JP2006331676A - 燃料電池システム及びその運転方法 - Google Patents
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Abstract
【解決手段】燃料電池システム10は、燃料電池スタック12から排出される排ガスの一部を、改質器22を直接加熱するための熱源として前記改質器22に供給する第1加熱機構77aと、前記排ガスの残余を熱交換器18に供給するとともに、前記熱交換器18で発生する熱を、前記改質器22を間接加熱するための熱源として使用する第2加熱機構77bとを備える。改質器22には、温度センサ130a〜130dが装着され、これらの検出温度に基づいて開閉バルブ132を調整することにより、第1及び第2加熱機構77a、77bから改質器22に供給される熱量の比率が調整される。
【選択図】図1
Description
14、150…流体部 16…筐体
18…熱交換器 20、152…蒸発器
22…改質器 24…荷重付与機構
26…燃料電池 30…電解質
32…カソード電極 34…アノード電極
36…電解質・電極接合体 38…セパレータ
59…排ガス排出路 60a、60b…エンドプレート
66a、66b、72…筐体部 76…排ガス通路
77a、77b…加熱機構 78、80、82…通路部
83…整流孔 84…空気通路
85…空間 86…空気供給管
88…外筒部材 90…内筒部材
92…二重管 94a…外管
94b…内管 96…原燃料通路
98…水通路 100、114、116…孔部
101…混合燃料供給管 102…入口部
110、112…受け部材 118…触媒ペレット
120…改質用通路 122…出口部
124…改質ガス供給路 126…主排気管
128…排気管 129…筒状カバー
129a…断熱層 130a〜130d…温度センサ
132…開閉バルブ 134…制御装置
Claims (9)
- 電解質をアノード電極とカソード電極とで挟んで構成される電解質・電極接合体とセパレータとが積層される燃料電池を設け、複数の前記燃料電池が積層される燃料電池スタックと、酸化剤ガスを前記燃料電池スタックに供給する前に加熱する熱交換器と、炭化水素を主体とする原燃料と水蒸気との混合燃料を改質して改質ガスを生成する改質器とを備える燃料電池システムであって、
発電反応に使用されて前記燃料電池スタックから排出される排ガスの一部を、前記改質器を直接加熱するための熱源として前記改質器に供給する第1加熱機構と、
前記排ガスの残余を、前記酸化剤ガスを加熱するための熱源として前記熱交換器に供給するとともに、前記熱交換器で発生する熱を、前記改質器を間接加熱するための熱源として前記改質器に供給する第2加熱機構と、
前記改質器の温度を検出する温度検出部と、
前記第1加熱機構に供給される排ガス流量を調整するバルブ機構と、
前記改質器を予め設定された改質条件値に維持するために、検出された前記改質器の温度に基づいて前記バルブ機構を調整し、前記第1加熱機構及び前記第2加熱機構から前記改質器に供給される熱量の比率を調整するバルブ制御機構と、
を備えることを特徴とする燃料電池システム。 - 請求項1記載の燃料電池システムにおいて、前記改質器及び前記熱交換器は、前記燃料電池スタックに近接して配設されるとともに、
前記熱交換器は、前記改質器の外側に配設されることにより、前記熱交換器と前記改質器との間には、前記第2加熱機構を構成する間接加熱用空間が形成されることを特徴とする燃料電池システム。 - 請求項1又は2記載の燃料電池システムにおいて、前記改質器は、前記混合燃料を改質器内部に流入する入口部と、
改質後の改質ガスを前記燃料電池スタックに供給する出口部と、
を有するとともに、
前記入口部は、前記第1加熱機構を構成する排ガス導出部に近接して配置されることを特徴とする燃料電池システム。 - 請求項1乃至3のいずれか1項に記載の燃料電池システムにおいて、前記改質条件値は、前記改質器の温度及び前記原燃料に対する炭素と前記水蒸気とのモル比を含むことを特徴とする燃料電池システム。
- 請求項1乃至4のいずれか1項に記載の燃料電池システムにおいて、前記混合燃料を生成するために、水を蒸発させる蒸発器を備え、
前記熱交換器、前記蒸発器及び前記改質器を含む流体部は、前記燃料電池スタックの一方の側に配置されるとともに、
前記流体部は、前記燃料電池スタックの中心軸に対して軸対称に配設されることを特徴とする燃料電池システム。 - 請求項1乃至5のいずれか1項に記載の燃料電池システムにおいて、前記熱交換器に沿う前記排ガスの残余の流れ方向と、前記改質器に沿う前記混合燃料の流れ方向とは、略平行流に設定されることを特徴とする燃料電池システム。
- 電解質をアノード電極とカソード電極とで挟んで構成される電解質・電極接合体とセパレータとが積層される燃料電池を設け、複数の前記燃料電池が積層される燃料電池スタックと、酸化剤ガスを前記燃料電池スタックに供給する前に加熱する熱交換器と、炭化水素を主体とする原燃料と水蒸気との混合燃料を改質して改質ガスを生成する改質器とを備える燃料電池システムの運転方法であって、
発電反応に使用されて前記燃料電池スタックから排出される排ガスの一部を、前記改質器を直接加熱するための熱源として前記改質器に供給する工程と、
