Many people have heard of geothermal energy, but don't know what it involves. In short, the Earth's core is quite hot - above 9,000 degrees Fahrenheit; geothermal energy leverages the Earth's heat and turns it into a usable, renewable resource for people on the surface. Understanding geothermal facts informs people of their options for home heating and cooling systems.
- Residential Geothermal Heating and Cooling
Geothermal energy can both heat and cool residences. The Earth's ground temperature stays at a constant 50 to 55 degrees year-round; it's much more consistent than air temperatures. Geothermal heat pumps circulate water through pipes buried next to the home. When heating, heat from the Earth transfers from the pipes to the liquid to the home. When cooling a home, heat transfers from the home to the circulating water and then to the Earth. The system uses electricity to move heat rather than to generate heat by burning fossil fuels.
- Open Loop vs. Closed Loop
There are two types of systems: closed loop and open loop. Open loop systems draw water from the ground, pass it through the heat pump's heat exchanger, and dispel it through a second well. Two or three gallons of water per minute per ton of capacity are needed for efficiently exchanging heat. Closed loop systems pump water through a continuous buried pipe system, which doesn't affect the surrounding environment. These are the most common.
- Efficient, Cost-effective, and Clean
The Environmental Protection Agency rates geothermal heat pumps as one of the most efficient heating and cooling technologies, both environmentally clean and cost-effective for consumers. Every 100,000 geothermal heat pumps installed leads to an emissions reduction of 2.18 million metric tons of carbon equivalents. This saves homeowners around $750 million over the 20-year span of the equipment, lowering monthly bills between 25% and 50%. It also lowers electricity consumption by 799 million kilowatt hours per year and lowers oil consumption by 2.15 million barrels per year.
Geothermal facts prove it's a superior energy alternative for the environment and for lower costs, but it's also well-liked by users. People who have geothermal heat pumps are significantly more satisfied than traditional electricity users. Polls continue to show that 95% would recommend them to family and friends.
This is taken from an article by Amit Raju (Article Source:
EzineArticles.com/?expert=Amit_Raju).
Amit Raju writes about the advantages of geothermal energy for http://neogeothermal.com, a site dedicated to residential and industrial geothermal systems.