FIELD TEST AND PERFORMANCE ANALYSIS OF VALVE-AUGMENTED SAVONIUS WIND TURBINE

• Main Author: Brahmantya Herdhani, Adhi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74886
• Institution: Institut Teknologi Bandung

The Savonius wind turbine is considered suitable for harnessing wind power at a small scale and at certain location such as urban site. This is because Savonius has several advantages, such as: omnidirectionality, low cut-in speed, and simple desing. The main weakness for Savonius wind turbine is its low power coefficient CP. In the last 4 decades, there have been plenty of studies on how to improve the Savonius turbine performance. One such method is by valve addition on the rotor’s blades. There have been several studies regarding the valve-augmented Savonius wind turbine. However, all of the studies are numerical and experimental study on the wind tunnel. For prototipe development, field test with a real wind condition is a necessity. In this research, a conventional non-valve and valve-augmented Savonius wind turbines are tested on a wind tunnel and on the field. Test on the wind tunnel show an 8.2% CPmax improvement yielded by the valve addition. A short-term wind resource assessment was conducted on the ITB’s Energy building rooftop of which measured a 14 w/m2 power density and a 1,66 m/s average wind speed. Compared to the Gamma and Lognormal distribution model, the Weibull model yield the best accuracy. On the field test, the valve-augmented Savonius wind turbine leads to a 5,3% CPmax improvement over the non-valve turbine. Despite a lower improvement percentage, valve addition on a Savonius wind turbine have been proven to be able to increase the Savonius turbine performance while at the same time maintain all it’s inherits advantages.