Tidal Energy

The Tidal Energy

JAYANT KEDIA

UE114024

Index

• Introduction

• Tides

• Tidal power

• How does it works?

• Types of tidal plants

• Pros and Cons of Tidal Power

• Major tidal power plants

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.

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.

Tides Formation

The high tide

The low tide

Tidal power

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.

How does it work?

The tide flows in two directions under the water

How does it work?

When the tide flows forward, the propellers turn anti-clockwise

How does it work?

When the tide flows backwards, the propellers turn in the opposite direction

Tidal Energy

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

Types of tidal plants

Tidal Barrage Tidal current turbines

Tidal Barrage

The Rance tidal barrage in North-West France is the largest in the world

Tidal current turbines

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

Pros and Cons of Tidal Power

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 .

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

Major Tidal plants in World

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.

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

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