EP1475596B1 - Plate heat exchanger with single and dopple wall plates - Google Patents

Plate heat exchanger with single and dopple wall plates Download PDF

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Publication number
EP1475596B1
EP1475596B1 EP04009741A EP04009741A EP1475596B1 EP 1475596 B1 EP1475596 B1 EP 1475596B1 EP 04009741 A EP04009741 A EP 04009741A EP 04009741 A EP04009741 A EP 04009741A EP 1475596 B1 EP1475596 B1 EP 1475596B1
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EP
European Patent Office
Prior art keywords
heat exchanger
plate
walled
plates
heat
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EP04009741A
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German (de)
French (fr)
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EP1475596A2 (en
EP1475596A3 (en
Inventor
Peter Rehberg
Ralf Lauer
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Kelvion Brazed PHE GmbH
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GEA WTT GmbH
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    • 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
    • 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

Definitions

  • the invention is in the field of plate heat exchangers.
  • a plate heat exchanger according to the preamble of claim 1 is for example from the JP 2000-266479 known.
  • Plate heat exchangers are used to transfer heat energy between heat exchanger fluids.
  • at least two heat exchanger fluids flow through separate flow spaces which are formed between heat exchanger plates in the plate heat exchanger.
  • the heat transfer plates are usually arranged in a stack, which is part of the plate heat exchanger.
  • the separate flow spaces are created by means of openings formed in the heat exchanger plates and spaces formed between the heat exchanger plates.
  • a heat transfer between the at least two heat exchanger fluids takes place substantially in the region of a central heat transfer section of the heat transfer plates.
  • one of the heat exchange fluids flows through a flow space on one side of a heat transfer plate and another heat exchange fluid through a flow space on the other side of the heat transfer plate. Heat is then exchanged between the two countercurrent heat exchanger fluids through the heat transfer plate.
  • plate heat exchangers are known in which all relevant for the heat transfer heat exchanger plates of the stack are designed as a double-walled heat exchanger plates. Double-walled heat exchanger plates are formed by means of two plate elements which come into close contact with each other at least in the region of the central heat transfer section.
  • plate heat exchangers with a stack of double-walled heat transfer plates can be used for applications where three separate flow spaces are formed for three heat exchange fluids by means of the apertures in the heat transfer plates and the spaces between the heat transfer plates in a plate heat exchanger.
  • the document WO 01/16544 A1 describes a plate heat exchanger for at least two heat exchange fluids.
  • the plate heat exchanger is formed of two single-walled heat exchanger plates, between which a double-walled heat exchanger plate is arranged.
  • the document US 5,307,869 describes a Plattcnkorschreiber.
  • the plate heat exchanger is formed with a stack of double-walled heat exchanger plates.
  • the object of the invention is to provide an improved plate heat exchanger, with which the potential applications for the use of Platten Vietnamese ceremonies enjoyedtragern be extended.
