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Analysis of Degree of Constant Volume and Cooling Loss in a Hydrogen Fuelled SI Engine
Technical Paper
2001-01-3561
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
Spring Fuels & Lubricants Meeting & Exhibition
SAE International Fall Fuels & Lubricants Meeting & Exhibition
Language:
English
Abstract
This study analyzes the factors influencing the thermal efficiency of a homogeneous charge spark-injection (SI) engine fuelled with hydrogen, focusing on the degree of constant volume and cooling loss. The cooling loss from the burning gas to the cylinder walls is quantitatively evaluated by analyzing the cylinder pressure diagram and exhaust gas composition. The degree of constant volume burning and constant volume cooling are also obtained by fitting the Wiebe function to the rate of heat release calculated using the cylinder pressure diagram. A comparison of combustion and cooling characteristics of hydrogen and methane combustion reveals that cooling loss in hydrogen combustion is higher than that of methane combustion due to the short quenching distance and rapid burning velocity during hydrogen combustion. It is also suggested that the high cooling loss observed during hydrogen combustion reduces thermal efficiency.
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Citation
Shudo, T. and Nabetani, S., "Analysis of Degree of Constant Volume and Cooling Loss in a Hydrogen Fuelled SI Engine," SAE Technical Paper 2001-01-3561, 2001, https://doi.org/10.4271/2001-01-3561.Also In
References
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