EP0391266A1 - Heat-exchanger - Google Patents

Heat-exchanger Download PDF

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Publication number
EP0391266A1
EP0391266A1 EP90106097A EP90106097A EP0391266A1 EP 0391266 A1 EP0391266 A1 EP 0391266A1 EP 90106097 A EP90106097 A EP 90106097A EP 90106097 A EP90106097 A EP 90106097A EP 0391266 A1 EP0391266 A1 EP 0391266A1
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EP
European Patent Office
Prior art keywords
heat exchanger
support
header
tubes
exchanger according
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Granted
Application number
EP90106097A
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German (de)
French (fr)
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EP0391266B1 (en
Inventor
Karl Maier
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MTU Aero Engines AG
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MTU Motoren und Turbinen Union Muenchen GmbH
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Publication of EP0391266A1 publication Critical patent/EP0391266A1/en
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    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies

Definitions

  • the invention relates to a heat exchanger with two manifolds provided in parallel next to one another, which are connected to one another via a plurality of bundle-shaped profile tubes, the manifolds consisting of a plurality of manifold sections aligned axially one behind the other to seal.
  • a disadvantage of this arrangement is that the traction means installed inside creates a considerable flow resistance for the gas flow located there, which can lead to a noticeable reduction in the overall efficiency of the system operated with this heat exchanger.
  • Another disadvantage is that under certain operating conditions, for example when the full flow temperature is reduced to partial load due to the externally reduced inflow temperature, the manifolds shrink, while at the same time the still hot draw tubes inside the manifolds remain at the previous temperature. Leakage currents can occur under unfavorable circumstances.
  • header tubes which have at least one closed tube plate and whose axial bearings are arranged at a greater distance from this plate, are loaded by an axial force acting on the tube plate as a result of the internal pressure will. This leads to a further major influence on the strength in the perforated pipe cross section.
  • the header sections can freely expand in the axial direction due to the one-end fixation on the support frame, as a result of which strains due to thermal expansions can be avoided.
  • the deflection of the tubes about their longitudinal axis, caused by the temperature gradient over the tube cross section, only takes place over the length of the individual header sections and is therefore significantly smaller in amount than in the known, flanged long header pipes.
  • Another advantage is that by dividing it into separate header sections there is no longer any tension in the bearing points, and thus the bearing is clearly determined.
  • Another important advantage is that the changes in length caused by the thermal expansions turn out to be considerably smaller and thus smaller thermal expansion differences can be compensated for by seals. The expansion of a single header section is therefore smaller and the sealing itself is easier than with a continuous header. Due to the axial fixation of the individual header sections at only one end, the tube expands only in one direction.
  • Another advantage of the arrangement according to the invention is that no additional tensions occur in the axial direction in the individual header sections, that is to say the axial forces caused by the internal jolt on the tube plate are not transmitted to the adjacent header sections.
  • the absorption of the acceleration load in the axial direction is also simplified, since in each case only the smaller mass of the header sections and the profile tube matrix fastened therein has to be taken up.
  • free internal flow through the collecting pipes is guaranteed, which leads to a reduction in flow losses and thus to an improved efficiency.
  • the support frame has two support tubes arranged on both sides parallel to the header tubes, which are connected to one another via a plurality of spaced-apart support carriers which support both header tubes in the region of the joints of the header tube sections, each header tube section being attached at one end to a support bracket.
  • This design of the support frame ensures a favorable support of the weight and acceleration forces occurring during operation, especially in the radial direction, and at the same time the fastening of the individual header sections can be achieved with a minimum weight of the support frame. Force support in the axial direction and guidance in this direction can also be achieved.
  • Axial-elastic sealing rings are preferably provided between the individual header sections, which are advantageously designed as corrugated metal bellows (E-seals). This means that even larger sealing gaps can be sealed with good temperature resistance the seal ensures.
  • E-seals corrugated metal bellows
  • the support tubes preferably consist of individual support tube sections which are arranged between two support beams and are firmly connected to them, preferably by means of screws. This division of the support pipes into individual sections similar to the header pipes makes it possible, on the one hand, to advantageously produce the support beams and, in the event of repairs, to dismantle the heat exchanger or replace defective elements.
  • the support beams can be designed as metal plates that have two bores for pushing through the header sections, or they can be designed as castings with recesses to save material. Alternatively, it is also possible to support the support tubes continuously, i. H. to be made from one piece if this leads to simplification of the production or an improvement in the power transmission.
  • the support tubes advantageously have a round or oval cross section, wherein when using an oval cross section, the tubes are aligned with their greater bending moment of resistance in the direction of the expected load. It is also conceivable for one of the two oval support tubes to be used to make others round or to use other cross-sectional shapes, for example squares or rectangles.
  • the support tubes are preferably arranged on both sides of the header tubes in such a way that the longitudinal axes of all tubes lie in one plane (axis plane). This has the advantage that the heat exchanger can be suspended with manifolds arranged horizontally one above the other in such a way that it can be acted upon by hot gas flowing vertically on the outside. The weight forces of the heat exchanger are absorbed by the support tubes arranged above and below, the greatest rigidity of the support frame being used in the vertical direction.
  • a further advantageous embodiment of the invention provides that transverse stiffening plates are provided, each with two support beams, which are aligned centrally between the header tubes perpendicular to the axis plane. This arrangement increases the bending stiffness of the entire heat exchanger about the transverse axis lying in the axial plane. Furthermore, tensile forces are also transmitted in the axial direction.
  • the surrounding guide sleeves are provided at the joints of adjacent header sections, which are fixedly connected to the support beams and to which means for fixing one of the two header sections are attached.
  • the guide sleeves serve on the one hand for axially guiding the header sections during thermal movements, and also for receiving and fixing the sealing elements provided between the individual header sections.
  • the guide sleeves can be welded or screwed to the support beams and are made as short as possible to save weight.
  • the center for fixing the header sections is preferably designed as a tongue and groove element, which ensures easy interchangeability.
  • connecting pieces for coupling the collecting pipes to inflow and outflow lines are attached in the middle of the collecting pipes. It is possible to provide only one connecting piece on each manifold, or to attach two connecting pieces that are opposite each other with respect to the collecting pipes.
  • the advantage of this arrangement lies in the favorable flow through the collecting tubes, since half of the flow medium must flow in each direction, and the flow losses which inevitably result along the length of the collecting tube are reduced. There is also a more even flow through the profile tubes guaranteed as compared to a feed of the gas at only one axial header pipe end. The same advantages result if the connecting pieces are attached to both axial ends of each header pipe.
  • the heat exchanger 1 shown in FIG. 1 essentially consists of two header pipes 2a, 2b, which are connected to one another in terms of flow via two U-shaped profile tube bundles 3.
  • a gas flows from the manifold 2a via the two profile tube bundles 3 to the manifold 2b and thereby heats up, while at the same time hot gas in cross / counterflow is passed outside the profile tube bundles 3 in the direction denoted by 4.
  • the support tubes 5 and 6 have mounting flanges 8a, 8b, by means of which these are attached to the support beams 7.
  • transverse stiffening plates 9 are provided which extend perpendicular to the plane of the sheet.
  • header pipes 2a, 2b consist of a plurality of header pipe sections 10 and 11 arranged axially one behind the other.
  • the plate-shaped support beams 7 are provided at the joints of adjacent header sections 10, 11, each having two recesses 24 and guide sleeves 15, 16 for the header tubes 2a, 2b.
  • the support pipes 5 and 6 likewise consist of individual sections, the support pipe sections 12, 13, which have approximately the same length as the header pipe sections 10, 11. In contrast to the header pipe sections 10, 11, however, the interior spaces of the support pipe sections 12, 13 do not have to be connected to one another, that is to say the support beams 7 have no corresponding recesses. However, this would be conceivable for the purpose of saving weight.
  • Fastening flanges 8a, 8b are welded onto the support tube sections 12, 13, preferably axially, by means of which the support tube sections 12, 13 are attached to the support beams 7 via fastening elements 14.
  • the support tubes 5, 6, the support beams 7 and the cross-bracing plates 9 together form the support frame which serves to support the heat exchanger 1 and is supported in a stationary manner by means of fastening devices (not shown).
  • Guide sleeves 15, 16 are also attached to the support beams 7, into which the manifold sections 10 and 11 fit slidably.
  • the manifolds 2a, 2b are provided at one end with connecting pieces 17a, b for the supply or discharge of heat-exchanging gas, and at the other end there is one each in the axially last manifold section 10,11 Welded tube sheet 18a, b, which is supported in an adapted end piece 19, the end pieces 19 being fastened in the first support beam 7.
  • the enlarged section from FIG. 2 shown in FIG. 3 shows in particular the mounting of the header sections 10 in the guide sleeve 15.
  • the guide sleeve 15 welded to the support bracket 7 is connected via a screw connection 20 to an annular section-like spring element 21, which is let into a correspondingly designed groove 22 of the header pipe section 10 and thus their forces via the guide sleeve 15 to the support bracket 7, and from there onto the Support tube sections 12 transmits.
  • header sections 10 do not directly meet one another, but instead have a certain gap in which an axially elastic metal bellows seal 23 is provided.
  • FIG. 4 shows a further longitudinal section through the heat exchanger 1, which was placed perpendicular to the section according to FIG. 2. It can be seen in particular how individual profile tube bundles 3 are attached to the individual header tube sections 10.
  • stiffening plates 9 attached between the individual support beams 7 are shown in more detail. These have a number of recesses 24 to reduce weight, and have ribs 25 to increase the resistance to buckling - as better shown in FIG. 1 - to form a cross-sectionally H-shaped profile.
  • the transverse reinforcement plates 9 are detachably attached to the support beams by means of screws 26.
  • FIG. 6 an alternative embodiment of a support beam 7 is shown, which is designed as a cast part.
  • the connecting pieces 17c, 17d in contrast to the designs shown in the previous figures, are not arranged at an axial end of the header pipes 2a, 2b, but in the axial center thereof, being guided outwards perpendicular to the header pipe axial direction .
  • the ring-like spring element 21 is also shown, by means of which the collecting tube 2b is fastened to the support bracket 7 via the screw connections 20.

