EP2270412B1 - Échangeur thermique à spirales - Google Patents

Échangeur thermique à spirales Download PDF

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Publication number
EP2270412B1
EP2270412B1 EP20090162467 EP09162467A EP2270412B1 EP 2270412 B1 EP2270412 B1 EP 2270412B1 EP 20090162467 EP20090162467 EP 20090162467 EP 09162467 A EP09162467 A EP 09162467A EP 2270412 B1 EP2270412 B1 EP 2270412B1
Authority
EP
European Patent Office
Prior art keywords
spiral
heat exchanger
spiral body
flange
spiral heat
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
EP20090162467
Other languages
German (de)
English (en)
Other versions
EP2270412A1 (fr
Inventor
Boualem Oudjedi
Pascal Maure
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.)
Alfa Laval Spiral SAS
Alfa Laval Corporate AB
Original Assignee
Alfa Laval Spiral SAS
Alfa Laval Corporate 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 Alfa Laval Spiral SAS, Alfa Laval Corporate AB filed Critical Alfa Laval Spiral SAS
Priority to DK09162467T priority Critical patent/DK2270412T3/da
Priority to ES09162467T priority patent/ES2391439T3/es
Priority to EP20090162467 priority patent/EP2270412B1/fr
Priority to PCT/EP2010/058121 priority patent/WO2010142749A1/fr
Publication of EP2270412A1 publication Critical patent/EP2270412A1/fr
Application granted granted Critical
Publication of EP2270412B1 publication Critical patent/EP2270412B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28D9/04—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 being formed by spirally-wound plates or laminae
    • 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

