Experimental research to determine the effect of main operating parameters of rice husk gasifier on power capacity and fuel saving of diesel engine using dual fuel

Rice husk is abundant in the Mekong Delta of Vietnam, considering as renewable energy for power generation. The syngas production from the gasification of rice husk can also be supplied to the dual-fuel diesel engine, saving oil consumption. The operating conditions are key contributions to obtain the high syngas qualification and high ratio of the replaceable syngas fuel in the diesel-syngas engine. This paper presents the effect of air velocity (from 2.0 to 8.0 cm/s), bulk density (from 92.31 to 122.55 kg/m3), and moisture of rice husk (from 4.0 to 13.0 %) on the replaceable diesel oil ratio and power capacity of the dual-fuel diesel engine RV-125N, using the downdraft gasifier. The obtained results indicate that at the moisture of 4.3 % of rice husk, the bulk density of 101.86 kg/m3, and the air velocity of 6.0 cm/s, the power capacity can reach 1.41 kW and the replaceable diesel oil ratio was over 60 %. Considering the moisture of rice husk of 4.3 % (as-received), the diesel capacity can be improved and the replaceable diesel fuel was not significantly decreased.