  • the invention includes the idea of providing a plate heat exchanger with a stack of heat exchanger plates arranged between two outer plates which are permanently connected to one another and between which separate flow spaces are formed for at least two heat exchanger fluids, in which part of the heat transfer plates usable for the heat transfer each designed as a single-walled heat transfer plate with a plate member and another part of the usable heat transfer for the heat transfer plates each as a double-walled heat transfer plate with two plate elements.
  • plate heat exchangers can be produced, which have sections as a single component in the stack of heat exchanger plates that meet various safety standards.
  • the combination of double-walled and single-walled heat exchanger plates has the additional advantage that in this way in a plate heat exchanger, which is usually performed with double-walled heat exchanger plates, in part, the more efficient heat transfer can be used in connection with the single-wall heat exchanger plates.
  • the manufacturing costs are reduced in comparison with the known plate heat exchangers equipped exclusively with double-walled heat exchanger plates.
  • FIG. 1 shows a schematic representation of an arrangement with a plurality of single-wall heat exchanger plates 1 and a plurality of double-walled heat exchanger plates 2. Both types of heat exchanger plates each have a central heat transfer section 3 and openings 4 in corner regions 5. In the area outside the openings 4 embossments 6 are provided for forming surface structures. The embossments 6 support the spaced arrangement of the single-walled / double-walled heat exchanger plates 1, 2 for forming the flow-through spaces when using the single-walled / double-walled heat exchanger plates 1, 2 in a plate heat exchanger.
  • a plate heat exchanger 20 is shown in front or side view.
  • the plate heat exchanger comprises a stack 21 with the arrangement of the single-walled / double-walled heat exchanger plates 1, 2 after FIG. 1 , wherein the single-walled / double-walled heat exchanger plates 1, 2 are permanently connected to one another by means of soldering.
  • the plate heat exchanger 20 further comprises two outer plates 22, 23 with ports 24 for introducing and discharging the heat exchange fluids. Between the plurality of heat exchanger plates 1, 2 separate flow spaces for the introduced via the ports 24 / discharged heat exchanger fluids are formed.
  • the heat exchanger fluids are passed along the heat exchanger plates 1, 2 through the separate flow spaces in countercurrent.
  • the embossings 6 in the central heat transfer sections 3 of the single-walled / double-walled heat exchanger plates 1, 2 cause a highly turbulent flow of the heat exchanger fluids between the several heat exchanger plates 1, 2.
  • FIG. 4 shows a cross-sectional view of the plate heat exchanger 20 after FIG. 2 along a line AA 'in FIG. 2 , Between the outer plates 22, 23 of the stack 21 with the single-walled and the double-walled heat exchanger plates 1, 2 are arranged.
  • FIG. 5 shows an enlarged view of an edge portion 25 of the cross-sectional view in FIG FIG.
  • the stack 21 comprises three double-walled heat exchanger plates 2a, 2b, 2c, each having two plate elements 2a ', 2a ", 2b', 2b" and 2c ', 2c "the single-walled as the double-walled heat exchanger plates 1, 2 have a raised edge 26 with respect to the plane of the central heat transfer section 3.
  • an optional outer edge 27 is formed, which is bent outwards, so that the outer edge 27 is substantially parallel to the plane of the central heat transfer section 3.
  • the outer edge 27 may be omitted.
  • the single-walled and double-walled heat exchanger plates 1, 2 are each combined in separate stacks 21a, 21b.
  • any combinations of single-walled and double-walled heat exchanger plates 1, 2 can be provided, for example with a plurality of stacks of single-walled / double-walled heat exchanger plates 1, 2 in a plate heat exchanger.

