GB1176535A - Heat Exchanger - Google Patents

Heat Exchanger

Info

Publication number
GB1176535A
GB1176535A GB5135/67A GB513567A GB1176535A GB 1176535 A GB1176535 A GB 1176535A GB 5135/67 A GB5135/67 A GB 5135/67A GB 513567 A GB513567 A GB 513567A GB 1176535 A GB1176535 A GB 1176535A
Authority
GB
United Kingdom
Prior art keywords
fan
heat exchanger
air
feb
nemours
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
Application number
GB5135/67A
Inventor
Ralph Thompson Mathews
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1176535A publication Critical patent/GB1176535A/en
Expired legal-status Critical Current

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
    • F28D5/00—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, using the cooling effect of natural or forced evaporation
    • F28D5/02—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, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
    • 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
    • F28D5/00—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, using the cooling effect of natural or forced evaporation
    • 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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F25/00—Component parts of trickle coolers
    • F28F25/10—Component parts of trickle coolers for feeding gas or vapour
    • F28F25/12—Ducts; Guide vanes, e.g. for carrying currents to distinct zones
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0135—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0135—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening
    • F28F9/0136—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening formed by intersecting strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/30—Safety or protection arrangements; Arrangements for preventing malfunction for preventing vibrations
    • 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
    • Y10S165/90—Cooling towers
    • 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
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/11—Cooling towers

Landscapes

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

Abstract

1,176,535. Axial-flow fans. E.I. DUPONT DE NEMOURS & CO. Feb.2, 1967 [Feb. 3, 1966], No. 5135/67. Heading F1C. [Also in Division F4] In an air-cooled heat exchanger, a fan 15 is protected from heat exposure by air passing over the drive motor 27 and gear-box 28 of the fan, the air being induced through thermally-insulated ducts 26 and a draft tube 29 by the action of the fan 15.
GB5135/67A 1966-02-03 1967-02-02 Heat Exchanger Expired GB1176535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US524712A US3384165A (en) 1966-02-03 1966-02-03 Heat exchanger

Publications (1)

Publication Number Publication Date
GB1176535A true GB1176535A (en) 1970-01-07

Family

ID=24090364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5135/67A Expired GB1176535A (en) 1966-02-03 1967-02-02 Heat Exchanger

Country Status (5)

Country Link
US (1) US3384165A (en)
DE (1) DE1551489A1 (en)
FR (1) FR1509810A (en)
GB (1) GB1176535A (en)
NL (1) NL6701536A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53127308U (en) * 1977-03-18 1978-10-09
JPS53127309U (en) * 1977-03-18 1978-10-09
JPS5446010U (en) * 1977-09-07 1979-03-30
JPS5454310A (en) * 1977-10-07 1979-04-28 Fuji Electric Co Ltd Cooling apparatus for device installed inside heat air pathway in which air is blown by blower
FR2516221A1 (en) * 1981-11-12 1983-05-13 Technibel Sa HEAT PUMP
GB2120775A (en) * 1982-04-15 1983-12-07 Mckenzie Martin Limited Louvre assemblies
GB2131153A (en) * 1982-11-12 1984-06-13 Gen Electric Heat exchanger
GB2143631A (en) * 1983-07-18 1985-02-13 Dieter Wurz A finned tube arrangement
EP1496326A1 (en) * 2003-07-10 2005-01-12 Balcke-Dürr GmbH Method and apparatus for guiding air in air-cooled condensers
US8302670B2 (en) 2007-12-28 2012-11-06 Spx Cooling Technologies, Inc. Air guide for air cooled condenser
EP3685112A4 (en) * 2017-09-19 2021-06-16 Evapco, Inc. Air-cooled heat transfer device with integrated and mechanized air pre-cool system

