FR2487060A2 - Heat exchanger for mixed gas boiler - has coil spaced from outer tube to reduce noise caused by localised boiling of water in serpentine coil - Google Patents
Heat exchanger for mixed gas boiler - has coil spaced from outer tube to reduce noise caused by localised boiling of water in serpentine coil Download PDFInfo
- Publication number
- FR2487060A2 FR2487060A2 FR8015786A FR8015786A FR2487060A2 FR 2487060 A2 FR2487060 A2 FR 2487060A2 FR 8015786 A FR8015786 A FR 8015786A FR 8015786 A FR8015786 A FR 8015786A FR 2487060 A2 FR2487060 A2 FR 2487060A2
- Authority
- FR
- France
- Prior art keywords
- coil
- outer tube
- tube
- tubes
- heat exchanger
- 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
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Classifications
-
- 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
- F24H1/526—Pipes in pipe heat exchangers for sanitary water
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- 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
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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
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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)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
L' invention a pour objet un échangeur de chaleur plus précisément destiné aux chaudières mixtes à gaz.The subject of the invention is a heat exchanger more specifically intended for mixed gas boilers.
Dans les chaudières mixtes à gaz réalisant simultanément ou séparément les deux fonctions de chauffage central à eau chaude et/ou de fourniture d'eau chaude à usage domestique, il est connu d'assurer dans un meme corps de chauffe les échanges de chaleur entre les gaz de combustion provenant d'un brûleur et un tube à ailettes dans lequel circule l'eau de chauffage, de même qu'entre ce tube et un échangeur tubulaire interne dans lequel circule l'eau de puisage.In mixed gas boilers performing simultaneously or separately the two functions of central heating with hot water and / or supply of hot water for domestic use, it is known to ensure in the same heating body the heat exchanges between the combustion gas from a burner and a finned tube in which the heating water circulates, as well as between this tube and an internal tubular exchanger in which circulates the drawing water.
Pour améliorer les échanges thermiques en augmentant les surfaces d'échange et les turbulences du fluide en circulation entre les tubes internes et le tube extérieur, l'échangeur selon le brevet principal consiste à utiliser, pour la circulation de fluide secondaire, un faisceau de petits tubes rectilignes raccordés en série et munis d'ondulations, disposes à l'intérieur d'un tube de plus grand diamètre dans lequel circule le fluide primaire, et à faire en sorte que les ondulations portées par deux sections de tubes rectilignes adjacents, soient orientées et positionnées les unes par rapport aux autres pour qu'il n'y ait pas imbrication entre les spires adjacentes et que les surfaces d'échange soient ainsi augmentées afin d'intensifier la convecticn de l'eau à l'intérieur du tube à ailettes.To improve heat exchange by increasing the exchange surfaces and the turbulence of the fluid in circulation between the internal tubes and the external tube, the exchanger according to the main patent consists in using, for the circulation of secondary fluid, a bundle of small rectilinear tubes connected in series and provided with corrugations, arranged inside a tube of larger diameter in which the primary fluid circulates, and ensuring that the corrugations carried by two sections of adjacent rectilinear tubes are oriented and positioned in relation to each other so that there is no overlap between the adjacent turns and that the exchange surfaces are thus increased in order to intensify the convection of the water inside the fin tube .
Toutefois ces ondulations peuvent être en contact contre la paroi interne du tube extérieur, ce qui perturbe dans cette zone la circulation de l'eau primaire, et provoque donc des bouillonnements localisés de l'eau qui sont source de bruits.However, these undulations can be in contact against the internal wall of the outer tube, which disturbs the circulation of primary water in this zone, and therefore causes localized bubbling of the water which is a source of noise.
