US20160363395A1 - Plate for use as heat exchange plate and method for manufacturing such base plate - Google Patents

Plate for use as heat exchange plate and method for manufacturing such base plate Download PDF

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Publication number
US20160363395A1
US20160363395A1 US15/120,912 US201515120912A US2016363395A1 US 20160363395 A1 US20160363395 A1 US 20160363395A1 US 201515120912 A US201515120912 A US 201515120912A US 2016363395 A1 US2016363395 A1 US 2016363395A1
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United States
Prior art keywords
plate
projections
width
heat
ridges
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Abandoned
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US15/120,912
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English (en)
Inventor
Keitaro Tamura
Yasuyuki Fujii
Yoshio Itsumi
Hideto Oyama
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Kobe Steel Ltd
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Kobe Steel Ltd
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Assigned to KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) reassignment KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUJII, YASUYUKI, ITSUMI, YOSHIO, OYAMA, HIDETO, TAMURA, KEITARO
Publication of US20160363395A1 publication Critical patent/US20160363395A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
    • 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
    • F28F3/048—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 ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
    • 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
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/08—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes pressed; stamped; deep-drawn

Definitions

  • the present invention relates to a plate for use as heat-exchanging plate and to a method for producing the plate.
  • Patent Literature 1 and Patent Literature 2 disclose the following technologies as methods for transferring micron-order fine irregularities onto the surface of a plate.
  • Patent Literature 1 The method for transfer onto a metal plate surface disclosed in Patent Literature 1 involves pressing a transfer portion having irregularities, which has been transferred to the outer peripheral face of transfer rolls, against a metal sheet that is transported by transport rolls. In this method, transferred portions of irregular shape identical to those of the transfer portions of the transfer rolls become formed on the surface of the metal sheet.
  • a plate of a heat-exchanging plate disclosed in Patent Literature 2 is a plate for a heat-exchanging plate, the plate being constituted by a titanium-made flat plate having fine irregularities formed on the surface, and being obtained through press working, as a post-process, of the flat plate.
  • the irregularities on the surface thereof are set in such a manner that a shape parameter defined as height ( ⁇ m) of projections ⁇ [width ( ⁇ m) of recesses/pitch ( ⁇ m) between adjacent projections/angle (deg) of projections] is 0.94 or smaller.
  • the heat-exchanging plate has enhanced heat transfer properties by virtue of the increased surface area achieved through formation of micron-order fine irregularities on the surface of the flat plate.
  • plates (flat plate) having fine irregularities formed on the surface are rarely used as they are (i.e. with irregularities remaining thereon), as heat-exchanging plates.
  • a plurality of projections having a height ranging from several mm to several cm is formed by press working on the surface of the heat-exchanging plate.
  • the fine irregularities formed on the surface of the plate for the heat-exchanging plate are flattened during press working. It is accordingly desirable to enhance the press formability of the plate.
  • Patent Literature 2 discloses a technology for solving the issue of press formability of the above plates.
  • press formability of the plate is enhanced by defining a shape parameter of the irregularities that are formed on the surface of the heat-exchanging plate.
  • the projections formed on the plate promote turbulence and forced convection, to thereby enhance condensation thermal transfer.
  • the condensation thermal transfer achieved by the heat-exchanging plate is significantly affected by the discharge of the generated liquid.
  • the effect of discharge of the generated liquid may in some instances be weaker than expected (i.e. smaller discharge amount of generated liquid), since the generated liquid spreads out on account of surface tension. Heat transfer properties in a condensation thermal transfer process are thus hard to enhance in the plate formed using the technology of Patent Literature 2.
  • the turbulence-promoting effect in the heat-exchanging plate may in some instances be weaker than expected on account of the low height and divided shape (i.e. not a shape of contiguous projections) of the uneven shape that is formed according to the technology of Patent Literature 2.
  • the uneven shape of Patent Literature 2 moreover, the contact surface area with a medium during condensation of a gas into liquid is small due to the liquid film that forms in the condensation process, and thus the effect of promoting condensation thermal transfer may be weaker than expected.
  • the heat-transfer performance of the heat-exchanging plate that is built into the heat exchanger is lowered by the liquid film that is generated when the heat exchanger is operated.
  • the design of the plate must ensure that the generated liquid film is discharged with good efficiency and that the film is thin.
