US20150075166A1 - Sound damper for evaporation channels in steam power plants with air condensers - Google Patents

Sound damper for evaporation channels in steam power plants with air condensers Download PDF

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Publication number
US20150075166A1
US20150075166A1 US14/397,624 US201314397624A US2015075166A1 US 20150075166 A1 US20150075166 A1 US 20150075166A1 US 201314397624 A US201314397624 A US 201314397624A US 2015075166 A1 US2015075166 A1 US 2015075166A1
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US
United States
Prior art keywords
silencer
steam
steam turbine
waste
duct
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.)
Abandoned
Application number
US14/397,624
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English (en)
Inventor
Stephan Minuth
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MINUTH, STEPHAN
Publication of US20150075166A1 publication Critical patent/US20150075166A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/30—Exhaust heads, chambers, or the like
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • 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
    • F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid 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
    • F28B9/02—Auxiliary systems, arrangements, or devices for feeding steam or vapour to condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/96—Preventing, counteracting or reducing vibration or noise
    • 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
    • F28F2265/28—Safety or protection arrangements; Arrangements for preventing malfunction for preventing noise

Definitions

  • the following relates to a steam turbine unit, in particular for a steam power plant, having a steam turbine and a condenser which is connected to the steam turbine via a waste steam duct.
  • Thermal power plants otherwise known as thermal power plants, are extensively known, for example from http://de.wikipedia.org/wiki/Dampfkraftmaschine (retrieved Apr. 20, 2012).
  • a steam power plant is a type of power plant for generating electricity from fossil fuels, in which thermal energy from steam is converted into kinetic energy in a steam turbine and is further converted into electrical energy in a generator.
  • the steam required for operating the steam turbine is first generated in a boiler from (feed) water, which generally has been previously purified and prepared. Further heating the steam in a superheater increases the temperature and specific volume of the steam.
  • the steam flows via pipes into the steam turbine, where it gives off part of its previously absorbed energy as kinetic energy to the steam turbine.
  • a generator is coupled to the steam turbine and converts mechanical power to electrical power.
  • the expanded and cooled steam flows out of the steam turbine via a waste steam line or a waste steam duct into the condenser, where it condenses by transfer of heat to the surroundings and collects as liquid water.
  • the water Via condensate pumps and through preheaters, the water is held in a feed water container and is then once again supplied to the boiler by means of a feed pump, thus closing a circuit.
  • a COGAS power plant of this type is a power plant in which the principles of a gas turbine power plant and of the steam power plant are combined.
  • a gas turbine serves here as a heat source for a downstream waste heat boiler which in turn serves as a steam generator for the steam turbine.
  • turbomachines such as the steam turbines, produce relatively high pressure emissions and/or sound emissions which, in addition to vibrations and structure-relevant malfunctions, can also lead to (noise) disturbance in the surroundings of the turbomachine.
  • dominant pressure/sound sources in a steam turbine are typically generated at a rotor disk, caused by the high speed of the fluids flowing through these regions and by an interaction between rotor components and stator components.
  • an elevated sound pressure level in particular at low frequency ranges, for example at frequencies ⁇ 500 Hz, was measured in the waste steam duct connecting the steam turbine to the condenser.
  • This low-frequency sound is transmitted further, through or via the waste steam duct, into the condenser.
  • Low-frequency sound as can be observed in the waste steam ducts, also has the disadvantage that it cannot be effectively blocked or damped by means of insulation, for example on the waste steam duct.
