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Green

a systemic approach to energy

Editor-in-Chief: Schlögl, Robert

Managing Editor: Tiedtke, Marion

Editorial Board Member: Luther, Joachim / Meng, Qingbo / Hüttl, Reinhard F. / Koumoto, Kunihito / Gasteiger, Hubert


CiteScore 2016: 1.14

SCImago Journal Rank (SJR) 2016: 0.442
Source Normalized Impact per Paper (SNIP) 2016: 0.677

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1869-8778
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Meteorological Aspects of Wind Park Design

Stefan Emeis
  • Corresponding author
  • Institute for Meteorology and Climate Research – Atmospheric Environmental Research, Karlsruhe Institute of Technology, Kreuzeckbahnstr. 19, 82467 Garmisch-Partenkirchen, Germany
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Published Online: 2011-07-25 | DOI: https://doi.org/10.1515/green.2011.014

Abstract

A simple consideration - based on an analytically solvable model of the momentum balance - is presented, which calculates the reduction in wind speed at hub height in an indefinitely large wind park as function of surface roughness, atmospheric thermal stability, and the mean distance between the wind turbines in this wind park. Weakest reduction occurs for a wind park erected on a rough land surface during unstable thermal stratification (minus 2%). Highest reduction occurs for an offshore wind park over a very smooth sea surface during stable thermal conditions (minus 45%). This model can be used to find the optimum distance between wind turbines in wind parks. Likewise this model calculates the wake length of entire wind parks as function of surface roughness and thermal stability. For offshore wind parks wake lengths between 10 and 30 km are found, for onshore parks this length is much less. This additional information can be used to find the optimum distance between adjacent wind parks.

Keywords.: Wind park efficiency; wake length; momentum balance; analytical model

About the article

Received: 2011-05-11

Accepted: 2011-05-25

Published Online: 2011-07-25

Published in Print: 2011-07-01


Citation Information: Green, ISSN (Online) 1869-8778, ISSN (Print) 1869-876X, DOI: https://doi.org/10.1515/green.2011.014.

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