US20210310752A1 - Compact gas-gas heat exchange tube and manufacturing and use methods therefor - Google Patents

Compact gas-gas heat exchange tube and manufacturing and use methods therefor Download PDF

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Publication number
US20210310752A1
US20210310752A1 US17/250,815 US201917250815A US2021310752A1 US 20210310752 A1 US20210310752 A1 US 20210310752A1 US 201917250815 A US201917250815 A US 201917250815A US 2021310752 A1 US2021310752 A1 US 2021310752A1
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Prior art keywords
tube
heat transfer
transfer tube
heat
fin set
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US17/250,815
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English (en)
Inventor
Zhiqiang Huang
Kaiyun Zheng
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Shanghai Power Equipment Research Institute Co Ltd
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Shanghai Power Equipment Research Institute Co Ltd
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Assigned to SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE, CO., LTD. reassignment SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE, CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUANG, ZHIQIANG, ZHENG, Kaiyun
Publication of US20210310752A1 publication Critical patent/US20210310752A1/en
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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
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element
    • 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
    • F28F1/14—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 longitudinally
    • F28F1/20—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 longitudinally the means being attachable to the element
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • 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
    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F2001/428—Particular methods for manufacturing outside or inside fins

Definitions

  • the present invention relates to a heat exchange tube for heat transfer, in particular to a compact gas-gas heat exchange tube and methods for manufacturing and using the same, and belongs to the technical field of efficient and compact heat exchangers.
  • heat transfer tubes are basic heat exchange devices and widely applied to shell-and-tube heat exchangers, tube-sheet heat exchangers, finned tube heat exchangers, boilers, tubular heaters, etc.
  • a heat transfer area will become vary large, such that the efficient heat exchange effect can't be realized in limited space, and the requirements of the supercritical carbon dioxide cycle devices in terms of efficiency and size can't be met either.
  • the heat transfer area can be expanded, the heat transfer surface and the heat transfer coefficient may be increased as well, so that the heat exchange performance can be improved.
  • Planes of existing fins of finned tubes are perpendicular to the tubes axially, namely horizontal fins, and the finned tubes belong to incomplete reverse flow exchange.
  • a technical problem to be solved by the present invention is how to realize complete reverse flow efficient heat transfer in a limited space and under a heat exchange working condition of a small logarithmic mean temperature difference.
  • the heat exchange tube includes:
  • a heat transfer tube configured to separate an in-tube fluid from an out-tube fluid, and achieve, through convection and heat conduction manners, heat transfer between the in-tube fluid and the out-tube fluid;
  • an inner fin set configured to expand a heat exchange surface on an inner side of the heat transfer tube to form a micro-channel with an equivalent diameter of 0.5 mm-5 mm, separate the in-tube fluid to make the same to axially flow along the heat transfer tube, and produce a turbulence effect and enhance heat convection as well:
  • an outer fin set configured to expand a heat exchange surface on an outer side of the heat transfer tube, form a micro-channel to restrict the out-tube fluid from axially and reversely flowing along the heat transfer tube, and produce a turbulence effect and enhance heat convection as well,
  • a positioning tube configured to fix the inner fin set is arranged inside the heat transfer tube, the positioning tube being coaxially arranged inside the heat transfer tube, and one end of each fin in the inner fin set being connected to the positioning tube.
  • a fin structure of the inner fin set is in a structure radically extending from a tube center to a tube wall.
  • a fin structure of the inner fin set is in a Y-shaped structure.
  • the inner fin set are metal sheets or metal strips radially parallel to the heat transfer tube, and the inner fin set is connected to an inner wall of the heat transfer tube.
  • the inner fin set are metal sheets or metal strips arranged, around the positioning tube, in a circumferential structure, and surface of the metal sheets or the metal strips is axially parallel to the heat transfer tube.
  • a width of the metal sheets or the metal strips accounts for 1 ⁇ 4-1 of an inner diameter of the heat transfer tube, and a thickness of the metal sheets or the metal strips is 0.2 mm-1.5 mm.
  • the outer fin set are metal sheets or metal strips arranged, around the heat transfer tube, in a circumferential symmetric structure, and surface of the metal sheets or the metal strips is axially parallel to the heat transfer tube.