前記排ガスの残余を、前記酸化剤ガスを加熱するための熱源として前記熱交換器に供給するとともに、前記熱交換器で発生する熱を、前記改質器を間接加熱するための熱源として前記改質器に供給する工程と、
前記改質器の温度を検出する工程と、
検出された前記改質器の温度に基づいて前記改質器に供給される排ガス流量を調整することにより、前記改質器を予め設定された改質条件値に維持する工程と、
を有することを特徴とする燃料電池システムの運転方法。 - 請求項7記載の運転方法において、前記改質条件値は、前記改質器の温度及び前記原燃料に対する炭素と前記水蒸気とのモル比を含むことを特徴とする燃料電池システムの運転方法。
- 請求項7又は8記載の運転方法において、前記熱交換器に沿う前記排ガスの残余の流れ方向と、前記改質器に沿う前記混合燃料の流れ方向とは、略平行流に設定されることを特徴とする燃料電池システムの運転方法。
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JP2005149344A JP4555149B2 (ja) | 2005-05-23 | 2005-05-23 | 燃料電池システム及びその運転方法 |
US11/919,730 US8404394B2 (en) | 2005-05-23 | 2006-05-23 | Fuel cell system and method of operating the fuel cell system |
AT06756658T ATE450063T1 (de) | 2005-05-23 | 2006-05-23 | Brennstoffzellensystem und verfahren zum betrieb des brennstoffzellensystems |
PCT/JP2006/310612 WO2006126701A1 (en) | 2005-05-23 | 2006-05-23 | Fuel cell system and method of operating the fuel cell system |
EP06756658A EP1920488B1 (en) | 2005-05-23 | 2006-05-23 | Fuel cell system and method of operating the fuel cell system |
DE602006010721T DE602006010721D1 (de) | 2005-05-23 | 2006-05-23 | Brennstoffzellensystem und verfahren zum betrieb des brennstoffzellensystems |
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EP (1) | EP1920488B1 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008285355A (ja) * | 2007-05-16 | 2008-11-27 | Nippon Oil Corp | 改質器および間接内部改質型高温型燃料電池 |
JP2009037871A (ja) * | 2007-08-01 | 2009-02-19 | Honda Motor Co Ltd | 燃料電池システム及びその運転方法 |
Families Citing this family (4)
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JP5809365B2 (ja) * | 2011-12-23 | 2015-11-10 | ポスコエナジー株式会社Poscoenergy Co.,Ltd. | 燃料電池用加湿熱交換器 |
JP6248376B2 (ja) * | 2012-06-19 | 2017-12-20 | 日産自動車株式会社 | 固体酸化物型燃料電池システム |
DE102014213102A1 (de) * | 2014-07-07 | 2016-01-07 | Robert Bosch Gmbh | Brennstoffzellenvorrichtung |
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Also Published As
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US8404394B2 (en) | 2013-03-26 |
US20090047554A1 (en) | 2009-02-19 |
DE602006010721D1 (de) | 2010-01-07 |
EP1920488B1 (en) | 2009-11-25 |
JP4555149B2 (ja) | 2010-09-29 |
WO2006126701A1 (en) | 2006-11-30 |
EP1920488A1 (en) | 2008-05-14 |
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