ES2594361B1 - HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE - Google Patents
HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE Download PDFInfo
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- ES2594361B1 ES2594361B1 ES201530833A ES201530833A ES2594361B1 ES 2594361 B1 ES2594361 B1 ES 2594361B1 ES 201530833 A ES201530833 A ES 201530833A ES 201530833 A ES201530833 A ES 201530833A ES 2594361 B1 ES2594361 B1 ES 2594361B1
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- tubes
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- heat exchanger
- gases
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- 239000007789 gas Substances 0.000 title claims abstract description 65
- 239000012809 cooling fluid Substances 0.000 claims abstract description 8
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
-
- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Intercambiador de calor para gases, en especial de los gases de escape de un motor.#Comprende un haz de tubos (2) o placas dispuestos en el interior de una carcasa (3), definiendo dicha carcasa una entrada y salida de fluido refrigerante, estando dichos gases de escape destinados a circular por el interior de dichos tubos (2) o entre dichas placas, incluyendo el interior de cada uno de dichos tubos (2) o placas unos medios (8) perturbadores del flujo de gases para facilitar el intercambio de calor con un fluido refrigerante, caracterizado por el hecho de que dichos medios perturbadores comprenden al menos dos conjuntos (8a, 8b, 8c, 3d) de elementos (8) perturbadores dispuestos uno sobre otro en el interior de cada uno de dichos tubos (2) o entre dichas placas, definiendo cada uno de dichos conjuntos (8a, 8b, 8c, 8d) de elementos (8) perturbadores un subconjunto independiente de trayectorias (11a, 11b, 12a, 12b) de paso del flujo de gases.Heat exchanger for gases, especially the exhaust gases of an engine. # Includes a bundle of tubes (2) or plates arranged inside a housing (3), said housing defining an inlet and outlet of cooling fluid, said exhaust gases intended to circulate inside said tubes (2) or between said plates, including inside each of said tubes (2) or plates disrupting means (8) of the gas flow to facilitate exchange of heat with a cooling fluid, characterized in that said disturbing means comprise at least two sets (8a, 8b, 8c, 3d) of disturbing elements (8) disposed one above the other inside each of said tubes ( 2) or between said plates, each of said sets (8a, 8b, 8c, 8d) of disturbing elements (8) defining an independent subset of trajectories (11a, 11b, 12a, 12b) of gas flow passage.
Description
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DESCRIPCIONDESCRIPTION
INTERCAMBIADOR DE CALOR PARA GASES, EN ESPECIAL DE LOS GASES DEHEAT EXCHANGER FOR GASES, ESPECIALLY OF GASES
ESCAPE DE UN MOTORESCAPE OF AN ENGINE
La presente invencion se refiere a un intercambiador de calor para gases, en especial de los gases de escape de un motor. La invencion se aplica especialmente en intercambiadores de recirculacion de gases de escape de un motor (EGRC).The present invention relates to a heat exchanger for gases, especially the exhaust gases of an engine. The invention is especially applied in exhaust recirculation exchangers of an engine (EGRC).
Antecedentes de la invencionBackground of the invention
La funcion principal de los intercambiadores EGR es el intercambio de calor entre los gases de escape y el fluido refrigerante, con el fin de enfriar los gases.The main function of the EGR exchangers is the exchange of heat between the exhaust gases and the cooling fluid, in order to cool the gases.
Actualmente, los intercambiadores de calor EGR son ampliamente usados para aplicaciones Diesel con el fin de reducir las emisiones, y tambien son usados en aplicaciones de gasolina para reducir el consumo de combustible.Currently, EGR heat exchangers are widely used for diesel applications to reduce emissions, and are also used in gasoline applications to reduce fuel consumption.
