چكيده به لاتين
Restriction of fossil energy sources and also environmental concerns has led to a great tendency to renewable energy resources. Wind energy is one the most available and cleanest of these resources that has been exploited by human. In recent years, the tendency to use small scale wind turbines (with rated powers less than 10 kilowatts), for individual use has grown very much. Among the various configurations of Vertical Axis Wind Turbines (VAWTs), the Straight-Bladed Darrieus turbines (SB-VAWTs) have gain much more attention for individual use or in poor regions, primarily due to their relatively simple structure and aerodynamic performance. Despite numerous works on different aspects of SB-VAWTs, a straightforward design procedure is still lacking. The main objective of this research is to obtain a computational method in order to fill this gap. For this purpose, after modeling SB-VAWTs aerodynamics, the most important parameters affecting the aerodynamic performance of these turbines has been determined and the analytical model “Double Multiple Streamtube” (DMS) has been used for aerodynamic analysis of turbine. At the end using Genetic Algorithm, the efforts have been made to find the most aerodynamically optimized design for a Straight-Bladed Darrieus turbine with rated power of 7 kilowatts in rated wind speed of 12 m/s. Using the optimized values for designing the turbine shows an increase of about 14 percent in aerodynamic performance compared to the first design.
Keywords:
Straight-Bladed Darrieus turbine, Aerodynamic design, DMS model, Optimization
