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WO1999023435A1 - Procede de production ameliore d'une cellule de recuperateur - Google Patents

Procede de production ameliore d'une cellule de recuperateur Download PDF

Info

Publication number
WO1999023435A1
WO1999023435A1 PCT/US1998/023269 US9823269W WO9923435A1 WO 1999023435 A1 WO1999023435 A1 WO 1999023435A1 US 9823269 W US9823269 W US 9823269W WO 9923435 A1 WO9923435 A1 WO 9923435A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
primary surface
surface sheets
bar
cell
Prior art date
Application number
PCT/US1998/023269
Other languages
English (en)
Inventor
Douglas R. Ervin
Thomas L. Grigsby
Leonard Holman
Original Assignee
Solar Turbines Incorporated
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 Solar Turbines Incorporated filed Critical Solar Turbines Incorporated
Publication of WO1999023435A1 publication Critical patent/WO1999023435A1/fr

Links

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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
    • F28D9/0018—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form without any annular circulation of the heat exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/32—Application in turbines in gas turbines

Definitions

  • This invention relates generally to a primary surface heat exchanger and more particularly to a method of making a plurality of cell used to form the primary surface heat exchanger.
  • recuperator for a gas turbine engine must be capable of operating at temperatures of between about 500 degrees C. and 800 degrees C. and internal pressures of between approximately 140 kPa and 1400 kPa under operating conditions involving repeated starting and stopping cycles.
  • recuperators include a core which is commonly constructed of a plurality of relatively thin flat sheets having an angled or corrugated spacer fixedly attached therebetween.
  • the sheets are joined into cells, sealed and form passages between the sheets.
  • These cells are stacked or rolled and form alternate air (recipient) cells and hot exhaust (donor) cells.
  • Compressed discharged air from a compressor of the engine passes through the air cell while hot exhaust gas flows through alternate cells .
  • the exhaust gas heats the sheets and the spaces, and the compressor discharged air is heated by conduction from the sheets and spacers.
  • Darragh discloses a heat exchanger having been used to increase the efficiency of engine by absorbing heat from the exhaust gases and transferring a portion of the exhaust heat to the combustion air.
  • the heat exchanger is built-up from a plurality of performed involute curved cells stacked in a circular array to provide flow passages and for the donor fluid and the recipient fluid respectively.
  • recuperators used with gas turbine engines have structures in which very high stresses are induced.
  • recuperators must operate at temperatures of between about 500 degrees C. and 800 degrees C. and internal pressures of between approximately 140 kPa and 1400 kPa . Under normal operating conditions repeated starting and stopping cycles are common. Many of the starts are considered to be hot starts. With the hot donor fluid being at a temperatures of between about 500 degrees C. and 800 degrees C. and the recipient fluid being near an atmospheric temperatures of between about 0 degrees C. and 60 degrees C, the thermal difference or gradients experienced by the recuperator is extremely high. Thus, the thermal stress induced in also extremely high.
  • the present invention is directed to overcoming one or more of the problems as set forth above .
  • a recuperator is formed by a plurality of cells.
  • Each of the plurality of cells is comprised of a pair of primary surface sheets.
  • Each of the pair of primary surface sheets has a donor side and a recipient side, a base edge defining a pair of ends, an outer edge being spaced from the base edge and defining a pair of ends, and a pair of extension edges extending between the respective pair of ends.
  • Each of the pair of primary surface sheets further has a center portion extending between the base edge and the outer edge and has a wing portion interposed the center portion and each of the pair of extension edges.
  • a plurality of spacer bars has one of the plurality of spacer bars positioned at the outer edge on the donor side of one of the pair of primary surface sheets and another one of the plurality of spacer bars positioned at the base edge on the donor side of the same one of the pair of primary surface sheets.
  • Each of the plurality of spacer bars is of a unitary construction.
  • a "U" bar is positioned along the outer edge and the pair of extension edges on the recipient side of the one of the pair of primary surface sheets.
  • the "U” bar is of a unitary construction.
  • a pair of guide strips are positioned within the wing portion on the recipient side of the one of the pair of primary surface sheets.
  • a second one of the pair of primary surface sheets has one of the plurality of spacer bars positioned at the outer edge on the donor side of one of the pair of primary surface sheets and another one of the plurality of spacer bars is positioned at the base edge on the donor side of the same one of the pair of primary surface sheets.
  • Each of the plurality of spacer bars is of a unitary construction.
  • the second one of the primary surface sheets is positioned symmetrically about the one of the primary surface sheets.
  • the recipient sides are positioned facing one another.
  • a second pair of guide strips are positioned within the wing portion on the donor side of the second one of the pair of primary surface sheets.
  • a cell is comprised of a pair of primary surface sheets.
  • Each of the primary surface sheets have a base edge defining a pair of ends, an outer edge being spaced from the base edge and defining a pair of ends, and a pair of extension edges extending between the respective pair of ends.
  • Each of the primary surface sheets further have a center portion extending between the base edge and the outer edge and have a wing portion interposed the center portion and each of the pair of extension edges.
  • the cell is further comprised of a spacer bar positioned along the base edge and have a length corresponding to the base edge of the center portion.
  • the spacer bar is of a unitary construction.
  • the cell is further comprised of a "U" bar positioned along the outer edge and the pair of extension edges.
  • the "U" bar is of a unitary construction.
  • FIG. 1 is a sectional view of a heat exchanger of recuperator embodying the present invention
  • FIG. 2 is an enlarged sectional view of a cell taken along line 2-2 of FIG. 1;
  • FIG. 3 is an enlarged cross-sectional view of the cell taken along line 3-3 of FIG. 1 showing the recipient side of the cell;
