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Group: Group: 1.Zainab Abd 2.Kaziwa Kwa 3.Aso ahmed 4.Alan qader 5.Mohamad chapok 6.Sangr sardar 7.karwan fatah 8.Farhad salh Names: Under the super Under the super vision of: vision of: Dr.Falak Dr.Falak

Presentation - Geothermal Energy

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Page 1: Presentation - Geothermal Energy

Group:Group:

1.Zainab Abd

2.Kaziwa Kwa

3.Aso ahmed

4.Alan qader

5.Mohamad chapok

6.Sangr sardar

7.karwan fatah

8.Farhad salh

Names:

Under the super vision of:Under the super vision of:

Dr.FalakDr.Falak

Page 2: Presentation - Geothermal Energy

outlineoutline

• Renewable Energy/definitionRenewable Energy/definition• What is geothermal EnergyWhat is geothermal Energy• Where Geothermal Energy comes fromWhere Geothermal Energy comes from• The Benefits of Geothermal powerThe Benefits of Geothermal power• The Cost to the EnvironmentThe Cost to the Environment• The Future of Geothermal PowerThe Future of Geothermal Power• Reasons to Support Geothermal EnergyReasons to Support Geothermal Energy

Page 3: Presentation - Geothermal Energy

Renewable Energy

Renewable Energy:Renewable Energy:Is any energy source that is naturally Is any energy source that is naturally

replenished,like that derived from:replenished,like that derived from:• SolarSolar• WindWind• BiomassBiomass• HydroelectricHydroelectric• GeothermalGeothermal

Page 4: Presentation - Geothermal Energy

What is geothermal energy?What is geothermal energy?Geothermal energy is the name given to the Geothermal energy is the name given to the

naturally occurring heat energy that is available naturally occurring heat energy that is available below the earth’s surface. (this name comes from below the earth’s surface. (this name comes from geo ,meaning earth, and thermal meaning heat) so geo ,meaning earth, and thermal meaning heat) so geothermal means earth-heat.geothermal means earth-heat.

Page 5: Presentation - Geothermal Energy

Where Geothermal energy comes from?Where Geothermal energy comes from?

The answer is the earth itself, the geothermal heat is The answer is the earth itself, the geothermal heat is produced by the core of the earth itself. You may produced by the core of the earth itself. You may not think that energy to be much when compared not think that energy to be much when compared to the sun but you would be wrong is some to the sun but you would be wrong is some aspects. The Earth’s core alone is 11,000 degrees. aspects. The Earth’s core alone is 11,000 degrees. That is hotter than the surface of the sun. The That is hotter than the surface of the sun. The Earth’s geothermal energy is created by the decay Earth’s geothermal energy is created by the decay of radioactive materials in the core and in the of radioactive materials in the core and in the surrounding layers of rock.surrounding layers of rock.

Page 6: Presentation - Geothermal Energy

Harnessing Geothermal energy/benefits

The heat energy transferred from the mantle to the The heat energy transferred from the mantle to the waters in the earth’s crust can be harnessed to waters in the earth’s crust can be harnessed to create electricity. This can happen in three create electricity. This can happen in three different ways. Dry steam reservoirs harness the different ways. Dry steam reservoirs harness the energy of geysers to produce electricity. Wet energy of geysers to produce electricity. Wet steam reservoirs use recycled water to make steam reservoirs use recycled water to make steam deep in the geothermal wells that are steam deep in the geothermal wells that are heated by the mantle of the earth. Hot water heated by the mantle of the earth. Hot water reservoirs create a supply of heated water from reservoirs create a supply of heated water from underground sources that can be used to heat underground sources that can be used to heat homes and businesses.homes and businesses.

Page 7: Presentation - Geothermal Energy

How is heat energy accessed?How is heat energy accessed?

The stored heat energy is accessed by using a The stored heat energy is accessed by using a carrier to bring it up to the surface.carrier to bring it up to the surface.

The carrier used presently is water. This works in The carrier used presently is water. This works in one of two ways:one of two ways:

• Drilling wells down into deep reservoirs of hot Drilling wells down into deep reservoirs of hot water. The hot water then naturally rises to the water. The hot water then naturally rises to the surface. (see figure8) orsurface. (see figure8) or

• Pumping cold water through a well that reaches Pumping cold water through a well that reaches down into hot rocks, which heat the water. The down into hot rocks, which heat the water. The hot water is then pumped back up to the surface hot water is then pumped back up to the surface through separate well. (see figure9.)through separate well. (see figure9.)

Page 8: Presentation - Geothermal Energy

Figure8: Generating electricity in geothermal power station using hot water Figure8: Generating electricity in geothermal power station using hot water from a hot water reservoir. The hot water rises up a well and it’s heat energy from a hot water reservoir. The hot water rises up a well and it’s heat energy is used. Then now cool water is returned to the reservoir via another well, to is used. Then now cool water is returned to the reservoir via another well, to be re-heated.be re-heated.

Page 9: Presentation - Geothermal Energy

Figure 9

Page 10: Presentation - Geothermal Energy

The cost to the EnvironmentThe cost to the Environment

Geothermal power is considered a nonpolluting Geothermal power is considered a nonpolluting source of energy, but it does have some serious source of energy, but it does have some serious environmental drawbacks. Often, to develop a environmental drawbacks. Often, to develop a geothermal site, fragile.geothermal site, fragile.

Ecosystems must be disturbed. Roads must be built Ecosystems must be disturbed. Roads must be built to the sites, which are usually remote because the to the sites, which are usually remote because the land around geothermal vents is usually too land around geothermal vents is usually too unstable for human habitation. Wells must often unstable for human habitation. Wells must often be dug, which disrupts the natural flow of be dug, which disrupts the natural flow of groundwater. These actions can impact the groundwater. These actions can impact the surrounding habitat if site development is not surrounding habitat if site development is not managed correctly.managed correctly.

Page 11: Presentation - Geothermal Energy

The future of Geothermal powerThe future of Geothermal power

Currently there are about twenty countries that harness the power of geothermal energy. The united states produces about 45 percent of all geothermal power in the world. Some scientists believe these numbers will increase, as they think the potential for geothermal power has not even begun to be explored. Simply using today’s technology and applying it to all available geothermal sites would increase the output of electricity from about 8,240 megawatts to 70,000 megawatts. Using technologies that are being currently researched could increase this figure to as much as 138,000 megawatts. This would be enough power to continuously satisfy about 8 percent of all the energy needs in the world.

Page 12: Presentation - Geothermal Energy

Reasons to support Geothermal EnergyReasons to support Geothermal Energy

1.1. Geothermal power is reliable powerGeothermal power is reliable power2.2. Geothermal power creates jobs and spurs Geothermal power creates jobs and spurs

economic growtheconomic growth3.3. Geothermal energy promotes national securityGeothermal energy promotes national security4.4. Geothermal is environmentally friendlyGeothermal is environmentally friendly5.5. Geothermal supports local economic Geothermal supports local economic

developmentdevelopment6.6. Geothermal is a versatile energy resourceGeothermal is a versatile energy resource7.7. Geothermal makes good economic senseGeothermal makes good economic sense8.8. Geothermal uses humanly approachable Geothermal uses humanly approachable

technololgytechnololgy9.9. Geothermal energy is widely availableGeothermal energy is widely available