Effects of hydrogen enrichment and injection location on in-cylinder flow characteristics, performance and emissions of gaseous LPG engine

Experimental investigations are carried out to validate the adequate fueling system and identify the hydrogen enrichment effect on LPG gaseous engine performances and emissions. Experimental measurements were achieved by blending a percentage of hydrogen (0%, 5%, 10%, 15% and 20% in volume) with LPG and supplied to the engine. As results, the brake power was increased using 20% hydrogen addition ratio by 17.5% compared to standard pure LPG operation. Brake thermal efficiency was improved by 4.5% at maximum engine speed. A decrease of carbon dioxide emissions was attained by 15.1% at maximum engine torque (2500 rpm). There was considerable reduction in hydrocarbon levels.