نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this study, effects on a spark ignition engine of pure compressed natural gas (CNG) and mixtures of
CNG and hydrogen (Hythane) have been experimentally considered. In this study, three types of fuel including
pure CNG, Hythane with 15% hydrogen and Hythane with 30% hydrogen in volume are used. Tests were
performed in both of full load and part load conditions. Full load tests contain engine speeds from 1500 rpm
up to 6000 rpm with step of 500 rpm. Part load tests were performed in engine speed of 2000 rpm and 3000
rpm. In each test, spark timing was set to reach the maximum indicated mean effective pressure. The results
showed that volumetric efficiency, power and torque decreased with increase of Hydrogen fraction at full
loads but thermal efficiency increased. Increase of Hydrogen Fraction in Hythane mixture cause CO and HC
decrease but NOx increases.
کلیدواژهها [English]
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