US20070231164A1 - Fuel cell compressor system - Google Patents

Fuel cell compressor system Download PDF

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Publication number
US20070231164A1
US20070231164A1 US11/567,270 US56727006A US2007231164A1 US 20070231164 A1 US20070231164 A1 US 20070231164A1 US 56727006 A US56727006 A US 56727006A US 2007231164 A1 US2007231164 A1 US 2007231164A1
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US
United States
Prior art keywords
stage
accordance
compressor
housing
outlet
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
US11/567,270
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English (en)
Inventor
William Eybergen
Martin Pryor
James Brown
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.)
Eaton Corp
Original Assignee
Eaton Corp
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 Eaton Corp filed Critical Eaton Corp
Priority to US11/567,270 priority Critical patent/US20070231164A1/en
Assigned to EATON CORPORATION reassignment EATON CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BROWN, JAMES MATTHEW, PRYOR, MARTIN DALE, EYBERGEN, WILLIAM NICHOLAS
Priority to DE112006003397T priority patent/DE112006003397T5/de
Priority to KR1020087016807A priority patent/KR20080077675A/ko
Priority to PCT/US2006/047601 priority patent/WO2007070596A2/en
Priority to JP2008545778A priority patent/JP2009520141A/ja
Publication of US20070231164A1 publication Critical patent/US20070231164A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F04D17/12—Multi-stage pumps
    • F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
    • F04D17/125—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors the casing being vertically split
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F04D17/12—Multi-stage pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04111—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants using a compressor turbine assembly
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates generally to a fuel cell compressor system, including a multi-stage fuel cell centrifugal compressor system that uses a pipe to transfer fluid from a first stage to a second stage of the compressor system.
  • fuel cells During a portion of their operation, fuel cells generally require that the fluid entering the fuel cell stack be at a high pressure with low flow.
  • a single stage centrifugal compressor is generally not able to operate under these conditions because they exist in the region beyond the surge point of the compressor.
  • the surge line In a compressor with multiple sequential stages the surge line is determined by the pressure differential across each stage which compounds to produce an overall higher compressor system pressure and shifts the surge line to a higher pressure to allow for an expanded operation range.
  • a single stage centrifugal compressor is generally not able to compress the fluid effectively to the pressure needed without reaching high rotor speeds, which can be beyond the capability of standard, mass-produced bearings.
  • fluid can be compressed to a first pressure in a first stage and then further compressed to a higher pressure in a second stage utilizing lower compressor rotor speed.
  • Conventional multi-stage compressors generally employ U-turn type internal transitions with flow diffusers to direct fluid flow from a first stage to a second stage of the compressor.
  • U-turn type transitions can result in narrow efficiency regions, which can impact total system efficiency of the compressors operating range, for example, as a result of poor off-peak compressor performance.
  • the invention provides a multi-stage fuel cell centrifugal compressor system comprising a motor, including a shaft driven by a motor, and a compressor connected to the motor.
  • the compressor includes a first stage inlet; first housing fluidly connected to the first stage inlet; and first impeller driven by the shaft for imparting fluid flow through a first stage of the system.
  • the compressor further includes a first stage outlet fluidly connected to the first housing; a second stage inlet; a second housing fluidly connected to the second stage inlet; a second impeller driven by the shaft for imparting fluid flow through a second stage; a second stage outlet fluidly connected to the second housing; and a pipe extending between the first stage outlet and the second stage inlet.
