Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 44, Issue 20, Pages 3143-3150Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0196-8904(03)00127-4
Keywords
power generation; supercharging; fuel economy; hydrogen; pollution; ICE; clean energy
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Hydrogen is found to be a suitable alternative fuel for spark ignition engines with certain drawbacks, such as high NOx emission and small power output. However, supercharging may solve such problems. In this study, the effects of equivalence ratio, compression ratio and inlet pressure on the performance and NOx emission of a four stroke supercharged hydrogen engine have been analyzed using a specially developed computer program. The results are verified and compared with experimental data obtained from tests on a Ricardo E6/US engine. A chart specifying the safe operation zone of the hydrogen engine has been produced. The safe operation zone means no pre-ignition, acceptable NOx emission, high engine efficiency and lower specific fuel consumption in comparison with the gasoline engine. The study also shows that supercharging is a more effective method to increase the output of a hydrogen engine rather than increasing the compression ratio of the engine at the knock limited equivalence ratio. (C) 2003 Elsevier Ltd. All rights reserved.
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