FR2502764A1 - Counter flow heat exchanger for central heating boiler - has casing with pipe bundles connecting collecting headers - Google Patents

Counter flow heat exchanger for central heating boiler - has casing with pipe bundles connecting collecting headers Download PDF

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Publication number
FR2502764A1
FR2502764A1 FR8105931A FR8105931A FR2502764A1 FR 2502764 A1 FR2502764 A1 FR 2502764A1 FR 8105931 A FR8105931 A FR 8105931A FR 8105931 A FR8105931 A FR 8105931A FR 2502764 A1 FR2502764 A1 FR 2502764A1
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FR
France
Prior art keywords
water
exchanger
chamber
exchanger according
fluids
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8105931A
Other languages
French (fr)
Other versions
FR2502764B3 (en
Inventor
Guy Pompidor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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 Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to FR8105931A priority Critical patent/FR2502764A1/en
Publication of FR2502764A1 publication Critical patent/FR2502764A1/en
Application granted granted Critical
Publication of FR2502764B3 publication Critical patent/FR2502764B3/fr
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
    • F28F2009/224—Longitudinal partitions

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  • 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

The counter flow heat exchanger is for the production of clean hot water in central heating boilers. A cylindrical case surrounds a bundle of longitudinal pipes. These connect a circular lower collector to a similar upper one. Water to be heated flows through these tubes. The cylindrical case is cut in two by a diametral partition (11) leaving a passage (12) between the two semi-chambers. Primary hot water enters by a pipe (8) in one semi-chamber and rises between longitudinal tubes (3), through which flows secondary water to be heated. This then drops to the outlet pipe (9).

Description

L'invention concerne un échangeur compact, fonctionnant a contre-courant pour la production d'eau chaude sanitaire dans les chaudieres de chauffage central notamment les chaudières a condensation.The invention relates to a compact exchanger, operating against the current for the production of domestic hot water in central heating boilers, in particular condensing boilers.

Parmi les échangeurs parcourus a contre-courant par deux fluides circulant dans deux circuits dont l'un -le fluide primaire- cede ses calories à l'autre, -le fluide secondaire qui est l'eau chaude sanitaire produite dans les chaudières, on connait les échangeurs a plaques ou a coupelles empilées les unes sur les autres et munies d'orifices de communication decalés pour le passage de fluide. Ces échangeurs qui ne sont pas forcément tres compacts sont délicats et coûteux a réaliser et presentent des pertes de charges qui interdisent leur utilisation quand les débits d'eau sont éleves comme c'est le cas dans certains types de chaudières notamment les chaudieres a condensation.Among the exchangers traversed against the current by two fluids circulating in two circuits, one of which - the primary fluid - gives up its calories to the other, - the secondary fluid which is domestic hot water produced in boilers, we know plate or cup exchangers stacked on top of each other and provided with offset communication orifices for the passage of fluid. These exchangers, which are not necessarily very compact, are delicate and costly to produce and have pressure drops which prohibit their use when the water flow rates are high, as is the case in certain types of boilers, in particular condensing boilers.

L'invention propose un type nouveau d'échangeur compact à deux liquides, particulierement adapté a la production d'eau chaude sanitaire des chaudières à condensation, qui reprend la technique de fabrication de faisceaux circulaires de tubes longitudinaux, à section allongée et faible intervalle entre eux.The invention proposes a new type of compact exchanger with two liquids, particularly suitable for the production of domestic hot water for condensing boilers, which takes up the technique of manufacturing circular bundles of longitudinal tubes, with an elongated section and a small interval between them.