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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)
  • Transformer Cooling (AREA)

Abstract

In a heat exchanger (1) having two manifolds (2a, 2b) which are provided parallel to one another, side-by-side, and are connected to one another via a profiled tube matrix, the manifolds (2a, 2b) consist of a plurality of manifold sections (10, 11), which are sealingly aligned axially behind one another, and a support frame (7) arranged outside the manifolds (2a, 2b) is provided on which the manifold sections (10, 11) are mounted individually at one of their tube ends in each case. As a result, a favourable support of the loads occurring during operation is guaranteed in conjunction with ease of disassembly of the heat exchanger (1). <IMAGE>

Description

Die Erfindung betrifft einen Wärmetauscher mit zwei parallel nebenein­ander vorgesehenen Sammelrohren, die miteinander über eine Vielzahl von bündelförmig angeordneten Profilrohren in Verbindung stehen, wobei die Sammelrohre aus mehreren axial hintereinander dichtend ausgerich­teten Sammelrohrabschnitten bestehen.The invention relates to a heat exchanger with two manifolds provided in parallel next to one another, which are connected to one another via a plurality of bundle-shaped profile tubes, the manifolds consisting of a plurality of manifold sections aligned axially one behind the other to seal.

Ein derartiger Wärmetauscher ist beispielsweise in der Deutschen Patentanmeldung P 38 03 947 oder P 38 03 948 vorgeschlagen geworden, bei denen die Sammelrohrabschnitte durch im Inneren der Sammelrohre angeordnete Zugmittel, die als Zugstäbe oder als Zugrohre ausgebildet sein können, zusammengehalten werden. Hierdurch wird die Herstellbar­keit des Wärmetauschers sowie die Wartung erheblich vereinfacht, da hierbei nur einzelne Sammelrohrabschnitte bearbeitet bzw. ausgetauscht werden müssen. Auch sind keine Dichtheitsprobleme zu befürchten, wenn der Heißgasstrom außen an den Sammelrohren vorbeigeführt wird, da die Rohre sich hierbei zunächst stärker erwärmen als die innen angeordne­ten Zugmittel, und somit auch während der Anlaufphase Dichtheit an den Stoßstellen benachbarter Sammelrohrabschnitte gewährleistet ist.Such a heat exchanger has been proposed, for example, in German patent application P 38 03 947 or P 38 03 948, in which the header sections are held together by traction means arranged inside the header tubes, which can be designed as tie rods or as tie tubes. This considerably simplifies the manufacture of the heat exchanger and maintenance, since only individual header sections have to be processed or replaced. There are also no fear of leakage problems if the hot gas flow is led past the outside of the header pipes, since the pipes initially heat up more than the traction devices arranged on the inside, thus ensuring tightness at the joints of adjacent header pipe sections during the start-up phase.

