The document discusses solar power as a renewable energy source. It notes that fossil fuel reserves are dwindling and will be depleted within 120-150 years. Solar energy has significant potential as a power source given the abundant solar radiation received by the Earth each day. The document outlines average solar insolation levels globally, the efficiency and lifespan of solar panels, and recent advances in solar technology. It concludes that accelerating the use of solar power generation is important given the looming energy crisis posed by finite fossil fuel reserves.

1. SOLAR POWER
THE GREEN POWER…
-BY
1
SREEKANTH SHASTRY V
JSSATE

2. CONTENTS
2
 OBJECTIVES
 INTRODUCTION
 A LOOK AT WORLDS ENERGY RESOURCES CONSUMPTION
 REMAINING RESERVES
 WHY FOCUS ON SOLAR ENERGY
 AVERAGE INSOLATION ON THE GLOBE
 EFFICIENCY
 LIFESPAN
 RECENT ADVANCES
 ADVANTAGES & LIMITATIONS
 CONCLUSION

3. OBJECTIVES
3
 To understand the potential & need for solar energy as
a solution for the upcoming concerns of fossil fuels &
global warming.
 To visualize solar energy as a major power source in the
future.

4. INTRODUCTION
4
 The word Photovoltaic is a combination of the Greek word
for Light and the name of the physicist Allesandro Volta.
 Photovoltaic’s (PV) is a method of generating electrical
power by converting solar radiation into direct
current electricity using semiconductors that exhibit the
photovoltaic effect.

5. A LOOK AT WORLDS
ENERGY RESOURCES CONSUMPTION
5

6. REMAINING RESERVES AS OF 2009
6

7. CONTD…
7
 In 2008, total worldwide energy consumption was
474 exajoules with 80 to 90 percent derived from the
combustion of fossil fuels.
 In 2009, world energy consumption decreased for the
first time in 30 years (-1.1%) or 130 Mtoe (Megaton
oil equivalent), as a result of the financial and
economic crisis

8. WHY FOCUS ON SOLAR ENERGY?
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 The world has a renewable usable energy flux that
exceeds 120 PW a day Or 3.8 YJ/yr dwarfing all non-
renewable resources.
 It has been estimated that the extraction of fossil fuels
will be at peak by 2020.
 The demand for fossil fuels gets higher & higher making
generation of power costlier.

9. Contd…
9
 At this rate, The fossil fuels will get depleted in nearly 120
to 150 years.
 Major implementations of solar power from now on can
meet the power demand with less consumption of fossil
fuels.
 Global warming is still an issue. Usage of fossil fuels as a
major source is not going to help against global warming

10. AVERAGE INSOLATION ON THE GLOBE
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11. EFFICIENCY
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 The efficiency of RSLE‘s new thin film solar cell exceeds
35%.
 A multi-junction solar cell reached 40.7 % efficiency level.

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13. LIFESPAN
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 The life of a solar panel depends upon various
parameters.
- Materials used
- Amount of solar insolation received
 The range of lifespan varies from 20 to 30 years
with a efficiency drop up to 25% over the rated
efficiency.

14. RECENT ADVANCES
14
 Silicon wafers
 Thin film pv’s
 Multi-junction pv’s
 Multi-layered pv’s
 Sun Tracking Systems
 Maximum Power Point Tracking (MPPT) controllers

15. ADVANTAGES
15
 Solar energy is a renewable energy source
 It is highly reliable & is available abundantly.
 Other renewable energy sources become negligible.
 Solar cells require very less maintenance and they have
a long life too.

16. Contd…
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 Running costs are very low.
 Solar cells are very silent in their working.
 Photovoltaic's have zero emissions, making it clean &
green energy.
 Solar panels have materials that the manufacturer will
take them back at their own expense for recycling.

17. LIMITATIONS
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 Solar energy is not available at night, Storage options may
cost high.
 At polar & surrounding regions the density of radiation is
very less.
 Initial cost involved in photovoltaic's is high, which is a
major concern.
 Photovoltaic's are not highly feasible for domestic
purposes.

18. Contd…
18
 Its does not have a short term payback period.
 Solar panels just doesn't come like that. They include
emissions during manufacturing stage.
 They cannot be completely recycled.

19. CONCLUSION
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 Its time to accelerate the power generation with
photovoltaic’s.
 The world is already feeling the crisis heat of fossil
fuels.
 In future, we may have the much more worst scenarios
dealing with fossil fuels.
 So, Solar energy is a great option which is renewable
and will be always present on the globe.

20. References
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 http://www.renewableenergyworld.com
 http://poweredbysolarpanels.com
 http://www.greenoptimistic.com
 http://www.solarpanelsplus.com
 http://www.solarpower2day.net
 http://www.sciencebuddies.org
 http://www.solarserver.com
 http://en.wikipedia.org

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