El mercado tiende a reducir el tamano de los motores, y a la aplicacion de los intercambiadores de calor EGR no solo en aplicaciones de alta presion (HP) sino tambien en los de baja presion (LP). Los fabricantes de vehlculos demandan intercambiadores de calor EGR con mayores ren- dimientos y, a la vez, el espacio disponible para colocar el intercambiador y sus componentes es cada vez mas pequeno y mas diflcil de integrar.The market tends to reduce the size of the engines, and the application of EGR heat exchangers not only in high pressure (HP) applications but also in low pressure (LP) applications. Vehicle manufacturers demand EGR heat exchangers with higher yields and, at the same time, the space available to place the exchanger and its components is becoming smaller and more difficult to integrate.
Adicionalmente, en muchas aplicaciones el flujo de fluido refrigerante disponible para enfriar los gases de escape tiende a ser menor aunque los rendimientos del intercambiador hayan ido incrementando.Additionally, in many applications the flow of refrigerant fluid available to cool the exhaust gases tends to be lower even though the exchanger yields have been increasing.
La configuration actual de los intercambiadores EGR en el mercado se corresponde con un intercambiador de calor metalico fabricado generalmente de acero inoxidable o aluminio. Basi- camente, hay dos tipos de intercambiadores de calor EGR: un primer tipo consiste en una car- casa en cuyo interior se dispone un haz de tubos paralelos para el paso de los gases, circulando el refrigerante por la carcasa, exteriormente a los tubos, y el segundo tipo consta de una serie de placas paralelas que constituyen las superficies de intercambio de calor, de manera que los gases de escape y el refrigerante circulan entre dos placas, en capas alternadas, pudiendo incluir aletas para el mejorar el intercambio de calor.The current configuration of the EGR exchangers in the market corresponds to a metal heat exchanger generally made of stainless steel or aluminum. Basically, there are two types of EGR heat exchangers: a first type consists of a housing in whose interior there is a parallel tube beam for the passage of gases, the refrigerant circulating through the housing, externally to the tubes , and the second type consists of a series of parallel plates that constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate between two plates, in alternating layers, and may include fins to improve heat exchange .
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En el caso de intercambiadores de calor de haz de tubos, la union entre los tubos y la carcasa puede ser de diferentes tipos. Generalmente, los tubos estan fijados por sus extremos entre dos placas de soporte acopladas en cada extremo de la carcasa, presentando ambas placas de soporte una pluralidad de orificios para la colocation de los respectivos tubos.In the case of tube beam heat exchangers, the union between the tubes and the housing can be of different types. Generally, the tubes are fixed at their ends between two support plates coupled at each end of the housing, both support plates having a plurality of holes for the placement of the respective tubes.
Dichas placas de soporte estan fijadas a su vez a unos medios de conexion con la llnea de recirculation, que pueden consistir en una conexion en V o bien en un reborde periferico de conexion o brida, dependiendo del diseno de la llnea de recirculacion donde esta ensamblado el intercambiador. Dicha brida puede estar ensamblada junto con un deposito de gas, de manera que el deposito de gas es una pieza intermedia entre la carcasa y la brida, o bien la brida puede estar ensamblada directamente a la carcasa. Este ultimo diseno corresponde frecuentemente a los casos donde el intercambiador esta unido directamente a una valvula EGR, que tiene la funcion de controlar el paso de gases de escape a traves del mismo.Said support plates are in turn fixed to means of connection with the recirculation line, which may consist of a V connection or a peripheral connection flange or flange, depending on the design of the recirculation line where it is assembled. the exchanger Said flange can be assembled together with a gas tank, so that the gas tank is an intermediate piece between the housing and the flange, or the flange can be assembled directly to the housing. This last design frequently corresponds to cases where the exchanger is directly connected to an EGR valve, which has the function of controlling the passage of exhaust gases through it.
