US1524520A - Heat-exchange apparatus - Google Patents

Heat-exchange apparatus Download PDF

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Publication number
US1524520A
US1524520A US718582A US71858224A US1524520A US 1524520 A US1524520 A US 1524520A US 718582 A US718582 A US 718582A US 71858224 A US71858224 A US 71858224A US 1524520 A US1524520 A US 1524520A
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Prior art keywords
heat
ribs
group
exchange apparatus
gases
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Expired - Lifetime
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US718582A
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Junkers Hugo
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Priority to US718582A priority patent/US1524520A/en
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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
    • 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
    • F28F1/24—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 transversely
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/41—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes in serpentine form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0007—Water heaters
    • 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
    • F28D7/082—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 with serpentine or zig-zag configuration
    • F28D7/085—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 with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions
    • 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
    • F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the invention has for its purpose to improve the economy of such heat exchange apparatus, especially in the use for heating liquids, by setting in such a relation the heat transmission coeflicient and the temperature difference between the heat exchange fluids or gasses in every group, that the said coeflicient is augmented from one group to the next in proportion to the diminishing temperature difference.
  • a tube 1 through which the water to be heated streams in any desired direction, is bent to such a form that it crosses with several branches a flue leading the heating gases in the direction shown by the arrows a.
  • Each branch is provided wlth ribs 2 in such manner, that the lowest group contains a small number of ribs, the next group a somewhat greater number and so on,
  • the flue is upwardly overcome the restriction to the flow of heated gases caused by the upwardly increasing numbers of ribs.
  • the heater is of the same general arrangement as in Fig. 1, but in each group the ribs are thinner and arranged at less distances apart than in the preceding group.
  • This latter form of construction has the following special advantages.
  • the heating gases entering with the highest tem erature are caused by the small rib sur ace and the small heat transmission coeificient in the first group, to deliver to-these ribs only that amount of heat, which serves for the desired distribution of temperatures, then the said gases are caught in the'second group by an enlarged heat transmission surface, which corresponds to their diminished tem perature, thus givin substantially the same' heat exchan e for the second group as for the first. This is also true for each successive group.
  • a heat exchange apparatus comprising a duct for the passage of a heating medium such as heated gases; a second duct for the passage of a fluid to be heated consisting of a pipe passing transversely through the first named duct at various points between the inlet and outlet thereof, each pipe section through said first named duct being area for each pipe section, and at the same time decrease in thickness and in their distance apart for each pipe section, in the direction of the flow of the heating medium through the first named duct.
  • a heating medium such as heated gases
  • a second duct for the passage of a fluid to be heated consisting of a pipe passing transversely through the first named duct at various points between the inlet and outlet thereof, each pipe section through said first named duct being area for each pipe section, and at the same time decrease in thickness and in their distance apart for each pipe section, in the direction of the flow of the heating medium through the first named duct.

Description

H. JUNKERS HEAT EXCHANGE APPARATUS Filed June '7 Patented. J an. 27, 1925.
UNITED STATES HUGO JUNKERS, 0F DESSAU, GERMANY.
HEAT-EXCHANGE APPARATUS.
Application filed June 7,
To all whom it may concern:
Be it known that I, Hoe-0 JUNKERS, a citizen of Germany, residing at Dessau, Anhalt, Germany, Cothenerstrasse 27, have invented certain new and useful Improvements in Heat-Exchange Apparatus (for which I have made an application in Germany, August 5th, 1922), and of which the following 1s a specification.
In heat exchange apparatus formed as bodies with the ribs or gills it is known to distribute the entire rib surface over separate groups of ribs, which follow upon each other in the direction of the medium streaming between the ribs.
The invention has for its purpose to improve the economy of such heat exchange apparatus, especially in the use for heating liquids, by setting in such a relation the heat transmission coeflicient and the temperature difference between the heat exchange fluids or gasses in every group, that the said coeflicient is augmented from one group to the next in proportion to the diminishing temperature difference.
This is accomplished by arranging several groups of ribs in the direction of flow of the hot gases and giving to every group a greater rib surface per unit of the current path than in the preceding group, in proportion to the decreasing temperature difference between the heat exchanging media. lVith particular advantage, in addition to the said increase of the rib surface, the groups following upon each other in the direction of the current streaming between them have decreasing thicknesses of the rib walls, and the distance between the ribs decreases from every group to the subsequent. The said decrease of the rib distance produces directly an augmentation of the heat transmission coefficient, and simultaneously the medium streamin between the ribs is forced to adopt a higher velocity, which again augments the heat transmitting coefiicient.
