Wave Energy

Overview

• Wave energy is generated by the movement of the ocean's surface.
• The energy created can be harnessed to generate electrical power.
• If harnessed effectively, wave energy could provide 10% of the world's energy needs.

Common Methods to Harness Wave Energy

1. Attenuators

   • Appears snake-like, sits on the ocean's surface.
   • Sections connected by joints allowing undulation with waves.
   • Hydraulic cylinders compress fluids into high-pressure accumulators to generate electricity.
   • First commercial wave power generator, capable of powering up to 500 homes per unit.

2. Overtopping Systems

   • Launched a prototype in March 2003 by a European team in Denmark.
   • Works by guiding waves to a curved ramp up into a reservoir using wave reflectors.
   • Water pressure spins turbines, converting energy into electricity with a magnetic generator.
   • Designed to withstand environmental hazards and large waves.

3. Point Absorbers

   • Uses a buoy floating above water to generate power.
   • A giant shaft is anchored to the seafloor with the buoy secured above.
   • Buoy's movement due to waves creates a pumping action that generates electricity.
   • A single unit can power 40 homes; next generation expected to generate four times that amount.

Future Potential

• Combining these systems can create wave energy farms, leading to power plants.
• Further research and development could position wave energy as a significant player in renewable energy.