EP0192212A1 - Spiral heat exchanger - Google Patents

Spiral heat exchanger Download PDF

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Publication number
EP0192212A1
EP0192212A1 EP86101948A EP86101948A EP0192212A1 EP 0192212 A1 EP0192212 A1 EP 0192212A1 EP 86101948 A EP86101948 A EP 86101948A EP 86101948 A EP86101948 A EP 86101948A EP 0192212 A1 EP0192212 A1 EP 0192212A1
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EP
European Patent Office
Prior art keywords
spiral
heat exchanger
flow
spirals
partition walls
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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.)
Granted
Application number
EP86101948A
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German (de)
French (fr)
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EP0192212B1 (en
Inventor
Jürgen Prof. Dr.-Ing. Michele
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.)
Heiner Grote Te Edewecht Bondsrepubliek Duitsland
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Grote Heiner
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Priority to AT86101948T priority Critical patent/ATE38093T1/en
Publication of EP0192212A1 publication Critical patent/EP0192212A1/en
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Publication of EP0192212B1 publication Critical patent/EP0192212B1/en
Expired legal-status Critical Current

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/398—Spirally bent heat exchange plate

Definitions

  • the invention relates to a recuperative spiral heat exchanger, with partition walls running in a spiral shape between the fluid material flows which have the usable temperature gradient, two adjacent partition walls each including a flow channel for one of the two material flows between them and the spiral space located between two flow channels the flow path for the other Flow forms.
  • Spiral heat exchangers are known. Such heat exchangers with spirally arranged flow channels can advantageously be operated in the countercurrent principle and thereby enable large exchange areas in a small space.
  • a spiral heat exchanger has the disadvantage that the flow paths lying in a spiral and therefore relatively long lead to high pressure losses. Long flow paths also make it difficult to securely seal the heat exchanger. Its cleaning is problematic and the operation with higher pressure differences requires an above-average design and construction effort.
  • the invention has for its object to design a spiral heat exchanger so that the disadvantages mentioned do not occur.
  • the spiral is designed as a multi-start or multi-arm spiral by arranging a plurality of flow channels.
  • each material flow can be divided between the spiral arms, with the advantage that either the spiral flow channels between the inlet and outlet of the respective material flow are relatively short, or a correspondingly higher throughput is possible, both advantages without reducing the actual heat exchanger area can be achieved, the dimensions of which must be adapted to the achievable order of magnitude of the performance of a heat exchanger.
  • a spiral heat exchanger designed in accordance with the invention can thus achieve the full performance for which it is designed, owing to the given heat exchanger surface, without the disadvantages of conventional spiral heat exchangers of conventional design to be accepted.
  • a heat exchanger designed with a multi-course spiral also has the advantage that it can be manufactured easily since the individual flow channels are relatively short and consequently the bending of the partition walls into the spiral shape is also easy because the individual turns are only slightly intertwined.
  • the spiral heat exchanger is further improved in that it consists of two multi-course spirals which have opposite directions of rotation.
  • each flow channel within one of the spirals can be even shorter, since the total length of each flow channel can be predetermined by its course within both spirals.
  • the connection of two opposing spirals gives each flow channel an approximately S-shaped course, with the S-bends each lying within one of the spirals.
  • spiral formation of the heat exchanger surfaces facilitates their manufacture and enables relatively inexpensive manufacture.
  • the spirals are preferably e.g. bent from sheet metal strips standing upright next to each other, two sheet metal strips each enclosing a flow channel between them, which is covered at the top and bottom by a cover, e.g. outer housing walls, is closed.
  • the inflow and outflow openings are each arranged in a housing area corresponding to the center of the spirals.
  • Corresponding line connections e.g. Connection pieces can be provided.
  • the drawing shows a schematic sectional view of a spiral heat exchanger with a lower housing wall 1 and box-shaped side walls 2.
  • the heat exchanger surfaces are arranged spirally in the manner shown.
  • a material flow can be supplied via inflow openings 3 - 3 '''. Since there are four inflow openings and a flow channel 4 - 4 '''is connected to each of the inflow openings 3 - 3''', the material flow supplied is distributed over the four flow channels, each of which has two adjacent partition walls 5, 6, here referred to the example of the flow channel 4, limited.
  • the flow channels 4 - 4 "'are interlaced in a spiral and thus form a multi-course, clockwise spiral. Between the individual flow channels 4 - 4"' there are free spiral spaces, which also serve as flow channels for a second stream of material that passes through the opening 9 is directed.
  • This second stream of material is fed through a single inflow opening of larger diameter, which is arranged in the left, counterclockwise spiral and is designated by 7.
  • This second spiral has the outflow openings 8 - 8 '' ', via which the first stream of material which enters via the inflow openings 3 - 3' '' of the right spiral is discharged again.
  • the outflow opening 8 is thus located at the end of the flow channel 4, which branches off from the inflow opening 3.
  • the remaining, respectively assigned inflow and outflow openings 3 '- 3 "' and 8 '- 8"' each have the same index.
  • the second stream of material flowing in via the larger inflow opening 7 in the left spiral enters the spiral spaces between the flow channels in regions indicated schematically by arrows and flows through the spiral spaces to the right spiral and thus in counterflow to the stream of material supplied to the right spiral, where it flows through the outflow opening 9 located there emerges again from the housing of the 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)

