Ground Source Drilling (Geothermal drilling)

Geocore is a ground source drilling specialist working throughout the UK. We are proud to operate in the renewables sector, working to change the way that we live and work for a more sustainable future. Ground source drilling – also known as geothermal drilling – involves drilling vertically into the surface to depths of 50–300 m and inserting either a 32- or 40-mm loop that circulates a water–antifreeze mixture.

Ground source heat retrieval involves pumping the fluid through pipes because the mixture is at a lower temperature than the ground. This low-grade heat is transferred to a heat pump, where it is used to heat the refrigerant inside a heat pump unit. The unit compresses the warmed refrigerant to create more heat. The output from the heat pump is typically 45–50°C for interior space heating and up to 55°C for domestic hot water. A closed loop system is typically installed where groundwater cannot be used to circulate through a heat transfer pump.