  • the pipe fluidly connects the first stage outlet to the second stage inlet, thereby directing at least a portion of fluid from the first stage to the second stage of the system.
  • a method of manufacturing a fuel cell centrifugal compressor is also provided.
  • the “pipe” may include or comprise other forms of fluid connectors, including, without limitation, a fluid conveyance tube or flexible fluid-connecting devices (e.g., hoses or other fluid conduits).
  • An improved multi-stage fuel cell compressor system can provide some advantages.
  • an improved multi-stage fuel cell compressor system can serve to minimize pressure loss over a wide operating range between subsequent stages of a system by using a pipe to direct fluid flow from a first stage to a second stage, for example, in place of a U-turn transition.
  • a compressor volute geometry that includes, for instance, a stretched circular cross-section can improve the manufacturability of the compressor volute for use in connection with a multi-stage fuel cell compressor system.
  • compressor surge can be reduced or avoided because each compressor stage can have a lower pressure ratio than a single stage compressor boosting to the same pressure ratio.
  • FIG. 1 is a perspective view of a multi-stage fuel cell compressor system in accordance with an exemplary embodiment of the present invention.
  • FIG. 2 is a top view of a multi-stage fuel cell compressor system in accordance with an exemplary embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a multi-stage fuel cell compressor system in accordance with an exemplary embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a multi-stage fuel cell compressor system in accordance with an exemplary embodiment of the present invention.
  • FIG. 5 is a perspective view of a coupling for a fuel cell compressor system in accordance with an exemplary embodiment of the present invention.
  • FIG. 6 is a partial cross-sectional view of a housing for a fuel cell compressor system showing an uncrimped crimp joint.
  • FIG. 7A is a cross-sectional view of a prior art compressor volute.
  • FIG. 7B is a cross-sectional view of a compressor volute in accordance with an exemplary embodiment of the present invention.
  • FIGS. 1-2 generally illustrate a perspective and top view, respectively, of a multi-stage fuel cell compressor system 10 in accordance with embodiments of the invention.
  • Illustrated system 10 includes a motor 12 and compressor 14 .
  • motor 12 includes a shaft 16 .
  • Motor 12 may comprise an electric motor and can be configured to drive shaft 16 .
  • a bearing 18 may be disposed within the compressor 14 in which the rotor of motor 12 may be connected or attached directly to compressor shaft 16 .
  • a plurality of bearings may be disposed within compressor 14 .
  • Bearing 18 (or a plurality of bearings) may be provided for accommodating rotational movement of shaft 16 , as shaft 16 may be a common shaft for driving two impellers for a system, such as system 10 as described further below.
  • the shaft 16 may extend in a generally axial direction between motor 12 and compressor 14 .
  • Compressor 14 is configured to compress incoming fluid to a higher pressure for use in a fuel cell.
  • the compressor 14 may be connected to motor 12 , for example, through a coupling 20 .
  • coupling 20 may include a plurality of pins 22 for coupling motor 12 to compressor 14 .
  • coupling 20 includes three angularly-spaced pins.
  • a bearing 24 or plurality of bearings may be disposed within the compressor.
  • a plurality of bearings may be disposed within the motor.
  • at least one bearing may be disposed within both motor 12 and compressor 14 .
  • Compressor 14 may include a first stage 26 , a pipe 28 , and a second stage 30 . By including multiple stages, compressor 14 may generally achieve higher pressure than a conventional single-stage compressor, even with lower rotational speeds of operation.
  • first stage 26 is configured to be able to compress incoming fluid to a first-stage pressure.
  • the first stage 26 may be located downstream of motor 12 .
  • first stage 26 may include inlet 32 , housing 34 , impeller 36 , and outlet 38 .