Abstract

Sei einem rekuperativen Spiralwärmetauscher mit in Spiralform verlaufenden Trennwänden (5,6) zwischen den das ausnutzbare Temperaturgefälle aufweisenden fluiden Stoffströme, wobei zwei zueinander benachbarte Trennwände (5,6) jeweils einen Strömungskanal (4,4',4",4‴)für einen der beiden Stoffströme zwischen sich einschließen und der zwischen zwei Strömungskanälen befindliche Spiralraum den Strömungsweg für den jeweils anderen Stoffstrom bildet, ist die Spirale durch Anordnung mehrerer Strömungskanäle (4,4',4",4‴)als mehrgängige bzw, mehrarmige Spirale ausgebildet. Insbesondere besteht er aus zwei mehrgängigen Spiralen, die einander entgegengesetzten Drehsinn aufweisen.Be a recuperative spiral heat exchanger with partition walls (5,6) running in a spiral shape between the fluid material flows that have the usable temperature gradient, two adjacent partition walls (5,6) each having a flow channel (4,4 ', 4 ", 4 ‴) for one of the two material flows between them and the spiral space located between two flow channels forms the flow path for the respective other material flow, the spiral is designed as a multi-path or multi-arm spiral by arranging several flow channels (4,4 ', 4 ", 4 ‴). In particular, it consists of two multi-start spirals that have opposite directions of rotation.

Description

Die Erfindung betrifft einen rekuperativen Spiralwärmetauscher, mit in Spiralform verlaufenden Trennwänden zwischen den das ausnutzbare Temperaturgefälle aufweisenden fluiden Stoffströmen, wobei zwei zueinander benachbarte Trennwände jeweils einen Strömungskanal für einen der beiden Stoffströme zwischen sich einschließen und der zwischen zwei Strömungskanälen befindliche Spiralraum den Strömungsweg für den jeweils anderen Stoffstrom bildet.The invention relates to a recuperative spiral heat exchanger, with partition walls running in a spiral shape between the fluid material flows which have the usable temperature gradient, two adjacent partition walls each including a flow channel for one of the two material flows between them and the spiral space located between two flow channels the flow path for the other Flow forms.

Spiralwärmetauscher sind bekannt. Derartige Wärmetauscher mit spiralförmig angeordneten Strömungskanälen lassen sich mit Vorteil im Gegenstromprinzip betreiben und ermöglichen dabei große Austauschflächen auf kleinem Raum.Spiral heat exchangers are known. Such heat exchangers with spirally arranged flow channels can advantageously be operated in the countercurrent principle and thereby enable large exchange areas in a small space.

