Geothermal power plants tap into the Earth's natural heat to generate electricity. They have three main components: production wells that bring up hot water or steam, turbines that convert thermal energy into mechanical energy, and generators that produce electricity. There are three types of geothermal power plants - dry steam, flash steam, and binary cycle - that differ based on the temperature of the geothermal reservoir and conversion process used. Geothermal energy has advantages like low greenhouse gas emissions and small land use footprint. While construction can cause noise pollution, overall environmental impacts are minor compared to other energy sources. Geothermal power has significant untapped potential if deep geothermal resources can be developed further in an economically viable way.
Geothermal power plant and its types
How it Works
Advantages of geothermal Powerplant
Types of geothermal Power Plant
Components used in a geothermal Power Plant
Summary
Geothermal power plant and its types
How it Works
Advantages of geothermal Powerplant
Types of geothermal Power Plant
Components used in a geothermal Power Plant
Summary
Geothermal Energy Resources or Geothermal power plantTesfaye Birara
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geothermal energy .the slides cover every tiny information about geothermal energy .it will give an overall picture of how geothermal energy plays an vital role in our life .how it all originated .its history .the solar water heater and all.it also show shows its importance in future.
INTRODUCTION TO GEOTHERMAL ENERGY
SOURCES OF GEOTHERMAL ENERGY
ROLE OF THERMODYNAMICS IN GEOTHERMAL POWER-PLANT
TYPES OF GEOTHERMAL POWER-PLANTS AND THEIR WORKING
DIRECT USE OF GEOTHERMAL ENERGY
ADVANTAGES AND DISADVANTAGES OF GEOTHERMAL ENERGY
This is the presentation about the Geothermal energy evolving in the world. It describes about different technology and use of it. It is beneficial for students to present this topic in their academic institutions. Also they will get brief knowledge about the geothermal energy from renewable energy.
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Energy conversion is the process of changing one form of energy into another, a fundamental capability that enables modern civilization to function. It can occur in various ways, from converting the kinetic energy of wind into mechanical power through windmills to transforming solar energy into electrical energy in solar panels. This transformation is essential not just for daily usage but also for harnessing and utilizing natural resources more efficiently. In the context of rural electrification, this process plays a critical role. By converting available local energy resources into electricity, rural communities can access a stable and reliable power supply. This not only improves the quality of life but also supports economic development by powering homes, schools, businesses, and healthcare facilities. Consequently, energy conversion facilitates the broader goal of rural electrification, demonstrating the interconnection between technological innovation and societal advancement.
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SOURCES OF GEOTHERMAL ENERGY
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TYPES OF GEOTHERMAL POWER-PLANTS AND THEIR WORKING
DIRECT USE OF GEOTHERMAL ENERGY
ADVANTAGES AND DISADVANTAGES OF GEOTHERMAL ENERGY
This is the presentation about the Geothermal energy evolving in the world. It describes about different technology and use of it. It is beneficial for students to present this topic in their academic institutions. Also they will get brief knowledge about the geothermal energy from renewable energy.
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3. Introduction
■ Our earth was a burning planet billions of years ago, Still
earth core temperature is above 5000C.
■ Geo means earth andThermal means heat ,Geothermal
means earth’s heat
■ Geothermal energy is the energy contained as heat in the
earth’s interior.
4. Geothermal energy is energy extracted from the heat stored
in the earth.
Geothermal energy is derived from within the earth's tectonic
activity that occurred since the planet was created. It also
comes from solar thermal absorbed by the earth's surface.
5. Main Components of a Geothermal
Power Plant
■ ProductionWell
■ Separator
■ Heat Exchanger
■ SteamTurbine
■ Condenser
■ Generator
■ InjectionWell
6. ProductionWell
■ Source of steam
■ Depth 3 km to 10 km
■ Similar to production well
of an oil rig
■ Wells may be located as far
as 10 km to 14 km from
power plant
■ Steam can be moist or dry,
Moist steam passes
through separator
■ Water or brine is reinjected
through injection well
7. Separator
■ Steam contains non
condensable gases
including Hydrogen
sulphide
■ Separator are used for the
purpose to remove these
gases
■ 2 phase and 3 phase
separators are used
according to requirement
■ Separators are vertically
horizontally designed
8. SteamTurbine
■ Specially designed steam turbine are used
for geothermal power plants
■ Steam can be corrosive due to many non
condensable gases e.g. Hydrogen sulphide
■ Toprotect rotor blades and nozzles from corrosion
special coatings and materials are used
■ The generation and transmission side of
geothermal power plants is similar to conventional
power plants
9. Condenser
■ Steam condensed at a vacuum at the
turbine exit
■ Most plants use direct contact
condensers that uses water itself as
the cooling media.
