US20020046829A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US20020046829A1
US20020046829A1 US10/010,445 US1044501A US2002046829A1 US 20020046829 A1 US20020046829 A1 US 20020046829A1 US 1044501 A US1044501 A US 1044501A US 2002046829 A1 US2002046829 A1 US 2002046829A1
Authority
US
United States
Prior art keywords
heat exchanger
openings
exchanger according
fins
housing
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.)
Abandoned
Application number
US10/010,445
Other languages
English (en)
Inventor
Walter Bloksma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kelvion Machine Cooling BV
Original Assignee
Bloksma BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bloksma BV filed Critical Bloksma BV
Assigned to BLOKSMA B.V. reassignment BLOKSMA B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLOKSMA, WALTER
Publication of US20020046829A1 publication Critical patent/US20020046829A1/en
Abandoned legal-status Critical Current

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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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by 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

  • the present invention relates to a heat exchanger provided with a housing having a core, comprising a series of plate-shaped fins placed at least almost parallel to each other, in which each fin is provided with pipe openings, and a bundle of pipes for passing a first heat exchange medium, in which each of the pipes extends through respective pipe openings of respective fins, in which the housing is provided with an inlet and an outlet for passing a second heat exchange medium through the housing.
  • Such a heat exchanger is known from Dutch patent application 9500633.
  • the efficiency of the heat exchanger may not be optimal depending on the second heat exchange medium.
  • the heat exchanger is used as oil cooler, so in cases in which the second heat exchange medium is oil, the oil can supposedly “freeze to” the plate-shaped fins and the pipes, which have a lower temperature than the oil.
  • oil flowing between the fins and pipes does not optimally contact the fins and the pipes because a layer of oil is “frozen” on them.
  • the degree of “freezing” strongly depends on the kind of second heat exchange medium, but causes a blockage for the second heat exchange medium, which leads to a high drop in pressure and a low heat exchange.
  • a heat exchanger with which an improved efficiency of the heat exchange can be obtained. It is noted here that a heat exchanger is not only suitable to be used as oil cooler for for instance generators, motors and the like, but that the heat exchanger may for instance also be used for indeed heating the second heat exchange medium.
  • a heat exchanger of the kind described above according to the present invention is characterized in that at least one of the fins is further provided with mix openings. Because the second heat exchange medium during use flows past the mix openings, said flow in comparison to the flow over the locations of the fins where no mix openings have been arranged, is disturbed such that the flow can reach the plate-shaped fins and the pipes, thus improving the efficiency of the heat exchanger. So although the arranging of mix openings reduces the effective surface of the fins, and therefore a lower efficiency would be expected, it appears that the efficiency is indeed improved.
  • the mix openings are placed there where a rate of flow of the second heat exchange medium is high in comparison to the rate of flow on other locations, a further improvement of the efficiency is achieved.
  • the pipe openings are situated in rows next to each other.
  • each of the mix openings are situated between respective adjacent pipe openings.
  • the respective plate-shaped fin is provided with a torsion.
  • the disturbance of the flow of the second heat exchange medium is further increased, as a result of which the efficiency is even further improved.
  • the torsion is such that a flow of second heat exchange medium is directed at a pipe and to a plate-shaped fin, respectively. As a result it is ensured that the “frozen” layer of second heat exchange medium on the pipe and the fins is accurately broken through.
  • FIG. 1 schematically shows a longitudinal cross-section of a heat exchanger according to the invention
  • FIG. 2 schematically shows a top view of a part of a fin according to the present invention, to be used in a heat exchanger according to the present invention
  • FIGS. 5A and 5B schematically show alternative embodiments of a local elevation in a fin in cross-section
  • the heat exchanger 1 as shown in the drawing comprises a substantially cylindrical housing 2 having a core 3 accommodated in there. At the top side near a first end 4 , the housing 2 has an inlet 5 and at the opposite side 6 an outlet 7 .
  • the inlet 5 and the outlet 7 can be connected to a supply and return lead for a second heat exchange medium, for instance oil to be cooled.
  • a second heat exchange medium for instance oil to be cooled.
  • the inlet and the outlet may for that matter also be differently positioned and several inlets and/or outlets may be arranged.
  • the core 3 comprises a bundle of pipes 8 extending almost parallel to each other and in longitudinal direction of the housing 2 .
  • an end plate 9 On both ends of the core 3 an end plate 9 has been arranged which can fittingly be accommodated in or against the housing 2 .
  • the pipes 8 extend through the end plates, as a result of which the ends of the pipes are open and may be connected to a supply and discharge, respectively, of a first heat exchange medium, for instance water or another cooling fluid.
  • a large number of fins 10 have been arranged which extend almost parallel to the end plates and to each other, through which fins the pipes extend.
  • FIG. 2 schematically shows a top view of a part of a fin 10 according to the present invention, to be used in a heat exchanger according to the present invention.
  • the fin 10 is further provided with mix openings 20 . Because the second heat exchange medium for instance oil, during use flows past the mix openings 20 , said flow in comparison with the flow over places of the fin 10 where no mix openings 20 have been arranged, will be distributed such that the flow can reach the pipes 8 or the adjacent fins, thus improving the efficiency of the heat exchanger.
  • the second heat exchange medium for instance oil
  • the mix openings 20 can be arranged on various places on the fin 10 , it is preferred that the mix openings 20 are placed there where a rate of flow of the second heat exchange medium is high in comparison to the rate of flow on other locations. The highest rate of flow appears to be present between two adjacent pipes, so that preferably each of the mix openings 20 is situated between respective adjacent pipe openings 13 , as shown in FIG. 2.
  • the respective plate-shaped fin 10 is provided with a torsion. Because of such a torsion the flow of the second heat exchange medium is further disturbed as a result of which the efficiency of the heat exchange is further improved. Although any given disturbance will result in improvements, excellent results can be obtained when the torsion in such that a flow of second heat exchange medium is directed to a pipe 8 or an adjacent plate-shaped fin.
  • FIGS. 3 to 4 An attempt to show said torsion in a drawing, is made in FIGS. 3 to 4 . In FIG. 3 a channel through the area between the pipe openings 13 is indicated, through which channel the flow takes place.
  • the triangular area 22 (FIG.
  • the fin 10 may be provided with local elevations 23 , 23 ′ (see FIG. 2, and FIGS. 5A and 5B).
  • the elevation 23 , 23 ′ is provided with a groove 24 , 24 ′ which can give a certain direction to the disturbance. Said direction can be adjusted depending on the wanted effect and the second heat exchange medium. In the example shown the direction is approximately 45° with respect to the general flow direction, indicated by arrow S.