L'échangeur selon l'invention est constitué d'une série de tubes longitudinaux reliant un collecteur circulaire inférieur et un collecteur circulaire supérieur, destinés à la circulation d'eau sanitaire, ces tubes étant eux-memes loges dans une enceinte cylindrique munie d'une cloison diamétrale à l'intérieur de laquelle circule a contre-courant le fluide primaire a partir d'un tube d'admission débouchant dans l'enceinte d'un côte de la cloison vers un tube de départ prévu de l'autre côté de la cloison.The exchanger according to the invention consists of a series of longitudinal tubes connecting a lower circular collector and an upper circular collector, intended for circulation of sanitary water, these tubes themselves being housed in a cylindrical enclosure provided with a diametrical partition inside which the primary fluid circulates against the current from an intake tube opening into the enclosure of one side of the partition towards a departure tube provided on the other side of partition.

D'autres caractéristiques particulieres de l'invention ressortiront de la description qui va suivre d'exemples de réalisation en réference aux dessins annexés qui représentent - figure 1 : une vue en élévation partiellement ecorchée de l'échangeur - figure 2 : une vue en coupe selon la ligne AA' de la figure 1. Other particular features of the invention will emerge from the description which follows of embodiments with reference to the appended drawings which represent - FIG. 1: a partially cutaway elevation view of the exchanger - FIG. 2: a sectional view along line AA 'in Figure 1.

L'échangeur de forme générale cylindrique comporte un plateau collecteur inferieur 1 et un plateau collecteur supérieur 2 reliés entre eux par des tubes 3 à section allongée qui forment une rosace autour d'un noyau central cylindrique 4. L'eau a chauffer (ou eau secondaire) est introduite dans le collecteur inférieur 1 par la tubulure 5 et récupérée à ce même collecteur par la tubulure 6. Le collecteur inférieur et le collecteur superieur sont munis de chicanes non représentées. Ainsi grâce à ce jeu de chicanes, l'eau à chauffer admise au collecteur 1 par la tubulure 5 montera par un premier tube 3a vers le collecteur supérieur 2 puis redescendra par le tube 3b vers le collecteur inférieur 1, de telle sorte que cette eau parcourera la totalite des tubes avant de ressortir par la tubulure 6.The generally cylindrical exchanger comprises a lower collecting plate 1 and an upper collecting plate 2 interconnected by tubes 3 of elongated section which form a rosette around a central cylindrical core 4. The water to be heated (or water secondary) is introduced into the lower manifold 1 through the tubing 5 and recovered at the same manifold by the tubing 6. The lower manifold and the upper manifold are provided with baffles not shown. Thus thanks to this set of baffles, the water to be heated admitted to the collector 1 by the tube 5 will rise by a first tube 3a towards the upper collector 2 then will descend by the tube 3b towards the lower collector 1, so that this water will run through all of the tubes before coming out through tubing 6.

Le noyau cylindrique 4 précité est fermé ; il est en appui contre le plateau collecteur supérieur 2, mais à sa partie inférieure il n'atteint pas le plateau 1 et est fermé par un disque obturateur 10. Une enveloppe cylindrique 7, en appui contre le collecteur inférieur 1 et le collecteur supérieur 2, délimite une chambre interieure destinée à être parcourue par le fluide primaire admis par le conduit d'entrée 8, et evacué par le conduit de sortie 9. Les deux conduits débouchent a proximite et à l'aplomb du disque obturateur 10 de part et d'autre d'une cloison diamétrale verticale 11 qui s'étend sur presque toute la hauteur de la chambre, à partir du collecteur inférieur 1, sans toutefois atteindre le collecteur supérieur 2, un passage 12 étant ainsi ménagé en partie haute entre les deux demi-chambres.Des promoteurs de turbulence 13 sont prévus à la peripherie de l'échangeur pour réduire la section de passage de l'eau primaire et faciliter les rechanges. Des promoteurs analogues peuvent aussi être places le long du noyau cylindrique central.The aforementioned cylindrical core 4 is closed; it is in abutment against the upper collector plate 2, but at its lower part it does not reach the plate 1 and is closed by a shutter disc 10. A cylindrical casing 7, in abutment against the lower collector 1 and the upper collector 2 , delimits an interior chamber intended to be traversed by the primary fluid admitted by the inlet duct 8, and evacuated by the outlet duct 9. The two ducts open close to and directly above the obturator disc 10 on either side 'another of a vertical diametrical partition 11 which extends over almost the entire height of the chamber, from the lower manifold 1, without however reaching the upper manifold 2, a passage 12 thus being formed in the upper part between the two half -chambres.Des turbulence promoters 13 are provided at the periphery of the exchanger to reduce the flow section of the primary water and facilitate spare parts. Similar promoters can also be placed along the central cylindrical core.

