EP0864829A1 - Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas, und Verfahren zur Herstellung derselben - Google Patents
Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas, und Verfahren zur Herstellung derselben Download PDFInfo
- Publication number
- EP0864829A1 EP0864829A1 EP97810137A EP97810137A EP0864829A1 EP 0864829 A1 EP0864829 A1 EP 0864829A1 EP 97810137 A EP97810137 A EP 97810137A EP 97810137 A EP97810137 A EP 97810137A EP 0864829 A1 EP0864829 A1 EP 0864829A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exchange space
- piece
- housing
- spirals
- strands
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- 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
- F28D7/04—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 being spirally coiled
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
Definitions
- the present invention relates to a device for recovering heat from flue gas, with a housing enclosing an exchange space with an inlet and an outlet for a first medium, at least one structure that divides this exchange space Direction of this medium, a plurality of cable strands arranged in the exchange space for Passing through a second medium and connected to the wiring harnesses at least a collector and a distributor for summarizing and dividing the Wiring harnesses.
- the flue gas heat exchanger should be included in the production simple means larger or smaller according to the work to be performed can be.
- a heat exchanger which is characterized in that that the wiring harnesses are arranged in a spiral in the exchange space.
- spiral configuration of the cable strands is that the spiral is a represents very dense packing of lines, which expands radially and axially little space needed that is easy to manufacture and does not have to have any connections. Such spirals can be strung together so that different performance requirements correspondingly more or less spirals together form a heat exchange unit.
- Adjacent spirals advantageously have opposite directions of rotation, which makes it possible the spirals touch each other without allowing the flue gas to flow through prevent. Due to the opposite inclinations of the lines to the tangential direction there are points of contact at which neighboring spirals touch and between them Contact points open areas in which the flue gas can circulate. Automatically a swirling of the flue gas is achieved with a very dense packing of the Wiring harnesses. Due to this opposite direction of rotation and the density of the Packing can usually dispense with a spacing device between the wiring harnesses will. The space required is due to the advantageous arrangement of the wiring harnesses reached.
- Two spirals are advantageously arranged contiguously with one another. Since that Flue gas first flows centrifugally through the spirals, it is advantageous to centriped it again collect for forwarding to the fireplace. It advantageously flows through a second spiral, which is advantageously related to the first spiral.
- This transition between the first and second spirals is advantageously arranged peripherally. This allows multiple such strands, each with two coils, to be assembled can be made by sliding one over the other and making the transition between the Spirals of the second line strand over a spiral of the first line strand runs.
- the wiring harnesses advantageously consist of a single piece and point in the exchange space no connections that offer points of attack for the aggressive flue gas.
- the inlet and outlet for the flue gas are expediently approximately central and one on the housing Passage between the section body and the housing arranged peripherally, so that the flue gas is fed in the middle area and flows centrifugally through the line strands the periphery from a first hotter to a second cooler zone of the exchange room flows where it flows centripedally through the wiring harnesses around out of the central area to be fed into a fireplace.
- the flue gas thus flows along the entire length of the Exchange route against the direction of flow of the medium in the line strings, if this is fed on the cooler side of the exchange room. This will distinguish between the both media achieve the greatest possible temperature gradient.
- the outline body is advantageously a plate that between the two zones in the Exchange room is arranged. It separates the innermost spiral of the hotter zone from the innermost spiral of the cooler zone and forces the flue gas, first between the one spiral of the cable strands to flow to the periphery of the exchange space and then to get back to the center through the other spirals of the cable strands, from where it cools down when it leaves the exchange room.
- the order of the cable runs is freely selectable, but is expedient on both Sides in the same order, as all wiring harnesses have the same shape can.
- the distances between the two spirals of a cable run in a heat exchanger constant. Conveniently the sequence during assembly is selected so that one additional wiring harness is connected directly then placed on the previous one.
- the cable strands are advantageously made of a tube material which has an outside Has plastic surface. This makes the wiring harnesses resistant to the aggressive Flue gases.
- a metal pipe with a plastic jacket has the advantages that it has the necessary Withstandability in the processing process, the dimensional stability even when heated, the Resistant to the aggressive smoke gases and is diffusion-proof thanks to the metal layer for oxygen.