The invention is illustrated in the accompanying drawing, in which Figs. 1 and 2 show w he t e change apparatuses, in
enlarged in order to which is exposed to the hottest 1924. Serial No. 718,582.
section, constructed in accordance with my invention.
According to Fig. 1 a tube 1, through which the water to be heated streams in any desired direction, is bent to such a form that it crosses with several branches a flue leading the heating gases in the direction shown by the arrows a. Each branch is provided wlth ribs 2 in such manner, that the lowest group contains a small number of ribs, the next group a somewhat greater number and so on, The flue is upwardly overcome the restriction to the flow of heated gases caused by the upwardly increasing numbers of ribs.
According to Fig. 2 the heater is of the same general arrangement as in Fig. 1, but in each group the ribs are thinner and arranged at less distances apart than in the preceding group.
This latter form of construction has the following special advantages. The great distances between the ribs in the first group, gases, avoid the deposition of gas residua, and the great thickness of the ribs in this group prevents melting of the metallic coating of the ribs and other destructions by heat, which otherwise might occur. The heating gases entering with the highest tem erature are caused by the small rib sur ace and the small heat transmission coeificient in the first group, to deliver to-these ribs only that amount of heat, which serves for the desired distribution of temperatures, then the said gases are caught in the'second group by an enlarged heat transmission surface, which corresponds to their diminished tem perature, thus givin substantially the same' heat exchan e for the second group as for the first. This is also true for each successive group.
I claim:
A heat exchange apparatus comprising a duct for the passage of a heating medium such as heated gases; a second duct for the passage of a fluid to be heated consisting of a pipe passing transversely through the first named duct at various points between the inlet and outlet thereof, each pipe section through said first named duct being area for each pipe section, and at the same time decrease in thickness and in their distance apart for each pipe section, in the direction of the flow of the heating medium through the first named duct.
In witness whereof I aflix my signature.
HUGO J UNKERS.
US718582A 1924-06-07 1924-06-07 Heat-exchange apparatus Expired - Lifetime US1524520A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE416338D BE416338A (en) 1924-06-07
US718582A US1524520A (en) 1924-06-07 1924-06-07 Heat-exchange apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US718582A US1524520A (en) 1924-06-07 1924-06-07 Heat-exchange apparatus

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Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451629A (en) * 1943-06-11 1948-10-19 Stewart Warner Corp Sectional hot-air heater
US2512540A (en) * 1945-02-19 1950-06-20 Rue Gas Dev Ltd De Heat exchanger
US2613065A (en) * 1947-11-21 1952-10-07 Chausson Usines Sa Cooling radiator
US2641111A (en) * 1952-03-14 1953-06-09 Robert H Bishop Refrigeration apparatus and method
US2669850A (en) * 1951-11-14 1954-02-23 Robert H Bishop Refrigerated open top compartment
US2853859A (en) * 1945-05-04 1958-09-30 William I Thompson Cold traps
US2929229A (en) * 1958-02-26 1960-03-22 C V Hill & Company Inc Evaporator-blower unit for refrigerated equipment
US2932955A (en) * 1958-12-31 1960-04-19 Schaefer Inc Gravity-flow open-topped refrigerated display cabinet
