Water Source – Geothermal Heat Pumps
How to start a project using an water to water heat pump with water renewable energy?
How does a Water to Water Heat Pump work?
A water-to-water heat pump is a type of heat pump that transfers heat from one water source to another for heating or cooling purposes. It uses the principle of heat exchange to move thermal energy between two water circuits.
Heat source circuit:
The heat source circuit consists of a water source, such as a well, lake, or river, from which heat is extracted. A heat exchanger is used to transfer the heat from the source water to the refrigerant in the heat pump. The source water acts as a heat source during the heating mode and a heat sink during the cooling mode.
Evaporator:
The refrigerant in the heat pump’s evaporator coil absorbs heat from the source water, causing it to evaporate and become a low-pressure vapor. The heat transfer occurs as the source water flows through the heat exchanger, transferring its heat to the refrigerant.
Evaporator:
The refrigerant in the heat pump’s evaporator coil absorbs heat from the source water, causing it to evaporate and become a low-pressure vapor. The heat transfer occurs as the source water flows through the heat exchanger, transferring its heat to the refrigerant.
Compressor:
The vaporized refrigerant is then compressed by a compressor, which increases its temperature and pressure. The compression process requires energy, typically in the form of electricity.
Condenser:
The hot, high-pressure refrigerant flows to the condenser coil, where it releases its heat to another water circuit, known as the heat distribution circuit. The heat distribution circuit is responsible for delivering the heat to the desired space or for other applications, such as domestic hot water.
Expansion valve:
After releasing its heat, the refrigerant passes through an expansion valve, which reduces its pressure and temperature, causing it to expand.
Evaporator (again):
The expanded refrigerant then returns to the evaporator coil, where it absorbs more heat from the source water. The cycle repeats to continue extracting heat from the source water and transferring it to the heat distribution circuit.
The water-to-water heat pump system allows for efficient heating and cooling by utilizing water as a medium for heat exchange. It can be used for radiant floor heating, hydronic heating and cooling, and other applications where water is the desired medium for heat transfer. The efficiency and performance of a water-to-water heat pump depend on factors such as the temperature of the source water, the temperature requirements of the heat distribution circuit, and the efficiency of the heat pump unit.
