US3258067A - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
US3258067A
US3258067A US371288A US37128864A US3258067A US 3258067 A US3258067 A US 3258067A US 371288 A US371288 A US 371288A US 37128864 A US37128864 A US 37128864A US 3258067 A US3258067 A US 3258067A
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US
United States
Prior art keywords
tubes
housing
heat exchanger
header
headers
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.)
Expired - Lifetime
Application number
US371288A
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English (en)
Inventor
Fleur James K La
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.)
La Fleur Corp
Original Assignee
La Fleur Corp
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 La Fleur Corp filed Critical La Fleur Corp
Priority to US371288A priority Critical patent/US3258067A/en
Priority to GB23018/65A priority patent/GB1076875A/en
Priority to BE664744D priority patent/BE664744A/xx
Priority to LU48734D priority patent/LU48734A1/xx
Priority to FR19163A priority patent/FR1437811A/fr
Priority to CH765565A priority patent/CH441405A/fr
Priority to ES0313641A priority patent/ES313641A1/es
Application granted granted Critical
Publication of US3258067A publication Critical patent/US3258067A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • 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
    • F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
    • F02C1/002—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid using an auxiliary fluid
    • F02C1/005—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid using an auxiliary fluid being recirculated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • 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
    • F28D7/08—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 otherwise bent, e.g. in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/051—Heat exchange having expansion and contraction relieving or absorbing means
    • Y10S165/052—Heat exchange having expansion and contraction relieving or absorbing means for cylindrical heat exchanger
    • Y10S165/063—Cylindrical heat exchanger fixed to fixed end supports
    • Y10S165/065—Bent cylindrical heat exchanger

