EP0044734A2 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- EP0044734A2 EP0044734A2 EP81303307A EP81303307A EP0044734A2 EP 0044734 A2 EP0044734 A2 EP 0044734A2 EP 81303307 A EP81303307 A EP 81303307A EP 81303307 A EP81303307 A EP 81303307A EP 0044734 A2 EP0044734 A2 EP 0044734A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubes
- elements
- heat exchanger
- rows
- transverse
- 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
Images
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
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- 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
- F28F1/32—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 having portions engaging further tubular elements
- F28F1/325—Fins with openings
Definitions
- a plurality of circular-section tubes 14 extend between tube plates 15 bounding the manifolds 11 to conduct the water or other fluid between the inlet and outlet and the tubes lie parallel to and spaced from one another.
- the tube plates 15 close off the spaces between the tubes 14 from the manifolds 11.
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)
Abstract
Description
- This invention relates to heat exchangers and particularly to heat exchangers of the kind having a plurality of parallel tubes enclosed within a shell and having an inlet and an outlet for passing fluid through the tubes. A plurality of fin elements extend across the tubes to form secondary heat exchange surfaces and another fluid is fed between the tubes to pass over the secondary surfaces.
- Heat exchangers of this kind have been disclosed in British Patents 717,613 and 1,544,927. In some cases the secondary surface fin elements have been formed with louvres or slits to improve the heat transfer characteristics of the heat exchanger.
- It has also been proposed in British Patent 818,589 to provide fin and tube heat exchangers in which the tubes pass through the fins and in the spaces between the tubes the fins are formed with pairs of flanges.
- It is an object of the invention to provide a heat exchanger of the kind described in which the heat exchange characteristics are enhanced.
- According to the invention a heat exchanger comprises a plurality of circular-section tubes parallel to and spaced from one another, a shell disposed around the tubes, an inlet and an outlet for passing fluid through the tubes, a plurality of secondary surface fin elements lying in parallel planes extending transverse to the tubes, and inlet and outlet means for feeding a further fluid through the spaces between the tubes and over the elements in a direction generally parallel thereto, the elements each being formed with openings between the tubes and the openings being flanked by tags extending transverse to the planes of the elements, the tubes being arranged with spacings between the tubes to achieve a substantially constant cross-section in the direction of flow of said further fluid. In an arrangement of tubes in which the tubes are in rows transverse to the direction of flow and the tubes of alternate rows are staggered by one half the pitch of the tubes in each row, the spacing of the tubes in each row from one another is greater than the spacing of the tubes in one row from the tubes in adjacent transverse rows. Preferably the spacing of tubes from one another in each row is twice the spacing of the tubes in each row from tubes in adjacent rows. In this way the velocity of said further fluid is kept relatively constant and acceleration and deceleration of the fluid is avoided with consequent reduction in pressure loss across the heat exchanger.
- Conveniently the tags lie generally parallel to the direction of flow of said further fluid over the elements and the tags are formed in pairs so that one tag lies to each side of said opening.
- Preferably, by the use of baffles, the further fluid is constrained to pass in a generally sinuous path through the space between the tubes and over the fin elements.
- Further features of the invention will appear from the following description of an embodiment of the invention given by way of example only and with reference to the drawings, in which:-
- Fig. 1 is a part sectional side elevation of a heat ezchanger.
- Fig. 2 is an elevation of a fin element of the heat ezchanger of Fig. 1.
- Fig. 3 is an enlarged view of part of the fin of Fig. 2, and
- Fig. 4 is a section on the line 4-4 in Fig. 3.
- Referring to the drawings and firstly to Fig. 1, a heat exchanger includes a
cylindrical shell 10 at the ends of which aremanifolds 11 including anoutlet pipe 12 and aninlet pipe 13 for fluid acting as a heat transfer medium; for example the fluid may be water. - A plurality of circular-
section tubes 14 extend betweentube plates 15 bounding themanifolds 11 to conduct the water or other fluid between the inlet and outlet and the tubes lie parallel to and spaced from one another. Thetube plates 15 close off the spaces between thetubes 14 from themanifolds 11. - A series of
intermediate baffles 17a to 17e are located between the manifolds at right angles to the tubes and spaced from one another. The baffles are spaced alternately from the upper and lower walls of theshell 10. - A plurality of secondary heat exchanger
fin elements 20 lie at right angles to and across thetubes 14 and are regularly spaced from one another in the direction of the tubes, the upper and lower edges of theelements 20 being spaced from the upper and lower walls of theshell 10. Inlet andoutlet pipes shell 10 at opposite ends thereof to admit heat exchange medium, for example oil, to the spaces around the tubes. The presence of thebaffles 17a to 17e and thefins 20 ensures that the flow path of the oil or other fluid is sinuous and generally parallel to the planes of theelements 20. The fluid flows first down from theinlet 21 over thefins 20, under thebaffle 17a, upwards over thefins 20 and over thebaffle 17b, and so on, until the fluid leaves the shell upwardly through theoutlet 22. - It will be seen, in particular from Fig. 2, that the
tubes 14 are arranged to lie in horizontal rows R in one direction, and in a direction at a right angle to said rows R the tubes are in vertical rows S. The rows R lie transverse to the general direction of flow F and the tubes in alternate rows R are staggered by one half the pitch of the tubes in the rows R. If, as seen in Figs. 2 and 3, the spacing of the tubes in the rows R is y, the spacing of each tube in a row R from the tubes in adjacent rows R is x and the relationship between x and y is such that x is less than y, and preferably of the order of y = 2x. Such a spacing ensures that the cross-sectional area of the flow of fluid around the tubes remains substantially constant and the velocity of the fluid is therefore substantially constant thereby avoiding acceleration and deceleration of the fluid. Accordingly pressure loss in the heat exchanger is kept low. - The
fins 20 are formed withopenings 25 and associatedtags 26 as seen in Figs. 3, 4 and 4. Openings are formed betweenadjacent tubes 14 in rows R and at the ends of rows R. Thetags 26 are formed in pairs out of bent over portions of thefin elements 20 and lie at right angles to the planes of the fins. Thetags 26 also lie generally parallel to the general direction of flow F and theopenings 25 are formed as rectangular openings by the action of forming the tags. - The
tags 26 and associatedopenings 25 provide edges to the fluid thereby reducing boundary layer thickness of fluid on the fins. High heat transfer rates can be achieved without undue pressure losses being created.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8024041 | 1980-07-23 | ||
GB8024041 | 1980-07-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0044734A2 true EP0044734A2 (en) | 1982-01-27 |
EP0044734A3 EP0044734A3 (en) | 1982-07-21 |
EP0044734B1 EP0044734B1 (en) | 1985-02-20 |
Family
ID=10514962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810303307 Expired EP0044734B1 (en) | 1980-07-23 | 1981-07-20 | Heat exchanger |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0044734B1 (en) |
DE (1) | DE3169039D1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2499232A1 (en) * | 1981-02-05 | 1982-08-06 | Hutogepgyar | RADIATOR WITH TUBULAR BEAM AND FINS FOR STATIONARY OR MOTOR VEHICLE ENGINES |
FR2542860A1 (en) * | 1983-01-28 | 1984-09-21 | Ex Cell O Corp | HEAT EXCHANGER WITH ENVELOPED TUBULAR BEAM AND METHOD FOR ASSEMBLING SAID EXCHANGER |
NL1012029C2 (en) * | 1999-05-11 | 2000-11-14 | Bloksma B V | Heat exchanger. |
DE10333463A1 (en) * | 2003-07-22 | 2005-02-17 | Alstom Power Energy Recovery Gmbh | Tube heat exchanger |
CN101957150A (en) * | 2010-10-12 | 2011-01-26 | 岳阳市中达机电有限公司 | High-efficiency oil cooler |
WO2020015777A1 (en) * | 2018-07-19 | 2020-01-23 | Kelvion Machine Cooling Systems Gmbh | Heat exchanger |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB717613A (en) * | 1952-03-12 | 1954-10-27 | Serck Radiators Ltd | Heat exchangers |
GB818589A (en) * | 1955-02-09 | 1959-08-19 | Chausson Usines Sa | Improvements in or relating to a cooling radiator for motor vehicles |
GB1313973A (en) * | 1971-05-07 | 1973-04-18 | Hutogepgyar | Tubular heat exchanger and a method for the production thereof |
DE2306562A1 (en) * | 1973-02-10 | 1974-08-15 | Volkswagenwerk Ag | HEAT EXCHANGER |
DE2530064A1 (en) * | 1975-07-05 | 1977-01-27 | Volkswagenwerk Ag | Light alloy air plate for vehicle radiator - has spacers to separate adjacent plates set at angle to air flow direction |
FR2346660A1 (en) * | 1976-03-31 | 1977-10-28 | Volkswagenwerk Ag | TUBULAR EXCHANGER |
GB1544927A (en) * | 1975-12-19 | 1979-04-25 | Borg Warner | Finned tube bundle heat exchanger |
-
1981
- 1981-07-20 EP EP19810303307 patent/EP0044734B1/en not_active Expired
- 1981-07-20 DE DE8181303307T patent/DE3169039D1/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB717613A (en) * | 1952-03-12 | 1954-10-27 | Serck Radiators Ltd | Heat exchangers |
GB818589A (en) * | 1955-02-09 | 1959-08-19 | Chausson Usines Sa | Improvements in or relating to a cooling radiator for motor vehicles |
GB1313973A (en) * | 1971-05-07 | 1973-04-18 | Hutogepgyar | Tubular heat exchanger and a method for the production thereof |
DE2306562A1 (en) * | 1973-02-10 | 1974-08-15 | Volkswagenwerk Ag | HEAT EXCHANGER |
DE2530064A1 (en) * | 1975-07-05 | 1977-01-27 | Volkswagenwerk Ag | Light alloy air plate for vehicle radiator - has spacers to separate adjacent plates set at angle to air flow direction |
GB1544927A (en) * | 1975-12-19 | 1979-04-25 | Borg Warner | Finned tube bundle heat exchanger |
FR2346660A1 (en) * | 1976-03-31 | 1977-10-28 | Volkswagenwerk Ag | TUBULAR EXCHANGER |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2499232A1 (en) * | 1981-02-05 | 1982-08-06 | Hutogepgyar | RADIATOR WITH TUBULAR BEAM AND FINS FOR STATIONARY OR MOTOR VEHICLE ENGINES |
FR2542860A1 (en) * | 1983-01-28 | 1984-09-21 | Ex Cell O Corp | HEAT EXCHANGER WITH ENVELOPED TUBULAR BEAM AND METHOD FOR ASSEMBLING SAID EXCHANGER |
NL1012029C2 (en) * | 1999-05-11 | 2000-11-14 | Bloksma B V | Heat exchanger. |
WO2000068629A1 (en) * | 1999-05-11 | 2000-11-16 | Bloksma B.V. | Heat exchanger |
DE10333463A1 (en) * | 2003-07-22 | 2005-02-17 | Alstom Power Energy Recovery Gmbh | Tube heat exchanger |
DE10333463B4 (en) * | 2003-07-22 | 2006-05-04 | Alstom Power Energy Recovery Gmbh | Tube heat exchanger |
DE10333463C5 (en) * | 2003-07-22 | 2014-04-24 | Alstom Technology Ltd. | Tube heat exchanger |
CN101957150A (en) * | 2010-10-12 | 2011-01-26 | 岳阳市中达机电有限公司 | High-efficiency oil cooler |
WO2020015777A1 (en) * | 2018-07-19 | 2020-01-23 | Kelvion Machine Cooling Systems Gmbh | Heat exchanger |
CN112313467A (en) * | 2018-07-19 | 2021-02-02 | 凯尔维翁机械冷却系统有限公司 | Heat exchanger |
US11262139B2 (en) | 2018-07-19 | 2022-03-01 | Kelvion Machine Cooling Systems Gmbh | Heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
DE3169039D1 (en) | 1985-03-28 |
EP0044734B1 (en) | 1985-02-20 |
EP0044734A3 (en) | 1982-07-21 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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