EP1657514A1 - Steam power plant condenser with a water chamber cover - Google Patents
Steam power plant condenser with a water chamber cover Download PDFInfo
- Publication number
- EP1657514A1 EP1657514A1 EP04026860A EP04026860A EP1657514A1 EP 1657514 A1 EP1657514 A1 EP 1657514A1 EP 04026860 A EP04026860 A EP 04026860A EP 04026860 A EP04026860 A EP 04026860A EP 1657514 A1 EP1657514 A1 EP 1657514A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water chamber
- power plant
- chamber cover
- chamber lid
- plant condenser
- 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.)
- Withdrawn
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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
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/067—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- 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
- F28F9/02—Header boxes; End plates
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
- F28F9/0224—Header boxes formed by sealing end plates into covers
Definitions
- the invention relates to a power plant condenser having a water chamber housing and a housing closing the water chamber lid.
- Known water chamber lid of power plant capacitors such as those used in steam power plants, are previously made of steel, such as carbon steel, which is processed in the form of plates or pipes.
- the plates and tubes are machined and not machined, cut, bent, drilled and welded. All of these methods of producing known water chamber lids are comparatively complicated and expensive. However, such expensive production still seems to be necessary because water chamber lids of power plant capacitors are subject to considerable stress during operation of the associated power plant.
- the water chamber lid must have a high resistance to overpressure and underpressure while taking up considerable surface pressures. There are also high requirements in terms of tightness, chemical resistance and breaking strength and deformation under thermal stress.
- the required time-stability over a period of up to 50 years is an essential aspect.
- the invention has for its object to provide a power plant capacitor of the type mentioned, the water chamber lid can be made considerably cheaper.
- the object is achieved according to the invention with a generic power plant condenser, wherein the water chamber lid is made of a plastic material.
- the solution according to the invention is based initially on the insight that water chamber lids of power plant capacitors have only flanged connections, so that it is not absolutely necessary that their material (and in many other components of a power plant) must be weldable. Moreover, according to the invention, with the choice of plastic as the material for a water chamber lid, the prejudice has been overcome that the high requirements for a water chamber lid could be met only with a steel material.
- a plastic lid is used for closing a water chamber housing of a power station condenser which, for example, has a flange connection to an antechamber of the power station condenser (or is flanged directly onto the tube bottom thereof). Furthermore, flange connections to cooling water nozzles or smaller flange connections, for example for emptying or venting can be provided inexpensively to the water chamber lid made of plastic according to the invention. Also, a manhole can be easily and inexpensively designed on the water chamber lid according to the invention and closed with a corresponding additional cover, which may also be made of plastic.
- the water chamber lid according to the invention can be designed such that it is designed during operation of the power plant condenser for a pressure range between about -1 bar and +10 bar, and / or a temperature range between about 0 ° C and 80 ° C. Dimensions of the water chamber lid according to the invention in the order of about 4.5 m x 3.5 m are not uncommon.
- the water chamber lid according to the invention fulfills all requirements with regard to the resistance to overpressure and underpressure, with regard to surface pressure, deformation and breaking strength. This also applies to possible damage during a transport of the water chamber lid.
- the tightness, chemical resistance and time stability of the water chamber lid according to the invention is granted by choosing a corresponding plastic material.
- the water chamber lid according to the invention but can be made much cheaper and faster than known water chamber lid of power plant capacitors. Furthermore, according to the invention, the weight of the water chamber lid is reduced by up to 50% compared to known lids and ensures absolute freedom from corrosion. The corrosion-free is a very significant advantage. The cover according to the invention is thus "maintenance-free". Conventional lids with coatings are subject to mechanical damage and corrosion attacks during operation.
- the power plant capacitor according to the invention if its water chamber lid made of plastic material is further provided with a fiber reinforcement, in particular of glass fiber or carbon fiber.
- a fiber reinforcement in particular of glass fiber or carbon fiber.
- a steam turbine plant 10 is illustrated in which under a turbine rotor 12 a total of three power plant capacitors 14 are arranged.
