Exploration of Engine Performance on Thermal Barrier Coating Powered by Biodiesel with Al2o3 Nanoadditive.

Abstract

This present examination aims for increasing engine performance by using calibnum inhoblum methyl ester 20% and 80% diesel @ 25 ppm [B20 + 25 ppm of Al₂O₃] nanoparticle additive for the low heat rejection (LHR) engine. The piston crown coating involved a two-layer insulation process. Initially, a 50 µm thick bond coat of Ni-Cr-Al-Y was applied, followed by a topcoat using two different pistons, namely 2% Nd + YSZ (5% yttrium + 2% neodymium oxide + 93% zirconium oxide) and 2% Gd + YSZ (5% yttrium + 2% gadolinium oxide + 93% zirconium oxide), with a thickness of 250 µm. This coating was applied using the plasma spray coating method. In comparison to diesel, the engine performance with B20 + 25 ppm Al₂O₃ resulted in enhancement in brake thermal efficiency (BTE) of 9.7% and a diminish in brake specific fuel consumption (BSFC) of 23.07%. The CO, HC and smoke values were reduced by 24.6%, 38.25% and 11.3%, respectively, compared with diesel fuel. The NOx and EGT were increased by 30.45% and 24.2%, respectively, with full load at 1500 rpm.