US20070237654A1 - Air supply system - Google Patents

Air supply system Download PDF

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Publication number
US20070237654A1
US20070237654A1 US11/783,605 US78360507A US2007237654A1 US 20070237654 A1 US20070237654 A1 US 20070237654A1 US 78360507 A US78360507 A US 78360507A US 2007237654 A1 US2007237654 A1 US 2007237654A1
Authority
US
United States
Prior art keywords
compressor
flow path
gas
supply system
air supply
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
US11/783,605
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English (en)
Inventor
Kuri Kasuya
Yoshihiro Sugawara
Tetsuya Tajima
Koji Matsumoto
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Assigned to HONDA MOTOR CO., LTD. reassignment HONDA MOTOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATSUMOTO, KOJI, TAJIMA, TETSUYA, SUGAWARA, YOSHIHIRO, KASUYA, KURI
Publication of US20070237654A1 publication Critical patent/US20070237654A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • 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
    • 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
    • H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
    • H01M8/04231—Purging of the reactants
    • 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 present invention relates to an air supply system.
  • a fuel cell system includes, for example, a fuel cell for generating power by a chemical reaction of the reaction gas, a reaction gas supply apparatus for supplying reaction gas to the fuel cell via a reaction gas flow path, and a control apparatus for controlling the reaction gas supply apparatus.
  • a fuel cell has a stacked structure in which, for example, a few dozen or several hundred cells are layered.
  • each cell is composed of a pair of separators sandwiching a membrane electrode assembly (MEA).
  • MEA membrane electrode assembly
  • the membrane electrode assembly is composed of two electrodes, an anode (positive electrode) and a cathode (negative electrode), and a solid polymer electrolyte membrane sandwiched by these electrodes.
  • the above-described reaction gas supply apparatus includes, for example, a compressor which draws in air from the outside and discharges the drawn in air at high pressure.
  • This compressor includes a discharge outlet from which the compressed air at high pressure rapidly reduces pressure and causes turbulence. Such turbulence or pulsation of air causes a lot of noise.
  • the discharge outlet of the compressor frequently includes a silencer (see Japanese Unexamined Patent Application Publication No. 8-69286).
  • an air supply system e.g., air supply system 21 in an embodiment
  • a compressor which draws in gas to discharge the gas drawn in at an increased pressure e.g., compressor 41 in an embodiment
  • an intake flow path in which the gas drawn in by the compressor flows e.g., intake flow path 43 in an embodiment
  • a discharge flow path through which the gas discharged from the compressor flows e.g., discharge flow path 44 in an embodiment
  • a first rectification apparatus e.g., rectification apparatus 45 A in an embodiment
  • the gas may be, for example, air containing oxygen.
  • the discharge flow path includes the rectification apparatus for rectifying gas.
  • the rectification apparatus for rectifying gas.
  • the noise of the compressor can be reduced, along with a reduction in space and with a lower cost.
  • the present invention even when gas is discharged causing turbulence associated with a shock wave, the turbulence can be rectified and a rapid change in the gas flow can be suppressed to reduce noise in a wide frequency band when gas is discharged.
  • the present invention only requires a rectification apparatus to be provided at a discharge outlet of a compressor.
  • the noise of the compressor can be reduced, along with reduced space and cost.
  • FIG. 1 illustrates a block diagram of a fuel cell system using an air supply system
  • FIG. 2 illustrates a block diagram of the schematic structure of the air supply system
  • FIG. 3 illustrates a partial enlarged view of an intake flow path and a discharge flow path of the air supply system
  • FIG. 4 shows the first illustrative embodiment and a comparative example of the air supply system
  • FIG. 5 illustrates a block diagram of the schematic structure of an air supply system
  • FIG. 6 shows a relation between the volume of air discharged from the rectification apparatus and the pressure drop by the rectification apparatus
  • FIG. 7 illustrates the second illustrative embodiment and a comparative example of the air supply system
  • FIG. 8 illustrates the third illustrative embodiment and a comparative example of the air supply system.