  • FIG. 4 is an enlarged cross-sectional view of the cell taken along line 4-4 of FIG. 1 showing the donor side of a cell
  • FIG. 5 is an enlarged cross-sectional view taken along line 5-5 of FIG. 3;
  • FIG. 6 is profile view of a single piece "U” bar ; and FIG. 7 is an enlarged cross-sectional view taken along line 7-7 of FIG. 6.
  • a heat exchanger or recuperator 6 includes a plurality of individual cells 8 fixedly attached to form the recuperator 6 which in this application has a circular construction.
  • the recuperator 6 defines an inner diameter 10 and an outer diameter 12.
  • the plurality of cells 8 are formed and have either a passage 14 for donor fluid to flow therethrough contacting a donor side 16 or a passage 18 for recipient fluid to flow therethrough contacting a recipient side 20.
  • the passage 14,18 are alternately positioned within the circular recuperator 10.
  • each of the plurality of cells 8 have an involute configuration.
  • Each of the plurality of individual cells 8 is formed of a pair of primary surface sheet 22 and a pair of guide strips 24.
  • each of the plurality of individual cells is further formed of a plurality of spacer bars 26 and a "U" bar 28.
  • the pair of primary surface sheets 22 are generally identical in configuration.
  • Each of the pair of primary surface sheets 22 includes a base edge 30 having a preestablished length defining a pair of ends 32.
  • An outer edge 34 is spaced from the base edge 30.
  • the outer edge 34 is defined on each of the pair of primary surface sheets 22 has a preestablished length and defines a pair of ends 36 positioned opposite the base edge 30.
  • the outer edge 34 is generally parallel with the base edge 30 and has the preestablished length being less than the preestablished length of the base edge 30. Extending between the base edge 30 and the outer edge 34 and connecting corresponding ones of the pair of ends 32,36 are a pair of extension edges 38.
  • Each of the pair of primary surface sheets 22 includes a center portion 40 extending between the base edge 30 and the outer edge 34. Interposed the center portion 40 and each of the pair of extension edges 38 is a wing portion 42.
  • the center portion 40 has a generally rectangular configuration and the wing portions 42 have a generally triangular configuration.
  • the center portion 40 includes a plurality of pleats 44 defining a peak 46 and a valley 48 and the wing portions 42 are flat or have been flattened, void of the peaks 46 and valleys 48.
  • the pair of guide strips 24 have a distinct geometric configuration which in this application is of a different configuration or construction depending on which side the cell 8 the pair of guide strips 24 are positioned.
  • the guide strip 24 used in conjunction with the donor side 16 and the recipient side 20 have a generally common triangular configuration defining a base 50, a height 52 and a hypotenuse 54.
  • the guide strips 24 for the donor side 16 when viewed through a cross-section thereof defines an axial portion 56 which extends from the height 52.
  • a first extension member 58 extends from the axial portion 56 and a top portion 60 extends axially from the extension member 58.
  • the top portion 60 is generally parallel with the axial portion 56 and a second extension member 62 extends from the top portion 60 toward a second repletion of the axial portion 56 etc.
  • the guide strips 24 for the recipient side 20 when viewed through a cross-section thereof defines an axial portion 80 extending from the base 50.
  • a first extension member 82 extends from the axial portion 80 and a top portion 84 extends axially from the first extension member 82.
  • the top portion 84 is generally parallel with the axial portion 80 and a second extension member 86 extends from the top portion 84 toward a second repletion of the axial portion 80 etc.
  • the plurality of spacer bars 26 are made of a first preestablished thickness "Tl” and a second preestablished thickness "T2" being greater than that of the first preestablished thickness "Tl” .
  • Tl first preestablished thickness
  • T2 second preestablished thickness
  • the plurality of spacer bars 26 vary in length.
  • the spacer bars 26 having the first preestablished thickness "Tl” are positioned near the outer edge 34 on the donor side 16 of the pair of primary surface sheets 22.
  • the spacer bars 26 having the second preestablished thickness "T2" being positioned near the base edge 30 on the recipient side 20 of the pair of primary surface sheets 22.
  • the "U” bar 28 has a single preestablished thickness being equivalent to that of the second preestablished thickness "T2" and, in this application, is positioned on the recipient side 20 of the pair of primary surface sheets 22.
  • the "U” bar 28 has a preestablished thickness "T2” and a preestablished width " " , as is best shown in FIG. 7.
  • the "U” bar 28 is as thick as the second preestablished thickness "T2" of the spacer bars 26 and is about twice the thickness as the first preestablished thickness "Tl” of the spacer bars 26.
  • the "U" bar 28 further includes a base 90 and a pair of legs 92 extending from the base 90.
  • the pair of legs 92 define a first end portion 94 having a preestablished configuration and a second end portion 96 attached to the base 90. Interposed the base 90 and the second end portion 96 of the pair of legs 92 is a radiused portion 98 forming a uniform transition between the base 90 and the pair of legs 92.
  • the pair of legs 92 join with the base 90 and extend therefrom at an included angle of about 105 degrees.
  • the first end portion 94 is cut or trimmed to form an angled end 100.
  • the angled end 100 is about 15 degrees.
  • the angled end 100 could be other than a 15 degree angle and could be a 90 degree angle or a square end.
  • the individual cells 8 have a passage 18 for the recipient fluid to flow therethrough.
  • the passage 18 of the individual cells form an inner perimeter 110 and an outer perimeter 112.
  • the inner perimeter 110 includes one of the plurality of spacer bars 26 having the second preestablished thickness "T2" and being a single unitary bar.
  • the bar 26 is positioned between the two primary surface sheets 22 along the base edge 30 corresponding to the center portion 40.
  • the inner perimeter 110 is sealingly secured, in this application by welding. The welding process further sealingly secures the one of the plurality of spacer bars 26 positioned on the donor side 16 of the two primary surface sheets 22 at the base edge 30 between the pair of ends 32.
  • the outer perimeter 112 includes the "U" bar 28 being a single unitary bar.
  • the "U" bar 28 is positioned between the two primary surface sheets 22 along the pair of extension edges 38 and the outer edge 34.
