CH260710A - Heat exchanger. - Google Patents
Heat exchanger.Info
- Publication number
- CH260710A CH260710A CH260710DA CH260710A CH 260710 A CH260710 A CH 260710A CH 260710D A CH260710D A CH 260710DA CH 260710 A CH260710 A CH 260710A
- Authority
- CH
- Switzerland
- Prior art keywords
- tubes
- heat exchanger
- fluid
- fins
- tube
- Prior art date
Links
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
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/20—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being attachable to the element
-
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
-
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
- Y10S165/442—Conduits
- Y10S165/452—Conduits including fins
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Echangeur de chaleur. Cette invention a pour objet un échangeur de chaleur. Elle vise à fournir une disposition < l'ailettes sur des tubes, d'un échangeur de chaleur, assurant une meilleure transmission de chaleur et un écoulement avec faibles per tes de charge du fluide dans lequel sont bai gnés les tubes de l'échangeur de chaleur. On a déjà proposé de disposer des ailettes sur les tubes des échangeurs de chaleur.
Ces ailettes sont généralement des ailettes longitudinales dont le plan passe par l'axe de chaque tube de l'échangeur. Selon des dispositions égale ment connues, on fait circuler le fluide exté rieur perpendiculairement ou approximative ment perpendiculairement à l'axe des tubes parcourus par le fluide dit intérieur, l'échange de chaleur se produisant entre ledit fluide extérieur et le fluide intérieur.
L'échangeur de chaleur selon l'invention est du type comprenant des tubes parcourus intérieurement par un fluide pour échanger de la chaleur avec un fluide baignant exté rieurement ces tubes qui sont munis chacun de deux ailettes disposées le long de deux de leurs génératrices diamétralement opposées, les axes desdits tubes étant disposés transver salement à la direction du courant du fluide parcourant l'échangeur et baignant extérieu rement lesdits tubes.
Dans l'échangeur de chaleur, objet de l'in vention, les ailettes sont disposées approxima tivement tangentiellement à la section de cha cun des tubes. Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'échan geur de chaleur objet de l'invention. Ce des sin montre, en coupe axiale, plusieurs élé ments groupés pour former une partie d'échangeur de chaleur.
Chaque tube a est équipé de deux ailettes rectilignes, l'une antérieure c, l'autre posté rieure b, soudées à 180 l'une de l'autre sur la périphérie du tube et de direction approxima tivement tangentielle à la section du tube. Ainsi qu'on l'a représenté sur le dessin, le tube a est disposé de façon que les ailettes soient légèrement inclinées par rapport à la direction générale du courant du fluide exté rieur qui suit le sens de la flèche A; cette inclinaison pourrait être nulle, et les ailettes b, c se trouver, par conséquent, parallèles à la flèche A.
Avec la disposition ci-dessus décrite, la veine fluide A séparée par l'ailette antérieure c vient lécher le tube, comme il est indiqué par la flèche 73 et, au moment où, conformé ment aux théories aérodynamiques, elle de vrait commencer à décoller du tube a, elle se trouve à peu près à hauteur de l'ailette b qu'elle balaye dans le sens de la flèche C.
Sur l'autre face de l'ailette c, la veine fluide qui suit la flèche D balaye encore la surface du tube a, en suivant la flèche E, et est enfin recueillie par l'autre face de l'ai lette b suivant la flèche F. On voit qu'avec la disposition adoptée, la totalité de la surface du tube a et des ailettes c et b se trouve balayée par le courant du fluide extérieur, et par suite l'échange de cha leur est assuré de la manière optimum. D'une rangée à l'autre des tubes a dans l'échangeur de chaleur, les ailettes sont dis posées parallèlement, de façon similaire, ou encore pourraient être alternées.
Lorsque les tubes sont eux-mêmes disposés en quinconce, on a la disposition représentée sur le dessin et l'ailette postérieure b d'un tube vient pres que en regard de l'ailette antérieure c du tube postérieur. On réalise ainsi dans tout le vo lume de l'échangeur de chaleur des sortes de couloirs sinueux dans lesquels va circuler le fluide extérieur 9., en assurant la plus effi cace des transmissions de chaleur entre fluide extérieur et fluide intérieur parcourant les tubes a. On voit qu'il n'y a ainsi pratiquement au cune ombre aérodynamique .ou zone de re mous où des cendres ou escarbilles puissent s'accumuler.
Pour la même raison, tout ramo- nage devient efficace, ce qui contribue à maintenir l'efficacité de l'appareil.
Heat exchanger. This invention relates to a heat exchanger. It aims to provide an arrangement <the fins on the tubes, of a heat exchanger, ensuring better heat transmission and a flow with low pressure drops of the fluid in which the tubes of the heat exchanger are bathed. heat. It has already been proposed to place fins on the tubes of the heat exchangers.
These fins are generally longitudinal fins, the plane of which passes through the axis of each tube of the exchanger. According to also known arrangements, the external fluid is circulated perpendicularly or approximately perpendicular to the axis of the tubes traversed by the so-called internal fluid, the heat exchange occurring between said external fluid and the internal fluid.
