Analisis Unjuk Kerja Four Stroke Diesel Engine terhadap Penambahan Hidrogen pada Intake Manifold Menggunakan Bahan Bakar Biodiesel B40 Minyak Jarak

Abstract

Abstrak- Biodiesel as a renewable fuel has low thermal efficiency and low calorific value. To overcome this, hydrogen needs to be added because it has a high calorific value and can accelerate its combustion process. This study was conducted to analyze the effect of adding hydrogen in the intake manifold to the four-stroke diesel engine performance using B40 biodiesel from castor oil. The experimental method was conducted on a Jiangdong ZH1115N engine with various speeds of 1000 rpm, 1200 rpm, and 1400 rpm, loads of 2000 Watts, 3000 Watts, and 4000 Watts, and hydrogen flow rates of 2.5 l/m; 5 l/m; 7.5 l/m; 10 l/m. The parameters tested included power, torque, BMEP, and BSFC. The characteristic test result showed a density of 920 kg/m³, viscosity of 12.88 cSt, flash point of 92°C, and cetane number >56.4. It also indicated that increasing of hydrogen flow reduced BSFC and improved engine power, torque, and BMEP. The engine fuel map showed that a flow rate of 10 l/m yields the most optimum fuel efficiency under all test conditions. So B40 biodiesel combined with hydrogen can enhance fuel efficiency and engine performance, thereby holding potential as an alternative fuel solution supporting sustainable energy transition

Keywords: Hydrogen, Intake Manifold, Diesel Engine, Biodiesel B40, Castor Oil