closed-loop geothermal heat pump system
A closed-loop geothermal heat pump system, also known as an indirect system, is a geothermal
heat pump system that circulates a solution of water and antifreeze
through a series of sealed loops of piping. Once the heat has been transferred
into or out of the solution, the solution is recirculated. The loops can
be installed in the ground horizontally (see horizontal
ground loop) or vertically (see vertical
ground loop), or they can be placed in a body of water, such as a pond
(see surface water loop).
|Domestic vertical closed-loop system
Compare with open-loop
geothermal heat pump system.
ENERGY AND POWER