10. InjectionWell
■ The excess condensate and the brine from
the separator returns back to the
underground thermal reservoir,
■ Reinjection wells are located in appropriate
places
■ Some reservoirs can give outputs for years
with out reinjection
11. How ItWorks
■ Large holes have to be dug into the earth until a geothermal hotspot is found.
■ Pipes are inserted inside these holes through which water is sent and steam
output is obtained.
■ The production involves two process
1) ConvertingGeothermal energy into Mechanical energy
2) Converting Mechanical Energy into Electrical Energy
■ The success of the energy production depends on the temperature of the plant
which depends on the temperature of the rocks in earth.
■ The water is sent through the injection well and reaches the rocks and then hot
water comes from the production well.
12. ■ Due to the high pressure when it reaches the topmost of the earth surface it is
converted into steam.
■ The separator is the place where steam that comes from the earth is made
clean by removing the brine and dirt so that they do not damage the turbine
blades.
■ The high pressure and low pressure steam runs the turbine.
■ The generator is coupled with turbine to produce electricity.
■ The condenser is a phase changer where the steam output of the turbine is
given to the condenser and gets converted to hot water.
■ This hot water is then sent to the cooling tower where it loses it heat and then
sent to the geothermal reservoir for further production of steam.
14. Types of Geothermal Power Plants
There are three different types of Geothermal power plants
system designs :
■ DrySteam Power Plants
■ Flash / Steam Plants
■ Binary cycle power plant
15. Dry Steam Power Plant
A power plant where steam is released from the pressure of a deep reservoir,
through a rock catcher, and then past the power generator turbines.
■ “Dry” steam extracted from natural reservoir
– 180-225 ºC ( 356-437 ºF)
– 4-8 MPa (580-1160 psi)
■ Steam is used to drive a turbo-generator
■ Steam is condensed and pumped back into the ground
■ Can achieve 1 kWh per 6.5 kg of steam
– A 55 MW plant requires 100 kg/s of steam
17. Flash or Steam plants
■ A power plant where water is pumped under great
pressure to the surface.When it surfaces, the pressure
is reduced and as a result some of the water changes
to steam.This creates a blast of steam.The water is
then returned to the earth to be heated up by
geothermal rocks again.
18. Flash or Steam plants
■ Steam with water extracted from ground
■ Pressure of mixture drops at surface and more water “flashes”
to steam
■ Steam separated from water
■ Steam drives a turbine
■ Turbine drives an electric generator
■ Generate between 5 and 100 MW
■ Use 6 to 9 tones of steam per hour
20. Binary Cycle Power Plant
■ A power plant where warm geothermal water is
pumped to the surface and passed through a heat
exchanger that contains a special fluid that boils the
water.The heat from the water makes this secondary
fluid flash into vapor.The newly created vapor spins
the turbines, while the cooled steam is injected back
into the earth.
21. Binary Cycle Power Plant
■ Low temps – 100o and 150oC
■ Use heat to vaporize organic
liquid
– E.g., iso-butane, iso-pentane
■ Use vapor to drive turbine
– Causes vapor to condense
– Recycle continuously
■ Typically 7 to 12 % efficient
■ 0.1 – 40 MW units common
23. Advantages of Geothermal Energy
■ No chance of contamination from solid discharge.
■ Geothermal fluids contains less harmful greenhouse
gases.
■ No NitrogenOxide andSulfur Dioxide. Less acid rain.
■ Binary Plants have noCarbon Dioxide, however
others have 0.2lb/kW-h.
25. The Environmental Impacts
■ Low risks of water contamination and low
air pollution
■ Most of the major noise pollutions are
during construction only
■ Seismicity due to EGS operation is minor
and not definite
26. Landscape Impact and Land Use
■ Requires relatively less
land.
■ Less environmental
alterations and adverse
effects.
■ Produces more power per
surface acre compared to
nuclear and coal.
27. Thermal Pollution
■ It is one of the biggest concerns due
to considerable loss of thermal heat.
■ Taller cooling towers are needed to
contain the waste heat.
28. Noise Pollution
■ Noise does occur during initial
construction and drilling.
■ Noise is minimum.
0
20
40
60
80
100
120
Source(dB)
Air
Drilling
Mud
Drilling
Well
Discharge
Well
Testing
Heavy
Machinery
29. Immense potential
■ Geothermal Energy is renewable,
the available resource is large
– 2,000 zettajoules available for extraction.
(MIT) Enough to power human civilization
for thousands of years
– 100,000 MWe is projected to be extracted
in the next 50 years
30. Summary
■ Further development of DeepGeothermal Energy should be
highly considered because of its
– Potential to allow new access to large resources
– Environmentally friendly traits
– Competitive costs in the long run
– Ability to use existing technologies to begin extraction soon