FR2494829A3 - Coaxial fluid heat exchanger - has container with helicoidally waved pipes for liquid flowing in opposing directions - Google Patents
Coaxial fluid heat exchanger - has container with helicoidally waved pipes for liquid flowing in opposing directions Download PDFInfo
- Publication number
- FR2494829A3 FR2494829A3 FR8025028A FR8025028A FR2494829A3 FR 2494829 A3 FR2494829 A3 FR 2494829A3 FR 8025028 A FR8025028 A FR 8025028A FR 8025028 A FR8025028 A FR 8025028A FR 2494829 A3 FR2494829 A3 FR 2494829A3
- Authority
- FR
- France
- Prior art keywords
- tube
- heat exchanger
- helicoidally
- circuits
- tubes
- 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
- 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
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
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- 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
- F28D7/02—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 helically coiled
- F28D7/022—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 helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
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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
- F28F1/08—Tubular elements crimped or corrugated in longitudinal section
-
- 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
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- 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)
Abstract
Description
On sait que dans la technique des transferts de chaleur on désigne couramment sous le nom de échangeurs coaxiaux des appareils comprenant une enveloppe tubulaire à l'intérieur de laquelle sont disposés, parallèlement à l'axe de ladite enveloppe, un ou plusieurs tubes qui définissent ainsi deux circuits séparés pour la circulation, le plus souvent à contre-courant, des deux gaz ou liquides à mettre en contact. L'ensemble formé par l'enveloppe et le ou les tubes intérieurs est généralement enroulé en hélice ou en spirale afin de réaliser des serpentins susceptibles de fournir un rendement d'échange calorique élevé sous un encombrement particulièrement réduit. It is known that in the heat transfer technique is commonly designated by the name of coaxial exchangers devices comprising a tubular envelope inside which are arranged, parallel to the axis of said envelope, one or more tubes which thus define two separate circuits for circulation, usually against the current, of the two gases or liquids to be brought into contact. The assembly formed by the envelope and the inner tube or tubes is generally wound in a helix or a spiral in order to produce coils capable of providing a high caloric exchange efficiency in a particularly reduced space requirement.
Les perfectionnements qui font l'objet de la présente invention visent à permettre l'obtention d'échangeurs coaxiaux qui soient spécialement bien adaptés pour constituer des évaporateurs ou des échangeurs destinés aux pompes à chaleur et autres machines frigorifiques à faible puissance. The improvements which are the subject of the present invention are intended to enable coaxial exchangers to be obtained which are specially well suited for constituting evaporators or exchangers intended for heat pumps and other low-power refrigeration machines.
L'échangeur suivant l'invention est essentiellement remarquable en ce que que le ou les tubes disposés à l'intérieur de l'enveloppe présentent des ondulations obtenues par un moletage ou repoussage appliqué hélicoïda- lement sur I'extérieur desdits tubes, de façon à déformer aussi bien la paroi intérieure qu'extérieure de ceux-ci. The exchanger according to the invention is essentially remarkable in that the tube or tubes placed inside the envelope have undulations obtained by knurling or embossing applied helically on the outside of said tubes, so as to deform both the inner and outer wall thereof.
Les essais auxquels a procédé la Demanderesse ont démontré que le profil ondulé des tubes internes de ltéchangeur déterminait sur les fluides ou liquides qui circulent dans lesdits tubes comme dans l'espace interstitiel de l'enveloppe, des turbulences qui augmentent de manière étonnante le coefficient d'échange thermique et qui remplacent de manière particulièrement avantageuse, aussi bien sur le plan du rendement que sur celui du prix de revient, l'augmentation de surface jusqu'ici recherchée dans la technique, augmentation de surface qui est généralement obtenue en prévoyant des ailettes ou en créant des surfaces secondaires sur les tubes intérieurs. The tests carried out by the Applicant have demonstrated that the corrugated profile of the internal tubes of the exchanger determines, on the fluids or liquids which circulate in said tubes as in the interstitial space of the envelope, turbulences which surprisingly increase the coefficient d heat exchange and which replace in a particularly advantageous manner, both in terms of efficiency and in terms of cost price, the increase in surface area hitherto sought in the art, increase in surface area which is generally obtained by providing fins or by creating secondary surfaces on the inner tubes.
Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer
Fig. 1 est une vue en perspective d'un échangeur coaxial établi conformément à l'invention.The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing.
Fig. 1 is a perspective view of a coaxial exchanger established in accordance with the invention.
