Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Aligned and Staggered Layouts: What is the Impact on Wind Farms Land-Use?

Version 1 : Received: 12 July 2020 / Approved: 14 July 2020 / Online: 14 July 2020 (13:57:14 CEST)

How to cite: Valotta Rodrigues, R.; Lengsfeld, C. Aligned and Staggered Layouts: What is the Impact on Wind Farms Land-Use?. Preprints 2020, 2020070315 (doi: 10.20944/preprints202007.0315.v1). Valotta Rodrigues, R.; Lengsfeld, C. Aligned and Staggered Layouts: What is the Impact on Wind Farms Land-Use?. Preprints 2020, 2020070315 (doi: 10.20944/preprints202007.0315.v1).

Abstract

The use of wind energy has been developing fast over the last years. The global cumulative wind power capacity increased by 10.5% in 2019, most of which comes from onshore wind farms. One of the consequences of this continuous increase is the use of land for onshore wind farms. There are already cases worldwide where lack of well-established plans and strategies have caused delays in projects. The need for efficiently using land for wind farms will be mandatory in the short term. In this work, we present a numerical analysis to evaluate wind farm land-use. By defining the ratio between mechanical output power over an area as a parameter called land-use ratio, this work focused on comparing several cases of aligned and staggered layouts. Mechanical output power was estimated using a validated code based on Blade Element Momentum code, and the wake velocities and wake interaction effects were estimated using a validated wind turbine CFD model. In terms of output power, staggered designs are more efficient than aligned designs. However, the results showed that even though staggered designs produced higher output power, aligned farms with tight lateral spacing could be as efficient as staggered ones in terms of land-use but using fewer turbines. In summary, tightly aligned designs should be a tendency in the future towards efficient use of land in wind farms.

Subject Areas

wind farm layout optimization problem; wind farm land-use; wind turbine wakes; wind turbine aerodynamics; tip speed ratio control

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