• Renewable energy is generally defined as energy that comes from
resources which are naturally replenished on a human timescale such as
sunlight, wind, rain, tides, waves and geothermal heat .
• Tidal power, also called tidal energy, is a form of hydropower that
converts the energy of tides into useful forms of power - mainly
• Tides are the rising and falling of Earth's ocean surface caused
by the tidal forces of the Moon and the Sun acting on the
The tidal force is the vectorial
difference between the gravitational
force of the Earth and the gravitational
force of the Moon.
• It is a form of hydropower that exploits the movement
of water caused by tidal currents or the rise and fall in
sea levels due to the tides.
• Although not yet widely used, tidal power has
potential for future electricity generation and is more
predictable than wind energy and solar power.
Are Typically dams, built across on estuary of bay
Make use of the kinetic energy of moving water to
power turbines in a similar way to wind turbines
that use wind to power turbines
1. It is a renewable source of energy.
2. Tidal energy is environment friendly energy
and doesn't produce greenhouse gases.
3. Because 71% of Earth’s surface is covered by
water, it is possible to generate this energy on
a large scale.
4. Efficiency of tidal power is far greater as
compared to coal, solar or wind energy. Its
efficiency is around 80%.
1. Cost of construction of tidal power plant is high.
2. There are very few ideal locations for
construction of plant and they too are localized
to coastal regions only.
3. Intensity of sea waves is unpredictable and
there can be damage to power generation units.
4. Influences aquatic life adversely and can
disrupt migration of fish.
• A tidal power scheme is a long-term source of electricity.
• A proposal for the Severn Barrage, if built, has been projected to save 18 million
tonnes of coal per year of operation.
• This decreases the output of greenhouse gases into the atmosphere.
• tidal power is one of the alternative source of energy that will need to be developed to
satisfy the human demand for energy.
• India scope towards tidal energy India is still not using the tidal energy .
In Jan 2011, the state of Gujarat announced plans to install Asia’s first commercial-scale tidal
current power plant; the state government approved the construction of a 50 MW project in the
Gulf of Kutch
• Tides play a very important role in the formation of global climate as well as the
ecosystems for ocean habitants.
• At the same time, tides are a substantial potential source of clean renewable energy for
future human generations.
• Depleting oil reserves, the emission of greenhouse gases by burning coal, oil and other
fossil fuels, nuclear waste will inevitably force people to replace most of our traditional
energy sources with renewable energy in the future. Tidal energy is one of the
best candidates for this