US3716097A - Air condensation plant - Google Patents

Air condensation plant Download PDF

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Publication number
US3716097A
US3716097A US00096071A US3716097DA US3716097A US 3716097 A US3716097 A US 3716097A US 00096071 A US00096071 A US 00096071A US 3716097D A US3716097D A US 3716097DA US 3716097 A US3716097 A US 3716097A
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United States
Prior art keywords
air
cooling
cooling elements
plant according
condensation plant
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Expired - Lifetime
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US00096071A
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English (en)
Inventor
F Kelp
H Pohl
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Kraftwerk Union AG
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Kraftwerk Union AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/003—Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits
    • 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
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/005—Auxiliary systems, arrangements, or devices for protection against freezing

Definitions

  • Tick [5 7 ABSTRACT Air condensation plant for condensing steam by direct air cooling includes mutually transversely disposed elongated cooling elements traversible by steam along the length thereof, means for directing a flow of air to a respective side of said cooling elements, adjustable means for covering the side respectively of the cooling elements for controlling the cooling thereof and for preventing freezing, the cooling elements having an upper part through which a preponderant quantity of the steam to be condensated flows, the adjustable covering means being located in front of the upper part of the cooling elements.
  • the invention relates to air condensation plant for condensing steam, especially exhaust steam turbines by direct air cooling.
  • Air condensation plants of this general type have been used with respect to the cooling surfaces and'the quantity of cooling air for specific operating relationships, for example for measuring total output of the steam turbine for mean cooling air temperature.
  • a specific reduction in efficiency must be taken into consideration because the condensate temperature and therewith exhaust steam pressure increase to predetermined amount.
  • the condensation plant is to operate at very low air temperatures and also at very low loading of the'steam turbine, and with quantities of steam that are reduced with respect to the normal rating danger of freezing.
  • the quantity of cooling air be reduced by suitably changing the rotary speed or the position ofthe blades ofthe fans or blowers.
  • air condensation plant for condensing steam by direct air cooling which comprises mutually transversely disposed'elongated cooling elements traversible by steam along the length thereof, means for directing a flow of air to a respective side of said cooling elements, 1 adjustable means for covering the side, respectively, of
  • the cooling elements for controlling the cooling thereof and for preventing freezing, the cooling elements having an upper part through which a preponderant quantity of the steam to be condensated flows, the adjustable covering means being located in front of the upper part of the cooling elements.
  • the cooling elements are disposed either perpendicularly or inclined with respect to one another.
  • the adjustable covering means are in the form of flaps, jalousies, roller blinds or the like.
  • dephlegmator operation of the condensation plant is dispensed with, and steam and condensate can flow in the same direction as is conventional for normal condensation plants.
  • Adjustable flaps that had been heretofore'mounted at the cooling elements were generally located in the lower part or region of the-cooling elements. In these heretofore known plants however icing occurred and, in fact, frost damage occurred in the cooling tubes at the level of the upper edge of the flaps because the local cooling action through a greater air velocity was even stronger than before due to the heat transfer value improved thereby. No change occurs therein if the flaps are mounted at the cooling air discharge or outlet side of the cooling element. Since the lower half of the cooling tubes is then further subjected to the blast of the cooling air, danger of freezing is still present at least to the same extent to the condensate further condensed at the top of the cooling tubes.
  • adjustable covering means are mounted in the upper part of the cooling elements on the air inlet side thereof, which covering means more or less greatly cover the cooling surfaces when there is danger of freezing, can a supercooling or undercooling of the condensate in the still active cooling surfaces of the cooling elements be markedly prevented, if necessary in connection with additional reduction of the cooling air flow.
  • the flow of cooling air can be additionally reduced arbitrarily or automatically by adjusting of the covering means.
  • the adjustable covering means are formed in a relatively simple manner by flaps. It is possible however to employ in place thereof, jalousies or rolling blinds as long as care is taken that no flutter phenomena occur in the air current.
