Presentation - Geothermal Energy .

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Presentation - Geothermal Energy .

  1. 1. 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
  2. 2. 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
  3. 3. Renewable Energy Renewable Energy:Renewable Energy: Is any energy source that is naturallyIs any energy source that is naturally replenished,like that derived from:replenished,like that derived from: • SolarSolar • WindWind • BiomassBiomass • HydroelectricHydroelectric • GeothermalGeothermal
  4. 4. What is geothermal energy?What is geothermal energy? Geothermal energy is the name given to theGeothermal energy is the name given to the naturally occurring heat energy that is availablenaturally occurring heat energy that is available below the earth’s surface. (this name comes frombelow the earth’s surface. (this name comes from geo ,meaning earth, and thermal meaning heat) sogeo ,meaning earth, and thermal meaning heat) so geothermal means earth-heat.geothermal means earth-heat.
  5. 5. Where Geothermal energy comes from?Where Geothermal energy comes from? The answer is the earth itself, the geothermal heat isThe answer is the earth itself, the geothermal heat is produced by the core of the earth itself. You mayproduced by the core of the earth itself. You may not think that energy to be much when comparednot think that energy to be much when compared to the sun but you would be wrong is someto 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. TheThat is hotter than the surface of the sun. The Earth’s geothermal energy is created by the decayEarth’s geothermal energy is created by the decay of radioactive materials in the core and in theof radioactive materials in the core and in the surrounding layers of rock.surrounding layers of rock.
  6. 6. Harnessing Geothermal energy/benefits The heat energy transferred from the mantle to theThe heat energy transferred from the mantle to the waters in the earth’s crust can be harnessed towaters in the earth’s crust can be harnessed to create electricity. This can happen in threecreate electricity. This can happen in three different ways. Dry steam reservoirs harness thedifferent ways. Dry steam reservoirs harness the energy of geysers to produce electricity. Wetenergy of geysers to produce electricity. Wet steam reservoirs use recycled water to makesteam reservoirs use recycled water to make steam deep in the geothermal wells that aresteam deep in the geothermal wells that are heated by the mantle of the earth. Hot waterheated by the mantle of the earth. Hot water reservoirs create a supply of heated water fromreservoirs create a supply of heated water from underground sources that can be used to heatunderground sources that can be used to heat homes and businesses.homes and businesses.
  7. 7. How is heat energy accessed?How is heat energy accessed? The stored heat energy is accessed by using aThe 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 inThe carrier used presently is water. This works in one of two ways:one of two ways: • Drilling wells down into deep reservoirs of hotDrilling wells down into deep reservoirs of hot water. The hot water then naturally rises to thewater. The hot water then naturally rises to the surface. (see figure8) orsurface. (see figure8) or • Pumping cold water through a well that reachesPumping cold water through a well that reaches down into hot rocks, which heat the water. Thedown into hot rocks, which heat the water. The hot water is then pumped back up to the surfacehot water is then pumped back up to the surface through separate well. (see figure9.)through separate well. (see figure9.)
  8. 8. Figure8: Generating electricity in geothermal power station using hot waterFigure8: 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 energyfrom 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, tois used. Then now cool water is returned to the reservoir via another well, to be re-heated.be re-heated.
  9. 9. Figure 9
  10. 10. The cost to the EnvironmentThe cost to the Environment Geothermal power is considered a nonpollutingGeothermal power is considered a nonpolluting source of energy, but it does have some serioussource of energy, but it does have some serious environmental drawbacks. Often, to develop aenvironmental drawbacks. Often, to develop a geothermal site, fragile.geothermal site, fragile. Ecosystems must be disturbed. Roads must be builtEcosystems must be disturbed. Roads must be built to the sites, which are usually remote because theto the sites, which are usually remote because the land around geothermal vents is usually tooland around geothermal vents is usually too unstable for human habitation. Wells must oftenunstable for human habitation. Wells must often be dug, which disrupts the natural flow ofbe dug, which disrupts the natural flow of groundwater. These actions can impact thegroundwater. These actions can impact the surrounding habitat if site development is notsurrounding habitat if site development is not managed correctly.managed correctly.
  11. 11. 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.
  12. 12. Reasons to support Geothermal EnergyReasons to support Geothermal Energy 1.1. Geothermal power is reliable powerGeothermal power is reliable power 2.2. Geothermal power creates jobs and spursGeothermal power creates jobs and spurs economic growtheconomic growth 3.3. Geothermal energy promotes national securityGeothermal energy promotes national security 4.4. Geothermal is environmentally friendlyGeothermal is environmentally friendly 5.5. Geothermal supports local economicGeothermal supports local economic developmentdevelopment 6.6. Geothermal is a versatile energy resourceGeothermal is a versatile energy resource 7.7. Geothermal makes good economic senseGeothermal makes good economic sense 8.8. Geothermal uses humanly approachableGeothermal uses humanly approachable technololgytechnololgy 9.9. Geothermal energy is widely availableGeothermal energy is widely available

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