How heat pump works?

1. The EVAPORATOR collects heat from  the outside ambient air, pre-heated by thesun. Heat pumps high volumes of outside air are drawn into the unit by the fan and expelled through the evaporator fins. The evaporator has liquid refrigerant passing through it, which is at a considerably lower temperature than the ambient air, therefore the air gives its heat to the refrigerant, which then vaporizes. This is pre-heating.

2. The COMPRESSOR where it is compresses and upgraded to a much higher temperature. The hot vapour now enters to the CONDENSER.

3. The CONDENSER where it is surrounded by water from the heating system. The heat is given off to the cooler water and the now cooler refrigerant returns to its former liquid state but still under high pressure from the compressor. This pressure isreleased by passing the liquid through the EXPANSION DEVICE.

4. The EXPANSION DEVICE and from there now at low pressure, it is returned to the evaporator and the cycle starts again.

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