Definitions

  • This invention relates to a gas heater and is particularly directed to a compressed gas heater or heat exchanger designed especially for the heating of compressed propulsive gas, such as helium, especially useful for driving a turbine in a closed cycle gas turbine power plant.
  • helium is first compressed, is then heated in a hot regenerator, and passed to a heat exchanger. In the heat exchanger the helium is further heated to a high temperature for introduction into a hot turbine which functions to supply power to the compressor. In such heat exchanger hot combustion gases are passed into heat exchange relation with the helium.
  • helium gas enters the compressed gas heater or heat exchanger at approximately 1000 F. and is heated therein to about 1200 F. by hot combustion gases.
  • the hot combustion gases employed as heat transfermedium for heating the compressed helium in the heat exchanger are reduced in temperature from the stoichiometric combustion gas temperature of about 3500 F. down to approximately 1700 F. before being assed into the exchanger and across the high pressure gas, e.g., helium, being heated therein.
  • a major advantage of the system and procedure described in my copending application filed of even date herewith is that due to the lowered temperature of the combustion gas used to heat the compressed gas, that is, helium, in the heat exchanger, the size of the heat exchanger can be greatly reduced because of such lower temperature, making it possible to construct compact heat exchange surfaces using thin-walled tubing, and the cost of construction material employed in fabricating heat exchange surfaces is greatly reduced due to the greater strength of the conventional metals and alloys used for such construction, at temperatures below about 1700 F while at the same time further reducing the danger of deterioration or burning out of the heat exchanger tubes.
  • Still another object is the design of a heat exchanger containing thin-walled tubes of relatively small diameter for passage of a compressed gas to be heated, the ends of the tubes being supported in a simple manner without requiring any special means of connection to the supporting walls or headers of the exchanger.
  • a still further object is the provision of a compact heat exchanger, particularly designed for heating compressed gas such as helium by means of hot combustion gases, such that for a given heat flux or rate of heat transfer the overall size of the exchanger is substantially smaller as compared to conventional heat exchangers.
  • the invention provides a novel heat exchanger embodying as the main feature of construction a plurality of tubes, preferably thin-walled tubing of relatively small diameter, which are suspended across the interior of the heat exchanger in the form of a catenary curve, and are supported at their opposite ends by headers mounted adjacent the opposite side walls of the heat exchanger.
  • the tubes are arranged in a plurality of vertically spaced layers or banks within the exchanger. The ends of the tubes are fixedly connected in a simple suitable manner, as by welding, to the walls of the opposite headers for support thereby.
  • the tubes can hang in the form of a curve, that is, a catenary, having a large radius of curvature or relatively small radius of curvature, that is, from a curve which is nearly straight to a curve in the form of substantially a complete semi-circular loop. Because of the manner in which the tubes are supported and the curved configuration of the tubes, thinner construction metals can be employed to provide thinner walled tubing and having a smaller diameter than that which is ordinarily employed, since in ordinary heat exchanger construction the tubes must be sufiiciently rigid and have sufiicient thickness to absorb end loads due to expansion of the tubes on heating.
  • the compact heat exchanger of the invention employing thin-walled tubes supported in the form of a catena-ry has substantially lower thermal losses to the atmosphere as compared to larger size, conventional heat exchangers since, for a given amount of heat flux, the heat exchanger with the smallest volume will have the lowest thermal losses to the atmosphere.
  • FIG. 1 is a perspective vie-w of a heat exchanger according to the invention, with a portion of the outer wall broken away to show banks of tubes having the curved conligunation of the heat exchanger tubes of the invention;
  • FIG. 2 is an elevat-ional cross-section of a heat exchanger of the type shown in FIG. 1;
  • FIG. 3 is a detail taken on line 33 of FIG. 2, showing a plan view of the tubes as arranged in each layer or bank of tubes, and the connection of the ends of the tubes to the headers by welding;
  • FIG. 5 illustrates a modification of the manner of attachment of the ends of the tubes to the headers employing aflaring and rolling type connection.
  • numeral represents the heat exchanger of the invention comprising an outer casing or housing 11 having a gas inlet 12 connected to its upper end and a gas outlet 14 connected in conventional manner to the lower end of the heat exchanger.
  • headers 16 and 18 Supported on opposite side walls 13 and 15 of the heat exchanger housing 11 by suitable means in the form of brackets 15, and preferably surrounded by wall insulation 1511, are headers 16 and 18 of generally cylindrical shape, as seen more clearly in FIG. 1.
  • the header 16 mounted on the heat exchanger wall 13 has a gas inlet 17, and the header 18 mounted on the exchanger wall 15 has a gas outlet 19.