  • Patent Literature 1 Japanese Unexamined Patent Publication No. 2006-239744
  • Patent Literature 2 Japanese Unexamined Patent Publication No. 2013-76551
  • the plate for a heat-exchanging plate of the present invention is a plate being constituted by a metallic flat plate having fine irregularities formed on a surface thereof, and being obtained through press-working, which is a post-process, of the flat plate, wherein the irregularities include a plurality of projections that are formed at a predetermined spacing; and the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle ⁇ with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges.
  • the method for producing a plate for a heat-exchanging plate of the present invention is a method for producing a plate being constituted by a metallic flat plate having fine irregularities formed on a surface thereof, and being obtained through press-working, which is a post-process, of the flat plate, the method including: forming the irregularities on the surface such that the irregularities include a plurality of projections formed at a predetermined spacing; and forming, when forming the irregularities, the plurality of projections in such a manner that the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle ⁇ with respect to the width direction of the plate, and the projections are formed into V-shapes by the first ridges and the second ridges.
  • FIG. 1 is a diagram illustrating schematically an uneven shape formed on a plate for a heat-exchanging plate according to an embodiment of the present invention.
  • FIG. 2 is a plan-view diagram (enlarged-view diagram of A in FIG. 1 ) illustrating the shape of projections formed on the plate according to the embodiment of the present invention.
  • FIG. 3 is a cross-sectional diagram of FIG. 2 along line III-III.
  • FIG. 4 is a diagram for explaining the dimensions of the uneven shape of the plate according to the embodiment of the present invention.
  • FIG. 5 is a cross-sectional diagram for explaining the dimensions of the shape of the projections formed on the plate according to the embodiment of the present invention, being an enlarged cross-sectional diagram of portion B in FIG. 4 .
  • FIG. 6 is a diagram illustrating data of experiments performed in order to derive a shape parameter.
  • FIG. 7 is a diagram illustrating results of a condensation heat-transfer performance test.
  • FIG. 8 is a diagram illustrating a relationship between a shape parameter of projections formed on a plate and an improvement rate of condensation thermal transfer properties.
  • a plate 1 for a heat-exchanging plate according to the embodiment of the present invention is constituted by a metallic flat plate (for instance, titanium material) having fine irregularities formed on the surface.
  • the plate 1 is subjected to press working, as a post-process, to yield thereafter a heat-exchanging plate (PHE plate).
  • the heat-exchanging plate which exhibits high heat-transfer performance in a condensation thermal transfer process, is built into a heat exchanger or the like.
  • a plurality of projections having for instance a jagged shape generally referred to as herringbone becomes formed on the surface of the heat-exchanging plate through press working of the plate 1 .
  • FIG. 1 is a diagram illustrating schematically the uneven shape formed on the plate 1 before yielding the heat-exchanging plate according to the embodiment of the present invention.
  • the up-and-down direction on the paper is taken as the longitudinal direction or length-wise direction of the plate 1
  • the left-right direction on the paper as the width direction of the plate 1 .
  • FIG. 2 is a plan-view diagram (enlarged-view diagram of portion A of FIG. 1 ) illustrating the shape of projections 2 formed on the plate 1 .
  • FIG. 3 is a cross-sectional diagram along line in FIG. 2 .
  • irregularities are formed on the surface 1 a of the plate before yielding the heat-exchanging plate according to the embodiment of the present invention.
  • the irregularities have a plurality of projections 2 that are formed at a predetermined spacing.
  • the spaces between the plurality of projections 2 constitute recesses 3 .
  • the projections 2 include first ridges 2 a and second ridges 2 b .
  • the first ridges 2 a are disposed at an angle + ⁇ with respect to the width direction of the plate 1 . That is, the first ridges 2 a extend in a rectilinear fashion in a direction at + ⁇ with respect to the width direction of the plate 1 .
  • the second ridges 2 b are disposed at an angle ⁇ with respect to the width direction of the plate 1 . That is, the second ridges 2 b extend in a rectilinear fashion in a direction at ⁇ with respect to the width direction of the plate 1 .
  • the projections 2 are formed into V-shapes by the first ridges 2 a and the second ridges 2 b.
  • first ridges 2 a and the second ridges 2 b are disposed alternately in the width direction of the plate 1 .
  • the ridges are formed in such a manner that an extension line from one end of each of the first ridges 2 a and an extension line from one end of the second ridges 2 b intersect each other.