- the metal layer can also be very thin, e.g. a slide. These tubes are additional due to their inner plastic surface better protected from corrosion and deposits inside.
- a commercially available technical three-layer pipe is advantageously used for this, since this is cheaply available thanks to large production quantities. It turned out to be in the development phase of the heat exchanger according to the invention and in tests with prototypes as very suitable. For safety's sake, however, a temperature sensor can preferably be provided, which not only protects against overheating of the plastic of the heat exchanger cable strands, but at the same time the use of a plastic fireplace allows for what deep Flue gas temperatures are recommended.
- the line strands are preferably led out of the housing and outside Collector and distributor connected. So there are no pipe connections inside the exchange room. However, this requires a large number of pipe penetrations through the housing. If you want to avoid this, you can conveniently collect the item and the distribution piece can be arranged within the exchange space, and only the manifolds be guided through the housing wall.
- the aim of heat exchangers is to have an inexpensive, small heat exchanger pack with a large exchange surface with no thermal resistance.
- the thermal resistance of the exchange surfaces can be chosen to be higher than in the case of packs made of more expensive material which take up more space.
- the choice of technical three-layer pipes with the advantages mentioned is therefore expedient in the tight packing according to the invention of the line strings and the price advantage mentioned, even if the pipe walls of such pipes have a higher thermal resistance than metal pipes.
- the thermal resistance of the exchange surface should preferably be less than 0.006 m 2 K / W, particularly preferably less than 0.004 m 2 K / W.
- the bundle of wiring harnesses with an integrated structure by means of spacers create a distance to the housing, fixed in its structure.
- the resulting package can now be inserted into the exchange room.
- the ends come with collectible and Distributor connected.
- the ends of the wiring harnesses can advantageously be outside the Housing to be connected to the collector and distribution piece, and accordingly by the housing must be passed through.
- the ends can also be within the Exchange room to be connected to the collector and distributor, and then accordingly only the header pipes are led through the housing.
- the heat recuperator has a housing 13, 21 with a tubular housing body 21 and two frontal ceiling in 13.
- 21 is the exchange space 47, which is divided into two zones 51 and 53 by a plate-shaped sectional body 49.
- a plurality of wiring harnesses 31 is spirally wound in these two zones 51 and 53 of the Exchange room 47 arranged.
- a liquid medium flows through the lines 31 and exchanges heat with a gaseous medium via the pipe walls Counterflow between the line strands 31 flows through exchange space 47.
- FIG. 1 shows a view of one of the end covers 13 of the recuperator 11.
- the covers 13 are equipped with stabilization punchings 15, a number of openings 17 for Passage of lines are connected to the housing body 21 and have a Central area arranged nozzle 25 for a flue gas pipe to be connected.
- At the Cover 13 is attached to the distributor 33 by means of connecting angles 27 and pipe fastenings 29.
- a cover 13 can also be firmly connected to the housing body 21.
- the only approach drawn wiring harnesses 31 are connected to the distributor 33 and are through the Openings 17 passed through the lid 13.
- the openings 17 are with pipe bushings 35, e.g. made of silicone plastic or rubber-like plastics such as "Viton", so that the necessary tightness is guaranteed and to protect the pipes.
- the housing body 21 is with Supports 37, under which the recuperator can be supported.
- FIG. 2 shows the recuperator 11 in section.
- the covers 13 are visible, each with an inlet 41 or an outlet 42 for the flue gas and the housing body 21 with a closable Cleaning opening 39.
- an outlet 43 for condensate and if necessary, cleaning liquid provided.
- the exchange space 47 is through the plate-shaped Dividing body 49 divided into two zones, the hotter zone 51 on the left and the cooler one on the right Zone 53.
- the wiring harness bundle 55 consists of 12 wiring harnesses 31, each with two spirals (e.g. 61 and 65).
- the first wiring harness 57 begins after the cover 13 is pierced a first inner turn 59.7 turns form a first spiral 61, which with the outermost Turn 63 ends.
