Geothermal Heating and Cooling has been used for several decades. Though it has been referred to under many names--ground source heat pump, geothermal heat pump, geoexchange, earth source heat pump, ground coupled heat pump, earth coupled heat pump, etc.--geothermal heating is the most reliable, usable form of renewable energy. It doesn't rely on the sun shining or the wind blowing. The earth has a constant, reliable source of energy.
What is a Geothermal Heat Pump?
A geothermal heat pump is an appliance that can use energy from the sun that's stored in the earth to heat your home. It also uses the earth as a heat-sink to disperse heat from your home to the ground in the cooling mode.
The earth is the largest solar energy collector on our planet. Energy from the sun is collected and stored in the earth's crust. This energy can be extracted very efficiently by using an EarthLinked geothermal heat pump.
To do this, it employs an earth loop. An earth loop is a series of pipes installed in the ground to circulate refrigerant between the heat pump and the earth.
The picture below depicts the loop options of an EarthLinked heat pump
The EarthLinked system connects its copper refrigerant tubing directly to the earth for the heat transfer. This direct contact allows for high efficiencies. EarthLinked's design allows for longer compressor life by ensuring oil return to the compressor, eliminating sub-cooling of the liquid, and stopping super-heating of the vapor.
Geothermal heat pump technology has been used for decades. Visit the Geoexchange website for more information.