EP0164391B1 - Plaque d'echangeur thermique - Google Patents

Plaque d'echangeur thermique Download PDF

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Publication number
EP0164391B1
EP0164391B1 EP85900237A EP85900237A EP0164391B1 EP 0164391 B1 EP0164391 B1 EP 0164391B1 EP 85900237 A EP85900237 A EP 85900237A EP 85900237 A EP85900237 A EP 85900237A EP 0164391 B1 EP0164391 B1 EP 0164391B1
Authority
EP
European Patent Office
Prior art keywords
plate
heat exchange
ridges
valleys
secondary heat
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.)
Expired
Application number
EP85900237A
Other languages
German (de)
English (en)
Other versions
EP0164391A1 (fr
Inventor
Jan-Ove Bergqvist
Nils Stadmark
Arthur Dahlgren
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.)
Alfa Laval Thermal AB
Original Assignee
Alfa Laval Thermal AB
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20353653&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0164391(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Alfa Laval Thermal AB filed Critical Alfa Laval Thermal AB
Priority to AT85900237T priority Critical patent/ATE28511T1/de
Publication of EP0164391A1 publication Critical patent/EP0164391A1/fr
Application granted granted Critical
Publication of EP0164391B1 publication Critical patent/EP0164391B1/fr
Expired 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
    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart

Definitions

  • This invention relates to plate heat exchangers, and in particular relates to a heat exchanger plate of the kind having a central primary heat exchange part, separating two secondary heat exchange parts, and four holes or ports located two in each secondary heat exchange part at equal distances from a centre line of the heat exchanger plate extending through the primary and secondary heat exchange parts.
  • a great number of plates of this kind manufactured of a relatively thin plate, can be clamped together under great pressure between two thicker end plates of a frame.
  • Two heat exchange media are intended to flow through the interspaces defined between the plates, they are conducted to and from the interspaces through channels formed by the ports in the heat exchanger-plates, which ports are in line with each other.
  • Adjacent plates are sealed together, e.g. by gaskets or other means, so that the flow passage between them is sealed from the surrounding environment.
  • the heat exchange medium which passes therethrough can flow either diagonally over the heat exchanger plates, or essentially parallel with the centre line and two sides of the plates.
  • This invention concerns a plate for diagonal flow and which for this reason, in a known way, is adapted, e.g. by provision of a gasket or the like, to be sealed to an adjacent plate around a sealing line which surrounds all the heat exchange parts and two diagonally opposite ports.
  • heat exchanger plates prefferably be given a corrugation pattern of ridges and intervening valleys pressed in the plate, so that when two substantially similar plates are put against each other - with one of them turned through 180° relative to the other one- the ridges of one plate rest against and intersect the ridges of the other plate. At least the ridges and valleys in the secondary heat exchange parts are so arranged that they have substantially equal volumes on the opposite sides of the plate.
  • a heat exchanger plate as described above is known from SE-B- 342.691.
  • the ridges and valleys form the same angles (60° and 120 0 ) with the centre line of the plate as do the ridges and the valleys in the primary heat exchange part, while in the other secondary heat exchange part the ridges and the valleys extend parallel to the centre line.
  • the purpose of the special design of the ridges and the valleys in the other secondary heat exchange part is, according to the patent, to bring about a reduced flow resistance for a heat exchange medium streaming through a plate interspace formed by two equal plates of this form, in the area closest to the port through which it enters the plate interspace, i.e. where the through-flow area for the heat exchange medium is substantially less than it is at the primary heat exchange parts or the plates.
  • the aim of the present invention is to provide a heat exchanger plate enabling improved efficiency.
  • a heat exchanger plate having a central primary heat exchange part located between two secondary heat exchange parts, and four ports located two in each secondary heat exchange part, the two ports in each secondary heat exchange part being at the same distance from but on opposite sides of the centre line of the heat exchanger plate extending through the primary and secondary heat exchange parts, - the primary heat exchange part and the secondary heat exchange parts having corrugation ridges and valleys so arranged that when the plate is positioned against another substantially similar plate turned through 180° relative to said plate, the ridges of the respective plates will intersect and rest against one another, and in at least the secondary heat exchange parts the corrugation valleys on one side of the plate being of substantially the same volume as the corrugation valleys on the other side of the plate, characterized in that the plate is adapted to be sealed to another similar plate positioned thereagainst around a sealing line surrounding all the heat exchange parts and two diagonally opposite ports of said plate, whereby to delimit a passage for flow of a heat exchange medium between the plates from one port to
  • FIG 1 is schematically shown a heat exchanger plate with a primary heat exchange part 1, two secondary heat exchange parts 2, 3 and four through holes or so-called ports 4, 5, 6 and 7.
  • Two fulldrawn lines 8 and 9 illustrate how a first heat exchange medium is intended to stream on one side of the plate from the port 4 to the diagonally oppositely positioned port 6, while two broken lines 10 and 11 illustrate how a second heat exchange medium is intended to stream on the other side of the plate from the port 7 to the port 5.
  • FIG 2 there are shown two heat exchanger plates 12 and 13 similarly pressed or embossed.
  • One plate is turned through 180° in its own plane relative to the other one.
  • Each plate 12 and 13, respectively has a primary heat exchange part 1a, two secondary heat exchange parts 2a and 3a, respectively, and four ports 4a, 5a, 6a and 7a.
  • On the side of the plate 12 visible in Figure 2 all three heat exchange parts 1a. 2a and 3a together with the ports 4a and 6a are surrounded by a gasket 14 arranged in a groove pressed in the plate. Separate gaskets (not shown in the drawing) surround the ports 5a and 7a, respectively.
