Abstract
In many accessible regions of Thailand, the average wind speed is generally quite low. Although Vertical Axis Wind Turbines (VAWTs) are designed for performing mechanical work acceptably at higher wind speeds, they are usually chosen to be installed for those areas where the local wind speed is low as well. Therefore, standalone VAWTs are still unable to generate mechanical power satisfactorily for best practice. This study introduces analysis of effect of wind boosters on power generation from vertical axis wind turbines (VAWTs), by utilizing Computational Fluid Dynamics (CFD) software. A wind booster is invented for incorporating with a VAWT in order to not only overcome limitations of harvesting energy with low availability at low wind speed but also enhance performances of a VAWT at higher wind speed. Specifically, a wind booster has numbers of guide vanes installed around a VAWT. All the guide vanes direct wind to impact VAWT blades at effective angles while passages between each guide vane are designed to throttle wind so as to accelerate air flow before impacting VAWT blades. From CFD case studies, guiding and throttling effects of the wind booster are able to increase angular speed of a VAWT which leads to increase in mechanical power generated from a VAWT.
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