Tidal Power <ul><li>Tidal Barrages </li></ul><ul><li>Tidal Lagoons </li></ul>
Tidal Power <ul><li>Tidal Barrages </li></ul><ul><li>Tidal Lagoons </li></ul>
<ul><li>Kinetic and potential energy </li></ul><ul><li>Takes the form of electricity </li></ul><ul><li>Very new technology...
Resource Potential <ul><li>Severn Barrage: </li></ul><ul><ul><li>Proposed installed capacity  </li></ul></ul><ul><ul><li>o...
Site Specific <ul><li>Tidal range </li></ul><ul><li>Numerous potential sites around the world </li></ul>
Site Specific
Environmental Issues <ul><li>Negative Environmental Impacts:  </li></ul><ul><li>Fish </li></ul><ul><ul><li>Passing through...
Environmental Issues <ul><li>Positive Environmental Impact:  </li></ul><ul><li>Decreased carbon emissions </li></ul>
Barriers <ul><li>Political </li></ul><ul><ul><ul><li>No returns for decades </li></ul></ul></ul><ul><ul><ul><li>Time until...
Cost <ul><li>Severn Barrage </li></ul><ul><li>£10-15 billion at current prices </li></ul><ul><li>At November 1991 prices, ...
Tidal Lagoon <ul><li>Rubble mound impoundment structure </li></ul><ul><li>“ Looks like a rocky island” </li></ul>
Tidal Lagoon ~50% Conventional power station 60% Multi-pool lagoon 48% Single-pool lagoon 28% Barrage Load factor Structure
Swansea Bay <ul><li>60 MW single-pool tidal lagoon </li></ul><ul><li>5 km 2  area </li></ul><ul><li>24 x 2.5 MW low-head K...
Swansea Bay UK Resource Potential
<ul><li>UK Resource ~ 6 GW </li></ul><ul><li>World Resource ~ 120 GW </li></ul>UK Resource Potential UK Resource Potential
Economics <ul><li>Capital costs: </li></ul><ul><ul><ul><li>£79 million </li></ul></ul></ul><ul><ul><ul><li>£1.32 m per MW ...
Environmental Impacts Sterilise sea floor Prevent coastal erosion Change sedimentation patterns Create new habitats Negati...
Media Coverage
Political Barriers House of Commons Hansard Debate, 23 rd  March 2006 Adam Price (Carmarthen, East and Dinefwr) : “The Car...
 
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Tidal Power

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University of Bath, 2006

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  • Two types of technology
  • The tide can be thought of as a large wave possessing both gravitational potential and kinetic energy
  • Map from Tidal Power by Baker
  • The alternative: tidal lagoons Invented by Peter Ullman of Tidal Electric
  • The alternative: tidal lagoons
  • The alternative: tidal lagoons
  • The alternative: tidal lagoons
  • The alternative: tidal lagoons
  • The alternative: tidal lagoons Invented by Peter Ullman of Tidal Electric in 1995
  • The alternative: tidal lagoons Invented by Peter Ullman of Tidal Electric
  • The alternative: tidal lagoons Invented by Peter Ullman of Tidal Electric
  • The alternative: tidal lagoons Invented by Peter Ullman of Tidal Electric
  • The alternative: tidal lagoons Invented by Peter Ullman of Tidal Electric
  • Tidal Power

