Combustion and performance of DI diesel engines using biodiesel of kemiri sunan (Reutealis Trisperma Airy Shaw) as a alternative fuels

Petroleum reserves as a fuel energy source in Indonesia are expected to be exhausted in 23 years if there is no alternative of fuels. Along with the government's program of energy security, it encourages researchers to look for potential alternative fuels sources instead of fossil fuels. One of the renewable energy that is currently heavily studied is biodiesel. In this paper describes one of the biodiesel that is kemiri sunan (Reutealis Trisperma Airy Shaw). Kemiri sunan is a conservation plant that grows in the ecosystem argo area with high oil content. Kemiri sunan biodiesel test was conducted to find out the combustion result and its performance. The tests were conducted on direct injection diesel engines with mixed fuel compositions between biodiesel and diesel fuel produced by Pertamina (B15 and B20). Then kemiri sunan biodiesel test results will be compared with diesel fuel produced by Pertamina itself. Parameters taken include pressure, heat release, ignition delay, power, torque, break mean effective pressure, specific of fuel consumption, and thermal efficiency. The results show that kemiri sunan biodiesel has potential as a alternative fuels.