Ein Spiralwärmetauscher hat jedoch den Nachteil, daß die in einer Spirale liegenden und somit verhältnismäßig langen Strömungswege zu hohen Druckverlusten führen. Lange Strömungswege erschweren auch die sichere Abdichtung des Wärmetauschers. Seine Reinigung ist problematisch und der Betrieb mit höheren Druckdifferenzen erfordert einen überdurchschnittlichen Konstruktions- und Bauaufwand.However, a spiral heat exchanger has the disadvantage that the flow paths lying in a spiral and therefore relatively long lead to high pressure losses. Long flow paths also make it difficult to securely seal the heat exchanger. Its cleaning is problematic and the operation with higher pressure differences requires an above-average design and construction effort.

Die vorgenannten Nachteile haben dazu geführt, daß sich Spiralwärmetauscher bisher nicht durchsetzen konnten.The aforementioned disadvantages have meant that spiral heat exchangers have so far not been able to establish themselves.

Der Erfindung liegt die Aufgabe zugrunde, einen Spiralwärmetauscher so auszubilden, daß die genannten Nachteile nicht auftreten.The invention has for its object to design a spiral heat exchanger so that the disadvantages mentioned do not occur.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst worden, daß die Spirale durch Anordnung mehrerer Strömungskanäle als mehrgängige bzw. mehrarmige Spirale ausgebildet ist.This object has been achieved according to the invention in that the spiral is designed as a multi-start or multi-arm spiral by arranging a plurality of flow channels.

Bei einem derartig ausgebildeten Spiralwärmetauscher kann jeder Stoffstrom auf die Spiralarme aufgeteilt werden, mit dem Vorteil, daß entweder die spiralförmigen Strömungskanäle zwischen Eintritt und Austritt des jeweiligen Stoffstroms relativ kurz sind, oder ein entsprechend höherer Durchsatz möglich ist, wobei beide Vorteile ohne Verkleinerung der eigentlichen Wärmeaustauscherfläche erreicht werden, deren Abmessung der erreichbaren Größenordnung der Leistung eines Wärmetauschers angepaßt sein muß. Ein erfindungsgemäß ausgebildeter Spiralwärmetauscher kann somit die volle Leistung, für die er ausgelegt ist, aufgrund der gegebenen Wärmetauscherfläche erbringen, ohne daß die Nachteile bisher üblicher Spiralwärmetauscher herkömmlicher Bauart in Kauf zu nehmen sind.In a spiral heat exchanger designed in this way, each material flow can be divided between the spiral arms, with the advantage that either the spiral flow channels between the inlet and outlet of the respective material flow are relatively short, or a correspondingly higher throughput is possible, both advantages without reducing the actual heat exchanger area can be achieved, the dimensions of which must be adapted to the achievable order of magnitude of the performance of a heat exchanger. A spiral heat exchanger designed in accordance with the invention can thus achieve the full performance for which it is designed, owing to the given heat exchanger surface, without the disadvantages of conventional spiral heat exchangers of conventional design to be accepted.

Ein mit einer mehrgängigen Spirale ausgebildeter Wärmetauscher weist auch den Vorteil auf, daß er einfach hergestellt werden kann, da die einzelnen Strömungskanäle relativ kurz sind und demzufolge das Biegen der Trennwände in die Spiralform auch einfach ist, weil die einzelnen Windungen nur wenig ineinander liegen.A heat exchanger designed with a multi-course spiral also has the advantage that it can be manufactured easily since the individual flow channels are relatively short and consequently the bending of the partition walls into the spiral shape is also easy because the individual turns are only slightly intertwined.

Nach einer Weiterbildung wird der Spiralwärmetauscher noch dadurch verbessert, daß er aus zwei mehrgängigen Spiralen besteht, die einander entgegengesetzten Drehsinn aufweisen.According to a further development, the spiral heat exchanger is further improved in that it consists of two multi-course spirals which have opposite directions of rotation.