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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)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

Plate heat exchanger comprises a stack of heat-exchanger plates that are permanently joined together. Separate through flow chambers for at least two heat-exchanger fluids are formed between the heat-exchanger plates. Some of the heat-exchanger plates are designed as single-walled heat-exchanger plates (1) with one plate element and some are designed as double-walled heat-exchanger plates (2a-c) with two plate elements (2a'-2c', 2a''-2c''). Preferred Features: Separate through flow chambers for three heat-exchanger fluids are formed between the heat-exchanger plates.

Description

Die Erfindung liegt auf dem Gebiet von Plattenwärmeübertragern. Ein Plattenwärmeübertrager gemäss dem Oberbegriff des Anspruchs 1 ist z.B. aus der JP 2000-266479 bekannt.The invention is in the field of plate heat exchangers. A plate heat exchanger according to the preamble of claim 1 is for example from the JP 2000-266479 known.

Plattenwärmeübertrager werden genutzt, um Wärmeenergie zwischen Wärmetauscher-Fluiden zu übertragen. Hierbei durchströmen wenigstens zwei Wärmetauscher-Fluide getrennte Durchflußräume, die zwischen Wärmeübertragerplatten in dem Plattenwärmeübertrager gebildet sind. Die Wärmeübertragerplatten sind üblicherweise in einem Stapel angeordnet, welcher Teil des Plattenwärmeübertragers ist. Die getrennten Durchflußräume werden mit Hilfe von in den Wärmeübertragerplatten gebildeten Durchbrüchen und zwischen den Wärmeübertragerplatten ausgebildeten Zwischenräumen geschaffen. Eine Wärmeübertragung zwischen den wenigstens zwei Wärmetauscher-Fluiden findet hierbei im wesentlichen im Bereich eines zentralen Wärmeübergangsabschnitts der Wärmeübertragerplatten statt. Zur Übertragung der Wärmeenergie strömt eines der Wärmetauscher-Fluide durch einen Durchflußraum auf einer Seite einer Wärmeübertragerplatte und ein anderes Wärmetauscher-Fluid durch einen Durchflußraum auf der anderen Seite der Wärmeübertragerplatte. Durch die Wärmeübertragerplatte hindurch wird dann Wärme zwischen den beiden im Gegenstrom fließenden Wärmetauscher-Fluiden ausgetauscht.Plate heat exchangers are used to transfer heat energy between heat exchanger fluids. In this case, at least two heat exchanger fluids flow through separate flow spaces which are formed between heat exchanger plates in the plate heat exchanger. The heat transfer plates are usually arranged in a stack, which is part of the plate heat exchanger. The separate flow spaces are created by means of openings formed in the heat exchanger plates and spaces formed between the heat exchanger plates. A heat transfer between the at least two heat exchanger fluids takes place substantially in the region of a central heat transfer section of the heat transfer plates. To transfer the heat energy, one of the heat exchange fluids flows through a flow space on one side of a heat transfer plate and another heat exchange fluid through a flow space on the other side of the heat transfer plate. Heat is then exchanged between the two countercurrent heat exchanger fluids through the heat transfer plate.

Neben Plattenwärmeübertragern, bei denen die gestapelten Wärmeübertragerplatten jeweils als einwandige Wärmeübertragerplatten mit einem einzelnen Plattenelement ausgebildet sind, sind Plattenwärmeübertrager bekannt, bei denen sämtliche für die Wärmeübertragung relevanten Wärmeübertragerplatten des Stapels als doppelwandige Wärmeübertragerplatten ausgeführt sind. Doppelwandige Wärmeübertragerplatten werden mit Hilfe von zwei Plattenelementen gebildet, die mindestens im Bereich des zentralen Wärmeübergangsabschnitts eng aneinander zur Anlage kommen. Mit Hilfe doppelwandiger Wärmeübertragerplatten kann ein im Vergleich zu einwandigen Wärmeübertragerplatten höherer Sicherheitsstandard gewährleistet werden, indem bei einem Leck in einer der beiden Plattenelemente der doppelwandigen Wärmeübertragerplatte die beiden Wärmetauscher-Fluide nicht vermischt werden, da die Leckflüssigkeit lcdiglich in den Zwischenraum zwischen den beiden Plattenelementen und dort in den Randbereich nach außen gelangt, aber nicht auf die andere Seite der Wärmcübertragerplatte. Insbesondere Plattenwärmeübertrager mit einem Stapel doppelwandiger Warmeübertragerplatten können für Anwendungen genutzt werden, bei denen drei getrennte Durchflußräume für drei Wärmetauscher-Fluide mit Hilfe der Durchbrüche in den Wärmeübertragerplatten und den Zwischenräumen zwischen den Wärmcübcrtragcrplattcn in einem Plattenwärmeübcrtrager gebildet sind.In addition to Plattenwärmeübertragern in which the stacked heat exchanger plates are each formed as a single-wall heat exchanger plates with a single plate member, plate heat exchangers are known in which all relevant for the heat transfer heat exchanger plates of the stack are designed as a double-walled heat exchanger plates. Double-walled heat exchanger plates are formed by means of two plate elements which come into close contact with each other at least in the region of the central heat transfer section. With the help of double-walled heat exchanger plates, a higher safety standard compared to single-walled heat exchanger plates can be ensured by the case of a leak in one of the two plate elements of the double-walled Heat exchanger plate, the two heat exchanger fluids are not mixed, since the leakage liquid lcd only in the space between the two plate elements and there in the edge region to the outside, but not on the other side of the Wärmcübertragerplatte. In particular, plate heat exchangers with a stack of double-walled heat transfer plates can be used for applications where three separate flow spaces are formed for three heat exchange fluids by means of the apertures in the heat transfer plates and the spaces between the heat transfer plates in a plate heat exchanger.

