2.  The word geothermal comes from the
Greek words geo (earth) and therme
(heat). So , geothermal energy is heat
from within the earth.
 Geothermal energy is a renewable
energy source because the heat is
continuously produced inside the earth.

3.  Agriculture
 Industrial and Commercial
 Residential

4.  Greenhouses and aquaculture (fish
farming) are the two main agricultural uses
for geothermal energy.
 Greenhouses typically use resources
between 70°F and 220°F. Fish farms use
even lower temperature resources of
between 60°F and 90°F.
 At the Land Survey Nursery in Taupo,
greenhouses are heated by geothermal
steam and soil is sterilized (pasteurized) at
140°F (60°C) to kill insects, fungus, worms,
and some bacteria.

5.  Most greenhouse operators estimate that using
geothermal resources instead of traditional
energy sources saves about 80% of fuel costs —
about 5% to 8% of total operating costs.
 In addition, geothermal resources can be used
to pasteurize milk and dehydrate fruit and
vegetables.
 The relatively rural location of most
geothermal resources also offers advantages,
including clean air, clean water and, often,
low taxes.
 Other applications enjoying success with
geothermal energy include the production of
green-blue algae spirulina, in the fish farms of,
and in drying tomatoes.

6.  The annual energy use is 20,661 TJ/year.
 A total of 30 countries
report geothermal greenhouse heating,
the leading countries being Georgia,
Russia, Turkey, Hungary, China and Italy.

7.  Industrial applications include
• food dehydration
• laundries
• Gold and silver mining
• milk pasteurizing
• spas and others.
 Dehydration, or the drying of vegetable
and fruit products, is the most common
industrial use of geothermal energy.

8.  In the United States, gold is extracted using
a process called heap leaching in which a
cyanide solution is sprayed over ore.
 Using the heat of geothermal resources
allows the process to continue even in the
winter, when the ore would otherwise be
frozen solid.
 This method of mineral extraction, used
primarily in Nevada, has resulted in higher
rates of gold recovery.
 The earliest commercial use of geothermal
energy was for swimming pools and spas.
 In 1990, 218 resorts were using geothermal
hot water.

9.  Geothermal renewable energy can be
used to provide heat for all types of
buildings, from homes to businesses to
farms, barns, and other types of
buildings.
 Using this energy does not just provide
heat, it is a complete temperature
control system which can help cool your
home as well.

10.  Geothermaly heated water has been
piped under sidewalks and streets to
prevent freezing in the winter and has been
used to heat both commercial and
residential buildings.

11.  A geothermal power station can provide a
large amount of electricity, with many
benefits that using fossil fuels for electricity
generation do not offer.
 Geothermal power generation is very
clean, because it uses the heat and steam
trapped in the earth to produce electricity.
 There are no harmful gas emissions or high
carbon levels, and these power generation
plants do not contribute to air pollution.

13.  In India, Northwestern Himalayas and the western coast
are considered geothermal areas.
 Nearly 400 low to medium enthalpy thermal springs exists
in India.
 The surface temperatures of these thermal springs vary
from 47 to 98 oC.
 Total power generating capacity of these provinces is
estimated to be of the order of 10,000 MW.
 Dehydration of agricultural produce and green house
cultivation (food processing and food production) are two
such industries to name, which can utilize this energy with
maximum profits.

14. Five biggest geothermal power
plant in world
Utah’s geothermal power
plant
 Utah in US also boasts of a
huge geothermal power
plant built by Raser
Technologies.
 The company complains
that this plant is 100% eco-
friendly because it is
completely emission free.
 The plant started its
operations in 2009 and it
produces 10MW of green
power.

15. 2. Harry Reid’s hybrid
solar-geothermal
power plant
 This solar-geothermal
power plant was
announced by
Nevada Senator in
2008 during the
National Clean Energy
Summit.
 it produces 24MW of
green power.

16. 3. Raser
Technologies’
120,000MW
geothermal power
plant
 On August 22, 2008,
Raser Technologies
announced its plan
to construct a large
geothermal power
plant in New
Mexico.
 This plant with an
output of
120,000MW.

17. 4. Ohaaki geothermal
power plant
 The plant located on
the banks of the
Waikato River is one
of its kinds in New
Zealand.
 The annual output of
this eco-friendly
power plant is around
400 GWh pa.

18. 5. Nesjavellir
Geothermal Power
Station
 Located in
Thingvellir, Iceland,
the installed
capacity of this
geothermal power
plant is 120 MW.
 This power plant
was commissioned
in May 1990 and it is
Iceland’s second
largest geothermal
power plant.

19.  http://ei.lehigh.edu/learners/energy/rea
dings/geothermal.pdf
 http://www.ei.lehigh.edu/eli/energy/reso
urces/readings/geothermal.pdf
 http://www.ga.gov.au/image_cache/G
A10661.pdf
 http://www.bionomicfuel.com/geoterm
al-energy-5-types-and-the-beneficial-
uses/

20. THANK YOU