TY - JOUR
T1 - Exploring the benefits of vertically staggered wind farms
T2 - Understanding the power generation mechanisms of turbines operating at different scales
AU - Chatterjee, Tanmoy
AU - Peet, Yulia
N1 - Funding Information:
The authors T. Chatterjee and Y. Peet would like to gratefully acknowledge the support of NSF-CBET 13358568 grant and the computing hours of XSEDE Comet cluster as well as Penguin-on-Demand (POD) cluster made available by Arizona State University for the present work. T.C. and Y.P. also thank the anonymous reviewers whose comments have helped to significantly improve the manuscript. T.C. and Y.P. are not aware of any potential conflict of interest in this research.
Publisher Copyright:
© 2018 John Wiley & Sons, Ltd.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - Wind farms are known to modulate large scale structures in and around the wake regions of the turbines. The potential benefits of placing small hub height, small rotor turbines in between the large turbines in a wind farm to take advantage of such modulated large-scale eddies are explored using large eddy simulation (LES). The study has been carried out in an infinite wind farm framework invoking an asymptotic limit, and the wind turbines are modeled using an actuator line model. The vertically staggered wind turbine arrangements that are studied in the present work consist of rows of large wind turbines, with rows of smaller wind turbines (ie, smaller rotor size and shorter hub height) placed in between the rows of large turbines. The influence of the hub height of the small turbines, in particular, how it affects the interactions between the large and small turbines and consequently their power, along with the multiscale dynamics involved, has been assessed in the current study. It was found that, in the multiscale layouts, the small turbines at lower hub heights operate more efficiently than their homogeneous single-scale counterparts. In contrast, the small turbines with higher hub heights incur a loss of power compared with the corresponding single-scale arrangements.
AB - Wind farms are known to modulate large scale structures in and around the wake regions of the turbines. The potential benefits of placing small hub height, small rotor turbines in between the large turbines in a wind farm to take advantage of such modulated large-scale eddies are explored using large eddy simulation (LES). The study has been carried out in an infinite wind farm framework invoking an asymptotic limit, and the wind turbines are modeled using an actuator line model. The vertically staggered wind turbine arrangements that are studied in the present work consist of rows of large wind turbines, with rows of smaller wind turbines (ie, smaller rotor size and shorter hub height) placed in between the rows of large turbines. The influence of the hub height of the small turbines, in particular, how it affects the interactions between the large and small turbines and consequently their power, along with the multiscale dynamics involved, has been assessed in the current study. It was found that, in the multiscale layouts, the small turbines at lower hub heights operate more efficiently than their homogeneous single-scale counterparts. In contrast, the small turbines with higher hub heights incur a loss of power compared with the corresponding single-scale arrangements.
KW - infinite wind farms
KW - large eddy simulations
KW - vertically staggered
KW - wind power
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U2 - 10.1002/we.2284
DO - 10.1002/we.2284
M3 - Article
AN - SCOPUS:85055484423
SN - 1095-4244
VL - 22
SP - 283
EP - 301
JO - Wind Energy
JF - Wind Energy
IS - 2
ER -