The heat exchanger according to the invention is of the type comprising tubes internally traversed by a fluid in order to exchange heat with a fluid bathing on the outside these tubes which are each provided with two fins arranged along two of their diametrically opposed generators. , the axes of said tubes being arranged transversely to the direction of the flow of the fluid passing through the exchanger and bathing said tubes externally.
In the heat exchanger, object of the invention, the fins are disposed approximately tangentially to the cross section of each of the tubes. The appended drawing represents, by way of example, an embodiment of the heat exchanger which is the subject of the invention. This figure shows, in axial section, several elements grouped together to form a part of the heat exchanger.
Each tube a is equipped with two rectilinear fins, one anterior c, the other posterior b, welded 180 to each other on the periphery of the tube and of direction approximately tangential to the section of the tube. As shown in the drawing, the tube a is arranged so that the fins are slightly inclined with respect to the general direction of the flow of the external fluid which follows the direction of the arrow A; this inclination could be zero, and the fins b, c are therefore parallel to the arrow A.
With the arrangement described above, the fluid vein A separated by the anterior fin c comes to lick the tube, as indicated by the arrow 73 and, at the moment when, according to aerodynamic theories, it should start to take off of tube a, it is approximately at the height of fin b which it sweeps in the direction of arrow C.
On the other face of fin c, the fluid stream which follows arrow D still sweeps the surface of tube a, following arrow E, and is finally collected by the other face of fin b following arrow F. It can be seen that with the arrangement adopted, the entire surface of the tube a and of the fins c and b is swept by the current of the external fluid, and consequently the heat exchange is ensured in the manner optimum. From one row to the other of the tubes a in the heat exchanger, the fins are arranged in parallel, in a similar manner, or else could be alternated.
When the tubes are themselves staggered, there is the arrangement shown in the drawing and the posterior fin b of a tube comes almost opposite the anterior fin c of the posterior tube. In this way, throughout the volume of the heat exchanger, types of sinuous corridors are produced in which the external fluid 9 will circulate, while ensuring the most efficient heat transmission between the external fluid and the internal fluid flowing through the tubes a. It can be seen that there is thus practically no aerodynamic shadow. Or soft zone where ashes or cinders can accumulate.
For the same reason, any sweeping becomes efficient, which helps to maintain the efficiency of the apparatus.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR926454T | 1946-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH260710A true CH260710A (en) | 1949-03-31 |
Family
ID=9440565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH260710D CH260710A (en) | 1946-04-10 | 1947-03-28 | Heat exchanger. |
Country Status (4)
Country | Link |
---|---|
US (1) | US2578305A (en) |
CH (1) | CH260710A (en) |
DE (1) | DE825847C (en) |
FR (1) | FR926454A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE967425C (en) * | 1953-02-14 | 1957-11-07 | Heinrich Loss | Heating system |
US2906448A (en) * | 1954-10-28 | 1959-09-29 | W C Heraus G M B H | Roots type vacuum pumps |
DE1076931B (en) * | 1956-04-26 | 1960-03-03 | Otto Gerhard | Tubular heater |
NL101972C (en) * | 1958-11-25 | |||
US3262737A (en) * | 1962-01-25 | 1966-07-26 | Anderson Co | Movable seat back |
US3438436A (en) * | 1965-11-29 | 1969-04-15 | Tauno Koponen | Heat exchanger |
US3508508A (en) * | 1968-02-26 | 1970-04-28 | Olin Mathieson | Method of adapting finned tubing for joining |
US4226279A (en) * | 1978-08-15 | 1980-10-07 | Foster Wheeler Energy Corporation | Method of suppressing formation of heat exchange fluid particles into standing waves |
CN106433695A (en) * | 2016-10-24 | 2017-02-22 | 南京华电节能环保设备有限公司 | Straight fin for coke oven riser raw coke oven gas waste heat recycling heat taking device and heating device |
WO2018130798A1 (en) | 2017-01-12 | 2018-07-19 | Dyson Technology Limited | A hand held appliance |
GB2562276B (en) * | 2017-05-10 | 2021-04-28 | Dyson Technology Ltd | A heater |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2371144A (en) * | 1945-03-13 | bronander | ||
US2019913A (en) * | 1932-02-04 | 1935-11-05 | Guy F Kotrbaty | Heating device |
US2330065A (en) * | 1941-10-08 | 1943-09-21 | United Aircraft Corp | Fin construction |
US2400157A (en) * | 1943-09-11 | 1946-05-14 | United Aircraft Corp | Brazed cylinder muff |
-
1946
- 1946-04-10 FR FR926454D patent/FR926454A/en not_active Expired
-
1947
- 1947-03-28 CH CH260710D patent/CH260710A/en unknown
- 1947-06-03 US US752226A patent/US2578305A/en not_active Expired - Lifetime
-
1950
- 1950-07-07 DE DEH4451A patent/DE825847C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR926454A (en) | 1947-10-02 |
US2578305A (en) | 1951-12-11 |
DE825847C (en) | 1951-12-20 |
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