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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
COMPUTATIONAL FLUID DYNAMICS FOR WIND FARM PERFORMANCE ASSESSMENT IN COMPLEX TERRAIN
Submission Author:
William C. Radünz , SP , Brazil
Co-Authors:
William C. Radünz, yoshiaki sakagami, REINALDO HAAS, Adriane Prisco Petry, Júlio Passos, Eduardo Dias
Presenter: William C. Radünz
doi://10.26678/ABCM.ENCIT2020.CIT20-0520
Abstract
Atmospheric stability influences local flow dynamics in complex terrains and may therefore impact turbine production across the wind farm area. Field measurements and wind farm production data gathered at the sited revealed a systematic overperformance of the back row during stable conditions. This pattern is inverted during unstable conditions and the same back rows underperform in comparison with the front rows. Here we employ a novel framework for the simulation of unsteady and stably-stratified wind flows in complex terrain areas that is based on the coupling of a microscale computational fluid dynamics (CFD) model and a mesoscale numerical weather prediction (NWP) model is employed to enhance our understanding of the flow patterns in the wind farm area. Simulations are not intended to reproduce the wind conditions of the site in detail, but rather to perform a proof of concept: that the inversion in performance observed is explainable by the wind patterns and their interplay with atmospheric stability. Indeed, wind flow patterns are largely different between unstable and stable conditions and the numerical simulations are successful in emulating how the wind farm operates.
Keywords
atmospheric stability, micro-siting, Complex terrain, wind farm performance
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