US2998228A (en) * 1956-11-23 1961-08-29 Huet Andre Surface heat exchangers
US3067592A (en) * 1962-12-11 figure
US3067587A (en) * 1960-05-04 1962-12-11 Mcfarlan Alden Irving Air conditioning system
US3084914A (en) * 1958-06-23 1963-04-09 Scient Design Co Condenser for recovery of sublimable materials
US3142034A (en) * 1959-02-10 1964-07-21 Miguel C Junger Elastic wave radiator and detector
US3144901A (en) * 1960-05-13 1964-08-18 Lizenzia A G Movable air conditioning apparatus
US3149479A (en) * 1961-05-01 1964-09-22 Rudy Mfg Company Evaporator-condenser unit
US3208234A (en) * 1963-03-01 1965-09-28 Lockheed Aircraft Corp Air cycle refrigeration system and method
US3223152A (en) * 1962-12-27 1965-12-14 Gea Luftkuhler Ges M B H Surface condenser
US3877517A (en) * 1973-07-23 1975-04-15 Peerless Of America Heat exchangers
US4016835A (en) * 1975-08-01 1977-04-12 Southwestern Engineering Company Moisture separator-reheater
US4381592A (en) * 1979-03-02 1983-05-03 Venables Iii Herbert J Method of producing helically wound spine fin heat exchanger
US4421095A (en) * 1981-09-28 1983-12-20 Philipp Kreis Gmbh & Co. Room heating apparatus for small spaces
US4438808A (en) * 1979-03-02 1984-03-27 Venables Iii Herbert J Heat exchanger tube
US4482004A (en) * 1977-11-09 1984-11-13 Qdot Corporation Waste heat boiler
US4621681A (en) * 1977-11-09 1986-11-11 Q-Dot Corporation Waste heat boiler
EP0359306A2 (en) * 1988-09-13 1990-03-21 "Stelrad Ideal" Boiler
US5131461A (en) * 1991-03-26 1992-07-21 Ronald Englert Heating apparatus
US5259214A (en) * 1990-11-08 1993-11-09 Mitsubishi Denki Kabushiki Kaisha Air conditioning system
EP0485203B1 (en) * 1990-11-08 1995-02-01 Mitsubishi Denki Kabushiki Kaisha Air conditioning system
US6094934A (en) * 1998-10-07 2000-08-01 Carrier Corporation Freezer
US6419009B1 (en) * 1997-08-11 2002-07-16 Christian Thomas Gregory Radial flow heat exchanger
WO2003093748A1 (en) * 2002-05-01 2003-11-13 Gregory Christian T Radial flow heat exchanger
US20040035019A1 (en) * 2002-08-21 2004-02-26 Park Young Hwan Condensing type clothes dryer and condenser thereof
EP1464907A1 (en) * 2003-04-04 2004-10-06 Geminox Heat exchanger with a finned tube helically coiled and boiler comprising such a heat exchanger
US20050056408A1 (en) * 1998-08-10 2005-03-17 Gregory Christian T. Radial flow heat exchanger
US20050241812A1 (en) * 2004-04-29 2005-11-03 Hewlett-Packard Development Company, L.P. Multiple-pass heat exchanger with gaps between fins of adjacent tube segments
US20050274501A1 (en) * 2004-06-09 2005-12-15 Agee Keith D Decreased hot side fin density heat exchanger
US20060102329A1 (en) * 2004-11-12 2006-05-18 Carrier Corporation Parallel flow evaporator with non-uniform characteristics
US20070186565A1 (en) * 2004-06-15 2007-08-16 Ned Baudat Apparatus and methods for converting cryogenic fluid into gas
EP1870655A3 (en) * 2006-06-24 2011-01-19 Pierburg GmbH Heat exchanger unit for a combustion engine
US20130112373A1 (en) * 2010-05-18 2013-05-09 Hiroyuki Fukai Cooling device with a plurality of fin pitches
US20140014308A1 (en) * 2012-07-13 2014-01-16 Delta Electronics, Inc. Heat Sink and Electronic Device and Heat Exchanger Applying the Same
US20150016171A1 (en) * 2013-07-10 2015-01-15 Hitachi, Ltd. Traction converter and railway vehicle
US20160025425A1 (en) * 2014-07-25 2016-01-28 Hamilton Sundstrand Corporation Heat exchanger with slotted guard fin
EP3002527A1 (en) * 2014-09-27 2016-04-06 Vaillant GmbH Heat exchanger and gas water heating appliance using the same
EP3076117A1 (en) * 2015-04-02 2016-10-05 Doosan Heavy Industries & Construction Co., Ltd. Heat exchanger unit
US20160376986A1 (en) * 2015-06-25 2016-12-29 Hrst, Inc. Dual Purpose Heat Transfer Surface Device
EP2369285A3 (en) * 2010-03-24 2017-02-22 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. Heat exchanger
US20170131034A1 (en) * 2015-11-10 2017-05-11 Hamilton Sundstrand Corporation Heat exchanger
US10352585B1 (en) 2018-02-09 2019-07-16 Theodore S. BROWN Multi-pass boiler and retrofit method for an existing single-pass boiler
US10533769B2 (en) * 2017-07-28 2020-01-14 Viessmann Werke Gmbh & Co Kg Heating device
US10976116B2 (en) * 2018-05-28 2021-04-13 Coretronic Corporation Liquid cooled heat dissipation device
US20220100242A1 (en) * 2019-01-25 2022-03-31 Asetek Danmark A/S Cooling system including a heat exchanging unit

Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067592A (en) * 1962-12-11 figure
US2451629A (en) * 1943-06-11 1948-10-19 Stewart Warner Corp Sectional hot-air heater
US2512540A (en) * 1945-02-19 1950-06-20 Rue Gas Dev Ltd De Heat exchanger
US2853859A (en) * 1945-05-04 1958-09-30 William I Thompson Cold traps
US2613065A (en) * 1947-11-21 1952-10-07 Chausson Usines Sa Cooling radiator
US2669850A (en) * 1951-11-14 1954-02-23 Robert H Bishop Refrigerated open top compartment
US2641111A (en) * 1952-03-14 1953-06-09 Robert H Bishop Refrigeration apparatus and method
US2998228A (en) * 1956-11-23 1961-08-29 Huet Andre Surface heat exchangers
US2929229A (en) * 1958-02-26 1960-03-22 C V Hill & Company Inc Evaporator-blower unit for refrigerated equipment
US3084914A (en) * 1958-06-23 1963-04-09 Scient Design Co Condenser for recovery of sublimable materials
US2932955A (en) * 1958-12-31 1960-04-19 Schaefer Inc Gravity-flow open-topped refrigerated display cabinet
US3142034A (en) * 1959-02-10 1964-07-21 Miguel C Junger Elastic wave radiator and detector
US3067587A (en) * 1960-05-04 1962-12-11 Mcfarlan Alden Irving Air conditioning system
US3144901A (en) * 1960-05-13 1964-08-18 Lizenzia A G Movable air conditioning apparatus
US3149479A (en) * 1961-05-01 1964-09-22 Rudy Mfg Company Evaporator-condenser unit
US3223152A (en) * 1962-12-27 1965-12-14 Gea Luftkuhler Ges M B H Surface condenser
US3208234A (en) * 1963-03-01 1965-09-28 Lockheed Aircraft Corp Air cycle refrigeration system and method
US3877517A (en) * 1973-07-23 1975-04-15 Peerless Of America Heat exchangers
US4016835A (en) * 1975-08-01 1977-04-12 Southwestern Engineering Company Moisture separator-reheater
US4482004A (en) * 1977-11-09 1984-11-13 Qdot Corporation Waste heat boiler
US4621681A (en) * 1977-11-09 1986-11-11 Q-Dot Corporation Waste heat boiler
US4381592A (en) * 1979-03-02 1983-05-03 Venables Iii Herbert J Method of producing helically wound spine fin heat exchanger
US4438808A (en) * 1979-03-02 1984-03-27 Venables Iii Herbert J Heat exchanger tube
US4421095A (en) * 1981-09-28 1983-12-20 Philipp Kreis Gmbh & Co. Room heating apparatus for small spaces
EP0359306A2 (en) * 1988-09-13 1990-03-21 "Stelrad Ideal" Boiler
EP0359306A3 (en) * 1988-09-13 1991-02-06 "Stelrad Ideal" Boiler
US5259214A (en) * 1990-11-08 1993-11-09 Mitsubishi Denki Kabushiki Kaisha Air conditioning system
EP0485203B1 (en) * 1990-11-08 1995-02-01 Mitsubishi Denki Kabushiki Kaisha Air conditioning system
US5131461A (en) * 1991-03-26 1992-07-21 Ronald Englert Heating apparatus
US6419009B1 (en) * 1997-08-11 2002-07-16 Christian Thomas Gregory Radial flow heat exchanger
US20050056408A1 (en) * 1998-08-10 2005-03-17 Gregory Christian T. Radial flow heat exchanger
US7128136B2 (en) 1998-08-10 2006-10-31 Gregory Christian T Radial flow heat exchanger
