US3481394A - Configuration of heat transfer tubing for vapor condensation on its outer surface - Google Patents
Configuration of heat transfer tubing for vapor condensation on its outer surface Download PDFInfo
- Publication number
- US3481394A US3481394A US648662A US3481394DA US3481394A US 3481394 A US3481394 A US 3481394A US 648662 A US648662 A US 648662A US 3481394D A US3481394D A US 3481394DA US 3481394 A US3481394 A US 3481394A
- Authority
- US
- United States
- Prior art keywords
- tube
- fins
- external
- helical
- fin
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- 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
- F28F1/36—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 the means being helically wound fins or wire spirals
-
- 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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular 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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular 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
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
- Y10T29/49382—Helically finned
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
- Y10T29/49384—Internally finned
Definitions
- FIGURE 5 is a view similar to FIGURE 4 illustrating another method and apparatus for forming the tubing.
- the present invention relates particularly to improved configurations of tubing for the transfer of heat as required for condensation of vapor on the external surface of fluid cooled tubes.
- An example of such heat transfer application is that of steam condensing on watercooled tubes.
- Further examples might involve: vapor heating of viscous process fluids; or, in the case of cascade refrigeration, refrigerant vapor condensing on the external surface of tubing, with a second refrigerant being boiled as it flows through the tubing.
- the prior Rodgers patent emphasized the importance of the ratio S/H in which S is the axial spacing between adjacent convolutions of the internal rib, and H is the radial height of the internal tab, on the internal heat trans fer performance.
- the disclosure is of an arrangement in which the number and axial spacing between external fins and internal fins is identical. This results from the fact that the internal ribs are produced by a rolling operation displacing material from external grooves into the external fin configuration.
- tubes are formed which have an external multiple-start fin configuration consisting of a plurality of helically disposed continuous fins, the fins being arranged in the manner of a multiple-start screw so that in the case of a two-start fin for example, adjacent convolutions of fins throughout the length of the tube are portions of different fins.
- an external fin configuration comprising a multiplicity of interleaved separate external continuous helical fins
- one of this multiplicity of grooves is deepened by an operation in which the material of the tube is displaced inwardly to produce a single continuous internal helical rib which accordingly extends opposite to and matches the external helical groove which was deepened to form the internal rib.
- the single internal rib will have a pitch or axial spacing between adjacent convolutions equal to twice the pitch or axial spacing between adjacent convolutions of the external fin.
- the axial spacing or pitch between adjacent convolutions of the internal rib will be n times" as great as the pitch or axial spacing between adjacent convolu tions of the external fins.
- FIGURE 1 there is shown a fragmentary section of a tube having two starts producing two continuous helical fins one of which is designated at 12 and the other at 14. This results in the corresponding formation of two separate helical grooves 16 and 18.
- the groove 16 is allowed to remain in the condition existing after material has been displaced therefrom by rolling to form the adjacent fins 12 and 14.
- the remaining helical groove 18 is illustrated as having been deepened so as to produce an internally helically extending rib 19. It will be apparent by inspection that the axial spacing Si between adjacent convolutions of the internal rib is substantially double the pitch or axial spacing Se between adjacent fin convolutions at the exterior of the tube.
- the ribs and fins may if desired, be provided to extend straight around the tube so as to be circular or annular in shape.
- FIGURE 2 there is shown a modified tube 20 having a three-start fin construction providing external fins 21, 22 and 23.
- this external arrangement will provide internal helical grooves 24, 25 and 26.
- this arrangement only one of the grooves; namely, the groove 26, is deepened as illustrated as to provide the internal helically extending rib 27. Accordingly, the axial spac ing Si between adjacent rib convolutions in this case will be three times the axial spacing of the external fins.
- FIGURE 3 there is illustrated a tube 30 similar to the tubes previously described except that the fins here generally designated at 32, are the result of a six-start arrangement so that if one of the groves, as for example the groove 34, is deepened, it produces an internal rib 36 having a pitch or axial spacing Si which is six times as great as the axial spacing Se between adjacent fin convolutions.