  • Silencers i.e. generally devices for reducing sound emissions, are generally known. There are several basic designs for silencers, which reduce the generated sound power on the basis of various mechanisms. In general, absorption silencers or interference/reflection silencers—hereinafter designated just as reflection silencers—are used.
  • Such a reflection silencer contains multiple, for example four, chambers in order to make use of the principle of acoustic reflection.
  • the acoustic reflections are generated in the reflection silencer by baffles, cross-sectional widenings and narrowings.
  • the reflection silencer principally the low frequencies are damped by the acoustic reflection.
  • An absorption silencer contains a porous material, in general rockwool, glass wool or glass fiber, which partially absorbs sound energy, that is to say converts it into heat.
  • a low-frequency silencer embodied as an interference silencer or low-frequency silencer is known from HOBATHERM®, G: ⁇ VERKAUF ⁇ Technischer Ordner ⁇ Technischer Ordner 2008.doc, 3.4 Tiefton-Schalldämpfer.
  • Embodiments of the invention are based on the aspect of creating a steam turbine unit having at least one steam turbine and a condenser which is connected to the steam turbine via a waste steam duct, which steam turbine unit overcomes the described drawbacks of the prior art.
  • the embodiments of the invention are based on the aspect of creating such a steam turbine unit which can be operated in a manner which is safe for the components and with low sound emissions, and which can be produced cost-effectively and easily.
  • the steam turbine unit corresponding to embodiments of the invention have at least one steam turbine and a (waste steam) condenser which is connected to the steam turbine via a waste steam duct or waste steam line, both referred to in the following simply as waste steam duct.
  • a silencer is coupled acoustically to the waste steam duct.
  • Coupled acoustically is to be understood as meaning that sound or sound waves occurring in the waste steam duct can enter the silencer for sound damping or sound attenuation therein.
  • waste steam supplied from the steam turbine to the condenser via the waste steam duct is, according to embodiments of the invention, guided in or through the silencer arranged in the waste steam duct, in which sound pressure levels occurring in the waste steam are damped or attenuated.
  • the silencer in a simple or constructively simple and effective manner, damping of sound occurring in the waste steam duct.
  • the high noise load or noise pollution in the surroundings of the steam turbine unit can thereby be reduced, and sound protection limit levels can be observed.
  • vibrations and structure-relevant malfunctions—and consequently damage to components—which are caused by pressure emissions and/or sound emissions, can be reduced by means of embodiments of the invention.
  • the silencer is a low-frequency silencer, in particular configured as an interference silencer or reflection silencer.
  • Such a low-frequency silencer embodied as reflection silencer, allows frequencies below 500 Hz to be damped in a targeted manner, simply and effectively.
  • the reflection silencer has one or more reflection chambers which are each configured for filtering a very specific range or band of frequencies. It is thus possible to damp broad frequency ranges.
  • a reflection tube silencer having multiple series-connected outer resonance chambers can be provided, which resonance chambers function for example as lambda/2 resonators, lambda/4 resonators or Helmholtz resonators.
  • the reflection chambers may be embodied with or without any absorption material, such as stainless steel or mineral wool.
  • the reflection chambers may furthermore be embodied as a welded construction.
  • the reflection chambers may also each be equipped with a liquid discharge or condensate discharge. Furthermore, cleaning openings may also be provided in the reflection chambers.
  • a reflection chamber of such a reflection silencer is formed by an inner sheet metal ring which is provided with longitudinal holes or slits and which is enclosed concentrically by a further ring.
  • Multiple double rings of this type may be arranged in series in the waste steam duct—either immediately adjacent to one another or at a distance from one another—or may be coupled acoustically therewith.
  • a suitable silencer for example a reflection silencer for low-frequency sound or an absorption silencer for higher-frequency sound, or a suitable or accordingly adapted configuration of the silencer, for example reflection chambers configured to certain frequencies or frequency bands in the case of a reflection silencer, may then be used.
