What is tidal energy?
“Tidal power, also called tidal energy, is a
form of hydro power that converts the energy of
tides into electricity or other useful forms of
power which is also a Renewable source.”
Once you've built it, tidal power is free
It needs no fuel
It produces no greenhouse gases or other
There are few suitable sites for tidal barrages.
Only provide power for around 10 hours each day.
It disrupts underwater habitat and often kills fish and other underwater
Where is the closest plant?
plant is the
Does Tidal Power contribute to Global
No, Tidal Energy plants do no
release any waste or smoke or
any pollutants therefore it
does not contribute to global
How much does it cost to run a
The price of constructing a tidal plant
varies with the size of the plant. It has
been reported that the cost can get up to
48 billion dollars!
Cost per watt?
Tidal power costs 5
to 8 cents per
In comparison, oil costs
5 cents per kilowatt hour
Tidal Power: The next big
Tides are particularly attractive sources of power because they are predictable,
unlike sunshine and wind. Not surprisingly, countries with rough seas like
Britain and Portugal are leading the way in exploring ocean power.
Portugal, which now gets more than 40 percent of its electricity from
renewable sources, was one of the first countries to install a commercial “wave
farm.” There, several years ago, a British company used a snakelike device
called the Pelamis system to absorb the energy of waves.
The Portugal experiment met with mixed results before it was halted because
of financial problems. One stumbling block was that the floating machines that
absorbed wave energy quickly broke under the constant assault of the waves.
The European Energy Association estimates that, globally, the oceans could
yield more than 100.000 terawatt hours a year if the technology to harness
that power can be perfected. That is more than five times the electricity the
world uses in a year.
The law of conservation
states that energy cannot
be created or destroyed,
with tidal energy as the
tide ebbs and flows,
underwater turbines spin
like windmills. The
turbines are mounted on
a gearbox shaft which
creates electricity and
underwater cables carry
the electricity to shore
•Tidal energy is the utilization of the sun and moon's gravitational forces - as the
tide is the result of their influence
•Tidal energy is energy that could be obtained from the changing sea levels.
In other words, tidal energy is a direct result of tide shifting from low to high
•Tidal power changes the sedimentation and turbidity (how clear
the water is) of the water system.
•Turbines, similar to wind turbines, can be anchored to the sea bed to
generate electricity from tidal currents.