Jan 172009
 

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Geoexchange systems, a third category of geothermal energy use, are becoming increasingly common throughout the United States and Europe. These systems use relatively shallow, but constant, earth temperatures for efficient heating and cooling of buildings. There are two main methods of utilizing geothermal energy: direct heat usage and electricity generation. Direct heat usage is the most commonly used form because it is the simplest. He spoke to the expansion of geothermal energy in the Western United States. That expansion is coming to Washington state.

On the surface, the results of these restless boundaries are soaring mountain ranges (Himalayas, Swiss Alps, Andes), earthquakes, volcanic eruptions, hot springs and geysers and potential geothermal energy. Today, geothermal energy provides about five percent of California’s electricity, and 25 percent of El Salvador’s wind energy. In Idaho and Iceland, geothermal heat is used to warm buildings and for other applications. In thousands of homes and buildings across the United States, geothermal heat pumps use the steady temperatures just underground to heat and cool buildings, cleanly and inexpensively. Geothermal energy refers to the heat contained within the Earth that generates geological phenomena on a planetary scale. Today, this term is often associated with man€s efforts to tap in to this vast energy source.

EGS expands the potential of traditional geothermal energy by orders of magnitude. The traditional geothermal approach relies on finding naturally occurring solar energy and pockets of steam or hot water. One such option that is often ignored is geothermal energy, produced from both conventional hydrothermal and Enhanced (or engineered) Geothermal Systems (EGS). An 18-member assessment panel was assembled in September 2005 to evaluate the technical and economic feasibility of EGS becoming a major supplier of primary energy for U.S. Both should favor geothermal energy. Furthermore, since installation is where most of the cost of geothermal lays, once geothermal plants have been installed (due to government requirements and/or financial support), geothermal companies will continue to be competitive – even when legislative support runs out.

Geothermal energy is energy that emits from the earth. It comes from magma and the radioactive decay of uranium , thorium , and potassium . This curriculum unit describes geothermal energy in the context of the world’s energy needs with earth energy. It addresses renewable and nonrenewable energy sources with an in-depth study of geothermal energy — its geology, its history and its many uses. One of the disadvantages of geothermal energy is that it is not easily transported. It can only be used to generate electricity for surrounding areas.


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