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
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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…
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 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
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 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…
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 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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