Durch diese Maßnahme lassen sich die Bauabmessungen der Spiralen noch weiter verringern und relativ große Wärmetauscherflächen auf engstem Raum unterbringen. Jeder Strömungskanal innerhalb einer der Spiralen kann noch kürzer sein, da die Gesamtlänge eines jeden Strömungskanals durch seinen Verlauf innerhalb beider Spiralen vorgebbar ist. Durch die Verbindung von zwei gegenläufigen Spiralen erhält jeder Strömungskanal einen etwa S-förmigen Verlauf, wobei die S-Bögen jeweils innerhalb einer der Spiralen liegen.This measure allows the construction dimensions of the spirals to be reduced even further and the heat exchanger surface to be relatively large place in a confined space. Each flow channel within one of the spirals can be even shorter, since the total length of each flow channel can be predetermined by its course within both spirals. The connection of two opposing spirals gives each flow channel an approximately S-shaped course, with the S-bends each lying within one of the spirals.

Diese Art der Spiralbildung der Wärmetauscherflächen erleichtert deren Herstellung und ermöglicht eine verhältnismäßig kostengünstige Fertigung. Die Spiralen sind vorzugsweise z.B. aus hochkant nebeneinanderstehenden Blechbändern gebogen, wobei jeweils zwei Blechbänder zwischen sich einen Strömungskanal einschließen, der oben und unten durch eine Abdeckung, z.B. äußere Gehäusewände, verschlossen ist.This type of spiral formation of the heat exchanger surfaces facilitates their manufacture and enables relatively inexpensive manufacture. The spirals are preferably e.g. bent from sheet metal strips standing upright next to each other, two sheet metal strips each enclosing a flow channel between them, which is covered at the top and bottom by a cover, e.g. outer housing walls, is closed.

Beide Spiralen können somit in vorteilhaft einfacher Weise in einem geschlossenen Gehäuse angeordnet sein. Der Wärmetauscher ist dadurch ein besonders kompaktes Bauteil, das hohen Leistungsanforderungen genügt. Die Verwendung in klimatechnischen Anlagen und sonstigen Einsatzgebieten ist denkbar, wobei insbesondere das Gebiet niedriger Abwärmetemperaturen bei Gasen in Frage kommt.Both spirals can thus be arranged in an advantageously simple manner in a closed housing. This makes the heat exchanger a particularly compact component that meets high performance requirements. Use in air conditioning systems and other areas of application is conceivable, with the area of low waste heat temperatures for gases being particularly suitable.

Die Zuström- und Abströmöffnungen sind jeweils in einem dem Zentrum der Spiralen entsprechenden Gehäusebereich angeordnet. Entsprechende Leitungsanschlüsse, z.B. Anschlußstutzen, können vorgesehen werden.The inflow and outflow openings are each arranged in a housing area corresponding to the center of the spirals. Corresponding line connections, e.g. Connection pieces can be provided.

Ein Ausführungsbeispiel, aus dem sich weitere erfinderische Merkmale ergeben, ist in der Zeichnung dargestellt.An embodiment from which further inventive features result is shown in the drawing.

