How does wave power capture energy from ocean waves?
The ingenuity people used in harnessing waterpower can be seen in this medieval-style mill. The waterwheel is turned by a stream and is connected to a shaft that leads into the building. At the other end of the shaft is a gear. The connection of a series of gears translates the power from the stream to a shaft that drives a millstone, which grinds flour from grain.
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Wave power is a form of renewable energy that generates electricity by harnessing the kinetic energy of ocean waves. Technology used to capture this energy typically employs the following methods:
- Floating Platforms and Buoys: These structures rise and fall with the swells of the ocean, converting the vertical motion into mechanical energy to drive a generator.1
- Jointed Tubes: Some systems utilize large, articulated tubes floating on the surface. As waves pass, the movement at the joints activates internal power generators.1
- Air Pressure Chambers: Energy can be captured by exploiting changes in air pressure within specialized chambers that face the sea.1
- Pressure Variations: Certain designs harness the changes in wave pressure that occur on the ocean floor.1
While wave energy holds significant potential, it faces technical challenges, including the high cost of building durable infrastructure and the corrosive effects of salt water on metals.1