20180508_Swansea_tidalpdf
20180508_Swansea_tidalpdf
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    TIDAL LAGOONSOnshore versus Offshore
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    Tidal Lagoons - Onshore vs OffshoreAN OPPORTUNITY FOR THE UKUK Mean Spring Tidal Range (m)The UK has some of the best tidal resources in the worldThe tidal sector could be worth £billions to the UK economy by 2050.The UK needs low carbon and low cost energy.Tidal Lagoons offer ultra long term clean energy potential.
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    Tidal Lagoon ProposalOnshore lagoon profileOshore lagoon profileOFFSHORE - BETTER BY DESIGNOffshore lagoons are not connected to the shore and this gives them a number of advantages;• Greater efficiency - more water contained for any given lagoon area (due to having no shallow end)• Lower cost to build - walls are smaller, lower and less wide, requiring significantly less rock to build• Lower environment impact - no shore connection means no interference with the inter tidal zone• Lower operating costs - Siltation is minimised due to always operating with deep waterComparison of Lagoon walls
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    Tidal Lagoons - Onshore vs OffshoreONSHORE LAGOON AT SWANSEA BAYThere is one onshore lagoon proposed for Swansea Bay:Generating capacity - 320MWAnnual production - 530GW/hCapital cost - £1.3BillionProposed government support has varied from £168MWh for 30 years, to £90 for 90 years with a more recent cost that is not fully disclosed. Expected to be at Hinkley Nuclear Power Plant plus levels.
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    Tidal Lagoon ProposalGenerating capacity - 380MWAnnual production - 600GW/hCapital cost - £0.65BillionProposed government support of £90MW/h for 25 years, lower than the cost of Hinkley Nuclear Power Plant.OFFSHORE LAGOONS AT SOLWAY FIRTHThere are two offshore lagoons proposed for Solway Firth, just one of these will have:
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Comments

    • MC
      Mike Case
      May 10, 2018
      Page 1•
      Nonsense on all fronts: nearly double the wall length for the same enclosed area as a land attached, deeper water thus more material needed for the wall, expensive subsea grid connection (up to 10x higher than land attached), construction and O&M access only by vessel, fag packet energy modelling. TEL are clueless and costs are wildly out. other than that its a great plan!
    • MC
      Mike Case
      May 10, 2018
      Page 1•
      Nonsense on all fronts: nearly double the wall length for the same enclosed area as a land attached, deeper water thus more material needed for the wall, expensive subsea grid connection (up to 10x higher than land attached), construction and O&M access only by vessel, fag packet energy modelling. TEL are clueless and costs are wildly out. other than that its a great plan!
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