I am Amar Bariya and I am presenting here a presentation on simple introduction of Solar energy. And you can also use this knowledge in your day to day life else in your educational knowledge. It's a very vast area and just boost up your knowledge in renewable energy harvesting sector.

1. Webinar
on
Solar Energy Harvesting
Prepared By :
Amar Bariya
(Gandhinagar Institute
Of Technology)

2. Content
• What is solar energy?
• Why do we need solar energy?
• History of solar energy.
• Classification of solar energy.
• Pros and cons of solar energy.
• Importance of solar energy.
• Use of nanotechnology.
• Material list.
• Applications.

3. What is solar energy?
• Like air and water, the sun is one of the earth’s
life support system, providing light and heat.
• Solar energy is a form of energy relives on the
nuclear fusion power from the core of the sun.
• Solar energy is nothing but it’s converted in to
light in to usable energy, such as electricity.

4. Why do we need solar energy?
• In the whole world coal
deposits will deplete
within next 200-300 years
and petroleum deposits
will deplete in next few
decades at the present rate
of consumption.

5. • The huge consumption of fossil fuels has caused
many damages to the environment.
• To reduce these damages, we need to concentrate
on renewable energy resources, and solar energy
is the good option.
• The most advantage of solar energy is that this is
distributed over a wide graphical area.

6. • Average over the entire earth = 164 watts per
square meter a 24 hour day so, the entire planet
receives 84 TW watts of power.
• Our current world wide consumption is
approximately 12 TW.

7. History of solar energy
Year Inventor Invention
1839 Edmund Bacquerel Observed materials which turn light in to
energy.
1860 Auguste Mouchout Direct conversion of solar radiation in to
mechanical power.
1867-78 William Adams Powered a 2.5 HP steam engine through solar
energy .
1895 Aubrey Eneas First solar energy company.
1904 Henry Willsie 1ST to use power at night after generating in
during the day.
1954 Calvin Fuller, Gerald
pearson
and Dayl Chaplin
Used silicon as a semiconductor with
efficiency of 6%.
1970 Zhores Alferov First highly effective hetro structure solar cell are
created
1988 Michel Gratzel First Dye-sensitized solar cell is created.
2009 Miyasaka First incorporation of perovskite material in
to a solar cell.

8. Classification of solar energy

9. Passive solar energy
• Passive solar energy is a method in which solar
energy is harnessed in its direct form without using
any mechanical device.
• Drying cloths in day light is an example of using
solar energy passively.
Passive solar coolingDay lightening Passive solar heating

10. Active solar energy
• The active solar energy employs mechanical or
electrical equipment for functioning and
increase system.
• As an example water pumps are used to
circulate water through the active solar energy
water heating system.
• Some application of active solar energy which
can be very helpful to us.

11. Active solar space heating
Active solar pool heating
Active solar water heating

12. Types of active solar energy
1) Solar thermal energy
• Solar thermal power (electricity) generation
systems collect and concentrate sunlight to
produce the high temperature heat needed to
generate electricity.
• All solar thermal power systems have solar
energy collectors with two main components:
a) Reflectors.
b) Receiver.

13. • In most types of systems, a heat transfer fluid is
heated and circulated in the receiver and used to
produce steam.
• The steam is converted into mechanical energy in
a turbine, which powers a generator to produce
electricity.

14. 2) Photovoltaic solar cell energy
• Photovoltaic solar cell consists of two or more
thin layers of semiconducting materials, most
commonly silicon.
• It is an electrical device that converts the energy
of light directly in to electricity by the
photovoltaic effect.
• Photovoltaic is derived from the words “Photo”
with the Greek meaning light and “Voltaic”
meaning voltage.
• The basic operation of a semi conductor
photovoltaic cell involves two steps:

15. a) Absorption of light which leads to the
generation of electron hole pairs within the
photovoltaic material.
b) Separation of these electron hole pairs giving
rise to an electrical current which flows in an
external circuit.

16. Advantages of solar energy
• After the initial investment has been
recovered, the energy from the sun is
practically free.
• Financial helps are available from the
government.
• Solar energy is clean and renewable.
• Also energy is sustainable and helping the
protect our environment.

17. • Once installed, there are no recurring costs.
• They operate silently.
Disadvantages of solar energy
• The initial cost is high.
• For installation requires large area.
(To achieve a good level of efficiency)
• It is very difficult to maintain.

18. Importance of solar energy
Pollution fromvehicles
Pollution from fossilfuels
Pollution from forestfiring

19. • The following table shows the amount of carbon
and sulphur deposited in the atmosphere.
Sr. No. Activity Amount of
deposited in the
atmosphere
01 Vehicle, water product,
etc.
8 Billion tones
02 Fossil fuels 6.5 Million tones
03 Deforestation and forest
firing.
1.5 Million tones

20. Installed capacity of solar energy in
India

21. Use of nanotechnology
• Nanotechnology is a part of science and technology
about the control of matter on the atomic and
molecular scale.
• Nanotechnology operates on atoms and molecules on
the nano-meter scale, and by controlling the arrays
and structure of substances, it exploits the unique
characteristics of nano-size particles to create new,
excellent characteristics of substances.
• Nanotechnology is a powerful tool for a host of the
solar system in support of efficient sustainable
energy conversion, storage and conservation of terms
of.

22. • Tailoring the interaction of light with materials and
enabling the processing of low cost semiconductors
into devices such as photovoltaic's.
• Making more efficient photo catalysts for converting
sunlight in to chemical fuels.
• Developing new materials and membranes for the
separations needed in many energy applications.
• Converting chemical fuels into electrical energy,
improving energy and power density in batteries.

23. Materials list
• Silicon
• Lithium graphite
• Graphite
• Graphite-oxide
• Cadmium telluride
• Copper indium gallium di-selenide
• Copper indium di-selenide
• Phosphorus boron
• Titanium oxide

24. Application of solar energy

25. Thank you so much for listening me.
Do you have any questions?
Email ID :
amarbariya1998@yahoo.com