FR2570173A1 - Heat exchanger, particularly for a condensation boiler - Google Patents
Heat exchanger, particularly for a condensation boiler Download PDFInfo
- Publication number
- FR2570173A1 FR2570173A1 FR8414044A FR8414044A FR2570173A1 FR 2570173 A1 FR2570173 A1 FR 2570173A1 FR 8414044 A FR8414044 A FR 8414044A FR 8414044 A FR8414044 A FR 8414044A FR 2570173 A1 FR2570173 A1 FR 2570173A1
- Authority
- FR
- France
- Prior art keywords
- boiler
- coils
- heat exchanger
- exchanger
- fumes
- 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
Links
- 238000009833 condensation Methods 0.000 title claims description 7
- 230000005494 condensation Effects 0.000 title claims description 7
- 239000012530 fluid Substances 0.000 claims abstract 2
- 239000003517 fume Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000003462 Bender reaction Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
- F28D21/0007—Water heaters
-
- 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
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
-
- 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
- F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
-
- 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
- F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—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 otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
La présente invention est relative à un échangeur thermique destine, notamment, à l'équipement d'une chaudière à condensation. The present invention relates to a heat exchanger intended, in particular, for equipping a condensing boiler.
On sait que ce type de chaudière comporte un échangeur auxiliaire, placé sur le trajet des fumées après leur passage au travers de l'échangeur principal pour en récupérer la majeure partie des calories et les transférer au circuit de chauffe. L'invention se propose de réaliser un échangeur thermique de ce type remarquable par son faible encombrement et sa facilite de réa.lisation. We know that this type of boiler includes an auxiliary exchanger, placed on the smoke path after their passage through the main exchanger to recover most of the calories and transfer them to the heating circuit. The invention proposes to produce a heat exchanger of this type remarkable for its small footprint and its ease of realization.
Un échangeur thermique conforme à la présente invention est essentiellement caractérisé en ce qu'il se compose d'une p.luralité de-serpentins plans identiques, au nombre de quatre, par exemple, montés selon une configuration dite en "échevaux" et alimentés par un distributeur unique dans lequel arrive l'eau de retour du circuit de chauffage. A heat exchanger according to the present invention is essentially characterized in that it consists of a p.lurality of identical flat coils, four in number, for example, mounted in a configuration known as "skeins" and supplied by a single distributor into which the return water from the heating circuit arrives.
Selon une caractéristique de cette invention, l'ensemble des serpentins montés en écheveaux est disposé dans une boite parallélépipédique qui canalise les fumées du haut vers le bas et qui comporte une conduite d'évacuation des condensats, placée à sa partie inférieure, ces condensats circulant dans le même sens que les fumées. According to a characteristic of this invention, the set of coils mounted in hanks is placed in a parallelepiped box which channels the fumes from top to bottom and which comprises a condensate evacuation pipe, placed at its lower part, these condensates circulating in the same direction as the fumes.
D'autres caractéristiques et avantages de cette invention ressortiront de la description faite ci-après en référence aux dessins annexés, qui en il.lustrent deux exemples de réalisation non limitatifs. Sur les dessins
- la figure 1 est une vue de face de l'échangeur thermique objet de cette invention
- la figure 2 est une vue schématique, de profil et en coupe verticale d'une
chaudière munie de l'échangeur thermique représenté sur la figure 1
- les figures 3 et 4 sont des vues respectivement similaires aux figures 1
et 2, relatives à un second mode de réalisation de l'invention.Other characteristics and advantages of this invention will emerge from the description given below with reference to the appended drawings, which in themselves illustrate two nonlimiting exemplary embodiments. On the drawings
- Figure 1 is a front view of the heat exchanger object of this invention
- Figure 2 is a schematic view, in profile and in vertical section of a
boiler fitted with the heat exchanger shown in Figure 1
- Figures 3 and 4 are views respectively similar to Figures 1
and 2, relating to a second embodiment of the invention.
