Ground Heat Pump systems use the stored solar energy in the earth.
STEP 1: Ground source heat pump uses fluid to absorb heat from the ground
STEP 2: Using electricity, the pump compresses the fluid and realeases it at higher temperature
STEP 3: Heat is sent to radiators or underfloor heating- the remainder is stored in a hot water cylinder
STEP 4: Stored hot water can be used for showers, bath and taps
A closed ground loop system consists of a series of high density polyethylene pipes buried in your yard.
Vertical loops are used in urban areas areas where is a restriction of available land or if soil is too difficult to trench. Drilling equipment is used to bore small-diameter holes. Pipes place in these holes are connected at the bottom with a u-bend to form a loop. Each vertical pipe is then connected to a horizontal underground pipe that carries fluid to and from the indoor heat exchange pump. Vertical loops require less piping than horizontal loops.
Horizontal ground loops are the most common system for residential homes, when enough land is available to lay out a system and trenches are easy to dig. Piping is laid in trenches which range from 30 to 120 metres in length. Horizontal loops typically require 30-100 ftm of trench with 180-400 m of pipe per ton.