  • First stage inlet 32 can be configured to receive fluid into first stage 26 of compressor 14 .
  • first stage inlet 32 can be configured at a non-axial angle relative to shaft 16 .
  • first stage inlet 32 is provided substantially perpendicular to shaft 16 .
  • a fluid can enter first stage inlet 32 at a non-axial angle relative to shaft 16 and, if desired, can be routed, e.g., radially, through a filter. The fluid may then be turned axially into first stage 26 , so that the fluid flows axially into first stage 26 .
  • a first housing 34 may be configured for retaining fluid as it is transferred through the first stage 26 of system 10 .
  • First housing 34 can be fluidly connected to inlet 32 .
  • first housing 34 may comprise a first portion (e.g., first half) 40 and a second portion (e.g., second half) 42 that are connected using a plurality of fasteners 44 , which may include conventional fastening means (e.g., receiving portions and corresponding screws or bolts), disposed about an outer surface of both first portion 40 and second portion 42 .
  • a plurality of fasteners 44 may be disposed substantially around the outer perimeter of the first portion 40 and second portion 42 .
  • portions about a surface (e.g., outer surface) of the first and second portions 40 , 42 of the housing 34 may be connected by means of a secondary operation.
  • Such secondary operation may include crimping, welding, gluing (and/or using adhesive), or a combination of two or more of the foregoing.
  • portions of the outer surfaces of the first and second portions 40 , 42 may be crimped together to form at least a portion of housing 34 .
  • tabs such as those generally illustrated, i.e., tabs 43 , 59 , may be bent or folded down during a crimping operation.
  • first housing 34 may comprise a volute.
  • first impeller 36 may be configured for rotation within first housing 34 to pressurize fluid that is routed through first stage 26 of system 10 .
  • the first impeller 36 is at least partially surrounded by housing 34 .
  • First impeller 36 can be driven by shaft 16 to impart fluid flow through a first stage 26 of system 10 .
  • first impeller 36 may be coupled to shaft 16 . As impeller 36 is rotated within housing 34 , first-stage pressurized fluid can be produced.
  • First stage outlet 38 can be configured to direct first-stage pressurized fluid to second stage 30 of system 10 for further pressurization.
  • first stage outlet 38 may be configured at a non-axial angle relative to shaft 16 .
  • first stage outlet 38 may be provided substantially perpendicular to shaft 16 .
  • First stage outlet 38 is fluidly connected to housing 34 .
  • a pipe 28 is provided and configured to transfer first-stage pressurized fluid from first stage 26 to second stage 30 for further pressurization.
  • pipe 28 extends between first stage outlet 38 and second stage inlet 46 to fluidly connect first stage outlet 38 to second stage inlet 46 .
  • Pipe 28 thereby can direct at least a portion of a fluid from first stage 26 to second stage 30 of system 10 .
  • at least a portion of pipe 28 which may be an external cross-over pipe, is outside of or external to compressor 14 .
  • pipe 28 may be comprised of a polymer or plastic material.
  • pipe 28 may be comprised of polypropylene or acrylonitrile butadiene styrene (ABS).
  • Second stage 30 can be configured to further compress fluid in the system. That is, a first-stage pressurized fluid may be further pressurized to a second-stage pressurized fluid.
  • second stage 30 may include inlet 46 , housing 48 , impeller 50 , and outlet 52 .
  • a second stage inlet 46 can be configured for receiving fluid from pipe 28 into second stage 30 of compressor 14 .
  • second stage inlet 46 may be substantially aligned with shaft 16 such that fluid may flow into the second stage 30 in an axial direction
  • Second housing 48 can be configured for retaining fluid as it is transferred through second stage 30 of system 10 .
  • second housing 48 is fluidly connected to inlet 46 .
  • a nose cone 54 may be included and disposed within second housing 48 .
  • second housing 48 may comprise a first portion (e.g., a first half) 56 and a second portion (e.g., a second half) 58 that are connected using a plurality of fasteners 60 disposed about or around an outer surface of both first portion 56 and second portion 58 in an embodiment.