Die Zeichnung zeigt eine schematische Schnittansicht eines Spiralwärmetauschers mit einer unteren Gehäusewand 1 und kastenförmigen Seitenwänden 2. Bei diesem Ausführungsbeispiel sind die Wärmetauscherflächen in der gezeigten Weise spiralförmig angeordnet. Über Zuströmöffnungen 3 - 3''' kann ein Stoffstrom zugeführt werden. Da vier Zuströmöffungen vorhanden sind, und an jede der Zuströmöffnungen 3 - 3''' jeweils ein Strömungskanal 4 - 4''' angeschlossen ist, verteilt sich der zugeführte Stoffstrom auf die vier Strömungskanäle, die von jeweils zwei nebeneinanderliegenden Trennwänden 5, 6, hier am Beispiel des Strömungskanals 4 bezeichnet, begrenzt werden. Die Strömungskanäle 4 - 4"' sind spiralförmig ineinandergelegt und bilden somit eine mehrgängige, im Uhrzeigersinn verlaufende Spirale. Zwischen den einzelnen Strömungskanälen 4 - 4''' befinden sich freie Spiralräume, die ebenfalls als Strömungskanäle für einen zweiten Stoffstrom dienen, der durch die öffnung 9 geleitet wird.The drawing shows a schematic sectional view of a spiral heat exchanger with a lower housing wall 1 and box-shaped side walls 2. In this embodiment the heat exchanger surfaces are arranged spirally in the manner shown. A material flow can be supplied via inflow openings 3 - 3 '''. Since there are four inflow openings and a flow channel 4 - 4 '''is connected to each of the inflow openings 3 - 3''', the material flow supplied is distributed over the four flow channels, each of which has two adjacent partition walls 5, 6, here referred to the example of the flow channel 4, limited. The flow channels 4 - 4 "'are interlaced in a spiral and thus form a multi-course, clockwise spiral. Between the individual flow channels 4 - 4"' there are free spiral spaces, which also serve as flow channels for a second stream of material that passes through the opening 9 is directed.

Dieser zweite Stoffstrom wird über eine einzige Zuströmmöffnung größeren Durchmessers, die in der linken, gegen den Uhrzeigersinn gewundenen Spirale angeordnet ist und mit 7 bezeichnet ist, zugeführt. Diese zweite Spirale weist die Abströmöffnungen 8 - 8''' auf, über die der erste Stoffstrom , der über die Zuströmöffnungen 3 - 3''' der rechten Spirale eintritt, wieder abgeleitet wird. Die Abströmöffnung 8 befindet sich somit am Ende des Strömungskanals 4, der von der Zuströmöffnung 3 abgeht. Die verbleibenden, jeweils einander zugeordneten Zuström- und Abströmöffnungen 3' - 3"' und 8' - 8"' weisen jeweils den gleichen Index auf.This second stream of material is fed through a single inflow opening of larger diameter, which is arranged in the left, counterclockwise spiral and is designated by 7. This second spiral has the outflow openings 8 - 8 '' ', via which the first stream of material which enters via the inflow openings 3 - 3' '' of the right spiral is discharged again. The outflow opening 8 is thus located at the end of the flow channel 4, which branches off from the inflow opening 3. The remaining, respectively assigned inflow and outflow openings 3 '- 3 "' and 8 '- 8"' each have the same index.

Der über die größere Zuströmöffnung 7 in der linken Spirale zuströmende zweite Stoffstrom tritt in durch Pfeile schematisiert angedeuteten Bereichen in die Spiralräume zwischen den Strömungskanälen ein und strömt durch die Spiralräume zur rechten Spirale und somit im Gegenstrom zu dem der rechten Spirale zugeführten Stoffstrom, wo er durch die dort befindliche Abströmöffnung 9 wieder aus dem Gehäuse des Wärmetauschers austritt.The second stream of material flowing in via the larger inflow opening 7 in the left spiral enters the spiral spaces between the flow channels in regions indicated schematically by arrows and flows through the spiral spaces to the right spiral and thus in counterflow to the stream of material supplied to the right spiral, where it flows through the outflow opening 9 located there emerges again from the housing of the heat exchanger.