- the power plant capacitors 14 are each provided with a steam jacket housing, which includes a water chamber housing 16, which is designed substantially parallelepiped and closed at its flange with a water chamber cover 18.
- the water chamber housing 16 are integrated in the condenser or steam jacket housing and are located at the end in a range of about 50 cm.
- the water chamber covers 18 have a size of up to about 4.7 m x 6.5 m and are secured to the water chamber housing 16 by a peripheral flange on their flange by a plurality of screws.
- pipe connections or nozzles are also formed, where flange connections 22 are formed. These flange connections 22 are used for attaching smaller lids or supply and discharge lines.
- FIG. 2 illustrates a power plant condenser 14, which is provided for rearrangement axially behind a turbine (not shown).
- the power plant condenser 14 according to FIG. 2 in turn has a substantially cuboidal water chamber housing 16, which is closed at the opposite cooling water inlet and outlet sides, each with a water chamber cover 18.
- the water chamber cover 18 also each have a circumferential, substantially rectangular-shaped flange 20, with which they are connected to the water chamber housing 16.
- the water chamber cover 18 according to Figure 2 are otherwise similar to those designed in accordance with Figure 1 in the form of a dome roof with simple curved surfaces, in which then flange terminals 22 are formed. In this way, in the water chamber lids 18 according to Figure 2 a total of two relatively large Connections provided for pipelines, in this case a cooling water inlet and outlet.
- the water chamber cover 18 according to FIG. 1 and FIG. 2 can be produced in a particularly cost-effective manner, can be produced in a short time and yet meet all requirements with regard to dimensional accuracy and fatigue strength, they are made of a plastic material which is provided in particular with a fiber reinforcement made of glass fiber.
- the plastic material has been incorporated to produce the water chamber cover 18 in correspondingly shaped impression molds on which also said flanges 20, the flange connections 22 and further details on the water chamber lids, such as screw, transport aids, vent holes and sealing lips have been formed.
- the plastic and fiber material is incorporated into the impression mold in several layers as required.
- the once created impression mold can be used several times for the production of a lid with the same lid design. This leads to a significant cost advantage, especially in a standard design. In this way, the water chamber covers 18 have been manufactured substantially in a single work process.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
Die Erfindung betrifft einen Kraftwerks-Kondensator mit einem Wasserkammergehäuse und einem das Gehäuse verschließenden Wasserkammerdeckel.The invention relates to a power plant condenser having a water chamber housing and a housing closing the water chamber lid.
Bekannte Wasserkammerdeckel von Kraftwerks-Kondensatoren, wie sie beispielsweise bei Dampfkraftwerken zum Einsatz kommen, werden bisher aus Stahl, beispielsweise C-Stahl hergestellt, welcher in Form von Platten oder Rohren verarbeitet wird. Die Platten und Rohre sind dabei spanend und nicht spanend zu bearbeiten, zuzuschneiden, zu biegen, zu bohren und zu verschweißen. All diese Verfahren der Herstellung bekannter Wasserkammerdeckel sind vergleichsweise aufwendig und teuer. Eine solche teure Fertigung scheint aber dennoch notwendig zu sein, denn Wasserkammerdeckel von Kraftwerks-Kondensatoren unterliegen während des Betriebs des zugehörigen Kraftwerks einer erheblichen Beanspruchung. So muss der Wasserkammerdeckel beispielsweise eine hohe Festigkeit gegen Über- und Unterdruck unter Aufnahme erheblicher Flächenpressungen aufweisen. Es bestehen ferner hohe Anforderungen hinsichtlich der Dichtheit, der chemischen Beständigkeit und der Bruchfestigkeit sowie der Verformung unter thermischer Belastung. Schließlich ist auch die erforderliche Zeitbeständigkeit über einen Zeitraum von bis zu 50 Jahren ein wesentlicher Aspekt.Known water chamber lid of power plant capacitors, such as those used in steam power plants, are previously made of steel, such as carbon steel, which is processed in the form of plates or pipes. The plates and tubes are machined and not machined, cut, bent, drilled and welded. All of these methods of producing known water chamber lids are comparatively complicated and expensive. However, such expensive production still seems to be necessary because water chamber lids of power plant capacitors are subject to considerable stress during operation of the associated power plant. For example, the water chamber lid must have a high resistance to overpressure and underpressure while taking up considerable surface pressures. There are also high requirements in terms of tightness, chemical resistance and breaking strength and deformation under thermal stress. Finally, the required time-stability over a period of up to 50 years is an essential aspect.
