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horizontal ground loop
A type of closed-loop
geothermal heat pump system in which the fluid-filled plastic heat exchanger
pipes are laid out in a plane parallel to the ground surface. This type
of installation is generally most cost-effective for residential installations,
particularly for new construction where sufficient land is available. It
requires trenches at least four feet deep. The most common layouts either
use two pipes, one buried at six feet, and the other at four feet, or two
pipes placed side-by-side at five feet in the ground in a two-foot wide
trench. The Slinky™ method of looping pipe allows more pipe in a shorter
trench, which cuts down on installation costs and makes horizontal installation
possible in areas it would not be with conventional horizontal applications.
Related category
• GEOTHERMAL
ENERGY AND POWER
Source: US Department of Energy
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