EP2420789A1 - Luftgekühlter Wärmetauscher, der mit einem starren Paneel ausgestattet ist, das einen Windschutz bildet - Google Patents

Luftgekühlter Wärmetauscher, der mit einem starren Paneel ausgestattet ist, das einen Windschutz bildet Download PDF

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Publication number
EP2420789A1
EP2420789A1 EP10305902A EP10305902A EP2420789A1 EP 2420789 A1 EP2420789 A1 EP 2420789A1 EP 10305902 A EP10305902 A EP 10305902A EP 10305902 A EP10305902 A EP 10305902A EP 2420789 A1 EP2420789 A1 EP 2420789A1
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EP
European Patent Office
Prior art keywords
ventilation structure
air
rigid
ventilation
ground
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.)
Granted
Application number
EP10305902A
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English (en)
French (fr)
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EP2420789B1 (de
Inventor
Serge Blockerye
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Laborelec CVBA
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Laborelec CVBA
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Publication date
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Priority to EP10305902.8A priority Critical patent/EP2420789B1/de
Priority to US13/212,332 priority patent/US8776545B2/en
Publication of EP2420789A1 publication Critical patent/EP2420789A1/de
Application granted granted Critical
Publication of EP2420789B1 publication Critical patent/EP2420789B1/de
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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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices

Definitions

  • the present invention relates to the general field of heat exchangers cooled by air.
  • the field of application of the invention is in particular, but not exclusively, that of air-cooled condensers of thermal power plants.
  • Air-cooled condensers also known as air-cooled condensers or ACCs
  • CCAs are advantageous alternatives to water-cooled condensers.
  • ACCs do not release water vapor into the atmosphere, are of limited height, and do not require proximity to a source of cold water (river or canal). ).
  • an ACC is composed of a plurality of ventilation modules arranged in several parallel rows, adjacent to each other and arranged in the same horizontal plane to form a ventilation structure which is spaced from the ground.
  • Each fan module has a fan for drawing air from below the ventilation structure and blowing it vertically through heat exchange tubes in which the steam from the low-pressure turbine of the thermal power station.
  • the efficiency of a thermal power station depends on the efficiency of the CCA heat transfer.
  • ACCs are very sensitive to external weather conditions that can significantly degrade their performance in terms of heat transfer and vacuum obtained within the condenser (also called backpressure turbine). This is the case for example when the surrounding temperature is high, when the winds intensify or when a recirculation of hot air is created.
  • some obstacles such as surrounding buildings, steam pipes, tanks, etc. can influence the circulation of air at the entrance of the ACC and cause hot air recirculation.
  • hot air coming out of the ACC can be redirected to the entrance of the ACC and thus sucked back by the fans.
  • windbreaks consists of a cross-shaped panel which is installed under the ventilation structure to divide the fan intake space into several partitioned areas with respect to one another.
  • This type of windshield that extends vertically from the ground has the effect that the wind flowing under the ventilation structure tends to be deflected by the windshield and directed vertically to the fans.
  • the main object of the present invention is therefore to overcome such disadvantages by proposing an air-cooled heat exchanger whose efficiency is only slightly affected by the surrounding weather conditions, and in particular by the presence of winds.
  • an air-cooled heat exchanger comprising a plurality of ventilation modules arranged in several parallel rows, adjacent to one another and arranged in the same horizontal plane to form a ventilation structure which is spaced from the floor of the floor. so as to allow an air flow under the ventilation structure, each ventilation module comprising a fan directed to suck air present below the ventilation structure and blow it vertically through heat exchange elements, characterized in that it further comprises at least one rigid panel forming a wind barrier which extends vertically from a lateral edge of the ventilation structure to the ground over a height of between 5 and 50% of the distance separating the ventilation structure from the ground.
  • the presence of the rigid panel according to the invention also improves the performance of the heat exchanger cooled by air even when the wind is zero. Potential recirculations of air are also reduced. Indeed, the presence of this rigid panel creates an additional obstacle to a possible aspiration of the hot air leaving the exchanger, which limits the degradation of performance due to the presence of an air made warmer at the entrance of this exchanger.
  • the exchanger is devoid of wind deflection member between the ground and a lower end of the rigid panel forming windbreak.
  • the rigid windshield panel is disposed on the side of the ventilation structure which is the most exposed to the wind.
  • the ventilation structure may have a substantially rectangular shape, the rigid windshield panel extending on one side of said ventilation structure.
  • the exchanger may comprise rigid windshield panels extending over two, three or four sides of the ventilation structure.
  • the exchanger further comprises at least one additional rigid panel extending vertically from a side edge of the ventilation structure upwardly.
  • the exchanger can constitute an air-cooled condenser of a thermal power station.
  • the invention is applicable to various types of air-cooled heat exchangers, and in particular to air-cooled condensers of thermal power plants such as that illustrated in FIGS. figures 1 and 2 .
  • the air-cooled condenser 1 comprises in particular a ventilation structure 100 and a structure 200 carrying heat exchange elements disposed above the ventilation structure.
  • the ventilation structure 100 which has a substantially rectangular shape is carried by vertical feet 102 so as to be raised relative to the ground S (a height H up to 60m).
  • the space E formed between the floor S and the underside of the ventilation structure allows the air to circulate freely.
  • the ventilation structure 100 consists of several rows of ventilation modules 104 which are arranged in parallel and adjacent to each other, each ventilation module 104 comprising a fan 106 with a vertical axis of rotation 108.
  • the rows of these ventilation modules 104 are arranged in the same horizontal plane.
  • the structure 200 carrying heat exchange elements is known per se and therefore will not be described in detail.
  • this structure 200 can support a plurality of bundles of tubes 202 disposed above the ventilation modules 104 and each containing a plurality of finned tubes 204 in which the steam to be condensed.
  • the latter is for example conveyed from a low-pressure turbine 206 of the thermal power plant via a main conduit 208.
  • the operation of such an air-cooled condenser is as follows.
  • the steam to be condensed from the low-pressure turbine 206 of the thermal power plant is conveyed by the main duct 208 and flows transversely in the finned tubes 204 positioned in the bundles of tubes 202.
  • the fans 106 of the ventilation modules are directed from so as to suck the air flowing in the space E and to blow it vertically on the tube bundles enclosing the finned tubes 204 in order to achieve the heat exchange and thus condense the steam flowing in these tubes.
  • the water resulting from the condensation of the steam is evacuated via another circuit (not shown in the figures) for recycling.
  • the air cooled condenser 1 further comprises a rigid windshield panel 300 which extends vertically from a lateral edge of the ventilation structure towards the ground over a height h of between 5 and 50% of the distance separating the ventilation structure 100 from the ground S (and which corresponds to the height H defined above).
  • Such a rigid panel 300 has several features. It is especially made of a material that makes it rigid, as opposed to a flexible panel as obtained from fabric for example.
  • this rigid panel may be made of various materials (metal, synthetic or other). The surface of the panel may be smooth or provided with reliefs.
  • the material used to make the rigid panel may have any elasticity (for example, a very thin metal sheet which is deformed under the effect of the wind and which returns to its original shape in the absence of wind can be used) .
  • the rigid panel 300 extends over a whole lateral edge of the ventilation structure 100. If the ventilation structure has a rectangle shape as illustrated on the figures 1 and 2 , the rigid panel extends on one of the sides of the rectangle.
  • this side is chosen to correspond to the side of the ventilation structure 100 which is normally the most exposed to the wind (compared to the other sides).
  • the air-cooled condenser 1 comprises several rigid panels 300 which extend over the entire periphery of the ventilation structure, that is to say that each side of the ventilation structure comprises such a rigid panel.
  • each rigid panel 300 extends vertically from the underside of the ventilation structure and down to the ground S.
  • the height h on which each panel extends vertically is between 5 and 50% - and preferably between 25 and 35% of the height H.
  • the air-cooled condenser according to the invention is preferably devoid of any panel or other member of wind deflection between the lower limit of the rigid panels 300 and the ground S.
  • the air-cooled condenser according to the invention is devoid of panel or other wind deflection member that can be disposed between its side edges.
  • FIGS. 3A and 3B show the effect of the presence of a rigid panel 300 on the air flow of the fans 106 of a ventilation structure of an air-cooled condenser, this ventilation structure being for example composed of thirty-six fans.
  • a rigid panel 300 having the features of the invention is mounted on the side of the ventilation structure which is directly exposed to the wind. It is found that the presence of such a rigid panel can significantly reduce the degradation of the air flow sucked by the fans, and this from the first row (that is to say, that is directly behind the rigid panel) . In addition, the wind speed affects the performance of the fans much less thanks to the presence of the rigid panel according to the invention.
  • the air-cooled condenser 1 'further comprises at least one additional rigid panel 400 which extends vertically from a side edge of the ventilation structure upward (i.e. opposite to the rigid panel 300).
  • this additional panel 400 extends over the entire height on which extend vertically the bundles of tubes 202 disposed above the ventilation modules 104 and each containing the finned tubes in which the steam to be condensed.
  • the rigid panel 300 it is advantageous to have such additional panels on the entire periphery of the ventilation structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Other Air-Conditioning Systems (AREA)
EP10305902.8A 2010-08-19 2010-08-19 Luftgekühlter wärmetauscher, der mit einem starren paneel ausgestattet ist, das einen windschutz bildet Not-in-force EP2420789B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10305902.8A EP2420789B1 (de) 2010-08-19 2010-08-19 Luftgekühlter wärmetauscher, der mit einem starren paneel ausgestattet ist, das einen windschutz bildet
US13/212,332 US8776545B2 (en) 2010-08-19 2011-08-18 Heat exchanger cooled by air fitted with a rigid panel forming a windscreen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10305902.8A EP2420789B1 (de) 2010-08-19 2010-08-19 Luftgekühlter wärmetauscher, der mit einem starren paneel ausgestattet ist, das einen windschutz bildet

