31/01/23 15:54:46
@wind-energy
Characteristics of the wind
- Turbulence caused by dissipation of wind’s ke into te via creation and destruction of smaller eddies.
- TI = \sigma/U where U is the mean wind speed.
- Wind speed variation is considered normal.
- Average TI is about 10-20%.
- PDF gives us the pprobability of the wind speed taking on certain values.
- PDF is step up from turbulence intensity. P of u normally distbuted is pretty crude.
- If you work out average velocity you can work out average power.
- k = 2 implies a Releigh? distribution.
- Uses a gamma function?
- Lot of whiteboard work on Weibull distribution. Good for back of envelope calculation for propspecting a site.
- covariance scale up variablity of one variable with that of another.