- the direction of rotation of the spirals is not visible. Is the first spiral 61 of the first wiring harness 57 viewed from the right cover 13 clockwise from the inside to the outside, so is that first spiral of the 3rd, 5th, 7th, 9th and 11th wiring harness from the inside to the outside clockwise, the other spirals in the cooler zone 53, however, counterclockwise (flow direction according to arrows 46). This creates adjacent spirals between the crossing tubes Gaps through which the flue gas can flow. The way through this Intermediate spaces are twisted and thereby whirl up the flue gas, which is constantly small Make changes to its flow direction. Where necessary, the tube bundle 55 is at the bottom and laterally on spacers (not shown).
- the structure of the wiring harness bundle can be advantageous spacers connected to the bundle can be stabilized. It can also be rod-shaped Deposits can be inserted between the turns of the spirals parallel to the axis that said Stabilize structure as well.
- the exemplary embodiment according to FIG. 3 represents the line bundle 75 of a recuperator 11 ' represents, in which a distributor 78 and a collector 77 in the housing 13, 21 are arranged.
- bundle 75 corresponds exactly to bundle 55.
- the wiring harnesses are in the central area 79 connected to the collector 77 and the distributor 78.
- the connections 85 and 87 these pieces 77 and 78 are passed through the housing. In the present case, they are both Terminals 85 and 87 are provided on the same side of the housing with the manifold 78 through which the exchange space dividing plate 89 is passed. However, it is the same expedient to the connections 85 and 87 on opposite sides of the housing to lead.
- the wire harness bundle 75 can thus be designed symmetrically and the plate 89 must not be pierced.
- the recorded examples have a length of approx. 22.5 meters for each line. This results in a total length of approx. 270 m.
- the surface results in a pipe diameter of 20 mm about 17 m 2 , with a heat exchanger size of about 80 cm in diameter and 55 cm in length. This surface can be enlarged very easily by increasing the number of wiring harnesses and more spiral turns. A further handling would result in an enlargement of the surface by approx. 3.4 m 2 with a diameter increase of only 5 cm in the example given.
- the calculated thermal resistance of the pipe walls of technical three-layer pipes used in the prototypes is in the range between 0.003 and 0.004 m 2 K / W.
Abstract
Description
- Fig.1
- die Ansicht eines Deckels eines Wärmerekuperators mit aussen liegendem Sammelstück und Verteilstück
- Fig.2
- einen Vertikalschnitt durch den Wärmerekuperator mit aussen liegendem Sammelstück und Verteilstück
- Fig.3
- im Schnitt ein Ausführungsbeispiel eines Wärmerekuperators mit innen liegendem Sammelstück und Verteilstück
Claims (20)
- Vorrichtung (11) zur Rückgewinnung von Wärme aus Rauchgas, mit einem einen Austauschraum (47) umhüllenden Gehäuse (21, 13) mit einem Einlass (41) und einem Auslass (42) für ein erstes Medium, mindestens einem diesen Austauschraum (47) gliedernden Gliederungskörper (49) zur Lenkung dieses Mediums, einer Mehrzahl im Austauschraum (47) angeordneter Leitungsstränge (31) zur Durchleitung eines zweiten Mediums, und angeschlossen an die Leitungsstränge (31) mindestens einem Sammelstück (45) und einem Verteilstück (33) zum Zusammenfassen und Aufteilen der Leitungsstränge (31), dadurch gekennzeichnet, dass die Leitungsstränge (31) im Austauschraum (47) spiralförmig vertaufend angeordnet sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Spiralen benachbarter Leitungsstränge (31) entgegengesetzte Drehrichtungen aufweisen.
- Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass ein Leitungsstrang (57) jeweils aus zwei zusammenhängenden Spiralen (61, 65) besteht.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die zwei zusammenhängenden Spiralen (61, 65) eines Leitungsstranges (57) peripher zusammenhängen.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Leitungsstrang (31) jeweils aus einem einzigen, ununterbrochenen Stück besteht.
- Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Einlass (41) und der Auslass (42) im zentralen Bereich am Deckel (13) und ein Durchlass (40) zwischen Gliederungskörper (49) und Gehäuse (21) peripher im Austauschraum (47) angeordnet ist.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Gliederungskörper (49) eine Platte ist, die den Austauschraum (47) in eine heissere Zone (51) und eine kältere Zone (53) teilt.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass jeweils eine der zwei zusammenhängenden Spiralen (61, 65) eines Leitungsstranges (57) in der heisseren Zone (51) und eine in der kälteren Zone (53) des Austauschraumes (47) angeordnet ist.
- Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Reihenfolge der Leitungsstränge (31) in beiden Zonen (51, 53) gleich ist.
- Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Rohrleitungen der Leitungsstränge (31) auf den vom ersten Medium umflossenen Aussenseiten eine Kunststoffoberfläche aufweisen.
- Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die Rohrleitungen Metallrohre mit Kunststoffummantelung sind.
- Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass für die Rohrleitungen Kunststoffrohre mit im Kunststoff eingebetteter Metallfolie sind.
- Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Rohrleitungen eine Metallschicht und aussen und innen eine Kunststoffoberfläche aufweisen.
- Vorrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Leitungsstränge (31) einzeln durch das Gehäuse (21, 13) hindurchgeführt und das Sammelstück (45) und das Verteilstück (33) ausserhalb des Austauschraumes (47) angeordnet sind.
- Vorrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass das Sammelstück (45) und das Verteilstück (33) im Austauschraum (47) angeordnet sind und die Sammelrohre (85, 87) durch das Gehäuse (21, 13) hindurch geführt sind.
- Verfahren zur Herstellung einer Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas gemäss einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass Rohrleitungsstücke mit beiden Enden mit Abstand zueinander in eine Drehmaschine eingespannt und spiralförmig aufgewickelt werden, so dass jeweils zwei an deren Peripherie zusammenhängende gleichdrehende Spiralen einen aus einem Rohrstück gefertigten Leitungsstrang (31) bilden, und diese Leitungsstränge (31) so über einen plattenförmigen Gliederungskörper (49) aufgereiht werden, dass die Spiralen (61, 65) eines Leitungsstranges (57) auf verschiedenen Seiten des Gliederungskörpers (49) zu liegen kommen und deren Zusammenhang um den Gliederungskörper (49) herum besteht, dass dieses Leitungsstrangbündel (55) mit dem plattenförmigen Gliederungskörper (49) zusammen in einen Austauschraum (47) in einem Gehäuse (21, 13) eingebaut wird, so dass der Gliederungskörper (49) den Austauschraum (47) in eine heissere Zone (51) und eine kältere Zone (53) teilt, und dass die Enden der Leitungsstränge (31) an ein Sammelstück (45) und ein Verteilstück (33) angeschlossen werden.
- Verfahren nach Anspruch 16, dadurch gekennzeichnet, dass bei der Aufreihung der Leitungsstränge (31) diese abwechselnd senkrecht zur Spiralachse um 180° gedreht werden und dann so zusammengestellt werden, dass sich benachbarte Spiralen gegenläufig drehen.
- Verfahren nach einem der Ansprüche 16 oder 17, dadurch gekennzeichnet, dass der Abstand zwischen zwei zusammenhängenden Spiralen (61, 65) entsprechend der Anzahl von Leitungssträngen (31) und deren Rohrdurchmesser bemessen wird und eine Mehrzahl von Leitungssträngen (31) den Austauschraum (47) ausfüllend eingebaut wird.
- Verfahren nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, dass die Enden der Leitungsstränge (31) vor dem Anschliessen an das Sammelstück (45) und das Verteilstück (33) durch Öffnungen (17) im Gehäuse (21, 13) hindurch aus dem Gehäuse hinaus geführt werden.
