The Use of Coastal Wind for Electricity Generation Through Savonius Vertical Axis Wind Turbine at Remote Islands in East Java Offshore

Abstract

Although Wind Turbine Generator has common use in several countries, in Indonesia, this thing is rarely used, even though Indonesia's geographic itself stored a lot of potential in developing such an energy source. Indonesia is an archipelagic nation with five main islands and thousands of small islands. Its condition makes coastal wind very important and a potential energy source that hasn't yet been developed. Here, we develop a limited-capacity electric generator to be used in remote small islands in East Java Offshore that are not yet connected to a national power grid. Because of the inconsistency of the direction of a coastal wind, we chose the Vertical Axis Wind Turbine to develop. This research studies the connection between wind blade curve angles and wind turbine efficiency. We used three different wind blade types and measured the rotation speed according to the respective wind velocity. Our experiment shows that the bigger the curve angle resulted in a higher rotational speed of the wind turbine. For example, with the wind velocity at 6 m/s, the results are as with 0°(flat blade) the average rotation speed is 175.5 rpm, 45°the average rotation speed is 212.55 rpm, and 90°the average rotation speed is 266.25 rpm.