  • FIG. 1 illustrates a block diagram of a fuel cell system 1 using an air supply system 21 .
  • the fuel cell system 1 has a fuel cell 10 , a supply apparatus 20 which supplies hydrogen gas and air to the fuel cell 10 , and a control apparatus 30 which controls the fuel cell 10 and the supply apparatus 20 .
  • the supply apparatus 20 is configured to include an air supply system 21 which supplies air to the cathode of the fuel cell 10 , and a hydrogen tank 22 and an ejector 28 which supply hydrogen gas to the anode.
  • the air supply system 21 is connected to the cathode of the fuel cell 10 via an air supply path 23 .
  • the cathode of the fuel cell 10 is connected with an air exhaust path 24 .
  • the end of this air exhaust path 24 has a back-pressure valve 241 .
  • the hydrogen tank 22 is connected to the anode of the fuel cell 10 via a hydrogen supply path 25 .
  • This hydrogen supply path 25 includes the above-described ejector 28 .
  • a pressure adjustment valve 251 is disposed between the hydrogen tank 22 and the ejector 28 .
  • the anode of the fuel cell 10 is connected with a hydrogen exhaust path 26 .
  • the end of this hydrogen exhaust path 26 has a purge valve 261 .
  • the hydrogen exhaust path 26 branches and is connected to the above-described ejector 28 .
  • the ejector 28 recovers hydrogen gas which has flowed into the hydrogen exhaust path 26 to reflux the hydrogen gas in the hydrogen supply path 25 .
  • the above-described air supply system 21 , back-pressure valve 241 , purge valve 261 , and pressure adjustment valve 251 are controlled by a control apparatus 30 .
  • Power generation by the fuel cell 10 is performed by a procedure described below.
  • the purge valve 261 is closed and the pressure adjustment valve 251 is opened, and hydrogen gas is supplied from the hydrogen tank 22 via the hydrogen supply path 25 to the anode of the fuel cell 10 .
  • the air supply system 21 is driven to supply air via the air supply path 23 to the cathode of the fuel cell 10 .
  • the hydrogen gas and air supplied to the fuel cell 10 are used for power generation. Thereafter, the hydrogen gas and air as well as residual water (e.g., generated water at anode side) flow from the fuel cell 10 into the hydrogen exhaust path 26 and the air exhaust path 24 . Meanwhile, since the purge valve 261 being closed the hydrogen gas flowing to the hydrogen exhaust path 26 is refluxed to the ejector 28 and reused.
  • the purge valve 261 and the back pressure valve 241 are opened to an appropriate extent to exhaust hydrogen gas, air, and residual water from the hydrogen exhaust path 26 and the air exhaust path 24 .
  • FIG. 2 illustrates a block diagram of the schematic structure of the air supply system 21 .
  • the air supply system 21 includes a compressor 41 which draws in air as gas to discharge the drawn in air at an increased pressure, and a silencer 42 which reduces the noise produced in the compressor 41 .
  • An inlet of the compressor 41 is connected with an intake flow path 43 in which air drawn in by the compressor 41 flows.
  • the inlet side of the intake flow path 43 has an air intake 431 in which a filter (not shown) filters out dust in air.
  • the compressor 41 is connected to the silencer 42 via a discharge flow path 44 in which air discharged from the compressor 41 flows.
  • a rectification apparatus 45 A as the first rectification apparatus and a rectification apparatus 45 B as the second rectification apparatus for rectifying gases are disposed in the vicinity of the compressor 41 .
  • FIG. 3 illustrates a partial enlarged view of the intake flow path 43 and the discharge flow path 44 .
  • the rectification apparatuses 45 A and 45 B have a honeycomb structure in which a plurality of plate-like members 452 divide, in a lattice-like manner, the internal spaces of the discharge flow path 44 and the intake flow path 43 to provide a plurality of rectification channels 451 extending along the discharge flow path 44 and the intake flow path 43 .
  • the rectification apparatus 45 A immediately rectifies the flow of air discharged from the discharge outlet of the compressor 41 to equalize the pressures variations, thereby reducing the pulsation noise and vibration due to the driving of the compressor 41 .
  • the rectification apparatus 45 B rectifies the flow of air to be drawn in by the inlet of the compressor 41 , thereby reducing noise such as wind roar noise (also referred to as siren noise) of the air.
  • wind roar noise also referred to as siren noise
  • FIG. 4 shows the first illustrative embodiment and a comparative example of the air supply system. More specifically, FIG. 4 shows a relation between noise level and a compressor revolution speed when the discharge outlet of a compressor includes the rectification apparatus.
