JPS6351060A - Fuel cell power generation system - Google Patents
Fuel cell power generation systemInfo
- Publication number
- JPS6351060A JPS6351060A JP61192680A JP19268086A JPS6351060A JP S6351060 A JPS6351060 A JP S6351060A JP 61192680 A JP61192680 A JP 61192680A JP 19268086 A JP19268086 A JP 19268086A JP S6351060 A JPS6351060 A JP S6351060A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- battery
- main body
- supply system
- fuel
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 37
- 238000010248 power generation Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 49
- 239000012495 reaction gas Substances 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 7
- 239000004480 active ingredient Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 abstract description 12
- 230000001681 protective effect Effects 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000009993 protective function Effects 0.000 abstract 1
- 239000000376 reactant Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the fuel cell
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
- H01M8/04395—Pressure; Ambient pressure; Flow of cathode reactants at the inlet or inside the fuel cell
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04574—Current
- H01M8/04589—Current of fuel cell stacks
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04955—Shut-off or shut-down of fuel cells
-
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は燃料電池発電システムに係り、特にガス不足運
転防止に好適な燃料電池発電システムに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuel cell power generation system, and particularly to a fuel cell power generation system suitable for preventing gas starvation operation.
燃温電池は供給される燃料中の水素と酸化剤中の酸素と
が電気化学的に反応する際のエネルギーを、直流電力お
よび熱として取り出し、有効利用するものである。従っ
て供給ガスの量、すなわちエネルギーによって取り出し
得る最大直流電力が決まる。また、化学反応を伴うエネ
ルギー変換系であるため、理論上の電力、すなわち有効
成分を１００％利用した電力を取り出すことは不可能で
あり、一般にある程度過剰な反応物質を供給することが
必要である。この過剰量を表わすものとして、次式で示
される利用率がある。A fuel temperature cell extracts and effectively utilizes the energy generated when hydrogen in a supplied fuel and oxygen in an oxidizer electrochemically react as DC power and heat. Therefore, the amount of supplied gas, that is, the energy, determines the maximum DC power that can be extracted. Furthermore, since it is an energy conversion system that involves chemical reactions, it is impossible to extract theoretical power, that is, power that utilizes 100% of the active ingredient, and it is generally necessary to supply a certain amount of excess reactant. . This excess amount is expressed by the utilization rate expressed by the following equation.
反応物質の利用率（％＞ ＝ ＜ｍ！ｊＦ電池出力電流
に電気化学的に当量の反応物質量÷燃料電池に供給され
た反応物質流量）Ｘ１００
また、一般に利用率と電池出力との関係は縦軸に電池出
力をとり横軸にガス利用＃ｉをとって、ガス利用率と電
池出力との関係が示されている第２図に示されているよ
うに、ある利用率り以上になると、急激に出力が低下す
る。従って利用率り点以下に反応物質の利用率を下げて
運転する必要がある。従来の燃料電池はこのような特性
上、出力電流をパラメータとして供給ガス基を制御する
方法がとられていた。なおこれに関するものとして特開
昭６０−５６３７４号公報がある。Utilization rate of reactant (%> = <m!jF Amount of reactant electrochemically equivalent to cell output current ÷ Flow rate of reactant supplied to the fuel cell) x 100 In addition, in general, the relationship between utilization rate and battery output is As shown in Figure 2, which shows the relationship between gas utilization rate and battery output, with battery output on the vertical axis and gas usage #i on the horizontal axis, when the usage rate exceeds a certain level, , the output drops suddenly. Therefore, it is necessary to operate by lowering the utilization rate of the reactant below the utilization rate point. Due to these characteristics, conventional fuel cells have adopted a method of controlling the supply gas base using the output current as a parameter. Regarding this, there is Japanese Patent Laid-Open No. 60-56374.
上記従来技術ではガス供給系統に不具合が生じてガス供
給量が不足した場合に、電池の直流電力が低下するまで
その不具合に気づかず、仮りに電池出力下限値を設けて
保護動作を行った場合でも、ある時間電池はガス供給量
から見て過負荷状態。In the conventional technology described above, when a problem occurs in the gas supply system and the gas supply amount is insufficient, the problem is not noticed until the DC power of the battery decreases, and a protective operation is performed by setting a lower limit on battery output. However, at certain times the battery is overloaded based on the amount of gas supplied.
換言すればガス欠状態で運転されることになり、電池を
損傷する恐れがあった。In other words, the vehicle would be operated without gas, which could damage the battery.
