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Impact of incoming turbulence intensity and turbine spacing on output power density: A study with two 5MW offshore wind turbines

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  • Liu, Songyue
  • Li, Qiusheng
  • Lu, Bin
  • He, Junyi

Abstract

Turbulence intensity in offshore environments has significant effects on the performance of offshore wind turbines. To maximize output power of offshore wind turbines within a limited space, i.e., achieving maximum output power density, it is essential to investigate the influences of incoming turbulence intensity and turbine spacing on output power density. The Large Eddy Simulation coupled Actuator Line Method (LES-ALM) is used in this study to simulate two utility-scale NREL-5 MW wind turbines in different turbulent environments and turbine spacings. The optimal incoming turbulence intensity and turbine spacing are identified using an active learning method. The determined optimal parameters act as a benchmark for the impact analysis. The findings indicate that the increase of turbine spacing initially results in a considerable rise in the output power density of the two NREL-5 MW wind turbines, followed by a slight downward trend across various turbulent environments. The increase of the incoming turbulence leads to a steady rise of the output power density when the turbine spacing is less than 5.1D (D is the rotor diameter), while a rise followed by a decrease in the output power density is observed for the turbine spacing exceeding 5.1D. Notably, when the turbine spacing is 5.9D and the reference value of turbulence intensity is 15.2%, the output power density reaches its global maximum.

Suggested Citation

  • Liu, Songyue & Li, Qiusheng & Lu, Bin & He, Junyi, 2024. "Impact of incoming turbulence intensity and turbine spacing on output power density: A study with two 5MW offshore wind turbines," Applied Energy, Elsevier, vol. 371(C).
    • Handle: RePEc:eee:appene:v:371:y:2024:i:c:s0306261924010316
    DOI: 10.1016/j.apenergy.2024.123648
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    References listed on IDEAS

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