Dans l'exemple de réalisation de l'invention représenté sur les figures 1 et 2, .I'échangeur thermique se compose de quatre serpentins plans identiques 10 (ce nombre n'étant pas limitatif bien entendu), montés, comme on le voit sur les figures, selon une configuration dite en "écheveaux, c'est-à-dire que les axes des différents tubes qui constituent les serpentins 10 sont décalés les uns par rapport aux autres. Les serpentins sont alimentés par un distributeur unique 12, par lequel arrive l'eau à réchauffer en provenance du retour du circuit de chauffage alimenté par la chaudière 14. In the embodiment of the invention shown in Figures 1 and 2, the heat exchanger consists of four identical flat coils 10 (this number is not limiting of course), mounted, as seen in the figures, according to a so-called "skein" configuration, that is to say that the axes of the different tubes which constitute the coils 10 are offset from one another. The coils are supplied by a single distributor 12, by which the water to be heated comes from the return of the heating circuit supplied by the boiler 14.
L'ensemble des serpentins 10 est positionné dans une boite parallélépipédique 16 comportant une évacuation 24 des condensats à sa partie inférieure, cette bofte canalisant les fumées du haut vers le bas. Les gaz brûlés, en provenance de la chaudière 14 et après avoir traversé l'échangeur principal (non représenté) dont est munie cette chaudière de façon connue, sont amenés dans la boite paralléléipédique 16, par l'intermédiaire du conduit 18, au travers duquel ils sont repoussés par l'extracteur 20. The set of coils 10 is positioned in a parallelepiped box 16 comprising a condensate discharge 24 at its lower part, this box channeling the fumes from the top to the bottom. The burnt gases, coming from the boiler 14 and after having passed through the main exchanger (not shown) with which this boiler is provided in a known manner, are brought into the parallelepedic box 16, via the conduit 18, through which they are pushed back by the extractor 20.
Les gaz brayés qui arrivent sur l'échangeur objet de l'invention, sont une température encore assez élevée et ils transmettent leurs dernières /notamment - - calories; par condensation, å l'eau qui circule dans les serpentins 10. L'eau qui arrive par le distributeur 12, en provenance du retour chauffage, est donc réchauffée dans les serpentins 10 et elle est ensuite dirigée vers l'échangeur principal de la chaudière 14, par l'intermédiaire de-la conduite 22. The cross-linked gases which arrive on the exchanger which is the subject of the invention are still a fairly high temperature and they transmit their latest / in particular - - calories; by condensation, to the water which circulates in the coils 10. The water which arrives by the distributor 12, coming from the heating return, is therefore reheated in the coils 10 and it is then directed towards the main exchanger of the boiler 14, via line 22.
Afin d'adapter l'échangeur thermique qui vient d'etre décrit, à différentes conditions d'utilisation (notamment: puissance, encombrement, pressions etc.) on peut envisager deux chemins de circulation des produits de combustion. In order to adapt the heat exchanger which has just been described, to different conditions of use (in particular: power, size, pressures, etc.) it is possible to envisage two paths for the circulation of combustion products.
Dans l'exemple de réalisation illustré par les figures 1 et 2, l'ensemble des serpentins 10 est disposé dans la boite 16 et l'échangeur n'est parcouru qu'une fois par les gaz de combustion en provenance de la chaudière 14 alors que dans l'exemple de réalisation représenté sur les figures 3 et 4, la cloison 26 de la boite 16' contenant les serpentins 10' est disposée de façon à séparer le faisceau de serpentins pour qu'une partie 28 des serpentins soit située dans le conduit d'évacuation 30 des fumées. In the embodiment illustrated in FIGS. 1 and 2, the set of coils 10 is placed in the box 16 and the exchanger is only passed through once by the combustion gases coming from the boiler 14 then that in the embodiment shown in Figures 3 and 4, the partition 26 of the box 16 'containing the coils 10' is arranged so as to separate the bundle of coils so that a portion 28 of the coils is located in the smoke evacuation duct 30.