D'autres moyens propres à ameliorer les echanges thermiques peuvent aussi être envisagés, tels que des picots,nervures ou autres sur les tubes longitudinaux. Other means suitable for improving heat exchange can also be envisaged, such as pins, ribs or the like on the longitudinal tubes.

L'échangeur compact ainsi réalisé présente une perte de charge de l'eau primaire admissible et active car elle contribue a l'augmentation des echanges thermiques puisqu'elle est essentiellement causée par la faible épaisseur de passage de l'eau primaire entre les tubes 3. En effet, l'eau primaire émise par le conduit 8 heurte le disque obturateur 10 et se répartit dans la première demi-chambre < a gauche sur la figure 1), s'élève entre les tubes 3, passe dans l'autre demi-chambre (à droite sur la figure 1) et redescend, toujours entre les tubes 3, vers le conduit de sortie 9. Il n'y a donc pas de multiples changements brusques de direction et de section de passage sur le circuit d'eau primaire comme sur les échangeurs a coupelles empilées les unes sur les autres ou l'on provoque une perte de charge importante de l'eau primaire pour passer d'une coupelle à l'autre par les orifices de communication décalés sans contribuer à l'augmentation des echanges thermiques. The compact exchanger thus produced has an admissible and active primary water pressure drop as it contributes to the increase in heat exchange since it is essentially caused by the small thickness of the passage of primary water between the tubes 3 In fact, the primary water emitted by the conduit 8 strikes the obturator disc 10 and is distributed in the first half-chamber <on the left in FIG. 1), rises between the tubes 3, passes into the other half -bedroom (on the right in FIG. 1) and descends, still between the tubes 3, towards the outlet conduit 9. There are therefore no abrupt multiple changes of direction and of passage section on the water circuit primary as on the exchangers with cups stacked one on the other or one causes a significant pressure drop of the primary water to pass from a cup to the other by the offset communication orifices without contributing to the increase heat exchanges.

Claims (4)