En algunas aplicaciones de circuitos EGR, es necesario enfriar la valvula EGR. En este caso, el diseno mas usual incluye un conducto by-pass que conduce el fluido de refrigeration, que circula a traves del intercambiador EGR, hacia la valvula EGR. Debido a que el intercambiador EGR esta ensamblado al circuito EGR a traves de una brida o reborde periferico, el conducto by-pass del fluido de refrigeracion debe ser fabricado a traves de dicha brida.In some applications of EGR circuits, it is necessary to cool the EGR valve. In this case, the most usual design includes a by-pass conduit that conducts the refrigeration fluid, which circulates through the EGR exchanger, to the EGR valve. Because the EGR exchanger is assembled to the EGR circuit through a flange or peripheral flange, the bypass pass of the cooling fluid must be manufactured through said flange.
En ambos tipos de intercambiadores EGR, la mayor parte de sus componentes son metalicos, de modo que estan ensamblados por medios mecanicos y despues soldados en horno o soldados por arco o laser para asegurar una adecuada estanqueidad requerida para esta aplicacion.In both types of EGR exchangers, most of its components are metallic, so that they are assembled by mechanical means and then welded in an oven or welded by arc or laser to ensure adequate sealing required for this application.
Son conocidos intercambiadores EGR de tubos de section transversal sensiblemente rectangular, que utilizan unas aletas dispuestas en el interior de dichos tubos para mejorar la transferencia de calor mediante estas superficies secundarias, por lo que se consigue incrementar la superficie total de intercambio de calor.EGR exchangers of tubes of substantially rectangular cross-section are known, which use fins arranged inside said tubes to improve heat transfer by means of these secondary surfaces, whereby the total heat exchange surface is increased.
Existen diferentes tipos de aletas para tubos, como por ejemplo la aleta conocida como "offset fin” que presenta una configuration de perfil sensiblemente rectangular repetitivo en la direction transversal, y con trayectorias en zig-zag intercomunicadas segun la direction longitudinal, o por ejemplo la aleta conocida como "wavy fin” con canales que definen trayectorias onduladas o sinusoidales.There are different types of fins for tubes, such as the fin known as "offset offset" that has a repetitively rectangular profile configuration in the transverse direction, and interconnected zigzag paths according to the longitudinal direction, or for example the fin known as "wavy end" with channels that define wavy or sinusoidal paths.
Un objetivo principal de los intercambiadores de calor EGR es conseguir una distribution del flujo de gases apropiada dentro de los canales de paso de los gases, en este caso dentro de los tubos o placas, de modo que se garantice un flujo de calor uniforme en todo el intercambiador y se aproveche toda el area de intercambio disponible. Por tanto, es importante la forma del 5 deposito de gas u otros elementos que pueden ser ensamblados al intercambiador de calor EGR en la trayectoria de paso de los gases, especialmente en la zona de entrada. El diseno de estos componentes es esencial dentro del diseno total del intercambiador. No obstante, existen limitaciones externas que hacen diflcil la optimization de este diseno, ya que la forma y el volumen de estos componentes estan determinados por el entorno donde esta ubicado el 10 intercambiador EGR.A main objective of the EGR heat exchangers is to achieve an appropriate gas flow distribution within the gas passage channels, in this case within the tubes or plates, so that a uniform heat flow is guaranteed throughout the exchanger and take advantage of all the available exchange area. Therefore, the shape of the gas tank or other elements that can be assembled to the EGR heat exchanger in the path of the gases, especially in the entrance area, is important. The design of these components is essential within the total design of the exchanger. However, there are external limitations that make optimization of this design difficult, since the shape and volume of these components are determined by the environment where the EGR exchanger is located.
La compactacion del diseno de las aletas en el interior de los tubos o placas permitirla obtener intercambiadores de menor longitud y, en consecuencia, permitirla ganar un espacio que redundarla positivamente en la optimizacion del diseno de elementos de ensamble como el deposito de gas. Sin embargo, los procesos de fabrication de los perturbadores tienen una 15 limitation en factibilidad ligada a la combination de densidad de superficie de intercambio y altura de la aleta.The compaction of the design of the fins inside the tubes or plates would allow it to obtain exchangers of shorter length and, consequently, allow it to gain a space that would positively result in the optimization of the design of assembly elements such as the gas tank. However, the fabrication processes of the disturbers have a 15 limitation in feasibility linked to the combination of exchange surface density and fin height.
