Dr. Mahesh P. Joshi
MIT Academy of Engineering, India
Title: Combined effects of thermal barrier coating and blending with nanoparticles on usability of algae biofuel in diesel engines
Biography
Biography: Dr. Mahesh P. Joshi
Abstract
The present work investigates the combined effects of thermal barrier coating (250μm and 500μm) and higher CR (18, 19, and 20), on the performance, combustion and emissions of a DI diesel engine using diesel and BD20ZnO200. Increasing CR with thermal barrier coating enhances in-cylinder pressure, temperature and density of air-fuel charge, which improved the spray characteristics and burning of blend fuel. Also, the observed improvements occurred due to the catalytic effect, high surface-to-volume ratio of nanoparticles, and micro-explosion of water particles in the fuel. Maximum brake thermal efficiency of 29.2% is obtained at minimum BSFC of 0.22 for BD20ZnO200 at higher compression ratio (20) with thermal barrier coating (500μm). For the all test fuels, at higher CR with thermal barrier coating leads to decrement in the HC (5.45%), CO (12.6%) emissions while increment in the NOx emissions (8%). In addition, the results of the modification of the engine with thermal barrier coating process at higher compression ratio are better than the uncoated one in terms of increasing peak pressure (7%), heat release rate (6.8%), and decreasing ignition delay (11.36%) for BD20ZnO200. The overall mean square error, mean absolute percentage error, and regression coefficient obtained with the model were 0.011%, 4.80%, and 0.9608, respectively. The experimental and artificial neural network results revealed that adding metal oxide nanoparticles (200 ppm of ZnO) as a fuel additive to a small volume (BD20) of the algae biofuel blend, at higher CR (≥18) with thermal barrier coating (500μm) improved the engine characteristics. The resultant fuel can be employed as a moderate and renewable substitute for conventional fuels.