Lämpöpumppausjärjestelmien

Lämpöpumppausjärjestelmä refers to a heat pump system in Finnish. A heat pump is a device that transfers thermal energy from a source of heat to a destination called a "heat sink." Heat pumps move thermal energy, not create it. They can be used for heating or cooling. In a heating system, a heat pump moves heat from an outdoor environment (like the air, ground, or water) into a building. In a cooling system, it reverses the process, moving heat from inside the building to the outside.

The fundamental principle behind a heat pump is the refrigeration cycle, which involves a refrigerant fluid. This fluid circulates through the system, changing its state between liquid and gas. In the evaporator, the refrigerant absorbs heat from the source, becoming a gas. This gas is then compressed, increasing its temperature and pressure. In the condenser, the hot gas releases its heat to the destination (e.g., indoor air or water), condensing back into a liquid. Finally, an expansion valve reduces the pressure and temperature of the liquid refrigerant before it returns to the evaporator, completing the cycle.

There are several types of heat pump systems based on their heat source and sink. Air-source heat pumps use the outdoor air, ground-source (geothermal) heat pumps use the earth or groundwater, and water-source heat pumps use a body of water. Lämpöpumppausjärjestelmä can refer to any of these, with the specific type often clarified by additional terms. These systems are energy-efficient as they can deliver more thermal energy than the electrical energy they consume.