  • the outer fin set are metal sheets or metal strips radially parallel to the heat transfer tube, and the outer fin set is connected to an outer wall of the heat transfer tube.
  • a width of the metal sheets or the metal strips accounts for 1 ⁇ 4-1 of an inner diameter of the heat transfer tube, and a thickness of the metal sheets or the metal strip is 0.2 mm-3 mm.
  • the hole on each fin of the inner fin set is in random shape, and the hole on each fin of the outer fin set is in random shape.
  • the positioning tube is a hollowed tube.
  • the heat transfer tube is a metal tube which may stand a specified temperature and pressure, and the metal tube may be a tube of any cross section or any profiled tube.
  • the inner fin set and the outer fin set are made to be fixedly connected to the heat transfer tube.
  • the present invention provides a method for manufacturing the above compact gas-gas heat exchange tube.
  • the method includes steps:
  • step 1 forming a heat transfer tube, among which the heat transfer tube is configured to separate an in-tube fluid from an out-tube fluid, and achieve, though convection and heat conduction manners, heat transfer between the in-tube fluid and the out-tube fluid;
  • step 2 arranging an inner fin set on a heat exchange surface on an inner side of the heat transfer tube, providing a hole on each fin of the inner fin set, among which the inner fin set is configured to expand a heat exchange surface on an inner side of the heat transfer tube to form a micro-channel with an equivalent diameter of 0.5 mm-5 mm, separate the in-tube fluid to make the same to axially flow along the heat transfer tube, and produce a turbulence effect and enhance heat convection as well;
  • step 3 arranging an outer fin set on a heat exchange surface on an outer side of the heat transfer tube, providing a hole on each fin of the outer fin set, wherein the outer fin set is configured to expand the heat exchange surface on the outer side of the heat transfer tube, form a micro-channel to restrict the out-tube fluid from axially and reversely flowing along the heat transfer tube, and produce a turbulence effect and enhance heat convection as well.
  • the present invention further provides a method for manufacturing a compact gas-gas heat exchange tube.
  • the method includes steps:
  • step 1 forming a heat transfer tube ( 1 ), wherein the heat transfer tube ( 1 ) is configured to separate an in-tube fluid from an out-tube fluid, and achieve, through convection and heat conduction manners, heat transfer between the in-tube fluid and the out-tube fluid;
  • step 2 arranging a positioning tube ( 4 ) configured to fix an inner fin set ( 3 ) inside the heat transfer tube ( 1 ), the positioning tube ( 4 ) being coaxially arranged inside the heat transfer tube ( 1 );
  • step 3 arranging the inner fin set ( 3 ) on a heat exchange surface on an inner side of the heat transfer tube ( 1 ), connecting one end of each fin in the inner fin set ( 3 ) to the positioning tube ( 4 ), providing a hole on each fin of the inner fin set ( 3 ), wherein the inner fin set ( 3 ) is configured to expand the heat exchange surface on the inner side of the heat transfer tube ( 1 ) to form a micro-channel with an equivalent diameter of 0.5 mm-5 mm, separate the in-tube fluid to make the same to axially flow along the heat transfer tube ( 1 ), and produce a turbulence effect and enhance heat convection as well;
  • step 4 arranging an outer fin set ( 2 ) on a heat exchange surface on an outer side of the heat transfer tube ( 1 ), and providing a hole on each fin of the outer fin set ( 2 ), wherein the outer fin set ( 2 ) is configured to expand the heat exchange surface on the outer side of the heat transfer tube ( 1 ) to form a micro-channel, restrict the out-tube fluid from axially and reversely flowing along the heat transfer tube ( 1 ), and produce a turbulence effect and enhance heat convection as well.
  • the inner fin set ( 3 ) is connected to an inner wall of the heat transfer tube ( 1 ) fixing the outer fin set ( 2 ).
  • the present invention provides a method for using a compact gas-gas heat exchange tube equipped with a positioning tube.
