US3840067A - Air-cooled heat exchanger with reduced noise level - Google Patents

Air-cooled heat exchanger with reduced noise level Download PDF

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Publication number
US3840067A
US3840067A US00356306A US35630673A US3840067A US 3840067 A US3840067 A US 3840067A US 00356306 A US00356306 A US 00356306A US 35630673 A US35630673 A US 35630673A US 3840067 A US3840067 A US 3840067A
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United States
Prior art keywords
air
tubes
heat exchanger
fan means
cooled heat
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Expired - Lifetime
Application number
US00356306A
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English (en)
Inventor
W Bos
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.)
Lummus Technology LLC
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Lummus Co
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Filing date
Publication date
Application filed by Lummus Co filed Critical Lummus Co
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Publication of US3840067A publication Critical patent/US3840067A/en
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Classifications

    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans

Definitions

  • the exchanger may be of the forced draft type, in which the axial ventilator is located below the tubes, and forces air up around them, or of the induced draft type, in which the axial ventilator is located above the tubes and draws air up through them.
  • a second axial ventilator or fan is provided on the side of the tubes remote from the first mentioned axial ventilator in such manner that the input of the second ventilator faces the tubes. Since in the air-cooled heat exchanger according to the invention the air displacement isno longer effected by a single axial ventilator, but by two axial ventilators, it is possible to operate the fans of the ventilators at a considerably lower speed of rotation while maintaining the same cooling capacity, whereby the sound generated is substantially decreased and reduced to such a level that it is no longer annoying.
  • the exchanger comprises a frame 1 supporting one or more bundles of tubes (shown schematically) comprising a plurality of horizontal tubes 3, preferably provided with external fins 2 and connected at one end with a supply of the fluid to be cooled or condensed and at the other end with a discharge for the cooled or condensed fluid.
  • a frame 1 supporting one or more bundles of tubes (shown schematically) comprising a plurality of horizontal tubes 3, preferably provided with external fins 2 and connected at one end with a supply of the fluid to be cooled or condensed and at the other end with a discharge for the cooled or condensed fluid.
  • Frame 1 is supported by underlining structure 4 closed at the sides and is self-supported by legs 5.
  • a on cular opening in the bottom 4'of the supporting structure 4 contains an air guiding ring 6 spacedly surrounding the blade wheel of a first axial ventilator or fan 7.
  • Frame 1 is connected by means of a conical wall 8 with a cylindrical outlet ring 9 spacedly enclosing the blade wheel of a second axial ventilator or fan 10.
  • the vertical shafts l1, 12 of the blade wheels of fans 7, 10 are interconnected by the means of an intermediate shaft 13, the ends of which are connected with the shafts 11 and 12 by means of flexible couplings 14, 15; the intermediate shaft 13 is enclosed by a sleeve 16 extending through the tube bundle.
  • a further advantage is achieved when the tubes are provided with fins 2 which, in addition to aiding in cooling the fluid passing through the tubes, also serve as a guiding for the air passing over the tubes.
  • the air thereby becomes conditioned for the fan or ventilator located in the second, or upstream position in relation to the direction of the air flow.
  • the tubes of this exchanger can serve as a dual function.
  • a drive motor 17 drives the shaft 11 of the axial ventilator 7 by means of a gear 18, whereby the shaft 12 of the axial ventilator 10 is also driven to the intermediate shaft 13.
  • the axial ventilator 7 and 10 may be provided with blade wheels having adjustable blades and may be selected in such manner that they may effect together the air displacement required for the desired cooling capacity at a rotational speed of the blade wheels such that no annoying sound is generated.
  • air from the surrounding atmosphere is drawn in by the lower axial ventilator 7; the air flows in an upward direction through the space enclosed by the supporting structure 4 and along tubes 3 of the bundle, after which is drawn out by the upper ventilator 10.
  • the tubes 3 operated as a guiding system conditioning the flowing air for the upper axial ventilator 10.
  • the drawing depicts the two ventilators 7 and 10 as being driven by a common drive motor 17; however, it is equally possible to utilize a separate motor to drive each ventilator.
  • an existing air-cooled heat exchanger was equipped with a second axial ventilator. Both fans had six blades and a diameter of 14 feet. Before installation of the second fan, the single fan was operated so as to displace about 200,000 cubic feet per minute of air. This required operation of the fan at 160 rpm and total pressure of 0.52 in. water gauge, and resulted in a power (noise) level of 90.5 dB(A), which was quite annoying. With the second fan installed and in operation, a displacement of about 195,000 cubic feet per minute of air could be maintained, as total pressure of 0.51 in. water gauge, with both fans operating at only rpm. The noise level was reduced to a more bearable level of about 86 dB(A) (dB RE l0 watts).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US00356306A 1972-05-04 1973-05-02 Air-cooled heat exchanger with reduced noise level Expired - Lifetime US3840067A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7206046A NL7206046A (OSRAM) 1972-05-04 1972-05-04