Description de la inventionDescription of the invention
El objetivo del intercambiador de calor para gases, en especial de los gases de escape de un motor de la presente invencion es solventar los inconvenientes que presentan los 20 intercambiadores conocidos en la tecnica, proporcionando un intercambiador compacto y de reducida longitud con una optima transferencia de calor en la entrada del flujo de gases.The objective of the gas heat exchanger, especially of the exhaust gases of an engine of the present invention is to solve the inconveniences of the 20 exchangers known in the art, providing a compact and reduced length exchanger with an optimal transfer of heat at the gas flow inlet.
El intercambiador de calor para gases, en especial de los gases de escape de un motor, objeto de la presente invencion, es del tipo que comprende un haz de tubos o placas dispuestos en el interior de una carcasa, definiendo dicha carcasa una entrada y salida de fluido refrigerante 25 estando dichos gases destinados a circular por el interior de dichos tubos o entre dichas placas, incluyendo el interior de cada uno de dichos tubos o placas unos medios perturbadores del flujo de gases para facilitar el intercambio de calor con el fluido refrigerante, y se caracteriza por el hecho de que los medios perturbadores incluyen al menos dos conjuntos de elementos perturbadores dispuestos uno sobre otro en el interior de cada uno de dichos tubos 30 o entre dichas placas, definiendo cada uno de dichos conjuntos un subconjunto independiente de trayectorias de paso del flujo de gas en el interior de dichos tubos o placas.The heat exchanger for gases, especially the exhaust gases of an engine, object of the present invention, is of the type comprising a bundle of tubes or plates arranged inside a housing, said housing defining an inlet and outlet of refrigerant fluid 25 said gases being intended to circulate inside said tubes or between said plates, including inside each of said tubes or plates disturbing means of the gas flow to facilitate heat exchange with the cooling fluid, and is characterized by the fact that the disturbing means includes at least two sets of disturbing elements arranged one above the other inside each of said tubes 30 or between said plates, each of said assemblies defining an independent subset of trajectories of passage of the gas flow inside said tubes or plates.
La inclusion de dos conjuntos de elementos perturbadores dispuestos uno sobre otro en el interior de los tubos o entre dichas placas permite mejorar la compacidad de la superficie deThe inclusion of two sets of disturbing elements arranged one above the other inside the tubes or between said plates allows to improve the compactness of the surface of
intercambio y reducir la longitud del intercambiador, ganando espacio para el diseno optimoexchange and reduce the length of the exchanger, gaining space for optimal design
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de los elementos de ensamble, como por ejemplo, el deposito de gas o las bridas de conexion, mejorando la eficacia de los intercambiadores existentes.of the assembly elements, such as the gas tank or connection flanges, improving the efficiency of existing exchangers.
Segun una realization preferida, cada conjunto de elementos perturbadores comprende una pluralidad de aletas para el intercambio de calor, definiendo la pluralidad de aletas de cada conjunto un subconjunto independiente de trayectorias para el paso del flujo de gases en el interior de dichos tubos o entre dichas placas. Ventajosamente, estas aletas se obtienen a partir de una lamina de metal.According to a preferred embodiment, each set of disturbing elements comprises a plurality of fins for heat exchange, the plurality of fins of each set defining a separate subset of paths for the passage of the flow of gases into said tubes or between said plates. Advantageously, these fins are obtained from a sheet of metal.
De acuerdo con esta realizacion, la altura interior de los tubos o placas del intercambiador se disena de modo que es posible introducir en su interior al menos dos conjuntos de aletas dispuestos apilados uno sobre otro. Cada uno de estos conjuntos define un subconjunto independiente de trayectorias para el paso del flujo de gases.According to this embodiment, the interior height of the tubes or plates of the exchanger is designed so that it is possible to introduce at least two sets of fins arranged stacked on top of each other. Each of these sets defines an independent subset of trajectories for the passage of gas flow.
