By:OM SHIVAM

EEE, Dr. MGR University, INDIA

RENEWABLE SOURCES OF ENERGY

INTRODUCTION

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Energy comes from natural resources,Which have potential of being continiousaly replenished.

Such as Solar EnergyWind EnergyHydro EnergyGeothermal Energy

Overview

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About 19% of global energy consumption came from RENEWABLES.

13% came from Biomass,used for heating3.2% came from Hydroelectricity2.7% came from other Renewables

Contribution Of Renewables In Global Electricity Generation

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18% of total global electricity generation is shared by the Renewables

While 15% is contributed by Hydroelectricity alone

and 3% is contributed by new Renewables

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Solar Energy

INTRODUCTION

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Energy derived from the sun in the form of radiation is Solar Energy.

Solar Energy applications include :- i) Space Heating & Cooling through Solar

Architectures ii) Solar Cooking; Daylighting iii) High temperature processes heat for

industrial purposes It can be harnessed in two ways:- (1) Direct (2) Indirect

Direct Harnessing Of Solar Energy

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It is used directly as in Solar cookers,Solar water heater, Solar furnace

It can also be directly converted into electrical energy as in case of Solar Cells.

Indirect Harnessing Of Solar Energy

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It includes Orienting a building to the Sun,Selecting materials with favourable thermal mass or Light dispersing properties & designing spaces that natuarally circulate air.

SOLAR CELLS

A device which directly converts solar energy into electrical Energy due to generation of potential difference.

Now a days Monocrystalline solar cells are being used which are more effective than that of ordinary solar cells.

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Advantages of Solar Energy

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Solar Cells are used to provide electrical energy to the satellites.

It is natuarally & abundantly available clean, pollution free and a renewable source of energy.

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WIND ENERGY

INTRODUCTION

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Moving air is Wind, it is produced by the temperature differences in the air.

The energy obtained from wind is called wind energy

Wind is used to run a windmill which in turn , drives generator to produce power.

Wind mills are erected over a large area, which is known as Wind Farm.

Potential Of Wind Energy

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The Netherland is famous for it,s windmills.In India Gujarat & Tamilnadu have

windmill,in which Kannyakumari has largest windmill with potential of 38OMW of electricity.

Advantages of Wind Energy

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It is inexpensive ,pollution free & is abundantly available in nature.

It can be generated and supplied to remote areas where other energy resources are not available.

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HYDRO ENERGY

INTRODUCTION

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Running water has tremendous energy. This energy can be used for running turbine to generate electricity.

Water is collected at a certain height in huge reservior,this water has a lot of potential energy, this energy use to run turbine to generate electricity.

It is an important source of electricity generation.

Potential Of Hydro Energy

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India has a number of hydro electric plants : Damodar valley project ,Hirakund Dam, Bhakra Dam

Now a days small hydroelectric projects have great potential for supplying electricity in India,two projects with 150 kW & 200 kW have been installed in Himachal Pradesh & one with 300kW at Kakroi in Haryana.

Advantages of Hydro Energy

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It is inexpensive ,pollution free.It have low operating cost.It helps in to control floods.

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GEOTHERMAL ENERGY

Geothermal Energy

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As “Geo” means earth; “Thermal” means heat.

The heat inside the earth, under favourable conditions, can be utilised as a source of energy, this is called geothermal energy.

In other words “the heat energy from hot rocks present inside the earth”.

Harnessing Of Geothermal Energy

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In some geological regions of the Earth,the underground water comes in contact with hot spots and changes into steam. The steam so formed ,gets trapped in between the underground rocks and gets compressed to very,very high pressure.

This steam is extracted from the surface by sinking pipes from the surface,which is used in running turbines connected to the generator,which produces electricity.

Potential Of Geothermal Energy

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Geothermal Energy is the newest among all so it does not have any cotribution of power generation in India

But in some of the parts of world it geologically exists in present in US,Chile,Iceland,New Zealand.

Iceland produces 170MW of energy.Presently 8000MW of global capacity is

operational.

Advantages Of Geothermal Energy

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It is stable and most reliable source of energy as it is not affected by weather or seasonal changes.

Energy emission is much lesser as compared to others.

Growth Of Renewables In Few Years

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0

200

400

600

800

1000

1200

1400

2007 2008 2009

Hydro Energy

Solar Energy

Bio Fuel

Wind Energy

Need To Promote Renewables

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Renewables provide an enormous opportunity for India,to not only meet its energy needs but also to reap the social & environmental benefits.

Local environmental benefits such as land reclamation and pollution abatment

Global environmental benefits such as reduction in greenhouse gasses emission.

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THANK YOU