Grace à l'invention, on réalise un échangeur thermique simple, compact, apportant une optimisation des échanges thermiques par condensation, un écour lement hydraulique qui facilite la protection contre la corrosion et une compatibilité des pertes de charges sur l'eau et les fumées avec des pressions disponibles sur une chaudière murale à gaz. Thanks to the invention, a simple, compact heat exchanger is produced, providing optimization of the heat exchanges by condensation, a hydraulic flow which facilitates protection against corrosion and compatibility of the pressure drops on water and fumes with available pressures on a wall-mounted gas boiler.
Parmi les avantages et effets techniques apportés par l'invention on peut citer en particulier
A- Une grande facilité de mise en oeuvre
La conception et la disposition particulières des serpentins maximise, dans l'encombrement considéré, le rayon de courbure des tubes de façon à faciliter leur cintrage. Among the technical advantages and effects provided by the invention, there may be mentioned in particular
A- A great ease of implementation
The particular design and arrangement of the coils maximizes, in the space considered, the radius of curvature of the tubes so as to facilitate their bending.
Le fait que tous les serpentins soient identiques permet d'envisager une mise en forme largement automatique sans outillage complexe et permet l'utilisation de cintreuses à commande numérique. The fact that all the coils are identical makes it possible to envisage a largely automatic shaping without complex tools and allows the use of benders with numerical control.
Les caractéristiques géométriques des serpentins (diamètres, rayon de courbure . . .) sont telles que cet échangeur peut être réalisé en différents métaux comme le cuivre, I'acier inoxydable ou l'aluminium. The geometrical characteristics of the coils (diameters, radius of curvature, etc.) are such that this exchanger can be made of different metals such as copper, stainless steel or aluminum.
Le soin particulier donné à l'étude des échanges thermiques assure à l'échangeur une bonne efficacité quel que soit le métal utilisé. The particular care given to the study of heat exchanges ensures good efficiency for the exchanger whatever the metal used.
B- Une optimisation des échanges thermiques
L'absence de toute ailette affaiblit au maximum la résistance thermique entre l'eau et les fumées et permet d'obtenir au voisinage de la totalité de la surface d'échange, un gradient de pressions partielles de vapeur d'eau important et donc de bénéficier d'excellents échanges en condensation.B- Optimization of heat exchanges
The absence of any fin weakens the thermal resistance between water and fumes as much as possible and makes it possible to obtain, in the vicinity of the entire exchange surface, a significant partial pressure gradient of water vapor and therefore of benefit from excellent condensation exchanges.
Malgré les faibles vitesses des fumées, le montage des serpentins en "écheveaux" accroit les turbulences et donne aux coefficients locaux d'échanges par convection des valeurs supérieures à celles obtenues en écoulement laminaire. Despite the low smoke velocities, mounting the coils in "skeins" increases the turbulence and gives the local coefficients of convection exchange values higher than those obtained in laminar flow.
L'écoulement des fumées dans le sens des condensats ainsi que les surfaces lisses des tubes, assurent une évacuation rapide. des condensats. The flow of smoke in the direction of the condensate as well as the smooth surfaces of the tubes, ensure rapid evacuation. condensates.
L'épaisseur du film d'eau sur les parois du tube, qui est toujours faible, ne gene pas les échanges thermiques et permet d'obtenir un mode d'apparition des condensats qui se rapproche de la condensation "en goutte". The thickness of the film of water on the walls of the tube, which is always small, does not interfere with the heat exchanges and makes it possible to obtain a mode of appearance of the condensates which approximates the "drop" condensation.
