Optimization of diesel engine parameters using Taguchi method and design of evolution
The objective of this work is to optimize the control parameters of the direct injection (DI) single cylinder diesel engine with respect to NOx (Oxides of Nitrogen) and fuel emissions through experimental investigations and Taguchi method. A single cylinder 5.2 kW diesel engine was selected for this experiment. Five parameters such as clearance volume, valve opening pressure, nozzle-hole diameter, static injection timing and load torque were varied at four levels and the responses such as NOx emissions and fuel economy were recorded. The optimum values of the response variables could be predicted using S/N ratio and optimum combination of control parameters were specified. Results of confirmation tests showed good agreement with predicted results. Thus the relationship between the diesel engine operating parameters with NOx and b.s.f.c (brake specific fuel consumption) could be understood using Taguchi method of experimental design.
Application of Taguchi Approach to Optimize Performance and Emission Parameters of Single Cylinder Direct Injection Diesel Engine Using Karanja Methyl Ester
The present study deals with the use of Taguchi approach to optimize the engine performance and emission characteristics of single cylinder DI engine which operates with Karanja oil methyl ester called KOME of 10% blend, 20% blend, 30% blend and 40% blend. As per the DOE, Taguchi L16 orthogonal array was considered. The signal-to-noise (S/N) ratio and the analysis of variance (ANOVA) were exploited to establish the optimal factor levels and to analyze the effect of the significant conditions on performance and emission characteristics. Among all the key engine operating parameters, 5 critical factors were selected which are namely load (L), the percentage of KOME, compression ratio (CR), injection pressure (IP) and injection timing (IT). The confirmative experiment was conducted and tested at the confidence level. Analysis of brake thermal efficiency (BTHE), HC and NOx presented and discussed. The results of this study revealed that BTHE was highly influenced by the percentage of the blend; NOx was influenced by the CR.a
Physical Principles of Wind Energy Conversion
The primary component of a wind turbine is the energy converter which transforms the kinetic energy contained in the moving air, into mechanical energy. For the initial discussions of principles, the exact nature of the energy converter is irrelevant. The extraction of mechanical energy from a stream of moving air with the help of a diskshaped, rotating wind energy converter follows its own basic rules.