Recently, many inquisitive Wilmington residents have asked Sobieski Services Inc. about geothermal. Sure, geothermal heat pumps use the earth to condition your home... but how do they do it?
This marvelous system works thanks to one simple principle: Given the opportunity, heat seeks out and moves towards cooler temperatures. That's why an ice cube melts and it's how a geothermal heat pump is able to deliver heat. Here's how geothermal works
In the absence of a
combustible material, geothermal systems obtain heat differently. It simply collects and moves it using the principle stated above. In order to
carry heat energy from one major component of the system to another, a special liquid called refrigerant is used. The refrigerant is moved throughout the system by a powerful centrifugal pump called a compressor.
During the summer, a blower circulates warm indoor air through your home's duct system. The air is eventually forced across a series of
metal pipes and thin fins called an air coil. The air coil houses cold refrigerant and naturally absorbs the surplus heat from your air. The
refrigerant carries that heat into the compressor where it's put under an immense degree of pressure. When refrigerant is put under pressure, its
molecules are concentrated and collide more often - making it very hot.
Next, the hot refrigerant is pumped through a copper tube-within-a-tube called the coaxial coil. The inner tube contains water circulating from
underground pipes (called a loop), while the outer tube contains refrigerant. The refrigerant passes its heat through the wall of the coil and warms
the loop water. A loop pump circulates the warmed water back underground where the heat that began in your home is deposited into the earth. At the
same time, the refrigerant in the coaxial coil is pumped through an area of low pressure called an expansion valve. The decreased pressure allows the
refrigerant to expand rapidly. When refrigerant expands, its molecules get farther apart and collide less often - making it very cold. The cold
refrigerant is now ready to be circulated back to the air coil, where the process can begin again.
To heat your home, the system literally reverses the entire process using a reversing valve. Refrigerant flows in the opposite direction and order of components.
Sobieski Services Inc. hopes this information has been helpful in your decision to install an energy-saving geothermal system. We install one of the most efficient geothermal heat pumps on the market; WaterFurnace. We serve all of Wilmington and the surrounding areas. Contact us today.