Ein Nachteil dieser Anordnung besteht darin, daß durch die im Inneren verlegten Zugmittel ein erheblicher Strömungswiderstand für die dort befindliche Gasströmung entsteht, der zu einer merklichen Herabsetzung des Gesamtwirkungsgrades der mit diesem Wärmetauscher betriebenen Anlage führen kann. Ein weiterer Nachteil besteht darin, daß unter bestimmten Betriebszuständen, beispielsweise beim Herunterfahren von Vollast auf Teillast durch die außen reduzierte Anströmtemperatur eine Schrumpfung der Sammelrohre eintritt, während gleichzeitig die noch heißen Zugrohre im Inneren der Sammelrohre auf der vorherigen Tempera­tur bleiben. Dabei kann es unter ungünstigen Umständen zu Leckströmen kommen.A disadvantage of this arrangement is that the traction means installed inside creates a considerable flow resistance for the gas flow located there, which can lead to a noticeable reduction in the overall efficiency of the system operated with this heat exchanger. Another disadvantage is that under certain operating conditions, for example when the full flow temperature is reduced to partial load due to the externally reduced inflow temperature, the manifolds shrink, while at the same time the still hot draw tubes inside the manifolds remain at the previous temperature. Leakage currents can occur under unfavorable circumstances.

Ein weiterer Nachteil ist darin zu sehen, daß sich die oben beschrie­bene Ausführung nur für Wärmetauscher kleinere Baugröße eignet, da bei größeren Wärmetauschern durch das Eigengewicht der Profilrohrmatrix und die auftretenden Beschleunigungslasten die Belastung auf die Rohre so groß wird, daß entlang der Rohrlänge mehrere Lagerungen in radialer Richtung erforderlich sind. Bei starrem Zusammenflanschen von Sammel­rohrabschnitten entsteht ein geschlossener Rohrverbund, welcher eine erhebliche Baulänge aufweist. Aufgrund der Temperaturgradienten über den Rohrquerschnitten erfolgt eine Durchbiegung der Rohre um die Längsachse. Durch diese Durchbiegung und durch die Mehrfachauflage an sich, ist die Lagerung überbestimmt. Es kann somit zu einer Behinde­rung der Längenausdehnung kommen, und es tretet zusätzliche Belastun­gen am Rohrquerschnitt auf.Another disadvantage is that the design described above is only suitable for heat exchangers of smaller size, since in larger heat exchangers the load on the pipes becomes so great due to the weight of the profile pipe matrix and the acceleration loads that occur that several bearings in along the pipe length radial direction are required. When the manifold sections are rigidly flanged together, a closed pipe assembly is formed which has a considerable overall length. Due to the temperature gradients across the pipe cross-sections, the pipes bend around the longitudinal axis. Due to this deflection and the multiple support itself, the storage is overdetermined. This can lead to an obstruction of the linear expansion and additional stresses occur on the pipe cross-section.

Bei Beschleunigungslasten in axialer Richtung der Sammelrohre treten bei einem geschlossenen Rohrverbund erhebliche Massenbeschleunigungs­kräfte auf, welche die Rohre ebenfalls zusätzlich belasten. Ein wei­terer Nachteil besteht darin, daß Sammelrohre, die mindestens einen geschlossenen Rohrboden aufweisen, und deren axiale Lagerungen in größerer Entfernung von diesem Boden angeordnet ist, durch eine auf den Rohrboden infolge des Innendruckes einwirkende Axialkraft belastet werden. Dies führt zu einer weiteren großen Beeinflussung der Festig­keit im gelochten Rohrquerschnitt.In the case of acceleration loads in the axial direction of the header pipes, considerable mass acceleration forces occur in a closed pipe assembly, which also put additional strain on the pipes. Another disadvantage is that header tubes, which have at least one closed tube plate and whose axial bearings are arranged at a greater distance from this plate, are loaded by an axial force acting on the tube plate as a result of the internal pressure will. This leads to a further major influence on the strength in the perforated pipe cross section.

Ausgehend von diesen Anordnungen ist es Aufgabe der vorliegenden Er­findung, eine Wärmetauscheranordnung zu schaffen, welche auch bei großen Baugrößen eine möglichst günstige Abstützung der im Betrieb auf die Sammelrohre wirkenden Kräfte, insbesondere eine Abstützung von Beschleunigungskräften in den drei Hauptrichtungen, gewährleistet.Based on these arrangements, it is the object of the present invention to provide a heat exchanger arrangement which, even with large sizes, ensures the most favorable possible support of the forces acting on the header pipes during operation, in particular a support of acceleration forces in the three main directions.

Erfindungsgemäß wird die Aufgabe durch die im Kennzeichnungsteil des Patentanspruches 1 angegebenen Merkmale gelöst.According to the invention the object is achieved by the features specified in the characterizing part of patent claim 1.