  • the method includes steps: arranging at least one heat transfer tube in a heat exchanger, wherein an in-tube fluid of the heat transfer tube is input through an in-tube fluid inlet end of the heat exchanger, flows, along an inner side of the heat transfer tube, to an outlet end of the heat transfer tube, and then flows to an in-tube fluid outlet end of the heat exchanger, in a flow process, the in-tube fluid of the heat transfer tube is subjected to a heat convection process with an inner fin set and an inner side surface of the heat transfer tube;
  • an out-tube fluid of the heat transfer tube is input through an out-tube fluid inlet end of the heat exchanger, flows, along an outer side of the heat transfer tube, in a direction opposite that of the in-tube fluid of the heat transfer tube, and flows to an out-tube fluid outlet end of the heat exchanger; and in a flow process, the out-tube fluid of the heat transfer tube is subjected to a heat transfer process with the outer side surface of the heat transfer tube and the outer fin set, and a heat conduction process is generated among the outer fin set, the heat transfer tube and the inner fin set.
  • the present invention further provides a method for using the compact gas-gas heat exchange tube equipped with the positioning tube.
  • the method includes steps: arranging at least one heat transfer tube in a heat exchanger, wherein an in-tube fluid of the heat transfer tube is input through an in-tube fluid inlet end of the heat exchanger, flows, along an inner side of the heat transfer tube, to an outlet end of the heat transfer tube, and then flows to an in-tube fluid outlet end of the heat exchanger, in a flow process, the in-tube fluid of the heat transfer tube is subjected to a heat convection process with an inner fin set, the positioning tube and an inner side surface of the heat transfer tube;
  • an out-tube fluid of the heat transfer tube is input from an out-tube fluid inlet end of the heat exchanger, flows, along an outer side of the heat transfer tube, in a direction opposite that of the in-tube fluid of the heat transfer tube, and flows to an out-tube fluid outlet end of the heat exchanger, and in the flow process, the out-tube fluid of the heat transfer tube is subjected to a heat conduction process with an outer side surface of the heat transfer tube and the outer fin set, and a heat conduction process is generated among the outer fin set, the heat transfer tube, the inner fin set and the positioning tube.
  • the in-tube fluid of the heat transfer tube flows through the hole on the fin of the inner fin set and axially flows along the heat transfer tube;
  • the out-tube fluid of the heat transfer tube flows through the hole on the fin of the outer fin set and axially flows along the heat transfer tube;
  • reverse flow heat exchange is performed between the in-tube fluid and the out-tube fluid of the heat transfer tube; a heat exchange surface on an inner side of the heat transfer tube is expanded by the inner fin set, a micro-channel is formed to restrict the in-tube fluid from axially and reversely flowing along the heat transfer tube, and a turbulence effect is produced and heat convection is enhanced as well; and a heat exchange surface on an outer side of the heat transfer tube is expanded by the outer fin set, a micro-channel is formed to restrict the out-tube fluid from axially and reversely flowing along the heat transfer tube, and a turbulence effect is produced and heat convection is enhanced as well.
  • the compact gas-gas heat exchange tube provided by the present invention has the following beneficial effects:
  • the present invention provides the compact gas-gas heat exchanger, which realizes complete reverse flow efficient heat transfer in a limited space and under a heat exchange working condition of a small logarithmich mean temperature difference.
  • Different fin set structures are arranged along an inner surface and an outer surface of the heat transfer tube, thereby achieving a sufficient turbulence effect, improving a heat convection coefficient, and effectively expanding a heat exchange superficial area.
  • the micro-channel with the equivalent diameter of 0.5 mm-5 mm may well achieve improvement of heat transfer efficiency, thereby producing a certain turbulence effect, and sufficiently reducing a weight of the heat transfer tube.
  • the heat exchange tube may be used for manufacturing an efficient and compact heat exchanger, particularly applied to a gas-gas heat exchange working condition or a regenerator.
  • the present invention will provide sufficient effective heat exchange areas and compactly arrange the areas together, thereby saving a spatial size of the apparatus, and reducing a weight of each area as well and therefore reducing a total weight and a manufacturing cost of the apparatus.
