HOW GEOEXCHANGE WORKS

Heating & cooling from the ground up.

“Geothermal” is the commonly used term for sourcing heat from the ground. “Geoexchange” is a geothermal application which uses the geothermal heat capacity of the Earth to provide both heating and cooling.

The temperature of the ground below the frost line remains relatively constant year-round (1). This natural heat is collected through a series of pipes, called a ground loop (2), which is installed below ground and filled with a mixture of water and environmentally friendly antifreeze. The length of pipe required is determined by the size and design of the home or building. In general, the bigger the building, the longer the loop. Technically speaking, the length of the pipe is determined by the building’s heat loss.

The fluid is circulated through the loop, where it exchanges heat with the ground – in the same way your hand will exchange heat with a hot cup of coffee or a cold glass of water. The cooler surface will always be heated by the warmer one. The warmed fluid continues to circulate from the ground to a smart machine called a heat pump (3).

The heat pump increases the heat from the fluid in the loop by compressing it, and then transfers it across a heat exchanger and into the air stream, where a blower distributes heated air through the ductwork just like a conventional forced air furnace (4).

During the summer months, the system is run in reverse to provide air conditioning. Instead of putting heat into the air stream, the heat pump draws it out and transfers it into the ground loop. The warmer fluid exchanges its heat with the cooler earth and there it remains until needed again in the cold seasons.

Your CleanEnergy™ system generates enough heat for much of your home’s hot water system, too (5). When connected to the hot water tank, an optional hot water assist, called a desuperheater, can provide approximately 50% of a typical home’s hot water needs.

The heat pump system can also be designed to transfer the energy into water to operate a radiant floor heating system.

On sites that have a suitable nearby body of water such as a lake or pond, the system economics and efficiencies can be further enhanced by installing the loop in the water as an alternative to drilling a vertical loop or excavating a horizontal loop.