EP2008048B1 - Structure d'un echangeur de chaleur - Google Patents

Structure d'un echangeur de chaleur Download PDF

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Publication number
EP2008048B1
EP2008048B1 EP07736701A EP07736701A EP2008048B1 EP 2008048 B1 EP2008048 B1 EP 2008048B1 EP 07736701 A EP07736701 A EP 07736701A EP 07736701 A EP07736701 A EP 07736701A EP 2008048 B1 EP2008048 B1 EP 2008048B1
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EP
European Patent Office
Prior art keywords
heat exchanger
fact
radiating
exchanger structure
structure according
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.)
Active
Application number
EP07736701A
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German (de)
English (en)
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EP2008048A2 (fr
Inventor
Daniele Bresti
Erica Moretti
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CUBO D Srl
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CUBO D Srl
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/087—Tap water heat exchangers specially adapted therefore

Definitions

  • the present invention relates to a heat exchanger structure that is particularly indicated for central heating boilers and the production of sanitary hot water.
  • a heat exchanger is any type of equipment designed for thermal exchange between liquids separated by a conducting wall.
  • the exchange of heat between two liquids is generally obtained across a surface made of a good heat-conducting material, such as metal, which separates the two liquids that flow through the exchanger at the same time: in this way, the heat is transmitted, across the surface, from the hotter liquid to the cooler one.
  • the exchangers that are currently on the market that are present in central heating and water heater boilers are usually of the tubular type, so that the first liquid flows inside the pipes and the second flows along the outside.
  • the exchanger is composed of a coiled pipe or various pipes placed horizontally, over a burner used to heat the air that then comes into contact with the metal surface designed to remove heat from the air and transfer it to the water inside the pipes.
  • the pipes are connected to a cold water inlet pipe and a hot water outlet pipe; which, while flowing through the exchanger pipes, is heated.
  • the exchanger on the outside of the pipes, has a plurality of metal plates that are designed to increase the thermal exchange surface.
  • the heat, produced during the first burner phase and dispersed in the fumes after passing through the exchanger, is used to heat the area surrounding the exchanger itself in order to be able to use it further but this means that the structure and devices in the exchanger need to have a very complex design.
  • condensation boilers have proved to be more delicate and subject to wear and deterioration of the devices and components.
  • patent EP 1.136.667 shows a heat exchanger structure featuring a pair of radiating elements, each of which is composed of two parts which are mutually coupled in a symmetrical manner as defined in the preamble of claim 1.
  • the external flow is not continuous and uniform, as it is interrupted by a series of dividers, therefor the radiating element is lapped by the fluid only in the three central zones and not over the entire surface, creating a discontinuity and differences in temperature, and has mutually perpendicular flows.
  • German patent DE 873921 shows a modular structure composed of a plurality of radiating elements, each of which is composed of a pair of internal elements equipped with fins and a pair of external portions whose function is to contain and clad the internal elements.
  • the two internal elements are mutually coupled so that the fins are mutually interposed in a parallel fashion.
  • Each external portion features, externally, a series of loops which, when the two portions are coupled, create channels.
  • each radiating element is composed of two internal elements and two external cladding portions, therefore the said radiating element is composed of several pieces which must be assembled.
  • Patent DE 37 04 215 features a heat exchanger composed of a single radiating element, which is composed of two mutually different, mutually coupling half-parts.
  • the radiating element is absolutely not couplable with another identical element way, therefore it is not possible to create a heat exchanger consisting of a plurality of elements.
  • the aim of the present invention is substantially to resolve the problems of the current techniques by overcoming the difficulties described above by means of a heat exchanger structure, which is able to completely exploit all the heat produced by a burner to heat a liquid with just one flow cycle and without the recovery of the fumes.
  • the second aim of the present invention is to have a heat exchanger structure that allows the flow of heat across an exchange surface that is considerably increased.
  • the third aim of the present invention is to have a heat exchanger structure that allows considerable saving of energy consumption of the burner for the same flow heated and temperature obtained.
  • Another aim of the present invention is to have a heat exchanger structure that has a simple and modular structure and a small overhang and that is able to exploit all the unused spaces inside boilers.
  • a further aim of the present invention derives from the fact that the heat exchanger allows the liquid heating to be performed in a single phase.
  • the last but not least important aim of the present invention is to produce a heat exchanger that is simple to produce and that works well.
  • the heat exchanger structure 1 is substantially composed of a frame 2 inside which are arranged, parallel with each other, a plurality of radiating components 3.
  • Each radiating component 3 is substantially composed of a pair of basic components 3a and 3b that are coupled with each other symmetrically as shown in figures 16 to 20 .
  • each basic component 3a or 3b is composed of a plate 30 with, on the inner side, a plurality of primary wings 31, equally spaced from each other and positioned orthogonally to the plate itself, and on the outer side a series of secondary wings 32, which are also positioned orthogonally to the plate 30 and equally spaced from each other, but closer to each other than the primary wings 31 as shown in figures 13, 15 and 22 .
  • the secondary wings 32 are designed to absorb the heat produced by a burner 4 positioned under the frame 2 of the exchanger and transmit it to the plate 30 and the primary wings 31 inside the radiating component, so that it is transmitted to the liquid that flows inside the space 34, created by the coupling of the two basic components 3a and 3b.
