Diffuser-Augmented Wind Turbine

A diffuser-augmented wind turbine, or DAWT, is a wind turbine fitted with a cone-shaped diffuser around its rotor to increase how efficiently it converts wind power into electricity. Rather than mounting the rotor blades vertically atop an open tower the way a conventional turbine does, a DAWT places its blades inside the diffuser structure itself; the cone-shaped diffuser accelerates the airflow passing through the turbine, letting it generate more power than a bare turbine of the same rotor diameter would produce at the same wind speed.