- FIG. URES 13 where the fin and rib configuration is helical
- method and apparatus best illustrated in FIGURE 4 may be employed.
- the tube here designated T
- the tube is advanced over a cylindrical mandrel 40 adapted to support the internal surface of the tube and to maintain it substantially smooth during the fin rolling operation.
- a plurality of fin forming rolls indicated generally at 42, only one of which is illustrated.
- the fin forming rolls comprise an arbor 44 on which a plurality of discs 46 are provided, the discs having a constant axial spacing and being shaped to be rolled into the material of the tubing to produce helical fins 48 and intermediate helical grooves 50.
- the arbor shafts are disposed at the appropriate angle to the axis of the arbor and tube so that each of the discs forms a separate helical groove 50.
- the fins produced by the apparatus illustrated in FIGURE 4 is a six-start helical fin providing a corresponding number of helical grooves 50.
- one of the discs 52 is substantially larger than the remaining discs 46 and is located beyond the end of the mandrel 40 so that the material of the tube opposite the rib forming disc 52 is unsupported.
- the smaller discs 46 form the fins 48 and the shallow grooves 50
- the disc 52 forms the relatively deeper groove 54 and cooperates in the formation of the fins 48 at both sides thereof.
- the disc 52 is required to form the relatively deep groove 54 in its entirety.
- an additional small disc 46 could be provided at the left of the discs illustrated in the figure so that the function of the disc 52 would be merely to deepen a groove 50 previously formed by one of the small discs 46.
- FIGURE 5 there is illustrated apparatus for performing a somewhat different fin and rib forming operation on tubing.
- a rolling tool generally designated is provided comprising an arbor 62 on which a plurality of discs 64 are provided, the discs being uniformaly spaced by spacers 66.
- the arbor is positioned at an appropriate angle to the tube T so that each of the discs 64 forms a separate distinct helical groove 68, the fins being six in number and also separate and distinct.
- the number of starts which are produced by assembly of finning discs on the tool is determined by the angle at which the arbor is positioned with respect to the axis of the mandrel and tube T.
- the same tool could be employed to produce one, two, three, or six-start fin configurations.
- a separate roll 76 is provided which in this case is positioned with its axis parallel to the axis of the mandrel 72 and tube T.
- the roll 76 is provided with a helical rib 78 extending at a lead or helix angle determined by the lead or helix angle of the grooves 68 on the tube, and further by the relative diameters or circumferences of the tube and the roll or tool 76.
- the rib 78 engages in one of the previously formed grooves 68 and deepens it to the increased depth as indicated at 80, simultaneously producing the radially inwardly projecting helical rib 74.
- the pitch or axial spacing between adjacent convolutions of the rib 74 will be six times as great as the pitch or axial spacing between adjacent fin convolutions on the exterior of the tube.
- the present invention permits the design of the helical fin configuration on the exterior of the tube to be essen tially independent of the configuration of the internal helical rib. It has previously been indicated that this is desirable because the factors which dictate the most efficient dimensions, shapes, S/H ratios, etc. of the internal rib are quite different and independent from the factors which dictate the most desirable design of finned exterior. It may be mentioned at this time that one con slderation influencing the design of fins at the exterior of the tube is the promotion of drainage of condensate formed on the tube exterior.