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)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US10/010,445 1999-05-11 2001-11-08 Heat exchanger Abandoned US20020046829A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1012029 1999-05-11
NL1012029A NL1012029C2 (nl) 1999-05-11 1999-05-11 Warmtewisselaar.
PCT/NL2000/000288 WO2000068629A1 (fr) 1999-05-11 2000-05-03 Echangeur de chaleur

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2000/000288 Continuation WO2000068629A1 (fr) 1999-05-11 2000-05-03 Echangeur de chaleur

Publications (1)

Publication Number Publication Date
US20020046829A1 true US20020046829A1 (en) 2002-04-25

Family

ID=19769173

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/010,445 Abandoned US20020046829A1 (en) 1999-05-11 2001-11-08 Heat exchanger

Country Status (8)

Country Link
US (1) US20020046829A1 (fr)
EP (1) EP1180232B1 (fr)
AT (1) ATE310222T1 (fr)
AU (1) AU4625300A (fr)
DE (1) DE60024078T2 (fr)
DK (1) DK1180232T3 (fr)
NL (1) NL1012029C2 (fr)
WO (1) WO2000068629A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104990435A (zh) * 2015-07-31 2015-10-21 华南理工大学 一种隔板打孔的板翅式换热器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017737A3 (nl) * 2007-08-24 2009-05-05 Atlas Copco Airpower Nv Warmtewisselaar en afdekplaat daarbij toegepast.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044734B1 (fr) * 1980-07-23 1985-02-20 Armstrong Engineering Limited Echangeur de chaleur
EP0079090B1 (fr) * 1981-11-10 1986-09-10 Asea Brown Boveri Ag Echangeur de chaleur dont le faisceau de tubes est disposé enséries
JPS61143697A (ja) * 1984-12-14 1986-07-01 Mitsubishi Electric Corp 熱交換装置
US4821795A (en) * 1987-10-22 1989-04-18 Mccord Heat Transfer Corporation Undulated heat exchanger fin
DE3924411A1 (de) * 1989-07-24 1991-01-31 Hoechst Ceram Tec Ag Rippenrohrwaermetauscher
EP0644394A1 (fr) * 1993-09-21 1995-03-22 Proizvodstvennoe Obiedinenie "Chernovitsky Mashinostroitelny Zavod" Echangeur de chaleur
NL9500633A (nl) 1995-03-31 1996-11-01 Bloksma B V Warmtewisselaar van het plaatvin-type, voorzien van een uitneembare kern met mantel.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104990435A (zh) * 2015-07-31 2015-10-21 华南理工大学 一种隔板打孔的板翅式换热器

Also Published As

Publication number Publication date
ATE310222T1 (de) 2005-12-15
AU4625300A (en) 2000-11-21
EP1180232A1 (fr) 2002-02-20
DE60024078D1 (de) 2005-12-22
DK1180232T3 (da) 2006-03-27
EP1180232B1 (fr) 2005-11-16
WO2000068629A1 (fr) 2000-11-16
DE60024078T2 (de) 2006-08-03
NL1012029C2 (nl) 2000-11-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BLOKSMA B.V., NETHERLANDS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BLOKSMA, WALTER;REEL/FRAME:012498/0436

Effective date: 20011015

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION