Parts of Your Geothermal Heat Pump Explained
A geothermal heat pump is one of the best in the world. You can get many different kinds of this form of heat pump which work well in the ground. The pump can be used in the same way that an HVAC device is used, warming the rooms when needed, and providing cooling air when the temperature is too warm. Geothermal systems use the heat pump to move heat from the ground to the home, often forcing this energy against the natural direction of the flow. It is sometimes possible for the heat to be inconsistent, although most seasonal variations drop off after a depth of several feet. There are several parts of a heat pump that you should be familiar with:
Direct Exchange Pumps
These pumps are the old boys of the heat pump school, and are as a result the most basic. They are set in the ground, with a single loop of refrigerating fluid traveling through, and then away from the ground. The loop is being moved through the system by the pump. This is the reason for the name direct exchange, as the heat transfer is directly between the ground and the liquid in the tube. More modern geothermal heat pumps use a similar type of heat exchanger which extracts heat from the refrigeration liquid through compression. The latter kinds of heat exchanger can also pass heat back into the refrigeration liquid during summer.
Heat Pump Unit
This is the part of the geothermal heat pump that transfers power from the heat exchanger into the house. This pump takes the air from the exchanger, and forces it through a series of ducts and filters until it reaches the part of the home which is connected to the inside. These kinds of pumps can sometimes struggle in the depths of winter, and you may need to use defrosting tools on the outside of the pump before it can work. Heat pumps can also be used in the summer to take heat out of the air ducts, and pass it back to the heat exchanger.
On the inside of the house, air ducts receive the warm air from the heat pump, and this is then transfer throughout the house. They can also function during the summer to extract heat from the home, and pass it back to the heat pump. With both of these methods of heating or cooling the house, it is important to regularly maintain the air ducts because they can sometimes become blocked with dirt and debris. Air ducts will also house filters and other parts which collect dirt, and these need to be regularly changed in order to keep the system functioning. Most duct pipes have to be fitted by a professional to ensure that they meet the rules established in the Uniform Mechanical Code.