WO1982001582A1 - Heat exchanger for domestic central heating boilers - Google Patents

Heat exchanger for domestic central heating boilers Download PDF

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Publication number
WO1982001582A1
WO1982001582A1 PCT/FR1981/000133 FR8100133W WO8201582A1 WO 1982001582 A1 WO1982001582 A1 WO 1982001582A1 FR 8100133 W FR8100133 W FR 8100133W WO 8201582 A1 WO8201582 A1 WO 8201582A1
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WIPO (PCT)
Prior art keywords
tubes
exchanger
heat exchanger
water
heating boilers
Prior art date
Application number
PCT/FR1981/000133
Other languages
French (fr)
Inventor
Duval Eau Chaude Chauffage S D E C Saunier
Original Assignee
Charron Jean C
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Charron Jean C filed Critical Charron Jean C
Publication of WO1982001582A1 publication Critical patent/WO1982001582A1/en

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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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/145—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/403—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the water tubes being arranged in one or more circles around the burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1669—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having an annular shape; the conduits being assembled around a central distribution tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section

Definitions

  • the present invention relates very particularly but not exclusively to domestic boilers of central heating with hot water by gas of the sealed type with forced draft. It relates to a new exchanger which makes it possible to operate said boilers with partial or total recovery of the calories contained in the water vapor produced by the condensation of gas.
  • this water vapor is evacuated through the chimney in pure loss with the combustion products at a temperature generally between 110 ° and 250 ° C; this loss, which is equal to the latent heat of condensation or vaporization of water vapor, represents approximately 10% of the calorific value of the gas. To recover these lost calories, you must be able to condense this steam, which is what is done in so-called condensing boilers.
  • This exchanger can be of the scroll type or consists of sheets of smooth copper tubes or provided with fins extruded in the mass.
  • this type of exchanger is of high cost and particularly bulky since it involves a large intermediate exchange surface made of very conductive material to obtain condensation.
  • this type of exchanger presents production difficulties, in particular at the time of shaping.
  • part of the material used for the realization of the spiral-shaped plate participates only for a very small part in the heat flux exchanged due to its low thermal conductivity and its role which is assimilated to an exchange surface. intermediate between the products of combustion and the water circulation channels.
  • the present invention makes it possible to avoid these drawbacks eind aim to produce a heat exchanger for condensing boilers that is particularly simple and economical while having high performance.
  • the subject of the invention is a heat exchanger comprising a sheet of longitudinal tubes with an elongated section arranged along the generatrix of a cylinder, characterized in that the angle of convergence of the lateral faces of each of the exchanger tubes is between 4 ° and 6 °, - that the lateral faces of the tubes have a length substantially equal to three times the average thickness of the tube and- that the lateral faces of two neighboring tubes form an angular deviation seen from the axis of revolution of 0, 5 ° to 1 °.
  • the exchanger has inside a chamber 1 which collects the burnt gases and evacuates them through the chimney 2, a radial burner 3 placed in the center and a sheet of water tubes 4 arranged vertically and concentrically to the burner.
  • the number of longitudinal tubes forming the exchanger is equal to 72.
  • the water admitted by an inlet conduit 5 into a lower collector 6 circulates in a bundle of tubes 4 to reach the upper collector 7 then again by another bundle of tubes returns to the lower collector and so on before reaching the outlet conduit 8 the water has therefore traveled, by bundles of successive tubes, around the exchanger.
  • the sheet of tubes 4 forms in enclosure 1 two separate concentric chambers, the first, the combustion chamber 9 proper, situated inside around the burner 3 and the second, the chamber 10 for evacuating combustion products. located between the downstream face of the tubes 4 and the outer walls of the enclosure 1.
  • the tubes have a substantially trapezoidal profile so that the lateral faces 11 of each tube are substantially parallel to the lateral faces of neighboring tubes in order to provide between each of them a substantially constant interval 12 of small thickness and nevertheless delimited by two large surfaces planes facilitating the flow of gases from the combustion chamber 9 to the exhaust chamber 10.
  • the side faces 11 of the tubes 4 have a length substantially equal to three times the average thickness of the tube and form between them an angle ⁇ between 4 ° and 6 °.
  • the angular difference ⁇ seen from the axis of revolution 13 between the side faces of two neighboring tubes is between 0.5 ° and 1 °.
  • the points of convergence 14 of the lateral faces 11 of each tube 4 are located on a circle 15, the center of which coincides with the axis of revolution 13 of the exchanger.
  • This exchanger for condensing boilers is therefore of simple construction and of reduced size while having high performance, and depending on the power which it is desired to obtain, it suffices only to increase or decrease the length of the tubes which allows the same tool to be used for manufacturing.
  • the invention is not limited to the embodiment described above but on the contrary encompasses all the constructive characteristics.

