Posts Tagged ‘energy’
Looking To The Past Of Geothermal Energy
March 23, 2010 | 
Author Geothermal energy is often viewed as a relatively new form of alternative energy. In truth, the use of geothermal energy stretches far back into the past.
Looking To The Past Of Geothermal Energy
Geothermal energy is literally, “earth heat”. This type of energy’s name comes from two Greek words: “geo” meaning earth, and “therme”, which means heat. While it may seem that the use of geothermal energy is a relatively new idea, it is actually an ancient practice. Many different cultures have used geothermal power to their advantage, dating back to some of the Earth’s earliest civilizations.
In order to use geothermal energy, the energy source itself must be tapped into. Geothermal energy comes from reserves of water located in the Earth’s layer of magma. Magma, otherwise known as molten rock, is a super hot substance that springs directly from the Earth’s core, which is a scalding 9,000 degrees Fahrenheit. Magma heats the reserves of water located in its midst to very high temperatures, around 700 degrees Fahrenheit. These geothermal reservoirs, as they are known, can be drilled into or can escape naturally through cracks in the Earth’s crust. These natural formations create such places on Earth as hot springs and geysers.
Geothermal energy can be traced back to 10,000 years ago when Native Americans used geothermal water found in hot springs to cook and for use as medicine. The geothermal energy found in hot springs was also used by the Romans. The ancient city of Pompeii used geothermal energy to heat homes. Romans also were known to use geothermal water for its medicinal properties; such as in the treatment of skin and eye diseases. Romans and other ancient civilizations also used the soothing geothermal waters found in hot springs for relaxation and natural bathing places. In more recent times, France started using this type of energy in the 1960′s to heat their homes. More than 200,000 homes in France are now heated by geothermal water.
Posted in Science | 
Tags: alternative, ancient city of pompeii, earth, energy, France, fuel, geothermal, geothermal reservoirs, hot springs and geysers, magma, native americans, Pompeii, power, resources | 
No Comments »
Harvesting A Natural Resource: Wind Power
In today’s economy, with America’s increasing consumption of electricity and natural resources, the possibility of an inexpensive, renewable and reliable energy source is seen by consumers as a breath of fresh air. That’s where wind energy comes in.
According to the Department of Energy, modern wind turbines can convert winds in most U.S. states and coastal waters into reliable, clean electricity. While wind today provides only a small percentage of our national electricity needs, it is an immense homeland energy resource and is the fastest-growing energy supply technology.
The United States has an abundance of potentially viable wind resources-onshore and offshore-estimated at over 2,000 gigawatts (GW). To put this into perspective, 350 GW of installed wind capacity would represent about 20 percent of our nation’s current electricity demand. This is similar to the level of electricity produced from the nation’s nuclear or natural gas-fired generation today.
Today, the nation’s “wind farms” generate over 9,000 megawatts of electricity-enough electricity to serve more than two million households. Smaller wind systems are being used to generate on-site power and provide additional power to local utilities, and the market is expanding at over 20 percent annually. However, wind power represents more than just competitive electricity. It offers:
• rural economic benefits from project development;
• a hedge against volatile natural gas prices and planned use of imported liquid natural gas;
• cost-effective clean air compliance option for businesses and communities;
• strong potential partner for other domestic power industries including coal and nuclear; and
• a renewable option for producing hydrogen for transportation fuels.