  • the ridges are formed in such a manner that an extension line from the other end of the first ridges 2 a and an extension line from the other end of the second ridges 2 b intersect each other.
  • first ridges 2 a and the second ridges 2 b adjacent thereto in the projections 2 are formed to a V-shape in a plan view, and respective tops 4 are formed at portions at which the ends of the first ridges 2 a and the ends of the second ridges 2 b intersect each other.
  • first ridges 2 a and the second ridges 2 b are spaced apart from each other, since as described below a groove portion 5 is formed in the tops 4 .
  • the groove portion 5 may be omitted.
  • the first ridges 2 a and the second ridges 2 b connect with each other, whereby the projections 2 are formed to shapes of a repeating plurality of V-shapes.
  • the plurality of first ridges 2 a is disposed at equal spacings in the longitudinal direction of the plate 1
  • the plurality of second ridges 2 b is disposed likewise at equal spacings in the longitudinal direction of the plate 1 .
  • V-shape in the present embodiment denotes a shape such as that of the cutting edges of saw teeth, in a plan view, i.e. a shape in which ridges oriented in different directions are disposed alternately in a continuous succession.
  • the first ridges 2 a extending in a straight line are disposed obliquely with respect to the width direction by the angle + ⁇
  • the second ridges 2 b extending in a straight line are disposed obliquely with respect to the width direction by the angle ⁇ .
  • first ridges 2 a are connected to other first ridges 2 a via the second ridges 2 b
  • the second ridges 2 b are connected to other second ridges 2 b via the first ridges 2 a.
  • the V-shaped projections 2 are formed in plurality that are juxtaposed, in a plan view, at a predetermined spacing in the longitudinal direction of the plate 1 .
  • the V-shaped projections 2 are made up of a plurality of side walls erected in the thickness direction of the plate 1 , and top walls (top edges) that join the respective side walls.
  • the projections 2 in the present embodiment have been explained as having a substantially rectangular shape in a cross-sectional view, but the projections 2 formed on the surface 1 a of the plate 1 may have for instance a substantially trapezoidal shape or substantially angular shape, other than a substantially rectangular shape. That is, the projections 2 may adopt any cross-sectional shape so long as the below-described dimensions of the projections 2 are satisfied.
  • Groove portions 5 are additionally formed in the plate 1 that is used in the heat-exchanging plate according to the embodiment of the present invention. Each groove portion 5 is formed so as to extend along the longitudinal direction of the plate 1 , at the tops 4 at which there intersect the first ridges 2 a and the second ridges 2 b that make up the projections 2 .
  • the groove portion 5 (longitudinal groove portion) formed in the plate is formed so as run rectilinearly through the plurality of tops 4 which are disposed in the length-wise direction on the plate 1 .
  • the groove portion 5 is formed cutting off the tops 4 of the first ridges 2 a and the second ridges 2 b in the projections 2 .
  • any two given recesses 3 positioned flanking a respective projection 2 communicate with each other via the groove portion 5 .
  • the longitudinal groove portion 5 is set to be wider than the recesses 3 (transversal groove portion) formed between the V-shaped projections 2 and projections 2 adjacent thereto.
  • the width of the longitudinal groove portions 5 has been depicted as smaller than the width of the recesses 3 , for convenience.
  • the surface shape of the plate 1 for a heat-exchanging plate is a shape such as that of the draining grooves (tread patterns) that are carved in the contact patch of tires used in automobiles or the like.
  • the transversal groove portions (recesses) 3 are formed so as to open in the width direction with respect to the longitudinal groove portions 5 that are formed in the longitudinal direction of the plate 1 .
  • the plate 1 having the uneven shape, which is formed on the surface 1 a in a case where the plate 1 is used as a heat-exchanging plate, flow of condensate generated in the heat exchanger can be regulated and the condensate can be discharged quickly in the length-wise direction of the plate 1 (heat-exchanging plate) using the longitudinal groove portions 5 , while condensation thermal transfer properties can be enhanced through promotion of turbulence and forced convection.
  • FIG. 4 is a diagram for explaining the dimensions of the uneven shape formed on the plate 1 .
  • FIG. 5 is a diagram for explaining the dimensions of the shape of the projections 2 formed on the plate 1 (enlarged diagram of portion B in FIG. 4 , illustrating a partial cutaway cross-section of portion B).