  • the outer perimeter 112 is sealingly secured, in this application by welding. The welding process further sealingly secures the one of the plurality of spacer bars 26 positioned on the donor side 16 of the two primary surface sheets 22 at the outer edge 34.
  • the cells 8 are formed by a fixture, not shown.
  • the fixture positions the components of the cell 8, forms the components and maintains the components in a preestablished position and form while the components are fixedly secured one to the other.
  • the components of the cell 8 could be formed prior to being positioned and fixedly secured.
  • the components of the cell 8 could be positioned and fixedly secured prior to being formed.
  • the relative components are positioned.
  • One example of such a fixturing would be as follows, with the components parts in the unbent form, one of the primary surface sheets 22 is positioned with the donor side 16 up.
  • One of the plurality of spacer bars 26 having the first preestablished thickness "Tl" and the length corresponding to the length of the base edge 30 is positioned along the base edge 30.
  • Another one of the plurality of spacer bars 26 having the first preestablished thickness "Tl" and the length corresponding to the length of the outer edge 34 is positioned along the outer edge 34.
  • a portion of the base edge 30 of the primary surface sheet 22 is welded to the one of the plurality of spacer bars 26 positioned along the inner edge 30.
  • the outer edge 34 of the primary surface sheet 22 is tack welded to the another one of the plurality of spacer bars 26.
  • the primary surface sheet 22 with one of the plurality of spacer bars 26 attached at the outer edge 34 and the base edge 30 is rotated to position the recipient side 20 up.
  • the pair of the guide strips 24 having the axial portion 80 extending from the base 50 is positioned in each of the wing portions 42.
  • the "U" bar 28 having the thickness "T2" is positioned with the base 90 corresponding to the outer edge 34 and each of the pair of legs 92 corresponding to the respective pair of extension edges 38.
  • the additional components are tack welded or attached to the recipient side 20 of the primary surface sheet 22.
  • an additional one of the primary surface sheet 22 is positioned symmetrically about the existing one of the primary surface sheet 22 with the recipient side 20 down and the donor side 16 up.
  • recipient sides 20 face one another.
  • One of the plurality of spacer bars 26 having the first preestablished thickness "Tl" and the length corresponding to the length of the base edge 30 is positioned along the base edge 30.
  • Another one of the plurality of spacer bars 26 having the first preestablished thickness "Tl" and the length corresponding to the length of the outer edge 34 is positioned along the outer edge 34.
  • the component parts are tacked.
  • the components of the one of the plurality of cells are placed in a fixture, formed to an involute and welded. As a further alternative, the components parts could be formed prior to being positioned within the fixture.
  • the pair of the guide strips 24 having the axial portion 56 extending from the height 52 is positioned in each of the wing portions 42.
  • the pair of guide strips 24 is, in this application, tacked.
  • the pair of guide strips 24 could be attached by other conventional methods such as an adhesive.
  • the weld begins at one of the pair of ends 32, continues along one of the pair of extension edges 28, continues along the outer edge 34 and continues along the other of the pair of extension edges 28 to the other of the pair of ends 32.
  • Another weld extends along the base 30 of the center portion 40.
  • the base 30 along the wing portions 42 has each of the plurality of spacer bars 26 having the first preestablished thickness "Tl" on the donor side 16 attached to the corresponding one of the primary surface sheets 22.
  • the space or portion of the passage 14 between the primary surface sheets 22 having the guide strips 24 therein and corresponding to the base 50 is free of weld.
  • This passage 14 provides the flow path for the recipient fluid into and along the wing portion 42, along the center portion 40 and passing along the wing portion 42 and escaping therefrom.
  • the cells 8 are positioned side by side, with the base edge 30 forming the inner diameter 10 and the outer edge 34 forming the outer diameter 12.
  • the corresponding plurality of spacer bars 26 having the first preestablished thickness "Tl” and being attached to the donor side 16 of the primary surface sheets 22 of the cells 8 are welded along the base edge 30 from one of the pair of ends 32 to the other pair of ends 32.
  • the corresponding plurality of spacer bars 26 having the first preestablished thickness "Tl” and being attached to the donor side 16 of the primary surface sheets 22 of the cells 8 are welded along the outer edge 30 from one of the pair of ends 36 to the other of the pair of ends 36.
  • each of the cells 8 are sealingly connected one to the other forming the passage 14 for the flow of donor fluid and the passage 18 for the flow of recipient fluid.
  • the space or portion of the passage 18 between the primary surface sheets 22 having the guide strips 24 therein and corresponding to the base 50 provides the flow path for the recipient fluid.
  • the recipient fluid flows into and along the wing portion 42, along the center portion 40 and passes along the wing portion 42 and escapes therefrom.
  • the space between the corresponding one of the pair of extension edges 38 of the individual primary surface sheets 22 of the cell 8 corresponding to the hypotenuse 54 provides the passage 14 for the flow of the donor fluid.
  • the donor fluid flows into and along the wing portion 42, along the center portion 40 and passes along the wing portion 42 and escapes therefrom.
  • the recuperator 6 has a structure in which very high stresses are induced.
  • the recuperator 6 must operating at temperatures of between about 500 degrees C. and 700 degrees C. and internal pressures of between approximately 450 kPa and 1400 kPa under operating conditions involving repeated and rapid starting and stopping cycles.
  • the hot donor fluid being at a temperatures of between about 500 degrees C. and 700 degrees C.
  • the recipient fluid being near an atmospheric temperatures of between about 0 degrees C. and 60 degrees C.
  • the thermal difference experienced by the recuperator 6 is extremely high resulting in the thermal stress induced therein also being extremely high.
  • the "U" bar 28 being a single unitary bar or a continuous bar, verses a segmented bar, this stress is better resisted increasing the life and longevity of the recuperator 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

