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Geothermal Power

Lauren McGuire Rachelbeth Brignola
by

lauren mcguire

on 18 February 2011

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Transcript of Geothermal Power

Geothermal Power What is Geothermal Energy? Geothermal energy
is heat energy provided
by the earth's interior
from nature. How Geothermal
Technology Works. There are three
approaches to
obtaining energy
through the
earth. 1. Dry Steam is a process where steam is pulled directly from the ground through the turbine. Then it is changed into water in a condensor, which powers the turbine and produces electricity. 2. Flash Steam is the second process in which
hot water from the ground is depressurized
into steam in the flash tank. This steam is
then used to power the turbine. 3. The Binary System is the third process. Hot
water goes through a heat exchanger where it heats another liquid, isobutane, for example. Since the
isobutane boils at a lower heat than water, it is more
easily made into steam to run the turbine. Advantages of Using Geothermal Power. CLEAN THRIFTY RELIABLE FLEXIBLE Using geothermal energy conserves
nonrenewable fossil fuels. By
decreasing the use of these harmful
fuels, the amounts of emissions that
are released into the atmosphere are
reduced. Geothermal power plants are not affected by weather and are able to run 24 hours a day all year. These plants sit directly on top of the power source; therefore they are constantly being replenished. Since geothermal power is derived from the earth’s core, there is no need to pay for alternative fuel sources. Geothermal power plants can be installed in increments that can be modeled to fit in virtually any space. Disadvantages of using geothermal power. Suitable Build Location Finding land where steam can be extracted is difficult and usually takes several years. These "hot spots" are oftentimes found inconveniently near volcanoes and fault lines. Danger The use of geothermal power plants can at times be hazardous. Dangerous minerals and gases can potentially be brought up from underground along with the extracted steam. These can be difficult to safely dispose of. Running
On
Empty! Although it is rare, geothermal areas can run dry or lose steam after several decades of use. What Does The
Future Hold? CHANGE More, More, More! One Step Further. In the future, we believe geothermal power sources will be more commonly used because of their reliability and their ability to be renewed. Although it is difficult to find areas for build, the use of geothermal power plants is beginning to spread throughout the world. Over the next decade, the growth of geothermal energy systems will rely on discovering new water-dominant geothermal fields. Also, improved techniques, such as core hole evaluation, will reduce the risk of exploratory drilling. New geothermal technology called Hot Dry Rock geothermal is designed to be able to tap into deeper sources, however, there is a long road to creating drills that are able to reach these great depths at a low enough cost. The use of geothermal power sources can ensure a promising future for clean energy. It can also change the future by creating energy that will not pollute the environment or contaminize the air. Commonly cited reasons for the continued use of geothermal energy sources are that they are not costly, good for the environment, dependable, and easy to work with. Common criticisms against geothermal power sources include its potential dangers, the rarity of running out of fuel, and its demand for specific areas for build.
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