Geothermal borehole drilling A Geo-Drill rig at work

Geothermal Energy Systems
How Geo-Drill could help you to be more efficient.

Heat Pumps

A geothermal heat pump is a heat and/or an air conditioning system that utilises the Earth’s ability to store heat underground.

The heat pump abstracts that heat from the ground in the colder months but can also be reversed to take the heat from a building, putting it into the ground, in the summer months.

Closed Loop Systems

Closed loop systems are usually 150mm boreholes drilled to a depth of between 50-200m, depending on energy requirements, local geology and space available.

The installation, better known as the loop, is made up of either 2 or 4 durable HDPE pipes, these pipes are joined at the base in pairs with a custom u-bend.

A self contained GeoLoop 50-500 grout unit or similar is then used to install the loop to the base of the borehole .The same unit is then used to Install a tremmie pipe to the base of the borehole before the operator mixes and pumps the thermally enhanced grout from the unit to the base of the borehole up to ground level ensuring constant level of thermal response throughout the borehole.

Once the loop field has been installed and pressure tested the loops are then connected together in a series of trenches and then buried. The system is then ready to be connected to the heat pump.

Open Loop Systems

Open loop systems involve drilling a larger diameter borehole than closed loop; open loop is similar in design to that of a traditional water well.

These boreholes are usually drilled in pairs, the first to abstract water from the aquifer* beneath the site the second to return the water to source after going through the heat exchanger or heat pump where heat is extracted.

The installation of an Open Loop system can often involve consultation with the local Environment Agency.

* An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, silt, or clay) from which groundwater can be usefully extracted using a water well.

To see how we could help you, contact us.