Geothermal Heat Pumps

Geo-Thermal Energy Options

Borehole Collector

Of the varying types of geothermal heatpump systems, a borehole is the most independant of climate conditions and is therefore most efficient. It consists of one or more vertical wells (depending on heat demand) into which a collector is sunk. A collector consists of two pipes which draw heat from underground. The advantages of boreholes are that they fit in a smaller garden than a horizontal array. It has a COP (Coefficient of Performance) of about 4.5 kilowatts.

Horizontal Pipe Array

A horizontal array collector for a heatpump consists of a network of zig zag lines of pipes commonly called a loop.  Like a borehole system, these pipes are filled with a liquid that absorbs heat from the surrounding soil.

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