  • a multiplicity of thin-walled small diameter tubes 20 Suspended acrossthe interior of the heat exchanger and supported from headers 16 and 18 is a multiplicity of thin-walled small diameter tubes 20 in the shape of a catenary curve, and arranged in a series of vertically spaced arcuate banks or layers 22 of such tubes, as seen in FIGS. 1, 2 and 4.
  • the respective tubes 20 of each such arcuate bank or layer are mounted in closely spaced parallel relation to each other at substantially the same level within the heat exchanger, progressing from the front to the rear of the exchanger, viewing FIGS. 1 and 2, as illustrated in FIG. 3.
  • Such tubes can be constructed of any suitable metal such as Inconel, stainless steel or any other heat resistant metal.
  • the tubes 20 of the exchanger which preferably hang in the form of a curve which is a catenary, can have a large radius of curvature or a relatively small radius of curvature.
  • each of the tubes 20 are fixedly connected to the wall 21 of each of the heat exchangers 16 and 18.
  • the tubes are passed completely through apertures 23 in the wall'2l1 of the headers, and extend a short distance, as indicated at 25, into the interior of the header beyond the inner surface 27 of the wall thereof.
  • the tube ends are then seal-welded at their inner ends around the periphery of the aperture 23, as indicated at 24.
  • the ends of the tubes 20 also pass completely through suitable apertures 26 in the wall 21 of the headers, e.g., 16, and the tubes are flared at 28 adjacent the outside surface of the header wall 21, and the ends of the tubes are rolled as indicated at 30 against the inner surface 32 of the header wall 2 1, thus maintaining the ends of tubes 20 in fixed position in each of the headers 16 and 18.
  • a compressed gas such as helium and which may be at an elevated temperature, e.'g., of the order of about 1000 F., is fed through inlet 17 into the header 16, and the gas then passes through the banks 22 of catena-ry'tubes 20 and across the heat exchanger in heat exchange relation with, for example, a hot combustion gas, e.g., at a temperature of the order of about 1700 F. introduced via the pipe 12.
  • the hot combustion gases sweep .downwardly, as indicated by the arrows, across the heat exchanger tubes 20 carrying the compressed helium, and then pass downwardly through the heat exchanger and into the discharge outlet 14.
  • Such compressed and heated helium gases can then be fed directly to a turbine used for driving a compressor, as described in my above copending applications, Serial Nos. 87,311 and 318,564.
  • the tubes 20 in the respective arcuate layers or banks 22 can be positioned either directly'in vertical alignment, as illustrated in FIG. 1 of the drawing, or the tubes in one bank can be staggered in relation to the tubes of an adjacent bank or layer.
  • the tubes e.g., 20 are sufficiently rigid so that they maintain their original curvature when hanging in the exchanger. But the tubes are flexible from the standpoint that they will deflect without damage either by expansion as result of heating or by physical displacement without damage. However, the ends of the tubes remain rigidly attached to the respective headers during any such displacement of the tubes.
  • the distance between headers 16 and 18 can be, for example, 13 feet, the length of each of the headers being six feet, the arcuate length of the catenary tubes, such as 20, being 18 feet, and employing about 19 arcuate tube banks 22 having a total of 1,050 tubes, each in diameter and 1 5 in wall thickness.
  • a configuration for a conventionaly heat exchanger having approximately the same heat flux will require about five times the weight of tubing of the invention exchanger described directly above, and the overall size of such conventioanl exchanger would be much greater, e.g., using 250 tubes each approximately 2" in diameter and 200 feet in overall length, such dimensions would be about 20 feet x 10 feet x feet.
  • the invention provides a novel heat exchanger construction in which the tubes are self-supporting and therefore smaller diameter and less expensive tubing may be used. No mechanical supports for the tubes are required, and the gas flow over the tubes is substantially uniform and is not disturbed by sudden changes in flow direction due to use of conventional tube supports. Further, the invention structure results in a more compact arrangement of the heat exchanger, thereby reducing thermal heat losses to the atmosphere.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, one end of each of said tubes connected to said first header and the other end of each of said tubes connected to said second header, a gas inlet to said housing and a gas outlet from said housing, spaced from said gas inlet.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, one end of each of said tubes welded to said first header and the other end of each of said tubes welded to said second header, a gas inlet to said housing and a gas outlet from said housing, spaced from said gas inlet.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, one end of each of said tubes connected to said first header and the other end of each of said tubes connected to said second header, a gas inlet to said housing and a gas outlet from said housing, spaced from said gas inlet, the ends of each of said tubes being connected to said headers by a flared and rolled connection.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, forming arcuate banks of tubes across said housing between said headers, one end of each of said tubes connected to said first header and the other end of each of said tubes connected to said second header, a gas inlet to said housing on one side of said arcuate banks of tubes and a gas outlet from said housing on the other side of said arcuate banks of tubes.