Wind power is proportional to the wind speed cubed. If we can increase the wind speed with some mechanism by utilizing the fluid dynamic nature around a structure, namely if we can capture and concentrate the wind energy locally, the output power of a wind turbine can be increased substantially. At wind energy section of Kyushu University, a new efficient wind power turbine system has been developed. This system has an diffuser shroud at the circumference of its rotor to embody the wind energy concentration. The diffuser shroud is now named "Wind lens". To apply the wind-lens structure to a larger size turbine, we have developed a compact collection-acceleration device. There are several ongoing projects in which the wind-lens turbines are involved.
[New! 2014 Nov 21] Updated summary of Wind-lens turbine:
>>click here for the report (8.0M)
・History of development of the Wind Lens
・How does it work?
・Plans for future
A little bit more detailed reading matereal:
EWEA2011 Poster (3.8M)