Optimization of performance and emission characteristics of 7% YSZ coated diesel engine with biodiesel using Taguchi method

Abstract

The primary analysis focuses on the impact of thermal barrier coated pistons on the efficiency and emission characteristics of diesel engines (CI). The test engine piston surface was coated with a 0.25 mm thick 7% YSZ top coat and a 0.05 mm thick Ni-Cr-Al-Y base coat using the plasma spray method. The tests will be carried out in a 4-stroke, 1-cylinder CI baseline engine utilise test fuels (Diesel, Mahua, and Jatropha) in both coated and uncoated tests. According to the analysis, a covered engine's BTE significantly improved by 2.7% and with a coated piston, the BSFC was lowered by 3.1%. In ceramic insulated engines, pollutants like HC and CO went lower by 6.9% and 6.5% respectively the NOx discharge was elevated by 11.9% validated to the base-line engine. The Taguchi strategy and response surface methodology were used to determine the optimal factor levels in terms of effectiveness and emission variables.