Echangeur thermique lamellaire Ceased EP0721560A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9303268 1993-10-06
SE9303268A SE510219C2 (sv) 1993-10-06 1993-10-06 Lamellvärmeväxlare med slitsade hörn och däri införda tätande plåtar
PCT/SE1994/000934 WO1995010016A1 (fr) 1993-10-06 1994-10-06 Echangeur thermique lamellaire

Publications (1)

Publication Number Publication Date
EP0721560A1 true EP0721560A1 (fr) 1996-07-17

Family

ID=20391330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94929089A Ceased EP0721560A1 (fr) 1993-10-06 1994-10-06 Echangeur thermique lamellaire

Country Status (4)

Country Link
EP (1) EP0721560A1 (fr)
FI (1) FI961523A (fr)
SE (1) SE510219C2 (fr)
WO (1) WO1995010016A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2914409A1 (fr) * 2007-03-26 2008-10-03 Bousquet Adrien Laude Disque refrigerant pour installation de stockage et de regeneration d'un fluide frigo-porteur
CN106610246A (zh) * 2017-01-17 2017-05-03 苏州三川换热器有限公司 一种板式换热器芯体结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR584939A (fr) * 1923-06-13 1925-02-18 Perfectionnements apportés aux échangeurs de chaleur du type à plaques, notamment ` ceux de ce type pour le réchauffage de l'air par des gaz de combustion
DE448576C (de) * 1924-03-04 1929-03-08 Johann Jacobsen Nach dem Kreuzstrom arbeitender Luftvorwaermer fuer Feuerungsanlagen
DE605980C (de) * 1932-09-07 1934-11-22 Ardeltwerke G M B H Plattenlufterhitzer
US2959400A (en) * 1957-11-27 1960-11-08 Modine Mfg Co Prime surface heat exchanger with dimpled sheets
SE7508256L (sv) * 1975-07-18 1977-01-19 Munters Ab Carl Sett att framstella en vermevexlarkorpp for rekuperativa vexlare

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9510016A1 *

Also Published As

Publication number Publication date
FI961523A (fi) 1996-05-30
SE9303268L (sv) 1995-04-07
WO1995010016A1 (fr) 1995-04-13
FI961523A0 (fi) 1996-04-04
SE9303268D0 (sv) 1993-10-06
SE510219C2 (sv) 1999-05-03

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