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Title: Wind farm blockage effects: comparison of different engineering models

Journal Article · · Journal of Physics. Conference Series
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Technical Univ. of Denmark, Roskilde (Denmark). DTU National Lab. for Wind Energy
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The work presents four engineering methods to estimate the induction zone in front of a wind turbine and account for the wind farm blockage effect. The methods comprise the vortex cylinder model, vortex dipole model, self-similar model, and wake projection model. The majority of the models presented account for yaw misalignments and ground effect. Actuator disk simulations are used to verify the individual models. The performance of each model is evaluated both in terms of precision and computational time. The induction models are coupled to wake models within the FLOw Redirection and Induction in Steady State framework to provide the full velocity field within a wind farm. Sample wind farm computations are presented, and the impact of including induction effects into wind farm performance predictions is reported. The different codes are publicly available online.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1665823
Report Number(s):
NREL/JA-5000-76855; MainId:10499; UUID:7a402978-9523-4fba-8f34-37b6f73b5062; MainAdminID:17405
Journal Information:
Journal of Physics. Conference Series, Vol. 1618; ISSN 1742-6588
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (10)

A new analytical model for wind-turbine wakes journal October 2014
Analysis of control-oriented wake modeling tools using lidar field results journal January 2018
Wind Farm Blockage and the Consequences of Neglecting Its Impact on Energy Production journal June 2018
The aerodynamics of the curled wake: a simplified model in view of flow control journal January 2019
The flow upstream of a row of aligned wind turbine rotors and its effect on power production: The flow upstream of a row of aligned wind turbine rotors and its effect on power production journal May 2016
A simple model of the wind turbine induction zone derived from numerical simulations: A simple model of the wind turbine induction zone derived from numerical simulations journal August 2017
Influence of atmospheric stability on wind-turbine wakes: A large-eddy simulation study journal March 2015
Fatigue and extreme load reduction on two‐bladed wind turbines using the flexible hub connection journal September 2019
Local blockage effect for wind turbines journal June 2015
Validation of a CFD model with a synchronized triple-lidar system in the wind turbine induction zone: Validation of a CFD model with a synchronized triple-lidar system in the wind turbine induction zone journal March 2017

Figures / Tables (10)

Table 1(p. 2)table Table 1
Figure 1(p. 3)figure Figure 1
Figure 2(p. 6)figure Figure 2
Figure 3(p. 6)figure Figure 3
Figure 4(p. 7)figure Figure 4
Figure 5(p. 7)figure Figure 5
Figure 6(p. 7)figure Figure 6
Table 2(p. 8)table Table 2
Figure 7(p. 9)figure Figure 7
Figure 8(p. 9)figure Figure 8

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Related Subjects

17 WIND ENERGY
wind farm
blockage effect
induction zone
wakes