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Solar Power Plantspursuit of purest form of energy

by Saurabh kr Gautam

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contents

Introduction

Conversion techniques

Energy storage methods

Economics involved

Major solar power plants in the world

Advantages

Scope in future

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INTRODUCTION

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The sun is humanitys oldest energysource, and scientists and engineers havelong sought to harness the power ofsunlight for a wide range of heating,

lighting, and industrial tasks. Every childknows that focused sunlight is hot enoughto set things afire.

Engineers and scientists know that every

square meter of the Earth receives 1kilowatt of thermal energy when the sun isoverhead.

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HISTORICAL BACKGROUND

Gathering and converting thisenergy into usable form has been exploredsince burning mirrors were first used inChina at about 700 BC for ignition of

firewood.

Leonardo da Vincis notebooks containdesigns for solar concentrators

Intensive experimentation took placeduring the 18th and 19th centuriestowards building practical engines powered

by the sun.

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Conversion techniques

All solar thermal systems capture theenergy of the sun by absorbing lightas heat. There are two main energy

conversion techniques employed

1. Solar thermal power systems

2. Photovoltaic solar power systems

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Solar thermal power systems

focus sunlight, usually with mirrors,to heat a fluid to high temperaturesand drive an engine

These are used for large powerplants

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Photovoltaic power plants

Photovoltaics is a method of generatingelectrical power by converting solarradiation into direct current electricity

using semiconductors that exhibitthe photovoltaic effect.

Materials presently used for photovoltaicsinclude monocrystalline silicon,

polycrystalline silicon, amorphoussilicon, cadmium telluride, and copperindium gallium selenide /sulfide.

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Energy storage methods

Cost 4 times of the conventional coalmethod

CSP (concentrated solar power)

technology is price compatible withconventional methods

A 1000 Megawatt CSP facility

requires 6000 acres of land Government incentive for bio friendly

technology

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Energy storage methods

Solar energy can be stored at hightemperatures using molten salts

Use of rechargable batteries

Pumped-storage hydroelectricitystores energy in the form of waterpumped when surplus electricity isavailable

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Major power plants

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Advantages

Eco friendly

Never ending source of power

Economical in the long run Available for every country in the

world

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CHALLENGES

Cost cutting in installation

Better storage alternatives

More compact versions Development of better photovoltaic

materials

Improvement of efficiency

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Future scope

Growing technological knowledge

Amalgamation of many eco friendlytechniques

Positive attitude of governments

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THANK YOU