  • pivotable flaps which are pivotable about an axis extending along the upper inner edge of the cooling element.
  • the pivot axes for the flaps of both cooling elements are located in the angle defined by the mutually inclined cooling elements, and accordingly the flaps are freely suspended in vertical position in the rest or neutral position thereof.
  • the flaps are additionally provided, in accordance with another feature of the invention, with elongating or widening portions in order to increase the covering surface. Such elongating or widening portions are slidably secured to the pivotable flaps.
  • FIGS. 1 and 2 are greatly simplified and partly schematic, vertical sectional views of two differentembodiments of the air condensation plants of our invention.
  • FIG. 1 there is shown therein, in section, an
  • a fan or blower 6 is located below the steam line 1 and cooling element 2, 3 assembly and is driven by an electric motor 7.
  • the entire air condensation plant is mounted on a platform 8.
  • flaps 9 and 10 are mounted in the angle defined by the inclined cooling elements 2 and 3.
  • the flap 9 is shown in so-called neutral or rest position
  • the cooling element 2 in the illustrated position of the flap 9 of FIG. 1, is subjected fully and without change to the cooling flow from the flower 6.
  • the cooling air flows in direction onto the entire length of the cooling element 2 and engages the cooling tubes 4 along the entire length thereof.
  • the flap 10 is shown in the position-which characterizes the operation when there is danger of freezing.
  • a suitably reduced quantity of cooling air then flows in direction of the arrows 12 through only the lower part of the cooling element 3 so that condensation occurs only in the lower part of the cooling tubes 4.
  • the flaps 9 and 10 are pivotable in direction of the arrows 13 and 14; generally both flaps 9 and 10 being simultaneously pivotable. Only in the event of unusual operating circumstances, for example, if one of the cooling elements 2 and 3 is exposed to powerful solar irradiation while the other of the cooling elements is being simultaneously subjected to a cold wind, can an asymmetrical flap adjustment be made.
  • the air cover flaps are of multipartite construction.
  • the flap 15, which is shown in neutral or rest position in FIG. 2, is formed of a pivotable portion 15a and a portion 15b slideably mounted thereon so as to serve as an elongation member.
  • the slideable portion 15b, as shown, is slid alongside almost the entire length of the pivotable portion 15a in the rest position of the flap 15.
  • a' flap 17 On the righthand side of FIG. 2, there is shown a' flap 17 in a position wherein it is fully pivoted against the cooling element 3, the flap 17 being formed of a pivotable flap portion 170 and a slideable elongation portion 17b mounted thereon and slid into its outermost extending position in the figure. 1
  • pivotable flaps 16 and 18 are mounted at the outside of the cooling elements 2 and 3 in the lower region, respectively thereof, in order thereby to counter or offset extreme conditions of freezing danger.
  • the flap 16 for the cooling'element 2 isshown in normal or neutral position while, in accordance with the illustrated position of the pivotable flap 17 which is extended alongside the cooling element 3 is also pivoted into a position alongside and against the same.
  • An operative means for quite extreme conditions is thus represented by the layout of the flaps l7 and 18 alongside the cooling element 3.
  • the spacing a between the cooling tubes 4 of the embodiment of FIG. 2 is enlarged to such an extent with respect to the corresponding spacing between the cooling tubes 4 of the embodiment of FIG. 1, so that the cooling air from the blower 6, as represented by the arrows 12, is able to flow in the cooling element 3 along a considerable distance parallel to the tubes 4., the flow path of the cooling air being defined or predetermined by the flaps 17 and 18.
  • a suitable regulating device 20 which receives measurement signals over signal lines 21 and 22 from suitable condensate temperature measuring sensors located in the condensate collecting lines or manifolds 5 and 5'.
  • a suitable temperature measurement signal controlled by the outside temperature is fed to the regulating device 20 over a signal line 24 from a measuring location 23.
  • temperature measurements of supplied and discharged coolingair can be obtained at suitable locations.
  • Conventional command transmitters 25, 26 and 27 are connected to the control device 20 for transmitting adjusting commands that are represented by the lines of action 28 and 29 for suitably adjusting the pivotable flaps l5 and 17.
  • suitable telechron or adjustment motors for example, are located at the respective pivots of the flaps and are properly energizable in .accordance with the signals transmitted thereto for adjusting the flaps.
  • an action line 30 is shown through which the polerever'sible or adjustable speed drive motor 7 of the blower 6 is influenced or adjustably controlled.
  • the flaps 16 and 18 are adjustable over the represented action lines 31 and 32.
  • this control system can be constructed so that after the executed closing of the covering devices or flaps on the sides toward which the air flow is directed and after the quantity of cooling air has been diminished, at the required or demanded further reduction in the quantity of cooling air, it causes an adjustment of the covering devices on the sides of the cooling elements from which the air flow is discharged in the closing sense depending upon the reduction in the air throughput quantity.
  • a command to adjust the covering devices or flaps at the air flow discharge side of the cooling elements is given as the last stage for constant or step-wise reduction in the air-blowing output.
  • a control or regulating device which satisfies these requirements can contain a series circuit or sequential connection which, when the air-blowing power is reduced, first ensures that the upper covering devices at the sides of the cooling elements to which the air flow is directed, are increasingly closed. As the next stage, after the executed-full closing of these covering devices, an even further reduction of the air flow throughput is then produced. Finally, after attaining adjustment of the air blower output at its lowest value, the outer covering devices are closed.
  • Use may also be made, thereby, of an automatic adjustment wherein suitable flaps are placed in neutral or rest position thereof by weight or spring loading in closed condition and are fully opened only by the cooling air flow. If the quantity of cooling air should then drop below a specific minimum value, automatic closing of the covering devices or flaps is effected by spring force or weight-loading.
  • Air condensation plant according to claim 1 wherein said cooling elements extend at an inclination toward one another.
  • Air condensation plant according to claim 1, wherein said cover means are adjustable so as to progressively increase the area of the side of the respective cooling elements that is covered thereby, said air flow directing means being adjustable for reducing the flow of cooling air to the respective side of said cooling element.
  • Air condensation plant according to claim 1 wherein said adjustable flaps are pivotable about an axis extending along the upper inner edge of said cooling elements.
  • Air condensation plant including a symmetrical assembly of two of said cooling elements leaning toward one another at an inclined angle, the adjustable flaps ofboth said cooling elements being pivotbale about axes located in the angle defined by said cooling elements, said flaps, in neutral position thereof, being suspended substantially vertically.
  • Air condensation plant wherein said cooling elements have a lower portion of the respective side thereof to which the flow of air is directed by said directing means, said adjustable covering means being located at said lower portion.
  • cooling elements each comprise a plurality of cooling'tubes spaced from one another soas to form a flow path forfthe cooling air substantially parallel to said cooling tubes.
  • Air condensation plant according to claim 1, wherein said cooling elements, respectively, have an inlet side for the air flow directed by said directing means, and a discharge side for the air flow passing through said cooling elements, and including control means for issuing control commands for reducing the air flow from said flow directing means simultaneously with the adjustment of said covering means.
  • Air condensation plant including adjustable covering means located at said discharge side of said cooling elements, said control means being adapted to issue control commands for reducing the air flow from said flow directing means simultaneously with the adjustment of said covering means at said discharge side of said cooling elements,
  • Air condensation plant according to claim 12, wherein said condensation operating value is the condensate temperature, said adjustment being effective in accordance with said condensate temperature with respect to the temperature of the outer air and the temperatures of the cooling air flow at said inlet and outlet sides of said cooling elements.
  • Air condensation plant wherein said air flow directing means is adjustable for reducing the output thereof to a minimum, said control device being thereby actuable for simultaneously closing said covering means at said discharge sideof said cooling elements.
  • Air condensation plant wherein said control device is connected in a series circuit for closing said covering means at said inlet side at an initially slight reduction of the air flow output of said air flow directing means, for further reducing the air flow after said covering means is completely closed, and for closing said covering means at said discharge side after air flow is reduced ,to a minimum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air-Flow Control Members (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Greenhouses (AREA)
US00096071A 1969-12-11 1970-12-08 Air condensation plant Expired - Lifetime US3716097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1962061A DE1962061C3 (de) 1969-12-11 1969-12-11 Luftkondensationsanlage

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US3716097A true US3716097A (en) 1973-02-13

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US00096071A Expired - Lifetime US3716097A (en) 1969-12-11 1970-12-08 Air condensation plant

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US (1) US3716097A (de)
DE (1) DE1962061C3 (de)
ES (1) ES386320A1 (de)
GB (1) GB1333764A (de)
ZA (1) ZA708031B (de)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882929A (en) * 1973-08-16 1975-05-13 Ormat Turbines Heat rejection system
US3908752A (en) * 1973-08-16 1975-09-30 William R Padden Vertical blower coil unit for heating and cooling
US3958628A (en) * 1973-08-16 1976-05-25 Padden William R Vertical blower coil unit for heating and cooling
US4031953A (en) * 1974-12-23 1977-06-28 Caterpillar Tractor Co. Heat exchanger system and ducting arrangement therefor
US4244422A (en) * 1975-11-18 1981-01-13 Aktiebolaget Carl Munters Method and device for defrosting heat exchanger without impairment of its heat exchange efficiency
US4450899A (en) * 1980-10-27 1984-05-29 Flakt Aktiebolag Method of regulating an outdoor steam condensor and apparatus for performing said method
US4458665A (en) * 1981-05-04 1984-07-10 Kool-Fire Limited Heat exchanger with baffle plates
US4485642A (en) * 1983-10-03 1984-12-04 Carrier Corporation Adjustable heat exchanger air bypass for humidity control
US4909309A (en) * 1989-04-03 1990-03-20 Energiagazdalkodasi Intezet Air condenser installation
US5159974A (en) * 1992-01-06 1992-11-03 Hudson Products Corporation Steam condenser with articulated electrically heated blankets or panels
US5214935A (en) * 1990-02-20 1993-06-01 Allied-Signal Inc. Fluid conditioning apparatus and system
US5664431A (en) * 1996-04-22 1997-09-09 Martin, Sr.; Lendell Drain pan
US5987909A (en) * 1998-08-31 1999-11-23 Martin, Sr.; Lendell Air conditioner drain pan
US6276443B1 (en) 1999-11-29 2001-08-21 Lendell Martin, Sr. Air conditioning coil
US6474272B2 (en) * 1999-08-10 2002-11-05 Gea Energietechnik Gmbh Apparatus for condensation of steam
US20050047974A1 (en) * 2003-08-31 2005-03-03 Lendell Martin Plenum systems
WO2006125419A1 (de) * 2005-05-23 2006-11-30 Gea Energietechnik Gmbh Kondensationsanlage
US20070163295A1 (en) * 2006-01-18 2007-07-19 Martin Lendell Sr Air treatment systems
US20070193725A1 (en) * 2006-02-23 2007-08-23 Tri-X-Flo, L.L.C. Triangular shaped heat exchanger
US20080196435A1 (en) * 2005-05-23 2008-08-21 Heinrich Schulze Condensation Plant
US20090120622A1 (en) * 2006-03-09 2009-05-14 Knuerr Ag Heat Exchanger and Method For Cooling Network Cabinets
US20090178279A1 (en) * 2006-06-27 2009-07-16 Gea Energietechnik Gmbh Method for setting up a condensation facility
US20120247728A1 (en) * 2011-04-01 2012-10-04 Agco Corporation Control method for primary and supplemental cooling systems for a work vehicle
USD786413S1 (en) 2016-04-18 2017-05-09 Lendell Martin, Sr. Air processor
CN107543427A (zh) * 2017-09-15 2018-01-05 双良节能系统股份有限公司 一种直接空冷凝汽器防冻控制方法
US10533772B2 (en) 2017-02-01 2020-01-14 Trane International Inc. Movable air-flow guide vane for a furnace
US10619952B2 (en) 2014-10-13 2020-04-14 Guentner Gmbh & Co. Kg Method for operating a heat exchanger system and heat exchanger system
US20200318909A1 (en) * 2017-09-27 2020-10-08 Holtec International Air-cooled condenser system
EP3688396A4 (de) * 2017-09-27 2021-06-23 Holtec International Luftgekühltes kondensatorsystem
USD927664S1 (en) 2019-02-13 2021-08-10 Lendell Martin, Sr. Air handler
US11796255B2 (en) 2017-02-24 2023-10-24 Holtec International Air-cooled condenser with deflection limiter beams

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012782B1 (de) * 1978-12-21 1983-06-01 Hamon-Sobelco S.A. Kühlturm
US5129456A (en) * 1987-05-08 1992-07-14 Energiagazdalkodasi Intezet Dry-operated chimney cooling tower
DE202011003939U1 (de) * 2011-03-14 2011-05-19 Cabero Wärmetauscher GmbH & Co. KG, 82284 Wärmeübertragungseinheit
CN106370027B (zh) * 2016-09-27 2019-10-29 山东大学 一种直接空冷凝汽器防冻结构、系统及方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619621A (en) * 1927-03-01 Radiator-shutter
US2826395A (en) * 1954-07-19 1958-03-11 Hudson Engineering Corp Atmospheric heat exchange apparatus and fan therefor
GB900407A (en) * 1958-12-24 1962-07-04 Happel Ges Mit Beschraenkter H Improvements in air cooled vapor condensers
GB902604A (en) * 1958-06-04 1962-08-01 Happel Gmbh An improved process and apparatus for condensing vapours and cooling the condensate
US3175960A (en) * 1960-08-16 1965-03-30 Gea Luftkuehler Happel Gmbh Air cooled condenser for distilling apparatus
US3384165A (en) * 1966-02-03 1968-05-21 Du Pont Heat exchanger
US3543843A (en) * 1968-08-20 1970-12-01 Hudson Products Corp Air cooled condenser apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619621A (en) * 1927-03-01 Radiator-shutter
US2826395A (en) * 1954-07-19 1958-03-11 Hudson Engineering Corp Atmospheric heat exchange apparatus and fan therefor
GB902604A (en) * 1958-06-04 1962-08-01 Happel Gmbh An improved process and apparatus for condensing vapours and cooling the condensate
GB900407A (en) * 1958-12-24 1962-07-04 Happel Ges Mit Beschraenkter H Improvements in air cooled vapor condensers
US3175960A (en) * 1960-08-16 1965-03-30 Gea Luftkuehler Happel Gmbh Air cooled condenser for distilling apparatus
US3384165A (en) * 1966-02-03 1968-05-21 Du Pont Heat exchanger
US3543843A (en) * 1968-08-20 1970-12-01 Hudson Products Corp Air cooled condenser apparatus

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882929A (en) * 1973-08-16 1975-05-13 Ormat Turbines Heat rejection system
US3908752A (en) * 1973-08-16 1975-09-30 William R Padden Vertical blower coil unit for heating and cooling
US3958628A (en) * 1973-08-16 1976-05-25 Padden William R Vertical blower coil unit for heating and cooling
US4031953A (en) * 1974-12-23 1977-06-28 Caterpillar Tractor Co. Heat exchanger system and ducting arrangement therefor
US4244422A (en) * 1975-11-18 1981-01-13 Aktiebolaget Carl Munters Method and device for defrosting heat exchanger without impairment of its heat exchange efficiency
US4450899A (en) * 1980-10-27 1984-05-29 Flakt Aktiebolag Method of regulating an outdoor steam condensor and apparatus for performing said method
US4458665A (en) * 1981-05-04 1984-07-10 Kool-Fire Limited Heat exchanger with baffle plates
US4485642A (en) * 1983-10-03 1984-12-04 Carrier Corporation Adjustable heat exchanger air bypass for humidity control
US4909309A (en) * 1989-04-03 1990-03-20 Energiagazdalkodasi Intezet Air condenser installation
US5214935A (en) * 1990-02-20 1993-06-01 Allied-Signal Inc. Fluid conditioning apparatus and system
US5159974A (en) * 1992-01-06 1992-11-03 Hudson Products Corporation Steam condenser with articulated electrically heated blankets or panels
US5664431A (en) * 1996-04-22 1997-09-09 Martin, Sr.; Lendell Drain pan
US5987909A (en) * 1998-08-31 1999-11-23 Martin, Sr.; Lendell Air conditioner drain pan
US6474272B2 (en) * 1999-08-10 2002-11-05 Gea Energietechnik Gmbh Apparatus for condensation of steam
US6276443B1 (en) 1999-11-29 2001-08-21 Lendell Martin, Sr. Air conditioning coil
US20050047974A1 (en) * 2003-08-31 2005-03-03 Lendell Martin Plenum systems
US20080210403A1 (en) * 2005-05-23 2008-09-04 Gea Energietechnil Gmbh Condensation Plant
US20080196435A1 (en) * 2005-05-23 2008-08-21 Heinrich Schulze Condensation Plant
WO2006125419A1 (de) * 2005-05-23 2006-11-30 Gea Energietechnik Gmbh Kondensationsanlage
AU2006251720B2 (en) * 2005-05-23 2009-05-21 Gea Energietechnik Gmbh Condensing system
US20070163295A1 (en) * 2006-01-18 2007-07-19 Martin Lendell Sr Air treatment systems
US20070193725A1 (en) * 2006-02-23 2007-08-23 Tri-X-Flo, L.L.C. Triangular shaped heat exchanger
US7497250B2 (en) * 2006-02-23 2009-03-03 Tri-X-Flo, L.L.C. Triangular shaped heat exchanger
US20090120622A1 (en) * 2006-03-09 2009-05-14 Knuerr Ag Heat Exchanger and Method For Cooling Network Cabinets
US20090178279A1 (en) * 2006-06-27 2009-07-16 Gea Energietechnik Gmbh Method for setting up a condensation facility
AU2007264231B2 (en) * 2006-06-27 2009-09-24 Gea Energietechnik Gmbh Method for setting up a condensation plant
US8191259B2 (en) * 2006-06-27 2012-06-05 Gea Energietechnik Gmbh Method for setting up a condensation facility using a pre-assembly frame and a welded root and finish seam
US8590650B2 (en) * 2011-04-01 2013-11-26 Agco Corporation Cooling package assembly for work vehicles
US20120247728A1 (en) * 2011-04-01 2012-10-04 Agco Corporation Control method for primary and supplemental cooling systems for a work vehicle
US20120247712A1 (en) * 2011-04-01 2012-10-04 Agco Corporation Cooling package assembly for work vehicles
US10619952B2 (en) 2014-10-13 2020-04-14 Guentner Gmbh & Co. Kg Method for operating a heat exchanger system and heat exchanger system
USD786413S1 (en) 2016-04-18 2017-05-09 Lendell Martin, Sr. Air processor
US11231207B2 (en) 2017-02-01 2022-01-25 Trane International Inc. Movable air-flow guide vane for a furnace
US10533772B2 (en) 2017-02-01 2020-01-14 Trane International Inc. Movable air-flow guide vane for a furnace
US11796255B2 (en) 2017-02-24 2023-10-24 Holtec International Air-cooled condenser with deflection limiter beams
CN107543427A (zh) * 2017-09-15 2018-01-05 双良节能系统股份有限公司 一种直接空冷凝汽器防冻控制方法
US20200318909A1 (en) * 2017-09-27 2020-10-08 Holtec International Air-cooled condenser system
US11204201B2 (en) * 2017-09-27 2021-12-21 Holtec International Air-cooled condenser system
US11604030B2 (en) * 2017-09-27 2023-03-14 Holtec International Air-cooled condenser system
EP3688396A4 (de) * 2017-09-27 2021-06-23 Holtec International Luftgekühltes kondensatorsystem
USD927664S1 (en) 2019-02-13 2021-08-10 Lendell Martin, Sr. Air handler

Also Published As

Publication number Publication date
DE1962061C3 (de) 1979-05-10
DE1962061B2 (de) 1978-09-14
ES386320A1 (es) 1973-03-16
GB1333764A (en) 1973-10-17
DE1962061A1 (de) 1972-02-17
ZA708031B (en) 1972-03-29

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