Wave energy is extracted from ocean surface waves and converted to useful energy like electricity. There have been attempts to harness wave power since the 18th century, but modern research began in the 1940s. Prototypes were tested in the 1980s and the first wave farm opened in 2008 in Portugal. Wave energy converters use various mechanisms like oscillating water columns to transform wave motion into pressure or mechanical energy, and then into electricity. Common types are oscillating water columns, oscillating bodies, and overtopping devices. While wave energy is renewable and clean, locations suitable for efficient wave power are limited and wave farms face challenges from marine life and inconsistent wave strength.

1. WAVE ENERGY

2. Wave energy is the transport
of energy by ocean surface
waves, and the capture of
energy to do useful work for
example, electric generation,
water desalination or the
pumping of water .

3.  The first known patent to use energy from
ocean waves dates back to 1799 and was
filed in Paris by Girard and his son.
 An early application of wave power was a
device constructed around 1910.
 Modern scientific pursuit of wave energy was
pioneered by Yoshio Masuda’s experiments in
the 1940s.
 In the 1980s, a few first-generation
prototypes were tested at sea.
 In 2008, the first experimental wave farm was
opened in portugal.

4.  Wave energy converters (WECs) are machines,
devices or methods used to exploit wave
power and convert it to electrical power.
 Firstly, wave energy is transformed to energy
in working fluids (working fluids are different
due to the type of wave energy converter),
then this energy is converted to mechanical
energy using a motor or a turbine.
 Finally, this mechanical energy rotates a
generator to produce electrical energy.

5. 1) Oscillating Water Column (OWC) :- They
convert the energy of the waves into air
pressure.
2) Oscillating Body :- They turn the oscillating
height of the oceans surface into
mechanical energy.
3) Overtopping :- They convert the energy of
the waves into potential energy.

6. The oscillating water column (OWC) is a popular
shoreline wave energy and it can be installed both
as a shore-based system and as a floating system.
They consists of a partly submerged hollow
chamber fixed directly at the shoreline which
converts wave energy into
air pressure.

7. An oscillating body wave energy converter is a device
designed to harness energy from the motion of ocean
waves. It typically consists of a buoyant structure that
moves up and down or back and forth with the waves,
converting this mechanical energy into electrical power
through various mechanisms such as
hydraulic systems, electromagnetic
generators, or piezoelectric materials.

8. Overtopping devices capture sea water waves in
a reservoir above the sea level, and then releases
the water back to sea through turbines. The water
waves enter the reservoir passing over a tilted
ramp. This system can be installed both on-shore
as a shore-based system and off-shore as a
floating system.

9.  Renewable: The best thing about wave energy is
that will never run out. Unlike fossil fuels, which
are running out. The waves flow back from the
shore, but they always return.
 Environmental friendly: Also creating power from
waves creates no harmful byproducts such as
gas, waste and pollution.
 The energy is free-no fuel needed no waste
produced.
 Not expensive to operate and maintain.
 Can produce a great deal of energy.
 It is a reliable source.

10.  Suitable to Certain Locations: The biggest disadvantage
to getting your energy from the waves is location. Only
power plants and towns near the ocean will benefit
directly from it.
 Effect of marine Ecosystem: As clean as wave energy is,
it still creates hazards for some of the animals near it.
 Depends on the waves-sometimes you’ll get loads of
energy, sometimes almost nothing.
 Needs a suitable site, where waves are consistently
strong.
 Weak performance in rough weather.
 Noisy and maintenance effects.

11. THANK
YOU