  • FIG. 1 is a schematic diagram of a supercritical carbon dioxide cycle system
  • FIG. 2 is a schematic diagram, (a) section view, and (b) front view of an externally-horizontal-fin and internally-vertical-fin compact gas-gas heat exchange tube provided by embodiment 1;
  • FIG. 3 is a schematic diagram, (a) section view, and (b) front view of an externally-horizontal-fin and internally-vertical-fin compact gas-gas heat exchange tube provided by embodiment 2;
  • FIG. 4 is a schematic diagram, (a) section view, and (b) front view of an externally-horizontal-fin and internally-horizontal-fin compact gas-gas heat exchange tube provided by embodiment 3;
  • FIG. 5 is a schematic diagram, (a) section view, and (b) front view of an externally-horizontal-fin and internally-horizontal-fin compact gas-gas heat exchange tube provided by embodiment 4;
  • FIG. 6 is a schematic diagram, (a) section view, and (b) front view of an externally-vertical-fin and internally-vertical-fin compact gas-gas heat exchange tube provided by embodiment 5;
  • FIG. 7 is an expanded schematic diagram of an externally-vertical-fin and internally-vertical-fin circular tube in embodiment 5;
  • FIG. 8 is a schematic diagram. (a) section view, and (b) front view of the externally-vertically-fin and internally-horizontal-fin compact gas-gas heat exchange tube provided by embodiment 6;
  • FIG. 9 is a structural schematic diagram of a micro-channel heat exchanger:
  • FIG. 10 is a structural schematic diagram of a printed circuit board
  • FIG. 11 is an overall schematic diagram of a heat exchanger
  • FIG. 2 is a schematic diagram of a compact gas-gas heat exchange tube provided by this embodiment.
  • the compact gas-gas heat exchange tube includes:
  • an outer fin set 2 which is arranged on a heat exchange surface on an outer side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 0.5 mm, and restrict an out-tube fluid from axially flowing along the heat transfer tube 1 .
  • Each outer fin of the outer fin set 2 are metal sheets which are radically parallel to the heat transfer tube 1 , a width of the metal sheets accounting for 1 ⁇ 4 of an inner diameter of the heat transfer tube 1 , and a thickness is 1 mm.
  • a hole is provided on each fin of the outer fin set 2 , and when the out-tube fluid flows through the outer fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced; and
  • an inner fin set 3 which is arranged on a heat exchange surface on an inner side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 0.5 mm, and separate an in-tube fluid to make the same to axially flow along the heat transfer tube 1 .
  • Each outer fin of the inner fin set 3 are metal sheets which are axially parallel to the heat transfer tube 1 , a width of the metal sheets accounting for 1 ⁇ 4 of an inner diameter of the heat transfer tube 1 , and a thickness being 1 mm.
  • Each fin of the inner fin set 3 forms an end to be connected to a positioning tube 4 , and the other end is in a diffusion shape extending to a tube wall of the heat transfer tube 1 .
  • a hole is provided on each fin of the inner fin set 3 , and when the in-tube fluid flows through the inner fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced.
  • the heat exchange tube is further characterized in one or more points below, which may be combined in any quantity and sequence, for example, one end, extending to an inner wall of the heat transfer tube 1 , of each fin of the inner fin set 3 may be connected to the heat transfer tube 1 , or not, and the positioning tube 4 may be selected from a solid tube or a hollowed tube.
  • FIG. 3 is a schematic diagram of a compact gas-gas heat exchange tube provided by this embodiment.
  • the compact gas-gas heat exchange tube includes:
  • an outer fin set 2 which is arranged on a heat exchange surface on an outer side of a heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 0.5 mm-1 mm, and restrict an out-tube fluid from axially flowing along the heat transfer tube 1 .
  • Each outer fin of the outer fin set 2 are metal strips which are radically parallel to the heat transfer tube 1 , a width of the metal strips accounting for 1 ⁇ 2 of an inner diameter of the heat transfer tube 1 , and a thickness being 0.5 mm.
  • a hole is provided on each fin of the outer fin set 2 , and when the out-tube fluid flows through the outer fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced; and
  • each inner fin of the inners fin set 3 is an Y-shaped metal sheet which is axially parallel to the heat transfer tube 1 , a width of the metal sheet accounting for 1 ⁇ 2 of an inner diameter of the heat transfer tube 1 , and a thickness being 0.5 mm.
  • An end of the inner fin set 3 is connected to a positioning tube 4 , and the other end extends to a tube wall of the heat transfer tube 1 .
  • a hole is provided on each fin of the inner fin set 3 , and when the in-tube fluid flows through the inner fin and the hole on the inner fin, a turbulence effect is produced and heat convection is enhanced.