  • FIG. 6 is a diagram illustrating data of experiments performed in order to derive a shape parameter.
  • FIG. 7 is a diagram illustrating results of a condensation heat-transfer performance test.
  • FIG. 8 is a diagram illustrating a relationship between a shape parameter of the projections 2 formed on the plate 1 and an improvement rate of condensation thermal transfer properties.
  • prescribed dimensions are set for the uneven shape of the surface of the plate 1 .
  • a height h of the projections 2 is set to be 0.02 mm or greater and 0.1 mm or less, and a width Wa of the projections 2 is set to be 0.08 mm or greater and 1 mm or less.
  • the angle ⁇ formed by the projections 2 with respect to the width direction of the plate 1 is set to be 10° or greater and 80° or less.
  • a width Wb of the recesses 3 is set to be 0.1 mm or greater and 1 mm or less.
  • a width Wc of the longitudinal groove portion 5 is set to be 0.5 mm or greater and 500 mm or less.
  • a width pitch P 2 being the pitch between mutually adjacent longitudinal groove portions 5 is set to be 5 mm or greater and 1000 mm or less.
  • the irregularities of the surface 1 a of the plate 1 are formed in such a manner that a shape parameter defined as “height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm)/width pitch P 2 (mm) of the longitudinal groove portions 5 ]” is 0.0025 mm 2 or greater.
  • the inventors of the present application focused on a shape parameter of the uneven shape “height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm)/width pitch P 2 (mm) of the longitudinal groove portions 5 ]” in order to optimize the height h of the projections 2 , the width Wa of the projections 2 , the angle ⁇ of the projections 2 , the width Wb of the recesses 3 , the projection pitch P 1 of adjacent projections 2 , the width Wc of the longitudinal groove portions 5 , and the width pitch P 2 of the adjacent longitudinal groove portions 5 , when producing the plate 1 for a heat-exchanging plate.
  • the inventors of the present application produced a plurality of plates 1 having different dimensions of the uneven shape, and examined an improvement rate on condensation heat-transfer performance of each plate 1 .
  • FIG. 6 there were produced seventeen plates 1 of dissimilar uneven shape dimensions.
  • the plate 1 denoted by number 0 in FIG. 6 there is formed an uneven shape the dimensions whereof include height h of the projections 2 : 0.04 mm, width Wa of the projections 2 : 0.125 mm, width Wb of the recesses 3 : 0.6 mm, projection pitch P 1 of adjacent projections 2 : 0.725 mm, angle ⁇ of the projections 2 : 45°, width Wc of the longitudinal groove portions 5 : 4 mm, and width pitch P 2 of adjacent longitudinal groove portions 5 : 20 mm.
  • a shape parameter “(A ⁇ B):h ⁇ Wb ⁇ [Wc/P 2 ]” of 0.0048 mm 2 is derived from parameters A and B.
  • the plate 1 (number 0) having the above uneven shape exhibited a heat transfer coefficient U, in a heat exchanger, of 1044 (W/m 2 K).
  • the plate 1 (number 0) exhibited an improvement of 16% with respect to the heat transfer coefficient U (900 (W/m 2 K)) of a conventional (smooth-surface) plate (working example).
  • the plate 1 denoted by number 1 in FIG. 6 there is formed an uneven shape the dimensions whereof include height h of the projections 2 : 0.05 mm, width Wa of the projections 2 : 0.1 mm, width Wb of the recesses 3 : 0.4 mm, projection pitch P 1 of adjacent projections 2 : 0.5 mm, angle ⁇ of the projections 2 : 45°, width Wc of the longitudinal groove portions 5 : 4 mm, and width pitch P 2 of adjacent longitudinal groove portions 5 : 13.5 mm.
  • the plate 1 (number 1) having the above uneven shape exhibited an improvement of 20.6% in condensation heat-transfer performance as compared with a conventional plate (working example).
  • the plate 1 (number 2) having the above uneven shape exhibited an improvement of 10% in condensation heat-transfer performance as compared with a conventional plate (working example).
  • the plates 1 denoted by number 3 to number 13 in FIG. 6 exhibited likewise improvements of 5% or more in condensation heat-transfer performance as compared with a conventional plate, similarly to the plate 1 denoted by number 0 to number 2 (working examples).
  • the plate (number 14) having the above uneven shape exhibited merely an improvement of only 3.4% in condensation heat-transfer performance as compared with a conventional plate (comparative example).