  • the plurality of fasteners 60 may be disposed substantially about and around the outer perimeter of the first portion 56 and second portion 58 . Referring to FIG.
  • first and second portions 56 , 58 of second housing 48 may be connected together (e.g., crimped together) about or around portions of an outer surface of the first and second portions 56 , 58 to form the housing 48 .
  • tab 59 and or tab 43 could be bent or folded down as part of a crimping operation.
  • second housing 48 may comprise a volute.
  • second impeller 50 can be configured for rotation within second housing 48 to pressurize fluid that is routed through first stage 30 of system 10 .
  • second impeller 50 is at least partially surrounded by housing 48 and is driven by shaft 16 for directing fluid flow through a second stage 30 of system 10 .
  • second impeller 50 may be coupled to shaft 16 .
  • second impeller 50 may be coupled to shaft 16 at a position on the shaft adjacent to first impeller 36 .
  • second impeller 50 may be arranged back-to-back with respect to first impeller 36 .
  • second-stage pressurized fluid can be produced.
  • a second stage outlet 52 can be provided to direct second-stage pressure fluid away from compressor 14 for further use or processing, such as directing fluid toward an inlet of a fuel cell.
  • second stage outlet 52 may be configured to be at a non-axial angle relative to shaft 16 and, if desired, may be provided substantially perpendicular to shaft 16 .
  • Second stage outlet 52 is fluidly connected to housing 48 .
  • a method of manufacturing a fuel cell centrifugal compressor is provided.
  • conventional compressor volutes commonly employ a circular cross section with a diameter that gets larger as it sweeps around a compressor outlet 62 .
  • a compressor volute 64 such as generally illustrated in FIG. 7B , may include a stretched circular cross-section, as compared to the conventional compressor volute of FIG. 7A .
  • the inventive method of manufacturing a fuel cell centrifugal compressor comprises forming a first piece of a volute, forming a second piece of a volute, and connecting the first and second pieces.
  • the forming step may comprise die-casting, forging, or stamping.
  • the volute includes a compressor outlet 62 and has an inner surface 66 extending straight from a first side 68 of compressor outlet 62 , a portion with a curve 69 , and a portion extending to second side 70 of compressor outlet 62 .
  • the transition from the portion with a curve 69 to the portion extending to second side 70 may include substantially straight segment 72 , and may further include a substantially perpendicular corner 74 (i.e., when viewed in cross section).
  • the configuration of the disclosed embodiment can, among other things, eliminate the peninsula-like cross-sectional formation generally identified in FIG. 7A , which can potentially improve flow and manufacturability.
  • the modified structure and geometry of inventive compressor volute 64 can improve the manufacturability of the inventive compressor volute 64 by allowing the inventive compressor volute 64 to generally be die-cast in two pieces without typical die-lock concerns. Since investment casting is not required to produce a compressor volute with such a modified geometry, manufacturing costs may be reduced and production rates may be increased.
  • the modified geometry can also help serve to maintain tangential entry to the volute from the impeller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Fuel Cell (AREA)
US11/567,270 2005-12-14 2006-12-06 Fuel cell compressor system Abandoned US20070231164A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/567,270 US20070231164A1 (en) 2005-12-14 2006-12-06 Fuel cell compressor system
DE112006003397T DE112006003397T5 (de) 2005-12-14 2006-12-14 Brennstoffzellenverdichtersystem
KR1020087016807A KR20080077675A (ko) 2005-12-14 2006-12-14 연료 전지 압축기 시스템
PCT/US2006/047601 WO2007070596A2 (en) 2005-12-14 2006-12-14 Fuel cell compressor system
JP2008545778A JP2009520141A (ja) 2005-12-14 2006-12-14 燃料電池用圧縮システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75022505P 2005-12-14 2005-12-14
US11/567,270 US20070231164A1 (en) 2005-12-14 2006-12-06 Fuel cell compressor system

