EP1482269A2 - Mit Innenrippen versehene Rohre für Wärmetauscher für einphasige, wässrige Fluide - Google Patents

Mit Innenrippen versehene Rohre für Wärmetauscher für einphasige, wässrige Fluide Download PDF

Info

Publication number: EP1482269A2
Authority: EP; European Patent Office
Prior art keywords: ribs; typically; tubes; tubes according; equal
Prior art date: 2003-05-26
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

Application number

EP04007195A

Other languages

English (en)

French (fr)

Other versions

EP1482269A3 (de

EP1482269B1 (de

Inventor

Nicolas Avanan

Guy De Hollain

Pascal Leterrible

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.)

Trefimetaux SAS

Original Assignee

Trefimetaux SAS

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.)

2003-05-26

Filing date

2004-03-25

Publication date

2004-12-01

2004-03-25 Application filed by Trefimetaux SAS filed Critical Trefimetaux SAS

2004-03-25 Priority to PL04007195T priority Critical patent/PL1482269T3/pl

2004-12-01 Publication of EP1482269A2 publication Critical patent/EP1482269A2/de

2005-11-09 Publication of EP1482269A3 publication Critical patent/EP1482269A3/de

2006-11-29 Application granted granted Critical

2006-11-29 Publication of EP1482269B1 publication Critical patent/EP1482269B1/de

2024-03-25 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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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
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/51—Heat exchange having heat exchange surface treatment, adjunct or enhancement
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
- Y10T29/49382—Helically finned

