wind turbine wake models - sintef · wind turbine wake models stefan ivanell associate professor...

Linné Centre

Gotland University

Wind Turbine Wake Models

Stefan Ivanell

Associate Professor

Director of Energy Technology, Gotland University

Dep. of Mechanics, FLOW, KTH

www.ivanell.se 9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 1

Linné Centre

Gotland University

• Background - Wake Activities

• Basic Wake Research

• Turbine Interaction-Farm optimization

• Farm-Farm Interaction

Outline

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 2

Linné Centre

Gotland University

• Background - Wake Activities

• Basic Wake Research

• Turbine Interaction-Farm optimization

• Farm-Farm Interaction

Outline

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 3

Linné Centre

Gotland University

Nordic Consortium

Teknikgruppen AB

~ 15 Senior researcher

7 PhD students

Nordic Consortium:

Optimization and Control of Wind Farms

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 4

Linné Centre

Gotland University

Tasks

Task 1 – Wake stability and interaction, NUM (Sasan), KTH

Task 2 – Wake stability and interaction, EXP (Ylva), KTH

Task 3 – Optimization (Søren), DTU

Task 4 – Farm control and optimization (Karl), HGO/KTH

Task 5 – ICEWIND (Görkem), HGO/KTH

Task 6 – FarmFarm (Ola), HGO/KTH

Task 7 – Farm control (Ingemar), Teknikgruppen

IEA Wind (31-WakeBench, 29-NextMex, 11-Genaral WE)

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 5

Linné Centre

Gotland University

• Background - Wake Activities

• Basic Wake Research

• Turbine Interaction-Farm optimization

• Farm-Farm Interaction

Outline

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 6

Linné Centre

Background on wakes

Stability analysis of the tip vortices of a wind turbine Wind Energy 13:8, 2010, Pages: 705-715

Analysis of numerically generated wake structures Wind Energy 12:1, 2009, Pages: 63-80

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 7

Linné Centre

Gotland University

Simulation Methods

● EllipSys3D

● Impossible to represent the flow structure locally around the blade and the wake at the same time

● ACD, ACL

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 8

Linné Centre

Gotland University

[Montgomerie, Dahlberg]

Wake structure

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 9

Linné Centre

Gotland University

Stability of the tip vorticies

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 10

Linné Centre

Gotland University

Instability mode: iso-contours of vorticity; 0.33Hz, 0.66Hz

Sasan Sarmast

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 11

Linné Centre

Gotland University

Pre-generated turbulent atmospheric boundary layer with ACD

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 12

Linné Centre

Gotland University

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 13

Linné Centre

Simulation of 9 turbines - with and without atmospheric turbulence

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 14

Linné Centre

Gotland University

Simulation of 9 turbines - with and without atmospheric turbulence

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 15

Linné Centre

Gotland University

• Background - Wake Activities

• Basic Wake Research

• Turbine Interaction-Farm optimization

• Farm-Farm Interaction

Outline

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 16

Linné Centre

Lillgrund Horns Rev

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 17

Linné Centre

Wind veer

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 18

Linné Centre

Wind veer

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 19

Linné Centre

Wind veer

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 20

Linné Centre

Simulations including wind veer

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 21

Linné Centre

Gotland University

Lillgrund

Sweden

Denmark

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 22

Linné Centre

Gotland University

Lillgrund (48 SWT-2.3 MW) 3.3 x D

4.3 x D

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 23

Linné Centre

Gotland University

Vakförluster i rad 1, 3 och 5 (3.3xD)

Row 1

Row 3

Row 5

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 24

Linné Centre

Gotland University

Wake Losses

0,0

0,2

0,4

0,6

0,8

1,0

1,2

Row_A Row_B Row_C Row_D Row_E Row_F Row_G Row_H

Row_number

Re

lative

po

wer

Row_1_WD_129,0

Row_3_WD_129,0

Row_5_WD_129,1

[Jan-Åke Dahlberg]

Row 1

Row 3

Row 5

Increased Production

Decreased Loads

CFD Simulation, Karl Nilsson

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 25

Linné Centre

Gotland University

• Background - Wake Activities

• Basic Wake Research

• Turbine Interaction-Farm optimization

• Farm-Farm Interaction

Outline

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 26

Linné Centre

Gotland University

Park-Park Interaktion

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 27

Linné Centre

Gotland University

Park vak bakom Horns rev

[Sten Frandsen, Kurt Hansen et.al., The making

of a 2nd generation wind farm model]

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 28

Linné Centre

Gotland University

Återhämtning efter Horns Rev

[Sten Frandsen, Kurt Hansen et.al., The making

of a 2nd generation wind farm model]

9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 29

Linné Centre

30

Thank you for your attention!

www.ivanell.se

stefan.ivanell@hgo.se