Ducted Turbine Technology
Ducted wind turbines are not a new idea. The basic premise is illustrated in the sketch below. A duct surrounding the rotor captures more of the oncoming wind, directing it through the rotor to increase the amount of wind energy the rotor ‘sees’. While a proper duct design is key a performance increase, the additional cost is even more important in evaluating the cost/kWh of the turbine. Many attempts have been made to build a viable unit and all have failed commercially.
DTI has licensed two patent pending technologies from Clarkson University that enable an economically viable turbine, setting a new standard in small turbine output.
DTI Key Technology #1: Rotor Design **
The presence of the duct influences the velocity field that the turbine rotor sees. If this is not accounted for, as is the case with earlier commercial failures, the turbine will actually perform less efficiently than an open rotor. Our rotor design takes this into consideration and creates the proper twist of the blade.
DTI Key Technology #2: Rotor Location **
Ducted turbines have traditionally placed the rotor at the throat of the duct, the location of highest velocity. DTI has discovered that if the rotor is moved farther into the duct, the power output increases dramatically.