US6094934A (en) * 1998-10-07 2000-08-01 Carrier Corporation Freezer
WO2003093748A1 (en) * 2002-05-01 2003-11-13 Gregory Christian T Radial flow heat exchanger
US20040035019A1 (en) * 2002-08-21 2004-02-26 Park Young Hwan Condensing type clothes dryer and condenser thereof
US6769196B2 (en) * 2002-08-21 2004-08-03 Lg Electronics Inc. Condensing type clothes dryer and condenser thereof
FR2853398A1 (en) * 2003-04-04 2004-10-08 Geminox HELICOIDAL HEAT EXCHANGER WITH FINS AND BOILER EQUIPPED WITH SUCH EXCHANGER
EP1464907A1 (en) * 2003-04-04 2004-10-06 Geminox Heat exchanger with a finned tube helically coiled and boiler comprising such a heat exchanger
US20050241812A1 (en) * 2004-04-29 2005-11-03 Hewlett-Packard Development Company, L.P. Multiple-pass heat exchanger with gaps between fins of adjacent tube segments
US6997247B2 (en) * 2004-04-29 2006-02-14 Hewlett-Packard Development Company, L.P. Multiple-pass heat exchanger with gaps between fins of adjacent tube segments
US20050274501A1 (en) * 2004-06-09 2005-12-15 Agee Keith D Decreased hot side fin density heat exchanger
US7073573B2 (en) * 2004-06-09 2006-07-11 Honeywell International, Inc. Decreased hot side fin density heat exchanger
US20070186565A1 (en) * 2004-06-15 2007-08-16 Ned Baudat Apparatus and methods for converting cryogenic fluid into gas
US20100043452A1 (en) * 2004-06-15 2010-02-25 Ned Baudat Apparatus and methods for converting a cryogenic fluid into gas
US20060102329A1 (en) * 2004-11-12 2006-05-18 Carrier Corporation Parallel flow evaporator with non-uniform characteristics
US7163052B2 (en) * 2004-11-12 2007-01-16 Carrier Corporation Parallel flow evaporator with non-uniform characteristics
EP1870655A3 (en) * 2006-06-24 2011-01-19 Pierburg GmbH Heat exchanger unit for a combustion engine
EP2369285A3 (en) * 2010-03-24 2017-02-22 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. Heat exchanger
US20130112373A1 (en) * 2010-05-18 2013-05-09 Hiroyuki Fukai Cooling device with a plurality of fin pitches
US20140014308A1 (en) * 2012-07-13 2014-01-16 Delta Electronics, Inc. Heat Sink and Electronic Device and Heat Exchanger Applying the Same
US20150016171A1 (en) * 2013-07-10 2015-01-15 Hitachi, Ltd. Traction converter and railway vehicle
US20160025425A1 (en) * 2014-07-25 2016-01-28 Hamilton Sundstrand Corporation Heat exchanger with slotted guard fin
EP3002527A1 (en) * 2014-09-27 2016-04-06 Vaillant GmbH Heat exchanger and gas water heating appliance using the same
EP3076117A1 (en) * 2015-04-02 2016-10-05 Doosan Heavy Industries & Construction Co., Ltd. Heat exchanger unit
US10151537B2 (en) 2015-04-02 2018-12-11 DOOSAN Heavy Industries Construction Co., LTD Heat exchanger unit
US20160376986A1 (en) * 2015-06-25 2016-12-29 Hrst, Inc. Dual Purpose Heat Transfer Surface Device
US20170131034A1 (en) * 2015-11-10 2017-05-11 Hamilton Sundstrand Corporation Heat exchanger
US10422586B2 (en) * 2015-11-10 2019-09-24 Hamilton Sundstrand Corporation Heat exchanger
US10533769B2 (en) * 2017-07-28 2020-01-14 Viessmann Werke Gmbh & Co Kg Heating device
US10352585B1 (en) 2018-02-09 2019-07-16 Theodore S. BROWN Multi-pass boiler and retrofit method for an existing single-pass boiler
US10976116B2 (en) * 2018-05-28 2021-04-13 Coretronic Corporation Liquid cooled heat dissipation device
US20220100242A1 (en) * 2019-01-25 2022-03-31 Asetek Danmark A/S Cooling system including a heat exchanging unit
US11880246B2 (en) * 2019-01-25 2024-01-23 Asetek Danmark A/S Cooling system including a heat exchanging unit

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