Der Erfindung liegt die Aufgabe zugrunde, einen Kraftwerks-Kondensator der eingangs genannten Art bereitzustellen, dessen Wasserkammerdeckel erheblich kostengünstiger hergestellt werden kann.The invention has for its object to provide a power plant capacitor of the type mentioned, the water chamber lid can be made considerably cheaper.
Die Aufgabe ist gemäß der Erfindung mit einem gattungsgemäßen Kraftwerks-Kondensator gelöst, bei dem der Wasserkammerdeckel aus einem Kunststoffmaterial hergestellt ist.The object is achieved according to the invention with a generic power plant condenser, wherein the water chamber lid is made of a plastic material.
Dabei beruht die erfindungsgemäße Lösung zunächst auf der Einsicht, dass Wasserkammerdeckel von Kraftwerks-Kondensatoren lediglich geflanschte Anschlüsse aufweisen, sodass es gar nicht zwingend erforderlich ist, dass ihr Material (sowie bei vielen anderen Bauteilen eines Kraftwerks) schweißbar sein muss. Darüber hinaus ist erfindungsgemäß mit der Wahl von Kunststoff als Material für einen Wasserkammerdeckel das Vorurteil überwunden worden, dass allein mit einem Stahlmaterial die hohen Anforderungen an einen Wasserkammerdeckel erfüllt werden könnten.The solution according to the invention is based initially on the insight that water chamber lids of power plant capacitors have only flanged connections, so that it is not absolutely necessary that their material (and in many other components of a power plant) must be weldable. Moreover, according to the invention, with the choice of plastic as the material for a water chamber lid, the prejudice has been overcome that the high requirements for a water chamber lid could be met only with a steel material.
So wird erfindungsgemäß für das Verschließen eines Wasserkammergehäuses eines Kraftwerks-Kondensators ein Deckel aus Kunststoff verwendet, der beispielsweise einen Flanschanschluss zu einer Vorkammer des Kraftwerks-Kondensators aufweist (oder direkt auf dessen Rohrboden geflanscht ist). Ferner können an dem erfindungsgemäßen Wasserkammerdeckel aus Kunststoff auch Flanschanschlüsse zu Kühlwasserstutzen oder kleinere Flanschanschlüsse beispielsweise zur Entleerung bzw. Entlüftung kostengünstig vorgesehen werden. Auch ein Mannloch kann an dem erfindungsgemäßen Wasserkammerdeckel einfach und kostengünstig ausgestaltet und mit einem entsprechenden Zusatzdeckel, der ebenfalls aus Kunststoff hergestellt sein kann, verschlossen werden.Thus, according to the invention, a plastic lid is used for closing a water chamber housing of a power station condenser which, for example, has a flange connection to an antechamber of the power station condenser (or is flanged directly onto the tube bottom thereof). Furthermore, flange connections to cooling water nozzles or smaller flange connections, for example for emptying or venting can be provided inexpensively to the water chamber lid made of plastic according to the invention. Also, a manhole can be easily and inexpensively designed on the water chamber lid according to the invention and closed with a corresponding additional cover, which may also be made of plastic.