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, forming arcuate banks of tubes across said housing between said headers, with the tubes in each bank spaced horizontally from each other, one end of each of said tubes fixedly connected to said first header and the other end of each of said tubes fixedly connected to said second header, a gas inlet to said housing on one side of said arcuate banks of tubes and a gas outlet from said housing on the other side of said arcuate banks of tubes.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, forming a plurality of arcuate banks of tubes, said banks positioned in vertically spaced relation across said housing between said headers, one end of each of said tubes connected to said first header and the other end of each of said tubes connected to said second header, the tubes of each of said banks being spaced horizontally from each other, a gas inlet to said housing on one side of said arcuate banks of tubes and a gas outlet from said housing on the other side of said arcuate banks of tubes.
  • a heat exchanger which comprises a housing, a first header mounted on one side of said housing, a second header mounted on the opposite side of said housing, a plurality of essentially flexible tubes mounted in said housing, said tubes each suspended in the form of a catenary across said housing, forming a plurality of arcuate ban'ksof tubes, said banks positioned in vertically spaced relation across said housing between said headers, one end of each of said tubes welded to said first header and the other end of each of said tubes welded to said second header, the tubes of each of said banks being spaced horizontally from each other, a gas inlet to said housing on one side of said arcuate banks of tubes and a gas outlet from said housing on the other side of said arcuate banks of tubes.
  • a heat exchanger which comprises a housing, a first header mounted adjacent one side wall of said housing, a second header mounted adjacent the opposite side wall of said housing, a plurality of thin-walled metal tubes hanging in the form of a catenary curve across the interior of said housing and communicating with said first and second headers, said tubes being essentially flexible but sufficiently rigid to maintain said catenary configuration, one end of each of said tubes being connected to the wall of said first header and the other end of each of said tubes being connected to the wall of said second header, substantially the entire surface area of said tubes being disposed within said housing and available as heat transfer surface, a gas inlet to said housing positioned above said tubes, and a gas outlet from said housing positioned below said tubes.
  • a heat exchanger which comprises a housing, a first header mounted adjacent one side wall of said housing, a second header mounted adjacent the opposite side wall of said housing, a plurality of thin-walled essentially flexible metal tubes hanging in the form of a catenary curve across the interior of said housing and communicating with said first and second headers, said tubes forming arcuate banks of tubes across said housing between said headers, one end of each of said tubes being connected to the Wall of said first header and the other end of each of said tubes being connected to the wall of said second header, substantially the entire surface area of said tubes being disposed within said housing and available as heat transfer surface, a gas inlet to said housing above said arcuate banks of tubes, and a gas outlet from said housing below said arcuate banks of tubes.
  • a heat exchanger which comprises a housing, a first header mounted adjacent one side wall of said housing, a second header mounted adjacent the opposite side wall of said housing, a plurality of thin-walled metal tubes hanging in the form of a catenary curve across the interior of said housing and communicating with said first and second headers, said tubes being essentially flexible ibut suificiently rigid to maintain said catenary configuration, s-aid tubes forming arcuate, substantially horizontally positioned banks of tubes across said housing between said headers, one end of each of said tubes being welded to the wall of said first header and the other end of each of said tubes being welded to the wall of said second header, substantially the entire surface area of said t-ubes being disposed within said housing and available as heat transfer surface, a gas inlet to said housing above said arcuate banks of tubes, and a gas outlet from said housing below said arcuate banks of tubes.
  • a heat exchanger which com-prises a housing, a first header mounted adjacent one side wall of said housing, a second header mounted adjacent the opposite side wall of said housing, a plurality of thin-walled essentially fiexible :metal tubes hanging in the 'form of a catenary curve across the interior of said housing, and communicating with said first and second headers, said tubes forming a plurality of arcuate, vertically spaced banks of tubes across said housing between said headers, one end of each of said tubes being connected to the wall of said first header and the other end of each of said tubes being connected to the wall of said second header, the tubes of each said bank being spaced horizontally from each other, substantially the entire surface area of said tubes being disposed within said housing and available as heat transfer surface, a gas inlet to said housing above said arcuate banks of tubes, and a gas outlet from said housing below said arcuate banks of tubes.

