Geothermal energy:
Geothermal power uses the natural sources of heat inside the Earth to produce heat or electricity. Currently, most geothermal power is generated using steam or hot water from underground. Geothermal power generation produces few emissions and the power source is continuously available.
There are three geothermal technologies currently in use in the United States: direct-use systems, use of deep reservoirs to generate electricity, and geothermal heat pumps.
In direct-use geothermal systems, a well is drilled into a geothermal reservoir to provide a steady stream of hot water. The water is brought up through the well, and a mechanical system—piping, a heat exchanger, and controls—delivers the heat directly for its intended use. A disposal system then either injects the cooled water underground or disposes of it in a surface storage pond. Geothermal hot water is used for heating buildings, raising plants in greenhouses, drying crops, heating water for fish farms, or for industrial processes, at hundreds of sites around the country. Geothermal reservoirs appropriate for direct-use systems are widespread throughout the western United States. Geothermal power plants convert hydrothermal fluids (hot water or steam) to electricity. The oldest type of geothermal power plant uses steam, accessed through deep wells, to directly drive a turbine to produce electricity. Flash steam plants are the most common type of geothermal power plants in operation today. They use extremely hot water (above 300 degrees F (149 degrees C)), which is pumped under high pressure to the generation equipment at the surface.
Estimated subterranean temperatures at a depth of 6 kilometers. The hot water is vaporized and the vapor in turn drives turbines to generate electricity. Binary-cycle geothermal power plants use moderate-temperature water (100-300 degrees F (38-149 degrees C)). The water is used to vaporize a second fluid that has a much lower boiling point than water. The vapor from this second fluid is then used to drive the turbines to produce electricity. California, Hawaii, Nevada, and Utah currently have operating geothermal power plants.
- Related Articles
- Related Q&A
- A Jewish Graveyard and a Battlefield
- Incidence of Gastrointestinal Helminthes in Captive Elephants in Wildlife Reserves of Nepal
- Third Ruck From the Son
- Islam 101- Who is Muhammad?
- Has the Palestine Liberation Organisation Lost the Plot - or Missed the Boat?
- The Holy Line of Prophet Muhammad (saas): Sayyids
- Alkab
- How to Stay in Touch With Your Pashto Language Roots
Unconventional Renewable Energies
By: Andrew Spark | 11/11/2009Hydroelectric power captures the energy of moving water. Large-scale hydroelectric plants are a mature technology and already well established around the world. There is, however, ongoing research into mini-hydro, which can be installed on a home or village basis. Any electricity produced this way which is not used can be sold back to the grid.
What Is Renewable Energy
By: Andrew Spark | 11/11/2009Renewable energy is a source of power which is replenished naturally, such as solar, wind or biomass. In 2005, about 13% of global primary, or raw, energy comes from renewables, of which most is from traditional biomass like wood-burning.
What Is Climate Change
By: Andrew Spark | 11/11/2009Climate refers to the average weather experienced over a long period of time, and includes temperature, wind and rainfall patterns. The climate of the Earth has changed many times during the planet’s history in response to a range of natural causes, but it is now changing rapidly due to human influence.
Which is the Best DAT Program?
By: Dr. Wayne Huang | 11/11/2009Rapid Learning System uses the three components above with rich-media with focus on concept understanding and problem solving. Any DAT course has 24x rich-media videos, 24x problem drills and 24x cheat sheets.
Climate Change, an old story?
By: Geromec | 10/11/2009When did this climate change and global warming started? At first, scientists projected that something that the earth today has been compared to time bomb. Some explained it by using destructive analogy. These views are still lasting, but there are also views contradicting from the first. That the earth is the same with our body mechanism which has the capability fight foreign elements like flu, cancer and any type sickness. That the earth has its own defensive mechanism to fight this pheno
Science Questions & Answers
By: isfaq | 10/11/200910 Laboratory Apparatus And Their Use? Give at least 10 laboratory apparatus and their uses Beaker barrette clay triangle wire gauze test tube forceps graduate cylinder Graduated pipette Condenser Crucible....
Fast Track DAT Study in Biology
By: Dr. Wayne Huang | 10/11/2009The rich-media Rapid Learning Series by Rapid Learning Center is a break-through learning system with scientific teaching method coupling with rich-media visualization and expert narration.
The Powerful DAT Review in Organic Chemistry
By: Dr. Wayne Huang | 09/11/2009The rich-media Rapid Learning Series by Rapid Learning Center is a break-through learning system with scientific teaching method coupling with rich-media visualization and expert narration. In organic chemistry, it breaks down the entire course into 24 chapters, one chapter at a time, one hour per chapter in total of 24 hours.
Solar Energy
By: Hamza Naeem | 09/11/2007 | ScienceThe solar energy in America. Solar energy is reliable but in Amreica its not reliable because there is less heat in America
Geothermal Energy
By: Hamza Naeem | 09/11/2007 | ScienceGeothermal energy in America is reliable but it needs too much of space and it can also destroy wildlife
Limitations of Wind Energy
By: Hamza Naeem | 09/11/2007 | ScienceWhat are the limitations of wind energy and the solutions of those energies.
Emergency in Pakistan
By: Hamza Naeem | 07/11/2007 | PoliticsAllah please save our country and give our leaders politeness so that we can live happily
Lack of Energy in Earth
By: Hamza Naeem | 07/11/2007 | ScienceWe should save energy so that there should not be lack of energy in future.
Solar Energy in America
By: Hamza Naeem | 07/11/2007 | ScienceThe use of solar energy in America. Its not reliable to use it because there is less heat in America
Wind Energy in America
By: Hamza Naeem | 07/11/2007 | ScienceI think the best energy in America is wind energy. And it should be used in America.