C- Une excellente résistance à la corrosion
Puisqu'aucune concentration locale de condensats dûs à des reséchages dans des angles morts ou le long des bords d'attaque, n'est à redouter dans l'écoulement (comme on l'observe pour des échangeurs à ailettes), la conception meme de cet échangeur est déjà une assurance pour sa résistance dans le temps aux phénomènes de corrosion.C- Excellent resistance to corrosion
Since no local concentration of condensate due to re-drying in blind spots or along the leading edges is to be feared in the flow (as observed for fin exchangers), the very design of this exchanger is already an insurance for its resistance over time to corrosion phenomena.
En particulier, l'espace entre les boucles des serpentins permet l'écoulement naturel des condensats vers le bas et réduit les enrichissements en produits corrosifs qui se produisent en des endroits qui voient les condensats stagner puis s'évaporer avant de recevoir une nouvelle goutte de condensats lors des cycles alternés chauffage-sanitaire. In particular, the space between the coil loops allows the natural flow of condensate downwards and reduces the enrichments in corrosive products which occur in places which see condensate stagnate then evaporate before receiving a new drop of condensates during alternating heating-sanitary cycles.
Parmi les applications de l'échangeur thermique objet de cette invention, on peut citer en particulier les chaudières à combustibles liquides ou gazeux dites à condensation. Among the applications of the heat exchanger which is the subject of this invention, mention may be made in particular of boilers for liquid or gaseous fuels known as condensation.
L'échangeur objet de cette invention peut s'appliquer, en particulier, à une chaudière à condensation du type objet du brevet français n" 83 17 647, déposé le 7 novembre 1983 par la présente titulaire, le faisceau de serpentins étant alors placé dans un canal étanche disposé dans la partie arrière de la chaudière, entre la sortie des fumées de la chaudière et l'évacuation de ces fumées vers l'atmosphère. The exchanger object of this invention can be applied, in particular, to a condensing boiler of the type object of French patent n "83 17 647, filed on November 7, 1983 by the present holder, the bundle of coils being then placed in a sealed channel arranged in the rear part of the boiler, between the outlet of the fumes from the boiler and the evacuation of these fumes to the atmosphere.
I1 demeure bien entendu que cette invention n'est pas limitée aux exemples de réalisation décrits et représentés ici, mais qu'elle en englobe toutes les variantes. I1 remains of course that this invention is not limited to the embodiments described and shown here, but that it encompasses all variants.
Claims (7)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8414044A FR2570173B1 (en) | 1984-09-13 | 1984-09-13 | HEAT EXCHANGER, ESPECIALLY FOR A CONDENSING BOILER |
| JP20417785A JPH0745965B2 (en) | 1984-09-13 | 1985-09-13 | Condensation boiler |
| KR1019850006704A KR940009070B1 (en) | 1984-09-13 | 1985-09-13 | Condensation boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8414044A FR2570173B1 (en) | 1984-09-13 | 1984-09-13 | HEAT EXCHANGER, ESPECIALLY FOR A CONDENSING BOILER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2570173A1 true FR2570173A1 (en) | 1986-03-14 |
| FR2570173B1 FR2570173B1 (en) | 1989-03-31 |
Family
ID=9307694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8414044A Expired FR2570173B1 (en) | 1984-09-13 | 1984-09-13 | HEAT EXCHANGER, ESPECIALLY FOR A CONDENSING BOILER |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0745965B2 (en) |
| KR (1) | KR940009070B1 (en) |
| FR (1) | FR2570173B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0306284A1 (en) * | 1987-09-02 | 1989-03-08 | Enby Products Ltd. | Heat exchanger coils |
| DE10222974A1 (en) * | 2002-05-23 | 2003-12-11 | Enginon Ag | Heat exchanger used as a steam superheating unit in a steam engine comprises fluid flow channels forming groups of looped/curved bands having bends with an axis of curvature running perpendicular to a hot gas stream |
| EP1897443A1 (en) * | 2006-09-11 | 2008-03-12 | Bongard (S.A.) | Bread baking oven |
| JP2012107824A (en) * | 2010-11-18 | 2012-06-07 | Furukawa Electric Co Ltd:The | Double pipe |
| US20120298342A1 (en) * | 2009-12-14 | 2012-11-29 | Weili Shen | Coil and heat exchanger with the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4556688B2 (en) * | 2005-02-04 | 2010-10-06 | パナソニック株式会社 | Hydrogen generator |
| JP2007225262A (en) * | 2006-02-27 | 2007-09-06 | Hitachi Housetec Co Ltd | Water heater |
| CN111750630A (en) * | 2020-07-11 | 2020-10-09 | 河南农业大学 | Hotair circulation and dehumidification device of curing barn |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1895720A (en) * | 1930-11-26 | 1933-01-31 | P H Ma Girl Foundry And Furnac | Boiler |
| NL7612508A (en) * | 1976-11-10 | 1978-05-12 | Veg Gasinstituut Nv | Gas heating operating system - uses heat exchanger cooling combustion gases below dew point and has reheating layout |
| DE2820826A1 (en) * | 1978-05-12 | 1979-11-15 | Schneider Kg Ask A | Furnace fire heat recovery system - has pipes passing across heat exchanger housing which tapers towards fume outlet |
| NL7907707A (en) * | 1979-10-18 | 1981-04-22 | Remeha Fabrieken Bv | Central heating boiler economiser - has finned tubes followed downstream by smooth tubes inside downward portion of flue duct |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214890U (en) * | 1975-07-18 | 1977-02-02 |
-
1984
- 1984-09-13 FR FR8414044A patent/FR2570173B1/en not_active Expired
-
1985
- 1985-09-13 KR KR1019850006704A patent/KR940009070B1/en active IP Right Grant
- 1985-09-13 JP JP20417785A patent/JPH0745965B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1895720A (en) * | 1930-11-26 | 1933-01-31 | P H Ma Girl Foundry And Furnac | Boiler |
| NL7612508A (en) * | 1976-11-10 | 1978-05-12 | Veg Gasinstituut Nv | Gas heating operating system - uses heat exchanger cooling combustion gases below dew point and has reheating layout |
| DE2820826A1 (en) * | 1978-05-12 | 1979-11-15 | Schneider Kg Ask A | Furnace fire heat recovery system - has pipes passing across heat exchanger housing which tapers towards fume outlet |
| NL7907707A (en) * | 1979-10-18 | 1981-04-22 | Remeha Fabrieken Bv | Central heating boiler economiser - has finned tubes followed downstream by smooth tubes inside downward portion of flue duct |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0306284A1 (en) * | 1987-09-02 | 1989-03-08 | Enby Products Ltd. | Heat exchanger coils |
| DE10222974A1 (en) * | 2002-05-23 | 2003-12-11 | Enginon Ag | Heat exchanger used as a steam superheating unit in a steam engine comprises fluid flow channels forming groups of looped/curved bands having bends with an axis of curvature running perpendicular to a hot gas stream |
| DE10222974B4 (en) * | 2002-05-23 | 2004-07-08 | Enginion Ag | Heat exchanger |
| EP1897443A1 (en) * | 2006-09-11 | 2008-03-12 | Bongard (S.A.) | Bread baking oven |
| US20120298342A1 (en) * | 2009-12-14 | 2012-11-29 | Weili Shen | Coil and heat exchanger with the same |
| US9234711B2 (en) * | 2009-12-14 | 2016-01-12 | Hangzhou Shenshi Energy Conservation Technology Co., Ltd. | Coil and heat exchanger with the same |
| JP2012107824A (en) * | 2010-11-18 | 2012-06-07 | Furukawa Electric Co Ltd:The | Double pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| KR860002687A (en) | 1986-04-28 |
| KR940009070B1 (en) | 1994-09-29 |
| JPS61180855A (en) | 1986-08-13 |
| JPH0745965B2 (en) | 1995-05-17 |
| FR2570173B1 (en) | 1989-03-31 |
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