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Tidal energy extraction: renewable, sustainable and predictable.
R F Nicholls-Lee1, S R Turnock
1University of Southampton, Southampton, UK. r.f.nicholls-lee@soton.ac.uk
Science Progress
|May 6, 2008
Summary
Tidal energy offers a sustainable power source, driven by planetary motion. Further research is needed to optimize devices for cost-effectiveness and long-term marine durability.
Area of Science:
- Oceanography
- Renewable Energy Engineering
- Environmental Science
Background:
- Tidal flow, generated by celestial gravitational forces, represents a significant untapped renewable energy resource.
- Understanding tidal current dynamics is crucial for efficient energy extraction, influenced by bathymetry and coastal geography.
- The global imperative to reduce carbon dioxide emissions and volatile fossil fuel prices drives interest in alternative energy solutions like tidal power.
Purpose of the Study:
- To investigate the fundamental physical principles governing tidal generation and water movement.
- To classify and evaluate existing and proposed technologies for harnessing tidal energy.
- To assess the potential efficiency, installation methods, and environmental resilience of tidal energy conversion systems.
Main Methods:
- Analysis of tidal dynamics, considering factors like seabed depth, landmasses, and coastal formations.
- Classification of tidal energy extraction methods into potential energy storage and direct kinetic energy capture systems.
- Survey and evaluation of candidate device designs, focusing on energy conversion efficiency and installation feasibility.
Main Results:
- Tidal energy extraction is feasible through devices that manage potential energy or directly capture kinetic energy.
- Promising designs show potential for efficient energy conversion, though installation specifics require further study.
- The study highlights the critical need for enhanced understanding of device durability for long-term operation in marine environments.
Conclusions:
- Tidal energy is poised for increased utilization due to environmental and economic pressures.
- Further development is essential, particularly for kinetic energy devices, to ensure long-term performance and survivability in the ocean.
- Optimizing tidal energy systems requires a deeper comprehension of marine environmental impacts and material resilience.