Der erfindungsgemäße Wasserkammerdeckel kann dabei derart ausgebildet sein, dass er während des Betriebs des Kraftwerks-Kondensators für einen Druckbereich zwischen zirka -1 bar und +10 bar, und/oder einen Temperaturbereich zwischen zirka 0°C und 80°C ausgelegt ist. Abmessungen des erfindungsgemäßen Wasserkammerdeckels in einer Größenordnung von zirka 4,5 m x 3,5 m sind dabei durchaus keine Seltenheit.The water chamber lid according to the invention can be designed such that it is designed during operation of the power plant condenser for a pressure range between about -1 bar and +10 bar, and / or a temperature range between about 0 ° C and 80 ° C. Dimensions of the water chamber lid according to the invention in the order of about 4.5 m x 3.5 m are not uncommon.
Der erfindungsgemäße Wasserkammerdeckel erfüllt dennoch sämtliche Anforderungen hinsichtlich der Festigkeit gegen Über- und Unterdruck, hinsichtlich Flächenpressung, Verformung und Bruchfestigkeit. Dies gilt auch für eine mögliche Beschädigung bei einem Transport des Wasserkammerdeckels. Auch die Dichtheit, chemische Beständigkeit und Zeitbeständigkeit des erfindungsgemäßen Wasserkammerdeckels ist durch Wahl eines entsprechenden Kunststoffmaterials gewährt.Nevertheless, the water chamber lid according to the invention fulfills all requirements with regard to the resistance to overpressure and underpressure, with regard to surface pressure, deformation and breaking strength. This also applies to possible damage during a transport of the water chamber lid. The tightness, chemical resistance and time stability of the water chamber lid according to the invention is granted by choosing a corresponding plastic material.
Darüber hinaus kann der erfindungsgemäße Wasserkammerdeckel aber erheblich kostengünstiger und auch schneller hergestellt werden, als bekannte Wasserkammerdeckel von Kraftwerks-Kondensatoren. Ferner wird erfindungsgemäß das Gewicht des Wasserkammerdeckels gegenüber bekannten Deckeln um bis zu 50% verringert und eine absolute Korrosionsfreiheit gewährleist. Die Korrosionsfreiheit ist ein ganz wesentlicher Vorteil. Der erfindungsgemäße Deckel ist dadurch "wartungsfrei". Herkömmliche Deckel mit Beschichtungen unterliegen im Betrieb der mechanischen Beschädigung und Korrosionsangriffen.In addition, the water chamber lid according to the invention but can be made much cheaper and faster than known water chamber lid of power plant capacitors. Furthermore, according to the invention, the weight of the water chamber lid is reduced by up to 50% compared to known lids and ensures absolute freedom from corrosion. The corrosion-free is a very significant advantage. The cover according to the invention is thus "maintenance-free". Conventional lids with coatings are subject to mechanical damage and corrosion attacks during operation.
Schließlich ist es für den erfindungsgemäßen Kraftwerks-Kondensator besonders vorteilhaft, wenn dessen Wasserkammerdeckel aus Kunststoffmaterial ferner mit einer Faserverstärkung, insbesondere aus Glasfaser oder Kohlefaser, versehen ist. Eine derartige Einbettung hochfester Fasern in das erfindungsgemäß gewählte Kunststoffmaterial für einen Wasserkammerdeckel erhöht insbesondere dessen Festigkeit gegen Über- und Unterdruck und stellt sicher, dass dieser sämtlichen Anforderungen auch bei höchsten Belastungen gerecht wird.Finally, it is particularly advantageous for the power plant capacitor according to the invention if its water chamber lid made of plastic material is further provided with a fiber reinforcement, in particular of glass fiber or carbon fiber. Such an embedding of high-strength fibers in the plastic material chosen according to the invention for a water chamber lid in particular increases its resistance to overpressure and underpressure and ensures that it meets all the requirements, even under the highest loads.
Nachfolgend werden Ausführungsbeispiele erfindungsgemäßer Kraftwerks-Kondensatoren anhand der beigefügten schematischen Zeichnungen näher erläutert.Embodiments of power plant capacitors according to the invention will be explained in more detail below with reference to the attached schematic drawings.