    1. 2. Tidal Power <ul><li>Tidal Barrages </li></ul><ul><li>Tidal Lagoons </li></ul>
    2. 3. Tidal Power <ul><li>Tidal Barrages </li></ul><ul><li>Tidal Lagoons </li></ul>
    3. 4. <ul><li>Kinetic and potential energy </li></ul><ul><li>Takes the form of electricity </li></ul><ul><li>Very new technology </li></ul><ul><li>Can’t control when power is generated because it is controlled by the tides </li></ul>Tidal Barrage
    4. 5. Resource Potential <ul><li>Severn Barrage: </li></ul><ul><ul><li>Proposed installed capacity </li></ul></ul><ul><ul><li>of 8640MW </li></ul></ul><ul><ul><li>Total UK potential is estimated </li></ul></ul><ul><ul><li>at 2% of electricity requirements </li></ul></ul><ul><li>World: estimated total potential is 34,247MW </li></ul>
    5. 6. Site Specific <ul><li>Tidal range </li></ul><ul><li>Numerous potential sites around the world </li></ul>
    6. 7. Site Specific
    7. 8. Environmental Issues <ul><li>Negative Environmental Impacts: </li></ul><ul><li>Fish </li></ul><ul><ul><li>Passing through turbines </li></ul></ul><ul><ul><li>Annapolis Royal </li></ul></ul><ul><ul><li>Alternative passage technologies proposed </li></ul></ul><ul><li>Pollution, Sediment, & the Ecosystem </li></ul><ul><li>During the building process </li></ul>
    8. 9. Environmental Issues <ul><li>Positive Environmental Impact: </li></ul><ul><li>Decreased carbon emissions </li></ul>
    9. 10. Barriers <ul><li>Political </li></ul><ul><ul><ul><li>No returns for decades </li></ul></ul></ul><ul><ul><ul><li>Time until completion </li></ul></ul></ul><ul><li>Institutional </li></ul><ul><ul><ul><li>Shipping interests </li></ul></ul></ul><ul><ul><ul><li>RSPB </li></ul></ul></ul><ul><ul><ul><li>Friends of the Earth </li></ul></ul></ul>
    10. 11. Cost <ul><li>Severn Barrage </li></ul><ul><li>£10-15 billion at current prices </li></ul><ul><li>At November 1991 prices, electricity would cost about 6p per kWh </li></ul>
    11. 12. Tidal Lagoon <ul><li>Rubble mound impoundment structure </li></ul><ul><li>“ Looks like a rocky island” </li></ul>
    12. 13. Tidal Lagoon ~50% Conventional power station 60% Multi-pool lagoon 48% Single-pool lagoon 28% Barrage Load factor Structure
    13. 14. Swansea Bay <ul><li>60 MW single-pool tidal lagoon </li></ul><ul><li>5 km 2 area </li></ul><ul><li>24 x 2.5 MW low-head Kaplan turbines </li></ul><ul><li>“ Technically feasible, environmentally plausible, and economically viable” </li></ul><ul><li>Atkins Consultants Ltd. 2004 </li></ul>
    14. 15. Swansea Bay UK Resource Potential
    15. 16. <ul><li>UK Resource ~ 6 GW </li></ul><ul><li>World Resource ~ 120 GW </li></ul>UK Resource Potential UK Resource Potential
    16. 17. Economics <ul><li>Capital costs: </li></ul><ul><ul><ul><li>£79 million </li></ul></ul></ul><ul><ul><ul><li>£1.32 m per MW installed capacity </li></ul></ul></ul><ul><li>Cost of electricity: </li></ul><ul><ul><ul><li>3.4p per kWh for Swansea Bay </li></ul></ul></ul><ul><ul><ul><li>2.0-2.5p per kWh for larger lagoons </li></ul></ul></ul><ul><li>Sequential finance </li></ul><ul><ul><ul><li>Lower investor risk </li></ul></ul></ul>
    17. 18. Environmental Impacts Sterilise sea floor Prevent coastal erosion Change sedimentation patterns Create new habitats Negative Positive
    18. 19. Media Coverage
    19. 20. Political Barriers House of Commons Hansard Debate, 23 rd March 2006 Adam Price (Carmarthen, East and Dinefwr) : “The Carbon Trust has estimated that up to 20% of the UK's energy needs could come from marine energy sources. Can the Secretary of State explain why so many tidal power projects have been rejected by the Department, and in particular the Swansea bay tidal lagoon project, which the Department has condemned out of hand as prohibitively expensive?” Alan Johnson (DTI): “ I do not accept that we have not supported wind and tidal power. There has been a focus on wind…. “ [...] I do not accept the criticism that the honourable Gentleman makes, but I do accept his point that wind and tidal power is a crucial aspect of our energy future.”
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