Claims (5)

1. Rekuperativer Spiralwärmetauscher mit in Spiralform verlaufenden Trennwänden zwischen den das ausnutzbare Temperaturgefälle aufweisenden fluiden Stoffströmen, wobei zwei zueinander benachbarte Trennwände jeweils einen Strömungskanal für einen der beiden Stoffströme zwischen sich einschließen und der zwischen zwei Strömungskanälen befindliche Spiralraum den Strömungsweg für den jeweils anderen Stoffstrom bildet,
dadurch gekennzeichnet,
daß die Spirale durch Anordnung mehrerer Strömungskanäle (4, 4', 4", 4''') als mehrgängige, bzw. mehrarmige Spirale ausgebildet ist.1. recuperative spiral heat exchanger with partition walls running in a spiral shape between the fluid material flows which have the usable temperature gradient, two adjacent partition walls each enclosing a flow channel for one of the two material flows and the spiral space located between two flow channels forming the flow path for the other material flow,
characterized,
that the spiral is formed by arranging several flow channels (4, 4 ', 4 ", 4''') as a multi-start or multi-arm spiral. 2. Wärmetauscher nach Anspruch 1 dadurch gekennzeichnet, daß er aus zwei mehrgängigen Spiralen besteht, die einander entgegengesetzten Drehsinn aufweisen. 2nd Heat exchanger according to claim 1, characterized in that it consists of two multi-start spirals which have opposite directions of rotation. 3. Wärmetauscher nach Anspruch 1 und 2, dadurch gekennzeichnet, daß beide Spiralen in einem geschlossenen Gehäuse angeordnet sind.3. Heat exchanger according to claim 1 and 2, characterized in that both spirals are arranged in a closed housing. 4. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Zuström- und Abströmöffnungen (3 - 3''' und 8 - 8"'; 7 und 9) jeweils im dem Zentrum der Spiralen entsprechenden Gehäusebereich angeordnet sind.4. Heat exchanger according to one of the preceding claims, characterized in that inflow and outflow openings (3 - 3 '' 'and 8 - 8 "'; 7 and 9) are each arranged in the housing area corresponding to the center of the spirals. 5. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jede Spirale aus hochkant nebeneinanderstehenden Blechbändern gebogen ist.5. Heat exchanger according to one of the preceding claims, characterized in that each spiral is bent from sheet metal strips standing upright next to one another.
EP86101948A 1985-02-20 1986-02-15 Spiral heat exchanger Expired EP0192212B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86101948T ATE38093T1 (en) 1985-02-20 1986-02-15 SPIRAL HEAT EXCHANGER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853505789 DE3505789A1 (en) 1985-02-20 1985-02-20 SPIRAL HEAT EXCHANGER
DE3505789 1985-02-20

Publications (2)

Publication Number Publication Date
EP0192212A1 true EP0192212A1 (en) 1986-08-27
EP0192212B1 EP0192212B1 (en) 1988-10-19

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EP86101948A Expired EP0192212B1 (en) 1985-02-20 1986-02-15 Spiral heat exchanger

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US (1) US4679621A (en)
EP (1) EP0192212B1 (en)
JP (1) JPS61240093A (en)
AT (1) ATE38093T1 (en)
DE (2) DE3505789A1 (en)

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US5220955A (en) * 1989-08-12 1993-06-22 Dunsley Heat Limited Heat exchange apparatus
EP0678722A2 (en) * 1994-04-21 1995-10-25 Paul Grote Process for manufacturing a recuperative spiral heat-exchanger
GB2354315A (en) * 1999-06-18 2001-03-21 Galixbrook Engineering Ltd Heat exchanger core

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US20090308472A1 (en) * 2008-06-15 2009-12-17 Jayden David Harman Swirl Inducer
US8721981B2 (en) * 2009-11-30 2014-05-13 General Electric Company Spiral recuperative heat exchanging system
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US5220955A (en) * 1989-08-12 1993-06-22 Dunsley Heat Limited Heat exchange apparatus
EP0678722A2 (en) * 1994-04-21 1995-10-25 Paul Grote Process for manufacturing a recuperative spiral heat-exchanger
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Also Published As

Publication number Publication date
ATE38093T1 (en) 1988-11-15
EP0192212B1 (en) 1988-10-19
JPS61240093A (en) 1986-10-25
DE3660977D1 (en) 1988-11-24
US4679621A (en) 1987-07-14
DE3505789A1 (en) 1986-08-21

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