  • an air supply system including the rectification apparatus can reduce noise in a wide range of revolution speeds more than in a case of the air supply system not including the rectification apparatus.
  • noise is greatly reduced at medium and high revolution speeds.
  • This embodiment provides the following advantages.
  • the rectification apparatus 45 for rectifying air is disposed at the intake flow path 43 and the discharge flow path 44 . Therefore, the turbulence associated with a shock wave caused by air intake and discharge is rectified and the sudden change of the air flow is suppressed so as to reduce the noise level in a wide range of revolution speeds. As a result, noise caused by air intake or discharge of air can be reduced in a wide frequency band. With only the addition of the rectification apparatuses 45 disposed at the inlet and discharge outlet of the compressor 41 , along with the space and cost can be reduced.
  • the rectification apparatus 45 constituted of a plurality of rectification channels 451 allows, even when drawn in air or discharged air flows backward, the air to stay in the rectification path 451 , thereby preventing the backflow of the air.
  • the second embodiment differs from the first embodiment in the position and shape of the rectification apparatuses 45 A and 45 B.
  • a rectification apparatus 45 A in an air supply system 21 A is abutted with the discharge outlet of the compressor 41 and a rectification apparatus 45 B is abutted with the inlet of the compressor 41 .
  • the number of rectification channels 451 of the rectification apparatuses 45 A and 45 B to the cross-sectional area of the discharge flow path 44 and the intake flow path 43 represent a density of the rectification apparatus. It is also assumed that the lengths of the rectification apparatuses 45 A and 45 B in the direction along which the discharge flow path 44 and the intake flow path 43 extend represent a length of the rectification apparatus.
  • FIG. 6 shows a relation between the volume of air discharged from the compressor and the pressure drop by the rectification apparatus.
  • a curve showing the change in the pressure drop of the rectification apparatus was obtained by approximating experiment values using a polynomial equation.
  • the density and length of the rectification apparatuses 45 A and 45 B are determined so as not to result in the pressure drop exceed the maximum value of the acceptable values.
  • FIG. 7 illustrates the second illustrative embodiment and a comparative example of the air supply system. More specifically, FIG. 7 shows a relation between a noise level and a compressor revolution speed when the rectification apparatus provided at the discharge outlet of the compressor has a different length.
  • FIG. 8 illustrates the third illustrative embodiment and a comparative example of the air supply system. More specifically, FIG. 8 shows a relation between a noise level and a compressor revolution speed when the density of the rectification apparatus provided at the discharge outlet of the compressor is changed.
  • This embodiment provides the following advantages in addition to the above-described advantages 1 and 2 .
  • the rectification apparatuses 45 A and 45 B abutted with the discharge outlet and inlet of the compressor 41 can significantly reduce noise caused when gas is discharged and drawn in.
  • the rectification apparatuses 45 A and 45 B have a maximum length in the direction along which the discharge flow path 44 and the intake flow path 43 extend within an acceptable range of the pressure drop by the rectification apparatuses 45 A and 45 B.
  • the noise caused by gas discharge and intake can be reduced while ensuring the discharge pressure required for the air supply system 21 .
  • the rectification apparatuses 45 A and 45 B has a honeycomb structure constituted of a plurality of rectification channels 451 extending along the discharge flow path so that the number of rectification channels 451 for the cross-sectional area of the discharge flow path 44 or the intake flow path 43 can be maximized resulting in the pressure drop by the rectification apparatuses 45 A and 45 B within the acceptable range.
  • the noise during gas discharge can be significantly reduced while ensuring the discharge pressure required for the air supply system 21 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compressor (AREA)
  • Fuel Cell (AREA)
US11/783,605 2006-04-11 2007-04-10 Air supply system Abandoned US20070237654A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006-108339 2006-04-11
JP2006108339 2006-04-11
JP2007102458A JP2007303461A (ja) 2006-04-11 2007-04-10 空気供給システム
JP2007-102458 2007-04-10

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US20070237654A1 true US20070237654A1 (en) 2007-10-11

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US11/783,605 Abandoned US20070237654A1 (en) 2006-04-11 2007-04-10 Air supply system

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JP (1) JP2007303461A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109895756A (zh) * 2017-12-08 2019-06-18 郑州宇通客车股份有限公司 一种供气系统及使用该供气系统的车辆

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5111126B2 (ja) * 2008-01-22 2012-12-26 本田技研工業株式会社 燃料電池自動車の消音器
JP6324737B2 (ja) * 2014-01-24 2018-05-16 株式会社日立産機システム 放気部の消音装置および消音装置を備えた圧縮機

Citations (22)

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US1906408A (en) * 1930-08-04 1933-05-02 Emerson Electric Mfg Co Fan
US3144201A (en) * 1961-05-09 1964-08-11 Plannair Ltd Blowers and rotary compressors
US3421687A (en) * 1967-01-20 1969-01-14 Buddy Z Daily Vertical air circulation fan
US3964519A (en) * 1974-11-18 1976-06-22 Air Monitor Corporation Fluid velocity equalizing apparatus
US4441333A (en) * 1982-07-15 1984-04-10 Thermo King Corporation Transport refrigeration unit combination airflow straightener and defrost damper
US5078574A (en) * 1990-11-19 1992-01-07 Olsen George D Device for minimizing room temperature gradients
US5088886A (en) * 1990-08-28 1992-02-18 Sinko Kogyo Co., Ltd. Inlet air flow conditioning for centrifugal fans
US5095707A (en) * 1990-02-12 1992-03-17 Fairchild Space And Defense Corporation Extraterrestrial planetary power supply and method
US5501101A (en) * 1994-01-25 1996-03-26 Purcell; James R. Demonstration wind tunnel
US5555637A (en) * 1994-10-14 1996-09-17 Production Engineered Designs, Inc. Drying apparatus
US5596152A (en) * 1994-03-21 1997-01-21 Instromet B.V. Flow straightener for a turbine-wheel gasmeter
US5938527A (en) * 1996-11-20 1999-08-17 Mitsubishi Denki Kabushiki Kaisha Air ventilation or air supply system
US6000423A (en) * 1998-05-13 1999-12-14 New York State Electric And Gas Corporation (Nyseg) Gas pressure maintenance booster system
US20010049036A1 (en) * 2000-06-02 2001-12-06 Stephen Raiser Compressor arrangement for the operation of a fuel cell system
US6488345B1 (en) * 2001-08-16 2002-12-03 General Motors Corporation Regenerative braking system for a batteriless fuel cell vehicle
US6725912B1 (en) * 1999-05-21 2004-04-27 Aero Systems Engineering, Inc. Wind tunnel and heat exchanger therefor
US6766590B2 (en) * 2002-07-15 2004-07-27 Wahl Clipper Corporation Hand held drying device
US6780534B2 (en) * 2001-04-11 2004-08-24 Donaldson Company, Inc. Filter assembly for intake air of fuel cell
US6783881B2 (en) * 2001-04-11 2004-08-31 Donaldson Company, Inc. Filter assembly for intake air of fuel cell
US6951697B2 (en) * 2001-09-11 2005-10-04 Donaldson Company, Inc. Integrated systems for use with fuel cells, and methods
US7089963B2 (en) * 2002-11-26 2006-08-15 David Meheen Flow laminarizing device
US7488377B2 (en) * 2002-06-21 2009-02-10 Daimler Ag Device for the intake and compression of at least one gas in fuel cell system

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US4409924A (en) * 1982-07-01 1983-10-18 National Semiconductor Corporation Self-adjusting plating mask
JPH11315784A (ja) * 1998-04-30 1999-11-16 Tochigi Fuji Ind Co Ltd 流体機械
JPH11325655A (ja) * 1998-05-14 1999-11-26 Matsushita Seiko Co Ltd 消音器および空気調和機
JP2002155860A (ja) * 2000-11-24 2002-05-31 Tochigi Fuji Ind Co Ltd 流体供給装置

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1906408A (en) * 1930-08-04 1933-05-02 Emerson Electric Mfg Co Fan
US3144201A (en) * 1961-05-09 1964-08-11 Plannair Ltd Blowers and rotary compressors
US3421687A (en) * 1967-01-20 1969-01-14 Buddy Z Daily Vertical air circulation fan
US3964519A (en) * 1974-11-18 1976-06-22 Air Monitor Corporation Fluid velocity equalizing apparatus
US4441333A (en) * 1982-07-15 1984-04-10 Thermo King Corporation Transport refrigeration unit combination airflow straightener and defrost damper
US5095707A (en) * 1990-02-12 1992-03-17 Fairchild Space And Defense Corporation Extraterrestrial planetary power supply and method
US5088886A (en) * 1990-08-28 1992-02-18 Sinko Kogyo Co., Ltd. Inlet air flow conditioning for centrifugal fans
US5078574A (en) * 1990-11-19 1992-01-07 Olsen George D Device for minimizing room temperature gradients
US5501101A (en) * 1994-01-25 1996-03-26 Purcell; James R. Demonstration wind tunnel
US5596152A (en) * 1994-03-21 1997-01-21 Instromet B.V. Flow straightener for a turbine-wheel gasmeter
US5555637A (en) * 1994-10-14 1996-09-17 Production Engineered Designs, Inc. Drying apparatus
US5938527A (en) * 1996-11-20 1999-08-17 Mitsubishi Denki Kabushiki Kaisha Air ventilation or air supply system
US6000423A (en) * 1998-05-13 1999-12-14 New York State Electric And Gas Corporation (Nyseg) Gas pressure maintenance booster system
US6725912B1 (en) * 1999-05-21 2004-04-27 Aero Systems Engineering, Inc. Wind tunnel and heat exchanger therefor
US20010049036A1 (en) * 2000-06-02 2001-12-06 Stephen Raiser Compressor arrangement for the operation of a fuel cell system
US6780534B2 (en) * 2001-04-11 2004-08-24 Donaldson Company, Inc. Filter assembly for intake air of fuel cell
US6783881B2 (en) * 2001-04-11 2004-08-31 Donaldson Company, Inc. Filter assembly for intake air of fuel cell
US6488345B1 (en) * 2001-08-16 2002-12-03 General Motors Corporation Regenerative braking system for a batteriless fuel cell vehicle
US6951697B2 (en) * 2001-09-11 2005-10-04 Donaldson Company, Inc. Integrated systems for use with fuel cells, and methods
US7488377B2 (en) * 2002-06-21 2009-02-10 Daimler Ag Device for the intake and compression of at least one gas in fuel cell system
US6766590B2 (en) * 2002-07-15 2004-07-27 Wahl Clipper Corporation Hand held drying device
US7089963B2 (en) * 2002-11-26 2006-08-15 David Meheen Flow laminarizing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109895756A (zh) * 2017-12-08 2019-06-18 郑州宇通客车股份有限公司 一种供气系统及使用该供气系统的车辆

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Owner name: HONDA MOTOR CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KASUYA, KURI;SUGAWARA, YOSHIHIRO;TAJIMA, TETSUYA;AND OTHERS;REEL/FRAME:019428/0628;SIGNING DATES FROM 20070416 TO 20070419

STCB Information on status: application discontinuation

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