  • the shape parameter defined as “height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm)/width pitch P 2 (mm) of the groove portions 5 ]” for irregularities formed on the surface 1 a of the plate must be 0.0025 mm 2 or greater in order to improve the condensation heat-transfer performance of the plate 1 by 5% with respect to conventional instances.
  • the plate 1 for a heat-exchanging plate allows promoting accumulation and discharge of condensate by virtue of the fine uneven shape, being a combination of V-shapes and longitudinal grooves, that are formed on the surface of the plate.
  • the plate 1 according to the embodiment of the present invention allows producing a heat-exchanging plate the condensation heat-transfer performance of which is far superior to that of conventional plates.
  • the plate 1 To produce the plate 1 , first, determination is made on the material, plate thickness and external dimensions of the plate 1 , the shape of the fine irregularities that are formed on the surface 1 a of the plate, as well as the dimensions of the shape, taking into consideration the desired dimensions, plate thickness and so forth of the heat-exchanging plate that is the final product.
  • the shape of the irregularities is prescribed to be a V-shape, and there are prescribed the dimensions of the projections 22 , the dimensions of the recesses 3 , the pitch P 1 of the projections 22 , the dimensions of the longitudinal groove portions 5 and the pitch P 2 of the longitudinal groove portions 5 in the V shape.
  • the height h is set to lie in the range from 0.02 mm to 0.1 mm
  • the width Wa is set to lie in the range from 0.08 mm to 1 mm
  • the angle ⁇ is set to lie in the range from 10° to 80°.
  • the width Wb is set to lie in the range from 0.1 mm to 1 mm.
  • the pitch P 1 between projections 2 and other projections 2 adjacent thereto is set to lie in the range from 0.2 mm to 2 mm.
  • the width Wc is set to lie in the range from 0.5 mm to 500 mm, and the width pitch P 2 between groove portions 5 and other groove portions 5 adjacent thereto is set to be 5 mm or greater and 1000 mm or less.
  • the dimensions of the irregularities are set so that the value derived from the shape parameter defined as “height h (mm) of the projections 2 ⁇ width Wb (mm) of the recesses 3 ⁇ [width Wc (mm)/width pitch P 2 (mm) of the groove portions 5 ]” is 0.0025 mm 2 or greater.
  • a metallic flat plate for instance, titanium material that constitutes the plate 1 is prepared, and the plate 1 is formed to a predetermined size.
  • a lubricating layer formed on the surface 1 a of the plate is removed by a laser processing method, and the portion having had the layer removed therefrom is pickled, to form thereby fine irregularities and produce the plate 1 for a heat-exchanging plate.
  • the production method of the present embodiment is appropriate for producing a plate 1 for a heat-exchanging plate in which a flat plate made of titanium is utilized, but can also be resorted to in order to produce a plate 1 for a heat-exchanging plate in which a plate made of an aluminum alloy or a high-tensile plate is utilized. That is, a plate of any material may be used in the method for producing a plate 1 for a heat-exchanging plate of the present embodiment, so long as the plate is made of metal.
  • the plate for a heat-exchanging plate of the above embodiment is a plate being constituted by a metallic flat plate having fine irregularities formed on a surface thereof, and being obtained through press-working, which is a post-process, of the flat plate, wherein the irregularities include a plurality of projections that are formed at a predetermined spacing; and the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle ⁇ with respect to the width direction of the plate, the projections being formed into V-shapes by the first ridges and the second ridges.
  • a groove portion may be formed along the longitudinal direction of the plate, at respective tops of the V-shapes.
  • the height of the projections may be set to be 0.02 mm or greater and 0.1 mm or less; the width of the projections may be set to be 0.08 mm or greater and 1 mm or less; the value of ⁇ may be set to be 10° or greater and 80° or less; the width of recesses between the projections may be set to be 0.1 mm or greater and 1 mm or less; and the pitch P 1 between adjacent projections may be set to be 0.2 mm or greater and 2 mm or less.
  • the width of the groove portion may be set to be 0.5 mm or greater and 500 mm or less.
  • the groove portion may be formed in plurality, and the width pitch P 2 between adjacent groove portions may be set to be 5 mm or greater and 1000 mm or less.