  • In the plate 13 all three heat exchange parts 1a, 2a and 3a and the ports 5a and 7a are similarly surrounded by a gasket 15.
  • the primary heat exchange part 1a a of each plate 12 and 13, has a corrugation pattern of ridges and valleys brought about by pressing.
  • the pattern is symmetrical with respect to a centre line M of the plate and forms such angles relative to this centre line that in an interspace formed between two adjacent plates arranged together as shown in Figure 2, the ridges of one plate intersect with and may rest against the ridges of the other plate.
  • the secondary heat exchange parts 2a and 3a of the plates 12 and 13 also have ridges and valleys which are inclined to the centre line M so that in the interspace between two plates assenbled together as in Figure 2, ridges in the part 2a of one plate intersect and can rest against ridges in the part 3a of the other plate.
  • the ridges and valleys in the primary heat exchange parts la of the plates 12 and 13 form an angle of about 60° with the centre line M on one side of this line and an angle of about 120° with the centre line M on the other side of this line.
  • the ridges and valleys form an angle of about 45° with the centre line M, while corresponding angle is about 135° in the other secondary heat exchange parts 3a.
  • one of the heat exchanging media streams essentially cross the flow direction for the second medium at each of the secondary heat exchange parts of the plate. If the same flow conditions are required for both heat exchange media it is necessary, with plates intended for diagonal flow that the ridges and the valleys in the secondary heat exchange parts are so designed that they have volumes of essentially the same size on opposite sides of the plate.
  • Figure 3 is a sectional view along the line III-III in Figure 2.
  • Figure 3 there are shown two planes 16 and 17 extending through the tops of the ridges formed on each side of a plate.
  • the enclosed volume between the plane 16 and two adjacent ridges on one side of the plate is accordingly essentially equal to the volume between the plane 17 and two adjacent ridges on the other side of the plate.
  • Figure 4 illustrates how ridges in the secondary heat exchange part 2a or the plate 12 intersect ridges in the secondary heat exchange part 3a of the plate 13 when the plates 12 and 13 are arranged to form a plate interspace in accordance with Figure 2.
  • Figure 5 similarly illustrates the manner in which the ridges in the primary heat exchange parts 1a of the plates 12 and 13 intersect.
  • the flow resistances are very different for different flow directions.
  • the flow resistance is several times greater than the resistance to flow in the direction 23.
  • the flow resistance is something therebetween.
  • the flow resistance in a plate interspace according to Figure 5, for a flow with the direction 21, is also greater than the flow resistance in a plate interspace according to Figure 4 irrespective of the direction of the flow in the latter interspace.
  • FIG 6 there are shown two similar heat exchange plates 24 and 25 equally pressed or embossed.
  • the only difference between these plates and the plates 12 and 13, respectively, in Figure 2 is the design of the secondary heat exchange parts of the plates.
  • the heat exchange parts of the plates 24 and 25 have been denoted 1b, 2b and 3b in Figure 6.
  • the ports in the plates have been denoted 4b, 5b, 6b and 7b, and the two gaskets have been denoted 26 and 27, respectively.
  • the ridges and the valleys in each of the secondary heat exchange parts 2b and 3b are symmetrical with regard to the centre line M of the plates.
  • the ridges form an angle of ahout 45° with the centre line both in the part 2b and in the part 3b, while on the other side of the centre line M the ridges in both parts 2b and 3b form an angle of about 135° with the centre line.
  • the different design of the secondary heat exchange parts of the plates 24 and 25 does not materially influence the flow resistance in a plate interspace formed by these plates, as compared with the flow resistance in a plate interspace formed by the plates 12 and 13 in Figure 2.
  • the ridges in the secondary heat exchange parts of the plates resting against cach other intersect at right angles, and in both cases the ridges of one plate form an angle of 45° and the ridges of the other plate an angle of 135° with the centre line of the plates.
  • the division of the corrugation pattern, i.e. the pitch of the ridges and valleys, in the secondary heat exchange part is, in both embodiments according to Figures 2 and 6, essentially the same as that of the corrugation pattern in the primary heat exchange part.
  • the ridges on one side of the centre line M can form an angle of 90° with this line, while the ridges on the other side of the centre line M form another angle or extend parallel with the centre line.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Power Steering Mechanism (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (6)

1. Plaque d'échangeur de chaleur comprenant une partie d'échange de chaleur centrale primaire (1) disposée entre deux parties d'échange de chaleur secondaires (2, 3), et quatre ouvertures (4-7) dont deux sont situées respectivement dans chaque partie d'échange de chaleur secondaire, les deux ouvertures de chaque partie d'échange de chaleur secondaire étant situées à la même distance mais sur les côtés opposés de l'axe central (M) de la plaque d'échange de chaleur passant par les parties d'échange de chaleur primaire et secondaires, la partie d'échange de chaleur primaire (1) et les parties d"échange de chaleur secondaires (2, 3) présentant des ondulations en forme de crêtes et de vallées disposées de manière que, lorsque la plaque est positionnée contre une autre plaque sensiblement similaire et tournée sur 180° par rapport à ladite plaque, les crêtes des plaques respectives s'intersectent et reposent les unes contre les autres, et les vallées des ondulations sur un côté de la plaque, dans les parties d'échange de chaleur secondaires (2, 3) au moins, étant sensiblement de même volume que les vallées et les ondulations de l'autre côté de la plaque, caractérisée en ce que la plaque est adaptée à être reliée de façon étanche à une autre plaque similaire disposée contre elle autour d'une ligne de scellement entourant toutes les parties d'échange de chaleur (1-3) et deux ouvertures diagonalement opposées (4, 6; 5, 7) de la dite plaque, de manière à délimiter un passage pour l'écoulement d'un agent échangeur de chaleur entre les plaques entre une ouverture (4, 7) et l'ouverture diagonalement opposée (5, 6), en ce que dans chacune des deux parties d'échange de chaleur secondaires (2a, 3a; 2b, 3b), au moins sur un côté dudit l'axe central (M) de la plaque, les crêtes et les vallées s'étendent en formant un angle avec l'axe, en ce que les crêtes et les vallées de la partie d'échange de chaleur centrale primaire (1a; 1b) et chaque partie d'échange de chaleur secondaires (2a, 3a; 2b, 3b) s'étendent en formant des angles différents avec ledit l'axe central (M) de la plaque et en ce que les arêtes et les vallées forment avec l'axe central (M) de la plaque des angles tels que lorsque la plaque est disposée contre une autre plaque sensiblement similaire tournée de 180° par rapport à ladite plaque, un espacement entre Plaques est constitué, présentant pour l'écoulement par l'espace intermédiaire une résistance à l'écoulement par unité de longueur qui est plus faible, sur la totalité des surfaces des régions d'échange de chaleur secondaires (2a, 3a; 2b, 3b), que ne l'est ladite résistance sur la surface de la région d'échange de chaleur centrale primaire (1a, 1b).
2. Plaque d'échangeur de chaleur selon la revendication 1, dans laquelle les crêtes et les vallées s'étendent dans des directions telles que,lorsque la plaque est disposée contre une autre plaque sensiblement similaire et tournée sur 180° par rapport à ladite plaque, les crêtes reposant les unes contre les autres s'intersectent en formant dans les parties d'échange de chaleur secondaires (2a, 3a; 2b, 3b) des angles différents de ceux des parties d'échange de chaleur centrale primaire (1a, 1b).
3. Plaque d'échangeur de chaleur selon la revendication 2, dans laquelle les crêtes et les vallées de la partie d'échange de chaleur primaire (1a, 1 b) sont disposées selon un angle de l'ordre de 60° (120°) par rapport à l'axe central (M) de la plaque, et les crêtes et les vallées des parties d'échange de chaleur secondaires (2a, 3a; 2b, 3b) sont disposées en formant un angle de l'ordre de 45° (135°) avec l'axe central (M) de la plaque.
4. Plaque d'échangeur de chaleur selon l'une quelconque des revendications précédentes, dans laquelle les crêtes et les vallées s'étendent dans une directions dans les parties d'échange de chaleur secondaires (2b, 3b) situées sur un côté de l'axe central (M) de la plaque, et dans une autre direction dans les parties d'échange de chaleur secondaires (2b, 3b) situées sur l'autre côté de l'axe central (M).
5. Plaque d'échangeur de chaleur selon la revendication 4, dans laquelle les crêtes et les vallées de chaque partie d'échange de chaleur secondaire (2b, 3b) sont symétriques par rapport à l'axe central (M) de la plaque.
6. Plaque d'échangeur de chaleur selon l'une quelconque des revendications précédentes, dans laquelle la subdivision du motif formé par les ondulations de la partie d'échange de chaleur secondaire est sensiblement la même que celle du motif des ondulations de la partie d'échange de chaleur centrale primaire.
EP85900237A 1983-12-08 1984-12-05 Plaque d'echangeur thermique Expired EP0164391B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85900237T ATE28511T1 (de) 1983-12-08 1984-12-05 Waermeaustauscherplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8306795A SE8306795D0 (sv) 1983-12-08 1983-12-08 Vermevexlarplatta
SE8306795 1983-12-08

