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) |
|---|---|
| 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