geo-thermal power plant
TRANSCRIPT
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GEOTHERMAL POWER PLANT
BY:
MOHSIN RAFIQ EE306712AZWAR SAEED KHAN EE306731
FAIZ ULLAH BAJWA EE306727
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GEOTHERMAL ENERGY
Geothermal energy is power extracted from
heat stored in the earth. This geothermal
energy originates from the original formation
of the planet, from radioactive decay of
minerals, and from solar energy absorbed at
the surface.
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HISTORY
The ancient Romans used hot springs to heat
their baths and homes. This water was also
used for medical and cooking purposes.
18th century near Pisa, Italy. Geothermal
energy is used to extract boric acid through
the use of steam.
1904 in Italy the steam was successfully used
to generate power for the first time
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HISTORY
1922 the U.S.A's first geothermal power plant
went down in history producing 250 kilowatts
which could light the streets and buildings in
the area.
1960 large scale industrial geothermal energy
power plant was constructed in the U.S.A and
produces 11 megawatts of electricity.
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GEOTHERMAL POWER PLANT
A geothermal power plant uses geothermal
fluids heat to generate power.
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Geothermal Fluids
Geothermal fluids originate from a
combination of deeply circulated subsurface
water and magmatic/volcanic emanations.
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Geothermal Fluids
Geothermal fluid is brought up to the surface
of the earth by production well
As the fluid is in superheated form it comesupward naturally by high pressure
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TYPES OF GEOTHERMAL PLANT
Dry steam Geothermal Plant
Flash steam Geothermal Plant
Binary cycle Geothermal Plant
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DRY STEAM GEOTHERMAL PLANT
These were the first type of plants created. They use underground steam to directly
turn the turbines.
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FLASH STEAM GEOTHERMAL PLANT
These are the most common plants. These systems pull deep, high pressured hot waterthat reaches temperatures of 3600F or more to the surface. This water is transported to
low pressure chambers, and the resulting steam drives the turbines. The remaining
water and steam are then injected back into the source from which they were taken.
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BINARY CYCLE GEOTHERMAL PLANT
This system passes moderately hot geothermal water past a liquid, usually anorganic fluid, that has a lower boiling point. The resulting steam from the organic
liquid drives the turbines. This process does not produce any emissions and the
water temperature needed for the water is lower than that needed in the Flash
Steam Plants (2500F 3600F).
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APPLICATION
FangLocation: ThailandConfiguration: 300 kW
Operation: 1989
Heber Second ImperialLocation: USAConfiguration: 48 MW
Operation: 1993
Raft RiverLocation: USA
Configuration: 13 MWOperation: 2008
Bagnore-3Location: ItalyConfiguration: 20 MW
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GEOTHERMAL DISADVANTAGES
There is the fear of noise pollution during the drilling of wells.
Not available in many locations
Power plants that do not inject the cooled water back into the
ground can release H2S, the rotten eggs gas. This gas cancause problems if large quantities escape because inhaling too
much is fatal.
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GEOTHERMAL ADVANTAGES
Useful minerals, such as zinc and silica, can be extracted fromunderground water.
This will create jobs, a better global trading position and lessreliance on oil producing countries.
In large plants the cost is 4-8 cents per kilowatt hour. This costis almost competitive with conventional energy sources
Geothermal plants do not require a lot of land, 400m2 canproduce a gigawatt of energy over 30 years.
Electricity generated by geothermal plants saves 83.3 millionbarrels of fuel each year from being burned world wide. Thisprevents 40.2 million tons of CO2 from being emitted into theatmosphere.