Simulation of Vertical Axis Darrieus Turbine with Circular Chord Hydrofoil Type with C/R 0,3 and 0,35 at Water Velocity 0,9 m/s, 1,2 m/s, and 1,5 m/s

• Main Author: Surendra Damanik, Ferlin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/40641
• Institution: Institut Teknologi Bandung

Indonesia has a lot of hydro power potentials that has not been used. The potentials come from tidal streams and ocean. Ordinary turbines cannot generate electricity from these potentials because its very low head. Types of turbine that are being widely developed for this condition is the vertical axis wind turbine category (VAWT), and the type of this turbine is vertical axis Darrieus turbine that is used as a water current turbine. This final project objective is to determine the characteristics of Darrieus turbine with very low head, by applying computational fluid dynamics (CFD) simulation using Fluent software. The simulated turbine has hydrofoil type NACA 0018; rotor radius 185 mm; rotor height 200 mm; C/R 0.3 and 0.35. The duct use ratio Sin/D 0.8, ratio S/D 1.2; draft tube with widening angle (?d) 9.5o and the ratio Sd/S 1.5. The simulation results show the best performance occurred in the turbine with C/R = 0.35 and V = 0.9 m/s, the amount of power generated is 13.69 watt at 90 rpm, with corresponding Cp = 0.424. The simulations results then compared with the testing results that are obtained from the literature. Although the simulation results differ from the testing results, but by the study of this simulation, we could predict how good is the performance of a Darrieus turbine so we could find the best turbine configurations and choose the best duct configurations. With this simulation, we could reduce cost comparing to the direct testing method.