L'invention a pour objet un dispositif particulier permettant d'éviter cet inconvénient qui consiste en un moyen annexe pour écarter la majotité des ondulations des tubes internes, à quelque distance du tube extérieur, ce moyen étant constitué d'un jeu de butées du genre d'un enroulement de fils rapportés de place en place sur le faisceau de tubes, ou étant constitué par un surdimensionnement - obtenu en fabrication - de certaines ondulations elles-n;emes. The subject of the invention is a particular device making it possible to avoid this drawback which consists of an additional means for spreading the majority of the corrugations of the internal tubes, at some distance from the external tube, this means consisting of a set of stops of the kind of a winding of wires added from place to place on the tube bundle, or consisting of an oversizing - obtained in manufacturing - of certain undulations themselves;
D'autres caractéristiques particulières et avantages de 1 'inven- tion ressortiront de la description qui va suivre d'exemples de réalisation en référence aux dessins annexés qui representent
Figure 1, une vue écorchée en perspective de l'échangeur ;
Figure 2, une vue partielle de la figure 1 montrant une variante de réalisation.Other particular characteristics and advantages of the invention will emerge from the following description of exemplary embodiments with reference to the appended drawings which represent
Figure 1, a cutaway perspective view of the exchanger;
Figure 2, a partial view of Figure 1 showing an alternative embodiment.
Le tube 1 sur lequel sont rapportées des ailettes non represen tées, constitue le tube externe dans lequel circule le fluide primaire du circuit de chauffage. A 1 'intérieur de celui-ci est disposé un faisceau de petits tubes rectilignes 2a, 2b, 2c...The tube 1 on which fins are not shown, constitutes the external tube in which the primary fluid of the heating circuit circulates. Inside it is a bundle of small straight tubes 2a, 2b, 2c ...
parallèles à l'axe de tube 1 et réunis en série par des sections coudées 3. Ces petits tubes forment un serpentin parcouru par le fluide secondaire (eau de puisage) pénétrant et sortant de l'echangeur par les embouts d'extrémité 4. Pour faciliter la realisation du serpentin, est prévu coaxialement au tube 1 un noyau rigide longitudinal de positionnement 5 enveloppé par les sections de tubes 2a, 2b ... qui se répartissent tangentiellement à la face cylindrique interne du tube 1. Pour faciliter la réalisation de l'échangeur et pour que les sections coudées 3 aient un rayon de courbure voisin de celui du tube 1, chaque petit tube rectiligne est en série avec un tube rectiligne qui lui est diamétralement opposé.parallel to the tube axis 1 and joined in series by bent sections 3. These small tubes form a coil traversed by the secondary fluid (drawing water) penetrating and leaving the exchanger by the end fittings 4. For facilitate the realization of the coil, is provided coaxially with the tube 1 a rigid longitudinal positioning core 5 enveloped by the tube sections 2a, 2b ... which are distributed tangentially to the internal cylindrical face of the tube 1. To facilitate the realization of the exchanger and so that the bent sections 3 have a radius of curvature close to that of the tube 1, each small straight tube is in series with a straight tube which is diametrically opposite to it.
Comme decrit dans le brevet principal, les sections de tube rectiligne 2a,2b, 2c, portent des ondulations extérieures s'étendant sensiblement transversalement par rapport à l'axe longitudinal du tube. Ces ondulations ne sont portées que par les parties rectilignes des tubes, à l'exclusion des sections coudes 3, qui sont de simples coudes tubulaires soudés aux sections rectilignes, ou qui sont obtenues par cambrage d'une zone non munie d'ondulations d'un tube rectiligne. Ces ondulations sont en outre inclinées par rapport à l'axe longitudinal. Comme le montrent les axes représentés, les inclinaisons de deux sections de tubes voisins 2a, et 2b, ou 2b et 2c, etc ... sont de sens opposé par rapport à l'axe longitudinal des tubes de telle sorte qu'il ne puisse y avoir d'imbrication entre les ondulations de deux spires adjacents. As described in the main patent, the straight tube sections 2a, 2b, 2c carry external corrugations extending substantially transverse to the longitudinal axis of the tube. These undulations are only carried by the straight parts of the tubes, with the exception of the elbow sections 3, which are simple tubular elbows welded to the straight sections, or which are obtained by bending an area not provided with undulations of a straight tube. These undulations are also inclined relative to the longitudinal axis. As shown by the axes shown, the inclinations of two sections of neighboring tubes 2a, and 2b, or 2b and 2c, etc. are in opposite directions with respect to the longitudinal axis of the tubes so that it cannot there is overlap between the undulations of two adjacent turns.