本発明は以上の点に鑑もなされたものであり、制御上の
不具合が生じた場合でも電池がガス不足状態で運転され
るのを防止することを可能とした燃料電池発電システム
を提供することを目的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a fuel cell power generation system that can prevent the battery from being operated in a gas-starved state even if a control malfunction occurs. The purpose is to
上記目的は、入口ガス流量と直流電流値とからガス利用
率を計算する演算器を有する保護装置ｆ？を主制御系統
とは別に設け、常に利用率を監視して、利用率がある一
定値以上になったら停止動作等の保護動作に入るように
することにより、達成される。The above purpose is a protection device f? having a calculator that calculates the gas utilization rate from the inlet gas flow rate and the DC current value. This is achieved by providing a system separately from the main control system, constantly monitoring the utilization rate, and entering a protective operation such as a shutdown operation when the utilization rate exceeds a certain value.
演算器では実測された直流電流とガス流量とから、上記
利用率の計算式に基づき利用率を演算する。電気化学的
に当量な物質量は単位変換定数をに、、 ｆｌ！気化学
的定数をに、、電流を工、直列電池数をＮとした場合に
、式次で求まる。The computing unit calculates the utilization rate based on the above-mentioned utilization rate calculation formula from the actually measured direct current and gas flow rate. The electrochemically equivalent amount of substance is determined by the unit conversion constant, fl! When the gas chemical constant is , the current is , and the number of series batteries is N, it can be found by the following formula.
電気化学的な当量＝に、−に日・Ｉ−Ｎ演算結果と予め
設定される利用率上限値とを比較して、上限値を越えた
場合に保護動作に入るように保護装置を構成することに
よって、電池がガス不足状態で運転されることが防止で
きる。従って電池損傷を未然に防止することができる。The protection device is configured to compare the electrochemical equivalent = to - to the I-N calculation result with a preset utilization rate upper limit, and to enter a protective operation if the upper limit is exceeded. This prevents the battery from being operated in a gas-starved state. Therefore, damage to the battery can be prevented.
以下、図示した実施例に基づいて本発明を説明する。第
１図には本発明の一実施例が示されている。同図に示さ
れているように燃料電池発電システムは電池本体１．こ
の電池本体１に反応ガスを給排する燃料供給系統２およ
び配化剤供給系統３を備えている。そして燃料供給系状
２には燃料入口流量計４．酸化剤供給系Ｍ３には酸化剤
入口流量計５が設けられ、電池本体１にはその直流電流
値を検出する直流電流検出装置６が設けられている。こ
のように↑、弯成された燃料電池発電システムで本実施
例ではシステムに、電池本体１の運転中に直流電流検出
装置１￥６で検出した直流電流値と。The present invention will be explained below based on the illustrated embodiments. FIG. 1 shows an embodiment of the invention. As shown in the figure, the fuel cell power generation system consists of a battery main body 1. The battery main body 1 is provided with a fuel supply system 2 and a distribution agent supply system 3 for supplying and discharging a reaction gas. The fuel supply system 2 includes a fuel inlet flowmeter 4. The oxidizing agent supply system M3 is provided with an oxidizing agent inlet flowmeter 5, and the battery body 1 is provided with a DC current detection device 6 for detecting the DC current value. In the fuel cell power generation system constructed in this way, in this embodiment, the system uses the DC current value detected by the DC current detection device 1\6 while the battery main body 1 is in operation.
燃料、酸化剤供給系統２，３で測定した電池本体 。Battery body measured in fuel and oxidizer supply systems 2 and 3.
１人口側のガス流量とを比較してガス利用率を演算する
演算器７を備えた保護装置を設けて、ガス利用率が一定
値以上になったら電池の運転を停止するようにした。A protection device equipped with a calculator 7 that calculates the gas utilization rate by comparing the gas flow rate for one population side is provided, and the operation of the battery is stopped when the gas utilization rate exceeds a certain value.
このようにすることによりシステムに、電池本体１の運
転中に直流電流検出装置ｉ！６で検出した直流電流値と
、燃料、！！２化剤供給系統２，３で測定した電池本体
１人口側のガス流量とを比較してガス利用率を演算する
演算器７を備えた保護装置が設けられ、ガス利用率が一
定値以上になったら′ｆｉ池の運転が停止されるように
なって、電池がガス不足状態で運転されるのが防止され
るようになり、制御上の不具合が生じた場合でも電池が
ガス不足状態で運転されるのを防止することを可能とし
た燃料電池発電システムを得ることができる。By doing this, the system has a direct current detection device i! while the battery main body 1 is operating. The DC current value detected in step 6 and the fuel! ! A protection device is provided that includes a calculator 7 that calculates the gas utilization rate by comparing the gas flow rate on the population side of the battery main body 1 measured by the dualizing agent supply systems 2 and 3, and prevents the gas utilization rate from exceeding a certain value. When this occurs, the operation of the 'fi pond will be stopped and the battery will be prevented from operating in a gas starved state.Even if a control problem occurs, the battery will not be operated in a gas starved state. It is possible to obtain a fuel cell power generation system that makes it possible to prevent this from occurring.
すなわちガス供給系統である燃料供給系！ａ２゜酸化剤
供給系Ｊ１３に設けられた燃料入口流旦計４および酸化
剤入口流量計５により測定したガス流量と、電池本体１
の直流電流検出装置６により測定した直流電流値とを、
演算器７によりガス利用率に変換して中央制御系統８へ
出力し、予め設定した上限利用率を越えた場合、適切な
保護動作に移行するように保護回路を組んでおく。なお
同図において破線は電気的信号である。このようにする
ことによりガス利用率が上限利用率を越えた場合は主制
御系統とは３１１に電池の運転が停止されるようになり
、制御上の不具合が生じた場合でも電池のガス不足状態
での運転が防止でき、電池の損傷を防止することができ
る。In other words, the fuel supply system is the gas supply system! a2゜The gas flow rate measured by the fuel inlet flowmeter 4 and the oxidizer inlet flowmeter 5 provided in the oxidizer supply system J13 and the battery main body 1
The DC current value measured by the DC current detection device 6 of
The arithmetic unit 7 converts it into a gas utilization rate and outputs it to the central control system 8, and a protection circuit is constructed so that if the gas utilization rate exceeds a preset upper limit, an appropriate protective operation is initiated. In addition, in the same figure, the broken line is an electrical signal. By doing this, if the gas utilization rate exceeds the upper limit utilization rate, the main control system will stop the operation of the battery in 311, and even if a control malfunction occurs, the battery will be in a state of gas shortage. It is possible to prevent over-driving and prevent damage to the battery.
なお、燃料として化石燃料を改質して用いるような発電
システムでは、燃料の流景の他に燃料組成を監視する必
要がある。この場合に燃料入口側にガス成分々析計を設
け、ガス量と有効成分濃度とにより、ガス利用率を演算
させろように保護装置を構成すればよい。In addition, in a power generation system that uses reformed fossil fuel as fuel, it is necessary to monitor the fuel composition in addition to the flow of the fuel. In this case, the protection device may be configured so that a gas component analyzer is provided on the fuel inlet side and the gas utilization rate is calculated based on the gas amount and the concentration of the active ingredient.
上述のように本発明は制御上の不具合が生じた場合でも
電池がガス不足状態で運転されるのが防止されるように
なって、制御上の不具合が生じた場合でも電池がガス不
足状態で運転されるのを防止することを可能とした燃料
１１池発電システムを得ることができろ。As described above, the present invention prevents the battery from being operated in a gas-starved state even if a control malfunction occurs; It is possible to obtain a fuel 11 pond power generation system that can be prevented from being operated.
第１図は本発明の燃料電池発電システムの一実施例の発
電システムフロー図、第２図は一般的なガス利用率と電
池出力との関係を示す特性図である。
１・・・電池本体、２・・燃料供給系統（ガス供給系統
）、３・・・酸化剤供給系統（ガス供給系統）、４・・
・燃料入口流量計、５・・・酸化剤入口流量計、６・・
・直流電流検出装置、７・・・演算器、８・・・中央制
御系統。FIG. 1 is a power generation system flowchart of an embodiment of the fuel cell power generation system of the present invention, and FIG. 2 is a characteristic diagram showing a general relationship between gas utilization rate and battery output. 1... Battery body, 2... Fuel supply system (gas supply system), 3... Oxidizer supply system (gas supply system), 4...
・Fuel inlet flow meter, 5... Oxidizer inlet flow meter, 6...
- DC current detection device, 7... Arithmetic unit, 8... Central control system.
Claims (1)
体に配化剤、燃料の反応ガスを給排するガス供給系統を
備え、前記電池本体にはその直流電流を検出する直流電
流検出装置が設けられている燃料電池発電システムにお
いて、前記システムに、前記電池本体の運転中に前記直
流電流検出装置で検出した直流電流値と、前記ガス供給
系統で測定した前記電池本体入口側のガス流量とを比較
してガス利用率を演算する演算器を備えた保護装置を設
け、前記ガス利用率が一定値以上になつたら前記電池の
運転を停止するようにしたことを特徴とする燃料電池発
電システム。 ２、前記保護装置が、前記燃料の電池本体への入口側に
ガス成分検出器を設け、前記入口側のガス流量を有効成
分のガス量として検出するように形成されたものである
特許請求の範囲第１項記載の燃料電池発電システム。 ３、前記保護装置が、前記ガス利用率が一定値以上で電
池が運転されるのを防止する動作が、前記システムの主
制御系統とは別に行うように形成されたものである特許
請求の範囲第１項記載の燃料電池発電システム。[Scope of Claims] 1. A battery body composed of a plurality of single cells, a gas supply system for supplying and discharging a coordinating agent and a reaction gas of fuel to the battery body, and a direct current of the battery body is provided. In a fuel cell power generation system that is provided with a DC current detection device for detecting, the system includes a DC current value detected by the DC current detection device during operation of the battery main body, and a DC current value measured by the gas supply system of the battery. A protection device is provided that includes a calculator that calculates the gas utilization rate by comparing the gas flow rate at the inlet of the main body, and the operation of the battery is stopped when the gas utilization rate exceeds a certain value. Characteristic fuel cell power generation system. 2. The protection device is configured to include a gas component detector on the inlet side of the fuel into the cell main body, and to detect the gas flow rate on the inlet side as the amount of active ingredient gas. The fuel cell power generation system according to scope 1. 3. Claims in which the protection device is formed so that the operation of preventing the battery from being operated when the gas utilization rate exceeds a certain value is performed separately from the main control system of the system. The fuel cell power generation system according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61192680A JPS6351060A (en) | 1986-08-20 | 1986-08-20 | Fuel cell power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61192680A JPS6351060A (en) | 1986-08-20 | 1986-08-20 | Fuel cell power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6351060A true JPS6351060A (en) | 1988-03-04 |
Family
ID=16295256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61192680A Pending JPS6351060A (en) | 1986-08-20 | 1986-08-20 | Fuel cell power generation system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6351060A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0461755A (en) * | 1990-06-28 | 1992-02-27 | Tohoku Electric Power Co Inc | Operation control system of fuel cell power generating device |
| US5241106A (en) * | 1991-10-22 | 1993-08-31 | Mitsui Toatsu Chemicals, Inc. | Process for producing ethyl acetate |
| JP2000067895A (en) * | 1998-08-19 | 2000-03-03 | Toshiba Corp | Fuel cell power generating system |
| JP2004342617A (en) * | 2004-06-16 | 2004-12-02 | Equos Research Co Ltd | Display device of fuel cell vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158557A (en) * | 1984-01-27 | 1985-08-19 | Mitsubishi Electric Corp | Fuel cell power generating system |
| JPS60241661A (en) * | 1984-05-15 | 1985-11-30 | Mitsubishi Electric Corp | Fuel cell protector |
| JPS6151772A (en) * | 1984-08-18 | 1986-03-14 | Mitsubishi Electric Corp | Flow rate controller of fuel cell system |
| JPS6188463A (en) * | 1984-10-08 | 1986-05-06 | Fuji Electric Co Ltd | Method of measuring volume of internal air leakage in matrix type fuel cell |
-
1986
- 1986-08-20 JP JP61192680A patent/JPS6351060A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158557A (en) * | 1984-01-27 | 1985-08-19 | Mitsubishi Electric Corp | Fuel cell power generating system |
| JPS60241661A (en) * | 1984-05-15 | 1985-11-30 | Mitsubishi Electric Corp | Fuel cell protector |
| JPS6151772A (en) * | 1984-08-18 | 1986-03-14 | Mitsubishi Electric Corp | Flow rate controller of fuel cell system |
| JPS6188463A (en) * | 1984-10-08 | 1986-05-06 | Fuji Electric Co Ltd | Method of measuring volume of internal air leakage in matrix type fuel cell |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0461755A (en) * | 1990-06-28 | 1992-02-27 | Tohoku Electric Power Co Inc | Operation control system of fuel cell power generating device |
| US5241106A (en) * | 1991-10-22 | 1993-08-31 | Mitsui Toatsu Chemicals, Inc. | Process for producing ethyl acetate |
| JP2000067895A (en) * | 1998-08-19 | 2000-03-03 | Toshiba Corp | Fuel cell power generating system |
| JP2004342617A (en) * | 2004-06-16 | 2004-12-02 | Equos Research Co Ltd | Display device of fuel cell vehicle |
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