They use the constant temperature of the earth as the exchange medium instead of the outside air temperature. The main problem with many renewable energy installations is, that compared to normal energy systems such as gas/oil or electric, the installed costs are generally much higher, thus meaning the economies of scale are more limited.

This energy is then converted into heat for use in the home. They comprise a series of pipes buried underground which extract this solar energy. Geothermal heat pumps (GHPs) also go by another name: geoexchange systems. Ground Source Heat Pump: Green Energy Made Affordable Ground source heat pumps are an effective as well as environmentally friendly investment that can help you save up to 50% on heating bills when compared to conventional heating systems. Geothermal heat pumps (GHPs), sometimes referred to as GeoExchange, earth-coupled, ground-source, or water-source heat pumps, have been in use since the late 1940s. These installations heat and cool private homes, office buildings, stores, and other such constructions. The ground pump can also act as heat absorber and remove the excess heat building … The water warmed by the ground then passes through the pump which increases its temperature to a suitable level used for hot water and heating. There are two main elements of a ground source heat pump system: The ground array, which is buried underground.
The system uses ground heat (or groundwater, in some situations), to heat the home in winter. Ground-source heat pump (GSHP) systems have seen significant market expansion in recent years and a considerable number of unitary air-conditioning and heat pump (HP) equipment manufacturers have developed HPs for ground-coupled applications for both residential and commercial building sectors. A Ground Source Heat Pump creates energy by pumping water through pipes buried beneath the ground. Ground Source Heat Pump: What Is It?

Initial investments are high, but the ground source heat pump prices vary depending on the project. You cannot accurately design a ground source heat pump system. Ground source heat pumps absorb the energy from the sun warming the ground.