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* Cited by examiner, † Cited by third party
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DE1601127B2 (en) * 1967-02-08 1974-08-08 Gkn Birwelco Ltd., Aston, Birmingham, Warwickshire (Grossbritannien) Cooling system with a cooling tower working with natural draft
US3472042A (en) * 1967-09-01 1969-10-14 Frick Co Evaporative condenser
BE754580A (en) * 1969-08-08 1971-01-18 Balcke Maschbau Ag PROCESS FOR THE OPERATION OF A DRY REFRIGERATION TOWER UNDER HIGH AIR TEMPERATURES
DE1962061C3 (en) * 1969-12-11 1979-05-10 Kraftwerk Union Ag, 4330 Muelheim Air condensation system
CA964187A (en) * 1970-06-29 1975-03-11 John Engalitcheff (Jr.) Injector type evaporative heat exchanger
BE790512A (en) * 1971-10-25 1973-02-15 Tyeploelektroprojekt CONDENSATION SYSTEM FOR PLANTS EQUIPPED WITH STEAM TURBINES
GB1483730A (en) * 1973-12-08 1977-08-24 Gkn Birwelco Ltd Heat exchanger assemblies
DE2547719C2 (en) * 1975-10-24 1983-01-13 Ernst, Günter, Prof.Dr.-Ing., 7500 Karlsruhe Noise abatement device in a cooling tower
US4149588A (en) * 1976-03-15 1979-04-17 Mcdonnell Douglas Corporation Dry cooling system
DE2836053C3 (en) * 1978-08-17 1981-04-09 Kraftwerk Union AG, 4330 Mülheim Control device for air flaps in a cooling tower with cooling elements arranged in a delta
US4422983A (en) * 1982-06-16 1983-12-27 Ceramic Cooling Tower Company Fiberglass reinforced cooling tower
US4437512A (en) 1982-11-24 1984-03-20 Harsco Corporation Heat exchanger assembly
FR2543282A1 (en) * 1983-03-21 1984-09-28 Bertin & Cie CLOSED REFRIGERANT WITH FORCED VENTILATION AND WATERTIGHT CIRCUIT
US4595297A (en) * 1985-10-15 1986-06-17 Shell Oil Company Method and apparatus for measure of heat flux through a heat exchange tube
HU193135B (en) * 1985-10-24 1987-08-28 Energiagazdalkodasi Intezet Auxiliary plant for operating air-cooled equipments particularly preventing winter injuries and air-cooled cooling tower provided with such auxiliary plant
CA1323496C (en) * 1989-04-03 1993-10-26 Gyorgy Palfalvi Air condenser installation
US5277547A (en) * 1991-05-18 1994-01-11 Usui Kokusai Sangyo Kaisha Ltd. Motor fan unit
US5227095A (en) * 1991-11-27 1993-07-13 Curtis Harold D Modular cooling tower
US5566745A (en) * 1993-05-10 1996-10-22 General Electric Company Shuttered radiator system with control
US5487849A (en) * 1993-12-03 1996-01-30 Tower Tech, Inc. Pultruded cooling tower construction
US5545356A (en) * 1994-11-30 1996-08-13 Tower Tech, Inc. Industrial cooling tower
EP0730131A1 (en) * 1995-02-24 1996-09-04 Gea-Erge-Spirale Et Soramat (S.A.) Cooling apparatus for a fluid or for condensation of steam
US5958306A (en) * 1997-10-16 1999-09-28 Curtis; Harold D. Pre-collectors for cooling towers
US6250610B1 (en) * 1998-08-26 2001-06-26 Delta Cooling Towers, Inc. Molded cooling tower
US6497401B2 (en) 1999-08-23 2002-12-24 Delta Cooling Towers, Inc. Molded cooling tower
AU751294C (en) * 2001-07-13 2005-04-07 Baltimore Aircoil Company Inc. System and method of cooling
US6988538B2 (en) * 2004-01-22 2006-01-24 Hussmann Corporation Microchannel condenser assembly
US20060130517A1 (en) * 2004-12-22 2006-06-22 Hussmann Corporation Microchannnel evaporator assembly
DE102006029773B3 (en) * 2006-06-27 2007-07-12 Gea Energietechnik Gmbh Construction of condensation installation for power stations comprises placing tubular bundles with their sheet metal bases holding heat exchanger tubes in supports on a stepped strut or a pre-assembled part
US7743821B2 (en) * 2006-07-26 2010-06-29 General Electric Company Air cooled heat exchanger with enhanced heat transfer coefficient fins
ITMI20061708A1 (en) * 2006-09-07 2008-03-08 Luve Spa BEARING STRUCTURE, PARTICULARLY FOR LIQUID CONDENSERS AND COOLERS OF LARGE POWER
US20100162737A1 (en) * 2007-06-14 2010-07-01 Muller Industries Australia Pty Ltd. System and method of wetting adiabatic material
CA2739755A1 (en) * 2008-10-08 2010-04-15 A-Heat Allied Heat Exchange Technology Ag Heat exchanger arrangement and method for the operation of same
NO329262B1 (en) * 2008-10-28 2010-09-20 Statoilhydro Asa Air cooled heat exchanger
US20150330710A1 (en) * 2009-03-03 2015-11-19 Harold D. Curtis Revocable Trust Direct Forced Draft Fluid Cooling Tower
