KAJIAN NUMERIK PENGARUH PROFIL SUDU TERHADAP KINERJA TURBIN HYDROKINETIC DARRIEUS SEBAGAI WAVE AND CURRENT ENERGY CONVERTER

Abstract

New and Renewable Energy (EBT) resources in Indonesia are still not fully utilized,
especially from the the maritime sector. Currently, the EBT mix has only reached 11.2 percent, still
below the 2025 energy mix target of 23 percent and the potential for EBT which reaches more than 400
Gigawatts (GW) has only been utilized at 10 GW or 2.5 percent of the total reserves. (EBTKE Public
Relations, 2021). The form of wave and current energy is one of the new renewable energies from the
sea which has the potential to be used as electrical energy with very large energy reserves. In this Final
Project research, a 2D modeling simulation based on CFD (Computational Fluid Dynamics) was
carried out on the Darrieus hydrokinetic turbine as an ocean wave energy converter device.
Simulations were carried out to analyze the effect of the blade profile on the Torque Coefficient (Ct)
and Power Coefficient (Cp) values. In this study, wave data from one of the South Java Waters was
used. The highest Coefficient of Torque (Ct) and Coefficient of Power (Cp) values were obtained for
the NACA 0021 symmetrical blade profile with a variation of TSR = 0.25 and ? = 0.5, namely Ct =
0.335 and Cp = 0.167 while for the asymmetrical blade profile NACA 63-415 with a variation of TSR
= 0.25 and ? = 5 for Ct = 0.263 and Cp = 0.132