Abstract
A method is presented to adapt existing models of wind farms to very large ones that may affect the whole planetary boundary layer. An internal boundary layer is considered that starts developing at the leading edge of the farm until it reaches, sufficiently far downstream, the top of the planetary boundary layer, and a new equilibrium region is reached. The wind farm is simulated by an artificial roughness that is function of the turbine spacing, drag and height. From this model the flow conditions are calculated at a certain reference height and then are used as boundary conditions for a numerical code used to model a wind farm. Three-dimensional effects are considered by applying appropriate conditions at the sides of the farm. Calculations are carried out to estimate the energy production in large wind farms, and it is found that additional losses due to modification of the planetary boundary layer may be of importance for wind farms of size larger than about 100 km. (au)
Crespo, A;
Gomez-Elvira, R;
[1]
Frandsen, S;
Larsen, S E
[2]
- Univ. Politecnica de Madrid, Mecanica de Fluidos, E.T.S.I. Industriales, Madrid (Spain)
- Risoe National Lab., Roskilde (Denmark)
Citation Formats
Crespo, A, Gomez-Elvira, R, Frandsen, S, and Larsen, S E.
Modelization of a large wind farm, considering the modification of the atmospheric boundary layer.
Denmark: N. p.,
1999.
Web.
Crespo, A, Gomez-Elvira, R, Frandsen, S, & Larsen, S E.
Modelization of a large wind farm, considering the modification of the atmospheric boundary layer.
Denmark.
Crespo, A, Gomez-Elvira, R, Frandsen, S, and Larsen, S E.
1999.
"Modelization of a large wind farm, considering the modification of the atmospheric boundary layer."
Denmark.
@misc{etde_679620,
title = {Modelization of a large wind farm, considering the modification of the atmospheric boundary layer}
author = {Crespo, A, Gomez-Elvira, R, Frandsen, S, and Larsen, S E}
abstractNote = {A method is presented to adapt existing models of wind farms to very large ones that may affect the whole planetary boundary layer. An internal boundary layer is considered that starts developing at the leading edge of the farm until it reaches, sufficiently far downstream, the top of the planetary boundary layer, and a new equilibrium region is reached. The wind farm is simulated by an artificial roughness that is function of the turbine spacing, drag and height. From this model the flow conditions are calculated at a certain reference height and then are used as boundary conditions for a numerical code used to model a wind farm. Three-dimensional effects are considered by applying appropriate conditions at the sides of the farm. Calculations are carried out to estimate the energy production in large wind farms, and it is found that additional losses due to modification of the planetary boundary layer may be of importance for wind farms of size larger than about 100 km. (au)}
place = {Denmark}
year = {1999}
month = {Mar}
}
title = {Modelization of a large wind farm, considering the modification of the atmospheric boundary layer}
author = {Crespo, A, Gomez-Elvira, R, Frandsen, S, and Larsen, S E}
abstractNote = {A method is presented to adapt existing models of wind farms to very large ones that may affect the whole planetary boundary layer. An internal boundary layer is considered that starts developing at the leading edge of the farm until it reaches, sufficiently far downstream, the top of the planetary boundary layer, and a new equilibrium region is reached. The wind farm is simulated by an artificial roughness that is function of the turbine spacing, drag and height. From this model the flow conditions are calculated at a certain reference height and then are used as boundary conditions for a numerical code used to model a wind farm. Three-dimensional effects are considered by applying appropriate conditions at the sides of the farm. Calculations are carried out to estimate the energy production in large wind farms, and it is found that additional losses due to modification of the planetary boundary layer may be of importance for wind farms of size larger than about 100 km. (au)}
place = {Denmark}
year = {1999}
month = {Mar}
}