Wind turbine blades, wind turbines, and wind farms having increased power output
| DWPI Title: Turbine blade for wind turbine used in wind farm, in which tangential induction factor, blade geometry parameter, normalized chord and blade twist are calculated by predetermined expression |
| Abstract: A wind turbine blade having a geometry that decreases the distance downstream at which freestream momentum is recovered is disclosed. The blade design increases the loading on the inboard portion of the blade and unloads the tip portion relative to a conventional blade designed to maximize power coefficient. A wind farm having a reduced inter-turbine distance and including one or more wind turbines having the new blade designs is also disclosed. |
| Use: Turbine blade for wind turbine used in wind farm (all claimed). |
| Advantage: The wind turbine blade for a wind turbine having reduced wake is arranged in a wind farm operating arrangement for improved efficiency, performance and reliability. The blade geometry is that wind turbines using the blade geometry are more closely spaced in a wind farm due to reduced array losses, thus increasing the energy extracted from the wind on a given area of land. The wind turbine blade reduces the length of the wake following turbine blade without a significant loss of rotor efficiency. The blades are retrofit to existing wind farms to reduce the wake effect in the array and increase annual energy production. The closer spacing of wind turbines with reduced array losses increasing the energy extracted from the wind on a given area of land. |
| Novelty: The turbine blade (300) has an inboard region (312) and an outboard region (314). The inboard region has an induction factor of between ¾ and ½ at a tip speed ratio of 9. A tangential induction factor, a blade geometry parameter, a normalized chord and a blade twist are calculated by a predetermined expression. A base (311) is provided at a first end of the inboard region. A tip (313) is provided at a first end of the outboard region. A length is extended from the base at the first end of the inboard region to the tip at the first end of the outboard region. |
| Filed: 12/22/2015 |
| Application Number: US14979080A |
| Tech ID: SD 13179.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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