Ventajosamente, las aletas de ambos conjuntos presentan una configuration de perfil sensiblemente rectangular repetitivo en la direction transversal.Advantageously, the fins of both sets have a substantially rectangular profile configuration in the transverse direction.
Segun una realizacion, las aletas de ambos conjuntos presentan una configuracion tipo "offset fin” que define trayectorias en zig-zag para el paso del flujo de gases segun la direccion longitudinal, estando intercomunicadas dichas trayectorias segun dicha misma direccion longitudinal.According to one embodiment, the fins of both sets have an "offset end" type configuration that defines zigzag paths for the passage of the gas flow according to the longitudinal direction, said paths being intercommunicated according to said same longitudinal direction.
La utilization de dos conjuntos independientes de aletas intercomunicadas permite obtener un intercambiador muy compacto y de reducida longitud.The utilization of two independent sets of intercommunicated fins allows to obtain a very compact and short length exchanger.
Segun otra realizacion, las aletas de ambos conjuntos presentan una configuracion tipo "wavy fin” que define trayectorias sinusoidales segun la direccion longitudinal para el paso del flujo de gases.According to another embodiment, the fins of both sets have a "wavy end" type configuration that defines sinusoidal paths according to the longitudinal direction for the passage of the gas flow.
La utilizacion de dos conjuntos independientes de aletas sinusoidales permite obtener un intercambiador compacto particularmente util para evitar la perdida de presion de los gases.The use of two independent sets of sinusoidal fins makes it possible to obtain a particularly useful compact exchanger to avoid loss of gas pressure.
Preferiblemente, los dos conjuntos de elementos perturbadores estan unidos uno sobre otro mediante soldadura o mediante medios mecanicos, al objeto de asegurar una correcta transferencia de calor.Preferably, the two sets of disturbing elements are connected to each other by welding or by mechanical means, in order to ensure proper heat transfer.
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Opcionalmente, dichos conjuntos de elementos perturbadores estan dispuestos uno sobre el otro de modo que un extremo de uno de los conjuntos queda situado segun la direction longitudinal en una position avanzada o retrasada respecto a la position del extremo del otro conjunto situado en una posicion inferior.Optionally, said sets of disturbing elements are arranged one above the other so that one end of one of the sets is located according to the longitudinal direction in an advanced or delayed position with respect to the position of the end of the other set located in a lower position.
Breve description de las figurasBrief description of the figures
Para mejor comprension de cuanto se ha expuesto se acompanan unos dibujos en los que, esquematicamente y tan solo a tltulo de ejemplo no limitativo, se representan dos casos practicos de realization de un intercambiador de calor de la presente invention, en los que:For a better understanding of how much has been exposed, some drawings are attached in which, schematically and only by way of non-limiting example, two practical cases of realization of a heat exchanger of the present invention are represented, in which:
La figura 1 es una vista en perspectiva que muestra la carcasa exterior de un intercambiador de calor de tubos paralelos y algunos de sus elementos de ensamble o conexion.Figure 1 is a perspective view showing the outer shell of a parallel tube heat exchanger and some of its assembly or connection elements.
La figura 2 es una vista en perspectiva de dos conjuntos independientes de elementos perturbadores configurados a modo de aletas de tipo "offset fin”.Figure 2 is a perspective view of two independent sets of disturbing elements configured as fin "offset" fins.
La figura 3 es una section transversal de un tubo de paso de gases del intercambiador de calor de la figura 1 con los conjuntos de elementos perturbadores de la figura 2.Figure 3 is a cross section of a gas passage tube of the heat exchanger of Figure 1 with the sets of disturbing elements of Figure 2.
