Performance of Small Diesel Engine with Pertadex and Biodiesel Mixed Fuel from Kemiri Seeds

Abstract

The decline in fuel oil production has led to the development of alternative fuels that are renewable and more environmentally friendly. An alternative fuel that can be developed is biodiesel. In this study aims to develop alternative biodiesel fuels as a substitute for fossil oil fuels that are feasible applied to diesel engines. This study conducted a diesel engine performance test using mixed fuel from pertadex and candlenut biodiesel with a variation of biodiesel mixture B10, B20, and B30. The diesel engine used is a single cylinder MDX-170F air-cooled 211 cc. The diesel engine is connected to the ST-3 Generator 1 phase 220 Volt 1500 rpm which is given a load in the form of a lamp 4000 W. From the test results using a mixture of biodiesel, the effective power and torque produced by the engine decreases compared to using pure pertadex. Among the three variations of the biodiesel mixture, the best effective power produced by B10 fuel is 1537 Watt and the best torque produced by B10 fuel is 5,84 Nm. Specific fuel consumption in all biodiesel blends is increased compared to pure pertadex. Among the three variations of the biodiesel mixture, the average best specific fuel consumption produced by B30 fuel is 236,24 g/kWh. The thermal efficiency in all biodiesel blends is increased compared to pure pertadex in B20 and B30 blends. Among the three variations of the biodiesel mixture, the best thermal efficiency produced by B20 fuel is 45,97 %. The opacity of the engine exhaust gas produced in all biodiesel mixes is getting better compared to using pure pertadex. The best opacity of the engine exhaust gas produced in the use of B30 fuel is 2,3% HSU.