Classifications

• • 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
  • F28D7/10—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 one within the other, e.g. concentrically
  • F28D7/106—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 one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
• • 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
  • F28D7/10—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 one within the other, e.g. concentrically
  • F28D7/103—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 one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
• • 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
  • F28F1/02—Tubular elements of cross-section which is non-circular
  • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
• • 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
  • F28F1/105—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being corrugated elements extending around the tubular elements
• • 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
  • F28F1/126—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 consisting of zig-zag shaped fins
• • 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
  • F28F1/34—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 obliquely
  • F28F1/36—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 obliquely the means being helically wound fins or wire spirals
• • 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

Definitions

• a tube for exchangers, filled with a heat-exchange surface having the shape of fins is known from the patent US6533030. Further, heat exchangers are known that are filled with a honeycomb-shaped structure.
• the Japanese patents JPH02150691 and JPS62288495 can be mentioned as an example.
• the object of the invention is to adapt known "tube-in-tube” exchangers to achieve a considerable weight reduction and an increase of the exchanger output.
• the tube profiles do not primarily form a heat exchange surface, but a piece of the exchanger that separates the media so the tube profiles can be sized to the respective pressure difference and the exchanger according to the invention can be used for almost any media pressure difference. Since the thermal conductive structure can have a thickness of tens of micrometers regardless of the media pressures while the thickness of the wall and possible fins in finned tubes of known exchangers is on the orders of millimeters, i.e. 2 orders thicker, the weight of the exchanger according to the invention is considerably lower at the same output.
• the tube profiles can have in principle any cross-section, especially circular, oval, or rectangular.
• the thermal conductive structure preferably fills the tube profiles completely.
• FIG. 1 schematically shows a cross-section of the first example of an annular heat exchanger according to the invention.
• Fig. 2 shows a detail of the design of the thermal conductive structure in the area of the inner profile.
• Figs. 3, 4, 5 and 6 show other embodiments of annular heat exchanger according to the invention.
• An embodiment of an annular heat exchanger according to Fig. 1 comprises three concentrically arranged tube profiles for media flow, namely the outer profile 1, inner profile 2 and central profile 7.
• the tube profiles 1 , 2, 7 consist of tubes with a circular cross-section
• the intermediate spaces between these profiles 1 , 2, 7 are completely filled with a thermal conductive structure 3 that is composed of a helically tightly wound pair of bands 4, 5 of aluminum sheet with the thickness of 0,05mm, lying on each other.
• the first band 4 is smooth while the other band 5 is corrugated transversally to the winding direction to produce flow channels 6 (see Fig. 2).
• the embodiment of an annular heat exchanger according to Fig. 3 only differs from the embodiment of Fig. 1 in that it does not have a central profile 7 and that the entire inner profile 2 is completely filled by the thermal conductive structure 3.
• Figs. 5 and 6 show examples of exchangers whose tube profiles 1 , 2 have a rectangular cross-section. A skilled person will find it obvious that the profiles 1 , 2, 7 can virtually have any cross-section with enclosed circumference.
• the annular heat exchanger according to the present invention can be connected as a counter-current or co-current exchanger with any number of inserted profiles 1 , 2, 7.
• the exchanger can also be used for liquid/liquid media, but its benefits are maximally manifested when used for gas/gas and gas/liquid media and in applications with a high pressure difference at the hot and cold side (steam generators, recuperators of combustion turbines, condensers, evaporators).
• Hot medium is supplied to the space between the inner profile 2 and the central profile 7 where the medium transfers heat by convection into the thermal conductive structure 3.
• the thermal conductive structure 3 conducts this heat to the tube that forms the inner profile 2 and subsequently the heat is conducted to the thermal conductive structure 3 that fills the space between the inner profile 2 and the outer profile 1. In this space, the thermal conductive structure 3 transfers heat by convection into the colder medium that flows in this space. The motion of heat is indicated with arrows in Fig. 2.
• the annular heat exchanger according to the present invention is based on 5 combined heat exchange when thermal convection has the same importance as thermal conduction. Its heat transfer surface is maximized by insertion of the thermal conductive structure 3 described above. Heat transfer into this thermal conductive structure 3 and the subsequent thermal conduction by this thermal conductive structure 3 to the separating wall of the respective profile 1 , 2, 7 are l o equally used for the heat exchange. Thus, thermal conduction by the thermal conductive structure 3 is applied to a considerably higher extent, being equally important as thermal convection in the exchanger based on the present invention.
• Individual thermal conductive structures 3 are separated from each other by the 15 respective tube profiles 1 , 2, 7, which work as a heat exchange surface in standard exchangers, but in the inventive exchanger they predominantly act as media separators.
• the exchanger based on the present invention can be used for virtually any pressure difference of media.
• the tube profiles 1 , 2, 7 do not primarily form a heat-exchange surface, but a media-separating part of the exchanger. Since the thermal conductive structure can have a thickness of tens of micrometers regardless of the media pressures while the thickness of the 25 wall and possible fins in finned tubes of known exchangers is on the orders of millimeters, i.e. 2 orders thicker, the weight of the exchanger according to the invention is considerably lower at the same output.
• a comparison calculation utilizing a numerical model in the ANSYS CFD program 30 was used to compare the heat output transferred by a 50-mm aluminum tube with the diameter of 20 mm in four versions, simulating 4 different types of exchangers:

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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)

Priority Applications (12)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (14)

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Citations (7)

Family Cites Families (12)

• 2017
  • 2017-02-09 CZ CZ2017-77A patent/CZ201777A3/cs unknown
• 2018
  • 2018-02-05 EP EP18708568.3A patent/EP3580514B1/en active Active
  • 2018-02-05 PL PL18708568T patent/PL3580514T3/pl unknown
  • 2018-02-05 KR KR1020197021799A patent/KR20190116277A/ko not_active Application Discontinuation
  • 2018-02-05 US US16/482,670 patent/US20190353428A1/en not_active Abandoned
  • 2018-02-05 ES ES18708568T patent/ES2841826T3/es active Active
  • 2018-02-05 RU RU2019122167A patent/RU2019122167A/ru unknown
  • 2018-02-05 CA CA3049295A patent/CA3049295C/en active Active
  • 2018-02-05 UA UAA201907579A patent/UA124277C2/uk unknown
  • 2018-02-05 WO PCT/CZ2018/000008 patent/WO2018145674A1/en active Search and Examination
  • 2018-02-05 CN CN201880008242.1A patent/CN110214256A/zh active Pending
  • 2018-02-05 DK DK18708568.3T patent/DK3580514T3/da active
  • 2018-02-05 JP JP2019564575A patent/JP2020507740A/ja active Pending
  • 2018-02-05 BR BR112019012305A patent/BR112019012305A2/pt not_active Application Discontinuation

Patent Citations (7)

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