Definitions

  • the present invention refers generally to spiral heat exchangers allowing a heat transfer between two fluids at different temperatures for various purposes. Specifically, the invention relates to a spiral heat exchanger being so that the inlet/outlets of the spiral body on the external shell are divided.
  • spiral heat exchangers are manufactured by means of a winding operation.
  • the two sheets are welded together at a respective end, wherein the welded joint will be comprised in a center portion of the sheets.
  • the two sheets are wound around one another by use of a retractable mandrel or the like to form the spiral element of the sheets so as to delimit two separate passages or flow channels.
  • Distance members having a height corresponding to the width of the flow channels, may be attached to the sheets to allow the spiral heat exchanger to withstand higher pressures.
  • two inlet/outlet channels are formed in the center of the spiral element.
  • the two channels are separated from each other by the center portion of the sheets.
  • a shell is formed by the outer turn of the welded of the spiral element.
  • the side ends of the spiral element are processed, wherein the spiral flow channels may be laterally closed at the two side ends in various ways.
  • a cover is attached to each of the ends.
  • One of the covers may include two connection pipes extending into the center and communicating with a respective one of the two flow channels.
  • a respective header is welded to the shell or the spiral element form an outlet/inlet member to the respective flow channel.
  • one single sheet is used for the manufacturing of the heat exchanger.
  • EP-2 071 264-A which is prior art according to article 54(3) EPC, discloses a spiral heat exchanger including a spiral body formed by spiral sheets wounded to form the spiral body. It includes a first spiral-shaped flow channel for a first medium and a second spiral-shaped flow channel for a second medium.
  • the spiral body is enclosed by a cylindrical shell being provided with connecting elements communicating with the first flow channel and the second flow channel.
  • the shell comprises two shell parts that are flexibly attached to a flange on the outer peripheral surface of the spiral body.
  • the object of the present invention is to overcome the problems mentioned above with the prior art spiral heat exchangers. More specifically, it is aimed at a spiral heat exchanger which is better balanced and more resistant to thermal fatigue, flexible to different applications and where the parts of the spiral heat exchanger can be manufactured in parallel.
  • the divider is a flange arranged on the outer periphery of the spiral body.
  • the flange of the spiral body is symmetrically arranged at the centre of the spiral body having an equal distance to the ends of the spiral body from the at least one flange.
  • the flange of the spiral body is asymmetrically arranged on the peripheral of the spiral body having a different distance to the ends of the spiral body from the at least one flange.
  • the at least one flange of the spiral body divides the outermost space of the spiral heat exchanger into at least two spaces, the outer most spaces being defined by the outer peripheral of the spiral body and the at least two shell parts at the location of the flange in respect of the ends of the spiral body.
  • the location of the flange along the peripheral of the spiral body allows control of the velocity of the mediums of the spiral heat exchanger.
  • each shell is provided two connecting elements communicating with one of the two flow channels, and each shell is provided with one connecting element on its peripheral surface and with one connecting element arranged on one of its end surfaces for communication with one of the two flow channels.
  • the at least two shell parts are each provided with a lid arranged at an open end of the at least two shell parts for closing the spiral heat exchanger.
  • a spiral heat exchanger includes at least two spiral sheets extending along a respective spiral-shaped path around a common centre axis and forming at least two spiral-shaped flow channels, which are substantially parallel to each other, wherein each flow channel includes a radially outer orifice, which enables communication between the respective flow channel and a respective outlet/inlet conduit and which is located at a radially outer part of the respective flow channel with respect to the centre axis, and a radially inner orifice, which enables communication between the respective flow channel and a respective inlet/outlet chamber, so that each flow channel permits a heat exchange fluid to flow in a substantially tangential direction with respect to the centre axis, wherein the centre axis extends through the inlet/outlet chambers at the radially inner orifice.
  • Distance members having a height corresponding to the width of the flow channels, may be attached to the sheets to enable the spiral heat exchanger to operate with higher pressure of the working fluids.
  • Fig. 1 is shown an exploded view of a spiral heat exchanger 1 according to the present invention.
  • the spiral heat exchanger 1 includes a spiral body 2, formed in a conventional way by winding two sheets of metal around a retractable mandrel, but it can also be formed in other ways.
  • the sheets may be provided with studs or distance member (not shown) attached to the sheets or formed in the surface of the sheets.
  • the studs or distance members serve to form the flow channels between the sheets and have a height corresponding to the width of the flow channels.
  • the spiral body 2 only has been schematically shown with a number of wounds, but it is obvious that it may include further wounds and that the wounds are formed from the centre of the spiral body 2 all the way out to the peripheral of the spiral body 2.
  • a flange 3 Onto a central or middle portion of an outer peripheral of the spiral body 2 a flange 3 has been attached.
