Using diesel and blends of turmeric leaf oil to reduce emissions and improve the efficiency of variable compression ratio engines

Abstract

A growing need for renewable energy sources has resulted from research into possible replacement fuels for internal combustion engines. This research examines the effects of using turmeric leaf oil (TLO) as a biofuel in a variable compression ratio (VCR) engine with the goal of increasing efficiency and decreasing exhaust emissions. The experiments used a single-cylinder, four-stroke diesel engine that operated on different compression ratios, from 19.5:1 to 18.5:1, and under different loading situations, from 5 to 9 kg. We measured the brake thermal efficiency, volumetric efficiency, and specific fuel consumption (SFC) of diesel blends with varying amounts of TLO (B50, B60, and B70) to see how well they performed. When the engine load increases, the results show that TLO integration somewhat reduces volumetric efficiency but significantly increases brake thermal efficiency.