Design, Simulation, Manufacturing, and Testing of Savonius Wind Turbine with Overlap Ratio Variation

• Main Author: Putro Budiyanto, Haryo
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/38115
• Institution: Institut Teknologi Bandung

Consumption and electricity needs in Indonesia continue to increase by year. At the moment, energy source for generating electricity is still dominated by non renewable energy, especially fossil fuels, such as coals and petrol oils, which contribute more than 85% from the total national electricity production. Indonesia has so many renewable energy resources that can be converted to electricity, where one of them is wind energy. Wind energy potential in Indonesia is about 9.3 GW in total, but only used for 1.12 MW in national electricity production. The data shows that it is a huge challenge to increase the electricity production by using wind as energy source. The purpose of the study was making an energy conversion system using savonius wind turbine. This research required a simulation of the savonius wind turbine with some variations of overlap ratio as a main focus to obtain the best mechanical power and coefficient of performance. The numbers of overlap ratio are 0, 0.1, 0.2, 0.3. CFD-based simulation was applied on the wind turbine design. After the simulation process, the next step was manufacturing of the wind turbine system and examining the simulation result compared to the actual condition by testing of the system. Based on the simulation process, wind turbine with overlap ratio 0.3 generated the highest coefficient of performance by 0.171, and turbine with overlap ratio 0.1 produced the biggest mechanical power by 0.5 watt on 2 m/s wind velovity, and 32 watt on 8 m/s wind velocity. The testing resulted that the total efficiency is 0.29%. The effects of friction on the bearing, pulley, belt, gearbox, and also the used of generator that unsuitable with low rotation, made the number of overall efficiency was relatively small.