Die Hauptvorteile der Erfindung sind darin zu sehen, daß die Sammel­rohrabschnitte sich durch die jeweils einendige Fixierung am Träger­rahmen in axialer Richtung frei ausdehnen können, wodurch Verspan­nungen aufgrund von Thermodehnungen vermeidbar sind. Die Durchbiegung der Rohre um ihre Längsachse, verursacht durch den Temperaturgradien­ten über dem Rohrquerschnitt erfolgt nur über die Länge der einzelnen Sammelrohrabschnitte und ist demnach im Betrag wesentlich kleiner als bei den vorbekannten, zusammengeflanschten langen Sammelrohren. Ferner von Vorteil ist, daß durch die Aufteilung auf separate Sammelrohrab­schnitte keine Verspannung der Lagerstellen mehr vorhanden ist, und somit die Lagerung eindeutig bestimmt ist. Ein weiterer wesentlicher Vorteil besteht darin, daß die durch die thermischen Ausdehnungen hervorgerufenen Längenänderungen erheblich geringer ausfallen und somit geringere Thermodehnungsunterschiede durch Dichtungen auszuglei­chen sind. Die Ausdehnung eines einzelnen Sammelrohrabschnittes ist daher kleiner und die Abdichtung an sich einfacher als bei einem durchgehenden Sammelrohr. Aufgrund der axialen Fixierung der einzelnen Sammelrohrabschnitte an nur einem Ende dehnt sich das Rohr nur in eine Richtung aus.The main advantages of the invention can be seen in the fact that the header sections can freely expand in the axial direction due to the one-end fixation on the support frame, as a result of which strains due to thermal expansions can be avoided. The deflection of the tubes about their longitudinal axis, caused by the temperature gradient over the tube cross section, only takes place over the length of the individual header sections and is therefore significantly smaller in amount than in the known, flanged long header pipes. Another advantage is that by dividing it into separate header sections there is no longer any tension in the bearing points, and thus the bearing is clearly determined. Another important advantage is that the changes in length caused by the thermal expansions turn out to be considerably smaller and thus smaller thermal expansion differences can be compensated for by seals. The expansion of a single header section is therefore smaller and the sealing itself is easier than with a continuous header. Due to the axial fixation of the individual header sections at only one end, the tube expands only in one direction.

Ein weiterer Vorteil der erfindungsgemäßen Anordnung besteht darin daß in den einzelnen Sammelrohrabschnitten keine zusätzlichen Spannungen in axialer Richtung auftreten, das heißt die durch den Innenruck auf den Rohrboden verursachten axialen Kräfte werden nicht auf die benachbarten Sammelrohrabschnitte übertragen. Auch ist die Aufnahme der Beschleunigungslast in axialer Richtung vereinfacht, da jeweils nur die kleinere Masse der Sammelrohrabschnitte und der darin befestigten Profilrohrmatrix aufgenommen werden muß. Gleichzeitig ist eine freie Innendurchströhmung der Sammelrohre gewährleistet, was zu einer Verminderung der Strömungsverluste und somit zu einem ver­besserten Wirkungsgrad führt. Die Vorteile der vorbekannten Anord­nungen, nämlich eine leichte Auswechselbarkeit einzelner beschädigter Elemente ist auch bei der erfindungsgemäßen Vorrichtung erfüllt.Another advantage of the arrangement according to the invention is that no additional tensions occur in the axial direction in the individual header sections, that is to say the axial forces caused by the internal jolt on the tube plate are not transmitted to the adjacent header sections. The absorption of the acceleration load in the axial direction is also simplified, since in each case only the smaller mass of the header sections and the profile tube matrix fastened therein has to be taken up. At the same time, free internal flow through the collecting pipes is guaranteed, which leads to a reduction in flow losses and thus to an improved efficiency. The advantages of the previously known arrangements, namely an easy interchangeability of individual damaged elements, are also met in the device according to the invention.

In zweckmäßiger Weiterbildung der Erfindung weist der Trägerrahmen zwei beidseitig parallel zu den Sammelrohren angeordnete Stützrohre auf, die über eine Mehrzahl von beabstandeten, beide Sammelrohre im Bereich der Stoßstellen der Sammelrohrabschnitte abstützende, Stütz­träger miteinander verbunden sind, wobei jeder Sammelrohrabschnitt einendig an einem Stützträger befestigt ist. Diese Ausbildung des Trägerrahmens gewährleistet eine günstige Abstützung der im Betrieb auftretenden Gewichts- und Beschleunigungskräfte vor allem in radialer Richtung, wobei gleichzeitig die Befestigung der einzelnen Sammel­rohrabschnitte bei einem minimalen Gewicht des Trägerrahmes erzielbar ist. Auch ist eine Kraftabstützung in axialer Richtung und eine Füh­rung in dieser Richtung erzielbar.In an expedient development of the invention, the support frame has two support tubes arranged on both sides parallel to the header tubes, which are connected to one another via a plurality of spaced-apart support carriers which support both header tubes in the region of the joints of the header tube sections, each header tube section being attached at one end to a support bracket. This design of the support frame ensures a favorable support of the weight and acceleration forces occurring during operation, especially in the radial direction, and at the same time the fastening of the individual header sections can be achieved with a minimum weight of the support frame. Force support in the axial direction and guidance in this direction can also be achieved.

Vorzugsweise sind zwischen den einzelnen Sammelrohrabschnitten axial-elastische Dichtringe vorgesehen, die von Vorteil als gewellte Metallbälge (E-Seals) ausgeführt sind. Hierdurch ist eine Abdichtung auch größerer Dichtspalte bei gleichzeitig guter Temperaturfestigkeit der Dichtung gewährleistet. Ein wesentlicher Vorteil der elastischen Dichtringe ist, daß diese durch Temperaturschwankungen hervorgerufene Axialbewegungen ausgleichen können.Axial-elastic sealing rings are preferably provided between the individual header sections, which are advantageously designed as corrugated metal bellows (E-seals). This means that even larger sealing gaps can be sealed with good temperature resistance the seal ensures. A major advantage of the elastic sealing rings is that they can compensate for axial movements caused by temperature fluctuations.

Die Stützrohre bestehen vorzugsweise aus einzelnen Stützrohrabschnit­ten, die zwischen je zwei Stützträgern angeordnet und mit diesen fest verbunden sind, vorzugsweise mittels Schrauben. Durch diese Aufteilung der Stützrohre in einzelne Abschnitte ähnlich den Sammelrohren ist es einerseits möglich die Stützträger vorteilhaft zu fertigen, und im Reparaturfall einfacher, den Wärmetauscher zu demontieren bzw. defekte Elemente auszutauschen. Die Stützträger können als Metallplatten aus­gebildet sein, die zwei Bohrungen zum Durchstecken der Sammelrohrab­schnitte aufweisen, oder sie können als Gußteile mit Ausnehmungen zur Materialeinsparung ausgeführt sein. Alternativ ist es auch möglich, die Stützrohre durchgehend, d. h. aus einem Stück zu fertigen, wenn dies zur Vereinfachung der Fertigung oder eine Verbesserung der Kraft­übertragung führt.The support tubes preferably consist of individual support tube sections which are arranged between two support beams and are firmly connected to them, preferably by means of screws. This division of the support pipes into individual sections similar to the header pipes makes it possible, on the one hand, to advantageously produce the support beams and, in the event of repairs, to dismantle the heat exchanger or replace defective elements. The support beams can be designed as metal plates that have two bores for pushing through the header sections, or they can be designed as castings with recesses to save material. Alternatively, it is also possible to support the support tubes continuously, i. H. to be made from one piece if this leads to simplification of the production or an improvement in the power transmission.