  • the irregularities of the surface of the plate may be set such that a shape parameter defined as “height (mm) of the projections ⁇ width (mm) of recesses between projections ⁇ [width (mm)/width pitch P 2 (mm) of the groove portions]” is 0.0025 mm 2 or greater.
  • the method for producing a plate for a heat-exchanging plate of the present invention is a method for producing a plate being constituted by a metallic flat plate having fine irregularities formed on a surface thereof, and being obtained through press-working, which is a post-process, of the flat plate, the method including: forming the irregularities on the surface such that the irregularities include a plurality of projections formed at a predetermined spacing; and forming, when forming the irregularities, the plurality of projections in such a manner that the plurality of projections includes first ridges disposed at an angle + ⁇ with respect to the width direction of the plate and second ridges disposed at an angle ⁇ with respect to the width direction of the plate, and the projections are formed into V-shapes by the first ridges and the second ridges.
  • groove portions may be formed along the longitudinal direction of the plate, at respective tops of the V-shapes.
  • the height of the projections may be set to be 0.02 mm or greater and 0.1 mm or less; the width of the projections may be set to be 0.08 mm or greater and 1 mm or less; ⁇ may be set to be 10° or greater and 80° or less; the width of recesses between the projections may be set to be 0.1 mm or greater and 1 mm or less; and the pitch P 1 between adjacent projections may be set to be 0.2 mm or greater and 2 mm or less.
  • the width of the groove portion may be set to be 0.5 mm or greater and 500 mm or less.
  • a width pitch P 2 between adjacent groove portions may be set to be 5 mm or greater and 1000 mm or less.
  • the irregularities of the surface of the plate may be designed such that a shape parameter defined as height (mm) of the projections ⁇ width (mm) of recesses between projections ⁇ [width (mm)/width pitch P 2 (mm) of the groove portions] is 0.0025 mm 2 or greater.
  • the plate for a heat-exchanging plate and the method for producing the plate in the above embodiment allow a liquid film generated during the operation of a heat exchanger to be efficiently discharged, allow forming irregularities such that the thickness of the liquid film is reduced, and allow enhancing heat-transfer performance without collapse of the irregularities.

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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)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US15/120,912 2014-02-27 2015-02-19 Plate for use as heat exchange plate and method for manufacturing such base plate Abandoned US20160363395A1 (en)

Applications Claiming Priority (3)

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JP2014036890A JP6219199B2 (ja) 2014-02-27 2014-02-27 熱交換用プレートとなる元板材、及びその元板材の製造方法
JP2014-036890 2014-02-27
PCT/JP2015/054563 WO2015129539A1 (fr) 2014-02-27 2015-02-19 Matériau de panneau de base destiné à être utilisé comme plaque d'échange de chaleur et procédé de fabrication dudit matériau de panneau de base

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EP (1) EP3104109B1 (fr)
JP (1) JP6219199B2 (fr)
KR (1) KR101889637B1 (fr)
CN (1) CN106030234B (fr)
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CN108332487A (zh) * 2017-01-20 2018-07-27 松下知识产权经营株式会社 冰箱
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
CN109442806B (zh) * 2018-09-03 2020-11-10 广东工业大学 一种分液相变板式换热器及其应用
CN110926256B (zh) * 2019-11-06 2022-03-08 华为数字能源技术有限公司 换热板以及包含该换热板的换热器
CN112179179A (zh) * 2020-09-02 2021-01-05 东南大学 一种用于折线型印刷电路板式换热器的强化传热减阻节能换热板

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US20140352934A1 (en) * 2013-05-28 2014-12-04 Hamilton Sundstrand Corporation Plate heat exchanger
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WO2015129539A1 (fr) 2015-09-03
DK3104109T3 (da) 2021-03-01
CN106030234B (zh) 2018-07-20
KR20160121583A (ko) 2016-10-19
JP6219199B2 (ja) 2017-10-25
KR101889637B1 (ko) 2018-08-17
EP3104109A4 (fr) 2018-01-17
EP3104109A8 (fr) 2017-02-15
RU2650224C2 (ru) 2018-04-11
EP3104109A1 (fr) 2016-12-14
JP2015161449A (ja) 2015-09-07
CN106030234A (zh) 2016-10-12
RU2016138147A (ru) 2018-03-30
RU2016138147A3 (fr) 2018-03-30
EP3104109B1 (fr) 2021-01-06
PL3104109T3 (pl) 2021-06-14

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