Analysis of Air Foils and Design of Blades for a Low-Speed 250W Vertical Axis Wind Turbine Suitable for Coastal Areas of Bangladesh

Abstract

Harnessing wind energy across all over the globe increasing due to raw energy availability and uses of a higher grade of optimized technology. Mostly European countries are adopted this energy expansion over other regions because of the huge availability of wind in these areas. The potential of wind energy in Bangladesh is not tremendously good but has some good prospect if modern technology and greater optimization can take place. Presently the coastal regions, as well as Cox's Bazar, Chittagong, Teknaf, Patenga, Mongla, and Kutubdia, are a most suitable point to harnessing or working on wind energy. Although the velocity of wind in these regions is not perfect for harnessing energy from a big size wind turbine rather it is quite capable to generate electricity from small size turbine in an efficient way. Vertical axis wind turbine (VAWT) is perfectly appropriate for extracting the maximum power from wind in such these low wind speed area. NACA foil is mainly prioritized to build this type small sized VAWT system because of the low maintained mechanism. The small-sized VAWT system needs more analyzed wind data to work in an optimized condition. The positions and efficiency of the turbine system are highly depend on the blade lift and drag coefficient because of random wind flow directions. Counting all these points the main objective is to examine the wind data available in these areas and design a vertical axis wind turbine (VAWT) suitable for small sized electricity generation system in an efficient way by optimizing turbine blades and its foil mechanism.