Numerical study of savonius wind turbines performance at Demak coastal area, Indonesia: a comparative study of savonius wind turbines without fin and with fin

Abstract

Abstract The coastline of Demak city shows an increase in the need for electrical energy every year, in line with an increase in pond production. Currently, electricity needs are supplied from diesel generators. However, the use of diesel generators as electricity generators causes pond production costs to increase. On the other hand, the coastal location of Demak has wind potential, which can be used as a power plant. In this study, a numerical study was carried out using the savonius wind turbine as a power plant in the coastal area of Demak city. This research’s initial stage was to collect data on wind characteristics during the day and night conditions. Wind speed data are then used as input parameters in the numerical simulation using the ANSYS R.15 software. This study compares simulations between Savonius wind turbines without using fins and using fins for placement on the coast of Demak. The simulation results show that the wind speed on the coast of Demak ranges from 2 to 3.5 m / s. In these wind conditions, the savonius wind turbine with one fin has a power coefficient (Cp) better than without the fin. The relationship between wind speed and the electric power produced has been simulated and discussed in depth in this paper.