Landscapes

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

Abstract

Heat exchanger for central heating boilers of the forced draught, sealed type. The heat exchanger comprises a bundle of tubes (4) having a substantially trapezoidal cross-section disposed according to a cylinder generatrix for forming an internal combustion chamber. The side faces (11) of the tubes have a length which is substantially three times the average thickness of the tube and form an angle of 4` to 6`. The angle between the side faces of two neighbouring tubes, seen from the axis of revolution of the exchanger, is between 0.5` and 1`.

Description

ECHANGEUR DE CHALEUR POUR CHAUDIERES DOMESTIQUES DE CHAUFFAGE CENTRAL. HEAT EXCHANGER FOR DOMESTIC CENTRAL HEATING BOILERS.
La présente invention se rapporte tout particulièrement mais non exclusivement aux chaudières domestiques de chauffage central à eau chaude par le gaz du type étanche à tirage forcé. Elle a pour objet un nouvel échangeur qui permet de faire fonctionner lesdites chaudières avec une récupération partielle ou totale des calories contenues dans la vapeur d'eau produite par la condensation du gaz.The present invention relates very particularly but not exclusively to domestic boilers of central heating with hot water by gas of the sealed type with forced draft. It relates to a new exchanger which makes it possible to operate said boilers with partial or total recovery of the calories contained in the water vapor produced by the condensation of gas.
En effet, on sait que lors de la combustion d'un gaz contenant du carbone et de l'hydrogène ce qui est le cas de presque tous les gaz combustibles, l'hydrogène se combine avec l'oxygène de l'air pour produire de la vapeur d'eau.In fact, we know that during the combustion of a gas containing carbon and hydrogen, which is the case with almost all combustible gases, hydrogen combines with oxygen in the air to produce water vapor.
Dans les chaudières équipées d'un échangeur de chaleur classique, cette vapeur d'eau est évacuée par la cheminée en pure perte avec les produi ts de combustion à une température généralement comprise entre 110° et 250°C ; cette perte qui est égale à la chaleur latente de condensation ou de vaporisation de la vapeur d'eau représente environ 10 % du pouvoir calorifique du gaz. Pour récupérer ces calories perdues, il faut pouvoir condenser cette vapeur, c'est ce qui est réalisé dans les chaudières dites à condensation. Malheureusement, pour pouvoir condenser la vapeur d'eau contenue dans les produits de combustion, il faut pouvoir les refroidir à une température inférieure à la température dite de rosée qui se situe en général autour de 55ºC, cela veut dire qu'on ne pourra jamais condenser cette vapeur d'eau si l'eau de chauffage circulant dans la chaudière est à une température supérieure à la température du point de rosée des produits de combustion qui dans la pratique, se situe autour de 55°C, ou si les surfaces d'échange en contact avec les produits de combustion sont elles-même à une température supérieure à celle-ci. C'est pourquoi sur la plupart des chaudières à condensation connues, l'eau du circuit â chauffer est mise en contact direct avec les produits de combustion en utilisant soit une pulvérisation de l'eau à travers les produits de combustion, soit le principe du brûleur sub mergé, soit le principe du lit fluidisé ou encore le principe du ruissellement de l'eau sur des plateaux.In boilers equipped with a conventional heat exchanger, this water vapor is evacuated through the chimney in pure loss with the combustion products at a temperature generally between 110 ° and 250 ° C; this loss, which is equal to the latent heat of condensation or vaporization of water vapor, represents approximately 10% of the calorific value of the gas. To recover these lost calories, you must be able to condense this steam, which is what is done in so-called condensing boilers. Unfortunately, to be able to condense the water vapor contained in the combustion products, it must be possible to cool them to a temperature below the so-called dew temperature which is generally around 55ºC, this means that we will never be able to condense this water vapor if the heating water circulating in the boiler is at a temperature higher than the dew point temperature of the combustion products which in practice is around 55 ° C, or if the surfaces d exchange in contact with the combustion products are themselves at a temperature higher than this. This is why on most of the known condensing boilers, the water of the circuit to be heated is brought into direct contact with the products of combustion by using either a spraying of water through the products of combustion, or the principle of sub burner merged, either the principle of the fluidized bed or the principle of water runoff on trays.
Mais dans toutes ces chaudières, il n'existe pas de séparation physique entre les produits de combustion et le circuit d'eau primaire. De plus, il est nécessaire de prévoir un échangeur supplémentaire entre le circuit primaire et le circuit secondaire, en raison de l'agressivité élevée de l'eau du circuit primaire en contact direct avec les produits de combustion. Par ailleurs, le contact direct eau-produits de combustion présente des inconvénients. Tout d'abord il limite l'emploi de ce type de générateur par exemple au chauffage de l'eau de bassins ou de piscines car la température de sortie de l'eau est relativement basse et au cours de ce contact, l'eau s'acidifie par dissolution du gaz carbonique qui donne naissance à de l'acide carbonique ce qui diminue la longévité des appareils. On connait également des chaudières à condensation dans lesquelles il existe une séparation physique entre l'eau et les produits de combustion. La condensation apparait, par suite des caractéristiques exceptionnelles de l'échangeur, dès que la température de l'eau de retour de la chaudière est inférieure à 50°C. Cet échangeur peut être du type à volute ou constitué par des nappes de tubes en cuivre lisse ou munies d'ailettes extrudëes dans la masse. Mais ce type d'échangeur est d'un coût élevé et particulièrement volumineux puisqu'il fait intervenir une surface d'échange intermédiaire importante en matériau très conducteur pour obtenir la condensation. Par contre, on connait des échangeurs réalisés à partir d'une plaque en alliage inoxydable et ayant la forme d'une spirale pour amener les gaz chauds à effectuer un cheminement particulier le long de ladite plaque. Mais ce genre d'échangeur présente des difficultés de réalisation notamment au momment de la mise en forme. En outre une partie du matériau utilisé pour la réalisation de la plaque en forme de spirale ne participe que pour une très faible part au flux thermique échangé du fait de sa faible conductibilité thermique et de son rôle qui s'assimile à une surface d'échange intermédiaire entre les produits de combustion et les canaux de circulation d'eau. La présente invention permet d'éviter ces inconvénients eind pour but de réaliser un échangeur de chaleur pour chaudières à condensation particulièrement simple et économique tout en ayant des performances élevées.But in all these boilers, there is no physical separation between the combustion products and the primary water circuit. In addition, it is necessary to provide an additional exchanger between the primary circuit and the secondary circuit, due to the high aggressiveness of the water in the primary circuit in direct contact with the combustion products. Furthermore, direct contact with water and combustion products has drawbacks. First of all, it limits the use of this type of generator, for example to the heating of water in basins or swimming pools because the water outlet temperature is relatively low and during this contact, the water s acidifies by dissolving carbon dioxide which gives rise to carbonic acid which decreases the longevity of the devices. There are also known condensing boilers in which there is a physical separation between water and combustion products. Condensation appears, due to the exceptional characteristics of the exchanger, as soon as the temperature of the boiler return water is below 50 ° C. This exchanger can be of the scroll type or consists of sheets of smooth copper tubes or provided with fins extruded in the mass. However, this type of exchanger is of high cost and particularly bulky since it involves a large intermediate exchange surface made of very conductive material to obtain condensation. On the other hand, there are known exchangers made from a stainless alloy plate and having the shape of a spiral to cause the hot gases to carry out a particular path along said plate. However, this type of exchanger presents production difficulties, in particular at the time of shaping. In addition, part of the material used for the realization of the spiral-shaped plate participates only for a very small part in the heat flux exchanged due to its low thermal conductivity and its role which is assimilated to an exchange surface. intermediate between the products of combustion and the water circulation channels. The present invention makes it possible to avoid these drawbacks eind aim to produce a heat exchanger for condensing boilers that is particularly simple and economical while having high performance.
L'invention a pour objet un échangeur de chaleur comprenant une nappe de tubes longitudinaux à section allongée disposée suivant la génératrice d'un cylindre caractérisé par le fait-que l'angle de convergence des faces latérales de chacun des tubes échangeurs est compris entre 4° et 6°,- que les faces latérales des tubes ont une longueur sensiblement égale à trois fois l'épaisseur moyenne du tube et- que les faces latérales de deux tubes voisins forment un écart angulaire vu de l'axe de révolution de 0,5° à 1°.The subject of the invention is a heat exchanger comprising a sheet of longitudinal tubes with an elongated section arranged along the generatrix of a cylinder, characterized in that the angle of convergence of the lateral faces of each of the exchanger tubes is between 4 ° and 6 °, - that the lateral faces of the tubes have a length substantially equal to three times the average thickness of the tube and- that the lateral faces of two neighboring tubes form an angular deviation seen from the axis of revolution of 0, 5 ° to 1 °.
D'autres caractéristiques particulières et avantages de l'invention ressortiront de la description suivante dans laquelle on se réfère aux dessins annexés qui représentent :Other particular characteristics and advantages of the invention will emerge from the following description in which reference is made to the appended drawings which represent:
- figure 1 : une vue schématique en élévation latérale de l'échangeur,- Figure 1: a schematic side elevation view of the exchanger,
- figure 2 : une vue en coupe de l'échangeur,- Figure 2: a sectional view of the exchanger,
- figure 3 : une vue â plus grande échelle des tubes d'eau.- Figure 3: an enlarged view of the water tubes.
Comme représenté aux figures, l'échangeur comporte à l'intérieur d'une enceinte 1 qui collecte les gaz brûlés et les évacue par la cheminée 2, un brûleur radial 3 disposé au centre et une nappe de tubes d'eau 4 disposés verticalement et concentriquement au brûleur. Le nombre de tubes longitudinaux formant l'échangeur est' égal à 72. L'eau admise par un conduit d'entrée 5 dans un collecteur inférieur 6 circule dans un faisceau de tubes 4 pour gagner le collecteur supérieur 7 puis à nouveau par un autre faisceau de tubes revient au collecteur inférieur et ainsi de suite avant d'aboutir au conduit de sortie 8 l'eau a donc parcouru, par faisceaux de tubes successifs, le tour de l 'échangeur.As shown in the figures, the exchanger has inside a chamber 1 which collects the burnt gases and evacuates them through the chimney 2, a radial burner 3 placed in the center and a sheet of water tubes 4 arranged vertically and concentrically to the burner. The number of longitudinal tubes forming the exchanger is equal to 72. The water admitted by an inlet conduit 5 into a lower collector 6 circulates in a bundle of tubes 4 to reach the upper collector 7 then again by another bundle of tubes returns to the lower collector and so on before reaching the outlet conduit 8 the water has therefore traveled, by bundles of successive tubes, around the exchanger.
La nappe de tubes 4 forme dans l'enceinte 1 deux chambres concentriques distinctes, la première, la chambre de combustion 9 proprement dite, située à l'intérieur autour du brûleur 3 et la seconde, la chambre 10 d'évacuation des produits de combustion située entre la face avale des tubes 4 et les parois extérieures de l'enceinte 1. Les tubes présentent un profil sensiblement trapézoïdal de telle manière que les faces latérales 11 de chaque tube soient sensiblement parallèles aux faces latérales des tubes voisins afin de ménager entre chacune d'elles un intervalle sensiblement constant 12 de faible épaisseur et néamoins délimité par deux grandes surfaces planes facilitant l'écoulement des gaz de la chambre de combustion 9 vers la chambre d'évacuation 10.The sheet of tubes 4 forms in enclosure 1 two separate concentric chambers, the first, the combustion chamber 9 proper, situated inside around the burner 3 and the second, the chamber 10 for evacuating combustion products. located between the downstream face of the tubes 4 and the outer walls of the enclosure 1. The tubes have a substantially trapezoidal profile so that the lateral faces 11 of each tube are substantially parallel to the lateral faces of neighboring tubes in order to provide between each of them a substantially constant interval 12 of small thickness and nevertheless delimited by two large surfaces planes facilitating the flow of gases from the combustion chamber 9 to the exhaust chamber 10.
En se reportant à la figure 3, on voit que les faces latérales 11 des tubes 4 ont une longueur sensiblement égale à trois fois 1 'êpaisseur moyenne du tube et forment entre elles un angle α compris entre 4° et 6°. De plus, l'écart angulaire β vu de l'axe de révolution 13 entre les faces latérales de deux tubes voisins est compris entre 0,5° et 1°.Referring to Figure 3, we see that the side faces 11 of the tubes 4 have a length substantially equal to three times the average thickness of the tube and form between them an angle α between 4 ° and 6 °. In addition, the angular difference β seen from the axis of revolution 13 between the side faces of two neighboring tubes is between 0.5 ° and 1 °.
Les points de convergence 14 des faces latérales 11 de chaque tube 4 sont situés sur un cercle 15 dont le centre est confondu avec 1 'axe de révolution 13 de l'échangeur.The points of convergence 14 of the lateral faces 11 of each tube 4 are located on a circle 15, the center of which coincides with the axis of revolution 13 of the exchanger.
Lorsque le brûleur 3 fonctionne, les produits de combustion passent par les intervalles 12 et lèchent les tubes 4, mais étant donné le faible intervalle, l'écoulement des produits de combustion est fortement accéléré, ce qui permet .d'obtenir un coefficient d'échange plus important.When the burner 3 is operating, the combustion products pass through the intervals 12 and lick the tubes 4, but given the short interval, the flow of the combustion products is greatly accelerated, which makes it possible to obtain a coefficient of more important exchange.
Cet échangeur pour chaudière à condensation est donc de réalisation simple et de dimension réduite tout en ayant des performances élevées,et en fonction de la puissance que l'on désire obtenir, il suffit seulement d'augmenter ou de diminuer la longeur des tubes ce qui permet d'utiliser le même outillage pour la fabrication.This exchanger for condensing boilers is therefore of simple construction and of reduced size while having high performance, and depending on the power which it is desired to obtain, it suffices only to increase or decrease the length of the tubes which allows the same tool to be used for manufacturing.
L'invention ne se limite pas à la forme de réalisation précédemment décrite mais englobe au contraire toutes les caractéristiques constructives. The invention is not limited to the embodiment described above but on the contrary encompasses all the constructive characteristics.

