Geothermal Energy is heat (thermal) derived from the earth (geo). It is the thermal energy contained in the rock and fluid (that fills the fractures and pores within the rock) in the earth's crust. While temperatures above ground change a lot from day to day and season to season, temperatures 10 feet below the Earth's surface hold nearly constant between 50° and 60°F. For most areas, this means that soil temperatures are usually warmer than the air in winter and cooler than the air in summer. Geothermal heat pumps use the Earth's constant temperatures to heat and cool buildings. They transfer heat from the ground (or water) into buildings in winter and reverse the process in the summer.
Geothermal Solutions are Green and Cost Effective The current production of geothermal energy from all uses places third among renewables, following hydroelectricity and biomass, and ahead of solar and wind. According to the U.S. Environmental Protection Agency (EPA), geothermal heat pumps are the most energy efficient, environmentally clean, and cost effective systems for temperature control. Ground-source heat pumps use the earth or groundwater as a heat source in winter and a heat sink in summer. Using resource temperatures of 4°C (40°F) to 38°C (100°F), the heat pump, a device which moves heat from one place to another, transfers heat from the soil to the house in winter and from the house to the soil in summer.
Geothermal Heating and Cooling: How it works Geothermal Energy is heat (thermal) derived from the earth (geo). It is the thermal energy contained in the rock and fluid (that fills the fractures and pores within the rock) in the earth's crust. It simply takes advantage of the earth's ability to store heat. Water circulates through a loop of pipe buried in the ground and draws off the free heat from the earth. The heat is then concentrated by the geothermal heat pump through the refrigeration process and is released into your home through the blower or radiant floor heat system. In the summer, the process is reversed and heat is removed from your home and put back into the earth. geothermal hotgeothermal coldThe loop that collects the heat from the earth can take a variety of shapes depending on the location. All of these loop types serve one purpose: To collect free heat from the earth and deliver it to the heat pump. To see actual loop systems being installed Click on the Graphic Below. geothermal loop