Die Stützrohre haben vorteilhafterweise runden oder ovalen Quer­schnitt, wobei bei Verwendung eines ovalen Querschnittes die Rohre mit ihrem größeren Biegewiderstandsmoment in Richtung der zu erwartenden Belastung ausgerichtet sind. Es ist auch denkbar, eines der beiden Stützrohre oval, daß andere rund zu fertigen oder andere Querschnitts­formen, beispielsweise Quadrate oder Rechtecke zur Anwendung kommen zu lassen. Vorzugsweise sind die Stützrohre derart beidseitig der Sammel­rohre angeordnet, daß die Längsachsen aller Rohre in einer Ebene (Achsebene) liegen. Dies hat den Vorteil, daß der Wärmetauscher mit horizontal übereinander angeordneten Sammelrohren so aufgehängt werden kann, daß er außenseitig von senkrecht anströmendem Heißgas beauf­schlagbar ist. Die Gewichtskräfte des Wärmetauschers werden dabei durch die ober- und unterhalb angeordneten Stützrohre aufgenommen, wobei in senkrechter Richtung die größte Steifigkeit des Trägerrahmens ausgenutzt wird.The support tubes advantageously have a round or oval cross section, wherein when using an oval cross section, the tubes are aligned with their greater bending moment of resistance in the direction of the expected load. It is also conceivable for one of the two oval support tubes to be used to make others round or to use other cross-sectional shapes, for example squares or rectangles. The support tubes are preferably arranged on both sides of the header tubes in such a way that the longitudinal axes of all tubes lie in one plane (axis plane). This has the advantage that the heat exchanger can be suspended with manifolds arranged horizontally one above the other in such a way that it can be acted upon by hot gas flowing vertically on the outside. The weight forces of the heat exchanger are absorbed by the support tubes arranged above and below, the greatest rigidity of the support frame being used in the vertical direction.

Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß mit je zwei Stützträgern verbundene Querversteifungsbleche vorgesehen sind, die mittig zwischen den Sammelrohren senkrecht zur Achsebene ausgerichtet sind. Diese Anordnung vergrößert die Biegesteifigkeit des gesamten Wärmetauschers um die in der Achsebene liegende Querachse. Ferner werden durch diese in axialer Richtung ebenfalls Zugkräfte übertragen.A further advantageous embodiment of the invention provides that transverse stiffening plates are provided, each with two support beams, which are aligned centrally between the header tubes perpendicular to the axis plane. This arrangement increases the bending stiffness of the entire heat exchanger about the transverse axis lying in the axial plane. Furthermore, tensile forces are also transmitted in the axial direction.

Vorzugsweise sind an den Stoßstellen benachbarter Sammelrohrabschnitte diese umgebene Führungshülsen vorgesehen, die mit den Stützträgern fest verbunden sind, und an denen Mittel zur Fixierung eines der bei­den Sammelrohrabschnitte angebracht sind. Die Führungshülsen dienen einerseits zur axialen Führung der Sammelrohrabschnitte bei thermi­schen Bewegungen, als auch der Aufnahme und Fixierung der zwischen den einzelnen Sammelrohrabschnitten vorgesehenen Dichtungselementen. Die Führungshülsen können dabei an den Stützträgern angeschweißt oder angeschraubt sein, und sind zur Gewichtseinsparung so kurz wie möglich ausgeführt. Die Mitte zur Fixierung der Sammelrohrabschnitte sind vorzugsweise als Nut-Federelement ausgeführt, die eine leichte Aus­wechselbarkeit gewährleistet.Preferably, the surrounding guide sleeves are provided at the joints of adjacent header sections, which are fixedly connected to the support beams and to which means for fixing one of the two header sections are attached. The guide sleeves serve on the one hand for axially guiding the header sections during thermal movements, and also for receiving and fixing the sealing elements provided between the individual header sections. The guide sleeves can be welded or screwed to the support beams and are made as short as possible to save weight. The center for fixing the header sections is preferably designed as a tongue and groove element, which ensures easy interchangeability.

Gemäß einer weiteren erfindungsgemäßen Ausbildung sind Verbindungs­stutzen zur Ankopplung der Sammelrohre an Zu- bzw. Abströmleitungen in der Mitte der Sammelrohre angebracht. Dabei ist es möglich, nur ein Verbindungsstutzen an jedem Sammelrohr vorzusehen, oder je zwei Ver­bindungsstutzen anzubringen, die sich bezüglich der Sammelrohre gegen­überliegen. Der Vorteil dieser Anordnung liegt in der günstigen Durch­strömung der Sammelrohre, da jeweils für die Hälfte des Strömungs­mediums in jeder Richtung fließen muß, und die sich zwangsläufig ent­lang der Sammelrohrlänge ergebenden Strömungsverluste reduziert wer­den. Außerdem ist eine gleichmäßigere Durchströmung der Profilrohre gewährleistet als gegenüber einer Einspeisung des Gases an nur einem axialen Sammelrohrende. Die gleichen Vorteile ergeben sich, wenn die Verbindungstutzen an beiden axialen Enden jeden Sammelrohres ange­bracht sind.According to a further embodiment of the invention, connecting pieces for coupling the collecting pipes to inflow and outflow lines are attached in the middle of the collecting pipes. It is possible to provide only one connecting piece on each manifold, or to attach two connecting pieces that are opposite each other with respect to the collecting pipes. The advantage of this arrangement lies in the favorable flow through the collecting tubes, since half of the flow medium must flow in each direction, and the flow losses which inevitably result along the length of the collecting tube are reduced. There is also a more even flow through the profile tubes guaranteed as compared to a feed of the gas at only one axial header pipe end. The same advantages result if the connecting pieces are attached to both axial ends of each header pipe.