  • the heat exchange tube is further characterized in one or more points below, which may be combined in any quantity and sequence, for example, one end, extending to an inner wall of the heat transfer tube 1 , of each fin of the inner fin set 3 may be connected to the heat exchange tube 1 , or not, and the positioning tube 4 may be selected from a solid tube or a hollowed tube.
  • FIG. 4 is a schematic diagram of a compact gas-gas heat exchange tube provided by this embodiment.
  • the compact gas-gas heat exchange tube includes:
  • each outer fin of the outer fin set 2 are metal sheets which are radically parallel to the heat transfer tube 1 , a width of the metal sheets accounting for 1 ⁇ 3 of an inner diameter of the heat transfer tube 1 , and a thickness is 1.5 mm.
  • An oval hole is provided on each fin of the outer fin set 2 , and when the out-tube fluid flows through the outer fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced;
  • an inner fin set 3 which is arranged on a heat exchange surface on an inner side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 1 mm, and separate an in-tube fluid to make the same to axially flow along the heat transfer tube 1 .
  • Each fin of the inner fin set 3 are metal sheets which are radically parallel to the heat transfer tube 1 , a width of the metal sheets being same to an inner diameter of the heat transfer tube 1 , and a thickness being 1.5 mm.
  • An oval hole is provided on each fin of the inner fin set 3 , and when the in-tube fluid flows through the inner fin and the hole on the inner fin, a turbulence effect is produced and heat convection is enhanced; and
  • the heat exchange tube is further characterized in one or more points below, which may be combined in any quantity and sequence, for example, one end, extending to an inner wall of the heat transfer tube 1 , of each fin of the inner fin set 3 may be connected to the heat transfer tube 1 , or not, and the holes of each fin of the inner fin set 3 may be symmetrically arranged, or randomly arranged.
  • FIG. 5 is a schematic diagram of a compact gas-gas heat exchange tube provided by this embodiment.
  • the compact gas-gas heat exchange tube includes:
  • an outer fin set 2 which is arranged on a heat exchange surface on an outer side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 2 mm-4 mm, and restrict an out-tube fluid from axially flowing along the heat transfer tube 1 .
  • Each outer fin of the outer fin set 2 are metal sheets which are radically parallel to the heat transfer Lube 1 , a width of the metal sheets accounting for 2 ⁇ 3 of an inner diameter of the heat transfer tube 1 , and a thickness being 0.8 mm.
  • An oval hole is provided on each fin of the outer fin set 2 , and when the out-tube fluid flows through the outer fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced; and
  • an inner fin set 3 which is arranged on a heat exchange surface on an inner side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 2 mm, and separate an in-tube fluid to make the same to axially flow along the heat transfer tube 1 .
  • Each fin of the inner fin set 3 are metal sheets which are radically parallel to the heat transfer tube 1 , a width of the metal sheets being same to an inner diameter of the heat transfer tube 1 , and a thickness being 2.5 mm.
  • a round hole is provided on each fin of the inner fin set 3 , and when the in-tube fluid flows through the inner fin and the hole on the inner fin, a turbulence effect is produced and heat convection is enhanced; and
  • the heat exchange tube is further characterized in one or more points below, which may be combined in any quantity and sequence, for example, one end, extending to an inner wall of the heat transfer tube 1 , of each fin of the inner fin set 3 may be connected to the heat exchange tube, or not, and the holes of each fin of the inner fin set 3 may be symmetrically arranged, or randomly arranged.
  • FIG. 6 is a schematic diagram of a compact gas-gas heat exchange tube provided by this embodiment.
  • the compact gas-gas heat exchange tube includes:
  • an outer fin set 2 which is arranged on a heat exchange surface on an outer side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 3 mm-5 mm, and restrict an out-tube fluid from axially flowing along the heat transfer tube 1 .
  • Each outer fin of the outer fin set 2 are metal sheets which are axially parallel to the heat transfer tube 1 , a width of the metal sheets accounting for 3 ⁇ 4 of an inner diameter of the heat transfer tube 1 , and a thickness being 1.5 mm.
  • a hole is provided on each fin of the outer fin set 2 , and when the out-tube fluid flows through the outer fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced; and
  • an inner fin set 3 which is arranged on a heat exchange surface on an inner side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 1.5 mm, and separate an in-tube fluid to make the same to axially flow along the heat transfer tube 1 .
