JP2009008033A - エンジンシステム - Google Patents
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Abstract
本発明の目的は、水素の貯蔵と放出を化学的に繰り返す媒体を搭載したエンジンシステムにおいて、CO2 の排出を抑制でき、システム効率に優れたエンジンシステムを提供することを目的とする。
【解決手段】
水素の貯蔵と放出を化学的に繰り返す媒体から水素リッチガスを生成する水素供給装置を備え、前記水素供給装置で生成した水素リッチガスを燃料の一つとして、エンジンを駆動するエンジンシステムにおいて、前記エンジンの廃熱を前記水素供給装置へ供給する廃熱供給装置と、前記エンジンの動力で発電する発電機と、前記発電機で発電した電力を充電する電力貯蔵装置と、前記電力貯蔵装置から放電した電力を動力へ変換するモータとを備えたことを特徴とするエンジンシステム。
【選択図】図1
Description
…式(1)
上記式(1)により、生成したトルエンと水素を分離装置12で、トルエンと水素に分離し、水素をエンジン5へ供給し、トルエンは、脱水素化媒体タンク2へ回収される。エンジン5に供給する水素は、トルエン、または、メチルシクロヘキサンが混合する可能性があるため、以下、水素リッチガスとする。式(1)よりメチルシクロヘキサンから水素1mol を生成するためには約68kJ/mol の熱量が必要である。そのため、水素供給装置3へエンジン5のガスを供給する構成である。反応温度を所定範囲内(250〜400℃)にするために、エンジン5の排ガスは、排ガス流量調整装置13により、水素供給装置3へ供給する排ガス流量を調整する。エンジン5は、発電機6と接続し、発電機6で発電した電力は、電力貯蔵装置7へ充電される。電力貯蔵装置7は、電力変換装置も含む。電力貯蔵装置7からモータ8へ放電し、タイヤ10に動力を伝達する。また、タイヤ10の減速時は、発電機9により回生エネルギーを生成し、電力貯蔵装置7へ充電される。水素供給装置3に反応式(1)にて必要な熱量が不足する際、燃焼器4または電力貯蔵装置7よりヒータ11を介し、熱量を供給する。ヒータ11への電力供給は、電力貯蔵装置7にて電力を貯蔵せずに、電力変換のみを行いモータへ放電してもよい。燃焼器4へは、水素リッチガスを供給するが、必要に応じて脱水素媒体を供給してもよい。図1の構成により、貯蔵燃料は、液体燃料である水素化媒体を用い、動力を生成する際に、水素供給装置3にて、水素リッチガスを生成し、エンジン5に供給し、動力を生成する構成となる。安全性,利便性およびエネルギー密度の高い、液体燃料を貯蔵して、全体システムとしてCO2が排出されずに動力を生成する構成となる。
Q1が決定することで、式(1)より、水素1mol 生成するのに必要な熱量が68kJであるので、S204にて、水素供給装置3にて生成可能な水素量F2が決定する。一方、S201でエンジン5の運転状態が決まると、エンジンの熱効率が決まり、S205にてエンジン5へ必要な水素量F1が決定する。図1の構成にて、燃費をよくするには、媒体の消費率を小さくする必要がある。そのためには、下記の値を考慮する必要がある。
・Pe/(F1・LH2)
ただし、Peは、エンジン5の出力とする。LH2は水素の低位発熱量とする。
2 脱水素化媒体タンク
3 水素供給装置
4 燃焼器
5 エンジン
6,9 発電機
7 電力貯蔵装置
8 モータ
10 タイヤ
11 ヒータ
12 分離装置
13 排ガス流量調整装置
14 水素リッチガス供給装置
15 点火装置
16 混合装置
17,25 酸素濃度検出装置
18 水素流路
19 スペーサ
20 水素分離膜
21 流路突起
22 高熱伝導基板
23 燃料流路
24 触媒層
Claims (14)
- 水素の貯蔵と放出を化学的に繰り返す媒体から水素リッチガスを生成する水素供給装置を備え、前記水素供給装置で生成した水素リッチガスを燃料の一つとして、エンジンを駆動するエンジンシステムにおいて、
前記エンジンの廃熱を前記水素供給装置へ供給する廃熱供給装置と、エンジンの動力で発電する発電機と、前記発電機で発電した電力を充電する電力貯蔵装置と、前記電力貯蔵装置から放電した電力を動力へ変換するモータとを備えたことを特徴とするエンジンシステム。 - 請求項1に記載のエンジンシステムにおいて、ユーザの要求する要求動力に対して、前記電力貯蔵装置からモータへ出力する電力を制御し、
前記電力貯蔵装置の残量、又は、前記要求動力に基づいてエンジン出力を決定し、エンジン回転数及びエンジントルクを制御する制御装置を備えたことを特徴とするエンジンシステム。 - 請求項2に記載のエンジンシステムにおいて、前記制御装置が、前記要求動力に基づいて決定されたエンジン出力と前記媒体の消費率に基づき、エンジン回転数及びエンジントルクを制御することを特徴とするエンジンシステム。
- 請求項1に記載のエンジンシステムにおいて、前記廃熱供給装置がエンジンからの廃熱量を調整する廃熱量調整装置を有することを特徴とするエンジンシステム。
- 請求項4に記載のエンジンシステムにおいて、前記水素供給装置の触媒温度を推定または検出する触媒温度推定装置を備え、前記廃熱量調整装置は触媒温度に基づいて廃熱量を調整することを特徴とするエンジンシステム。