Die Erfindung wird nachfolgend anhand der beigefügten Zeichnung weiter erläutert: Dabei zeigt:

  • Figur 1 : Ein Querschnitt durch einen Wärmetauscher,
  • Figur 2 : einen Längsschnitt durch den Wärmetauscher,
  • Figur 3 : eine Detailansicht gemäß Figur 2,
  • Figur 4 : einen Längsschnitt durch einen Sammelrohr,
  • Figur 5 : eine Ansicht von Querversteifungsblechen,
  • Figur 6 : einen Querschnitt durch einen weiteren Wärmetauscher.
The invention is explained in more detail below with reference to the accompanying drawing:
  • FIG. 1: a cross section through a heat exchanger,
  • FIG. 2: a longitudinal section through the heat exchanger,
  • FIG. 3: a detailed view according to FIG. 2,
  • FIG. 4: a longitudinal section through a collecting tube,
  • FIG. 5: a view of transverse stiffening sheets,
  • Figure 6: a cross section through a further heat exchanger.

Der in Figur 1 dargestellten Wärmetauscher 1 besteht im wesentlichen aus zwei Sammelrohren 2a, 2b, die über zwei U- förmig verlaufende Profilrohrbündel 3 miteinander strömungsmäßig verbunden sind. Im Be­trieb strömt ein Gas vom Sammelrohr 2a über die beide Profilrohr­bündel 3 zum Sammelrohr 2b und erwärmt sicht dadurch, wobei gleichzei­tig außen in der mit 4 bezeichneten Richtung Heißgas im Kreuz/Gegen­strom außenseitig an den Profilrohrbündeln 3 vorbeigeführt wird. Beid­seitig der Sammelrohre 2a, 2b sind zwei parallel zu den Sammelrohren 2a, 2b belaufende Stützrohre 5,6 vorgesehen, die über Stützträger 7 verbunden sind. Die Stützrohre 5 und 6 weisen Befestigungsflansche 8a, 8b auf, mittels denen diese an den Stützträgern 7 angebracht sind. Mittig zwischen den beiden Sammelrohren 2a, 2b sind senkrecht zur Blattebene sich erstreckende Querversteifungsbleche 9 vorgesehen.The heat exchanger 1 shown in FIG. 1 essentially consists of two header pipes 2a, 2b, which are connected to one another in terms of flow via two U-shaped profile tube bundles 3. In operation, a gas flows from the manifold 2a via the two profile tube bundles 3 to the manifold 2b and thereby heats up, while at the same time hot gas in cross / counterflow is passed outside the profile tube bundles 3 in the direction denoted by 4. Provided on both sides of the collecting tubes 2a, 2b are two supporting tubes 5, 6 running parallel to the collecting tubes 2a, 2b, which are connected via supporting beams 7. The support tubes 5 and 6 have mounting flanges 8a, 8b, by means of which these are attached to the support beams 7. In the middle between the two manifolds 2a, 2b, transverse stiffening plates 9 are provided which extend perpendicular to the plane of the sheet.

Bei dem in Figur 2 dargestellten Längsschnitt durch den Wärmetauscher 1 ist erkennbar, daß die Sammelrohre 2a, 2b aus einer Vielzahl axial hintereinander angeordneter Sammelrohrabschnitte 10 und 11 bestehen. An den Stoßstellen benachbarter Sammelrohrabschnitte 10,11 sind die plattenförmigen Stützträger 7 vorgesehen, die jeweils zwei Ausneh­mungen 24 sowie Führungshülsen 15,16 für die Sammelrohre 2a, 2b auf­weisen.In the longitudinal section through the heat exchanger 1 shown in FIG. 2, it can be seen that the header pipes 2a, 2b consist of a plurality of header pipe sections 10 and 11 arranged axially one behind the other. The plate-shaped support beams 7 are provided at the joints of adjacent header sections 10, 11, each having two recesses 24 and guide sleeves 15, 16 for the header tubes 2a, 2b.

Die Stützrohre 5 und 6 bestehen ebenfalls aus einzelnen Abschnitten, den Stützrohrabschnitten 12,13, die etwa die gleiche Länge wie die Sammelrohrabschnitte 10,11 aufweisen. Im Gegensatz zu den Sammel­rohrabschnitten 10,11 müssen die Innenräume der Stützrohrabschnitte 12,13 jedoch nicht miteinander verbunden sein, das heißt die Stützträ­ger 7 weisen keine entsprechenden Ausnehmungen auf. Zum Zwecke der Gewichtseinsparungen wäre dies jedoch denkbar. An den Stützrohrab­schnitten 12,13 sind, vorzugsweise axial, Befestigungsflansche 8a, 8b angeschweißt, mittels der die Stützrohrabschnitte 12,13 über Befesti­gungselemente 14 an den Stützträgern 7 angebracht sind. Die Stützrohre 5,6, die Stützträger 7 sowie die Querversteifungsbleche 9 bilden zu­sammen den Trägerrahmen, der zur Abstützung des Wärmetauschers 1 dient und über nicht dargestellte Befestigungsvorrichtungen ortsfest abge­stützt ist.The support pipes 5 and 6 likewise consist of individual sections, the support pipe sections 12, 13, which have approximately the same length as the header pipe sections 10, 11. In contrast to the header pipe sections 10, 11, however, the interior spaces of the support pipe sections 12, 13 do not have to be connected to one another, that is to say the support beams 7 have no corresponding recesses. However, this would be conceivable for the purpose of saving weight. Fastening flanges 8a, 8b are welded onto the support tube sections 12, 13, preferably axially, by means of which the support tube sections 12, 13 are attached to the support beams 7 via fastening elements 14. The support tubes 5, 6, the support beams 7 and the cross-bracing plates 9 together form the support frame which serves to support the heat exchanger 1 and is supported in a stationary manner by means of fastening devices (not shown).

An den Stützträgern 7 sind ferner Führungshülsen 15,16 angebracht, in die gleitverschieblich die Sammelrohrabschnitte 10 und 11 passen.Guide sleeves 15, 16 are also attached to the support beams 7, into which the manifold sections 10 and 11 fit slidably.

Die Sammelrohre 2a, 2b sind einendig mit Verbindungsstutzen 17a, b zur Zuführung bzw. Abführung von wärmetauschendem Gas versehen, und am anderen Ende ist im axial letzten Sammelrohrabschnitt 10,11 je ein Rohrboden 18a, b angeschweißt, der sich in einem angepaßten End­stück 19 abstützt, wobei die Endstücke 19 im ersten Stützträger 7 befestigt sind.The manifolds 2a, 2b are provided at one end with connecting pieces 17a, b for the supply or discharge of heat-exchanging gas, and at the other end there is one each in the axially last manifold section 10,11 Welded tube sheet 18a, b, which is supported in an adapted end piece 19, the end pieces 19 being fastened in the first support beam 7.

Bei dem in Figur 3 dargestellten vergrößerten Ausschnitt aus Figur 2 ist insbesondere die Lagerung der Sammelrohrabschnitte 10 in der Füh­rungshülse 15 zu erkennen. Die am Stützträger 7 angeschweißte Führungshülse 15 ist über eine Schraubverbindung 20 mit einem ringab­schnittartigen Federelement 21 verbunden, welches in einer entspre­chend ausgebildeten Nut 22 des Sammelrohrabschnittes 10 eingelassen ist und somit deren Kräfte über die Führungshülse 15 an den Stützträ­ger 7, und von diesen weiter auf die Stützrohrabschnitte 12 überträgt.The enlarged section from FIG. 2 shown in FIG. 3 shows in particular the mounting of the header sections 10 in the guide sleeve 15. The guide sleeve 15 welded to the support bracket 7 is connected via a screw connection 20 to an annular section-like spring element 21, which is let into a correspondingly designed groove 22 of the header pipe section 10 and thus their forces via the guide sleeve 15 to the support bracket 7, and from there onto the Support tube sections 12 transmits.

Zum Ausgleich von axialen Dehnungen stoßen die Sammelrohrabschnitte 10 nicht direkt aufeinander, sondern weisen einen gewissen Spalt auf, in dem eine axial-elastische Metallbalgdichtung 23 vorgesehen ist.To compensate for axial expansions, the header sections 10 do not directly meet one another, but instead have a certain gap in which an axially elastic metal bellows seal 23 is provided.

In Figur 4 ist ein weiterer Längsschnitt durch den Wärmetauscher 1 gezeigt, der senkrecht zu dem Schnitt gemäß Figur 2 gelegt wurde. Dabei ist insbesondere zu erkennen, wie an den einzelnen Sammel­rohrabschnitten 10 einzelne Profilrohrbündel 3 angebracht sind.FIG. 4 shows a further longitudinal section through the heat exchanger 1, which was placed perpendicular to the section according to FIG. 2. It can be seen in particular how individual profile tube bundles 3 are attached to the individual header tube sections 10.

In Figur 5 sind die zwischen den einzelnen Stützträgern 7 angebrachten Versteifungsbleche 9 näher dargestellt. Diese weisen zur Gewichtsredu­zierung eine Anzahl von Ausnehmungen 24 auf, und haben zur Vergröße­rung des Widerstandes gegen ausknicken - wie in Figur 1 besser darge­stellt, Rippen 25 zur Bildung eines im Querschnitt H-förmigen Profils. Die Querverstärkungsbleche 9 sind über Schrauben 26 lösbar an den Stützträgern angebracht.In Figure 5, the stiffening plates 9 attached between the individual support beams 7 are shown in more detail. These have a number of recesses 24 to reduce weight, and have ribs 25 to increase the resistance to buckling - as better shown in FIG. 1 - to form a cross-sectionally H-shaped profile. The transverse reinforcement plates 9 are detachably attached to the support beams by means of screws 26.

In Figur 6 ist eine alternative Ausführungsform eines Stützträgers 7 gezeigt, der als Gußteil ausgeführt ist. Im oberen Teil ist ferner eine Ausführung der Erfindung dargestellt, bei der Verbindungsstutzen 17c, 17d im Gegensatz zu den in den bisherigen Figuren gezeigten Aus­führungen nicht an einem axialen Ende der Sammelrohre 2a, 2b ange­ordnet sind, sondern in deren axialen Mitte, wobei sie senkrecht zur Sammelrohraxialrichtung nach außen geführt sind. Im unteren Teil von Figur 6 ist ferner das ringabschüttartige Federelement 21 dargestellt, mittels dem das Sammelrohr 2b am Stützträger 7 über die Schraubver­bindungen 20 befestigt ist.In Figure 6, an alternative embodiment of a support beam 7 is shown, which is designed as a cast part. In the upper part is also An embodiment of the invention is shown, in which the connecting pieces 17c, 17d, in contrast to the designs shown in the previous figures, are not arranged at an axial end of the header pipes 2a, 2b, but in the axial center thereof, being guided outwards perpendicular to the header pipe axial direction . In the lower part of FIG. 6, the ring-like spring element 21 is also shown, by means of which the collecting tube 2b is fastened to the support bracket 7 via the screw connections 20.

Claims (15)

