Experimental Study Influence of High Fin on Naca Airfoil 0018 On Performance Of H-Type Darrieus Wind Turbine

Abstract

Energy is something that is needed in life, as technology develops the need for energy is increasing as well, while the role of New Energy Darrieus wind turbine is one of the solutions for renewable energy because it utilizes energy from wind and is converted into electrical energy, but this turbine has a low starting torque. In this study, the performance of the Darrieus wind turbine was improved by adding a fin to each blade with variations in height (0 cm, 1,5 cm, 2,5 cm, and 3,5 cm). In addition, testing was also carried out with variations in fluid flow speeds (3 m / s; 5 m / s; and 7 m / s). The subjects used in this study were H-type Darrieus wind turbines with a diameter of 40 cm and a height of 50 cm. Experiments were carried out to find out how the effect of fin addition with variations in height on the coefficient of power (Cp) and coefficient of torque (Ct) of the darrieus wind turbine. The final results showed the best performance improvement of the savonius wind turbine occurred at a variation in the fin height of 2.5 cm at a wind speed of 5 m/s. The coefficient of torque (Ct) increased by 7.64% and the coefficient of power (Cp) by 48.38% against conventional H-type darrieus wind turbines. This is because the addition of an effective fin is to reduce the tip of the vortex at the end of each blade so that the flow of fluid that flows becomes more regular and maximum.