Comparative experimental analysis on dual fuel with biodiesel-acetylene in reactivity controlled compression ignition engine

Abstract

ABSTRACT In the latest Compression Ignition (CI) engines, a gaseous fuel plays a significant role because they have the advantage of a low knock-creating tendency and lower carbon emissions. In B20 Mahua Oil Methyl Ester (MOME)-acetylene dual-fuel Reactivity Controlled Compression Ignition (RCCI) engines, an effort has been made to use gaseous fuel acetylene as a Low Reactivity Fuel (LRF). RCCI engines are well known for their low particulate matter and Nitrogen Oxides (NOx). In the current study, all the aforementioned technologies are concurrently used to attain better performance, emission and combustion characteristics. The test engine is properly modified to allow acetylene to be injected at an angle of 60° to stimulate better turbulence intake air at different flow rates, from 1 to 5 litres per minute (LPM). The result shows an increase in acetylene mass flow rates, increases the Brake Thermal Efficiency (BTE) for B20 MOME. A maximum BTE of 32.6% is achieved at the RCCI B20 MOME-acetylene operation with acetylene flow rate of 4 LPM, which is marginally lower with Conventional Diesel Engine (CDE) operation. In B20 MOME- 4 LPM Acetylene RCCI operation, the NOx emission, the smoke density, Hydro Carbon (HC) and Carbon Monoxide (CO) are reduced by 11.8%, 10.4%, 5.3% and 14.3%, respectively compared to B20 MOME in CDE operation.