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Geothermal Energy

Geothermal Energy. What is Geothermal Energy?. Geothermal energy comes from the heat within the earth. In areas where there is underground water, the magma heats the water and creates either hot springs or underground reservoirs.

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Geothermal Energy

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  1. Geothermal Energy

  2. What is Geothermal Energy? • Geothermal energy comes from the heat within the earth. • In areas where there is underground water, the magma heats the water and creates either hot springs or underground reservoirs. • Geothermal energy is renewable because water is replenished with rainfall and heat is continuously produced within the earth. • The water and steam from these reservoirs range in temperature from 250 to 700 degrees Fahrenheit.

  3. The hottest geothermal regions are found along major plate boundaries where earthquakes and volcanoes are concentrated.

  4. But How Do We Use It? • Geothermal energy is harnessed by drilling wells into the underground geothermal reservoirs. The steam and heat is used to drive turbines in electric power plants. • Geothermal energy accounts for 0.3% of the energy in the U.S. That is enough to provide power to 3 million households.

  5. Uses Continued… • Geothermal Energy for heating and cooling • For Example: In the capital of Iceland, 95% of the buildings use geothermal heat. • Geothermal systems at home use the Earth’s constant temperatures to heat and cool buildings.

  6. Cons or Disadvantages • The earth has no shortage of geothermal activity, but not all geothermal resources are easy or economical to use. (The cost is more than the savings.) • Geothermal plants release only 1% of the carbon dioxide emitted by comparable fossil fuel plants.

  7. Pros or Advantages • It costs 4.5 to 7 cents per kWh • Reduce heating costs by 50-70%. Over the lifetime of the system, the average homeowner can anticipate saving about $20,000. • The EPA has rated geothermal heat pump systems among the most efficient heating and cooling technologies. • The most important economic aspect of geothermal energy use is that it's homegrown (does not need to be imported)

  8. Geothermal Electric Power Plant

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