Abstract
A simple analytic correction is derived for the maximum efficiency of an ideal wind turbine rotor, the Betz-Joukowsky limit. The analytic correction accounts for the effect that the non-uniform atmospheric boundary layer velocity distribution has on the Betz-Joukowsky derivation. The maximum power coefficient predicted by using the atmospheric boundary layer velocity profile is slightly higher than that predicted by using a uniform velocity distribution. The application of the correction to a 100 m rotor diameter at 80 m hub height in a neutrally stratified boundary layer flow predicts a maximum power increase of 1-2%, depending on the approach terrain.
Original language | English (US) |
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Pages (from-to) | 279-282 |
Number of pages | 4 |
Journal | Wind Energy |
Volume | 16 |
Issue number | 2 |
DOIs | |
State | Published - Mar 2013 |
Externally published | Yes |
Keywords
- Betz limit
- atmospheric boundary layer
- velocity distribution effects
- wind energy
- wind turbine performance
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment