EP1457752A1 - Echangeur de chaleur à tubes ailettes et flux croisé - Google Patents
Echangeur de chaleur à tubes ailettes et flux croisé Download PDFInfo
- Publication number
- EP1457752A1 EP1457752A1 EP04002280A EP04002280A EP1457752A1 EP 1457752 A1 EP1457752 A1 EP 1457752A1 EP 04002280 A EP04002280 A EP 04002280A EP 04002280 A EP04002280 A EP 04002280A EP 1457752 A1 EP1457752 A1 EP 1457752A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fins
- tubes
- heat exchanger
- flow
- finned
- 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.)
- Withdrawn
Links
- 238000009423 ventilation Methods 0.000 claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- 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
- the present invention refers to a finned-tube cross-flow heat exchanger comprised of a plurality of tubes extending parallel to each other, and a plurality of external fins that extend substantially parallel to the tubes transversally thereto.
- the fins are provided with a plurality of generally collar-shaped apertures, which are passed across by the tubes and are in a heat-conducting contact therewith.
- Heat exchangers of such kind are made through the use of tubes, which may for instance be made of copper, and fins that are usually formed by aluminium foils with a thickness of as low as 0.1 mm.
- a first fluid flow such as for instance water or water mixtures or a coolant medium
- a second fluid flow which may for instance be a forced air flow, is circulated through the fins in a transverse direction with respect to the tubes themselves.
- slits are effective in creating a number of continuous and repeated interruptions in the boundary layer of the air flow, thereby converting it into a turbulent flow, in order to boost the heat-exchange effect between the two fluids inside the heat exchanger.
- This aim is reached in a heat exchanger as defined in the appended claims.
- the heat exchanger comprises a surface formed by fins 10, which may for instance be constituted by a thin aluminium plate, or aluminium foil, having a thickness of approximately 0.1 mm.
- This surface is provided with a plurality of circular apertures provided with a collar for the heat-exchanger tubes to pass therethrough in a state of heat conduction. Only six of such apertures, as indicated by the reference numerals 11, 12, 13, 14, 15 and 16, are represented in Figure 1.
- the arrangement of these apertures further indicates that, in a fully conventional manner, the tubes within the heat exchanger are arranged in rows and ranks. The rows are arranged in the flow direction F of the second fluid in the heat exchanger, whereas the ranks are arranged perpendicularly to said flow direction F.
- each fin 10 is provided with a plurality of ventilation slits, which are obtained by cutting out the plate forming the fin 10 and bending the cutout portion with respect to the plane of the same plate, as this has already been noted hereinbefore, with the use of such techniques and tools as largely known to those skilled in the art.
- the ventilation slits of each group situated between two adjacent tubes are subdivided into an even or odd number of sub-groups, each such sub-group being formed by an again even or odd number of ventilation slits.
- reference numerals have only been used in the Figures to indicate those ventilation slits that are shown to be comprised between the two adjacent apertures 11 and 12, relating to the same rank of tubes.
- the reference numeral 20 is used to generally indicate the group of ventilation slits that are situated between the two adjacent apertures for the tubes 11 and 12, whereas the reference numerals 211, 212, 213 and 214 are used to indicate the four slits that form said group (see Figure 2).
- the various sub-groups 20 of ventilation slits turn therefore out as lying spaced from each other in a side-by-side arrangement in the direction in which said second fluid is caused to flow.
- all above-mentioned ventilation slits are equally sized in both their width and length, i.e. have the same width and length, as measured on the drawing plane of Figure 2. These geometrical characteristics contribute to facilitating production of the fins and, as a result, of the entire heat exchanger.
- the tubes forming a heat exchanger according to the present invention may be arranged according to any spatial configuration, and may be further be made of copper or any other similar or suitable material.
- the fins arranged transversally with respect to the tubes may be of aluminium or any other similar or suitable material.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITPN20030007 ITPN20030007U1 (it) | 2003-03-11 | 2003-03-11 | Scambiatore di calore a flussi incrociati a pacco alettato. |
| ITPN20030007U | 2003-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1457752A1 true EP1457752A1 (fr) | 2004-09-15 |
Family
ID=32750515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04002280A Withdrawn EP1457752A1 (fr) | 2003-03-11 | 2004-02-03 | Echangeur de chaleur à tubes ailettes et flux croisé |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1457752A1 (fr) |
| IT (1) | ITPN20030007U1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550776A (en) * | 1983-05-24 | 1985-11-05 | Lu James W B | Inclined radially louvered fin heat exchanger |
| JPS616591A (ja) * | 1984-06-19 | 1986-01-13 | Matsushita Refrig Co | フイン付熱交換器 |
| JPS62147290A (ja) * | 1985-12-20 | 1987-07-01 | Fujitsu General Ltd | 熱交換器 |
| JPS62194194A (ja) * | 1986-02-20 | 1987-08-26 | Fujitsu General Ltd | 熱交換器 |
| US4691767A (en) * | 1984-09-04 | 1987-09-08 | Matsushita Electric Industrial Co., Ltd. | Heat exchanger |
-
2003
- 2003-03-11 IT ITPN20030007 patent/ITPN20030007U1/it unknown
-
2004
- 2004-02-03 EP EP04002280A patent/EP1457752A1/fr not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4550776A (en) * | 1983-05-24 | 1985-11-05 | Lu James W B | Inclined radially louvered fin heat exchanger |
| JPS616591A (ja) * | 1984-06-19 | 1986-01-13 | Matsushita Refrig Co | フイン付熱交換器 |
| US4691767A (en) * | 1984-09-04 | 1987-09-08 | Matsushita Electric Industrial Co., Ltd. | Heat exchanger |
| JPS62147290A (ja) * | 1985-12-20 | 1987-07-01 | Fujitsu General Ltd | 熱交換器 |
| JPS62194194A (ja) * | 1986-02-20 | 1987-08-26 | Fujitsu General Ltd | 熱交換器 |
Also Published As
| Publication number | Publication date |
|---|---|
| ITPN20030007U1 (it) | 2004-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
| AKX | Designation fees paid | ||
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20050316 |