- 請求項1に記載のエンジンシステムにおいて、
前記媒体または前記水素供給装置で生成した前記水素リッチガスを燃焼する燃焼装置と、ヒータの少なくとも一つを備え、
前記燃焼装置又はヒータの熱を前記水素供給装置へ供給することを特徴とするエンジンシシステム。 - 請求項4に記載のエンジンシステムにおいて、前記水素供給装置の触媒温度を推定または検出する触媒温度推定装置を備え、
前記燃焼装置または前記ヒータまたは前記廃熱量調整装置は、エンジンの運転状態及び前記触媒温度に基づいて制御することを特徴とするエンジンシステム。 - 請求項6に記載のエンジンシステムにおいて、前記水素供給装置は、前記エンジンの排気管に搭載され、前記燃焼装置は、水素リッチガスを排ガス中に供給する水素リッチガス供給装置と、排ガスと前記水素リッチガスの混合ガスを点火する点火装置を備えていることを特徴とするエンジンシステム。
- 請求項8に記載のエンジンシステムにおいて、前記燃焼装置と前記エンジンとの間の排ガスの酸素濃度を検出する酸素濃度検出装置、前記燃焼装置の下流側の排ガスに含まれる酸素濃度を検出する酸素濃度検出装置のうち少なくとも一つを備えたことを特徴とするエンジンシステム。
- 請求項9に記載のエンジンシステムにおいて、前記酸素濃度検出装置の値をもとに前記燃焼装置に供給する前記水素リッチガスまたは前記媒体の供給量を制御することを特徴とするエンジンシステム。
- 請求項6に記載のエンジンシステムにおいて、前記燃焼装置が排気管に設置され、前記燃焼装置の設置場所の排気管上流側、および排気管下流側の両方に前記水素供給装置が備えられていることを特徴とするエンジンシステム。
- 請求項11に記載のエンジンシステムにおいて、前記排気管上流側の排ガスの酸素濃度を検出する酸素濃度検出装置を備え、前記酸素濃度が所定値以下の場合、前記燃焼装置の利用を禁止することを特徴とする水素供給装置を備えたエンジンシステム。
- 請求項5に記載のエンジンシステムにおいて、前記水素供給装置の触媒温度が所定温度以下でかつ、前記電力貯蔵装置の貯蔵量が所定以下の場合、前記媒体をエンジンに供給することを特徴とする水素供給装置を備えたエンジンシステム。
- 請求項11に記載のエンジンシステムにおいて、前記排気管上流側の前記水素供給装置
で生成した水素を前記燃焼装置へ供給することを特徴とするエンジンシステム。
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CN2008101102863A CN101332761B (zh) | 2007-06-29 | 2008-06-26 | 发动机*** |
US12/146,498 US8397680B2 (en) | 2007-06-29 | 2008-06-26 | Engine system |
DE102008030573A DE102008030573A1 (de) | 2007-06-29 | 2008-06-27 | Motorsystem |
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JP2014084792A (ja) * | 2012-10-24 | 2014-05-12 | Hitachi Ltd | コージェネレーションシステム |
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JP5211115B2 (ja) * | 2010-06-28 | 2013-06-12 | 三菱重工業株式会社 | ガスエンジンの給気冷却器のドレン装置 |
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- 2008-06-26 CN CN2008101102863A patent/CN101332761B/zh not_active Expired - Fee Related
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WO2010095212A1 (ja) * | 2009-02-17 | 2010-08-26 | トヨタ自動車株式会社 | エンジンの暖機システム |
JP2014084792A (ja) * | 2012-10-24 | 2014-05-12 | Hitachi Ltd | コージェネレーションシステム |
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DE102008030573A1 (de) | 2009-01-29 |
CN101332761A (zh) | 2008-12-31 |
CN101332761B (zh) | 2012-07-04 |
JP4483901B2 (ja) | 2010-06-16 |
US20090000575A1 (en) | 2009-01-01 |
US8397680B2 (en) | 2013-03-19 |
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