Geothermal power
What's geothermal power (geothermal energy)? From geothermal, comes from the Greek roots geo, meaning earth. And thermos, meaning heat. That's the meaning of geothermal power. Geothermal power is energy generated from heat stored in our earth, or the collection of absorbed heat derived from underground.
The Philippines and Iceland are the only countries to generate a significant percentage of their electricity from geothermal power sources; in both countries 15-20% of power comes from geothermal plants.
In fact as of 2008, geothermal power supplies less than 1% of the world's energy, just a small part.
Geothermal energy resources range from shallow ground to hot water and rock several kilometres below the Earth's surface, and even further down to the extremely hot molten rock called magma.
Wells over 1.5 km deep can be drilled into underground reservoirs to tap steam and very hot water that can be brought to the surface for use in a variety of applications.
Geothermal technologies include:
1. Conventional geothermal
2.Direct heat:
Hot water near Earth's surface can be piped directly into facilities and used to heat buildings, grow plants in greenhouses, dehydrate onions and garlic, heat water for fish farming, and pasteurize milk.
3.Geothermal heat pump