  • the silencer is configured to damp low frequencies, for example below 500 Hz, in particular between 40 Hz and 500 Hz. Very particularly preferred is a configuration of the silencer to damp frequencies between 60 Hz and 250 Hz.
  • a particularly simple constructive embodiment is achieved by the silencer being arranged in the waste steam duct such that waste steam from the steam turbine can flow through it.
  • a further refinement provides that the silencer has a drainage device. It is thereby possible to avoid liquid or condensed waste steam, simply condensate for short, which is precipitated from the waste steam, collecting in the silencer and the latter thus being caused to vibrate.
  • reflection cavities are provided with drainage ducts or outflow bores.
  • hotboxes are often in each case arranged in steam turbine units or in their waste steam ducts. By virtue of such a hotbox, bypass steam can be fed into the waste steam duct.
  • One preferred refinement then provides in this case that the silencer is coupled acoustically to such a hotbox.
  • a further preferred refinement provides that the silencer is coupled acoustically to a further silencer, whereby both silencers are then coupled acoustically to the waste steam duct. It is hereby possible, in a manner which is very simple and efficient (in terms of construction), to damp more frequencies and/or larger frequency bands of the sound occurring in the waste steam duct.
  • the silencer may here be an interference silencer—for damping the low-frequency sound—and the further silencer, coupled acoustically to the interference silencer, may be an absorption silencer—for damping the higher-frequency sound.
  • the steam turbine has multiple sections or turbine sections.
  • the steam turbine may be provided with a low-pressure, an intermediate-pressure and/or a high-pressure section.
  • the turbine sections may be of single- or multiple-flow, in particular two-flow, design.
  • the silencer may be arranged within a machine casing which encloses the steam turbine at least partially or even entirely. Alternatively, it can also be provided that the silencer is arranged outside such a machine casing.
  • One preferred refinement provides that the steam turbine installation according to embodiments of the invention are arranged in a steam power plant or in a water/steam circuit created there.
  • the steam power plant may be a coal-fired power plant, an oil-fired power plant or a gas-and-steam combined-cycle power plant.
  • FIG. 1 shows a water/steam circuit having a steam turbine unit, consisting of a steam turbine and a condenser connected to the steam turbine via waste steam ducts, in a steam power plant according to one exemplary embodiment of the invention
  • FIG. 2 shows a detailed representation of a low-frequency silencer for a waste steam line or a waste steam duct in the steam turbine unit or in the steam power plant according to the exemplary embodiment of the invention
  • FIG. 3 shows a waste steam line, equipped with a low-frequency silencer, in a steam turbine unit or in a steam power plant according to the further exemplary embodiment of the invention.
  • low-frequency silencer 2 for a waste steam duct 24 in a steam power plant 100 with an (air/waste steam) condenser 11 low-frequency silencer 2 for a waste steam duct 24 in a steam power plant 100 with an (air/waste steam) condenser 11 .
  • FIG. 1 shows a water/steam circuit 18 of a coal-fired steam power plant 100 with a steam turbine unit 1 consisting of a steam turbine 22 and a condenser 11 connected to the steam turbine 22 via waste steam ducts 24 .
  • this coal-fired power plant 100 in the following simply steam power plant 100 for short, according to a conventional coal firing, lignite or hard coal is ground and dried in a coal mill. This coal is then blown into a combustion chamber 16 for a dust firing facility, where it is completely burnt 17 .
  • Heat thus released is taken up by a water-tube boiler, steam generator 20 for short, and converts fed-in (feed) water 5 into steam/high-pressure steam 6 .
  • the high-pressure steam 6 generated in the steam generator 20 enters the high-pressure section 7 of the steam turbine 22 , where it performs mechanical work as it expands and cools.
  • the high-pressure steam 6 flows via a crossover line 23 into the two-flow low-pressure section 8 of the steam turbine 22 , where further mechanical work is performed as the steam expands and cools to waste steam pressure.
  • the generator 9 coupled to the steam turbine 22 then converts the mechanical power into electrical power, which is supplied to a grid 15 in the form of electrical current.
