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Amber Nichols

on 24 May 2010

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Transcript of .*Geothermal.Energy*.

.*Geothermal.Energy*. .*Amber.Nichols.12*. ¿?what is geothermal?¿ -Is the extracted from heat stored in the earth.
this geothermal energy orignates from the
rignal formation of the planet, from radio active
decay of minerals, and from solar energy
absorbed at the surface. «.Advantages.» In both commercial and residential installations, geothermal heat pump systems typically have lower maintenance costs than conventional systems as all equipment is installed inside the building or underground. This means that there is no outside equipment exposed to weather and vandalism. All refrigerant systems are sealed, similar to household refrigerators.

In commercial installations, systems can save money by recovering excess heat from building interior zones and moving it to the perimeter of the building. They can also save money by allowing management to isolate and shut down unoccupied areas of the building.

Refrigerant Loop geothermal systems have several advantages over other
eothermal systems. They are potentially more efficient than water loop systems. They require fewer feet of buried piping than other geothermal systems, have no freeze problems, and better heat transfer.
Geothermal systems are very flexible. They can be easily and inexpensively subdivided or expanded to fit building remodeling or additions. They are particularly well-suited to "tenant finish" installations. «.Disadvantages.» Many closed-loop systems use an antifreeze solution to keep the loop water from freezing in cold temperature conditions. Most antifreeze solutions have very low toxicity, but many produce CFCs and HCFCs, which add to environmental concerns. In addition, some antifreeze solutions increase fluid viscosity making the system work harder and adding to the cost of pumping.
Open-loop systems
equire a large supply of clean water in order to be cost effective. This often limits their use to coastal areas, and areas adjacent to lakes, rivers, streams, etc. In addition, there must be an acceptable method of returning the used water to the environment. This may be limited not only by environmental factors (such as no place to dump that much water), but also by local and state regulations. Duct systems must be installed
to bring outside air to each space.
Secondary or backup heat sources are required in cooler climates.
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