Experimental Study of the Influence Wave Period on the Performance Darrieus Turbine with Modification of the Blade Angle

Abstract

Indonesia has a long coastline that has the potential for renewable energy sources from waves to be used as an energy source for power generation. To take advantage of this potential, research has been carried out by testing the Darrieus-type vertical axis turbine model at the Indonesian Hydrodynamics Laboratory. The weakness of the wave turbine is that it cannot rotate due to the wave force due to the position of the turbine rotor which is perpendicular to the turbine axis. By changing the angle of the turbine blade in an inclined position, it is expected to produce optimal efficiency to produce rotor rotation. This paper describes the testing of a turbine model with an angled turbine blade that produces the best efficiency and rotation due to wave forces and ocean currents. The test is carried out by varying the angle of the turbine blade tilt (45°, 60°, and 75°). Each is given a variation in height and wave period but still, maintains the turbine rotor area. Furthermore, the torque, efficiency, rotation, and resulting power are measured. wave height of 0.15 meters with variations in wave periods ranging from 1.2 - 2.5 seconds. The test results show that a turbine with a rotor angle of 60° produces the best performance.