Rooftop Design / September 9, 2018 / Juan M. Tate
Some rooftop wind turbines will work more favorably when on the edge of a rooftop such as one that is long and flat (sort of like being on the edge of a cliff with an updraft). Others however on roofs with more angle or pitch will work more favorably in a higher location. Finding the right spot on the rooftop can add 5 to 40-percent more efficiency in electricity generation. One of the most obvious points is for home and business owners in rather windless areas to not buy rooftop wind turbines but rather opt for other alternative energy resources. Wind maps may help some determine if there is enough regional wind to justify the purchase of building of a rooftop wind turbine. Buying an inexpensive anemometer and tracking results is also helpful before making a decision.
A less obvious issue when deciding on putting up a rooftop wind generator may be any obstructions current or future that could block the full wind from getting to the generator. Trees other buildings hillsides or even large vehicles can deflect the wind away from the turbine. If the rooftop is inside a city filled with buildings the wind path can become quite tricky as it may bounce from one structure to the next causing turbulence and an inconsistent flow.
As Ive stated in other sections of this website celebrities like Jay Leno and Ed Begley Jr. have decided to place rooftop wind turbines on their homes and garages. In both cases vertical axis magnetic wind turbines were chosen to fill the bill. Some homeowners state that vertical axis wind turbines in general are a little quieter than their horizontal axis counterparts. Rooftop wind turbines generally come with a kilowatt (kW) rating such as 5 kW 10 kW or 20 kW that reflects how much electricity one can expect it to generate for ones home or business. It is important to either have a large enough rooftop wind generator or several that add up to enough in order to provide the needed power.