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Tidal power - Renewable energy .


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Tidal power - Renewable energy .
Mohammed Herzallah

Published in: Environment
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Tidal power - Renewable energy .

  1. 1. TIDAL POWER CLEAN TECHNOLOGY Supervision: Dr. Thomas Schaubroeck By: Gołębiowska Katarzyna Havran Iva Herzallah A M. Mohammed 2014- 2015
  2. 2. TABLE OF CONTENT • Introduction • Sustainability assessment • Economics • Environmental impacts • SWOT analysis - a case study of Poland • Conclusions and future prospective
  3. 3. Introduction Tidal energy is a result of the motion in the Earth-Moon system. The basic principles of the tidal power utilization technology are: • Altering the tidal energy by barrage systems into the electricity (Right-up picture) • Altering the kinetic energy of the tides by tidal current systems into the electricity (Right-down picture)
  4. 4. Introduction Advantages of tidal power utilization: • Renewable and durable source of energy • Predictable energy source compared with • Pollution free • Controls the impacts on a coastline against Damage from high storm tides
  5. 5. Introduction Disadvantages of tidal power utilization: • It is presently costly to build and maintain • It has negative environmental affects
  6. 6. Sustainability assessment: Economics • Initial costs of implementation – very high • Durability of these plants (more than 100 years) and rather low operation costs make them competitive on the market • Example: • La Rance, power plant in France with initial costs estimated to be around $66 million, but the money was reclaimed due to long operating time (45 years now). • For guidance only, costs in France: • La Rance-240 megawatts generator generates the electricity at 3, 7 eurocents per kwh • Conventional power plant - 10, 8 Eurocents per kwh • Nuclear power plant - 3, 8 Eurocents • Hydropower plant - 3, 7 Eurocents per kwh
  7. 7. Sustainability assessment: Environmental impacts • Only few studies by now However it is known that:  The tidal current turbines less harmful than older, barrage systems  Water turbidity affected due to the change of sedimentation movements  Ocean life suffers from direct contact with turbines  Barrage lowers the tidal range, affects the intertidal zone, thus birds that feed on it  Recent study - sound linked with the turbines shifts the water pressure, hence, harms fish tissue
  8. 8. SWOT analysis - a case study of Poland
  9. 9. SWOT analysis - a case study of Poland Opportunities Threats access to the Baltic sea unstable political situation (key role of relations with Russia – main gas provider) potential interest of investors (provided that environmental policy changes and there is more financial support) no long-term vision on energy policy puts investors off implementation of the legislation, including the energy strategy until 2020, as a further plan for supporting renewable power utilization not clear environmental legislation high costs of technology (limited utilization hydro power to units below 1 MW)
  10. 10. Conclusions and future prospective • Tidal energy is the type of green energy which is rather predictable and reliable. • Every day development of the technology makes it more applicable because it reduces its costs. • The case of France shows that tidal power can be already used efficiently, and the further development will make it even more feasible. • There is a need for more studies, however, it is known that there are severe environmental impacts that further development can reduce. • Case of Poland shows that tidal power is not the main interest among other renewable sources, however there is some potential if the new legislation and support plan are introduced.
  11. 11. Thank you !