Publications (2)

Publication Number Publication Date
EP0164391A1 EP0164391A1 (fr) 1985-12-18
EP0164391B1 true EP0164391B1 (fr) 1987-07-22

Family

ID=20353653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85900237A Expired EP0164391B1 (fr) 1983-12-08 1984-12-05 Plaque d'echangeur thermique

Country Status (9)

Country Link
EP (1) EP0164391B1 (fr)
JP (1) JPS61500626A (fr)
AT (1) ATE28511T1 (fr)
BR (1) BR8407210A (fr)
DE (1) DE3464961D1 (fr)
DK (1) DK359285D0 (fr)
NO (1) NO853123L (fr)
SE (1) SE8306795D0 (fr)
WO (1) WO1985002670A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE458805B (sv) * 1985-06-06 1989-05-08 Reheat Ab Plattvaermevaexlare, vari varje platta aer uppdelad i fyra omraaden med sinsemellan olika riktning paa korrugeringarna
JP2547231B2 (ja) * 1986-10-22 1996-10-23 アルフア‐ラヴアル サーマル アーベー 二重壁構造のプレート型熱交換器とその製造方法
DE4020735A1 (de) * 1990-06-29 1992-01-02 Schmidt Bretten W Gmbh Plattenwaermeaustauscher
DE102004036951A1 (de) 2003-08-01 2005-05-25 Behr Gmbh & Co. Kg Wärmeübertrager sowie Verfahren zu dessen Herstellung
SE526831C2 (sv) * 2004-03-12 2005-11-08 Alfa Laval Corp Ab Värmeväxlarplatta och plattpaket
SE528879C2 (sv) * 2005-07-04 2007-03-06 Alfa Laval Corp Ab Värmeväxlarplatta, par av två värmeväxlarplattor samt plattpaket för plattvärmeväxlare
CN1837718A (zh) 2006-03-09 2006-09-27 缪志先 肋板式换热器
JP5819592B2 (ja) * 2010-06-16 2015-11-24 三菱電機株式会社 プレート式熱交換器及びヒートポンプ装置
JP5661119B2 (ja) 2010-11-12 2015-01-28 三菱電機株式会社 プレート式熱交換器及びヒートポンプ装置
JP5538344B2 (ja) * 2011-11-09 2014-07-02 三菱電機株式会社 プレート式熱交換器及びヒートポンプ装置
EP3404350B1 (fr) * 2016-01-13 2022-08-17 Hisaka Works, Ltd. Échangeur de chaleur à plaques
SE541591C2 (en) * 2016-02-24 2019-11-12 Alfa Laval Corp Ab A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE411952B (sv) * 1978-07-10 1980-02-11 Alfa Laval Ab Vermevexlare innefattande ett flertal i ett stativ inspenda vermevexlingsplattor
SE415928B (sv) * 1979-01-17 1980-11-10 Alfa Laval Ab Plattvermevexlare

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE342691B (fr) * 1970-01-21 1972-02-14 Uk Ni Konstr I Khim Mash
GB1339542A (en) * 1970-03-20 1973-12-05 Apv Co Ltd Plate heat exchangers
SE365609B (fr) * 1971-10-01 1974-03-25 Alfa Laval Ab
JPS4875785A (fr) * 1972-01-13 1973-10-12
JPS5154972A (en) * 1974-11-06 1976-05-14 Ichigoro Sekine Kogosei kokangensei biseibutsuno renzokubaiyoho
DE2552335A1 (de) * 1975-11-21 1977-06-08 Impulsa Veb K Waermeuebertragungsplatten
IT1055235B (it) * 1976-02-12 1981-12-21 Fischer H Scambiatore di calore a piastre formato da piastre aventi forme diverse
JPS5320481A (en) * 1976-08-06 1978-02-24 Nakajima Sakao Light transporting method applicable to photochemically reactive cultivation and like
DE2934328C2 (de) * 1979-08-24 1982-04-29 Stephan Dipl.-Chem. Dr.rer.nat. 8000 München Nees Verfahren zur Kultivierung matrixgebundener biologischer Zellsysteme sowie Vorrichtung zur Ausübung des Verfahrens
DE3141161C2 (de) * 1981-10-16 1984-04-26 W. Schmidt GmbH & Co KG, 7518 Bretten Plattenwärmeaustauscher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE411952B (sv) * 1978-07-10 1980-02-11 Alfa Laval Ab Vermevexlare innefattande ett flertal i ett stativ inspenda vermevexlingsplattor
SE415928B (sv) * 1979-01-17 1980-11-10 Alfa Laval Ab Plattvermevexlare

Also Published As

Publication number Publication date
WO1985002670A1 (fr) 1985-06-20
EP0164391A1 (fr) 1985-12-18
DK359285A (da) 1985-08-07
ATE28511T1 (de) 1987-08-15
SE8306795D0 (sv) 1983-12-08
BR8407210A (pt) 1985-11-26
NO853123L (no) 1985-10-07
JPS61500626A (ja) 1986-04-03
DE3464961D1 (en) 1987-08-27
DK359285D0 (da) 1985-08-07

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