Ground-source or geothermal* heatpumps use the ground under our feet for energy storage. Heat is extracted from the ground for heating a home, and during cooling season heat removed from the home is dumped back under ground.
How it works:
A closed circuit ground loop is installed in a set of wells drilled on the property or in a series of trenches depending on the site topography, layout, and soil conditions. When the heat pump is operating, fluid is circulating though these pipes.
- During heating season the fluid absorbs heat from the surrounding earth. The heatpump then extracts energy from the fluid and brings it to a higher temperature level using its internal vapor compression system. The air handler then distributes the heat around the home.
- During cooling season heat from the house is absorbed by the heatpump resulting in active cooling and dehumidification. Using its internal vapor compression system, the heatpump transfers the heat to the fluid circulating in the piping of the ground loop, where it is then absorbed by the surrounding earth only to be reused again for heating next winter.
For every one unit of energy spent running this process between 3 and 5 units of energy are generated, which is why ground-source heating is the most efficient space conditioning technology available today.
The complete ground-source heatpump is located inside the home protected from the elements, which guarantees high efficiencies year round without risk of accumulating snow or leaves, or attacks from rodents or birds reducing performance or triggering a service call.
The loop field installed under ground has an expected service life exceeding 50 years, where the heat pump unit itself can be expected to become obsolete due to technological advances before the end of its serviceable life.
Contact BrightSense today to discuss how your project would benefit from tapping into the free energy below your feet.
* Ground source heatpumps do not use an active geothermal spring. In fact they work best with ground temperatures around 50 ºF (10 ºC).
Hans Joachim Preiss
Office: +1 720.500.5470