Dendy Satrio, Dave Johannes Putra, Wimala Lalitya Dhanistha, I Ketut Aria Pria Utama, Teguh Putranto, Noorlaila Hayati, Maktum Muharja, Madi Madi
Energy supply is a critical variable affecting modern life. Indonesia has many renewable energy sources. One of them is ocean currents. Savonius turbines, which are effective in low-speed currents, have been widely studied in their vertical form, but there has been little progress on cross-flow Savonius turbines. In this study, the turbine performance was investigated in by observing the behaviour caused by the influence of depth immersion, given that the surface of the submersible medium and the surface of the bottom can influence the turbulence. Therefore, the cross-flow Savonius turbine was placed in three different depth conditions: 33%; 50% and 66% of water depth. An analysis was done with Computational Fluid Dynamics (CFD) software. The turbine’s rotation direction was also set in two conditions (clockwise and counterclockwise). All these scenarios resulted in the turbine with 66% and the clockwise condition showed the highest results with a Coefficient of power (Cp) value of 0.249. The vortices flow pattern created by the clockwise configuration tended downward, in contrast to the counterclockwise which pointed upward. The cross-flow Savonius turbine worked optimally in a low Tip Speed Ratio (TSR) where its performance was greatly affected by torque. © Faculty of Maritime Studies Rijeka, 2024.
Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia; Institut Teknologi Sumatera, South Lampung, 35365, Indonesia