- a metal heat exchange tube for vapor condensation on its exterior surface said tube having at its exterior surface a plurality of separate generally radially outwardly extending integral helical fins, each fin being formed of material displaced outwardly from material of the tube, said fins being arranged in a multiple start relationship such that adjacent fin convolutions are portions of different fins, separate continuous helical grooves intermediate said fins equal in number to the number of separate fins, the interior surface of said tube having a helically extending cylindrically formed zone occuping a cylinder extending longitudinally of said tube and in registration with at least one helically extending external groove and the two helically extending fins at the sides ofsuch groove, whereby the minimum wall thickness of said tube along said helically extending zone is determined by the spacing between the bottom of the helical groove and the cylindrically formed portion of the interior surface in registration therewith, said interior surface also having a generally radially inwardly extending integral helical rib formed of material displaced inwardly from material
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Forging (AREA)
- Automatic Assembly (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US64866267A | 1967-06-26 | 1967-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3481394A true US3481394A (en) | 1969-12-02 |
Family
ID=24601697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US648662A Expired - Lifetime US3481394A (en) | 1967-06-26 | 1967-06-26 | Configuration of heat transfer tubing for vapor condensation on its outer surface |
Country Status (10)
Country | Link |
---|---|
US (1) | US3481394A (fi) |
JP (1) | JPS4821542B1 (fi) |
BE (1) | BE709338A (fi) |
DE (1) | DE1751423A1 (fi) |
ES (1) | ES348936A1 (fi) |
FR (1) | FR1562938A (fi) |
GB (1) | GB1174640A (fi) |
IE (1) | IE32033B1 (fi) |
NL (1) | NL6800552A (fi) |
SE (1) | SE342081B (fi) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762468A (en) * | 1970-06-30 | 1973-10-02 | Atomic Energy Authority Uk | Heat transfer members |
US3826304A (en) * | 1967-10-11 | 1974-07-30 | Universal Oil Prod Co | Advantageous configuration of tubing for internal boiling |
US3847212A (en) * | 1973-07-05 | 1974-11-12 | Universal Oil Prod Co | Heat transfer tube having multiple internal ridges |
US4059147A (en) * | 1972-07-14 | 1977-11-22 | Universal Oil Products Company | Integral finned tube for submerged boiling applications having special O.D. and/or I.D. enhancement |
US4161214A (en) * | 1976-11-09 | 1979-07-17 | James L. Lowe | Laundry hot water supply coil assembly |
US4330036A (en) * | 1980-08-21 | 1982-05-18 | Kobe Steel, Ltd. | Construction of a heat transfer wall and heat transfer pipe and method of producing heat transfer pipe |
US4715436A (en) * | 1984-10-05 | 1987-12-29 | Hitachi, Ltd. | Construction of a heat transfer wall of a heat transfer pipe |
DE4420756C1 (de) * | 1994-06-15 | 1995-11-30 | Wieland Werke Ag | Mehrgängiges Rippenrohr und Verfahren zu dessen Herstellung |
US5839505A (en) * | 1996-07-26 | 1998-11-24 | Aaon, Inc. | Dimpled heat exchange tube |
US5992512A (en) * | 1996-03-21 | 1999-11-30 | The Furukawa Electric Co., Ltd. | Heat exchanger tube and method for manufacturing the same |
EP1113237A2 (de) | 1999-12-28 | 2001-07-04 | Wieland-Werke AG | Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung |
US6688378B2 (en) | 1998-12-04 | 2004-02-10 | Beckett Gas, Inc. | Heat exchanger tube with integral restricting and turbulating structure |
US20080029243A1 (en) * | 2003-11-25 | 2008-02-07 | O'donnell Michael J | Heat exchanger tube with integral restricting and turbulating structure |
US20110056653A1 (en) * | 2009-09-08 | 2011-03-10 | Krones Ag | Shell-and-Tube Heat Exchanger |
DE102017105254A1 (de) * | 2017-03-13 | 2018-09-13 | Schmöle GmbH | Verfahren zur Herstellung eines Rippenrohres und eines Wärmetauschers |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2187454B1 (fi) * | 1972-06-01 | 1976-08-13 | Ara Const Elect Icas | |
FR2193188B1 (fi) * | 1972-07-14 | 1976-09-17 | Universal Oil Prod Co | |
JPS5141942A (ja) * | 1974-10-07 | 1976-04-08 | Nippon Musical Instruments Mfg | Seigyokairo |
JPS5631066Y2 (fi) * | 1975-05-23 | 1981-07-24 | ||
JPS5272142A (en) * | 1975-12-12 | 1977-06-16 | Tamura Seisakusho Co Ltd | Limiting amplifier |
JPS5288546U (fi) * | 1975-12-25 | 1977-07-01 | ||
US4159739A (en) * | 1977-07-13 | 1979-07-03 | Carrier Corporation | Heat transfer surface and method of manufacture |
JPS5426341U (fi) * | 1977-07-26 | 1979-02-21 | ||
JPH018007Y2 (fi) * | 1980-07-10 | 1989-03-02 | ||
AU7757581A (en) * | 1980-11-19 | 1982-05-27 | United Energy Technologies Inc. | Enhanced surface tubing |
JPS57104229A (en) * | 1980-12-22 | 1982-06-29 | Agency Of Ind Science & Technol | Vapor phase growing method for znse compound |
FR2532043B1 (fr) * | 1982-08-23 | 1987-12-24 | Fonderie Soc Gen De | Condenseur tubulaire extrude |
EP0102407B1 (de) * | 1982-09-03 | 1986-02-19 | Wieland-Werke Ag | Rippenrohr mit inneren Vorsprüngen sowie Verfahren und Vorrichtung zu dessen Herstellung |
DE3643782A1 (de) * | 1986-12-20 | 1988-07-07 | Wieland Werke Ag | Kraftstoffkuehler |
DE10212491B4 (de) * | 2002-03-21 | 2005-06-02 | Wieland-Werke Ag | Rippenrohr mit inneren Vorsprüngen |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE540928A (fi) * | ||||
US2244800A (en) * | 1939-12-26 | 1941-06-10 | Pascale Miguel | Heat transfer tube |
US2463997A (en) * | 1944-06-19 | 1949-03-08 | Calumet And Hecla Cons Copper | Method of making integral external and internal finned tubing |
GB845574A (en) * | 1956-04-20 | 1960-08-24 | Jiri Schneller | Heat exchange elements |
US3174319A (en) * | 1962-01-05 | 1965-03-23 | Nihon Kentetsu Company Ltd | Method and apparatus for manufacturing integrally finned tubing |
US3213525A (en) * | 1961-02-10 | 1965-10-26 | Babcock & Wilcox Co | Method of forming an internal rib in the bore of a tube |
-
1967
- 1967-06-26 US US648662A patent/US3481394A/en not_active Expired - Lifetime
- 1967-12-05 GB GB55225/67A patent/GB1174640A/en not_active Expired
- 1967-12-06 IE IE1475/67A patent/IE32033B1/xx unknown
-
1968
- 1968-01-04 ES ES348936A patent/ES348936A1/es not_active Expired
- 1968-01-12 NL NL6800552A patent/NL6800552A/xx unknown
- 1968-01-12 BE BE709338D patent/BE709338A/xx unknown
- 1968-01-17 JP JP43002200A patent/JPS4821542B1/ja active Pending
- 1968-01-19 FR FR1562938D patent/FR1562938A/fr not_active Expired
- 1968-05-28 DE DE19681751423 patent/DE1751423A1/de active Pending
- 1968-06-26 SE SE861868A patent/SE342081B/xx unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE540928A (fi) * | ||||
US2244800A (en) * | 1939-12-26 | 1941-06-10 | Pascale Miguel | Heat transfer tube |
US2463997A (en) * | 1944-06-19 | 1949-03-08 | Calumet And Hecla Cons Copper | Method of making integral external and internal finned tubing |
GB845574A (en) * | 1956-04-20 | 1960-08-24 | Jiri Schneller | Heat exchange elements |
US3213525A (en) * | 1961-02-10 | 1965-10-26 | Babcock & Wilcox Co | Method of forming an internal rib in the bore of a tube |
US3174319A (en) * | 1962-01-05 | 1965-03-23 | Nihon Kentetsu Company Ltd | Method and apparatus for manufacturing integrally finned tubing |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3826304A (en) * | 1967-10-11 | 1974-07-30 | Universal Oil Prod Co | Advantageous configuration of tubing for internal boiling |