Claims

Revendications. Claims.
1. Echangeur de chaleur pour chaudières domestiques de chauffage à eau par le gaz du type étanche à tirage forcé comprenant une nappe de tubes longitudinaux à section allongée dans lesquels circule le fluide à réchauffer, disposés suivant la gëneratrice d'un cylindre pour former une chambre de combustion intérieure cylindrique caractérisé par le fait-que l'angle de convergence α et des faces latérales (11) de chacun des tubes échangeurs (4) est compris entre 4° et 6°, -que les faces latérales (11) des tubes ont une longueur sensiblement égale à trois fois l'épaisseur moyenne du tube et-que les faces latérales (11) de deux tubes voisins forment un écart angulaire β vu de 1 'axe de révolution (13) de 0,5° à 1°. 1. Heat exchanger for domestic water heating boilers of the sealed type with forced draft comprising a sheet of longitudinal tubes of elongated section in which the fluid to be heated circulates, arranged along the generator of a cylinder to form a chamber cylindrical internal combustion characterized by the fact that the angle of convergence α and the lateral faces (11) of each of the exchanger tubes (4) is between 4 ° and 6 °, -that the lateral faces (11) of the tubes have a length substantially equal to three times the average thickness of the tube, and the side faces (11) of two neighboring tubes form an angular distance β seen from the axis of revolution (13) of 0.5 ° to 1 ° .
2. Echangeur selon la revendication 1 caractérisé par le fait que le nombre de tubes longitudinaux (4) formant la chambre de combustion cylindrique (9) est égal à 72. 2. Exchanger according to claim 1 characterized in that the number of longitudinal tubes (4) forming the cylindrical combustion chamber (9) is equal to 72.
PCT/FR1981/000133 1980-10-24 1981-10-22 Heat exchanger for domestic central heating boilers WO1982001582A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP80401514A EP0050696A1 (en) 1980-10-24 1980-10-24 Heat exchanger for domestic central-heating boilers
EP80401514801024 1980-10-24

Publications (1)

Publication Number Publication Date
WO1982001582A1 true WO1982001582A1 (en) 1982-05-13

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PCT/FR1981/000133 WO1982001582A1 (en) 1980-10-24 1981-10-22 Heat exchanger for domestic central heating boilers

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EP (1) EP0050696A1 (en)
JP (1) JPS57501881A (en)
WO (1) WO1982001582A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745813A2 (en) * 1995-05-31 1996-12-04 VIESSMANN WERKE GmbH & CO. Heat exchanger, especially for a boiler
DE10002894B4 (en) * 1999-01-21 2010-01-21 Vaillant Gmbh water heater
EP2154444A3 (en) * 2008-08-16 2012-06-06 Robert Bosch GmbH Heat exchanger for a heating device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2100344A1 (en) * 1970-01-08 1971-07-15 Glow-Worm Ltd., Belper, Derby (Großbritannien) Heat exchangers and water heaters made using such heat exchangers
FR2315667A1 (en) * 1975-06-28 1977-01-21 Stoves Ltd HEAT EXCHANGER FOR A GAS WATER HEATING APPLIANCE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2100344A1 (en) * 1970-01-08 1971-07-15 Glow-Worm Ltd., Belper, Derby (Großbritannien) Heat exchangers and water heaters made using such heat exchangers
FR2315667A1 (en) * 1975-06-28 1977-01-21 Stoves Ltd HEAT EXCHANGER FOR A GAS WATER HEATING APPLIANCE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745813A2 (en) * 1995-05-31 1996-12-04 VIESSMANN WERKE GmbH & CO. Heat exchanger, especially for a boiler
EP0745813A3 (en) * 1995-05-31 1997-12-29 VIESSMANN WERKE GmbH & CO. Heat exchanger, especially for a boiler
DE10002894B4 (en) * 1999-01-21 2010-01-21 Vaillant Gmbh water heater
EP2154444A3 (en) * 2008-08-16 2012-06-06 Robert Bosch GmbH Heat exchanger for a heating device

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Publication number Publication date
JPS57501881A (en) 1982-10-21
EP0050696A1 (en) 1982-05-05

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