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Improving thermal efficiency by reducing cooling losses in hydrogen combustion engines

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タイトル: Improving thermal efficiency by reducing cooling losses in hydrogen combustion engines
著者: Shudo, Toshio 著作を一覧する
キーワード: Hydrogen engine
Thermal efficiency
Cooling loss
Exhaust loss
Stratified charge
Combustion
発行日: 2007年12月
出版者: Elsevier Ltd.
誌名: International Journal of Hydrogen Energy
巻: 32
号: 17
開始ページ: 4285
終了ページ: 4293
出版社 DOI: 10.1016/j.ijhydene.2007.06.002
抄録: Hydrogen can be readily used in spark ignition engines as a clean alternative to fossil fuels. However, the higher burning velocity and shorter quenching distance of hydrogen compared with hydrocarbons cause a larger heat transfer from the burning gas to the combustion chamber walls. Because of this cooling loss, the thermal efficiency of hydrogen-fueled engines is sometimes lower than that of conventionally fueled engines. Therefore, reducing the cooling loss is a crucial element in improving the thermal efficiency of hydrogen combustion engines. Previous research by the author and others has proposed the direct injection stratified charge as a technique for reducing the cooling loss in hydrogen combustion and shown its effect in reducing cooling loss through experiments in a constant volume combustion vessel. However, it is known that a reduction in cooling loss does not always improve thermal efficiency due to a simultaneous increase in the exhaust heat loss. This paper explains the relation between cooling loss reduction and thermal efficiency improvements by the direct injection stratified charge in hydrogen combustion engines.
関連URI: http://www.sciencedirect.com/science/journal/03603199
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/30295
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 首藤 登志夫

 

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