Fig. 2 en est une coupe à plus grande échelle montrant la section de l'une des spires de l'échangeur suivant fig. 1. Fig. 2 is a section on a larger scale showing the section of one of the turns of the exchanger according to FIG. 1.
Fig. 3 est une coupe longitudinale de l'une des extrémités de l'appareil. Fig. 3 is a longitudinal section through one of the ends of the device.
L'échangeur représenté en fig. 1 se présente extérieurement à la manière des appareils classiques et comprend un serpentin 1 à profil hélicoldal, pourvu de deux têtes de raccordement 2 et fixé à un support inférieur 3. The exchanger shown in fig. 1 is presented externally in the manner of conventional apparatuses and comprises a coil 1 with a helical profile, provided with two connection heads 2 and fixed to a lower support 3.
Comme illustré en fig. 2 et 3 le serpentin 1 est constitué par une enveloppe ou virole 4 à section circulaire, dont les parois extérieure et intérieure sont prévues lisses. A l'intérieur de cette enveloppe 4 sont disposés trois tubes 5 qui s'étendent parallèlement à l'axe de ladite enveloppe ; comme plus particulièrement visible en fig. 3, chaque tube 5 a subi, préalablement à son engagement dans l'enveloppe 4 et au cintrage de celle-ci, une opération de moletage opérée sur la paroi extérieure de façon à repousser le métal sans enlèvement de copeaux et à imprimer ainsi une sorte de rainure hélicoidale, laquelle détermine une série d'ondulations régulières sur les faces extérieure et intérieure du tube considéré.Ce moletage est avantageusement arreté à une courte distance de chacune des extrémités de chaque tube 5, afin de déterminer des embouts Sa à paroi lisse. As illustrated in fig. 2 and 3 the coil 1 is constituted by an envelope or ferrule 4 of circular section, the outer and inner walls of which are provided smooth. Inside this envelope 4 are arranged three tubes 5 which extend parallel to the axis of said envelope; as more particularly visible in fig. 3, each tube 5 has undergone, prior to its engagement in the casing 4 and the bending of the latter, a knurling operation carried out on the outer wall so as to repel the metal without removing chips and thus to print a sort of helical groove, which determines a series of regular undulations on the external and internal faces of the tube considered. This knurling is advantageously stopped at a short distance from each of the ends of each tube 5, in order to determine end caps Sa with smooth wall.
Ce sont ces embouts lisses Sa qui pénètrent à l'intérieur du manchon 6 qui constitue chaque tête 2. Ce manchon 6 comporte une tubulure latérale 7 orientée radialement par rapport à l'axe dudit manchon, ainsi qu'une entretoise transversale 8 disposée au-delà du débouché de la tubulure précitée. L'entretoise 8 est percée de trois ouvertures dans lesquelles sont engagés et brasés les embouts lisses Sa des tubes 5. It is these smooth ends Sa which penetrate inside the sleeve 6 which constitutes each head 2. This sleeve 6 comprises a lateral tube 7 oriented radially with respect to the axis of said sleeve, as well as a transverse spacer 8 disposed au- beyond the outlet of the aforementioned tubing. The spacer 8 is pierced with three openings in which the smooth ends Sa of the tubes 5 are engaged and brazed.
Au-delà de cette entretoise chaque tête 2 est préférablement munie d'une pièce de réduction 9.Beyond this spacer each head 2 is preferably provided with a reduction part 9.
Ainsi qu'on l'a indiqué plus haut, les essais ont démontré qu'un tel échangeur assurait un transfert thermique optimal, en dépit de la simplicité de la construction, et ce par suite des turbulences engendrées par les ondulations des tubes 5 aussi bien sur le fluide qui parcourt lesdits tubes que sur celui qui circule dans l'espace interstitiel ménagé par lesdits tubes dans l'enveloppe 4. Dans le cas d'une machine frigorifique telle qu'une pompe à chaleur, le liquide caloporteur (eau par exemple) sera introduit par la tubulure latérale 7 de la tête supérieure 2 si l'appareil est utilisé comme évaporateur, de la tête inférieure 2 s'il doit s'agir d'un condenseur ; ce liquide circule dans l'espace interstitiel précité, tandis que le circuit de fluide frigorigène en évaporation ou en condensation sera raccordé aux pièces de réduction 9 de façon à circuler à contre-courant à l'intérieur des tubes 5. As indicated above, tests have shown that such an exchanger ensures optimal heat transfer, despite the simplicity of construction, and this as a result of the turbulence caused by the corrugations of the tubes 5 as well on the fluid which traverses said tubes than on that which circulates in the interstitial space formed by said tubes in the casing 4. In the case of a refrigerating machine such as a heat pump, the heat transfer liquid (water for example ) will be introduced through the lateral tube 7 of the upper head 2 if the device is used as an evaporator, of the lower head 2 if it must be a condenser; this liquid circulates in the aforementioned interstitial space, while the evaporating or condensing refrigerant circuit will be connected to the reduction pieces 9 so as to flow against the current inside the tubes 5.