  • the plate 30 is equipped with two projections 30a and 30b forming an arch, facing each other and designed to couple with the corresponding projection present on the other basic component forming a channel 350 as shown in figures 16, 17, 18 , 19 and 20 .
  • the frame 2 is equipped with at least one first cold liquid inlet duct 5 positioned below the base of the frame itself.
  • the first duct 5 is connected to the space 34 of each radiating component 3 by means of a first passage 35 present in the duct 5 and through which the liquid from the duct 5 enters the first channel 350 created by the coupling of the projections 30a in each radiating component present in the frame 2 as shown in figures 1 and 7 .
  • the frame 2 is provided with at least one second hot liquid outlet duct 6 positioned above the top of the frame itself.
  • the second duct 6 is also connected with the space 34 of each radiating component 3 by means of a second passage 36 present in the duct 6 and through which the liquid, from the second channel 350 created by the coupling of the projections 30b, enters the duct 6 from the opposite side to the plate with respect to the passage 35.
  • the exchanger is equipped with two first cold liquid inlet ducts 5 in the plurality of radiating components and two second outlet ducts 6 for the liquid output that in the meantime has been heated by the plurality of radiating components.
  • each basic component is composed of extruded or moulded metal so the manufacturing of the entire exchanger is very simple, as it is achieved by the assembly of two basic components to obtain a radiating component 3 and the arrangement of a plurality of radiating components that are arranged vertically and parallel with one another.
  • the first and the last basic components do not have the external wings 32 as shown in figure 1 .
  • the exchanger has an enclosing wall 7 as shown in figures 2 and 3 .
  • the functioning principle of the heat exchanger structure in question is achieved by the fact that the burner produces heat that heats the air present, which tends to rise upwards giving off a quantity of heat that is released, while moving upwards towards the boiler exhaust, to the radiating components inside which the water flows that receives heat from the metal structure that the radiating components removed from the air.
  • the air, while flowing from the burner to the exhaust, shall have released all its heat and used up its heating energy that has been taken up from the radiating components along the whole vertical length that the air moves along and not only for a short length as happened with the prior art where the exchanger had a very small vertical overhang as the pipes that constituted it and in which the water flowed were positioned horizontally.
  • the water that has to be heated enters the exchanger structure into the spaces 34 through the duct 5 after having passed through the passage 35 and entered the first channel 350 of each radiating component to then exit through the hot water duct 6 passing through the second channel 350 and the passage 36.
  • the water collects all the heat produced by the burner, completely exploiting it, and the air that exits through the boiler exhaust shall have used up all the heat energy contained in it and shall be at a low temperature.
  • the heating cycle may be continuous without interruptions or idle periods and without heat dispersal or the necessity to recover it to introduce it into the exchanger again as happens in many boilers of the prior art.
  • the configuration of the exchanger allows the use, and therefore complete exploitation of the heat produced by the burner at all the points as, the heat, while flowing through the boiler, always comes into contact with the exchanger structure in every horizontal and vertical section.
  • the present invention therefore achieves the aims proposed.
  • the exchanger structure according to the present invention allows the complete exploitation of all the heat produced by a burner to heat a liquid with just one cycle and without recovering the fumes.
  • the vertical configuration of the plates and the vertical water cycle allows all the heat produced by the burner to be used while flowing from the bottom to the top.
  • the radiating components are able to absorb all the heat produced and transmit it to the water that is flowing inside them.
  • the exchanger in question allows the heat to pass across an exchange surface that is considerably increased due to the presence of plates and not a pipe, as happened in the prior art, and internal wings.
  • the heat exchanger structure allows a considerable saving to be made in the energy consumption of the burner, with the same flow heated and temperature obtained, with savings in methane consumption, for example, of over 50% due to the fact that all the heat produced is used and transferred to the water.
  • the reduced consumption of the burner allows the reduction, as a result, of the resulting emission into the atmosphere with resulting limitation and reduction of pollutants released into the air.
  • the heat exchanger structure is simple and modular, has a small overhang and exploits all the unused spaces present in the boilers of the prior art. Besides, the exchanger structure in question is able to transfer a greater quantity of heat in a smaller space, thereby reducing the possibility for dispersal unlike what happens in the boilers currently on the market.
  • the exchanger structure allows the upwards distribution of the heat produced by the burner to be exploited optimally with a large exchange surface.
  • the exchanger does not need containment and protection walls as is necessary with those of the prior art as while assembling the radiating components, the overall structure is already obtained so it is therefore possible to create a watertight chamber type boiler without the external structure.
  • the exchanger structure according to the present invention is simple, as it is the sum of a single piece, the radiating component, that is multiplied, unlike the components that compose the exchangers of the prior art that are composed of a certain number of single pieces that are different from each other and that are then assembled, so it is possible to build a very compact boiler with low manufacturing costs, even using a single radiating component.
  • a further advantage of the present exchanger derives from the fact that it is very versatile and easy to use; in fact it allows all the heat produced by the burner to be used, with a simple structure and a single operative cycle for the boiler.
  • the last but not least advantage of the present invention is that it is considerably easy to use, simple to manufacture and works well.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (11)

