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Renewable Energy - Ground Source Heat Pumps

Ground source heat pumps extract heat from pipes buried in the ground. This can be used to heat conventional radiators or under floor heating systems and hot water. The ground stays at a fairly constant temperature beneath the surface, so a ground source heat pump can be used throughout the year.

The three main types of system are:

Open Bore Hole System >>>

Vertical Closed Loop System >>>

Horizontal Closed Loop System >>>

How does a ground source heat pump work?

A mixture of water and antifreeze is circulated around a loop of pipe - called a ground loop - which is buried in the garden. Heat from the ground is absorbed and pumped through a heat exchanger in the heat pump. Low heat passes through the heat pump compressor and is concentrated into a higher temperature capable of heating water for the heating and hot water. Ground loop fluid travels back into the ground where it absorbs further energy in a continuous process while heating is required.

Heat pumps deliver heat at lower temperatures, unlike gas or oil boilers, over much longer periods. This means that during the winter they may need to be left on day and night to heat your home efficiently.

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