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Wind power in forests: wind and effects on loads
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. (LUVAL - vindenergi)
KTH.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. (LUVAL - vindeneergi)
Teknikgruppen.
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2013 (English)Report (Other academic)
Abstract [en]

Within the project V-312, Wind power in forests, researchers and a PhD student at Uppsala University, WeatherTech Scandinavia, the Royal Institute of Technology (KTH), DTU Wind Energy in Denmark and Teknikgruppen have been cooperating. Within the project atmospheric turbulence measurements with high vertical resolution have been done, also down between the trees, to make it possible to give better theoretical descriptions of the observed properties. Several mesoscale models have also been used to model the above forest winds. The atmospheric measurements have been complemented by wind tunnel measurements using a wind tunnel floor designed with small cylindrical wooden sticks that should simulate the effect of the trees generating a known momentum sink able to affect the flow. The combined new knowledge about the forest boundary layer wind and turbulence properties have been used as input to a dynamical wind turbine computer model, used to simulate the turbine load response to the turbulent wind field.

Abstract [sv]

I projektet V-312, Vindkraft i skog, har forskare och en doktorand vid Uppsala universitet, WeatherTech Scandinavia, Kungliga tekniska högskolan (KTH), DTU Wind Energy i Danmark och Teknikgruppen samarbetat. I projektet har det gjorts mätningar med hög vertikal upplösning av turbulensen i atmosfären, även ned mellan träden, syftande till att möjliggöra en bättre teoretisk beskrivning av de observerade egenskaperna. Dessutom har flera mesoskaliga modeller använts för att modellera vindarna ovanför skogen. Mätningarna i atmosfären har kompletterats med vindtunnelmätningar där bottnen i vindtunneln har bestyckats med små cylindriska träpinnar vilka skulle simulera effekterna av träd och ge upphov till en känd friktionskraft som påverkar strömningen. De kombinerade nya kunskaperna om vind och turbulens i gränsskiktet över en skog har använts för att driva en datormodell som beskriver dynamiken hos vindturbinerna. Detta har sedan använts för att simulera lasterna på turbinerna som uppstår i det turbulenta vindfältet.

Place, publisher, year, edition, pages
Stockholm: Elforsk AB , 2013. , 167 p.
Series
Elforsk Rapport, 13:09
Keyword [en]
forest, surface layer, measurements, modelling, wind power, loads
National Category
Meteorology and Atmospheric Sciences
Research subject
Meteorology
Identifiers
URN: urn:nbn:se:uu:diva-220186OAI: oai:DiVA.org:uu-220186DiVA: diva2:704370
Projects
Vindforsk - vind power in forests
Funder
Swedish Energy Agency, V-312
Available from: 2014-03-12 Created: 2014-03-12 Last updated: 2014-03-12Bibliographically approved

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Bergström, Hans

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