US3762468A (en) * | 1970-06-30 | 1973-10-02 | Atomic Energy Authority Uk | Heat transfer members |
US4059147A (en) * | 1972-07-14 | 1977-11-22 | Universal Oil Products Company | Integral finned tube for submerged boiling applications having special O.D. and/or I.D. enhancement |
US3847212A (en) * | 1973-07-05 | 1974-11-12 | Universal Oil Prod Co | Heat transfer tube having multiple internal ridges |
US4161214A (en) * | 1976-11-09 | 1979-07-17 | James L. Lowe | Laundry hot water supply coil assembly |
US4330036A (en) * | 1980-08-21 | 1982-05-18 | Kobe Steel, Ltd. | Construction of a heat transfer wall and heat transfer pipe and method of producing heat transfer pipe |
US4715436A (en) * | 1984-10-05 | 1987-12-29 | Hitachi, Ltd. | Construction of a heat transfer wall of a heat transfer pipe |
DE4420756C1 (de) * | 1994-06-15 | 1995-11-30 | Wieland Werke Ag | Mehrgängiges Rippenrohr und Verfahren zu dessen Herstellung |
EP0687880A1 (de) | 1994-06-15 | 1995-12-20 | Wieland-Werke Ag | Mehrgängiges Rippenrohr und Verfahren zu dessen Herstellung |
US5803164A (en) * | 1994-06-15 | 1998-09-08 | Wieland-Werke Ag | Multiple finned tube and a method for its manufacture |
US5992512A (en) * | 1996-03-21 | 1999-11-30 | The Furukawa Electric Co., Ltd. | Heat exchanger tube and method for manufacturing the same |
US5839505A (en) * | 1996-07-26 | 1998-11-24 | Aaon, Inc. | Dimpled heat exchange tube |
US6688378B2 (en) | 1998-12-04 | 2004-02-10 | Beckett Gas, Inc. | Heat exchanger tube with integral restricting and turbulating structure |
US7255155B2 (en) | 1998-12-04 | 2007-08-14 | Beckett Gas, Inc. | Heat exchanger tube with integral restricting and turbulating structure |
US20100258280A1 (en) * | 1998-12-04 | 2010-10-14 | O'donnell Michael J | Heat exchange tube with integral restricting and turbulating structure |
EP1113237A2 (de) | 1999-12-28 | 2001-07-04 | Wieland-Werke AG | Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung |
DE19963353A1 (de) * | 1999-12-28 | 2001-07-26 | Wieland Werke Ag | Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung |
US6488078B2 (en) | 1999-12-28 | 2002-12-03 | Wieland-Werke Ag | Heat-exchanger tube structured on both sides and a method for its manufacture |
DE19963353B4 (de) * | 1999-12-28 | 2004-05-27 | Wieland-Werke Ag | Beidseitig strukturiertes Wärmeaustauscherrohr und Verfahren zu dessen Herstellung |
US20080029243A1 (en) * | 2003-11-25 | 2008-02-07 | O'donnell Michael J | Heat exchanger tube with integral restricting and turbulating structure |
US8459342B2 (en) | 2003-11-25 | 2013-06-11 | Beckett Gas, Inc. | Heat exchanger tube with integral restricting and turbulating structure |
US20110056653A1 (en) * | 2009-09-08 | 2011-03-10 | Krones Ag | Shell-and-Tube Heat Exchanger |
DE102017105254A1 (de) * | 2017-03-13 | 2018-09-13 | Schmöle GmbH | Verfahren zur Herstellung eines Rippenrohres und eines Wärmetauschers |
Also Published As
Publication number | Publication date |
---|---|
SE342081B (fi) | 1972-01-24 |
ES348936A1 (es) | 1969-08-16 |
IE32033L (en) | 1968-12-26 |
NL6800552A (fi) | 1968-12-27 |
DE1751423A1 (de) | 1971-04-08 |
IE32033B1 (en) | 1973-03-21 |
GB1174640A (en) | 1969-12-17 |
BE709338A (fi) | 1968-07-12 |
FR1562938A (fi) | 1969-04-11 |
JPS4821542B1 (fi) | 1973-06-29 |
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Owner name: WOLVERINE ACQUISITION CORP., A DE CORP,DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WOLVERINE TUBE, INC.,;REEL/FRAME:004728/0083 Effective date: 19870318 Owner name: WOLVERINE ACQUISITION CORP., CORPORATION TRUST CEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WOLVERINE TUBE, INC.,;REEL/FRAME:004728/0083 Effective date: 19870318 |