Geothermal

Geothermal Systems, or Ground Source Heat Pumps (GSHP), Offer Clean, Reliable and Sustainable Energy

Geothermal energy is heat that is created and stored in the Earth. Geothermal Heat Pumps (GHPs), or Ground Source Heat Pumps (GSHPs), use the constant temperature of the earth as the exchange medium, instead of relying on outside air temperature.

Operation

A GHP consists of a heat pump, ductwork and a heat exchanger. The heat exchanger is a system of pipes buried in the shallow ground near the building. In commercial applications, this system is generally vertical closed loop system.

The shallow ground, or upper 10 feet of the Earth’s surface, maintains a relatively constant temperature, throughout all seasons, that usually ranges from 45°F to 75°F. In the winter, the heat pump removes heat from the heat exchanger and pumps it into the ductwork. In the summer, the heat pump moves heat from the indoor air into the heat exchanger. If the system is equipped, this heat from the indoor air in the summer can be used to heat water.

Benefits

 Geothermal systems are quieter, last longer, need little to maintenance and do not depend on the temperature of the outside air.

The installation cost of a geothermal system can be rather expensive. These additional costs, however, are covered after about five to ten years of energy savings. The inside components have a useful life of about 25 year and the ground loop should last for over 50 years.