Das Dokument WO 01/16544 A1 beschreibt einen Plattenwärmeübertrager für wenigstens zwei Wärmetauscherfluide. Der Plattenwärmeübertrager ist aus zwei einwandigen Wärmeübertragerplatten, zwischen denen eine doppelwandige Wärmeübertragerplatte angeordnet ist, gebildet.The document WO 01/16544 A1 describes a plate heat exchanger for at least two heat exchange fluids. The plate heat exchanger is formed of two single-walled heat exchanger plates, between which a double-walled heat exchanger plate is arranged.

In dem Dokument JP 2000-266479 wird ein Plattenwärmeübertrager für zwei Wärmetauscherfluide beschrieben, bei dem zwischen zwei äußeren Wärmeübertragerplatten ein Stapel von einwandigen Wärmeübertragerplatten gebildet ist.In the document JP 2000-266479 a plate heat exchanger for two heat exchanger fluids is described, in which between two outer heat exchanger plates, a stack of single-wall heat exchanger plates is formed.

Das Dokument US 3,537,513 beschreibt einen Plattenwärmeübertrager für drei Wärmetauschcrfluidc. In dem Plattenwärmeübertrager ist ein Stapel von einwandigen Wärmeübertragcrplattcn gebildet.The document US 3,537,513 describes a plate heat exchanger for three Wärmetauschcrfluidc. In the plate heat exchanger, a stack of single-walled Wärmeübertragcrplattcn is formed.

Das Dokument US 5,913,3G1 beschreibt einen Plattenwärmeübertrager, der mit einem Stapel von doppelwandigen Wärmeübertragerplatten gebildet ist.The document US 5,913.3G1 describes a plate heat exchanger formed with a stack of double-walled heat transfer plates.

In dem Dokument US 5,178,207 wird ein Plattenwärmeübertrager beschrieben, der mit einem Stapel von doppelwandigen Wärmeübertragerplatten gebildet ist.In the document US 5,178,207 a plate heat exchanger is described, which is formed with a stack of double-walled heat exchanger plates.

Das Dokument US 5,307,869 beschreibt einen Plattcnwärmeübertrager. Der Plattenwärmeübertrager ist mit einem Stapel von doppelwandigen Wärmeübertragerplatten gebildet.The document US 5,307,869 describes a Plattcnwärmeübertrager. The plate heat exchanger is formed with a stack of double-walled heat exchanger plates.

Das Dokument US 4,976,313 beschreibt einen Plattenwärmeübertrager, der mit einem Stapel von doppelwandigen Wärmeübertragerplatten gebildet ist.The document US 4,976,313 describes a plate heat exchanger formed with a stack of double-walled heat transfer plates.

Aufgabe der Erfindung ist es, einen verbesserten Plattenwärmeübertrager anzugeben, mit dem die Anwendungsmöglichkeiten zur Nutzung von Plattenwärmeübertragern erweitert werden.The object of the invention is to provide an improved plate heat exchanger, with which the potential applications for the use of Plattenwärmeübertragern be extended.

Diese Aufgabe wird erfindungsgemäß durch einen Plattenwärmeübertrager nach dem unabhängigen Anspruch 1 gelöst.This object is achieved by a plate heat exchanger according to the independent claim 1.