  • Each fin of the inner fin set 3 are metal sheets which are axially parallel to the heat transfer tube 1 .
  • Each fin of the inner fin set 3 forms an end to be connected to a positioning tube 4 , and the other end is in a diffusion shape extending, from the center to the periphery, to a tube wall of the heat transfer tube.
  • a hole is provided on each fin of the inner fin set 3 , and when the in-tube fluid flows through the inner fin and the hole on the inner fin, a turbulence effect is produced and heat convection is enhanced.
  • FIG. 7 is an expanded schematic diagram of an externally-vertical-fin and internally-vertical-fin circular tube.
  • a represents an equivalent diameter of the inner fin set 3
  • b represents an equivalent diameter of the outer fin set 2
  • t represents a wall thickness of the heat transfer tube 1 .
  • the heat exchange tube is further characterized in one or more points below, which may be combined in any quantity and sequence.
  • One end, extending to an inner wall of the heat transfer tube, of each fin of the inner fin set 3 may be connected to the heat transfer tube, or not, for example: the positioning tube 4 may be selected from a solid tube or a hollowed tube, and the holes of each fin of the outer fin set 2 or the holes of each fin of the inner fin set 3 may be symmetrically arranged, or randomly arranged.
  • FIG. 8 is a schematic diagram of a compact gas-gas heat exchange tube provided by this embodiment.
  • the compact gas-gas heat exchange tube includes:
  • an outer fin set 2 which is arranged on a heat exchange surface on an outer side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 3 mm-5 mm, and restrict an out-tube fluid from axially flowing along the heat transfer tube 1 .
  • Each outer fin of the outer fin set 2 are metal sheets which are radically parallel to the heat transfer tube 1 , a width of the metal sheets being same to an inner diameter of the heat transfer tube 1 , and a thickness being 1.2 mm.
  • a hole is provided on each fin of the outer fin set 2 , and when the out-tube fluid flows through the outer fin and the hole on the outer fin, a turbulence effect is produced and heat convection is enhanced; and
  • an inner fin set 3 which is arranged on a heat exchange surface on an inner side of the heat transfer tube 1 and is configured to form a micro-channel with an equivalent diameter of 1 mm, and separate an in-tube fluid to make the same to axially flow along the heat transfer tube 1 .
  • Each fin of the inner fin set 3 are metal sheets which are radially parallel to the heat transfer tube 1 , a width of the metal sheets being same to an inner diameter of the heat transfer tube 1 , and a thickness being 3 mm.
  • An oval hole is provided on each fin of the inner fin set 3 , and when the in-tube fluid flows through the inner fin and the hole on the inner fin, a turbulence effect is produced and heat convection is enhanced.
  • the heat exchange tube is further characterized in one or more points below, which may be combined in any quantity and sequence, for example, one end, extending to an inner wall of the heat transfer tube, of each fin of the inner fin set 3 may be connected to the heat transfer tube, or not.
  • the holes of each fin of the inner fin set 3 may be symmetrically arranged, or randomly arranged.
  • step 1 forming a heat transfer tube 1 , among which the heat transfer tube 1 is configured to separate an in-tube fluid from an out-tube fluid, and achieve, through convection and heat conduction manners, heat transfer between the in-tube fluid and the out-tube fluid;
  • step 2 arranging an inner fin set 3 on a heat exchange surface on an inner side of the heat transfer tube 1 , among which the inner fin set 3 is configured to expand the heat exchange surface on the inner side of the heat transfer tube 1 to form a micro-channel with an equivalent diameter of 0.5 mm-5 mm, separate the in-tube fluid to make the same to axially flow along the heat transfer tube 1 , and produce a turbulence effect and enhance heat convection as well;
  • step 3 arranging an outer fin set 2 on a heat exchange surface on an outer side of the heat transfer tube 1 , among which the outer fin set 2 is configured to expand the heat exchange surface on the outer side of the heat transfer tube 1 to form a micro-channel, restrict the out-tube fluid from axially and reversely flowing along the heat transfer tube 1 , and produce a turbulence effect and enhance heat convection as well, and
  • the manufacturing method may be combined, in any quantity and sequence, with one or more relevant limits below.