  1. Structure d'échangeur de chaleur essentiellement constitué par au moins un élément d'une pluralité d'éléments rayonnants (3) où chaque élément rayonnant (3) est constitué par une paire d'éléments de base (3a et 3b) accouplés les uns aux autres de façon symétrique, où chaque élément de base (3a ou 3b) est constitué par une plaque (30) ayant d'un côté une pluralité de premières ailettes (31) équitablement espacées et placées orthogonalement à la plaque, caractérisé en ce que chaque élément de base présente de l'autre côté une série de secondes ailettes (32) elles aussi placées orthogonalement à la plaque (30) et équitablement espacées mais de façon plus dense que les premières ailettes (31) et lesdits éléments rayonnants (3) sont disposés, de façon parallèle les uns par rapports aux autres, à l'intérieur d'un bâti (2), ledit bâti (2) étant muni d'au moins un premier conduit (5) d'entrée de liquide froid situé dans la partie inférieure de la base du bâti et d'au moins un second conduit (6) de sortie de liquide chaud situé au sommet de la structure.
  2. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce que lesdites secondes ailettes (32) sont destinées à absorber la chaleur produite par un brûleur (4) situé dans la partie inférieure du bâti (2) de l'échangeur et transmettre ladite chaleur à la plaque (30) et aux premières ailettes (31) à l'intérieur de l'élément rayonnant (3) de manière à ce qu'elle soit transmise au liquide qui coule à l'intérieur d'un espace (34) créé par l'accouplement des deux éléments de base (3a et 3b).
  3. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce que ladite plaque (30) est équipée de deux saillies (30a et 30b) configurées en arc, opposées et prévues pour s'accoupler à la saillie correspondante présente dans l'autre élément de base formant un canal (350).
  4. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce que ledit premier conduit (5) est raccordé à l'espace (34) de chaque élément rayonnant (3) moyennant un premier passage (35) présent dans le conduit et à travers lequel le liquide entre depuis le conduit (5) à l'intérieur du premier canal (350) créé par l'accouplement des saillies (30a) dans chaque élément rayonnant présent dans le bâti (2).
  5. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce que ledit second conduit (6) est lui aussi raccordé à l'espace (34) de chaque élément rayonnant (3) moyennant un second passage (36) présent dans le conduit (6) et à travers lequel le liquide sort dans le conduit (6) par le côté opposé de la plaque par rapport au passage (35), à partir du second canal (350) créé par l'accouplement des saillies (30b).
  6. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce qu'il est muni de deux premiers conduits (5) d'introduction du liquide froid dans la pluralité d'éléments rayonnants et de deux seconds conduits (6) pour la sortie du liquide qui a été réchauffé entre temps par la pluralité d'éléments rayonnants.
  7. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce que chaque élément de base (3a, 3b) est réalisé dans un matériau métallique pour l'emboutissage et l'extrusion.
  8. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce qu'elle est obtenue par l'assemblage de deux éléments de base pour avoir un élément rayonnant (3) et par la disposition d'une pluralité d'éléments rayonnants disposés verticalement et parallèles l'un par rapport à l'autre pour la structure dans son ensemble.
  9. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce que ledit premier et dernier élément de base ne présente par lesdites ailettes externes (32).
  10. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce qu'il présente une paroi de fermeture (7) au cas où ledit premier et dernier élément de base présente également des ailettes externes (32) aux extrémités.
  11. Structure d'échangeur de chaleur selon la revendication 1, caractérisé en ce qu'il présente un seul élément rayonnant (3).
EP07736701A 2006-03-17 2007-03-16 Structure d'un echangeur de chaleur Active EP2008048B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07736701T PL2008048T3 (pl) 2006-03-17 2007-03-16 Struktura wymiennika ciepła

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000020A ITMN20060020A1 (it) 2006-03-17 2006-03-17 Struttura di scambiatore di calore
PCT/IT2007/000196 WO2007108033A2 (fr) 2006-03-17 2007-03-16 Structure d'un echangeur de chaleur

Publications (2)

Publication Number Publication Date
EP2008048A2 EP2008048A2 (fr) 2008-12-31
EP2008048B1 true EP2008048B1 (fr) 2013-03-06

Family

ID=38352993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07736701A Active EP2008048B1 (fr) 2006-03-17 2007-03-16 Structure d'un echangeur de chaleur

Country Status (8)

Country Link
US (1) US20090178791A1 (fr)
EP (1) EP2008048B1 (fr)
CA (1) CA2658682A1 (fr)
DK (1) DK2008048T3 (fr)
ES (1) ES2416341T3 (fr)
IT (1) ITMN20060020A1 (fr)
PL (1) PL2008048T3 (fr)
WO (1) WO2007108033A2 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR471951A (fr) * 1914-05-07 1914-11-18 Oscar Muegler Lit susceptible d'etre allongé ou raccourci
US1850211A (en) 1929-04-27 1932-03-22 Wellington W Muir Radiator core for automobile cooling systems
DE873921C (de) 1941-01-30 1953-04-20 Artur Dietz Kuehler
DE3704215C2 (de) 1987-02-11 1995-11-30 Laengerer & Reich Kuehler Strangpreßprofilrohr für Wärmeaustauscher
US6840313B2 (en) * 1999-12-27 2005-01-11 Sumitomo Precision Products Co., Ltd. Plate fin type heat exchanger for high temperature
DE10014266A1 (de) 2000-03-22 2001-09-27 Zeuna Staerker Kg Luftgekühlter Abgaskühler für ein verbrennungsmotorisch angetriebenes Kraftfahrzeug
TW560836U (en) * 2003-03-05 2003-11-01 Hon Hai Prec Ind Co Ltd Combined fin
US8276654B2 (en) * 2005-11-17 2012-10-02 Hamilton Sundstrand Corporation Core assembly with deformation preventing features

Also Published As

Publication number Publication date
DK2008048T3 (da) 2013-06-17
PL2008048T3 (pl) 2013-09-30
ITMN20060020A1 (it) 2007-09-18
US20090178791A1 (en) 2009-07-16
ES2416341T3 (es) 2013-07-31
WO2007108033A2 (fr) 2007-09-27
WO2007108033A3 (fr) 2007-11-22
CA2658682A1 (fr) 2007-09-27
EP2008048A2 (fr) 2008-12-31

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