DESIGN OF A COST-EFFECTIVE SMALL WIND TURBINE FOR LOW WINDS
Abstract: Small wind turbines (SWTs) available in the country today are expensive imported units that are generally designed for higher average wind speeds, not prevalent in India. They are not popular due to their low efficiency and consequent long payback period. The motivation is therefore to design and develop a cost-effective, efficient, small wind turbine for direct stand-alone application in urban, coastal and rural areas.The airfoil sections have to be optimized for the SWT for the characteristic low wind speed and Reynolds number (Re), typically below 500,000. The airfoil sections conforming to this requirement namely the Aquila, Eppler,Wortman, Selig, and the SG series were studied resulting in the choice of the SG6043 airfoil section with high lift to drag ratios (CL/CD) and soft stall.
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