USAGE OF TIDAL ENERGY A.MANOJ CHOWDARY AM.EN.U4EEE

Index Introduction Tides Tidal power How it works Types of tidal plants Generation using various methods. Advantages and Disadvantages of Tidal Power Currents sites of tidal power plants Future scope conclusion 2

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. 3

WHAT IS A TIDE ? 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 oceans 4

What is the Tidal force ? What is the Tidal force ?  The tidal force is the vectorial difference between the gravitational force of the Earth and the gravitational force of the Moon. 5

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THE HIGH TIDE THE LOW TIDE THE HIGH TIDE THE LOW TIDE 7

Tidal Power  Tidal power is generated by a turbine under water that spins making the mechanical energy to electrical through a generator that send the electrical energy to the shore.  Tidal power has potential for future electricity generation and is more predictable than wind energy and solar power 8

Types of tidal plants Tidal BarrageTidal stream generator  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 9

TIDAL BARRAGE Barrages make use of the potential energy from the difference in height (or head) between high and low tides. Barrages suffer from the problems of very high civil infrastructure costs, few viable sites globally and environmental issues. 10

WORKING OF TIDAL BARRAGE 11

CATEGORIES OF GENRATION EBB GENERATION FLOOD GENERATION PUMPING TWO BASIN SCHEMES 12

The potential energy contained in a volume of water is given by: 13

ADVANTAGES OF TIDAL BARRAGE 14

LIST OF TIDAL BARRAGES Le Rance Tidal Barrage-240MW Uldolmok Tidal Barrage-90MW Tees Barrage-80MW Annapolis Royal Tidal Barrage-20MW Jiangxia TidalBarrage-3.2MW 15

Tidal Barrage The Rance tidal barrage in North-West France is the largest in the world 16

TIDAL STREAM GENERATOR 17 A tidal stream generator is a machine that extracts energy from moving masses of water, or tides. These machines function very much like underwater wind turbines, and are sometimes referred to as tidal turbines. Tidal stream generators are the cheapest and the least ecologically damaging.

TYPES OF TIDAL STREAM GENRATORS  Axial turbines  Cross flow turbines  Flow augmented turbines  Oscillating devices 18

Tidal current turbines 19

ENERGY CALCULATION : 20

ADVANTGES OF TIDAL STREAM GENERATOR Low Noise Pollution  Sound levels transmitted are very low High Predictability  Tides predicted years in advance, unlike wind High Power Density  Much smaller turbines than wind turbines for the same power 21

Current sites of tidal power plants StationCapacity (MW) Country Sihwa Lake Tidal Power Station 254South Korea Rance Tidal Power Station240France Annapolis Royal Generating Station 20Canada Jiangxia Tidal Power Station3.2China Kislaya Guba Tidal Power Station 1.7Russia Uldolmok Tidal Power Station 1.5South Korea Strangford Lough SeaGen Sundaraban area United Kingdom india 22

ADVANTAGES 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%. 23

1.Cost of construction of tidal power plant is high. 2.Intensity of sea waves is unpredictable and there can be damage to power generation units. 3. Influences aquatic life adversely and can disrupt migration of fish. 24

FUTURE SCOPE: 25

INDIA SCOPE TOWARDS TIDAL ENERGY : 26 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

27  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

References Wikipedia.org Slideshare.com Alternative-energy-news.info Google.com 28

QUESTIONS ?? 29

THANK YOU 30