Closed loop GSHP

Closed loop ground source heat pump systems

n a closed loop ground source heat pump (GSHP) system, fluid-filled pipes in the ground (a ground loop) are used to absorb the free, naturally occurring heat from the earth.

The fluid (effectively a mixture of water and anti-freeze) passes through a heat exchanger unit, where it’s raised to a higher temperature for heating water for hot water and central heating systems.

Cooled fluid passes back into the ground loop where it once more absorbs further energy from the ground. It’s a process that continues naturally as long as the heat source is required by your building – be that a home or a business.

There are 2 slightly different types of high-efficiency closed loop ground source heating or ‘geothermal’ system:

Horizontal closed loop ground source heat pump system

Here, the ground loop pipe is installed in trenches excavated to a depth of up to 1 metre. The pipe is either laid straight or is coiled to reduce the length of the trenches.

To ensure a consistent heating performance, a significant amount of land is required to support such a system. Susceptibility to long term drops in ground temperature also means that a backup heating system is required.

Please note that Geologic Boreholes does not offer a groundworks service for such horizontal heat pump systems.

Vertical closed loop ground source heat pump system

If space is at a premium, the ground loop pipe in a vertical closed loop ground source heat pump system is installed within a borehole (or multiple boreholes) sunk to a depth of up to 100 metres.

To discuss the installation of your own vertical closed loop ground source heat pump system – to reduce your utility bills and help reduce carbon emissions – get in touch with Geologic Boreholes. Call 01404 822 032.