EP0077575A1 - Echangeur de chaleur, en particulier radiateur de refroidissement pour transformateurs d'huile à courant triphasé - Google Patents
Echangeur de chaleur, en particulier radiateur de refroidissement pour transformateurs d'huile à courant triphasé Download PDFInfo
- Publication number
- EP0077575A1 EP0077575A1 EP82109737A EP82109737A EP0077575A1 EP 0077575 A1 EP0077575 A1 EP 0077575A1 EP 82109737 A EP82109737 A EP 82109737A EP 82109737 A EP82109737 A EP 82109737A EP 0077575 A1 EP0077575 A1 EP 0077575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiator
- knobs
- oil
- sheets
- radiator according
- 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- Withdrawn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
Images
Classifications
-
- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
- F28D1/0316—Assemblies of conduits in parallel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
Definitions
- the invention relates to a radiator for the dissipation of heat to its surroundings, in particular to a cooling radiator for oil-filled three-phase transformers with a plurality of radiator members arranged in parallel, which are connected to one another at the top and bottom by collecting channels.
- Radiators are often attached to oil-filled three-phase transformers, in which the oil heated by the transformer is cooled and sinks in the process.
- the cooled oil returns to the transformer housing via the lower collecting duct.
- the circulation movement is thereby mostly maintained solely by the difference in density between warm and cold oil.
- the radiator members have several parallel vertical channels. More heat is dissipated at the channels near the edge, so that the oil cools down more quickly and therefore sinks faster.
- the specific cooling capacity i.e. the cooling capacity, based on the heat-emitting surface of the radiator, is unsatisfactory, since the heat output in the central area of the radiator is low.
- the invention has for its object to provide a radiator of the type mentioned in such a way that the heat output, based on the area of the radiator members, is increased.
- radiator members consist of parallel, essentially flat sheets, at least one of which has studs distributed over its surface and formed from the sheet, which are welded to the other sheet.
- the oil to be cooled is distributed much better than in radiators whose members have vertical channels. Because of the only point-by-point connection of the two sheets to one another, currents transverse to the vertical direction are also possible at any height range of the radiator.
- the oil that sinks faster in the outer area of the radiator exerts a suction force on oil located further inside kung, so that warm oil is drawn from the less well-cooled central area of the radiator to the outer area. This significantly improves the overall cooling effect.
- the radiator according to the invention is not only advantageous for use on three-phase transformers, but also wherever the transport forces for the medium to be cooled are low, in particular wherever gravity is used alone and where the radiator members have a large structural depth ( Width).
- the radiator members can be assembled from a flat sheet and a sheet provided with knobs.
- the knobs are arranged according to claim 4 in a square pattern.
- the stud spacing can be relatively large, approximately as specified in claim 5.
- the sheets are fixed to one another at greater intervals by the studs welded to one another.
- Advantageous nub diameters are specified in claim 6.
- the distance between the sheets can be small. Suitable dimensions for this are given in claim 7.
- a small distance between the sheets has the advantage part that the heat from the oil or other heat transfer medium can be quickly dissipated to the outside.
- the construction according to the invention is particularly advantageous for wide radiator members. Suitable widths are specified in claim 8. Generally, the radiator members will be approximately rectangular in shape, although the invention is not so limited.
- Two cooling radiators R are attached to a three-phase transformer T.
- Each of these cooling radiators has an upper header 1 and a lower header 2.
- Plates 3 arranged in parallel are connected to the header.
- the plates 3 are hollow and their cavities communicate with the manifolds 1, 2.
- the flow connection between the manifolds 1, 2 and the Raditor links 3 is only in the middle of the horizontal edges of the plates.
- Each of the plates 3 is composed of two identically designed sheets 4a and 4b.
- the sheets 4a and 4b have cranked portions 5 at their edges, so that an edge flange 6 is offset from the general plane 7 of the sheet.
- Knobs 8 are formed from the sheets 4a, 4b. In the exemplary embodiment shown, these knobs have the shape of a truncated cone.
- the flat end surface 8a of the knobs 8 is as far away from the general plate plane 7 as the edge flange 6 is from the general plate plane 7.
- the knobs 8 have a diameter dN of e.g. 12 mm.
- the pitch t between the knobs can e.g. 60 mm.
- the knobs are arranged according to a square pattern, so that there are vertical and horizontal rows of knobs.
- the two embossed sheets 4a and 4b are welded to one another in the area of their edge flanges and in the area of the knobbed bottoms 8a.
- the clear distance a between the two sheets 4a and 4b is relatively small, e.g. 6 mm.
- the radiator members 3 have a rectangular shape with the width b and the height h.
- the width b is relatively large, e.g. 500 mm.
- Oil heated in the transformer T rises according to the arrow 9 and reaches the upper manifold 1. From the manifold 1, the oil reaches the plates 3 and sinks there according to the arrows 10. The oil passes from the plates 3 into the lower manifold 2 and flows back into the transformer T in accordance with the arrow 11. This flow is maintained by the difference in density of the cooling oil.
- the oil heated in the transformer T is specifically relatively light and therefore rises upwards, while the oil cooled in the plates 3 is specifically heavier and therefore sinks downwards.
- the flow pattern within the plates 3 is indicated schematically in FIG. 2.
- the oil flows down over the entire cross section of the plate.
- the downward flow in areas 3a and 3b near the edge is somewhat faster, because most of the heat is dissipated to the environment there.
- This flow has a certain suction effect, which pulls oil outwards from the central area 3c of the plate, as is shown by the oblique dash-dotted lines, e.g. line 12 is indicated.
- the better cooling effect in the outer plate regions 3a, 3b is better utilized than in the case of radiators whose members have vertical channels.
- the oil flows back towards the center in order to be able to enter the lower collecting pipe 2.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3141719 | 1981-10-21 | ||
DE19813141719 DE3141719A1 (de) | 1981-10-21 | 1981-10-21 | Radiator fuer die abgabe von waerme an seine umgebung,insbesondere kuehlradiator fuer oelgefuellte drehstromtransformatoren |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0077575A1 true EP0077575A1 (fr) | 1983-04-27 |
Family
ID=6144542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82109737A Withdrawn EP0077575A1 (fr) | 1981-10-21 | 1982-10-21 | Echangeur de chaleur, en particulier radiateur de refroidissement pour transformateurs d'huile à courant triphasé |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0077575A1 (fr) |
DE (1) | DE3141719A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013112339A3 (fr) * | 2012-01-23 | 2013-11-07 | Abb Technology Ag | Réservoir de transformateur à déviation de fluide |
WO2018161614A1 (fr) * | 2017-03-06 | 2018-09-13 | 常熟市友邦散热器有限责任公司 | Radiateur à ailettes doté d'un canal d'huile de forme spéciale |
EP4312238A1 (fr) * | 2022-07-26 | 2024-01-31 | TTP Technologies Private Limited | Elément de dissipation de chaleur pour radiateur et son procédé de fabrication |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL80883C (fr) * | ||||
US1838722A (en) * | 1928-12-17 | 1931-12-29 | Charles G Watson | Radiator for transformer casings |
FR2080190A5 (fr) * | 1970-02-26 | 1971-11-12 | Rosenblad Corp | |
DE2250222A1 (de) * | 1971-10-15 | 1973-04-19 | Union Carbide Corp | Waermetauscher |
FR2204788A1 (en) * | 1972-10-30 | 1974-05-24 | Tranter Mfg Inc | Plate heat exchanger unit - made from two flat plates spot welded together in rhombus pattern |
DE2330273A1 (de) * | 1973-06-14 | 1975-01-09 | Transformatoren Union Ag | Waermetauscher zur rueckkuehlung der kuehlfluessigkeit von transformatoren und drosseln |
FR2411383A1 (fr) * | 1977-12-08 | 1979-07-06 | Menk Apparatebau Gmbh | Radiateur de refroidissement pour transformateurs a huile |
-
1981
- 1981-10-21 DE DE19813141719 patent/DE3141719A1/de not_active Withdrawn
-
1982
- 1982-10-21 EP EP82109737A patent/EP0077575A1/fr not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL80883C (fr) * | ||||
US1838722A (en) * | 1928-12-17 | 1931-12-29 | Charles G Watson | Radiator for transformer casings |
FR2080190A5 (fr) * | 1970-02-26 | 1971-11-12 | Rosenblad Corp | |
DE2250222A1 (de) * | 1971-10-15 | 1973-04-19 | Union Carbide Corp | Waermetauscher |
FR2204788A1 (en) * | 1972-10-30 | 1974-05-24 | Tranter Mfg Inc | Plate heat exchanger unit - made from two flat plates spot welded together in rhombus pattern |
DE2330273A1 (de) * | 1973-06-14 | 1975-01-09 | Transformatoren Union Ag | Waermetauscher zur rueckkuehlung der kuehlfluessigkeit von transformatoren und drosseln |
FR2411383A1 (fr) * | 1977-12-08 | 1979-07-06 | Menk Apparatebau Gmbh | Radiateur de refroidissement pour transformateurs a huile |
Non-Patent Citations (1)
Title |
---|
PATENTS ABSTRACT OF JAPAN, Band 4, Nr. 112(E21)(594), 12. August 1980, Seite 132E21 & JP - A - 55 71010 (TOKYO SHIBAURA DENKI) 28.05.1980 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013112339A3 (fr) * | 2012-01-23 | 2013-11-07 | Abb Technology Ag | Réservoir de transformateur à déviation de fluide |
US8779880B2 (en) | 2012-01-23 | 2014-07-15 | Abb Technology Ag | Fluid deflection transformer tank |
WO2018161614A1 (fr) * | 2017-03-06 | 2018-09-13 | 常熟市友邦散热器有限责任公司 | Radiateur à ailettes doté d'un canal d'huile de forme spéciale |
EP4312238A1 (fr) * | 2022-07-26 | 2024-01-31 | TTP Technologies Private Limited | Elément de dissipation de chaleur pour radiateur et son procédé de fabrication |
Also Published As
Publication number | Publication date |
---|---|
DE3141719A1 (de) | 1983-04-28 |
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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 |
Designated state(s): BE FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19831108 |
|
D17P | Request for examination filed (deleted) | ||
R17P | Request for examination filed (corrected) |
Effective date: 19831108 |
|
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: 19860408 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: REICHMANN, HANS HELMUT, ING. GRAD. |