Il convient en outre d'observer que l'échangeur suivant l'invention peut être considéré comme réversible, en permettant d'inverseur le cycle de réfrigération et d'assurer périodiquement le dégivrage rapide de l'appareil. Cette caractéristique de réversibilité simplifie les installations qui incorporent un tel échangeur. It should also be observed that the exchanger according to the invention can be considered as reversible, by permitting reversing the refrigeration cycle and periodically ensuring rapid defrosting of the device. This reversibility characteristic simplifies installations which incorporate such an exchanger.
Les essais ont également démontré que l'échangeur suivant l'invention était apte à fonctionner avec de très faibles écarts de température, ce qui est particulièrement avantageux dans l'industrie des pompes à chaleur. The tests also demonstrated that the exchanger according to the invention was able to operate with very small temperature differences, which is particularly advantageous in the heat pump industry.
La perte de charge est remarquablement réduite.The pressure drop is remarkably reduced.
Il va de soi que l'enveloppe 4 peut renfermer un nombre quelconque de tubes intérieurs ondulés 5, le nombre de trois évoqué ci-dessus n'ayant été choisi que pour illustrer l'application de l'invention à un cas pratique et n'étant donc nullement limitatif. On notera encore qu'afin d'assurer une répartition optimale du fluide dans les différents tubes 5 il s'est révélé avantageux de prévoir dans la tête 2 servant à l'admission dudit fluide à travers la pièce 9 correspondante, un écran ou déflecteur transversal disposé à une très faible distance en amont des extrémités des tubes précités, tel que celui schématisé en 10 en fig. 3. It goes without saying that the casing 4 may contain any number of corrugated inner tubes 5, the number of three mentioned above having been chosen only to illustrate the application of the invention to a practical case and does not therefore being in no way limiting. It will also be noted that in order to ensure optimal distribution of the fluid in the various tubes 5, it has proved advantageous to provide in the head 2 serving for the admission of said fluid through the corresponding part 9, a screen or transverse deflector. disposed at a very small distance upstream from the ends of the aforementioned tubes, such as that shown schematically in 10 in FIG. 3.
Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents. It should moreover be understood that the above description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8025028A FR2494829A3 (en) | 1980-11-21 | 1980-11-21 | Coaxial fluid heat exchanger - has container with helicoidally waved pipes for liquid flowing in opposing directions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8025028A FR2494829A3 (en) | 1980-11-21 | 1980-11-21 | Coaxial fluid heat exchanger - has container with helicoidally waved pipes for liquid flowing in opposing directions |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2494829A3 true FR2494829A3 (en) | 1982-05-28 |
FR2494829B3 FR2494829B3 (en) | 1982-11-26 |
Family
ID=9248343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8025028A Granted FR2494829A3 (en) | 1980-11-21 | 1980-11-21 | Coaxial fluid heat exchanger - has container with helicoidally waved pipes for liquid flowing in opposing directions |
Country Status (1)
Country | Link |
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FR (1) | FR2494829A3 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0119606A2 (en) * | 1983-03-17 | 1984-09-26 | Hans Dr. Viessmann | Heat exchanger |
FR2561364A1 (en) * | 1984-03-13 | 1985-09-20 | Raif Spa | REFRIGERATION CIRCUIT FOR PACKAGING LIQUIDS USING A EVAPORATOR-EXCHANGER IN WHICH THE RESPECTIVE FLUIDS FLOW IN DIRECTIONS OPPOSED IN THE MANNER AS "CURRENT" |
FR2590357A1 (en) * | 1985-11-21 | 1987-05-22 | Telecommunications Sa | Cooling device with Joule-Thomson expansion and its application to photodetectors |
FR2648549A1 (en) * | 1989-06-14 | 1990-12-21 | Carnier Corp | Manifold for heat exchanger of the tube-in-tube type |
US5004047A (en) * | 1989-06-14 | 1991-04-02 | Carrier Corporation | Header for a tube-in-tube heat exchanger |
DE19624937A1 (en) * | 1996-06-22 | 1998-01-02 | Dickgreber Johannes | Heat exchanger |
ITRM20090614A1 (en) * | 2009-11-24 | 2011-05-25 | Fontecal S P A | CONDENSER HEAT EXCHANGER WITH DOUBLE PIPING FOR HEATING WATER AND / OR PRODUCTION OF DOMESTIC HOT WATER. |
WO2012078609A3 (en) * | 2010-12-06 | 2013-01-03 | Saudi Arabian Oil Company | Combined colling of lube/seal oil and sample coolers |
US20140262185A1 (en) * | 2013-03-15 | 2014-09-18 | Turbotedc Products, Inc. | Heat Exchanger Containing Multiple Tubes, and Method of Making and Using Same |
CN104848713A (en) * | 2015-06-05 | 2015-08-19 | 杭州沈氏节能科技股份有限公司 | Heat exchanger with multi-start helical fluted tube |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441270A (en) * | 1944-09-16 | 1948-05-11 | Peerless Of America | Refrigerating system and heat exchanger therefor |
-
1980
- 1980-11-21 FR FR8025028A patent/FR2494829A3/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441270A (en) * | 1944-09-16 | 1948-05-11 | Peerless Of America | Refrigerating system and heat exchanger therefor |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0119606A2 (en) * | 1983-03-17 | 1984-09-26 | Hans Dr. Viessmann | Heat exchanger |
EP0119606A3 (en) * | 1983-03-17 | 1985-03-13 | Hans Dr. Viessmann | Heat exchanger |
FR2561364A1 (en) * | 1984-03-13 | 1985-09-20 | Raif Spa | REFRIGERATION CIRCUIT FOR PACKAGING LIQUIDS USING A EVAPORATOR-EXCHANGER IN WHICH THE RESPECTIVE FLUIDS FLOW IN DIRECTIONS OPPOSED IN THE MANNER AS "CURRENT" |
FR2590357A1 (en) * | 1985-11-21 | 1987-05-22 | Telecommunications Sa | Cooling device with Joule-Thomson expansion and its application to photodetectors |
FR2648549A1 (en) * | 1989-06-14 | 1990-12-21 | Carnier Corp | Manifold for heat exchanger of the tube-in-tube type |
US5004047A (en) * | 1989-06-14 | 1991-04-02 | Carrier Corporation | Header for a tube-in-tube heat exchanger |
DE19624937A1 (en) * | 1996-06-22 | 1998-01-02 | Dickgreber Johannes | Heat exchanger |
WO2011064804A2 (en) | 2009-11-24 | 2011-06-03 | Fontecal S.P.A. | Double tubing condensation exchanger for heating water and/or for producing sanitary hot water |
ITRM20090614A1 (en) * | 2009-11-24 | 2011-05-25 | Fontecal S P A | CONDENSER HEAT EXCHANGER WITH DOUBLE PIPING FOR HEATING WATER AND / OR PRODUCTION OF DOMESTIC HOT WATER. |
WO2011064804A3 (en) * | 2009-11-24 | 2012-05-10 | Fontecal S.P.A. | Double tubing condensation exchanger for heating water and/or for producing sanitary hot water |
CN102713453A (en) * | 2009-11-24 | 2012-10-03 | 方泰克股份公司 | Double tubing condensation exchanger for heating water and/or for producing sanitary hot water |
CN102713453B (en) * | 2009-11-24 | 2015-05-27 | 方泰克股份公司 | Double tubing condensation exchanger for heating water and/or for producing sanitary hot water |
WO2012078609A3 (en) * | 2010-12-06 | 2013-01-03 | Saudi Arabian Oil Company | Combined colling of lube/seal oil and sample coolers |
US9052146B2 (en) | 2010-12-06 | 2015-06-09 | Saudi Arabian Oil Company | Combined cooling of lube/seal oil and sample coolers |
US20140262185A1 (en) * | 2013-03-15 | 2014-09-18 | Turbotedc Products, Inc. | Heat Exchanger Containing Multiple Tubes, and Method of Making and Using Same |
CN104848713A (en) * | 2015-06-05 | 2015-08-19 | 杭州沈氏节能科技股份有限公司 | Heat exchanger with multi-start helical fluted tube |
Also Published As
Publication number | Publication date |
---|---|
FR2494829B3 (en) | 1982-11-26 |
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