EP2394126A1 - Wärmeübertrager, insbesondere heizkörper für kraftfahrzeuge - Google Patents
Wärmeübertrager, insbesondere heizkörper für kraftfahrzeugeInfo
- Publication number
- EP2394126A1 EP2394126A1 EP10701881A EP10701881A EP2394126A1 EP 2394126 A1 EP2394126 A1 EP 2394126A1 EP 10701881 A EP10701881 A EP 10701881A EP 10701881 A EP10701881 A EP 10701881A EP 2394126 A1 EP2394126 A1 EP 2394126A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- range
- heat exchanger
- exchanger according
- vortex generators
- flat
- 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
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
- F28F1/126—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 consisting of zig-zag shaped fins
-
- 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
- F28D1/0391—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 a single plate being bent to form one or more conduits
-
- 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
- F28D1/04—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 tubular conduits
- F28D1/053—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 tubular conduits the conduits being straight
- F28D1/0535—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 tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
- F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
- F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
-
- 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
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F2001/027—Tubular elements of cross-section which is non-circular with dimples
Definitions
- Heat exchangers in particular radiators for motor vehicles
- the invention relates to a heat exchanger, in particular a Schukör »per for motor vehicles according to the preamble of claim 1.
- EP 0 710 811 B1 has disclosed a heat exchanger which is used as a radiator of an air conditioning system for motor vehicles.
- the known radiator has a built-up of flat tubes and corrugated fins block and an inlet side and an outlet side header box for the inlet and outlet of thedemitteis a cooling circuit of an internal combustion engine.
- the flat tubes of the radiator are flowed through in only one direction by the coolant. Thus, there is neither a deflection of the coolant in the width nor in the depth instead.
- the radiator is optimized so that at low coolant flow rate through the radiator, eg.
- the flat tubes of the radiator block have a clear width of 0.6 to 1.2 mm and the welirips between the Ffachrohren a height of 3 to 6 mm this corresponds to a ratio of corrugated fin height to clear tube width of 5.0.
- the known heat exchangers often have a low power to weight, d. H. the weight of the heat exchanger is relatively high, based on its performance. This results from the fact that higher performance with more weight is bought: Increases z. For example, if the number of tubes (reduction of the transverse distribution) of the heat exchanger is higher due to the larger heat-dissipating surface, the heat exchanger becomes heavier at the same time. An increase in the depth of the heat exchanger also has an unfavorable effect on the power-to-weight ratio.
- the heat exchanger should also be inexpensive and reliable to manufacture.
- the object of the invention thus also aims at a reduction of the fuel consumption of the motor vehicle (reduction of the recorded blower and coolant pump performance).
- the flat tubes have a clear width L in the range from 0.9 to 1.2 mm, preferably 1.0 mm, and the corrugated ribs have a height H in the range from 6.3 to 8.0 mm, preferably from 6 , 3 mm.
- the ratio of corrugated fin height H to clear width L is in a range of 5 to 9, in particular in a range of 6.3 to 7.2.
- the flat tubes have vortex generators projecting inwards into the flow cross-section of the flat tubes, which are elongated and arranged in a V-shape in rows transversely to the flow direction of the coolant.
- the vortex generators are optimized in terms of their dimensions (length, width, depth), their number and their Anstellwinkeis KOhlmilteiströmung in view of the cooling medium side pressure drop and heat transfer.
- Flg. 2 a corrugated rib with gills, seen from above,
- FIG. 3 shows a corrugated rib, seen from the front (in Luffströmungscardi), Fig. 4 shows a cross section through a folded Fiachrohr,
- Fig. 5 shows a cross section through a folded flat tube with embossed
- FIG. 6 shows a longitudinal section through a flat tube with vortex generators
- Fig. 8 is a graphic representation of the influence of the depth W of
- Fig. 10 is a graph showing the influence of the clearance L on the ratio of power to air side pressure drop
- Fig. 11 is a graph showing the influence of the clearance L on the power weight (specific power)
- Fig. 12 in a graphic representation of the influence of the corrugated fin height
- FIG. 1 shows a heat exchanger designed as a heating element 1, which comprises a block 4 constructed from flat tubes 2 and corrugated fins 3, as well as an inlet-side collecting box 5 and an outlet-side collecting box 6.
- the radiator 1 is part of an unillustrated heating or air conditioning system of a motor vehicle and is flowed through by coolant of a not showndenikiaufes the internal combustion engine of the motor vehicle disposed between the flat tubes 2 corrugated fins 3 (see also Fig, 2, 3) are covered by ambient air , which is supplied after heating in the radiator 1 a vehicle interior of the motor vehicle.
- Fig. 1a shows the radiator 1 in a perspective view, from which it can be seen that the radiator 1 is formed in a single row, ie only a row of flat tubes 2 has.
- the collecting tanks 5, 6 have no partitions,
- the components 2, 3, 5, 6 of the radiator 1 are made of aluminum materials and are soldered together. The construction and manufacture of the radiator 1 are thus relatively simple, in order to achieve a high degree of efficiency and productivity Reduce costs. Due to the simple coolant-side flow through the radiator, ie waiving deflections in width and in depth results in a relatively low coolant-side pressure drop.
