HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Improving thermal efficiency by reducing cooling losses in hydrogen combustion engines

Files in This Item:
IJHE32-17.pdf439.5 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Improving thermal efficiency by reducing cooling losses in hydrogen combustion engines
Authors: Shudo, Toshio Browse this author
Keywords: Hydrogen engine
Thermal efficiency
Cooling loss
Exhaust loss
Stratified charge
Issue Date: Dec-2007
Publisher: Elsevier Ltd.
Journal Title: International Journal of Hydrogen Energy
Volume: 32
Issue: 17
Start Page: 4285
End Page: 4293
Publisher DOI: 10.1016/j.ijhydene.2007.06.002
Abstract: 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.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 首藤 登志夫

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University