Ground Source Heating
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Geothermal engineering – renewable and sustainable
Specialised drilling services for all types of ground source heating projects, including drilling, manifold and pipework installation, as well as thermal response tests for loop design.
How we work
We work alongside accredited MCS GSHP installers to combine the best overall drilling and installation package. On completion, our ground loops are pressure tested before grouting to ensure their integrity. Connected pipework is likewise pressure tested and certificated before the addition of the heat transfer fluid, ready for connection to the ground source heat pump.
All GSHP loops and connected pipework are installed with electro-fused couplers and materials to ensure the highest quality installation and compliance. We are able to install both closed and open loop systems.
There are a number of benefits to ground source heating installations:
- Reduced CO2 emissions.
- The electricity used to power the system provides approximately 4 x energy output.
- An investment in renewable energy and a sustainable heating system.
- Huge saving opportunities.
- Reversible system – produce cool air in summer.
- Provides more constant temperatures than air sourced methods.
- Tried and tested technology.
Ground loop systems
We can install two different types of ground loop systems – open loop and closed loop.
These systems require water from a water well, lake or river to provide the heat source and do not recycle heat transfer fluid. The abstracted groundwater is circulated directly through the heat pump and then used as part of a grey water system, discharged to a surface water system or simply back underground.
A second borehole may be required if a discharge to groundwater is used. Normally, due to the high volumes involved, it may be necessary to obtain abstraction licences.
Generally, open loop systems are more economical on larger projects.
This system incorporates a vertical borehole with a single U-shaped plastic pipe loop, circulating a heat transfer fluid such as glycol. These loops are usually installed at depths of up to 150 metres. The finished borehole is completed with a special heat conductive grout which encases the loop from top to bottom.
The heat transfer fluid is circulated round the system via the Heat Pump, never leaving the pipe network but gaining or losing energy to the ground.
Larger systems require a series of such boreholes and loops to be combined in a manifold which enables these multiple boreholes to return back to a single flow for onward transmission and connection to the Heat Pump.
All sub-surface joints are completed using fusion welding and are pressure tested before backfilling to ensure the pipework remains leak-free.