BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Upper limit of wind farm power generation and wind extractability 
 - Dr Takafumi Nishino\, Dept of Engineering Science\, University of Oxford
DTSTART:20221027T103000Z
DTEND:20221027T113000Z
UID:TALK183041@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Whilst the total capacity of offshore wind farms in the North 
 Sea continues to increase\, there are considerable uncertainties in the pr
 ediction of actual power produced by them and how to improve their efficie
 ncy. The difficulty stems from the fact that the aerodynamics of large win
 d farms involves complex flow interactions across a wide range of scales\,
  not only between neighbouring turbines within a wind farm but also betwee
 n wind farms and the atmospheric boundary layer.\n\nIn this talk\, I will 
 present a combined theoretical and computational study of large wind farms
  conducted through a collaboration between Oxford and the UK Met Office ov
 er the last few years. I will start with a simple theoretical consideratio
 n of momentum balance across a large wind farm to derive a key relationshi
 p between a handful of non-dimensional parameters. Most of these parameter
 s seem to depend largely on either ‘internal’ or ‘external’ charac
 teristics of wind farm flow and not both\, explaining why this so-called 
 ‘two-scale momentum’ approach may help reduce the complexity of otherw
 ise formidable multiscale flow problem. Some computational results are the
 n presented to demonstrate the importance of an external parameter called 
 ‘wind extractability’ factor\, and an analytical model derived from th
 e two-scale momentum approach is shown to predict a practical upper limit 
 to the efficiency of large wind farms for a given wind extractability cond
 ition. The talk will end with some suggestions for future work\, including
  data-driven modelling of wind extractability and its application to wind 
 farm optimisation.
LOCATION:Open Plan Area\, Institute for Energy and Environmental Flows\, M
 adingley Rise CB3 0EZ
END:VEVENT
END:VCALENDAR