Die Erfindung umfaßt den Gedanken, einen Plattenwärmeübertrager mit einem zwischen zwei äußeren Platten angeordnetem Stapel von Wärmeübertragerplatten, die dauerhaft miteinander verbunden sind und zwischen denen getrennte Durchflußräume für wenigstens zwei Wärmetauscher-Fluide gebildet sind, vorzusehen, bei dem ein Teil der für die Wärmeübertragung nutzbaren Wärmeübertragerplatten jeweils als eine einwandige Wärmeübertragerplatte mit einem Plattenelement und ein anderer Teil der für die Wärmeübertragung nutzbaren Wärmeübertragerplatten jeweils als eine doppelwandige Wärmeübertragerplatte mit zwei Plattenelementen ausgeführt ist. Auf diese Weise können Plattenwärmeübertrager hergestellt werden, die als einzelnes Bauteil Abschnitte im Stapel der Wärmeübertragerplatten aufweisen, die verschiedene Sicherheitsstandards erfüllen. Mit Hilfe der Kombination von einwandigen und doppelwandigen Wärmeübertragerplatten in einen Plattenwärmeübertrager wird es ermöglicht, Plattenwärmeübertrager für Anwendungen herzustellen, in denen zwar in gewissem Umfang die Nutzung der teureren doppelwandigen Wärmeübertragerplatten zu Zwecken der Gewährleistung eines ausreichenden Sicherheitsstandards notwendig ist, darüber hinaus aber wenigstens ein Teil der Wärmeübertragerplatten auch einwandig ausgeführt werden kann, da für einen Teil der in dem Plattenwärmeübertrager gebildeten Durchflußräume ein geringerer Sicherheitsstandard ausreichend ist. Derartige Anwendungsfälle liegen insbesondere dann vor, wenn in dem Plattenwärmeübertrager Durchflußräume für mehr als zwei Wärmetauscher-Fluide gebildet sind. In diesem Fall kommt es häufig vor, daß bezüglich des Wärmeübergangs zwischen einem der Wärmetauscher-Fluide und einem anderen der Wärmetauscher-Fluide ein höherer Sicherheitsstandard zu gewährleisten ist, was die doppelwandige Ausbildung der Wärmeübertragerplatten voraussetzt. Bezüglich des Wärmeübergangs zwischen dem einen Wärmetauscher-Fluid und einem weiteren der Wärmetauscher-Fluide reicht jedoch ein niedriger Sicherheitsstandard aus, so daß die Wärmeübertragerplatten hier einwandig ausgebildet werden können.The invention includes the idea of providing a plate heat exchanger with a stack of heat exchanger plates arranged between two outer plates which are permanently connected to one another and between which separate flow spaces are formed for at least two heat exchanger fluids, in which part of the heat transfer plates usable for the heat transfer each designed as a single-walled heat transfer plate with a plate member and another part of the usable heat transfer for the heat transfer plates each as a double-walled heat transfer plate with two plate elements. In this way, plate heat exchangers can be produced, which have sections as a single component in the stack of heat exchanger plates that meet various safety standards. With the help of the combination of single-wall and double-walled heat exchanger plates in a plate heat exchanger, it is possible to produce plate heat exchangers for applications where to some extent the use of expensive double-walled heat exchanger plates for purposes of ensuring a sufficient safety standards is necessary, but beyond at least part of Heat exchanger plates can also be executed single-walled, as for a part of the plate heat exchanger formed flow chambers a lower safety standard is sufficient. Such applications are particularly present when flow chambers for more than two heat exchanger fluids are formed in the plate heat exchanger. In this case, it often happens that with respect to the heat transfer between one of the heat exchanger fluids and another of the heat exchanger fluids to ensure a higher safety standard, which requires the double-walled design of the heat exchanger plates. With respect to the heat transfer between the one heat exchanger fluid and another of the heat exchanger fluids, however, a low safety standard is sufficient, so that the heat exchanger plates can be formed single-walled here.

Die Kombination von doppelwandigen und einwandigen Wärmeübertragerplatten hat darüber hinaus den Vorteil, daß auf diese Weise in einem Plattenwärmeübertrager, der üblicherweise mit doppelwandigen Wärmeübertragerplatten ausgeführt ist, zum Teil die effizientere Wärmeübertragung im Zusammenhang mit den einwandigen Wärmeübertragerplatten genutzt werden kann. Darüber hinaus werden mit Hilfe der Kombination der beiden Arten von Wärmeübertragerplatten die Herstellungskosten im Vergleich zu den bekannten, ausschließlich mit doppelwandigen Wärmeübertragerplatten ausgestatteten Plattenwärmeübertragern gesenkt.The combination of double-walled and single-walled heat exchanger plates has the additional advantage that in this way in a plate heat exchanger, which is usually performed with double-walled heat exchanger plates, in part, the more efficient heat transfer can be used in connection with the single-wall heat exchanger plates. In addition, by means of the combination of the two types of heat exchanger plates, the manufacturing costs are reduced in comparison with the known plate heat exchangers equipped exclusively with double-walled heat exchanger plates.

Die Vorteile der kombinierten Nutzung von einwandigen und doppelwandigen Wärmeübertragerplatten in einem Plattenwärmeübertrager werden insbesondere dann wirksam genutzt, wenn zwischen den Wärmeübertragerplatten getrennte Durchflußräume für drei Wärmetauscher-Fluide gebildet sind.The advantages of the combined use of single-walled and double-walled heat exchanger plates in a plate heat exchanger are used effectively in particular when separate flow spaces for three heat exchanger fluids are formed between the heat exchanger plates.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf eine Zeichnung näher erläutert. Hierbei zeigen:

Figur 1
einen Stapel mit mehreren Wärmeübertragerplatten;
Figur 2
eine schematische Darstellung eines Plattenwärmeübertragers in Vorderansicht;
Figur 3
eine schematische Darstellung des Plattenwärmeübertragers nach Figur 2 in Seitenansicht;
Figur 4
eine Querschnittsdarstellung des Plattenwärmeübertragers nach Figur 2 entlang einer Linie AA' in Figur 2; und
Figur 5
eine vergrößerte Darstellung eines Randbereichs der Querschnittsdarstellung in Figur 4.
The invention is explained below with reference to embodiments with reference to a drawing. Hereby show:
FIG. 1
a stack with a plurality of heat exchanger plates;
FIG. 2
a schematic representation of a plate heat exchanger in front view;
FIG. 3
a schematic representation of the plate heat exchanger according to FIG. 2 in side view;
FIG. 4
a cross-sectional view of the plate heat exchanger after FIG. 2 along a line AA 'in FIG. 2 ; and
FIG. 5
an enlarged view of an edge region of the cross-sectional view in FIG. 4 ,

Figur 1 zeigt eine schematische Darstellung einer Anordnung mit mehreren einwandigen Wärmeübertragerplatten 1 und mehreren doppelwandigen Wärmeübertragerplatten 2. Beide Arten von Wärmeübertragerplatten verfügen jeweils über einen zentralen Wärmeübergangsabschnitt 3 sowie Durchbrüche 4 in Eckbereichen 5. Im Bereich außerhalb der Durchbrüche 4 sind zum Ausbilden von Oberflächenstrukturen Prägungen 6 vorgesehen. Die Prägungen 6 unterstützen die beabstandete Anordnung der einwandigen/doppelwandigen Wärmeübertragerplatten 1, 2 zum Ausbilden der Durchflußräume bei der Nutzung der einwandigen/doppelwandigen Wärmeübertragerplatten 1, 2 in einem Plattenwärmeübertrager. FIG. 1 shows a schematic representation of an arrangement with a plurality of single-wall heat exchanger plates 1 and a plurality of double-walled heat exchanger plates 2. Both types of heat exchanger plates each have a central heat transfer section 3 and openings 4 in corner regions 5. In the area outside the openings 4 embossments 6 are provided for forming surface structures. The embossments 6 support the spaced arrangement of the single-walled / double-walled heat exchanger plates 1, 2 for forming the flow-through spaces when using the single-walled / double-walled heat exchanger plates 1, 2 in a plate heat exchanger.

In den Figuren 2 und 3 ist ein Plattenwärmeübertrager 20 in Vorder- bzw. Seitenansicht gezeigt. Der Plattenwärmeübertrager umfaßt einen Stapel 21 mit der Anordnung der einwandigen/doppelwandigen Wärmeübertragerplatten 1, 2 nach Figur 1, wobei die einwandigen/doppelwandigen Wärmeübertragerplatten 1, 2 mittels Lötens dauerhaft miteinander verbunden sind. Der Plattenwärmeübertrager 20 umfaßt weiterhin zwei äußere Platten 22, 23 mit Anschlüssen 24 zum Einführen und Abführen der Wärmetauscher-Fluide. Zwischen den mehreren Wärmeübertragerplatten 1, 2 sind getrennte Durchflußräume für die über die Anschlüsse 24 eingeführten/abgeführten Wärmetauscher-Fluide gebildet. Die Wärmetauscher-Fluide werden entlang der Wärmeübertragerplatten 1, 2 durch die getrennten Durchflußräume im Gegenstrom geführt. Hierbei verursachen die Prägungen 6 in den zentralen Wärmeübergangsabschnitten 3 der einwandigen/doppelwandigen Wärmeübertragerplatten 1, 2 einen hochturbulenten Durchfluß der Wärmetauscher-Fluide zwischen den mehreren Wärmeübertragerplatten 1, 2.In the Figures 2 and 3 a plate heat exchanger 20 is shown in front or side view. The plate heat exchanger comprises a stack 21 with the arrangement of the single-walled / double-walled heat exchanger plates 1, 2 after FIG. 1 , wherein the single-walled / double-walled heat exchanger plates 1, 2 are permanently connected to one another by means of soldering. The plate heat exchanger 20 further comprises two outer plates 22, 23 with ports 24 for introducing and discharging the heat exchange fluids. Between the plurality of heat exchanger plates 1, 2 separate flow spaces for the introduced via the ports 24 / discharged heat exchanger fluids are formed. The heat exchanger fluids are passed along the heat exchanger plates 1, 2 through the separate flow spaces in countercurrent. In this case, the embossings 6 in the central heat transfer sections 3 of the single-walled / double-walled heat exchanger plates 1, 2 cause a highly turbulent flow of the heat exchanger fluids between the several heat exchanger plates 1, 2.

Figur 4 zeigt eine Querschnittsdarstellung des Plattenwärmeübertragers 20 nach Figur 2 entlang einer Linie AA' in Figur 2. Zwischen den äußeren Platten 22, 23 ist der Stapel 21 mit den einwandigen und den doppelwandigen Wärmeübertragerplatten 1, 2 angeordnet. Figur 5 zeigt eine vergrößerte Darstellung eines Randbereichs 25 der Querschnittsdarstellung in Figur 4. Hieraus ergibt sich, daß der Stapel 21 bei der dargestellten Ausrührungsform des Plattenwärmeübertragers 20 drei doppelwandige Wärmeübertragerplatten 2a, 2b, 2c umfaßt, die jeweils zwei Plattenelemente 2a', 2a", 2b', 2b" bzw. 2c', 2c" aufweisen. Sowohl die einwandigen als die doppelwandigen Wärmeübertragerplatten 1, 2 weisen einen gegenüber der Ebene des zentralen Wärmeübergangsabschnitts 3 hochgestellten Rand 26 auf. An dem Rand 26 ist bei der dargestellten Ausführungsform ein optionaler äußerer Rand 27 angeformt, welcher nach außen gebogen ist, so daß der äußere Rand 27 im wesentlichen parallel zur Ebene des zentralen Wärmeübergangsabschnitts 3 verläuft. Bei einer alternativen Ausführungsform kann der äußere Rand 27 weggelassen werden. FIG. 4 shows a cross-sectional view of the plate heat exchanger 20 after FIG. 2 along a line AA 'in FIG. 2 , Between the outer plates 22, 23 of the stack 21 with the single-walled and the double-walled heat exchanger plates 1, 2 are arranged. FIG. 5 shows an enlarged view of an edge portion 25 of the cross-sectional view in FIG FIG. 4 , As a result, in the illustrated embodiment of the plate heat exchanger 20, the stack 21 comprises three double-walled heat exchanger plates 2a, 2b, 2c, each having two plate elements 2a ', 2a ", 2b', 2b" and 2c ', 2c " the single-walled as the double-walled heat exchanger plates 1, 2 have a raised edge 26 with respect to the plane of the central heat transfer section 3. At the edge 26 in the illustrated embodiment an optional outer edge 27 is formed, which is bent outwards, so that the outer edge 27 is substantially parallel to the plane of the central heat transfer section 3. In an alternative embodiment, the outer edge 27 may be omitted.