Publications (1)

Publication Number Publication Date
US20070231164A1 true US20070231164A1 (en) 2007-10-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/567,270 Abandoned US20070231164A1 (en) 2005-12-14 2006-12-06 Fuel cell compressor system

Country Status (5)

Country Link
US (1) US20070231164A1 (ja)
JP (1) JP2009520141A (ja)
KR (1) KR20080077675A (ja)
DE (1) DE112006003397T5 (ja)
WO (1) WO2007070596A2 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011130209A1 (en) * 2010-04-12 2011-10-20 Eaton Corporation Fuel cell compressor system
GB2503240A (en) * 2012-06-20 2013-12-25 Intelligent Energy Ltd Cooling system for fuel cells
EP4332381A1 (en) * 2022-08-30 2024-03-06 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Compressor and multi stack fuel cell

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009037010A1 (de) * 2009-08-11 2011-02-17 Oerlikon Leybold Vacuum Gmbh Vakuumpumpensystem
JP6151382B2 (ja) 2014-02-13 2017-06-21 三菱重工業株式会社 多段電動遠心圧縮機
WO2015128936A1 (ja) 2014-02-25 2015-09-03 三菱重工業株式会社 多段電動遠心圧縮機及び内燃機関の過給システム

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US6585091B2 (en) * 2000-04-10 2003-07-01 Mannesmann Sachs Ag Torsional vibration damper
US20040247461A1 (en) * 2001-11-08 2004-12-09 Frank Pflueger Two stage electrically powered compressor
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US7014418B1 (en) * 2004-12-03 2006-03-21 Honeywell International, Inc. Multi-stage compressor and housing therefor
US7144226B2 (en) * 2003-03-10 2006-12-05 Thermodyn Centrifugal compressor having a flexible coupling
US7344787B2 (en) * 2003-10-29 2008-03-18 General Motors Corporation Two-stage compression for air supply of a fuel cell system

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ATE318375T1 (de) * 2001-12-10 2006-03-15 Resmed Ltd Zweiseitiges gebläse und spiralgehäuse dazu
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US2944785A (en) * 1955-05-18 1960-07-12 Thompson Ramo Wooldridge Inc Impeller for turbine engine and the like
US4155684A (en) * 1975-10-17 1979-05-22 Bbc Brown Boveri & Company Limited Two-stage exhaust-gas turbocharger
US4231702A (en) * 1979-08-24 1980-11-04 Borg-Warner Corporation Two-stage turbo compressor
USRE31259E (en) * 1979-08-24 1983-05-31 Borg-Warner Corporation Two-stage turbo compressor
US4854828A (en) * 1986-05-30 1989-08-08 Haentjens Walter D Remotely removable and replaceable motor for hazardous service pump installation
US5377361A (en) * 1994-06-03 1995-01-03 Piskula; James Toilet flange
US6193463B1 (en) * 1999-06-30 2001-02-27 Alliedsignal, Inc. Die cast compressor housing for centrifugal compressors with a true volute shape
US6585091B2 (en) * 2000-04-10 2003-07-01 Mannesmann Sachs Ag Torsional vibration damper
US20040247461A1 (en) * 2001-11-08 2004-12-09 Frank Pflueger Two stage electrically powered compressor
US7144226B2 (en) * 2003-03-10 2006-12-05 Thermodyn Centrifugal compressor having a flexible coupling
US6920754B2 (en) * 2003-05-05 2005-07-26 Honeywell International, Inc. High-pressure ratio turbocharger
US7344787B2 (en) * 2003-10-29 2008-03-18 General Motors Corporation Two-stage compression for air supply of a fuel cell system
US7013879B2 (en) * 2003-11-17 2006-03-21 Honeywell International, Inc. Dual and hybrid EGR systems for use with turbocharged engine
US7014418B1 (en) * 2004-12-03 2006-03-21 Honeywell International, Inc. Multi-stage compressor and housing therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011130209A1 (en) * 2010-04-12 2011-10-20 Eaton Corporation Fuel cell compressor system
GB2503240A (en) * 2012-06-20 2013-12-25 Intelligent Energy Ltd Cooling system for fuel cells
US9748585B2 (en) 2012-06-20 2017-08-29 Intelligent Energy Limited Cooling system for fuel cells
US10122028B2 (en) 2012-06-20 2018-11-06 Intelligent Energy Limited Cooling system for fuel cells
GB2503240B (en) * 2012-06-20 2019-05-29 Intelligent Energy Ltd Cooling system for fuel cells
EP4332381A1 (en) * 2022-08-30 2024-03-06 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Compressor and multi stack fuel cell
WO2024046682A1 (en) * 2022-08-30 2024-03-07 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Compressor and multi stack fuel cell

Also Published As

Publication number Publication date
JP2009520141A (ja) 2009-05-21
WO2007070596A2 (en) 2007-06-21
WO2007070596A3 (en) 2007-10-11
KR20080077675A (ko) 2008-08-25
DE112006003397T5 (de) 2008-10-16

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