|
How Geothermal Works
Geothermal can be used for providing heating or cooling services. In each instance the process is similar.
Geothermal Heating
In the heating mode, the water circulating in the earth loop is colder than the surrounding ground.
This causes the water to absorb energy, in the form of heat, from the earth. The water carries this
energy to the heat exchanger in the pump. In the heat exchanger, refrigerant absorbs the heat energy
from the water. The water now leaves the heat exchanger at a colder temperature, and circulates through
the earth loop to pick up more energy.
The refrigerant gas, which contains energy gained from the earth loop, travels from the heat
exchanger to the compressor. In the compressor, the refrigerant temperature rises to 160°. From
the compressor, the superheated refrigerant travels to the air heat exchanger. Here, the heat pump's
blower circulates air across the air coil, increasing the temperature of the air, which is blown through
ductwork to heat the home. After refrigerant releases its heat energy to the air, it then flows to the earth
loop heat exchanger to start the cycle again.
Geothermal Cooling
In the cooling mode, the water circulating in the earth loop is warmer than the surrounding ground.
This causes the water to release energy, in the form of heat, into the earth. The water, now cooler from
traveling through the ground now flows to the heat exchanger in the heat pump. In the heat exchanger, hot
refrigerant gas from the compressor releases its heat into the water. This causes the water to increase
temperature, which it releases to the ground.
The refrigerant, which has released its heat energy and became a cold liquid, now travels to the
heat exchanger. Here the heat pump's blower circulates warm, humid air across the cold air coil.
The air is then blown through ductwork to cool the home. The refrigerant in the air coil picks up
the heat energy from the air, and travels to the compressor. When the refrigerant leaves the compressor,
it then flows to the earth loop heat exchanger to start the cycle again.
[Source: ECONAR]
More reading:
http://www.econar.com
ECONAR has been producing GeoSource geothermal heat pumps in Minnesota for a quarter of a century.
Minnesota's cold winter climate has driven the design of ECONAR's heating and cooling equipment to what is known as a "ColdClimate"
geothermal heat pump. This cold climate technology maximizes the energy savings available in heating dominated regions without
sacrificing comfort, thus making ECONAR the leader in cold climate heat pump technology. Extremely efficient cooling,
dehumidification and optional domestic hot water heating are also provided in one neatly packaged system.
|
