solar energy and how to help poor with sun energy ppt

TOPIC:

SOLAR ENERGY IN INDIA –HOW TO HELP POOR WITH SUN

POWER

SELF STUDY COURSE-1

(An Autonomous institute)

Department of Electrical and Electronics Engineering,AITAM,Tekkali

Solar energy


Solar energy in india ?

What is solar energy ????

Energy derived from the sun's radiation. Solar energy is used on Earth in various ways. It is used as a passive source of energy,for example, in the form of sunlight that comes through a window andheats up a room, or as an active source, as in the conversion ofsunlight to electrical energy in solar cells. Earth receives solar energy at

the rate of approximately 1,73,000 TW.

Definition:


Solar energy in INDIA ????


Are Solar and New Energy Sources the answer toIndia’s energy challenges?Their potential is undeniable: in five years they could account for18% of capacity—if only about 6% of generationis achieved. Wind and solar could contribute much of this alone. Butscaling up renewable generation means resolving fundamentalchallenges of supply volatility, grid integration, geographicdispersion and un competitiveness.

Someone must bear the higher costs of renewable power sources.While the central government has developed several policies to thisend, all states expect Gujarat* and some consumers might be lesseager to finance further renewable development.


"India is the fifth largest consumer of energy in the world, and it is projected to

surpass Japan and Russia to become the world’s third biggest energy consumer by

2030. At the same time, the country is facing an acute energy scarcity which is

hampering its industrial growth and economic progress.

With mounting concerns on global warming, climate change and the looming

threat of fossil resource scarcity, India is increasingly looking towards renewable

energy to power itself. A fundamental shift is already happening in many parts of

the country in the context of renewable energy and clean technology. EAI is one of

the leading support resources which is catalyzing and facilitating this

fundamental shift.


How solar energy help to poor people……


Solar technology isn't new. Its history spans from 7th B.C to

today.

In the beginning people use the solar for make a fire by using

magnifying glasses.

In earlier 17th century Romans are invented the new thing to

burn the wood in other ships by bronze sheets.

Some facts on solar energy


In 1839 French scientist Edmond Becquerel

discovers the photovoltaic effect

In 1954 photovoltaic technology is born in USA

when develop silicon solar cell at bell labs, this

solar cell has an efficiency of 4%.


Materials for Solar cell

Solar cells are composed of varioussemiconducting materials

1. Crystalline silicon

2. Cadmium telluride

3. Copper indium diselenide

4. Gallium arsenide

5. Indium phosphide

6. Zinc sulphide


Over 95% of all the solar cells produced worldwide are

composed of the semiconductor material Silicon (Si). As

the second most abundant element in earth`s crust,

silicon has the advantage, of being available in sufficient

quantities.

To produce a solar cell, the semiconductor is

contaminated or "doped".

"Doping" is the intentional introduction of chemical

elements into the semiconductor.


3. electron-hole formation

Photovoltaic energy conversion relies on the number ofphotons strikes on the earth. (photon is a flux of lightparticles)

• On a clear day, about 4.4 x 1017 photons strike a squarecentimeter of the Earth's surface every second.

• Only some of these photons - those with energy inexcess of the band gap - can be converted intoelectricity by the solar cell.

• When such photon enters the semiconductor, it may beabsorbed and promote an electron from the valenceband to the conduction band.


Therefore, a vacant is created in the valence

band and it is called hole.

Now, the electron in the conduction band and

hole in valence band combine together and

forms electron-hole pairs.


Disadvantages:

1.Soar power can be obtained in night time

2.Soar cells (or) solar panels are very expensive

3.Energy has not be stored in batteries

4.Air pollution and whether can affect the productionof electricity

5.They need large are of land to produce moreefficient power supply


Three main uses:

• Heating of water

• Solar thermal power

stations

• Photovoltaic panels

Uses for Solar Energy


How it is used to poor people

Availability of solar energy is more

When compare to other plants the solar power system is

possible to install for our required power, so the cost is also

reasonable but not for poor if the govt gives offer to promote

solar power then poor and farmer will gain a lot frm sun power

There is no running costs in this plant for small requirements

(i.e. house loads) so, our installed cost may cover in the span

of 5 to 7 years


This session therefore is meant to discuss the

development of alternative technologies, its

overview and issues and

challenges facing the renewable energy power

sector, in hopes that it will encourage even

more rapid and

extensive development of the renewable energy

resources on the Indian subcontinent

Conclusion:


References:www.seminaronly.com

www.wikipedia.com


http://www.seminaronly.com/

http://www.wikipedia.com/