Definitions

the invention relates to the field of tubes for heat exchangers, and more especially the field of heat exchanger tubes using a so-called fluid "monophasic", that is to say a fluid for which the heat exchange does not understand a cycle of evaporation and condensation, the so-called “two-phase” fluids being those which put into play the latent heat of vaporization and condensation.
Japanese Application No. 57-58088 discloses V-grooved tubes, with H between 0.02 mm and 0.2 mm, and with an angle ⁇ between 4 ° and 15 °. Neighboring tubes are described in Japanese Application No. 57-58094.
Japanese Application No. 52-38663 discloses tubes with V or U grooves, with H between 0.02 and 0.2 mm, a pitch P between 0.1 and 0.5 mm and an angle ⁇ between 4 and 15 °.
U.S. Patent No. 4,044,797 discloses V or U groove tubes adjacent to the preceding tubes.
Japanese Utility Model No. 55-180186 discloses trapezoidal grooved tubes and triangular ribs, with a height H of 0.15 to 0.25 mm, a pitch P of 0.56 mm, a apex angle ⁇ (angle called ⁇ in this document) typically equal to 73 °, an angle ⁇ of 30 °, and an average thickness of 0.44 mm.
U.S. Patent Nos. 4,545,428 and 4,480,684 disclose V-grooved tubes and triangular ribs, with the height H between 0.1 and 0.6 mm, a pitch P between 0.2 and 0.6 mm, an apex angle ⁇ between 50 and 100 °, an angle helix ⁇ between 16 and 35 °.
Japanese Patent No. 62-25959 describes tubes with grooves and trapezoidal ribs, with a groove depth H between 0.2 and 0.5 mm, a pitch P between 0.3 and 1.5 mm, the average width of the grooves being at least equal to the width average ribs.
the pitch P is 0.70 mm and the helix angle ⁇ is 10 °.
the European patent EP-B1-701 680 in the name of the applicant, describes tubes grooved, with grooves with flat bottom and with ribs of different heights H, angle with a helix ⁇ of between 5 and 50 °, with an apex angle ⁇ of between 30 and 60 °, so get better performance after crimping the tubes and fitting in the exchangers.
the present invention relates to tubes or exchangers in the field of fluids monophasic and for reversible applications, ie tubes or exchangers which may be used with water or brine as coolants or coolers, that is, typically to cool air in the heat exchangers air conditioners, typically to heat air in said exchangers.
said helix angle ⁇ may preferably range from 25 ° to 35 °. Indeed, it is the field which makes it possible to obtain a high coefficient of exchange Hi and which allows to be manufactured by grooving a tube, the exchange coefficient Hi decreasing substantially for the lower values of the helix angle ⁇ and the speed of decreasing manufacturing for higher values of ⁇ helix.
said apex angle ⁇ may be typically less than 45 ° and may be preferably between 15 and 30 °. Indeed, for higher values of the apex angle ⁇ , the exchange coefficient Hi tends to decrease, and for lower values, there are manufacturing difficulties, in particular because of the wear of tools or shaping mandrels, and in addition the acute angles tend to be destroyed during the formation of a battery with fin, during the expansion of the tubes.
the H / De ratio may be 0.028 ⁇ 0.3.
the ratio P / H can go from 3.5 to 7, but the best results are obtained when this report goes from preferably from 4 to 6 (see test A for example), and in particular for H values relatively high at least equal to 0.30 mm.
said ribs may be triangular, trapezoidal or quadrilateral, possibly at rounded corners.
said ribs may have a "trapezoid" type profile with a base and an apex, said vertex comprising a substantially flat central portion, and possibly sloping with respect to said base, as illustrated in FIG. 2c. .
the top of said rib forming a short side of the trapezium may have rounded edges, as is often the case when the profile of the ribs forms a triangle.
said rounded apex and / or said rounded edges may have radii of curvature less than 100 ⁇ m
the connection of ribs audits funds typically dishes having radii of curvature of less than 100 ⁇ m, preferably from 20 to 50 ⁇ m.
Said rounded vertex or rounded edges may have a radius of curvature preferably less than 80 ⁇ m, said radius of curvature being typically 40 ⁇ m to 80 ⁇ m.
said ribs may be symmetrical and connect to said typically flat bottoms with right and left connection angles ⁇ 1 and ⁇ 2 such that ⁇ 1 - ⁇ 2 is typically equal to 0 or at most equal to 10 °, so as to form symmetrical or quasi-symmetrical ribs.
said ribs may be connected to said typically flat bottoms with right and left connection angles ⁇ 1 and ⁇ 2 such that ⁇ 1 - ⁇ 2 is at least equal to 10 °, so to form asymmetrical or inclined ribs.
said ribs may form an alternating succession of ribs having right and left connection angles ⁇ 1 and ⁇ 2 for one, and ⁇ 2 and ⁇ 1 for the other.
said ribs may have a base of triangular shape over a height h B and a vertex of trapezoidal shape over a height h s , with H being equal to h B + h S , and h B / h S ranging from typically from 1 to 2.
said tubes may comprise secondary ribs of height H ' ⁇ 0.5.H and typically located at mid-distance between two ribs of height H or height H1 and H2.
said tubes can comprise in addition an axial grooving creating in said ribs profile notches typically triangular with rounded apex, said vertex having an angle ⁇ ranging from 25 to 65 °, said lower part or top is at a distance h from the bottom of said grooves ranging from 0 to 0.2 mm.
the grooved tubes according to the invention can be made of Cu and alloys of Cu, Al and alloys of Al, Fe and Fe alloys. These tubes, typically not fluted, can be obtained typically by grooving tubes, or possibly by flat grooving of a metal strip and forming a welded tube. These tubes may be of typically round cross section, oval or rectangular. They may be of oval or rectangular section, particularly in the case of welded tubes.
Another subject of the invention consists of heat exchangers using tubes according to the invention.
these exchangers may comprise heat exchange fins in contact with said tubes on a fraction of said tubes, in which the maximum distance between said fins and said tubes, on the fraction that is not in contact. is less than 0.01 mm, and preferably less than 0.005 mm.
Another object of the invention is constituted by the use of tubes according to the invention, and by the use of exchangers according to the invention, tubes and exchangers in which the coolant or coolant fluid is used as a monophasic fluid typically chosen. among: water, aqueous glycol solutions typically with 30% glycol, K formate and / or actetate solutions, sorbets, organic liquids, liquid CO 2 .
the coolant or heat transfer fluid can be used as a typically selected monophasic fluid with dynamic viscosity characteristics of between 0.5 and 30 mPa and a Prandtl number of between 5 and 160.
Grooved copper tubes according to the invention having a diameter of 12.0 mm outside diameter, tubes referenced A, B, C, D and G, and control tubes referenced E, F and G, the tube referenced L corresponding to a smooth control tube.
other tests have been carried out of other diameters De, tests which have shown that the grooving according to the invention made it possible to choose a thickness Tf with a groove bottom such that Tf / De is equal to 0.023 ⁇ 0.005, which leads to a thickness Tf substantially lower than the standard thickness and therefore a significant weight gain, the tube retaining satisfactory mechanical performance of use. Ref.
the tubes were tested with two types of monophasic fluids: on the one hand an aqueous solution of 30% by volume of monopropylene glycol, and on the other hand a K formate solution of up to -30.degree. last having a freezing temperature of -55 ° C, against -40 ° C for monopropylene glycol solution. The tests were carried out at + 5 ° C and at -5 ° C.
the dynamic viscosity (m.Pa.s) of the solutions used at these two temperatures was measured: T Monopropylene glycol (m.Pa.s) K formate solution - 5 ° C 20 4.5 + 5 ° C 10 2.5
the number of Prandtl for monopropylene glycol was measured: 142 to -5 ° C. and 80 to + 5 ° C.
the number of Prandtl is 20 to + 5 ° C.
the tubes A, B, C, D and G have a weight per meter of 125 g / m, whereas the control tubes E and F, which correspond to grooved tubes of the state of the art, have a weight per meter 140 g / m, the tube L having a weight per meter of 130 g / m.
the weight gain is 10% compared to the grooved tubes of the state of the art and 4% compared to the smooth tube generally used in this application.
the heat exchange coefficient Hi was measured as a function of the pressure drop dP (Pa / m).
the following table gives the values of Hi for a pressure drop of 14 KPa / m and 16 KPa / m: DP KPa / m HiA HiC HiG HiF HiE HiL 14 3209 2777 2640 2300 2300 2300 16 3664 3300 3050 2936 2709 2709
the tests at + 5 ° C. were carried out on the tubes A, B, C, E, F and L.
the heat exchange coefficient Hi was measured as a function of the pressure drop dP (Pa / m).
the following table gives the values of Hi for a pressure drop of 4 KPa / m. of 8 KPa / m and 12 KPa / m: Dp KPa / m HiA HiB HiC HiE HiF HiL 4 2545 2273 1591 1591 1591 1591 8 4000 3545 2455 2273 2273 2273 12 4545 4409 3409 3045 2909 2773
the heat exchange coefficient Hi was measured as a function of the pressure drop dP (Pa / m).
the following table gives the values of Hi for a pressure drop of 4, 8 and 12 KPa / m: Dp KPa / m HiA HiB HiC HiE HiF HiL 4 3256 2325 2791 2325 2325 2325 8 4000 3674 4280 3442 3674 3116 12 4744 4465 5000 4465 4465 3581
the tube A is extremely efficient and advantageous.
tubes B and C may be advantageous.
the tube B may be in the case of a heat exchange at + 5 ° C with an aqueous monopropylene glycol solution as a fluid flowing in the exchanger.
the tube C may be advantageous in the case of a heat exchange at + 5 ° C with an aqueous solution of K formate as a fluid flowing in the exchanger.
the invention has great advantages.
the invention allows on the one hand to have heat exchanger tubes of high efficiency with regard to heat exchange with a very high exchange coefficient Hi.
the relatively small number of ribs also helps to lighten the tubes.
the tubes according to the invention are particularly suitable for all single-phase fluid heat exchange circuits, especially those using aqueous solutions, which is very advantageous in practice.