Publications (2)

Publication Number Publication Date
EP2420789A1 true EP2420789A1 (de) 2012-02-22
EP2420789B1 EP2420789B1 (de) 2018-02-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10305902.8A Not-in-force EP2420789B1 (de) 2010-08-19 2010-08-19 Luftgekühlter wärmetauscher, der mit einem starren paneel ausgestattet ist, das einen windschutz bildet

Country Status (2)

Country Link
US (1) US8776545B2 (de)
EP (1) EP2420789B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329955A (zh) * 2014-11-17 2015-02-04 国核（北京）科学技术研究院有限公司 空气冷凝器系统

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105899906B (zh) 2013-08-30 2018-10-16 先进分析方案有限公司 轴流式风机进口风转叶片组件
CN104764344B (zh) * 2015-04-15 2016-10-05 华北电力大学（保定） 一种发电厂的集中供风空冷岛
CN109196298B (zh) * 2016-05-25 2020-11-27 Spg空气冷却比利时公司 空气冷凝设备及方法
CN107388845B (zh) * 2017-06-30 2019-05-21 中科诺维(北京)科技有限公司 空冷岛防风设备
US11067338B2 (en) * 2017-09-01 2021-07-20 The Babcock & Wilcox Company Air cooled condenser (ACC) wind mitigation system
CN110749205A (zh) * 2019-10-30 2020-02-04 中国能源建设集团山西省电力勘测设计院有限公司 可改善直接空冷凝汽器传热效果的通风道结构及构建方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE942636C (de) * 1954-05-08 1956-05-03 Gea Luftkuehler Ges M B H Verfahren und Vorrichtung zur Ermittlung von Lufteinbruechen bei unter atmosphaerischem Unterdruck stehenden Luftkondensationsanlagen
GB903397A (en) * 1958-12-29 1962-08-15 Happel Gmbh Apparatus for cooling liquids and gases
US3939906A (en) * 1973-12-28 1976-02-24 The Lummus Company Air cooled exchanger
DE202004012838U1 (de) * 2004-08-16 2004-10-21 Löffler, Bernd Seitenwandprofil mit Lamellenabstützung für Lamellenrohrwärmetauscher
US20050006050A1 (en) * 2003-07-10 2005-01-13 Balcke-Durr Gmbh Method and device for directing flow in air-cooled condenser systems
US20080196435A1 (en) * 2005-05-23 2008-08-21 Heinrich Schulze Condensation Plant
US20090165993A1 (en) * 2007-12-28 2009-07-02 Spx Cooling Technologies, Inc. Air guide for air cooled condenser

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795682B1 (fr) * 1999-06-30 2001-12-07 Valeo Climatisation Module de ventilation monobloc optimise en encombrement et accessibilite
EP1798491B1 (de) * 2005-12-19 2008-07-30 AERMEC S.p.A. Modulare Klimaanlage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE942636C (de) * 1954-05-08 1956-05-03 Gea Luftkuehler Ges M B H Verfahren und Vorrichtung zur Ermittlung von Lufteinbruechen bei unter atmosphaerischem Unterdruck stehenden Luftkondensationsanlagen
GB903397A (en) * 1958-12-29 1962-08-15 Happel Gmbh Apparatus for cooling liquids and gases
US3939906A (en) * 1973-12-28 1976-02-24 The Lummus Company Air cooled exchanger
US20050006050A1 (en) * 2003-07-10 2005-01-13 Balcke-Durr Gmbh Method and device for directing flow in air-cooled condenser systems
DE202004012838U1 (de) * 2004-08-16 2004-10-21 Löffler, Bernd Seitenwandprofil mit Lamellenabstützung für Lamellenrohrwärmetauscher
US20080196435A1 (en) * 2005-05-23 2008-08-21 Heinrich Schulze Condensation Plant
US20090165993A1 (en) * 2007-12-28 2009-07-02 Spx Cooling Technologies, Inc. Air guide for air cooled condenser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329955A (zh) * 2014-11-17 2015-02-04 国核（北京）科学技术研究院有限公司 空气冷凝器系统

Also Published As

Publication number Publication date
US20120043061A1 (en) 2012-02-23
US8776545B2 (en) 2014-07-15
EP2420789B1 (de) 2018-02-28

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