Es zeigt:
- Fig. 1
- eine perspektivische Ansicht einer Dampfturbinenanlage eines Kraftwerks mit einem ersten Ausführungsbeispiel eines erfindungsgemäßen Wasserkammerdeckels und
- Fig. 2
- eine perspektivische Ansicht eines Kraftwerks-Kondensators mit einem zweiten Ausführungsbeispiel eines erfindungsgemäßen Wasserkammerdeckels.
- Fig. 1
- a perspective view of a steam turbine plant of a power plant with a first embodiment of a water chamber lid according to the invention and
- Fig. 2
- a perspective view of a power plant capacitor with a second embodiment of a water chamber lid according to the invention.
In Fig. 1 ist eine Dampfturbinenanlage 10 veranschaulicht bei der unter einem Turbinenrotor 12 insgesamt drei Kraftwerks-Kondensatoren 14 angeordnet sind. Die Kraftwerks-Kondensatoren 14 sind jeweils mit einem Dampfmantelgehäuse versehen, welches ein Wasserkammergehäuse 16 beinhaltet, das im Wesentlichen quaderförmig gestaltet und an seiner Flanschfläche mit einem Wasserkammerdeckel 18 verschlossen ist. Die Wasserkammergehäuse 16 sind in dem Kondensator- bzw. Dampfmantelgehäuse integriert und befinden sich an dessen Ende in einem Bereich von ca. 50 cm. Die Wasserkammerdeckel 18 weisen eine Größe von bis zu zirka 4,7 m x 6,5 m auf und sind durch einen an ihrem Rand umlaufenden Flansch durch eine Vielzahl von Schrauben an dem Wasserkammergehäuse 16 befestigt. Am Wasserkammerdeckel 18 sind ferner Rohranschlüsse oder Stutzen ausgebildet, an denen Flanschanschlüsse 22 ausgebildet sind. Diese Flanschanschlüsse 22 dienen zum Anbringen von kleineren Deckeln oder von Zu- und Abführleitungen.In Fig. 1, a
In Figur 2 ist ein Kraftwerks-Kondensator 14 veranschaulicht, welcher zum Anordnen axial hinter einer (nicht dargestellten Turbine) vorgesehen ist. Der Kraftwerks-Kondensator 14 gemäß Figur 2 weist wiederum ein im Wesentlichen quaderförmiges Wasserkammergehäuse 16 auf, welches an den gegenüberliegenden Kühlwasserein- und -austrittsseiten mit jeweils einem Wasserkammerdeckel 18 verschlossen ist. Die Wasserkammerdeckel 18 weisen dabei ebenfalls jeweils einen umlaufenden, im Wesentlichen rechteckig gestalteten Flansch 20 auf, mit dem sie an das Wasserkammergehäuse 16 angeschlossen sind. Die Wasserkammerdeckel 18 gemäß Figur 2 sind im Übrigen ähnlich wie jene gemäß Figur 1 in Form eines Kuppeldaches mit einfach gewölbten Flächen gestaltet, in denen dann Flanschanschlüsse 22 ausgeformt sind. In dieser Weise sind bei den Wasserkammerdeckeln 18 gemäß Figur 2 insgesamt zwei vergleichsweise große Anschlüsse für Rohrleitungen vorgesehen, vorliegend ein Kühlwasserein- und -austritt.FIG. 2 illustrates a
Damit die Wasserkammerdeckel 18 gemäß Figur 1 und Figur 2 besonders kostengünstig hergestellt, in einer kurzen Zeit produziert werden können und dennoch sämtlichen Anforderungen hinsichtlich Maßgenauigkeit und Dauerfestigkeit entsprechen, sind sie aus einem Kunststoffmaterial hergestellt, welches insbesondere mit einer Faserverstärkung aus Glasfaser versehen ist. Das Kunststoffmaterial ist zur Herstellung der Wasserkammerdeckel 18 in entsprechend gestaltete Abdruckformen eingearbeitet worden, an denen auch die genannten Flansche 20, die Flanschanschlüsse 22 und ferner weitere Details an den Wasserkammerdeckeln, wie beispielsweise Schraubanschlüsse, Transporthilfen, Entlüftungsbohrungen und Dichtlippen ausgebildet worden sind. Das Kunststoff- und Fasermaterial wird je nach Anforderung in mehreren Schichten in die Abdruckform eingearbeitet. Die einmalig erzeugte Abdruckform kann bei gleichem Deckeldesign mehrfach zur Herstellung eines Deckels benutzt werden. Dies führt