REVENDICATIONS 1 / Echangeur compact a contre-courant pour production d'eau chaude sanitaire dans les chaudières de chauffage central constitué d'une enceinte cylindrique enveloppant un faisceau de tubes longitudinaux reliant un collecteur circulaire inferieur à un collecteur circulaire supérieur, ce faisceau etant parcouru par l'eau à chauffer circulant entre les deux collecteurs, caractérisé par le fait, que l'enceinte cylindrique est coupée en deux par une cloison diamétrale (11) laissant à la partie supérieure un passage (12 )entre les deux demi-chambres ainsi constituées, que l'eau primaire chaude est admise par un conduit(8)dans une première demi chambre et s'élève entre les tubes longitudinaux (3) parcourus eux-mêmes par l'eau secondaire à chauffer avant de redes cendre dans l'autre demi-chambre vers le conduit de sortie(9; et que des moyens sont prevus pour faciliter les échanges thermiques entre les deux fluides.CLAIMS 1 / Compact counter-current exchanger for producing domestic hot water in central heating boilers consisting of a cylindrical enclosure enveloping a bundle of longitudinal tubes connecting a lower circular collector to an upper circular collector, this beam being traversed by the water to be heated circulating between the two collectors, characterized in that the cylindrical enclosure is cut in half by a diametrical partition (11) leaving a passage (12) between the two half-chambers thus formed at the upper part , that the primary hot water is admitted through a conduit (8) into a first half-chamber and rises between the longitudinal tubes (3) themselves traversed by the secondary water to be heated before being ashed in the other half-chamber towards the outlet duct (9; and that means are provided to facilitate the heat exchanges between the two fluids. 20/ Echangeur selon la revendication 1 caractérisé par le fait20 / Exchanger according to claim 1 characterized in that que l'eau à chauffer pénètre dans le collecteur inférieur (1) the water to be heated enters the lower collector (1) par la tubulure (5) du côté de la demi-chambre oû s'effectue by the tubing (5) on the side of the half-chamber where la sortie de fluide primaire par le conduit(9) tandis qu'elle the primary fluid outlet through the conduit (9) while it ressort du collecteur inférieur par la tubulure (6) du côte spring of the lower manifold by the tubing (6) on the side de la demi-chambre ou s'effectue l'admission de fluide pri of the half-chamber where the pri fluid is admitted maire par le conduit (8). mayor through the conduit (8). 30/ Echangeur selon la revendication 1 caractérisé par le fait 30 / Exchanger according to claim 1 characterized in that qu'un moyen facilitant les echanges thermiques entre les deux that a means facilitating the heat exchanges between the two fluides est constitué d'un noyau cylindrique fermé (4) occu fluids consists of a closed cylindrical core (4) occu pant la partie centrale de l'echangeur, sur lequel s'applique pant the central part of the exchanger, to which applies les deux parties de la cloison diamétrale (11). the two parts of the diametrical partition (11). 40/ Echangeur selon les revendications 1 et-3 caractérisB.par le40 / Exchanger according to claims 1 and -3 characterized by the fait que le noyau (4). est en appui contre le plateau collecteu fact that the core (4). is resting against the collecting plate superieur (2) et est ferme à sa partie inférieur par un upper (2) and is closed at its lower part by a disque obturateur (10) à proximité duquel débouchent les condu obturator disc (10) near which the conduits open d'admission (8) et de sortie(9)d'eau primaire.  primary water inlet (8) and outlet (9). S/ Echangeur selon la revendication 1 caractérisé par le fait S / Exchanger according to claim 1 characterized in that qu'un moyen facilitant les échanges thermiques entre les that a means facilitating the heat exchanges between the deux fluides est constitue de promoteurs de turbulence (13) two fluids is made up of turbulence promoters (13) prévus a la périphérie de l'échangeur. provided at the periphery of the exchanger. 60/ Echangeur selon les revendications 1 et 3 caractérisé par le60 / Exchanger according to claims 1 and 3 characterized by the fait que des moyens facilitant les échanges thermiques entre means that facilitate the heat exchanges between les deux fluides sont prévus sur le noyau cylindrique (4).  the two fluids are provided on the cylindrical core (4).
FR8105931A 1981-03-25 1981-03-25 Counter flow heat exchanger for central heating boiler - has casing with pipe bundles connecting collecting headers Granted FR2502764A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8105931A FR2502764A1 (en) 1981-03-25 1981-03-25 Counter flow heat exchanger for central heating boiler - has casing with pipe bundles connecting collecting headers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8105931A FR2502764A1 (en) 1981-03-25 1981-03-25 Counter flow heat exchanger for central heating boiler - has casing with pipe bundles connecting collecting headers

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FR2502764A1 true FR2502764A1 (en) 1982-10-01
FR2502764B3 FR2502764B3 (en) 1984-07-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584609A1 (en) * 1985-07-12 1987-01-16 Hospal Ind Method for heat exchange between blood and a heat-exchange fluid and heat exchanger making use thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2584609A1 (en) * 1985-07-12 1987-01-16 Hospal Ind Method for heat exchange between blood and a heat-exchange fluid and heat exchanger making use thereof

Also Published As

Publication number Publication date
FR2502764B3 (en) 1984-07-27

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