Numerical and experimental investigation of performance and emission characteristics of hydrogen enrichment with prosopis juliflora biodiesel in CI engine using RSM and ANN optimization

Abstract

IC engines need renewable fuel due to environmental degradation and fossil fuel depletion. Biodiesel was a popular alternative fuel. However, hydrogen has zero emissions and a higher auto ignition temperature. This study examines diesel engine operation with hydrogen-enriched juliflora biodiesel/diesel blend (B20). The 4-Stroke, direct injection diesel engine (KIRLOSKAR-AV1) produces 5.2 kW at 1500rpm. A B20 compound was injected into the combustion cylinder via the intake manifold during testing. Hydrogen was supplied through the intake manifold. Diesel (D0), B20, and B20 with hydrogen are tested on 6 lpm, 9 lpm, and 12 lpm respectively. Increase in hydrogen concentration with B20 blend will increased brake thermal efficiency. The mixture B20 at a flow rate of 12 L per minute increased the BTE by 27.51%, which is a 4.88% improvement compared to the original B20. Similarly, this concentration exhibit an 18.75% reduced Brake Specific Fuel Consumption (BSFC) compared to the B20 combination. CO and HC emissions decreases and increased in NOx emissions while increasing H2 flow. Further, to develop the RSM and ANN predicted model for optimization of CI engine characteristics responses. The RSM model analyzed the lower mean square error (MSE) and actual relative error (ARE) for the engine responses compared to the ANN model.