On utilise des récupérateurs pour améliorer le rendement de turbomachines. Les récupérateurs (6) de cette invention sont constitués d'une pluralité de cellules (8). Chaque cellule (8) comprend plusieurs constituants tels que plusieurs feuilles (22), plusieurs barres (26) d'écartement, une barre (28) en forme de U et une paire de glissières (24). Pour supporter plus efficacement les charges, les cycles et les contraintes auxquels est soumis l'échangeur de chaleur à surface primaire ou le récupérateur (6), les cellules (8) doivent être fabriquées pour supporter plus efficacement ces charges, cycles et contraintes. L'utilisation de la barre (28) unique en forme de U et des barres (26) d'écartement individuelles augmente l'efficacité des cellules (8) à supporter ces charges, cycles et contraintes. Par conséquent, la contrainte s'exerçant au niveau des extrémités individuelles (36) est rendue plus forte avec la barre (28) unique en forme de U par rapport à l'utilisation de plusieurs constituants individuels pour former la barre (28) en forme de U. En outre, l'utilisation d'un nombre moins important d'éléments réduit le coût des constituants et le travail nécessaire pour assembler les cellules (8).
PCT/US1998/023269 1997-11-05 1998-10-30 Procede de production ameliore d'une cellule de recuperateur WO1999023435A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96432797A 1997-11-05 1997-11-05
US08/964,327 1997-11-05

Publications (1)

Publication Number Publication Date
WO1999023435A1 true WO1999023435A1 (fr) 1999-05-14

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Application Number Title Priority Date Filing Date
PCT/US1998/023269 WO1999023435A1 (fr) 1997-11-05 1998-10-30 Procede de production ameliore d'une cellule de recuperateur

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WO (1) WO1999023435A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002039045A3 (fr) * 2000-11-06 2003-02-06 Capstone Turbine Corp Conception de recuperateur annulaire amelioree
WO2006032258A1 (fr) * 2004-09-23 2006-03-30 Josef Bachmaier Echangeur de chaleur
CN102072023A (zh) * 2010-12-07 2011-05-25 四川达宇特种车辆制造厂 主表面式回热器
CN102562308A (zh) * 2011-12-15 2012-07-11 西安远航真空钎焊技术有限公司 一种小型高效回热器及其制造方法
US20170211893A1 (en) * 2016-01-22 2017-07-27 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Heat exchanger and heat exchange method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1409967A (en) * 1920-10-29 1922-03-21 Prat Emile Heat exchanger
US3759323A (en) * 1971-11-18 1973-09-18 Caterpillar Tractor Co C-flow stacked plate heat exchanger
US4438809A (en) * 1980-08-01 1984-03-27 Thaddeus Papis Tapered plate annular heat exchanger
US5060721A (en) 1990-05-29 1991-10-29 Solar Turbines Incorporated Circular heat exchanger
US5081834A (en) * 1990-05-29 1992-01-21 Solar Turbines Incorporated Circular heat exchanger having uniform cross-sectional area throughout the passages therein
FR2704310A1 (fr) * 1993-04-20 1994-10-28 Const Aero Navales Echangeur à plaques et barrettes à circuits croisés.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1409967A (en) * 1920-10-29 1922-03-21 Prat Emile Heat exchanger
US3759323A (en) * 1971-11-18 1973-09-18 Caterpillar Tractor Co C-flow stacked plate heat exchanger
US4438809A (en) * 1980-08-01 1984-03-27 Thaddeus Papis Tapered plate annular heat exchanger
US5060721A (en) 1990-05-29 1991-10-29 Solar Turbines Incorporated Circular heat exchanger
US5081834A (en) * 1990-05-29 1992-01-21 Solar Turbines Incorporated Circular heat exchanger having uniform cross-sectional area throughout the passages therein
FR2704310A1 (fr) * 1993-04-20 1994-10-28 Const Aero Navales Echangeur à plaques et barrettes à circuits croisés.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002039045A3 (fr) * 2000-11-06 2003-02-06 Capstone Turbine Corp Conception de recuperateur annulaire amelioree
US6951110B2 (en) 2000-11-06 2005-10-04 Capstone Turbine Corporation Annular recuperator design
WO2006032258A1 (fr) * 2004-09-23 2006-03-30 Josef Bachmaier Echangeur de chaleur
DE102004046587B4 (de) * 2004-09-23 2007-02-22 Josef Bachmaier Wärmetauscher
CN102072023A (zh) * 2010-12-07 2011-05-25 四川达宇特种车辆制造厂 主表面式回热器
CN102562308A (zh) * 2011-12-15 2012-07-11 西安远航真空钎焊技术有限公司 一种小型高效回热器及其制造方法
US20170211893A1 (en) * 2016-01-22 2017-07-27 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Heat exchanger and heat exchange method

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