  • a positioning tube 4 configured to fix the inner fin set 3 is arranged inside the heat transfer tube 1 , the positioning tube 4 being coaxially arranged inside the heat transfer tube 1 , and one end of each fin in the inner fin set 3 being connected to the positioning tube 4 .
  • the inner fin set 3 is connected to an inner wall of the heat transfer tube 1 , which fixedly connected to the outer fin set 2 .
  • this embodiment further provides a method for using the above compact gas-gas heat exchange tube.
  • the method includes the following steps:
  • step 1 machining the above heat transfer tube into that with required specifications according to whole design of an heat exchanger, which includes a specification of the heat transfer tube, a specification of the inner fin set and a specification of the outer fin set, and mounting the heat transfer tube as a member, in the heat exchanger (for example, manufacturing it into a tube bundle of a shell-and-tube heat exchanger).
  • middle M is an inner-outer fin zone, where a heat exchange tube with inner and outer fins is used, both ends S are fin-free zones, where fin-free heat exchange tubes are used.
  • Step 2 arranging at least one heat transfer tube 1 in a housing of the shell-and-tube heat exchanger, an in-tube fluid of the heat transfer tube 1 is input through an in-tube fluid inlet end 5 (for example, an inlet of a header of the shell-and-tube heat exchanger) of the heat exchanger, and flows, along an inner side of the heat transfer tube 1 , to an outlet end of the heat transfer tube 1 , during a flow process, the in-tube fluid of the heat transfer tube 1 is subjected to a heat transfer process with an inner side surface of the heat transfer tube 1 ; an out-tube fluid of the heat transfer tube 1 is input from an out-tube fluid inlet end 7 (for example, an inlet of the housing of the shell-and-tube heat exchanger) of the heat exchanger, flows, along an outer side of the heat transfer tube 1 , in a direction opposite that of the in-tube fluid, and flows to an out-tube fluid outlet end 8 of the heat exchanger; an in-tube fluid is input through the in-tube fluid inlet end
  • an in-tube fluid of each heat transfer tube 1 is input through the inlet end (for example, the inlet of the header of the shell-and-tube heat exchanger) of the heat transfer tube 1 , and flows, along the inner side of the heat transfer tube 1 , to the outer end of the heat transfer tube 1 .
  • the in-tube fluid of the heat transfer tube 1 is subjected to heat convection and heat transfer process with the inner fin set of the heat transfer tube 1 , the positioning tube and the inner side surface of the heat transfer tube.
  • the out-tube fluid of the heat transfer tube 1 is input through the out-tube fluid inlet end (for example, the inlet of the housing of the shell-and-tube heat exchanger) of the heat exchanger, flows, along the outer side of the heat transfer tube 1 , in a direction opposite that of the in-tube fluid of the heat transfer tube 1 , and flows to the out-tube fluid outlet end of the heat exchanger.
  • the out-tube fluid flows through the hole on the fin of the outer fin set, and axially flow along the heat transfer tube 1 .
  • the out-tube fluid is subjected to the heat transfer process with the outer side surface of the heat transfer tube 1 and the outer fin set, and a heat transfer process is performed among the outer fin set, the heat transfer tube and the inner fin set and the positioning tube.
  • FIG. 9 is a structural schematic diagram of a micro-channel heat exchanger.
  • c represents a horizontal equivalent diameter of a micro-channel heat exchanger
  • d represents a vertical equivalent diameter of the micro-channel heat exchanger.
  • FIG. 10 is a structural schematic diagram of a printed circuit board.
  • e represents an equivalent diameter of a printed circuit board type heat exchanger.
  • an equivalent diameter of 2 mm and the same unit size are taken as an example for calculating a compact degree of three structures of heat exchangers, which is represented by a superficial area, namely a surface density (m2/m3), of a solid in contact with gas in a unit size:
  • FIG. 10 is FIG. 9 is a a printed FIG. 7 is a structure of an micro-tube circuit board- inner-outer-fin tube structure type structure Not perforated Perforated 1099 m 2 /m 3 1058 m 2 /m 3 900 m 2 /m 3 1200-1500 m 2 /m 3
  • the heat exchanger apparatus manufactured by the present invention may achieve a smaller contour size and a smaller weight.

