In a Geothermal Heat Pump, which part picks up heat from the ground loop during heating mode?

In a Geothermal Heat Pump, the evaporator is responsible for picking up heat from the ground loop during heating mode. This component facilitates the transfer of thermal energy from the ground loop fluid to the refrigerant inside the system. As the refrigerant flows through the evaporator, it absorbs heat from the ground loop, causing the refrigerant to evaporate and change from a liquid to a gas.

This process is critical in heating mode because it allows the heat pump to harness geothermal energy, which is then compressed and circulated throughout the building to provide heating. Understanding the role of the evaporator highlights its importance in effective heat transfer, making it an essential component in the operation of geothermal systems.

The compressor, condenser, and expansion valve also play vital roles in the overall heat pump cycle, but they do not directly gather heat from the ground loop. The compressor increases the pressure and temperature of the refrigerant, the condenser releases heat to the indoor space, and the expansion valve reduces the pressure of the refrigerant, enabling it to absorb heat effectively.