Simulation study on the effect of injection pressure on single cylinder diesel engine fuelled with biodiesel blend

Abstract

Every year, global energy demand keeps increasing by 1.2%. An increase in energy demand might cause an increase in greenhouse gases (GHG). Biodiesel is categorized as carbon neutral fuel and can substitute pure petroleum diesel fuel. Western countries are currently pushing towards carbon neutrality and pushing vehicle electrification. Meanwhile, in countries like Indonesia biodiesel can be use as alternative fuel parallel with vehicle electrification. Much research has been conducted regarding biodiesel fuel performance and emissions ranging from low to high biodiesel blend. Even though it is considered as the best substitute, there are several challenges to implement biodiesel as diesel engine fuel. Low calorific value and high viscosity are considered as main disadvantages of biodiesel. One of them is Brake Specific Fuel Consumption (BSFC). Several studies have been conducted to increase the performance of diesel engines while still the overall performance compared to pure petroleum diesel. The problem with experimental tests is time and cost consuming. This issue can be solved by using engine simulation software like GT-Suite. Diesel fuel, B10, B50, and B100 were used in this study. Experimental study was conducted using diesel fuel, B10, and B50 using Yanmar L70N6 diesel engine as baseline data for simulation study. BSFC and Brake Thermal Efficiency (BTE) data, obtained from experimental were used as main parameter in this study. Then, the engine model simulates variation of injection pressure ranging from 206-300 bar. It was found out that increasing injection pressure to 300 bar reduces overall BSFC across all biodiesel blends and increases BTE across all biodiesel blends.