Pour éviter que la totalité de ces ondulations ne soit en contact avec la paroi interne du tube 1, ce qui perturbe dans cette zone la circulation de l'eau primaire, on utilise un moyen annexe qui maintient ces ondulations à l'écart dudit tube.To prevent all of these corrugations from being in contact with the internal wall of the tube 1, which disturbs the circulation of primary water in this zone, an auxiliary means is used which keeps these corrugations away from said tube.
Selon la représentation illustrée à la figure 1, ce moyen consiste en un surdimensionnement de certaines ondulations 6, qui seules sont en contact avec le tube 1, c'est-à-dire que les autres ondulations restent ainsi écartées du tube extérieur. On notera qu'entre deux tubes voisins, ces ondulations surdimensionnées sont decalées pour ne pas se trouver en appui les unes contre les autres et permettre l'imbrication des tubes. Ces ondulations 6 sont obtenues en fabrication au formage des tubes à la suite d'une modification du moule.According to the representation illustrated in FIG. 1, this means consists in oversizing certain undulations 6, which alone are in contact with the tube 1, that is to say that the other undulations thus remain spaced from the outer tube. It will be noted that between two neighboring tubes, these oversized undulations are offset so as not to be in abutment against each other and allow the tubes to nest. These corrugations 6 are obtained in manufacturing by forming tubes following a modification of the mold.
Selon la representation de la figure 2, le moyen consiste en un enroulement de fils 7 entourant de place en place le faisceau de tubes et constituant ainsi une serie de surépaisseurs qui maintiennent les ondulations écartées du tube 1. La mise en place de ces fils s'effectue après le regroupement en faisceau des tubes 2 préa låblement à l'introduction dans le tube 1.According to the representation of FIG. 2, the means consists of a winding of wires 7 surrounding from place to place the bundle of tubes and thus constituting a series of thickeners which keep the undulations separated from the tube 1. The positioning of these wires s 'after the bundling of the tubes 2 prior to introduction into the tube 1.
Ces dispositions évitent les stagnations localises d'eau qui provoquent des bruits de bouillonnement. These provisions avoid localized stagnation of water which causes boiling noises.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8015786A FR2487060A2 (en) | 1978-10-31 | 1980-07-17 | Heat exchanger for mixed gas boiler - has coil spaced from outer tube to reduce noise caused by localised boiling of water in serpentine coil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7830856A FR2440534A1 (en) | 1978-10-31 | 1978-10-31 | HEAT EXCHANGER FOR A COMBINED GAS BOILER |
FR8015786A FR2487060A2 (en) | 1978-10-31 | 1980-07-17 | Heat exchanger for mixed gas boiler - has coil spaced from outer tube to reduce noise caused by localised boiling of water in serpentine coil |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2487060A2 true FR2487060A2 (en) | 1982-01-22 |
FR2487060B2 FR2487060B2 (en) | 1983-12-09 |
Family
ID=26220824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8015786A Granted FR2487060A2 (en) | 1978-10-31 | 1980-07-17 | Heat exchanger for mixed gas boiler - has coil spaced from outer tube to reduce noise caused by localised boiling of water in serpentine coil |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2487060A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19624937A1 (en) * | 1996-06-22 | 1998-01-02 | Dickgreber Johannes | Heat exchanger |
-
1980
- 1980-07-17 FR FR8015786A patent/FR2487060A2/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19624937A1 (en) * | 1996-06-22 | 1998-01-02 | Dickgreber Johannes | Heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
FR2487060B2 (en) | 1983-12-09 |
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