La figura 4 es una seccion longitudinal de un tubo de paso de gases del intercambiador de calor de la figura 1 que contiene en su interior los conjuntos de elementos perturbadores de la figura 2.Figure 4 is a longitudinal section of a gas passage tube of the heat exchanger of Figure 1 containing inside the assemblies of disturbing elements of Figure 2.
La figura 5 es una vista en perspectiva de dos conjuntos de elementos perturbadores configurados a modo de aletas de tipo "wavy fin”.Figure 5 is a perspective view of two sets of disturbing elements configured as fins of the "wavy fin" type.
La figura 6 es una seccion transversal de un tubo de paso de gases de un intercambiador de calor similar al de la figura 1 que contiene en su interior los conjuntos de elementos perturbadores de la figura 5.Figure 6 is a cross-section of a gas passage tube of a heat exchanger similar to that of Figure 1 containing inside the assemblies of disturbing elements of Figure 5.
La figura 7 es una seccion longitudinal de un tubo de paso de gases de un intercambiador que contiene en su interior los conjuntos de elementos perturbadores de la figura 5.Figure 7 is a longitudinal section of a gas passage tube of an exchanger containing inside it the assemblies of disturbing elements of Figure 5.
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Descripcion de realizaciones preferidasDescription of preferred embodiments
De acuerdo con las realizaciones de la invention mostradas en las figuras 1 a 7, el intercambiador de calor 1 para gases, en especial de los gases de escape de un motor, comprende un haz de tubos 2 dispuestos en el interior de una carcasa 3 definiendo dichos tubos 2 una entrada y salida de gases. Estos tubos 2 estan destinados a la circulation de los gases para el intercambio de calor con un fluido refrigerante. En uno de los extremos del intercambiador se situa un deposito de gas 6 y una brida 7 de conexion con la llnea de recirculacion de gases.According to the embodiments of the invention shown in Figures 1 to 7, the heat exchanger 1 for gases, especially the exhaust gases of an engine, comprises a bundle of tubes 2 arranged inside a housing 3 defining said tubes 2 a gas inlet and outlet. These tubes 2 are intended for the circulation of gases for the exchange of heat with a cooling fluid. At one end of the exchanger there is a gas tank 6 and a connection flange 7 with the gas recirculation line.
Las figuras 2 a 4 corresponden a una primera realization del intercambiador 1 que incluye dos conjuntos 8a, 8b de elementos perturbadores configurados a modo de aletas 8 dispuestos apilados uno sobre otro en el interior de los tubos 2 de paso de gases. En esta primera realizacion, la section de cada tubo 2 es sensiblemente rectangular y las aletas 8 se obtienen a partir de una lamina de metal formando una configuration de elementos perturbadores de perfil sensiblemente rectangular que define unas trayectorias 10a, 10b en zig-zag intercomunicadas segun la direction longitudinal para el paso del flujo de gas.Figures 2 to 4 correspond to a first embodiment of the exchanger 1 which includes two sets 8a, 8b of disturbing elements configured as fins 8 arranged stacked one above the other inside the gas passage tubes 2. In this first embodiment, the section of each tube 2 is substantially rectangular and the fins 8 are obtained from a sheet of metal forming a configuration of disturbing elements of substantially rectangular profile defining interconnected zigzag paths 10a, 10b according to the longitudinal direction for the passage of the gas flow.
Tal y como puede verse en las figuras 2 y 3, los dos conjuntos 8a, 8b de elementos perturbadores, en este caso aletas 8, estan dispuestos unidos y apilados uno sobre otro de modo que definen dos subconjuntos independientes 10a, 10b de trayectorias para el paso del flujo de gases. La union de los dos conjuntos de aletas 8 puede llevarse a cabo mediante soldadura o mediante medios mecanicos.As can be seen in Figures 2 and 3, the two sets 8a, 8b of disturbing elements, in this case fins 8, are arranged joined and stacked on top of each other so that they define two independent subsets 10a, 10b of paths for the Gas flow step. The union of the two sets of fins 8 can be carried out by welding or by mechanical means.
