In the wake of a tidal stream turbine
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Transcript of In the wake of a tidal stream turbine
Contents
• Background and context• State of the art• Where my work fits in• What I am aiming to achieve• Results so far• Future work
BackgroundEuropean Marine Energy Centre established
First small test machines installedTidal Generation Ltd (TGL) founded
First power provided to UK grid
Large companies begin investingFirst 10MW arrays receive planning approval
Around 25MW UK installed capacityTGL sold to Alstom for £46m
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
A tidal turbine
30 m200 t1 MW
£8.5m?
Projected contribution to UK grid
Total figure: DECC “Gone Green” projection Tidal figure: RenewableUK Industry report (Feb 2013)
in next
1300% increase
7 years!
UK resource estimate:
32 GW95 TWh/yr(Crown Estate 2013)
20% of our electricity by 2050?
The current state of tidal power
• 20-30 years behind Wind• Test machines in the water• A few small arrays proposed• Huge challenges remain:
– Installation– Cabling– Grid connection– Array layout– Finance
Array layout
My work - Turbine wakes
Key questions
• How much power is lost when one turbine is placed behind another?
OR
• Where should a second turbine be placed in order to minimise the power deficit?
Experimental setup
Experimental setup
Experimental results
Velocity deficit
Velocity deficit
Turbine location
Recovery to 60% (3D downstream)
Eddies generated behind post
Full recovery (11D)
Experimental results
Next steps
• Full turbine data recording (power output)• Tests under a wider range of conditions