1. Wärmetauscher mit zwei parallel nebeneinander vorgesehenen Sammel­rohren, die miteinander über eine Vielzahl von bündelförmig ange­ordneten Profilrohren in Verbindung stehen, wobei die Sammelrohre aus mehreren axial hintereinander dichtend ausgerichteten Sammel­rohrabschnitten bestehen, dadurch gekennzeichnet, daß ein außer­halb der Sammelrohre (2a,b) angeordneter Trägerrahmen (5,6,7) vorgesehen ist, an dem die Sammelrohrabschnitte (10, 11) einzeln jeweils an beiden Rohrenden geführt und an einem Rohrende axial befestigt sind, wobei der Trägerrahmen (5,6,7) mindestens einen parallel zu den Sammelrohren (5,6) ausgerichteten Längsträger (5,6) aufweist, an dem eine Mehrzahl von beabstandeten Stützträ­gern (7) angebracht sind, die beide Sammelrohre (2a, b) im Bereich der Stoßstellen der Sammelrohrabschnitte (10,11) abstützen.1. Heat exchanger with two mutually parallel manifolds, which are connected to each other via a plurality of bundle-shaped profile tubes, the manifolds consisting of a plurality of axially sealingly aligned manifold sections, characterized in that an outside of the manifolds (2a, b) arranged support frame (5,6,7) is provided, on which the header sections (10, 11) are individually guided at both tube ends and axially fastened to one tube end, the support frame (5,6,7) at least one parallel to the header tubes ( 5.6) aligned longitudinal beam (5.6) on which a plurality of spaced support beams (7) are attached, which support both header tubes (2a, b) in the region of the joints of the header tube sections (10, 11). 2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß der Längsträger (5,6) aus zwei beidseitig parallel zu den Sammel­rohren (2a,b) angeordneten Stützrohren (5, 6) besteht, die über die Stützträger (7) miteinander verbunden sind, und jeder Sammel­rohrabschnitt (10,11) an einem Stützträger (7) befestigt ist.2. Heat exchanger according to claim 1, characterized in that the longitudinal member (5, 6) consists of two support tubes (5, 6) arranged on both sides parallel to the header tubes (2a, b), which are connected to one another via the support members (7), and each header section (10, 11) is attached to a support bracket (7). 3. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwischen den einzelnen Sammelrohrabschnitten (10, 11) axial-elastische Dichtringe (23) vorgesehen sind.3. Heat exchanger according to claim 1 or 2, characterized in that axially elastic sealing rings (23) are provided between the individual header sections (10, 11). 4. Wärmetauscher nach Anspruch 3, dadurch gekennzeichnet, daß die Dichtringe (23) gewellte Metallbälge (E-seals) sind.4. Heat exchanger according to claim 3, characterized in that the sealing rings (23) are corrugated metal bellows (E-seals). 5. Wärmetauscher nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Dichtringe (23) im Bereich der Stützträger (7) angeordnet sind.5. Heat exchanger according to claim 2 or 3, characterized in that the sealing rings (23) are arranged in the region of the support bracket (7). 6. Wärmetauscher nach Anspruch 2, dadurch gekennzeichnet, daß die Stützrohre (5, 6) aus einzelnen Stützrohrabschnitten (12, 13) aufgebaut sind, die zwischen je zwei Stützträgern (7) angeordnet und mit diesen fest verbunden sind.6. Heat exchanger according to claim 2, characterized in that the support tubes (5, 6) from individual support tube sections (12, 13) are constructed, which are arranged between two support beams (7) and are firmly connected to these. 7. Wärmetauscher nach Anspruch 2, dadurch gekennzeichnet, daß die Stützträger (7) plattenförmig ausgebildet sind.7. Heat exchanger according to claim 2, characterized in that the support beams (7) are plate-shaped. 8. Wärmetauscher nach Anspruch 2, dadurch gekennzeichnet, daß die Stützträger (7) als Gußteile ausgeführt sind.8. Heat exchanger according to claim 2, characterized in that the support beams (7) are designed as castings. 9. Wärmetauscher nach Anspruch 2, dadurch gekennzeichnet, daß die Stützrohre (5, 6) runden ovalen oder rechteckigen Querschnitt haben.9. Heat exchanger according to claim 2, characterized in that the support tubes (5, 6) have a round oval or rectangular cross section. 10. Wärmetauscher nach Anspruch 2, dadurch gekennzeichnet, daß die Stützrohre (5, 6) derart beidseitig der Sammelrohre (2a, b) ange­ordnet sind, daß die Längsachsen aller Rohre (2a, 2b, 5, 6) in einer Ebene (Achsebene) liegen.10. Heat exchanger according to claim 2, characterized in that the support tubes (5, 6) are arranged on both sides of the header tubes (2a, b) in such a way that the longitudinal axes of all tubes (2a, 2b, 5, 6) in one plane (axis plane) lie. 11. Wärmetauscher nach Anspruch 10, dadurch gekennzeichnet, daß mit je zwei Stützträgern (7) verbundene Querversteifungsbleche (9) vorge­sehen sind, die mittig zwischen den Sammelrohren (2a, b) senkrecht zur Achsebene ausgerichtet sind.11. Heat exchanger according to claim 10, characterized in that with two support beams (7) connected cross stiffening plates (9) are provided, which are aligned centrally between the header tubes (2a, b) perpendicular to the axis plane. 12. Wärmetauscher nach Anspruch 7, dadurch gekennzeichnet, daß an den Stoßstellen benachbarter Sammelrohrabschnitte (10, 11) diese umge­bende Führungshülsen (15, 16) vorgesehen sind, die mit den Stütz­trägern (7) fest verbunden sind, und an denen Mittel zur Fixierung eines oder beider Sammelrohrabschnitte (10, 11) angebracht sind.12. Heat exchanger according to claim 7, characterized in that at the joints of adjacent manifold sections (10, 11) surrounding guide sleeves (15, 16) are provided, which are fixedly connected to the support beams (7), and on which means for fixing a or both header sections (10, 11) are attached. 13. Wärmetausch nach Anspruch 1, dadurch gekennzeichnet, daß Verbin­dungsstutzen (17a, b) zur Ankopplung der Sammelrohre (2a, b) an Zu- bzw. Abströmleitungen in der axialen Mitte der Sammelrohre (2a, b) angebracht sind.13. Heat exchange according to claim 1, characterized in that connecting pieces (17a, b) for coupling the manifolds (2a, b) to inflow and outflow lines in the axial center of the manifolds (2a, b) are attached. 14. Wärmetauscher nach Anspruch 14, dadurch gekennzeichnet, daß je zwei sich bezüglich des Sammelrohres (2a, b) gegenüberliegende Verbindungsstutzen (17a, b) an diesem angebracht sind.14. Heat exchanger according to claim 14, characterized in that two connection pieces (17a, b) opposite each other with respect to the collecting pipe (2a, b) are attached to the latter. 15. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß Verbin­dungsstutzen (17a, b) zur Ankopplung der Sammelrohre (2a, b) an Zu- bzw. Abströmleitungen an beiden axialen Enden jedes Sammel­rohres (2a, b) angebracht sind.15. Heat exchanger according to claim 1, characterized in that connecting pieces (17a, b) for coupling the manifolds (2a, b) to inflow and outflow lines are attached to both axial ends of each manifold (2a, b).
EP90106097A 1989-04-07 1990-03-30 Heat-exchanger Expired - Lifetime EP0391266B1 (en)

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Also Published As

Publication number Publication date
DE3911257C2 (en) 1994-05-26
ES2038460T3 (en) 1993-07-16
EP0391266B1 (en) 1993-02-10
US4986344A (en) 1991-01-22
DE59000864D1 (en) 1993-03-25
JP2776952B2 (en) 1998-07-16
DE3911257A1 (en) 1990-10-11
JPH02287093A (en) 1990-11-27

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