  • the waste steam 25 from the steam turbine 22 or from the two-flow low-pressure (turbine) section 8 of the steam turbine 22 is supplied, via the two waste steam ducts 24 , to the condenser 11 where the waste steam 25 condenses with the aid of the cooling water 13 delivered through the cooling water circuit 10 by a cooling water pump 12 .
  • the resulting condensate or feed water 5 is supplied back to the steam generator 20 by the condensate pump or feed water pump 4 , with heating in the preheater 14 .
  • these two low-frequency silencers 2 configured as reflection tube silencers—reflection silencers 2 for short—which are particularly suited to damping low-frequency sound emissions, are arranged in the two waste steam ducts 24 through which the waste steam 25 , flowing out of the two-flow low-pressure turbine section 8 , can flow.
  • FIG. 2 shows a detailed representation of the low-frequency silencer 2 which is coupled acoustically to the two waste steam ducts 24 , or which is arranged in the two waste steam ducts 24 and through which the waste steam 25 flows.
  • the low-frequency silencer 2 is designed as a reflection silencer 2 having three reflection chambers 26 , 27 and 28 which are arranged in series in the flow direction 36 of the waste steam 25 and which function as lambda/2 resonators.
  • the reflection chambers 26 , 27 , 28 which are free from absorption material or fibers, are formed by a smooth stainless steel inner tube 29 through which the waste steam 25 flows and which is enclosed concentrically by a jacket tube 30 , also made of stainless steel.
  • the interspace 31 thus formed between the two tubes 29 and 30 is divided or delimited by means of two separating disks 33 , 34 and by means of two cover disks 32 , 35 , whereby the three reflection chambers 26 , 27 , 28 are formed, each having a different size or volume.
  • Each of the reflection chambers 26 , 27 and 28 filters—on account of its different size or volume and its differently configured inlet opening 37 —a certain frequency range, which has been determined by means of frequency analysis of the noises in the waste steam duct 24 and according to which the respective reflection chamber 26 , 27 or 28 has then been accordingly dimensioned or adapted.
  • the reflection chambers 26 , 27 and 28 represented are for example in this case configured so as to damp frequencies or frequency bands between 40 Hz and 500 Hz.
  • the inlet openings or slits 37 are distributed over the circumference of the inner tube 29 and are of different configurations, and which allow the sound to enter from the inner tube 29 —through which the waste steam flows—into the respective reflection chamber 26 , 27 or 28 .
  • the construction of the reflection silencer 2 is effected by welding.
  • the reflection chambers 26 , 27 and 28 may (not shown) be provided with cleaning openings.
  • the reflection chambers 26 , 27 and 28 each have a drainage opening 39 to a liquid discharge, in order that no waste steam liquid or condensate, precipitated from the waste steam 25 , collects there, i.e. in the reflection chambers 26 , 27 and 28 , and is caused to vibrate.
  • FIG. 3 shows a further configuration of a waste steam duct 24 equipped with the low-frequency silencer 2 , as can be provided in the steam turbine unit 1 .
  • a hotbox 40 which has multiple in-lines 43 (two in-lines 43 shown here), inter alia for bypass steam.
  • the low-frequency silencer 2 is arranged downstream (as seen in the flow direction) of this hotbox 40 , such that the waste steam 25 leaving or flowing out of the hotbox 40 flows through the low-frequency silencer 2 and onward to the condenser 11 .
  • the low-frequency silencer 2 has the three reflection chambers 26 , 27 and 28 which, however, have been altered in terms of their volume by further additional separating disks 41 and 42 —in this case adapted to (other) low frequencies to be damped.
  • the reflection chambers 26 , 27 and 28 are each provided with a drainage opening 39 .
  • waste steam line 25 is outside a machine casing (not shown) which incorporates the steam turbine 22 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
US14/397,624 2012-04-30 2013-04-18 Sound damper for evaporation channels in steam power plants with air condensers Abandoned US20150075166A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012207176.8 2012-04-30
DE102012207176A DE102012207176A1 (de) 2012-04-30 2012-04-30 Schalldämpfer für Abdampfkanäle bei Dampfkraftwerken mit Luftkondensatoren
PCT/EP2013/058087 WO2013164197A2 (fr) 2012-04-30 2013-04-18 Silencieux pour conduits d'évaporation de centrales thermiques à vapeur pourvue de condenseurs d'air