Las figuras 5 a 7 corresponden a una segunda realizacion del intercambiador 1 que incluye tambien dos conjuntos 8c, 8d de elementos perturbadores configurados a modo de aletas 8 dispuestos apilados uno sobre otro en el interior de un tubo 2 que, en este caso, define dos camaras interiores 2a, 2b para el paso de flujo de gas.Figures 5 to 7 correspond to a second embodiment of the exchanger 1 which also includes two sets 8c, 8d of disturbing elements configured as fins 8 arranged stacked one on top of the other inside a tube 2 which, in this case, defines two inner chambers 2a, 2b for the passage of gas flow.
En esta segunda realizacion de las figuras 5 a 7, las aletas 8 de ambos conjuntos 8c, 8d presentan una configuracion que define trayectorias 11a, 11b sinusoidales segun la direccion longitudinal para el paso del flujo de gas (ver figura 5). Al igual que en la realizacion anterior, los dos conjuntos 8c, 8d de elementos perturbadores estan apilados uno sobre otro de modo que definen dos subconjuntos independientes 11a,11b de trayectorias para el paso del flujo de gases en el interior de cada tubo 2 del intercambiador.In this second embodiment of Figures 5 to 7, the fins 8 of both sets 8c, 8d have a configuration that defines sinusoidal paths 11a, 11b according to the longitudinal direction for the passage of the gas flow (see Figure 5). As in the previous embodiment, the two sets 8c, 8d of disturbing elements are stacked on top of each other so that they define two independent subsets 11a, 11b of paths for the passage of gas flow into each tube 2 of the exchanger .
De acuerdo con la presente invention, la altura interior de los tubos 2 de paso de gases del intercambiador 1 se disena de modo que es posible introducir en su interior al menos dos conjuntos 8a, 8b o 8c, 8d de aletas 8, dispuestos apilados uno sobre otro. Gracias a ello, es 5 posible obtener un intercambiador de diseno compacto como el representado en la figura 1. Este intercambiador 1 presenta una muy elevada eficacia y reducida longitud de tubos 2, lo que permite ganar espacio para el diseno optimo y la facilidad de montaje de los elementos de ensamble, como por ejemplo, el deposito 6 de gas o la brida 7 de conexion con la llnea de recirculacion de gases.In accordance with the present invention, the internal height of the gas passage tubes 2 of the exchanger 1 is designed so that it is possible to introduce at least two sets 8a, 8b or 8c, 8d of fins 8, arranged stacked one over another. Thanks to this, it is possible to obtain a compact design exchanger as shown in Figure 1. This exchanger 1 has a very high efficiency and reduced length of tubes 2, which allows to gain space for optimal design and ease of assembly of the assembly elements, such as the gas tank 6 or the connection flange 7 with the gas recirculation line.
1010
En las dos realizaciones que se describe, los dos conjuntos de aletas 8a, 8b y 8c, 8d se han dispuesto uno sobre otro de modo que un extremo de uno de los conjuntos de aletas 8a, 8c queda situado en una position avanzada o retrasada segun la direction longitudinal respecto a la posicion del extremo 8b, 8d del otro conjunto de aletas 8 situado en una posicion inferior 15 (ver figuras 2, 3, 5 y 7).In the two embodiments described, the two sets of fins 8a, 8b and 8c, 8d are arranged one above the other so that one end of one of the sets of fins 8a, 8c is located in an advanced or delayed position according to the longitudinal direction with respect to the position of the end 8b, 8d of the other set of fins 8 located in a lower position 15 (see figures 2, 3, 5 and 7).
