US20190353428A1 - Annular heat exchanger - Google Patents

Annular heat exchanger Download PDF

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Publication number
US20190353428A1
US20190353428A1 US16/482,670 US201816482670A US2019353428A1 US 20190353428 A1 US20190353428 A1 US 20190353428A1 US 201816482670 A US201816482670 A US 201816482670A US 2019353428 A1 US2019353428 A1 US 2019353428A1
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US
United States
Prior art keywords
tube
thermal conductive
conductive structure
heat exchanger
annular 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.)
Abandoned
Application number
US16/482,670
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English (en)
Inventor
Pavel Sumera
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.)
SuarCz SRO
Original Assignee
SuarCz SRO
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
Application filed by SuarCz SRO filed Critical SuarCz SRO
Assigned to SUAR.CZ s.r.o. reassignment SUAR.CZ s.r.o. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUMERA, Pavel
Publication of US20190353428A1 publication Critical patent/US20190353428A1/en
Abandoned legal-status Critical Current

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    • 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

  • the invention relates to an annular heat exchanger comprising at least two circumferentially enclosed tube profiles arranged inside each other for media flow and having a thermal conductive structure arranged inside.
  • Heat exchangers comprised of at least two tubes for media flow arranged inside each other are sometimes referred to as “tube-in-tube” exchangers.
  • the tube in “tube-in-tube” exchangers has two principal functions—it separates the media and at the same time serves as a heat-exchange surface. Thermal convection from the media to the heat exchanger material is decisive for the exchange of heat, while thermal conduction is present to a minimal extent, just by the tube wall.
  • the heat exchange surface can be increased by finning.
  • the fins are part of the tube and have a thickness on the order of mm. In this case, both thermal convection and thermal conduction are partly present, but thermal convection is still decisive.
  • Finning increasing of the heat exchange surface is used unilaterally—inside or outside.
  • a tube for exchangers, filled with a heat-exchange surface having the shape of fins is known from the patent U.S. Pat. No. 6,533,030.
  • heat exchangers are known that are filled with a honeycomb-shaped structure.
  • the Japanese patents JPH02150691 and JPS62288495 can be mentioned as an example.
  • rotary regenerative heat exchangers made e.g. by the company KASST are known, which use the condenser principle, which means that they are cyclically charged and after the charged part of the heat exchange surface is turned to a place with a lower temperature they are discharged again.
  • This is quite a different functional principle from that of “tube-in-tube” exchangers from the technical point of view.
  • 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 said object is achieved through an annular heat exchanger comprising at least two circumferentially enclosed tube profiles arranged inside each other for media flow and having a thermal conductive structure arranged inside according to the invention, the principle of which is that the thermal conductive structure comprises a helically tightly wound pair of bands lying on each other, the first band being smooth, the other band being corrugated transversally to the winding direction to create flow channels.
  • An advantage of the invention is that the individual thermal conductive structures are separated from each other by the respective tube profiles which work as a heat exchange surface in standard exchangers, but in the inventive exchanger they predominantly act as media separators.
  • 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 0.05 mm, 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 ).
  • annular heat exchanger 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).
  • annular heat exchanger The function of an annular heat exchanger according to the present invention will be described using the embodiment shown in FIGS. 1 and 2 .
  • the other embodiments work in an analogous way.
  • 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 .
  • 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 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 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 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 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 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:

Landscapes

  • 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)
US16/482,670 2017-02-09 2018-02-05 Annular heat exchanger Abandoned US20190353428A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CZPV2017-77 2017-02-09
CZ2017-77A CZ201777A3 (cs) 2017-02-09 2017-02-09 Prstencový výměník tepla
PCT/CZ2018/000008 WO2018145674A1 (en) 2017-02-09 2018-02-05 An annular heat exchanger

Publications (1)

Publication Number Publication Date
US20190353428A1 true US20190353428A1 (en) 2019-11-21

Family

ID=69738387

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/482,670 Abandoned US20190353428A1 (en) 2017-02-09 2018-02-05 Annular heat exchanger

Country Status (14)

Country Link
US (1) US20190353428A1 (cs)
EP (1) EP3580514B1 (cs)
JP (1) JP2020507740A (cs)
KR (1) KR20190116277A (cs)
CN (1) CN110214256A (cs)
BR (1) BR112019012305A2 (cs)
CA (1) CA3049295C (cs)
CZ (1) CZ201777A3 (cs)
DK (1) DK3580514T3 (cs)
ES (1) ES2841826T3 (cs)
PL (1) PL3580514T3 (cs)
RU (1) RU2019122167A (cs)
UA (1) UA124277C2 (cs)
WO (1) WO2018145674A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115285939A (zh) * 2022-08-24 2022-11-04 北京石油化工学院 一种生物乙醇自热重整制氢系统

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US2589262A (en) * 1946-06-12 1952-03-18 Hydrocarbon Research Inc Heat exchanger
CH402027A (de) * 1962-07-11 1965-11-15 Escher Wyss Ag Röhrenwärmeaustauscher
JPS5187852A (cs) * 1974-12-24 1976-07-31 Breda Backer Rueb Maschf
JPS51116445A (en) * 1975-04-04 1976-10-13 Daikin Ind Ltd A dual-tube type heat exchanger and manufacturing process thereof
US4096616A (en) * 1976-10-28 1978-06-27 General Electric Company Method of manufacturing a concentric tube heat exchanger
DD133356A1 (de) * 1977-10-26 1978-12-27 Werner Heinig Spiralwaermeuebertrager
US4284133A (en) * 1979-09-19 1981-08-18 Dunham-Bush, Inc. Concentric tube heat exchange assembly with improved internal fin structure
JPS57165973U (cs) * 1981-04-04 1982-10-19
DE3331186A1 (de) * 1983-08-30 1985-03-14 Spiro Research B.V., Helmond Heizungsrohr mit eckigem bedrahtungsprofil
JPS62288495A (ja) 1986-06-03 1987-12-15 Sumitomo Metal Ind Ltd 熱交換器
JPH02150691A (ja) 1988-11-30 1990-06-08 Kyocera Corp ハニカム熱交換器とその製法
JPH04335993A (ja) * 1991-05-10 1992-11-24 Toyo Radiator Co Ltd オイルクーラ
US5735342A (en) * 1996-05-17 1998-04-07 Nitta; Minoru Heat exchanger
DE19909368C1 (de) * 1999-03-03 2000-08-10 Hde Metallwerk Gmbh Wärmetauscherrohr
EP1136780A3 (en) * 2000-03-23 2002-11-06 Senior Investments AG Pipe within pipe heat exchanger construction
DE10038624C2 (de) 2000-08-03 2002-11-21 Broekelmann Aluminium F W Wärmeübertragungsrohr mit gedrallten Innenrippen
JP2003307396A (ja) * 2002-04-16 2003-10-31 Usui Kokusai Sangyo Kaisha Ltd フィンチューブ
CA2450312A1 (en) * 2003-11-21 2005-05-21 Dana Canada Corporation Tubular charge air cooler
US20060081362A1 (en) * 2004-10-19 2006-04-20 Homayoun Sanatgar Finned tubular heat exchanger
FR2887020B1 (fr) * 2005-06-09 2007-08-31 Air Liquide Echangeur de chaleur a plaques avec structure d'echange formant plusieurs canaux dans un passage
CN100516756C (zh) * 2006-09-18 2009-07-22 西安交通大学 一种套管式金属泡沫换热器
CN101334248B (zh) * 2008-07-15 2011-06-01 西安石油大学 纵向螺旋内翅片管
CN201392115Y (zh) * 2009-03-17 2010-01-27 铜联商务咨询（上海）有限公司 一种套管式高效泡沫金属换热器
CN104930878A (zh) * 2015-05-20 2015-09-23 苏州锦珂塑胶科技有限公司 一种热交换器及热能回收装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115285939A (zh) * 2022-08-24 2022-11-04 北京石油化工学院 一种生物乙醇自热重整制氢系统

Also Published As

Publication number Publication date
RU2019122167A3 (cs) 2021-03-09
UA124277C2 (uk) 2021-08-18
CZ307349B6 (cs) 2018-06-20
EP3580514A1 (en) 2019-12-18
CN110214256A (zh) 2019-09-06
JP2020507740A (ja) 2020-03-12
KR20190116277A (ko) 2019-10-14
CZ201777A3 (cs) 2018-06-20
PL3580514T3 (pl) 2021-06-14
EP3580514B1 (en) 2020-12-09
DK3580514T3 (da) 2021-01-11
BR112019012305A2 (pt) 2019-11-12
RU2019122167A (ru) 2021-03-09
CA3049295C (en) 2022-12-06
ES2841826T3 (es) 2021-07-09
CA3049295A1 (en) 2018-08-16
WO2018145674A1 (en) 2018-08-16

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