Publications (1)

Publication Number Publication Date
US3840067A true US3840067A (en) 1974-10-08

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ID=19815971

Family Applications (1)

Application Number Title Priority Date Filing Date
US00356306A Expired - Lifetime US3840067A (en) 1972-05-04 1973-05-02 Air-cooled heat exchanger with reduced noise level

Country Status (3)

Country Link
US (1) US3840067A (OSRAM)
DE (1) DE2225915A1 (OSRAM)
NL (1) NL7206046A (OSRAM)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185688A (en) * 1977-12-22 1980-01-29 General Electric Company Cooler fan noise suppressor
US4490596A (en) * 1980-12-26 1984-12-25 Matsushita Electric Industrial Co., Ltd. Induction cooking apparatus having cooling arrangement therefor
US5136465A (en) * 1990-10-29 1992-08-04 International Business Machines Corp. Personal computer with tandem air flow dual fans and baffle directed air cooling
US5180003A (en) * 1992-01-14 1993-01-19 Caterpillar Inc. Dual fan cooling system
US5927391A (en) * 1997-05-29 1999-07-27 Daewoo Electronics Co., Ltd. Apparatus for cooling a condenser of a room air conditioner
US6027406A (en) * 1998-03-20 2000-02-22 Air Handling Engineering Ltd. Centrifugal fan unit with vertical rotation axis
US20040150124A1 (en) * 2002-05-17 2004-08-05 M & I Heat Transfer Products Ltd. Outlet silencer for cooling tower, evaporator cooler or condenser
US20050161202A1 (en) * 2004-01-22 2005-07-28 Hussmann Corporation Microchannel condenser assembly
US20060130517A1 (en) * 2004-12-22 2006-06-22 Hussmann Corporation Microchannnel evaporator assembly
US20100094466A1 (en) * 2008-10-14 2010-04-15 Libert Corporation Integrated quiet and energy efficient modes of operation for air-cooled condenser
CN105157446A (zh) * 2015-09-10 2015-12-16 陈盛标 一种同轴双风机冷却塔
EP2959249A4 (en) * 2013-02-22 2016-11-16 Exxonmobil Upstream Res Co SUBAQUATIC HEAT EXCHANGER
EP3207323A4 (en) * 2014-07-21 2018-01-24 Prime Datum Development Company, LLC Cooling schemes and methods for cooling tower motors
US10344846B2 (en) * 2016-09-23 2019-07-09 Bell Helicopter Textron Inc. Fan mounted on gearshaft

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3650793A1 (de) 2018-11-08 2020-05-13 Buchen KraftwerkService GmbH Verfahren und vorrichtung zur reinigung von luftkühlern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE705834C (de) * 1936-12-17 1941-05-12 Rheinmetall Borsig Akt Ges Einrichtung zum Ausnutzen des Arbeitsvermoegens der Rauchgase von Feuerungsanlagen
US3048006A (en) * 1960-12-27 1962-08-07 Alexander J E Beard Thermal current driven power generating apparatus
GB904959A (en) * 1959-03-06 1962-09-05 Happel Gmbh Air-cooled surface condenser
US3543843A (en) * 1968-08-20 1970-12-01 Hudson Products Corp Air cooled condenser apparatus
US3727679A (en) * 1971-01-02 1973-04-17 Gea Luftkuehler Happel Gmbh Mechanical draft cooling or condensing plant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE705834C (de) * 1936-12-17 1941-05-12 Rheinmetall Borsig Akt Ges Einrichtung zum Ausnutzen des Arbeitsvermoegens der Rauchgase von Feuerungsanlagen
GB904959A (en) * 1959-03-06 1962-09-05 Happel Gmbh Air-cooled surface condenser
US3048006A (en) * 1960-12-27 1962-08-07 Alexander J E Beard Thermal current driven power generating apparatus
US3543843A (en) * 1968-08-20 1970-12-01 Hudson Products Corp Air cooled condenser apparatus
US3727679A (en) * 1971-01-02 1973-04-17 Gea Luftkuehler Happel Gmbh Mechanical draft cooling or condensing plant

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185688A (en) * 1977-12-22 1980-01-29 General Electric Company Cooler fan noise suppressor
US4490596A (en) * 1980-12-26 1984-12-25 Matsushita Electric Industrial Co., Ltd. Induction cooking apparatus having cooling arrangement therefor
US5136465A (en) * 1990-10-29 1992-08-04 International Business Machines Corp. Personal computer with tandem air flow dual fans and baffle directed air cooling
US5180003A (en) * 1992-01-14 1993-01-19 Caterpillar Inc. Dual fan cooling system
US5927391A (en) * 1997-05-29 1999-07-27 Daewoo Electronics Co., Ltd. Apparatus for cooling a condenser of a room air conditioner
US6027406A (en) * 1998-03-20 2000-02-22 Air Handling Engineering Ltd. Centrifugal fan unit with vertical rotation axis
US20040150124A1 (en) * 2002-05-17 2004-08-05 M & I Heat Transfer Products Ltd. Outlet silencer for cooling tower, evaporator cooler or condenser
US6880813B2 (en) 2002-05-17 2005-04-19 M & I Heat Transfer Products Ltd. Outlet silencer for cooling tower, evaporator cooler or condenser
US20050161202A1 (en) * 2004-01-22 2005-07-28 Hussmann Corporation Microchannel condenser assembly
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
US20100094466A1 (en) * 2008-10-14 2010-04-15 Libert Corporation Integrated quiet and energy efficient modes of operation for air-cooled condenser
US10100613B2 (en) 2013-02-22 2018-10-16 Exxonmobil Upstream Research Company Subwater heat exchanger
EP2959249A4 (en) * 2013-02-22 2016-11-16 Exxonmobil Upstream Res Co SUBAQUATIC HEAT EXCHANGER
US10411561B2 (en) 2014-07-21 2019-09-10 Prime Datum Development Company, Llc Cooling schemes and methods for cooling tower motors
EP3207323A4 (en) * 2014-07-21 2018-01-24 Prime Datum Development Company, LLC Cooling schemes and methods for cooling tower motors
US10320266B2 (en) 2014-07-21 2019-06-11 Prime Datum Development Company, Llc Cooling tower having thermally managed motor
US10560001B2 (en) * 2014-07-21 2020-02-11 Prime Datum Development Company, Llc Cooling tower having thermally managed motor
US10998795B2 (en) * 2014-07-21 2021-05-04 Prime Datum Development Company, Llc Cooling schemes and methods for cooling tower motors
US20210226510A1 (en) * 2014-07-21 2021-07-22 Prime Datum Development Company, Llc Cooling Schemes And Methods For Cooling Tower Motors
US11418090B2 (en) * 2014-07-21 2022-08-16 Prime Datum Development Co., Llc Cooling tower having thermally managed motor
US20230170763A1 (en) * 2014-07-21 2023-06-01 Prime Datum Development Company, Llc Cooling tower having thermally managed motor
CN105157446A (zh) * 2015-09-10 2015-12-16 陈盛标 一种同轴双风机冷却塔
US10344846B2 (en) * 2016-09-23 2019-07-09 Bell Helicopter Textron Inc. Fan mounted on gearshaft

Also Published As

Publication number Publication date
NL7206046A (OSRAM) 1973-11-06
DE2225915A1 (de) 1973-11-15

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