- Fig. 2 shows a corrugated fin 3 in a view from above, in which differently employed gills 3a, 3b can be seen.
- Fig. 3 shows the corrugated fin 3 in a view from the, d. H. seen in the direction of air flow.
- the corrugated fin 3 has ribbed bows 3c, 3d, to which it is soldered to the flat tubes 2, not shown here.
- the height of the corrugated fin 3, which corresponds to the distance between adjacent flat tubes 2, is marked H.
- Fig. 4 shows a flat tube 2 in cross-section, wherein the flat sides are marked 2a, 2b.
- the flat tube 2 is formed as a folding tube, d. H. It is made from a sheet by forming and has in its center on a two webs 2c, 2d existing fold 2e.
- the flow cross-section of the flat tube 2 is thus subdivided into two chambers A1, A2.
- the outer dimension of the flat tube in the depth direction also referred to as depth, is denoted by T; the clear width of the flat tube 2 is denoted by L.
- FIG. 5 shows a cross-section of the flat tube 2 with swirl generators 7, 8 embossed inward in the flow cross-section on both flat sides 2a, 2b.
- the vortex generators 7, 8 have a depth W, which is indicated by dimension arrows and, in a preferred embodiment, is in a range of W - 0.16 to 0.35 mm.
- F ⁇ g. 6 shows a section of the flat tube 2 in longitudinal section, wherein rows of vortex generators 7 are drawn.
- the direction of flow of Coolant is indicated by arrows S; a Q ⁇ eritessebene, perpendicular to the flow direction S, is indicated by a line q.
- the number of vortex generators in a row is denoted by WA, wherein in the illustrated embodiment six Wirbeierzeuger are arranged per row.
- FIG. 7 shows a detail of the Fiachrohres 2 with a plan view of the vortex generators 7, which are arranged in relation to the Strömu ⁇ gsrichtting S V-shaped and have an angle of attack ⁇ with respect to the flow direction S.
- the vortex generators 7 are elongated: they have a longitudinal axis a, a length W1 and a width W2.
- the angle ⁇ is defined by ⁇ ⁇ e longitudinal axis a and the flow direction S.
- the following dimensions are provided for the vortex generators 7, 8: the depth W (see FIG.
- Range of 1, 5 to 4.0 mm, and the width W2 is in a range of 1, 0 to 2.5 mm.
- the number WA of the buckets 7, 8 per row and transverse to the flow direction S is 4 to 10.
- the angle of attack ⁇ of the Wrrbelerzeu- ger 7, 8 is in a range of 15 to 25 °.
- FIG. 8 shows a graph in which a specific power of the heat exchanger, ie the power Q 100, based on the coolant-side pressure drop dpi, is plotted in percent over the depth W of the vortex generators.
- the vortex generators serve to improve the heat transfer by forming a turbulence flow, whereby the power is increased.
- the coolant-side pressure drop dpi increases, from one At a depth of W ⁇ 0.25 mm, the performance increases only insignificantly despite a greater pressure drop.
- the range W 0.15 to 0.35 mm is considered the preferred range for a favorable ratio of Q100 / dp1.
- the measurement on which the diagram is based was carried out with a flat tube with a clear width of L-1, 0 mm.
- Fig. 9 shows a diagram in which a specific power, i. H. the power Q100, expressed as a percentage of the air-side pressure drop dp2, is plotted against the depth W of the vortex generators.
- the air-side pressure drop dp2 is virtually unaffected by the vortex generators, since the vortex generators are directed towards the inside of the flat tube, i. H. are impressed in the flow cross-section of the coolant.
- the ratio Q100 / dp2 increases with increasing depth W. However, the preferred range of the depth W of the vortex generators is determined by the ratio Q1007dp1 as shown in FIG.
- Flg. 11 shows a diagram in which the specific power, d, h. the power relative to the weight of the radiator is plotted in percent over the clear width L of the flat tube. Again, there are three curves for different corrugated heights of 4.5; 6.3; 8.0 mm shown.
- the characteristic Q100 / weight expresses the effectiveness of the heat exchanger, whereby the effectiveness also affects the cost of the heat exchanger. The lower the weight the less material is consumed, the Materiaitcosten the radiator amount to more than 50% of the total cost.
- Fig. 12 shows a diagram in which a further specific power is plotted against the height H of the welirips.
- the specific power is related to the product of the coolant side and the air side pressure drop and is designated Q100 / (dp1 • dp2).
- the diagram shows a family of curves of six curves for different clearances L of 0.8 to 1.3 mm, in each case for Welirippen stoodn of 4.5; 6.3; 8.0 mm shown.
- the ratio Q100 / (dp1 • dp2) increases with increasing light width. The main reason for this is the decreasing coolant-side pressure drop, which is more noticeable in this characteristic than the sinking power.