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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)
Rigid Pipes And Flexible Pipes (AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

EP04007195A 2003-05-26 2004-03-25 Mit Innenrippen versehene Rohre für Wärmetauscher für einphasige, wässrige Fluide Expired - Lifetime EP1482269B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
PL04007195T PL1482269T3 (pl)	2003-05-26	2004-03-25	Rury rowkowane dla wymienników ciepła z czynnikiem jednofazowym, typowo wodnym

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR0306316A FR2855601B1 (fr)	2003-05-26	2003-05-26	Tubes rainures pour echangeurs thermiques a fluide monophasique, typiquement aqueux
FR0306316		2003-05-26

Publications (3)

Publication Number	Publication Date
EP1482269A2 true EP1482269A2 (de)	2004-12-01
EP1482269A3 EP1482269A3 (de)	2005-11-09
EP1482269B1 EP1482269B1 (de)	2006-11-29

Family

ID=33104470

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP04007195A Expired - Lifetime EP1482269B1 (de)	2003-05-26	2004-03-25	Mit Innenrippen versehene Rohre für Wärmetauscher für einphasige, wässrige Fluide

Country Status (9)

Country	Link
US (1)	US7267166B2 (de)
EP (1)	EP1482269B1 (de)
AT (1)	ATE347083T1 (de)
DE (1)	DE602004003422T2 (de)
DK (1)	DK1482269T3 (de)
ES (1)	ES2278241T3 (de)
FR (1)	FR2855601B1 (de)
PL (1)	PL1482269T3 (de)
PT (1)	PT1482269E (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1804013A1 (de) *	2005-12-27	2007-07-04	Calsonic Kansei Corporation	Wärmetauscherblock
WO2015007645A1 (en) *	2013-07-18	2015-01-22	Luvata Espoo Oy	A tube for heat transfer