Publications (1)

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US20150075166A1 true US20150075166A1 (en) 2015-03-19

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US14/397,624 Abandoned US20150075166A1 (en) 2012-04-30 2013-04-18 Sound damper for evaporation channels in steam power plants with air condensers

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US (1) US20150075166A1 (fr)
JP (1) JP2015521247A (fr)
DE (1) DE102012207176A1 (fr)
WO (1) WO2013164197A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160040942A1 (en) * 2014-08-08 2016-02-11 Halla Visteon Climate Control Corp. Heat exchanger with integrated noise suppression
US9951657B2 (en) 2013-11-08 2018-04-24 Siemens Aktiengesellschaft Module for condensing expelled vapors and for cooling turbine effluent

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6302238B2 (ja) * 2013-12-20 2018-03-28 三菱重工業株式会社 排気装置及びガスタービン
JP2015140686A (ja) * 2014-01-27 2015-08-03 株式会社東芝 蒸気タービン配管

Citations (8)

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US3984219A (en) * 1975-12-31 1976-10-05 Huang Ming Dao Engine exhaust purifier-muffler
US4105089A (en) * 1975-11-24 1978-08-08 Judd Frederick V H Flow distributor for gas turbine silencers
US4180141A (en) * 1975-11-24 1979-12-25 Judd Frederick V H Distributor for gas turbine silencers
US4314621A (en) * 1979-03-07 1982-02-09 Caterpillar Tractor Co. Fluidborne noise attenuator
US6550574B2 (en) * 2000-12-21 2003-04-22 Dresser-Rand Company Acoustic liner and a fluid pressurizing device and method utilizing same
US20030145586A1 (en) * 2002-02-06 2003-08-07 Shields Phillip Kinyon Wave/blowhole electrical power generating plant
US7017706B2 (en) * 2001-12-21 2006-03-28 Honeywell International, Inc. Turbine noise absorber
US20120023940A1 (en) * 2010-07-30 2012-02-02 TAS Energy, Inc. High performance orc power plant air cooled condenser system

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DE2029830C3 (de) * 1970-06-18 1974-04-11 Steag Ag, 4300 Essen Verfahren zum Anwärmen der Frischdampfleitung und der Zwischenüberhitzerleitung von Dampfturbinenanlagen
JPH0724573Y2 (ja) * 1989-03-16 1995-06-05 三菱重工業株式会社 吸音スプリッタ
EP0764762A1 (fr) * 1994-04-14 1997-03-26 Balcke-Dürr GmbH Dispositif de silencieux
EP1191192A1 (fr) * 2000-09-26 2002-03-27 Siemens Aktiengesellschaft Procédé et dispositif pour préchauffer et enlever l'eau de conduits de vapeur pour étages de turbines
US7055324B2 (en) * 2003-03-12 2006-06-06 Fisher Controls International Llc Noise abatement device and method for air-cooled condensing systems
US8061961B2 (en) * 2009-01-23 2011-11-22 Dresser-Rand Company Fluid expansion device and method with noise attenuation
US8069666B1 (en) * 2010-02-25 2011-12-06 Maxim Silencers, Inc. System for generating shaft horsepower using waste heat

Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
US4105089A (en) * 1975-11-24 1978-08-08 Judd Frederick V H Flow distributor for gas turbine silencers
US4180141A (en) * 1975-11-24 1979-12-25 Judd Frederick V H Distributor for gas turbine silencers
US3984219A (en) * 1975-12-31 1976-10-05 Huang Ming Dao Engine exhaust purifier-muffler
US4314621A (en) * 1979-03-07 1982-02-09 Caterpillar Tractor Co. Fluidborne noise attenuator
US6550574B2 (en) * 2000-12-21 2003-04-22 Dresser-Rand Company Acoustic liner and a fluid pressurizing device and method utilizing same
US7017706B2 (en) * 2001-12-21 2006-03-28 Honeywell International, Inc. Turbine noise absorber
US20030145586A1 (en) * 2002-02-06 2003-08-07 Shields Phillip Kinyon Wave/blowhole electrical power generating plant
US20120023940A1 (en) * 2010-07-30 2012-02-02 TAS Energy, Inc. High performance orc power plant air cooled condenser system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9951657B2 (en) 2013-11-08 2018-04-24 Siemens Aktiengesellschaft Module for condensing expelled vapors and for cooling turbine effluent
US20160040942A1 (en) * 2014-08-08 2016-02-11 Halla Visteon Climate Control Corp. Heat exchanger with integrated noise suppression
US11092388B2 (en) 2014-08-08 2021-08-17 Hanon Systems Heat exchanger with integrated noise suppression

Also Published As

Publication number Publication date
DE102012207176A1 (de) 2013-10-31
JP2015521247A (ja) 2015-07-27
WO2013164197A3 (fr) 2014-06-19
WO2013164197A2 (fr) 2013-11-07

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AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MINUTH, STEPHAN;REEL/FRAME:034054/0222

Effective date: 20141016

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION