Aquasource (SW) Ltd t/a Groundsource South West have completed 10 boreholes for Ground Source Heat Pumps at a new housing site in Newquay. The use of Ground Source Heat Pumps will enable the properties to be Zero Carbon Homes.
Geothermal hole details.
Due to expected ground conditions drilling technique used for the Ground Source Holes was down the hole percussion. This technique enables holes to be drilled through hard solid rock.
The Ground Source holes were drilled to a depth of 85m, probe inserted and grouted with Geothermal Grout from the bottom up.
The Geothermal grout seals the holes, provides good heat transfer from the ground to the probes and prevents contamination of the ground water by dirty surface water. Bottom up grouting ensures that the holes are filled completely with no gaps that may prevent efficient thermal transfer. This can be due to partial hole filling and is to be avoided if possible.
The holes were completed despite some very challenging ground conditions which tested the ingenuity of our drillers to the limit!
This was because a near horizontal layer of soft clay needed to be overcome to enable the successful insertion of the Ground Source Geothermal Probes.
Consequently all the holes were cased through the clay zone into the stronger rock below.
The amount of water encountered during the drilling also posed problems for the drillers.
The wetness of the holes however is good news for the performance of the Ground Source Heat Pump system.
For more information on our range of services for Heat Pumps including drilling and ground works, Electrofusion jointing and the supply and installation of the Kensa range of Heat Pumps in commercial and domestic properties please contact Roger Wedlake on 01209 862874, 01726 824837, 07980499619 or email firstname.lastname@example.org.