Renewable energy is generally defined as energy that comes from resources which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.[2] Renewable energy replaces conventional fuels in four distinct areas: electricity generation, air and water heating/cooling, motor fuels, and rural (off-grid) energy services. Based on REN21's 2014 report, renewables contributed 19 percent to our global energy consumption and 22 percent to our electricity generation in 2012 and 2013, respectively. This energy consumption is divided as 9% coming from traditional biomass, 4.2% as heat energy (non-biomass), 3.8% hydro electricity and 2% is electricity from wind, solar, geothermal, and biomass. Worldwide investments in renewable technologies amounted to more than US$214 billion in 2013, with countries like China and the United States heavily investing in wind, hydro, solar and biofuels.

1. Non conventional energy sources
(GEO THERMAL, SOLAR, WIND)
PRESENTED BY
M. Shivani Reddy

2. INTRODUCTION
Energy sources
→Conventional
→Non conventional
Geo thermal energy
Solar energy
Wind energy
Conclusion

3. ENERGY SOURCES
Energy sources can be defined as sources which provide a
net supply of energy.
There are 2 types of energy sources
conventional energy sources
non conventional energy sources.

4. CONVENTIONAL ENERGY SOURCES
These sources of energy are non renewable.
Example Fossil fuels, Nuclear elements, etc
Conventional sources of energy have a limited supply.
In addition, burning fossil fuels release significant
amounts of greenhouse gases and contribute to acid rain.

5. NON CONVENTIONAL ENERGY SOURCES
These sources are renewable.
These are still undergoing development.
 And are also expensive.
They include Geo thermal power, solar power and
wind power.
These sources are eco friendly.

6. TYPES OF NON CONVENTIONAL
ENERGY SOURCES
Geothermal Energy
Solar Energy
Wind Energy
Biomass energy
Tidal Energy
Etc…
Different types of non conventional energy sources are

7. Different types of non conventional energy sources are
explained as follows.

8.  Geothermal power is energy derived from heat that comes out of
the earth.
 Hot rocks underground heat, water to produce steam.
 We drill holes down to the hot region steam comes up is purified and
used to drive turbines which drive electric generators.

9. TEN-YEAR UNAVAILABILITYTEN-YEAR UNAVAILABILITY
The Advantages of Geothermal Energy
There are no by products which are harmful to the
environment.
There is also no consumption of any type of fossil
fuels.
 Another advantage is that the power plants do
not have to be huge.

10. The Disadvantages of Geothermal
Energy
 The area where a geothermal energy power plant would
be built should consist of those suitable hot rocks at just
the right depth for drilling.
 It is important to take care of a geothermal site because
if the holes were drilled improperly, then potentially
harmful minerals and gas could escape from under
ground.
 Pollution may occur due to improper drilling at
geothermal stations.

11. SOLAR POWER:
Solar power is power derived from the light and
heat of the sun.
One way of capturing this energy is through the
use of photovoltaic cells.
 A solar cell or photovoltaic cell (PV), is a device
that converts light into electric current using the
photoelectric effect.

12. Solar energy is collected by the small solar panels .
And it is converted to the electricity.
The Solar electricity is usually collected in a storage
battery.

13. ADVANTAGES:
If we consider solar energy over that of oil, Solar
cells are totally silent.
lack of pollution given off by solar panels when
generating electricity.
Solar power bring electricity to some of the most
remote places on earth also.

14. DISADVANTAGES:
The initial cost is high.
Solar power cannot be created at
night.

15. WIND POWER:
Wind has kinetic energy that can turn turbines and be
converted to usable power.
Wind power is one of the most cost-efficient forms of non-
conventional energy.
Wind power is captured by wind turbines.
Wind can be used to spin turbines that add fuel to batteries.

16. Some countries like India, Germany and China are
lucky to have rather consistent prevailing winds, which
makes the possibility to utilize wind power on a large
scale much more feasible than it is for other countries.

17. ADVANTAGES:
Wind energy is friendly to the surrounding
environment, as no fossil fuels are burnt to
generate electricity from wind energy.
Wind turbines take up less space than the average
power station.
Another advantage of wind energy is that when
combined with solar electricity, this to provide a
steady, reliable supply of electricity.

18.  Disadvantages:
 In many areas, the winds strength is too low
to support a wind turbine or wind farm.
 The noise pollution from commercial wind
turbines is sometimes similar to a small jet
engine

19. In addition to these there is another energy called bio mass
energy which involves burning of plants and other organic
material .Due to combustion carbon dioxide is released which
in turn results in green house effect .But however all the above
stated powers play a very important role in determining the
economic growth of a country.