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  • 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)
  • Fuel Cell (AREA)
US17/250,815 2018-09-05 2019-08-30 Compact gas-gas heat exchange tube and manufacturing and use methods therefor Pending US20210310752A1 (en)

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CN201811030768.8A CN109059601A (zh) 2018-09-05 2018-09-05 一种紧凑型气体-气体换热管及其制造和使用方法
CN201811030768.8 2018-09-05
PCT/CN2019/103749 WO2020048401A1 (zh) 2018-09-05 2019-08-30 一种紧凑型气体-气体换热管及其制造和使用方法

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EP (1) EP3848664A4 (ja)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114575785A (zh) * 2022-05-06 2022-06-03 四川安硕石油工程技术服务有限公司 油气井超临界二氧化碳压裂用井口加热装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107976101B (zh) * 2017-12-22 2023-07-14 上海发电设备成套设计研究院有限责任公司 一种外翅片换热管的使用方法
CN109059601A (zh) * 2018-09-05 2018-12-21 上海发电设备成套设计研究院有限责任公司 一种紧凑型气体-气体换热管及其制造和使用方法
CN110296609A (zh) * 2019-05-23 2019-10-01 江苏华冶钙业有限公司 一种氧化钙煅烧炉的烟气中央处理系统
CN112487681B (zh) * 2020-11-30 2022-05-17 北京航空航天大学 一种考虑制造约束的阵列微流道换热器性能优化方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923003A (en) * 1982-12-29 1990-05-08 Hypeco Ab Heat exchanger
CN201954999U (zh) * 2011-03-04 2011-08-31 杭州杭氧换热设备有限公司 开孔平直高效内翅换热管

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1469689A (fr) * 1965-02-23 1967-02-17 Brown Fintube Co Tube à ailettes et son procédé de fabrication
JPS5258855U (ja) * 1975-10-28 1977-04-28
JPS5756077Y2 (ja) * 1976-07-13 1982-12-03
JPS59125391A (ja) * 1983-01-07 1984-07-19 Matsushita Electric Ind Co Ltd 熱交換器
JP2002350092A (ja) * 2001-05-28 2002-12-04 Kawasaki Heavy Ind Ltd 熱交換器とこれを用いたガスタービン装置
KR20030097212A (ko) * 2002-06-20 2003-12-31 서울금속산업주식회사 이중관의 열교환기를 갖는 보일러
KR100752635B1 (ko) * 2006-05-02 2007-08-29 삼성광주전자 주식회사 냉장고용 열교환기
CN201344755Y (zh) * 2009-01-13 2009-11-11 胡琪 内纵外横高翅换热管
CN201434621Y (zh) * 2009-07-14 2010-03-31 西安石油大学 传热管外流体多股螺旋流壳管式换热器
DE112012001057B4 (de) * 2011-03-01 2022-09-29 Dana Canada Corporation Koaxialer Gas/Flüssigkeits-Wärmetauscher mit thermischem Expansionsverbinder
JP6067094B2 (ja) * 2013-02-19 2017-01-25 三菱電機株式会社 熱交換器、及び、それを用いた冷凍サイクル装置
KR20150053833A (ko) * 2013-11-07 2015-05-19 신상용 핀 파이프형 열교환기
CN105605960B (zh) * 2015-12-23 2017-06-30 山东大学 一种内翅片连通的扁平换热管
KR101864983B1 (ko) 2017-01-24 2018-06-05 두산중공업 주식회사 초임계 이산화탄소 발전 시스템
CN109059601A (zh) * 2018-09-05 2018-12-21 上海发电设备成套设计研究院有限责任公司 一种紧凑型气体-气体换热管及其制造和使用方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4923003A (en) * 1982-12-29 1990-05-08 Hypeco Ab Heat exchanger
CN201954999U (zh) * 2011-03-04 2011-08-31 杭州杭氧换热设备有限公司 开孔平直高效内翅换热管

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114575785A (zh) * 2022-05-06 2022-06-03 四川安硕石油工程技术服务有限公司 油气井超临界二氧化碳压裂用井口加热装置

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WO2020048401A1 (zh) 2020-03-12
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EP3848664A4 (en) 2021-11-17
CN109059601A (zh) 2018-12-21
KR20210046045A (ko) 2021-04-27
KR102559356B1 (ko) 2023-07-24

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