CA2752644A1 (en) 2009-03-03 2010-09-30 Harold Dean Curtis Direct forced draft fluid cooler/cooling tower and liquid collector therefor
US8585024B2 (en) * 2009-08-26 2013-11-19 Aggreko, Llc Cooling tower
US20120012292A1 (en) * 2010-07-16 2012-01-19 Evapco, Inc. Evaporative heat exchange apparatus with finned elliptical tube coil assembly
US8695741B2 (en) * 2011-04-01 2014-04-15 Agco Corporation Pusher airflow for work vehicle cooling system
CN102260559B (en) * 2011-05-31 2014-06-18 千秋能源（上海）有限公司 High-quality coal product production plant and production system
DE102011050956B4 (en) 2011-06-09 2014-05-22 Daniel Seufferheld cooling device
US9551532B2 (en) * 2012-05-23 2017-01-24 Spx Dry Cooling Usa Llc Modular air cooled condenser apparatus and method
DK2696159T3 (en) * 2012-08-09 2017-11-20 A-Heat Allied Heat Exchange Tech Ag Heat exchanger and method for wetting heat exchangers
US9335098B2 (en) * 2013-03-12 2016-05-10 Copper Core Limited V-shaped heat exchanger apparatus
FR3006043B1 (en) * 2013-05-27 2016-10-07 Gea Erge Spirale & Soramat COOLING UNIT AND COOLING METHOD
DE102013214839A1 (en) * 2013-07-30 2015-02-05 Siemens Aktiengesellschaft cooler arrangement
US11029059B2 (en) * 2013-10-01 2021-06-08 Amazon Technologies, Inc. Passive cooling system with ambient fluid collection
WO2015057298A1 (en) * 2013-10-17 2015-04-23 Carrier Corporation Motor and drive arrangement for refrigeration system
US10107001B2 (en) 2014-03-28 2018-10-23 Syntech Towers, L.L.C. CMU cooling tower and method of construction
NL2014380B1 (en) * 2015-03-02 2017-01-17 Eco-Logical Entpr B V Enthalpy exchanger.
WO2016169076A1 (en) * 2015-04-23 2016-10-27 赵元宾 Column type cooling tube bundle with wedge-shaped gap
USD802108S1 (en) 2016-01-04 2017-11-07 Delta T Corporation Condenser
US10480820B2 (en) 2016-04-10 2019-11-19 Forum Us, Inc. Heat exchanger unit
US10533881B2 (en) 2016-04-10 2020-01-14 Forum Us, Inc. Airflow sensor assembly for monitored heat exchanger system
US10545002B2 (en) 2016-04-10 2020-01-28 Forum Us, Inc. Method for monitoring a heat exchanger unit
US10502597B2 (en) 2016-04-10 2019-12-10 Forum Us, Inc. Monitored heat exchanger system
US10514205B2 (en) * 2016-04-10 2019-12-24 Forum Us, Inc. Heat exchanger unit
EP3452771B1 (en) * 2016-05-03 2022-08-31 Carrier Corporation Heat exchanger arrangement
EP3465062B1 (en) 2016-05-25 2021-02-24 SPG Dry Cooling Belgium Air-cooled condenser apparatus and method
RU2635727C1 (en) * 2016-07-18 2017-11-15 Феликс Мубаракович Давлетшин Water cooling unit of water circulation system
ES2761695T3 (en) * 2016-08-24 2020-05-20 Spg Dry Cooling Belgium Induced draft air cooled condenser
US10775117B2 (en) 2016-09-30 2020-09-15 Baltimore Aircoil Company Water collection/deflection arrangements
GB201703694D0 (en) * 2017-03-08 2017-04-19 Aggreko Uk Ltd Enhanced cooling for generator
DE102017107300B4 (en) * 2017-04-05 2021-03-18 Cabero Beteiligungs-Gmbh Cooling system
US10852079B2 (en) 2017-07-24 2020-12-01 Harold D. Curtis Apparatus for cooling liquid and collection assembly therefor
US10677543B2 (en) * 2017-08-31 2020-06-09 Baltimore Aircoil Company, Inc. Cooling tower
FR3072769A1 (en) 2017-10-23 2019-04-26 Suez Groupe DEVICE AND METHOD FOR CONDENSING WATER VAPOR FROM A TURBINE
US11852419B1 (en) * 2018-03-29 2023-12-26 Hudson Products Corporation Air-cooled heat exchanger with tab and slot frame
CA3009337A1 (en) 2018-06-26 2019-12-26 Copper Core Limited Heat exchanger assembly with heat shielding duct
DE102019110236A1 (en) * 2019-04-18 2020-10-22 Güntner Gmbh & Co. Kg Heat exchanger arrangement with at least one multi-pass heat exchanger and method for operating a heat exchanger arrangement
US11946667B2 (en) 2019-06-18 2024-04-02 Forum Us, Inc. Noise suppresion vertical curtain apparatus for heat exchanger units
PL3786560T3 (en) * 2019-08-30 2022-03-07 Ovh Heat exchanger assembly
US20210254898A1 (en) * 2020-02-19 2021-08-19 Evapco, Inc. Double stack v heat exchanger
WO2021178802A1 (en) * 2020-03-06 2021-09-10 Holtec International Induced draft air-cooled condenser system
US11609051B2 (en) 2020-04-13 2023-03-21 Harold D. Revocable Trust Apparatus for cooling liquid and collection assembly therefor

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US2650802A (en) * 1947-09-19 1953-09-01 Huet Andre Countercurrent heat exchanger
US2680603A (en) * 1951-11-06 1954-06-08 Foster Wheeler Corp Cooling tower
GB900407A (en) * 1958-12-24 1962-07-04 Happel Ges Mit Beschraenkter H Improvements in air cooled vapor condensers
DE1263789B (en) * 1959-03-06 1968-03-21 Gea Luftkuehler Happel Gmbh Air-cooled surface condenser
US3148516A (en) * 1963-01-21 1964-09-15 Niagara Blower Co Air cooled vacuum producing condenser

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53127308U (en) * 1977-03-18 1978-10-09
JPS53127309U (en) * 1977-03-18 1978-10-09
JPS5446010U (en) * 1977-09-07 1979-03-30
JPS5454310A (en) * 1977-10-07 1979-04-28 Fuji Electric Co Ltd Cooling apparatus for device installed inside heat air pathway in which air is blown by blower
FR2516221A1 (en) * 1981-11-12 1983-05-13 Technibel Sa HEAT PUMP
EP0079834A1 (en) * 1981-11-12 1983-05-25 TECHNIBEL, Société Anonyme dite: Heat pump
GB2120775A (en) * 1982-04-15 1983-12-07 Mckenzie Martin Limited Louvre assemblies
GB2131153A (en) * 1982-11-12 1984-06-13 Gen Electric Heat exchanger
GB2143631A (en) * 1983-07-18 1985-02-13 Dieter Wurz A finned tube arrangement
EP1496326A1 (en) * 2003-07-10 2005-01-12 Balcke-Dürr GmbH Method and apparatus for guiding air in air-cooled condensers
US8302670B2 (en) 2007-12-28 2012-11-06 Spx Cooling Technologies, Inc. Air guide for air cooled condenser
EP3685112A4 (en) * 2017-09-19 2021-06-16 Evapco, Inc. Air-cooled heat transfer device with integrated and mechanized air pre-cool system

Also Published As

Publication number Publication date
NL6701536A (en) 1967-08-04
US3384165A (en) 1968-05-21
DE1551489A1 (en) 1970-03-19
FR1509810A (en) 1968-01-12

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