The use of wind power has been around for centuries, from the simple sail to the sophisticated windmills. The inconvenience of harvesting wind energy is that most of wind-farm sites are placed far away from the areas that need the power.
Wind turbines cannot be placed in crowded cities as they need a lot of space to rotate towards the wind direction. A solution would be to use vertical airfoils that can exploit the wind from any direction. But they still need to be mounted in a space of their own.
Sridhar Condoor from Saint Louis University in Missouri has invented a cylindrical wind turbine that has no central hub. Because of its form the device can be place around pre-existing features like chimney stack, cellphone mast and even tree trunks.
The device has some inlets that can harness wind energy from any direction and throughout a wide range of wind speeds. The system has few devices configured in a hollow, cylindrically shaped and connected to a ring frame. The system rotates around an axis running through the center of the ring frame. The rotation of the system drives a gear that powers a generator, being in this manner able to produce electricity. That makes the device simple to install without needing clear space.