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Energies, Free Full-Text
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In wind energy site assessment, one major challenge is to represent both the local characteristics as well as general representation of the wind climate on site. Micro-scale models (e.g., Reynolds-Averaged-Navier-Stokes (RANS)) excel in the former, while meso-scale models (e.g., Weather Research and Forecasting (WRF)) in the latter. This paper presents a fast approach for meso–micro downscaling to an industry-applicable computational fluid dynamics (CFD) modeling framework. The model independent postprocessing tool chain is applied using the New European Wind Atlas (NEWA) on the meso-scale and THETA on the micro-scale side. We adapt on a previously developed methodology and extend it using a micro-scale model including stratification. We compare a single- and multi-point downscaling in critical flow situations and proof the concept on long-term mast data at Rödeser Berg in central Germany. In the longterm analysis, in respect to the pure meso-scale results, the statistical bias can be reduced up to 45% with a single-point downscaling and up to 107% (overcorrection of 7%) with a multi-point downscaling. We conclude that single-point downscaling is vital to combine meso-scale wind climate and micro-scale accuracy. The multi-point downscaling is further capable to include wind shear or veer from the meso-scale model into the downscaled velocity field. This adds both, accuracy and robustness, by minimal computational cost. The new introduction of stratification in the micro-scale model provides a marginal difference for the selected stability conditions, but gives a prospect on handling stratification in wind energy site assessment for future applications.
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Premium PSD Energy text effect
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Energies, Free Full-Text
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Accurate determination of solvation free energies of neutral organic compounds from first principles
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Listen Free to Energy Rising: The Neuroscience of Leading with Emotional Power by Julia Digangi with a Free Trial.
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Energy systems and 24/7 carbon free energy
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Energies, Free Full-Text
Free Energy Generator ( Dr Keshe: Nikola Tesla) 3 25 14 : Free Download, Borrow, and Streaming : Internet Archive
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Barnase free-energy landscape. (A) Entropy (full symbols) and enthalpy