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JP4665713B2 (ja) *	2005-10-25	2011-04-06	日立電線株式会社	内面溝付伝熱管
FR2893124B1 (fr) *	2005-11-09	2008-03-21	Trefimetaux	Tubes rainures pour echangeurs thermiques a resistance a l'expansion amelioree
CN100365370C (zh) *	2005-12-20	2008-01-30	金龙精密铜管集团股份有限公司	一种内螺纹传热管
US7954544B2 (en) *	2007-11-28	2011-06-07	Uop Llc	Heat transfer unit for high reynolds number flow
JP2009162395A (ja) *	2007-12-28	2009-07-23	Showa Denko Kk	二重管式熱交換器
US20110083619A1 (en) *	2009-10-08	2011-04-14	Master Bashir I	Dual enhanced tube for vapor generator
DE102009060395A1 (de)	2009-12-22	2011-06-30	Wieland-Werke AG, 89079	Wärmeübertragerrohr und Verfahren zur Herstellung eines Wämeübertragerrohrs
JP2011144989A (ja) *	2010-01-13	2011-07-28	Mitsubishi Electric Corp	熱交換器用の伝熱管、熱交換器、冷凍サイクル装置及び空気調和装置
US10697629B2 (en) *	2011-05-13	2020-06-30	Rochester Institute Of Technology	Devices with an enhanced boiling surface with features directing bubble and liquid flow and methods thereof
JP2013092335A (ja) *	2011-10-27	2013-05-16	Mitsubishi Alum Co Ltd	熱交換器用アルミニウム細管およびこれを用いた熱交換器
IN2015DN03287A (de) *	2012-09-21	2015-10-09	Ng1 Technologies Llc
EP3377838B1 (de) *	2015-11-17	2022-02-23	Arvind Jaikumar	Behältersiedeverbesserung mit zuführkanälen zum zuführen von flüssigkeit zu nukleierungsbereichen
GB2570005B (en) *	2018-01-09	2022-09-14	Paralloy Ltd	Pipes for chemical processing
US12326304B2 (en) *	2019-11-29	2025-06-10	Ma Aluminum Corporation	Inner spiral grooved tube with excellent heat transfer property and heat exchanger
JP6868146B1 (ja) *	2020-06-29	2021-05-12	株式会社クボタ	流体撹拌要素を具える熱分解管
CN111854503A (zh) *	2020-07-13	2020-10-30	珠海格力电器股份有限公司	冷凝管、冷凝器及空调系统
CA3139673A1 (en) *	2020-12-02	2022-06-02	Carrier Corporation	Heat transfer tube for air conditioner application
GB202104924D0 (en) *	2021-04-07	2021-05-19	Paralloy Ltd	Axial reformer tube
CA3215741A1 (en) *	2021-04-07	2022-10-13	Paralloy Limited	Axial reformer tube

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FR2837270B1 (fr) *	2002-03-12	2004-10-01	Trefimetaux	Tubes rainures a utilisation reversible pour echangeurs thermiques

2003
- 2003-05-26 FR FR0306316A patent/FR2855601B1/fr not_active Expired - Fee Related
2004
- 2004-03-25 ES ES04007195T patent/ES2278241T3/es not_active Expired - Lifetime
- 2004-03-25 DE DE602004003422T patent/DE602004003422T2/de not_active Expired - Lifetime
- 2004-03-25 AT AT04007195T patent/ATE347083T1/de active
- 2004-03-25 PT PT04007195T patent/PT1482269E/pt unknown
- 2004-03-25 EP EP04007195A patent/EP1482269B1/de not_active Expired - Lifetime
- 2004-03-25 PL PL04007195T patent/PL1482269T3/pl unknown
- 2004-03-25 DK DK04007195T patent/DK1482269T3/da active
- 2004-05-25 US US10/853,799 patent/US7267166B2/en not_active Expired - Fee Related

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1804013A1 (de) *	2005-12-27	2007-07-04	Calsonic Kansei Corporation	Wärmetauscherblock
WO2015007645A1 (en) *	2013-07-18	2015-01-22	Luvata Espoo Oy	A tube for heat transfer
US9891009B2 (en)	2013-07-18	2018-02-13	Luvata Alltop (Zhongshan) Ltd.	Tube for heat transfer

Also Published As

Publication number	Publication date
EP1482269A3 (de)	2005-11-09
US7267166B2 (en)	2007-09-11
PT1482269E (pt)	2007-03-30
ATE347083T1 (de)	2006-12-15
DE602004003422T2 (de)	2008-02-21
FR2855601B1 (fr)	2005-06-24
DK1482269T3 (da)	2007-04-02
DE602004003422D1 (de)	2007-01-11
US20050045319A1 (en)	2005-03-03
EP1482269B1 (de)	2006-11-29
PL1482269T3 (pl)	2007-04-30
ES2278241T3 (es)	2007-08-01
FR2855601A1 (fr)	2004-12-03

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