- the curves of the diagram initially show - in the range of corrugated rib height of 4.5 to 6.3 mm - a sharp increase, while the ratio Q100 / (dp1 • dp2) thereafter no longer increases.
- the radiator according to the invention has a high power to weight, which is associated with a lower material usage and lower material costs.
- the radiator according to the invention has a high efficiency. Due to the low air-side pressure drop results in a low Gebläseieistung, thus a lower power consumption, resulting in saving fuel costs. Due to the low cooling-side pressure drop results in a lower power consumption of the coolant pump in the coolant circuit and thus a higher power of the internal combustion engine.
- the rib density ie the number of ribs per dm (decimeter - 10 cm), is in a range of 85 to 105 ribs / dm.
- the material thickness of the flat tubes lies in a range of SR ear - 0.15 to 0.3 mm, especially at 0.20 mm.
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)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009007619A DE102009007619A1 (de) | 2009-02-05 | 2009-02-05 | Wärmeübertrager, insbesondere Heizkörper für Kraftfahrzeuge |
PCT/EP2010/051232 WO2010089287A1 (de) | 2009-02-05 | 2010-02-02 | Wärmeübertrager, insbesondere heizkörper für kraftfahrzeuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2394126A1 true EP2394126A1 (de) | 2011-12-14 |
EP2394126B1 EP2394126B1 (de) | 2015-04-08 |
Family
ID=42110025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10701881.4A Not-in-force EP2394126B1 (de) | 2009-02-05 | 2010-02-02 | Heizkörper für kraftfahrzeuge |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120024510A1 (de) |
EP (1) | EP2394126B1 (de) |
DE (1) | DE102009007619A1 (de) |
WO (1) | WO2010089287A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2986472B1 (fr) * | 2012-02-03 | 2014-08-29 | Valeo Systemes Thermiques | Radiateur de refroidissement pour vehicule, notamment automobile |
SE539124C2 (sv) * | 2014-04-22 | 2017-04-11 | Titanx Engine Cooling Holding Ab | Fordonsvärmeväxlarrör och fordonskylare innefattande sådant rör samt sätt att bilda ett fordonsvärmeväxlarrör |
US10208621B2 (en) | 2015-12-07 | 2019-02-19 | General Electric Company | Surface cooler and an associated method thereof |
JP6815965B2 (ja) * | 2017-10-12 | 2021-01-20 | 株式会社神戸製鋼所 | 熱交換プレートに用いられる金属製元板材 |
DE112019003582T5 (de) * | 2018-07-13 | 2021-04-08 | Marelli Corporation | Wärmeaustauschrohr, wärmeaustauschrohr-herstellungsverfahren, und wärmetauscher |
DE102019000723A1 (de) * | 2019-01-31 | 2020-08-06 | Hydac Cooling Gmbh | Kühler |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4470452A (en) * | 1982-05-19 | 1984-09-11 | Ford Motor Company | Turbulator radiator tube and radiator construction derived therefrom |
US4693307A (en) * | 1985-09-16 | 1987-09-15 | General Motors Corporation | Tube and fin heat exchanger with hybrid heat transfer fin arrangement |
JP3355824B2 (ja) | 1994-11-04 | 2002-12-09 | 株式会社デンソー | コルゲートフィン型熱交換器 |
SE521816C2 (sv) * | 1999-06-18 | 2003-12-09 | Valeo Engine Cooling Ab | Fluidtransportrör samt fordonskylare med sådant |
DE10127084B4 (de) | 2000-06-17 | 2019-05-29 | Mahle International Gmbh | Wärmeübertrager, insbesondere für Kraftfahrzeuge |
DE10319226B4 (de) * | 2002-05-03 | 2021-12-02 | Mahle International Gmbh | Vorrichtung zur Kühlung oder Heizung eines Fluids |
US6904963B2 (en) * | 2003-06-25 | 2005-06-14 | Valeo, Inc. | Heat exchanger |
JP2007093024A (ja) * | 2005-09-27 | 2007-04-12 | Showa Denko Kk | 熱交換器 |
JP2007333254A (ja) * | 2006-06-13 | 2007-12-27 | Calsonic Kansei Corp | 熱交換器用チューブ |
US8235098B2 (en) * | 2008-01-24 | 2012-08-07 | Honeywell International Inc. | Heat exchanger flat tube with oblique elongate dimples |
-
2009
- 2009-02-05 DE DE102009007619A patent/DE102009007619A1/de not_active Withdrawn
-
2010
- 2010-02-02 EP EP10701881.4A patent/EP2394126B1/de not_active Not-in-force
- 2010-02-02 WO PCT/EP2010/051232 patent/WO2010089287A1/de active Application Filing
-
2011
- 2011-08-05 US US13/204,100 patent/US20120024510A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2010089287A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2394126B1 (de) | 2015-04-08 |
WO2010089287A1 (de) | 2010-08-12 |
DE102009007619A1 (de) | 2010-08-12 |
US20120024510A1 (en) | 2012-02-02 |
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