zu einem erheblichen Kostenvorteil insbesondere bei einem Standard-Design. Auf diese Art und Weise sind die Wasserkammerdeckel 18 im Wesentlichen in nur einem einzigen Arbeitsprozess hergestellt worden.So that the water chamber cover 18 according to FIG. 1 and FIG. 2 can be produced in a particularly cost-effective manner, can be produced in a short time and yet meet all requirements with regard to dimensional accuracy and fatigue strength, they are made of a plastic material which is provided in particular with a fiber reinforcement made of glass fiber. The plastic material has been incorporated to produce the
Im Gegensatz zu bekannten Wasserkammerdeckeln, welche aus Stahl gefertigt sind, ist auf diese Art und Weise erfindungsgemäß der (im Stahlbau hohe) Fertigungsaufwand erheblich reduziert und damit auch die Gesamtfertigungszeit verringert worden. Weil die erfindungsgemäß aus Kunststoffmaterial hergestellten Wasserkammerdeckel 18 ferner absolut korrosionsfrei und auch vergleichsweise leicht sind, ergeben sich weitere Vorteile durch Entfall von zusätzlichen, z. T. aufwändigen Korrosionsschutzschichten und durch eine vereinfachte Handhabung der Wasserkammerdeckel 18 während eines Transports, einer Montage und einer Reparatur des zugehörigen Kraftwerks-Kondensators 14.In contrast to known water chamber lids, which are made of steel, according to the invention, the production costs (which are high in steel construction) are considerably reduced in this way, and thus also the overall production time has been reduced. Because the invention made of plastic material
Claims (2)
dadurch gekennzeichnet, dass
der Wasserkammerdeckel (18) aus einem Kunststoffmaterial hergestellt ist.Power plant condenser (14) having a water chamber housing (16) and a water chamber lid (18) closing the housing,
characterized in that
the water chamber lid (18) is made of a plastic material.
dadurch gekennzeichnet, dass
der Wasserkammerdeckel (18) mit einer Faserverstärkung, insbesondere aus Glasfaser oder Kohlefaser, versehen ist.Power plant condenser according to claim 1,
characterized in that
the water chamber lid (18) is provided with a fiber reinforcement, in particular of glass fiber or carbon fiber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04026860A EP1657514A1 (en) | 2004-11-11 | 2004-11-11 | Steam power plant condenser with a water chamber cover |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04026860A EP1657514A1 (en) | 2004-11-11 | 2004-11-11 | Steam power plant condenser with a water chamber cover |
Publications (1)
Publication Number | Publication Date |
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EP1657514A1 true EP1657514A1 (en) | 2006-05-17 |
Family
ID=34927349
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EP04026860A Withdrawn EP1657514A1 (en) | 2004-11-11 | 2004-11-11 | Steam power plant condenser with a water chamber cover |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB862094A (en) * | 1958-04-26 | 1961-03-01 | Mendip Chemical Engineering Lt | Improvements in or relating to the construction of water boxes for heat exchangers |
US3280904A (en) * | 1963-05-08 | 1966-10-25 | Whitmoyer Lab Inc | Heat exchange vessel |
-
2004
- 2004-11-11 EP EP04026860A patent/EP1657514A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB862094A (en) * | 1958-04-26 | 1961-03-01 | Mendip Chemical Engineering Lt | Improvements in or relating to the construction of water boxes for heat exchangers |
US3280904A (en) * | 1963-05-08 | 1966-10-25 | Whitmoyer Lab Inc | Heat exchange vessel |
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