ABSTRACT
Geothermal systems have promise as a future energy source for many parts of the world. In a geothermal system, steam enters a path (through a pipeline or a vent) to the surface of the earth. The pipelines which carry the steam are constructed with large expansion loops that cause small pieces of rock to be left in the loops. The geothermal power production method offers another alternative of producing electrical power. Because geothermal energy is a nearly unlimited resource, it is becoming increasingly popular to utilize this resource as a source of heating and cooling for residential and commercial areas. Energy from the wind has been used for centuries to propel ships, to grind grain, and to lift water. In farm areas at the turn of this century, electrical power had not been distributed to homes. The potential amount of energy which could be produced in the United States by biomass sources is substantial also at this time.