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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)
US371288A 1964-06-01 1964-06-01 Heat exchanger Expired - Lifetime US3258067A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US371288A US3258067A (en) 1964-06-01 1964-06-01 Heat exchanger
GB23018/65A GB1076875A (en) 1964-06-01 1965-05-31 Heat exchangers
BE664744D BE664744A (fr) 1964-06-01 1965-06-01
LU48734D LU48734A1 (fr) 1964-06-01 1965-06-01
FR19163A FR1437811A (fr) 1964-06-01 1965-06-01 échangeur de chaleur
CH765565A CH441405A (fr) 1964-06-01 1965-06-01 Echangeur de chaleur
ES0313641A ES313641A1 (es) 1964-06-01 1965-06-01 Cambiador de calor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US371288A US3258067A (en) 1964-06-01 1964-06-01 Heat exchanger

Publications (1)

Publication Number Publication Date
US3258067A true US3258067A (en) 1966-06-28

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ID=23463342

Family Applications (1)

Application Number Title Priority Date Filing Date
US371288A Expired - Lifetime US3258067A (en) 1964-06-01 1964-06-01 Heat exchanger

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Country Link
US (1) US3258067A (fr)
BE (1) BE664744A (fr)
CH (1) CH441405A (fr)
ES (1) ES313641A1 (fr)
FR (1) FR1437811A (fr)
GB (1) GB1076875A (fr)
LU (1) LU48734A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363355A (en) * 1980-05-09 1982-12-14 Prucyk Martin D Heat exchanger
US4499055A (en) * 1981-09-14 1985-02-12 Exxon Research & Engineering Co. Furnace having bent/single-pass tubes
US4588026A (en) * 1979-06-11 1986-05-13 Raytheon Company Coiled heat exchanger
WO2005075924A1 (fr) * 2004-01-28 2005-08-18 Madioen Holding B.V. Procede permettant de former un raccord soude entre une plaque tubulaire et un nombre donnee de tubes et dispositif resultant
US20100209233A1 (en) * 2009-02-13 2010-08-19 General Electric Company Catenary turbine seal systems
US8511976B2 (en) 2010-08-02 2013-08-20 General Electric Company Turbine seal system
US20230167399A1 (en) * 2021-11-29 2023-06-01 Vrm International Pty Ltd Method for the continuous generation and harvesting of biothermal energy

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230594B (en) * 1989-04-21 1993-09-01 Rolls Royce Plc Heat exchanger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1438596A (en) * 1922-03-13 1922-12-12 Harding Harvey Boiler
US1769963A (en) * 1927-04-14 1930-07-08 Griscom Russell Co Gas-cooling apparatus
US1783724A (en) * 1926-10-07 1930-12-02 La Mont Corp Art of effecting heat exchange
US1796945A (en) * 1928-10-30 1931-03-17 Babcock & Wilcox Co Heat exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1438596A (en) * 1922-03-13 1922-12-12 Harding Harvey Boiler
US1783724A (en) * 1926-10-07 1930-12-02 La Mont Corp Art of effecting heat exchange
US1769963A (en) * 1927-04-14 1930-07-08 Griscom Russell Co Gas-cooling apparatus
US1796945A (en) * 1928-10-30 1931-03-17 Babcock & Wilcox Co Heat exchanger

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4588026A (en) * 1979-06-11 1986-05-13 Raytheon Company Coiled heat exchanger
US4363355A (en) * 1980-05-09 1982-12-14 Prucyk Martin D Heat exchanger
US4499055A (en) * 1981-09-14 1985-02-12 Exxon Research & Engineering Co. Furnace having bent/single-pass tubes
WO2005075924A1 (fr) * 2004-01-28 2005-08-18 Madioen Holding B.V. Procede permettant de former un raccord soude entre une plaque tubulaire et un nombre donnee de tubes et dispositif resultant
US20100209233A1 (en) * 2009-02-13 2010-08-19 General Electric Company Catenary turbine seal systems
US8235656B2 (en) 2009-02-13 2012-08-07 General Electric Company Catenary turbine seal systems
US8511976B2 (en) 2010-08-02 2013-08-20 General Electric Company Turbine seal system
US20230167399A1 (en) * 2021-11-29 2023-06-01 Vrm International Pty Ltd Method for the continuous generation and harvesting of biothermal energy

Also Published As

Publication number Publication date
CH441405A (fr) 1967-08-15
FR1437811A (fr) 1966-05-06
GB1076875A (en) 1967-07-26
ES313641A1 (es) 1966-05-01
BE664744A (fr) 1965-12-01
LU48734A1 (fr) 1965-12-01

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