- Verfahren nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, dass die Enden der Leitungsstränge (31) im Austauschraum (47) an das Sammelstück (77) und das Verteilstück (78) angeschlossen werden und daran die angeschlossene Zuleitung (87) und Ableitung (85) aus dem Gehäuse geführt werden.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT97810137T ATE223027T1 (de) | 1997-03-11 | 1997-03-11 | Vorrichtung zur rückgewinnung von wärme aus rauchgas, und verfahren zur herstellung derselben |
DE59708065T DE59708065D1 (de) | 1997-03-11 | 1997-03-11 | Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas, und Verfahren zur Herstellung derselben |
EP97810137A EP0864829B1 (de) | 1997-03-11 | 1997-03-11 | Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas, und Verfahren zur Herstellung derselben |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97810137A EP0864829B1 (de) | 1997-03-11 | 1997-03-11 | Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas, und Verfahren zur Herstellung derselben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0864829A1 true EP0864829A1 (de) | 1998-09-16 |
EP0864829B1 EP0864829B1 (de) | 2002-08-28 |
Family
ID=8230170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810137A Expired - Lifetime EP0864829B1 (de) | 1997-03-11 | 1997-03-11 | Vorrichtung zur Rückgewinnung von Wärme aus Rauchgas, und Verfahren zur Herstellung derselben |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0864829B1 (de) |
AT (1) | ATE223027T1 (de) |
DE (1) | DE59708065D1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2840675A1 (fr) * | 2002-06-06 | 2003-12-12 | Vallet | Dispositif d'echange thermique perfectionne |
WO2009101161A2 (en) | 2008-02-12 | 2009-08-20 | Patrick Gilbert | Heat exchange devices |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB138870A (en) * | 1919-02-08 | 1921-08-08 | Griscom Russell Co | Improvements in or relating to heat interchangers |
CH173859A (de) * | 1933-05-12 | 1934-12-15 | Sulzer Ag | Wärmeaustauscher. |
CH310610A (de) * | 1953-03-16 | 1955-10-31 | Escher Wyss Ag | Wärmeaustauschapparat für durch feste Wände voneinander getrennte Wärmeaustauschmittel. |
US3499484A (en) * | 1966-11-24 | 1970-03-10 | Gianluigi Lanzoni | Two-fluid heat exchanger |
DE1907881A1 (de) * | 1969-02-17 | 1970-09-03 | Becker Dr Ing Kurt | Flache Rohrlagenwicklungen fuer Kreuzstrom-Waermeaustauscher |
FR2602857A1 (fr) * | 1986-08-14 | 1988-02-19 | Nibart Jean Clair | Echangeur de chaleur fumee/eau pour une chaudiere a combustible gazeux ou liquide pour production d'eau chaude, et corps de chauffe comportant un tel echangeur de chaleur |
FR2719370A1 (fr) * | 1994-04-28 | 1995-11-03 | Sofath | Echangeur de chaleur en tube métallique plastifié. |
-
1997
- 1997-03-11 AT AT97810137T patent/ATE223027T1/de active
- 1997-03-11 DE DE59708065T patent/DE59708065D1/de not_active Expired - Lifetime
- 1997-03-11 EP EP97810137A patent/EP0864829B1/de not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB138870A (en) * | 1919-02-08 | 1921-08-08 | Griscom Russell Co | Improvements in or relating to heat interchangers |
CH173859A (de) * | 1933-05-12 | 1934-12-15 | Sulzer Ag | Wärmeaustauscher. |
CH310610A (de) * | 1953-03-16 | 1955-10-31 | Escher Wyss Ag | Wärmeaustauschapparat für durch feste Wände voneinander getrennte Wärmeaustauschmittel. |
US3499484A (en) * | 1966-11-24 | 1970-03-10 | Gianluigi Lanzoni | Two-fluid heat exchanger |
DE1907881A1 (de) * | 1969-02-17 | 1970-09-03 | Becker Dr Ing Kurt | Flache Rohrlagenwicklungen fuer Kreuzstrom-Waermeaustauscher |
FR2602857A1 (fr) * | 1986-08-14 | 1988-02-19 | Nibart Jean Clair | Echangeur de chaleur fumee/eau pour une chaudiere a combustible gazeux ou liquide pour production d'eau chaude, et corps de chauffe comportant un tel echangeur de chaleur |
FR2719370A1 (fr) * | 1994-04-28 | 1995-11-03 | Sofath | Echangeur de chaleur en tube métallique plastifié. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2840675A1 (fr) * | 2002-06-06 | 2003-12-12 | Vallet | Dispositif d'echange thermique perfectionne |
WO2009101161A2 (en) | 2008-02-12 | 2009-08-20 | Patrick Gilbert | Heat exchange devices |
Also Published As
Publication number | Publication date |
---|---|
EP0864829B1 (de) | 2002-08-28 |
ATE223027T1 (de) | 2002-09-15 |
DE59708065D1 (de) | 2002-10-02 |
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