Gemäß der Darstellung in Figur 5 sind die äußeren Ränder 27 der beiden Plattenelemente 2a', 2a", 2b', 2b" bzw. 2c', 2c" der doppelwandigen Wärmeübertragerplatten 2a, 2b, 2c voneinander beabstandet, wohingegen die äußeren Ränder 27 der benachbarten doppelwandigen Wärmeübertragerplatten 2a und 2b sowie 2b und 2c eng aneinander zur Anlage kommen. Auf diese Weise wird Wärmetauscher-Fluid, was aufgrund eines Lecks in einer der zwei Plattenelemente 2a', 2a", 2b', 2b" bzw. 2c', 2c"zwischen die Plattenelemente 2a', 2a", 2b', 2b" bzw. 2c', 2c" gelangt und aufgrund von Kapillarwirkung in den Bereich des Rands 26 gelangt, bereits in einem Bereich 28 von außen sichtbar.As shown in FIG. 5 the outer edges 27 of the two plate elements 2a ', 2a ", 2b', 2b" and 2c ', 2c "of the double-walled heat exchanger plates 2a, 2b, 2c are spaced apart, whereas the outer edges 27 of the adjacent double-walled heat exchanger plates 2a and 2b and 2b and 2c come into contact with each other in this way, heat exchanger fluid which is due to a leak in one of the two plate elements 2a ', 2a ", 2b', 2b" and 2c ', 2c "between the plate elements 2a', 2a ", 2b ', 2b" or 2c', 2c "passes and due to capillary action in the region of the edge 26, already visible in a region 28 from the outside.

Bei der beschriebenen Ausführungsform des Plattenwärmeübertragers 20 sind die einwandigen und doppelwandigen Wärmeübertragerplatten 1, 2 jeweils in separaten Stapeln 21a, 21b zusammengefaßt. Es können jedoch beliebige Kombinationen von einwandigen und doppelwandigen Wärmeübertragerplatten 1, 2 vorgesehen sein, beispielsweise mit mehreren Stapeln von einwandigen/doppelwandigen Wärmeübertragerplatten 1, 2 in einem Plattenwärmeübertrager. In the described embodiment of the plate heat exchanger 20, the single-walled and double-walled heat exchanger plates 1, 2 are each combined in separate stacks 21a, 21b. However, any combinations of single-walled and double-walled heat exchanger plates 1, 2 can be provided, for example with a plurality of stacks of single-walled / double-walled heat exchanger plates 1, 2 in a plate heat exchanger.

Claims (2)

  1. A plate-type heat exchanger (20) comprising a stack (21) of heat exchanger plates (1, 2) which is arranged between two outer plates (22, 23), wherein said heat exchanger plates (1, 2) are permanently interconnected and between which separate flow passage spaces for at least two heat exchange fluids are formed, characterized in that a part of the heat exchanger plates (1, 2) is designed as a single-walled heat exchanger plate (1) each, having one plate member, and another part of the heat exchanger plates (1, 2) is designed as a double-walled heat exchanger plate (2) each, having two plate members.
  2. The plate-type heat exchanger as claimed in claim 1, characterized in that separate flow passage spaces for three heat exchange fluids are formed between the heat exchanger plates (1, 2).
EP04009741A 2003-05-08 2004-04-23 Plate heat exchanger with single and dopple wall plates Expired - Lifetime EP1475596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10320812A DE10320812B4 (en) 2003-05-08 2003-05-08 Plate heat exchangers with single-walled and double-walled heat exchanger plates
DE10320812 2003-05-08

Publications (3)

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EP1475596A2 EP1475596A2 (en) 2004-11-10
EP1475596A3 EP1475596A3 (en) 2005-10-19
EP1475596B1 true EP1475596B1 (en) 2010-09-01

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EP04009741A Expired - Lifetime EP1475596B1 (en) 2003-05-08 2004-04-23 Plate heat exchanger with single and dopple wall plates

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US (1) US6973961B2 (en)
EP (1) EP1475596B1 (en)
CN (2) CN1550746A (en)
AT (1) ATE479874T1 (en)
CA (1) CA2465441C (en)
DE (2) DE10320812B4 (en)
HK (1) HK1092865A1 (en)
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Also Published As

Publication number Publication date
US6973961B2 (en) 2005-12-13
EP1475596A2 (en) 2004-11-10
CN1550746A (en) 2004-12-01
HK1092865A1 (en) 2007-02-16
ATE479874T1 (en) 2010-09-15
CA2465441A1 (en) 2004-11-08
DE502004011600D1 (en) 2010-10-14
DE10320812A1 (en) 2004-11-25
EP1475596A3 (en) 2005-10-19
US20040256083A1 (en) 2004-12-23
DE10320812B4 (en) 2007-03-01
CN100443848C (en) 2008-12-17
CA2465441C (en) 2008-12-09
NZ532496A (en) 2005-03-24
CN1847767A (en) 2006-10-18

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