Joule Project JIRP106/03 Oct 2006 – Dec 2008 Investigator Team: UoL - Department of Engineering:...
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Joule Project JIRP106/03 Oct 2006 – Dec 2008
Investigator Team:
UoL - Department of Engineering:
Richard Burrows, Nick Yates,
TS Hedges, DY Chen, Ming Li, JG Zhou
POL: Ian Walkington, Judith Wolf,
J Holt, R Proctor, (D Prandle)
Liverpool Energy DayForesight Centre
Tues 23rd June 2009
The UK Tidal Range Renewable Energy
Resource
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Global Tidal Amplitudes
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Tidal Barrage Power Generation
Lasting source of clean energy
Large capacity and secure Time of production
predictable Tried and tested La Rance operating > 40
yrs Flood protection Transport link Tourism Disadvantage - some
environmental modification but not necessarily degradation!!
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Power Generation
Tide Elevation
Basin Elevation
hmin
delayt
z
Tidal Ebb-mode Power Generation
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Ebb mode operation: 840MW station (40@21MW) - Annual Energy ~ 1.35TWh
5
‘Flat-Estuary’ 0-D Modelling: Dee Estuary (8m turbines)
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Operating Modes
Ebb1.35 TWh
Dual1.30 TWh
Flood0.79TWh
3 3.5 4 4.5 5
-3
-2
-1
0
1
2
3
Time (days)
Water D
epth (m
)
3 3.5 4 4.5 5 5.5
-3
-2
-1
0
1
2
3
Time (days)
Water D
epth (m
)
3 3.5 4 4.5 5 5.5
-3
-2
-1
0
1
2
3
Time (days)
Water D
epth (m
)
Dee Estuary (40x21MW 8m turbines, 40x8mx12m sluices)
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Dual mode operation: 800MW station (80@10MW) - Annual Energy ~ 1.87T Wh
[40@10MW ~ 1.23 TWh]
1.8 2 2.2 2.4 2.6 2.8-4
-3
-2
-1
0
1
2
3
4
Time (days)
Wate
r D
epth
(m
)
Dee Estuary (8m turbines) – Dual-Mode Operation
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2-D Modelling using ADCIRCand Unstructured Grid Generation
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Flow simulations around the whole grid
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Flow simulations around the Irish Sea
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(1xDoEn) ebb Change to Tidal Components
M2 S2
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Flow simulations around the Dee & Mersey Barrages
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(1xDoEn) Ebb Mode Power Output
Annual Output (TWh)
Severn 15.81
Dee 0.89
Morecambe Bay
5.98
Solway 9.66
Mersey 0.57
Total 32.91
Common Delay of 2 hours imposed
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(1xDoEn) ebb Spring / Neap Power
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(1xDoEn) dual Spring / Neap Power
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1xDoEn Ebb-Mode Energy
(TWh)
1xDoEn Dual-Mode Energy
(TWh)
3xDoEn Dual-Mode Energy
(TWh)
Solway 9.66 6.82 10.80
Morecambe Bay
5.98 3.99 7.13
Mersey 0.57 0.74 0.97
Dee 0.89 0.80 1.35
Total Energy (TWh)
UK (%)
Total Energy (TWh)
UK (%) Total Energy (TWh)
UK (%)
North West 17.10 4.5 12.34 3.2 20.24 5.3
Severn 15.81 4.2 14.01 3.7 20.01 5.3
Total 32.91 8.7 26.35 6.9 40.25 10.6
Energy Outputs from 2-D Modelling- provisional figures not fully validated
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Grid of the west coast model showing the locations of the four simulated tidal stream farms: Mersey (blue); Skerries (yellow); West Wales (green); Lynmouth (red).
Modelling tidal stream power potential
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Modelling tidal stream power potential
Rated Capacity (MW)
Rated Speed (m/s)
Mersey 20 2.4
Lynmouth 30 2.0
Skerries 10.5 2.4
West Wales
8 2.0
Annual Output (GWh/y)
Utilisation (%)
Mersey 7.8 5
Lynmouth 40.9 16
Skerries 40.0 44
West Wales
37.9 55
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Change in current speed at the tidal stream farms:- Mersey LynmouthSkerries West Wales
Modelling tidal stream power potential
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Contents
From MacKay (2009)
‘Sustainable Energy- without the hot air’
Red/pink - Regions with peak currents exceeding 1m/s
Estuary barrage
Coastal lagoon
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CONCLUDING COMMENT
The UK possesses natural resources in tidal energy capable of making a significant impact on its CO2 emissions.
_____________ Tidal barrages in the estuaries of the Northwest would be
capable of meeting about half the region’s electricity need
UK tidal resource ~ 15% barrage/lagoon + ~ 5% ‘stream’
ISSUES outstanding:-sediments – morphological changes & biodiversity implications;
tidal regime change & biodiversity implications;tidal stream resource and array performance evaluation;
optimal operational scheduling - grid balancing; hydro-mechanical plant performance;
economics - holistic cost-benefit analysis Further information:
www.liv.ac.uk/engdept/tidalpower
Any questions?