Improving the suitability of triple blend biodiesel in a low heat rejection diesel engine with the addition of nanoparticle through performance and emission characteristics analysis

Abstract

The primary aim of this research is to efficiently utilize biodiesel and nanoparticles in thermal barrier-coated (TBC) engines. In view of this, a novel neem seed oil (NSO) and linseed oil (LSO) have been chosen for this work, and they are changed into neem seed oil methyl ester (NME) and linseed oil methyl ester (LME) through transesterification process. The blend B20 (10% NME + 10% LME + 80% diesel) and B20 with 50 ppm CeO2 (B20C50) is prepared and used for that analysis in both conventional and coated engines. For the coated engine, the combustion chamber parts are coated with partially stabilized zirconia (PSZ) using the atmospheric plasma spray coating method. Initially, neat diesel, B20, and B20C50 are tested in a conventional engine, and later, B20C50 is tested in a TBC engine. Load tests are conducted on a direct injection (DI) diesel engine by changing the load from 0 to 100% to assess performance and emission characteristics. From the experimental work, it was noted that B20C50 in the TBC engine showed 3.3% higher brake thermal efficiency (BTE) and 26.92% lower brake specific fuel consumption (BSFC) than diesel fuel operated in a conventional engine. When associated with diesel, the emissions of carbon monoxide (CO) and hydrocarbons (HC) are lower by 30.77% and 24.32%, respectively. The emission of oxides of nitrogen (NOx) in the TBC engine is recorded as similar to diesel fuel.