A pesar de que se ha hecho referencia a una realization concreta de la invencion, es evidente para un experto en la materia que el intercambiador descrito es susceptible de numerosas variaciones y modificaciones, y que todos los detalles mencionados pueden ser substituidos 20 por otros tecnicamente equivalentes, sin apartarse del ambito de protection definido por las reivindicaciones adjuntas. Por ejemplo, aunque en las figuras se ha representado realizaciones de elementos perturbadores configurados a modo de aletas 8 tipos "offset fin” o "wavy fin”, la misma invencion podrla implementarse con elementos perturbadores de una configuration distinta dispuestos uno sobre otro en el interior de tubos o placas.Although reference has been made to a specific embodiment of the invention, it is evident to one skilled in the art that the described exchanger is susceptible of numerous variations and modifications, and that all the mentioned details can be replaced by other technically equivalent ones. , without departing from the scope of protection defined by the appended claims. For example, although embodiments of disturbing elements configured as fins 8 types "offset end" or "wavy end" have been shown in the figures, the same invention could be implemented with disturbing elements of a different configuration arranged one above the other inside of tubes or plates.
Claims (8)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201530833A ES2594361B1 (en) | 2015-06-15 | 2015-06-15 | HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE |
| PCT/EP2016/063702 WO2016202832A1 (en) | 2015-06-15 | 2016-06-15 | Heat exchanger for gas, particularly for the exhaust gases of an engine |
| EP16731830.2A EP3308094A1 (en) | 2015-06-15 | 2016-06-15 | Heat exchanger for gas, particularly for the exhaust gases of an engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201530833A ES2594361B1 (en) | 2015-06-15 | 2015-06-15 | HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2594361A1 ES2594361A1 (en) | 2016-12-19 |
| ES2594361B1 true ES2594361B1 (en) | 2017-09-26 |
Family
ID=56203332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES201530833A Expired - Fee Related ES2594361B1 (en) | 2015-06-15 | 2015-06-15 | HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3308094A1 (en) |
| ES (1) | ES2594361B1 (en) |
| WO (1) | WO2016202832A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759524B (en) * | 2018-06-08 | 2020-01-17 | 陕西益信伟创智能科技有限公司 | Bionic-based curved rib-shaped micro-staggered alveolar heat exchanger core and heat exchanger |
| ES2737123A1 (en) * | 2018-07-03 | 2020-01-10 | Valeo Termico Sa | HEAT EXCHANGER FOR GASES, ESPECIALLY FOR EXHAUST GASES OF AN ENGINE, AND DANGER BODY FOR SUCH EXCHANGER (Machine-translation by Google Translate, not legally binding) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1882037U (en) * | 1963-08-29 | 1963-11-07 | Friedrich Dr Ing Hermann | TUBULAR BODY FOR HEAT EXCHANGER. |
| FR1494167A (en) * | 1966-07-15 | 1967-09-08 | Chausson Usines Sa | Heat exchanger, in particular for motor vehicles and similar applications |
| DE102006033570A1 (en) * | 2006-07-20 | 2008-01-24 | Modine Manufacturing Co., Racine | Shallow heat exchange tube, has inner insert designed and arranged for spiral flow of medium in tube |
| JP5226393B2 (en) * | 2008-06-12 | 2013-07-03 | 株式会社ティラド | Heat exchanger |
| JP5244845B2 (en) * | 2010-03-31 | 2013-07-24 | 株式会社ユタカ技研 | Heat exchanger |
| WO2013080611A1 (en) * | 2011-12-02 | 2013-06-06 | 古河スカイ株式会社 | Heat exchanger and method for manufacturing same |
-
2015
- 2015-06-15 ES ES201530833A patent/ES2594361B1/en not_active Expired - Fee Related
-
2016
- 2016-06-15 WO PCT/EP2016/063702 patent/WO2016202832A1/en not_active Ceased
- 2016-06-15 EP EP16731830.2A patent/EP3308094A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP3308094A1 (en) | 2018-04-18 |
| ES2594361A1 (en) | 2016-12-19 |
| WO2016202832A1 (en) | 2016-12-22 |
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