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Tidal Stream Prospects Dr Jamie Grimwade Technology Specialist – Marine Renewables [email protected] 0044 (0)1670 357601 Regen SW – Renewables Futures 2007 Western-Super-Mare Nov 14th 2007
Contents NaREC Introduction Technology – Types – Development Status Resource Potential – Total Resource – Attainability Issues – Grid Connection – Cost of Energy
NaREC – – – –
Formed Feb 2003 RDA Set up Limited by Guarantee 73 Employees
Technology Areas – – – – – –
Marine Wind High Voltage PV Embedded Generation Micro Renewables
Tidal Testing – Large Scale (1/10th) NaREC Recent Tidal Developments – – – – –
Recent Development Flow >1m/s Length = 35m Width = 6m Depth = 1m to 5m
Fabrication, Instrumentation, DAQ, Experimental Design, Analysis & Reporting
Tidal Stream Technologies Foundations Bottom mounted – piled foundation – gravity foundation
Surface piercing – pile mounted (ease of access)
Floating – moored foundation
Graphic provided by EMEC
Tidal Stream Technologies – Vertical Axis
Verdant Power
MCT Lunar
Evopod TidEl
Tidal Stream Technologies – Horizontal Axis Golhov
Wells Savonius Darrious
Blue Power
Mermade
Tidal Stream Technologies – Reciprocating Foils
Pulse Generation
Sting Ray
Development Status Time Line 2009 2008 2007 2006 2005 2004 2003
Dti Tidal Resource Atlas
Physical Potential Site Energy Yield – Boundary layers on flow rates – Variance of mean peak springs and neaps – Variance of tidal ‘ebb’ and ‘flood’ – Bathymetry oddities
Flow Strength Envelopes
Channel Width
Channel Depth Channel Floor
© CT
Device Performance Technology – – – –
Device Efficiency Array Effects System Reliability O&M Power Shed
Rated Power
Power Power Capture
Cut in
Flow Velocity
© CT
Constraints Sea Usage Competition – – – – –
Fishing Commercial Navigation Aggregate Extraction MOD Recreational Use (Diving, Sailing etc) – Existing Pipeline and Cables – Marine Conversation Area
Grid Constraints Transmission Network
Power Flows Resource Atlas © NGT
400KV 240/125KV
Tidal Resource Study 1 Quantification of Exploitable Tidal Energy Resources in UK Water, ABP mer (npower juice) – – – –
Suitable UK Water: 28000 KM2 (3.1%) Installed Cap range: 19000MW – 39000MW Technically Extractable: 94TWh/year Exploitable within next: 10 years 4.3TWh/year (assumes 569 devices in 30MW arrays in top 50 sites)
Tidal Resource Study 2 Tidal Stream Phase II – UK Tidal Stream Energy Resource Assessment, B&V (Carbon Trust) – – – – – –
Based upon 10 ‘most important sites’ Flow rates exceeding 2.5m/s most economic SIF evaluated Technically Extractable 11.3TWh/year (top 10) 2/3 UK resource is in 40m+ depth 4% UK ele consumption
Cost of Energy Marine Energy Challenge – – – – –
£3m, 18 month programme Estimated costs for 1st farms 10MW farms IRR 15% 9p/KWh – 18p/KWh
© CT
Future Marine Energy: Results of the Marine Energy Challenge: Cost competitiveness and growth of wave and tidal stream energy
Conclusions Emerging & promising energy mix option Technology consolidation is Horizontal Axis? CoE better than wave (in short term) but less sites Big constraint is Grid Connection Utilities and Multinationals are ‘watching’
Dr Jamie Grimwade Technology Specialist – Marine Renewables [email protected]
Contents NaREC Introduction Technology – Types – Development Status Resource Potential – Total Resource – Attainability Issues – Grid Connection – Cost of Energy
NaREC – – – –
Formed Feb 2003 RDA Set up Limited by Guarantee 73 Employees
Technology Areas – – – – – –
Marine Wind High Voltage PV Embedded Generation Micro Renewables
Tidal Testing – Large Scale (1/10th) NaREC Recent Tidal Developments – – – – –
Recent Development Flow >1m/s Length = 35m Width = 6m Depth = 1m to 5m
Fabrication, Instrumentation, DAQ, Experimental Design, Analysis & Reporting
Tidal Stream Technologies Foundations Bottom mounted – piled foundation – gravity foundation
Surface piercing – pile mounted (ease of access)
Floating – moored foundation
Graphic provided by EMEC
Tidal Stream Technologies – Vertical Axis
Verdant Power
MCT Lunar
Evopod TidEl
Tidal Stream Technologies – Horizontal Axis Golhov
Wells Savonius Darrious
Blue Power
Mermade
Tidal Stream Technologies – Reciprocating Foils
Pulse Generation
Sting Ray
Development Status Time Line 2009 2008 2007 2006 2005 2004 2003
Dti Tidal Resource Atlas
Physical Potential Site Energy Yield – Boundary layers on flow rates – Variance of mean peak springs and neaps – Variance of tidal ‘ebb’ and ‘flood’ – Bathymetry oddities
Flow Strength Envelopes
Channel Width
Channel Depth Channel Floor
© CT
Device Performance Technology – – – –
Device Efficiency Array Effects System Reliability O&M Power Shed
Rated Power
Power Power Capture
Cut in
Flow Velocity
© CT
Constraints Sea Usage Competition – – – – –
Fishing Commercial Navigation Aggregate Extraction MOD Recreational Use (Diving, Sailing etc) – Existing Pipeline and Cables – Marine Conversation Area
Grid Constraints Transmission Network
Power Flows Resource Atlas © NGT
400KV 240/125KV
Tidal Resource Study 1 Quantification of Exploitable Tidal Energy Resources in UK Water, ABP mer (npower juice) – – – –
Suitable UK Water: 28000 KM2 (3.1%) Installed Cap range: 19000MW – 39000MW Technically Extractable: 94TWh/year Exploitable within next: 10 years 4.3TWh/year (assumes 569 devices in 30MW arrays in top 50 sites)
Tidal Resource Study 2 Tidal Stream Phase II – UK Tidal Stream Energy Resource Assessment, B&V (Carbon Trust) – – – – – –
Based upon 10 ‘most important sites’ Flow rates exceeding 2.5m/s most economic SIF evaluated Technically Extractable 11.3TWh/year (top 10) 2/3 UK resource is in 40m+ depth 4% UK ele consumption
Cost of Energy Marine Energy Challenge – – – – –
£3m, 18 month programme Estimated costs for 1st farms 10MW farms IRR 15% 9p/KWh – 18p/KWh
© CT
Future Marine Energy: Results of the Marine Energy Challenge: Cost competitiveness and growth of wave and tidal stream energy
Conclusions Emerging & promising energy mix option Technology consolidation is Horizontal Axis? CoE better than wave (in short term) but less sites Big constraint is Grid Connection Utilities and Multinationals are ‘watching’
Dr Jamie Grimwade Technology Specialist – Marine Renewables [email protected]
