This document discusses tidal energy and how it works. Tidal energy harnesses the power of tides, which are caused by gravitational forces from the moon and sun. There are two main types of tidal power plants - tidal barrages and tidal current turbines. Tidal barrages are dams built across estuaries or bays, while tidal current turbines use the kinetic energy of moving water like wind turbines use wind. Major tidal plants exist in places like France, India, and South Korea. The document outlines the pros and cons of each tidal power technology and notes tidal energy is a renewable source but installation and maintenance can be challenging.
2. Index
• Introduction
• Tides
• Tidal power
• How does it works?
• Types of tidal plants
• Pros and Cons of Tidal Power
• Major tidal power plants
3. Introduction
Tidal power, also called tidal energy, is a
form of hydropower that converts the
energy of tides into useful forms of power -
mainly electricity. This is the only form of
energy whose source is the moon.
4. Tides
Tides are the rise and fall of sea levels caused by the
combined effects of the gravitational forces exerted by
the Moon and the Sun and the rotation of the Earth.
9. Tidal Power
Tidal power is actuated by a turbine under
water that spins making the mechanical
energy to electrical through a generator
that send the electrical energy to the
shore.
10. How does it work?
The tide flows in
two directions
under the water
11. How does it work?
When the tide
flows forward,
the propellers
turn anti-
clockwise
12. How does it work?
When the tide
flows
backwards,
the propellers
turn in the
opposite
direction
14. Types of tidal plants
Tidal Barrage
Are Typically dams, built
across on estuary of bay
Tidal current
turbines
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
15. Types of tidal plants
Tidal Barrage Tidal current
turbines
18. Significant benefits from using
Tidal Energy include:
Electrification of isolated communities
Generation for the grid Regrowth of
coral reefs using mineral accretion
technology
Substitution of imported petroleum used
to generate electricity
20. Tidal Barrages
Pros
Mature technology that has
been around for nearly 50
years
Reliable energy source.
Cons
High costs of construction
Environmental impacts on
marine life
Low power output in
comparison to other energy
source like coal and
nuclear power plants .
21. Tidal Current Turbines
Pros
Able to utilize both ebb and
flood tides
Tidal current turbines are not
large massive dam
structure.
Cons
Tidal current turbine
technology is young in its
development
Installation and
maintenance challenges
Environmental impacts are
still being tested
23. Tidal plants in India
West Bengal Renewable Energy Development Agency in
sunderbans.
The Indian state of Gujarat is planning to host South
Asia's first commercial-scale tidal power station. The
company Atlantis Resources is to install a 50MW tidal
farm in the Gulf of Kutch on India's west coast, with
construction starting early in 2012. later on it is decided
to increase the capacity up to 250MW plants.
24. Tidal plant in Kerala
Situated near the breakwaters of Vizhinjam Port which is
about 20 km from Thiruvananthapuram city. The station
started its commercial operation in 1991. This oscillating
water column (OWC) produces about 150 kw of power