  • the spiral body 2 is enclosed by a shell 4, which comprises two separate shell part 4a and 4b, and two covers 7a, 7b.
  • Each of the shell parts 4a and 4b encloses one half of the spiral body 2.
  • the covers 7a, 7b which are flexibly mounted on the shell parts 4a, 4b, seal off the open ends of the spiral body 2.
  • the flange 3 is typically a divider ring attached to the spiral body 2 by welding, by other means are also possible.
  • the shell part 4a is formed as a cylinder having an first end 5a, the first end 5a being provided with a flange 6a corresponding to the flange 3 of the spiral body 2 and enabling the shell part 4a to be attached to the flange 3.
  • the second end portion 17a of the shell parts 4a is closed by the cover 7a having a first connection element 8a centrally attached.
  • To the mantle of the shell part 4a is attached a second connection element 9a.
  • the shell part 4b is substantially identical to the shell part 4a having a first end 5b with a flange 6b, a second end portion 17b closed by the cover 7a having a first connection element 8b and a second connection element 9b attached to the mantle of the shell part 4b.
  • the connection elements 8a-b and 9a-9b are typically welded to the shell parts and are all provided with a flange for connecting the spiral heat exchanger 1 to a piping arrangement of the system of which the spiral heat exchanger 1 is a
  • the spiral heat exchanger 1 is further provided with gaskets 10a, 10b, each gasket being arranged between the end portions 11a, 11b of the spiral body 2 and the inner surface of the covers 7a, 7b, respectively, to seal off from external leakage and bypass between different turns of the same flow channel.
  • the gasket 10a, 10b can be formed as a spiral similar to the spiral of the spiral body 2, is then squeezed onto each wound of the spiral body 2. Alternatively the gaskets 10a, 10b are squeezed between the spiral body 2 and the inner surface of the covers 7a, 7b.
  • the gaskets can also be configured in other ways as long as the sealing effect is achieved.
  • the lids or end covers 7a, 7b are normally removably attached to the spiral heat exchanger 1 by hook bolts or similar, but they can also be fixedly attached by e.g. welding.
  • Fig. 2 a cross sectional view of the spiral heat exchanger 1 according to the invention is shown.
  • the flange 3 enables that each of the flow channels encircles the outer turn of the spiral body 2, thus avoiding balance problems, and the flange 3 prevents mixing of the fluids in the flow channels.
  • closing plates 12 are added to totally close the outer turn of the spiral body 2.
  • the closing plates are located at the end of the spiral body 2, adjacent to the covers 7a, 7b, respectively.
  • the outer surface of the spiral body may be provided with studs or distance members (not shown) that supports against the inner surface of the shell to resist the pressure of the working fluids of the spiral heat exchanger.
  • studs or distance members not shown
  • the outer surface of the spiral body may be provided with studs or distance members (not shown) that supports against the inner surface of the shell to resist the pressure of the working fluids of the spiral heat exchanger.
  • one or both halves of the spiral body can be provided with studs.
  • the functionality of the spiral heat exchanger 1 of Fig. 2 is as follows: A first medium enters the spiral heat exchanger 1 through the first connection element 8a formed as an inlet and where first connection element 8a is connected to a piping arrangement.
  • the first connection element 8a communicates with a first flow channel of the spiral body 2 and the first medium is transported through the first flow channel to the second connection element 9a formed as an outlet, where the first medium leaves the spiral heat exchanger 1.
  • the second connection element 9a is connected to a piping arrangement for further transportation of the first medium.
  • a second medium enters spiral heat exchanger 1 through the second connection element 9b formed as an inlet, the second connection element 9b being connected to a piping arrangement.
  • the second connection element 9b communicates with a second flow channel of the spiral body 2 and the first medium is transported through the second flow channel to the first connection element 8b formed as an outlet, where the second medium leaves the spiral heat exchanger 1.
  • the first connection element 8b is connected to a piping arrangement for further transportation of the second medium.
  • spiral heat exchanger 1 As shown by Figs. 3-4 the spiral heat exchanger 1 according to the present invention can be set up differently depending on the specific application (vertically or horizontally mounted) of the spiral heat exchanger 1.
  • the distribution of the medium will be improved as the medium will only need to distribute on the half of the length of the spiral body 2.
  • the shell 4 of the spiral heat exchanger 1 according to the invention is provided as two separate and independent shell parts 4a, 4b it is possible to using different materials for the two shell parts 4a, 4b.
  • connection elements only attached to the shell 4 and not being in contact with the spiral body 2, which otherwise is the normal construction of spiral heat exchangers, is that the thermal fatigue or stress is significantly reduced.
  • the spiral heat exchanger according to the present invention benefits among many things in that it has better balance, the distribution is improved, the thermal fatigue is reduced and the manufacturing of the spiral heat exchanger is faster and cheaper since the shell and spiral body can be manufactured in parallel.
  • connecting element has been used as an element connected to spiral heat exchanger and more specifically to the flow channels of the spiral heat exchanger, but it should be understood that the connecting element is a connection pipe or similar that typically are welded onto the spiral heat exchanger and may include means for connecting further piping arrangements to the connecting element.

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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)

Claims (7)

  1. Échangeur thermique à spirales (1) comprenant un corps à spirales (2) formé par au moins une tôle spiralée enroulée pour former le corps à spirales (2) formant au moins un premier canal d'écoulement en forme de spirale pour un premier milieu et un second canal d'écoulement en forme de spirale pour un second milieu, dans lequel le corps à spirales (2) est entouré d'une enveloppe (4) sensiblement cylindrique présentant au moins deux parties d'enveloppe (4a, 4b) qui sont dotées d'éléments de connexion (8a, 8b, 9a, 9b) communiquant avec le premier canal d'écoulement et le second canal d'écoulement, le corps à spirales (2) étant doté d'au moins un diviseur (3) attaché fixement sur sa surface périphérique extérieure, sur lequel les au moins deux parties d'enveloppe (4a, 4b) sont attachées fixement, le au moins un diviseur (3) attaché fixement créant deux canaux d'écoulement séparés entre la surface périphérique extérieure du corps à spirales (2) et l'enveloppe (4) sensiblement cylindrique, et dans lequel les au moins deux parties d'enveloppe (4a, 4b) sont chacune dotées d'un couvercle (7a, 7b) agencé à une extrémité ouverte (17a, 17b) des au moins deux parties d'enveloppe (4a, 4b) pour fermer l'échangeur thermique à spirales (1).
  2. Échangeur thermique à spirales (1) selon la revendication 1, dans lequel le diviseur est une bride (3) agencée sur la périphérie extérieure du corps à spirales (2).
  3. Échangeur thermique à spirales (1) selon la revendication 2, dans lequel la bride (3) du corps à spirales (2) est agencée symétriquement au centre du corps à spirales (2) présentant une distance égale aux extrémités (11a, 11 b) du corps à spirales (2) à partir de la au moins une bride (3).
  4. Échangeur thermique à spirales (1) selon la revendication 2, dans lequel la bride (3) du corps à spirales (2) est agencée de manière asymétrique sur la périphérie du corps à spirales (2) présentant une distance différente aux extrémités (11a, 11b) du corps à spirales (2) à partir de la au moins une bride (3).
  5. Échangeur thermique à spirales (1) selon l'une quelconque des revendications 3 ou 4, dans lequel la au moins une bride (3) du corps à spirales (2) divise l'espace le plus à l'extérieur de l'échangeur thermique à spirales (1) en au moins deux espaces, les espaces les plus à l'extérieur étant définis par la périphérie extérieure du corps à spirales (2) et les au moins deux parties d'enveloppe (4a, 4b).
  6. Échangeur thermique à spirales (1) selon la revendication 5, dans lequel chaque enveloppe (4a, 4b) est pourvue d'un élément de connexion (9a, 9b) sur sa surface périphérique et d'un élément de connexion (8a, 8b) agencé sur les couvercles (7a, 7b) pour la communication avec l'un des deux canaux d'écoulement.
  7. Échangeur thermique à spirales (1) selon la revendication 6, dans lequel les spires extérieures de l'échangeur thermique à spirales (1) sont fermées par des plaques de fermeture (12) vers l'extrémité respectivement ouverte (17a, 17b) du corps à spirales.
EP20090162467 2009-06-11 2009-06-11 Échangeur thermique à spirales Active EP2270412B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK09162467T DK2270412T3 (da) 2009-06-11 2009-06-11 Spiralvarmeveksler
ES09162467T ES2391439T3 (es) 2009-06-11 2009-06-11 Intercambiador de calor en espiral
EP20090162467 EP2270412B1 (fr) 2009-06-11 2009-06-11 Échangeur thermique à spirales
PCT/EP2010/058121 WO2010142749A1 (fr) 2009-06-11 2010-06-10 Échangeur de chaleur en spirale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090162467 EP2270412B1 (fr) 2009-06-11 2009-06-11 Échangeur thermique à spirales

Publications (2)

Publication Number Publication Date
EP2270412A1 EP2270412A1 (fr) 2011-01-05
EP2270412B1 true EP2270412B1 (fr) 2012-08-01

Family

ID=41258979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090162467 Active EP2270412B1 (fr) 2009-06-11 2009-06-11 Échangeur thermique à spirales

Country Status (4)

Country Link
EP (1) EP2270412B1 (fr)
DK (1) DK2270412T3 (fr)
ES (1) ES2391439T3 (fr)
WO (1) WO2010142749A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK180389B1 (en) 2019-10-25 2021-03-05 Danfoss As Centre body in spiral heat exchanger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB776529A (en) * 1955-11-29 1957-06-05 Rosenblads Patenter Ab Improvements in and relating to plate-type heat exchangers
DE1908385A1 (de) * 1968-08-09 1970-06-04 Schwermaschb Karl Liebknecht V Waermeaustauscher mit spiralfoermig verlaufenden Durchstroemkanaelen
DE2744002C2 (de) * 1977-09-30 1983-06-30 Hoechst Ag, 6230 Frankfurt Spiralwärmeaustauscher
ATE469330T1 (de) 2007-12-11 2010-06-15 Alfa Laval Spiral Snc Spiralwärmetauscher

Also Published As

Publication number Publication date
EP2270412A1 (fr) 2011-01-05
DK2270412T3 (da) 2012-10-22
WO2010142749A1 (fr) 2010-12-16
ES2391439T3 (es) 2012-11-26

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