A simple addition to the standard wind turbine setup called a wind lens can double, or even triple, the power output.

Professor Prof. Yuji Ohya of the Kyushu University research institute for applied mechanics (RIAM) has been working with a team to improve the efficiency of wind turbines. Combining an inlet shroud, a diffuser, and a brim into a wind lens, power output has been improved by a factor of 2 to 5 times in several experiments. Turbine noise is also decreased.

Here’s more on the matter.

Thanks Greg!